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| author | Vittorio Giovara <vittorio.giovara@gmail.com> | 2013-10-28 18:30:13 +0100 |
|---|---|---|
| committer | Vittorio Giovara <vittorio.giovara@gmail.com> | 2013-11-19 14:48:36 +0100 |
| commit | d234c7a07c1313fd215e8e242492bf71f5f3321e (patch) | |
| tree | b61a07abeae3bba52030e7f94be8f8e4a773b29a | |
| parent | 8769113accf1f3b78634dec60b37f7354ed6d88d (diff) | |
| download | ffmpeg-d234c7a07c1313fd215e8e242492bf71f5f3321e.tar.gz | |
mpeg4videodec: K&R formatting cosmetics
| -rw-r--r-- | libavcodec/mpeg4videodec.c | 2677 |
1 files changed, 1441 insertions, 1236 deletions
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c index 9a0b42b6f5..59aadd7b6e 100644 --- a/libavcodec/mpeg4videodec.c +++ b/libavcodec/mpeg4videodec.c @@ -27,24 +27,23 @@ #include "h263.h" #include "thread.h" -// The defines below define the number of bits that are read at once for -// reading vlc values. Changing these may improve speed and data cache needs -// be aware though that decreasing them may need the number of stages that is -// passed to get_vlc* to be increased. +/* The defines below define the number of bits that are read at once for + * reading vlc values. Changing these may improve speed and data cache needs + * be aware though that decreasing them may need the number of stages that is + * passed to get_vlc* to be increased. */ #define SPRITE_TRAJ_VLC_BITS 6 #define DC_VLC_BITS 9 #define MB_TYPE_B_VLC_BITS 4 - static VLC dc_lum, dc_chrom; static VLC sprite_trajectory; static VLC mb_type_b_vlc; -static const int mb_type_b_map[4]= { +static const int mb_type_b_map[4] = { MB_TYPE_DIRECT2 | MB_TYPE_L0L1, - MB_TYPE_L0L1 | MB_TYPE_16x16, - MB_TYPE_L1 | MB_TYPE_16x16, - MB_TYPE_L0 | MB_TYPE_16x16, + MB_TYPE_L0L1 | MB_TYPE_16x16, + MB_TYPE_L1 | MB_TYPE_16x16, + MB_TYPE_L0 | MB_TYPE_16x16, }; /** @@ -52,102 +51,99 @@ static const int mb_type_b_map[4]= { * @param n block index (0-3 are luma, 4-5 are chroma) * @param dir the ac prediction direction */ -void ff_mpeg4_pred_ac(MpegEncContext * s, int16_t *block, int n, - int dir) +void ff_mpeg4_pred_ac(MpegEncContext *s, int16_t *block, int n, int dir) { int i; int16_t *ac_val, *ac_val1; - int8_t * const qscale_table = s->current_picture.qscale_table; + int8_t *const qscale_table = s->current_picture.qscale_table; /* find prediction */ - ac_val = s->ac_val[0][0] + s->block_index[n] * 16; + ac_val = s->ac_val[0][0] + s->block_index[n] * 16; ac_val1 = ac_val; if (s->ac_pred) { if (dir == 0) { - const int xy= s->mb_x-1 + s->mb_y*s->mb_stride; + const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride; /* left prediction */ ac_val -= 16; - if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){ + if (s->mb_x == 0 || s->qscale == qscale_table[xy] || + n == 1 || n == 3) { /* same qscale */ - for(i=1;i<8;i++) { - block[s->dsp.idct_permutation[i<<3]] += ac_val[i]; - } - }else{ + for (i = 1; i < 8; i++) + block[s->dsp.idct_permutation[i << 3]] += ac_val[i]; + } else { /* different qscale, we must rescale */ - for(i=1;i<8;i++) { - block[s->dsp.idct_permutation[i<<3]] += ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale); - } + for (i = 1; i < 8; i++) + block[s->dsp.idct_permutation[i << 3]] += ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale); } } else { - const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride; + const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride; /* top prediction */ ac_val -= 16 * s->block_wrap[n]; - if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){ + if (s->mb_y == 0 || s->qscale == qscale_table[xy] || + n == 2 || n == 3) { /* same qscale */ - for(i=1;i<8;i++) { + for (i = 1; i < 8; i++) block[s->dsp.idct_permutation[i]] += ac_val[i + 8]; - } - }else{ + } else { /* different qscale, we must rescale */ - for(i=1;i<8;i++) { - block[s->dsp.idct_permutation[i]] += ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale); - } + for (i = 1; i < 8; i++) + block[s->dsp.idct_permutation[i]] += ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale); } } } /* left copy */ - for(i=1;i<8;i++) - ac_val1[i ] = block[s->dsp.idct_permutation[i<<3]]; + for (i = 1; i < 8; i++) + ac_val1[i] = block[s->dsp.idct_permutation[i << 3]]; /* top copy */ - for(i=1;i<8;i++) - ac_val1[8 + i] = block[s->dsp.idct_permutation[i ]]; - + for (i = 1; i < 8; i++) + ac_val1[8 + i] = block[s->dsp.idct_permutation[i]]; } /** * check if the next stuff is a resync marker or the end. * @return 0 if not */ -static inline int mpeg4_is_resync(MpegEncContext *s){ - int bits_count= get_bits_count(&s->gb); - int v= show_bits(&s->gb, 16); +static inline int mpeg4_is_resync(MpegEncContext *s) +{ + int bits_count = get_bits_count(&s->gb); + int v = show_bits(&s->gb, 16); - if(s->workaround_bugs&FF_BUG_NO_PADDING){ + if (s->workaround_bugs & FF_BUG_NO_PADDING) return 0; - } - while(v<=0xFF){ - if(s->pict_type==AV_PICTURE_TYPE_B || (v>>(8-s->pict_type)!=1) || s->partitioned_frame) + while (v <= 0xFF) { + if (s->pict_type == AV_PICTURE_TYPE_B || + (v >> (8 - s->pict_type) != 1) || s->partitioned_frame) break; - skip_bits(&s->gb, 8+s->pict_type); - bits_count+= 8+s->pict_type; - v= show_bits(&s->gb, 16); + skip_bits(&s->gb, 8 + s->pict_type); + bits_count += 8 + s->pict_type; + v = show_bits(&s->gb, 16); } - if(bits_count + 8 >= s->gb.size_in_bits){ - v>>=8; - v|= 0x7F >> (7-(bits_count&7)); + if (bits_count + 8 >= s->gb.size_in_bits) { + v >>= 8; + v |= 0x7F >> (7 - (bits_count & 7)); - if(v==0x7F) + if (v == 0x7F) return 1; - }else{ - if(v == ff_mpeg4_resync_prefix[bits_count&7]){ + } else { + if (v == ff_mpeg4_resync_prefix[bits_count & 7]) { int len; - GetBitContext gb= s->gb; + GetBitContext gb = s->gb; skip_bits(&s->gb, 1); align_get_bits(&s->gb); - for(len=0; len<32; len++){ - if(get_bits1(&s->gb)) break; - } + for (len = 0; len < 32; len++) + if (get_bits1(&s->gb)) + break; - s->gb= gb; + s->gb = gb; - if(len>=ff_mpeg4_get_video_packet_prefix_length(s)) + if (len >= ff_mpeg4_get_video_packet_prefix_length(s)) return 1; } } @@ -156,195 +152,215 @@ static inline int mpeg4_is_resync(MpegEncContext *s){ static int mpeg4_decode_sprite_trajectory(MpegEncContext *s, GetBitContext *gb) { - int i; - int a= 2<<s->sprite_warping_accuracy; - int rho= 3-s->sprite_warping_accuracy; - int r=16/a; - const int vop_ref[4][2]= {{0,0}, {s->width,0}, {0, s->height}, {s->width, s->height}}; // only true for rectangle shapes - int d[4][2]={{0,0}, {0,0}, {0,0}, {0,0}}; + int a = 2 << s->sprite_warping_accuracy; + int rho = 3 - s->sprite_warping_accuracy; + int r = 16 / a; + int alpha = 0; + int beta = 0; + int w = s->width; + int h = s->height; + int min_ab, i, w2, h2, w3, h3; int sprite_ref[4][2]; int virtual_ref[2][2]; - int w2, h2, w3, h3; - int alpha=0, beta=0; - int w= s->width; - int h= s->height; - int min_ab; + + // only true for rectangle shapes + const int vop_ref[4][2] = { { 0, 0 }, { s->width, 0 }, + { 0, s->height }, { s->width, s->height } }; + int d[4][2] = { { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 } }; if (w <= 0 || h <= 0) return AVERROR_INVALIDDATA; - for(i=0; i<s->num_sprite_warping_points; i++){ + for (i = 0; i < s->num_sprite_warping_points; i++) { int length; - int x=0, y=0; + int x = 0, y = 0; - length= get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3); - if(length){ - x= get_xbits(gb, length); - } - if(!(s->divx_version==500 && s->divx_build==413)) skip_bits1(gb); /* marker bit */ + length = get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3); + if (length) + x = get_xbits(gb, length); - length= get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3); - if(length){ - y=get_xbits(gb, length); - } - skip_bits1(gb); /* marker bit */ - s->sprite_traj[i][0]= d[i][0]= x; - s->sprite_traj[i][1]= d[i][1]= y; + if (!(s->divx_version == 500 && s->divx_build == 413)) + skip_bits1(gb); /* marker bit */ + + length = get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3); + if (length) + y = get_xbits(gb, length); + + skip_bits1(gb); /* marker bit */ + s->sprite_traj[i][0] = d[i][0] = x; + s->sprite_traj[i][1] = d[i][1] = y; } - for(; i<4; i++) - s->sprite_traj[i][0]= s->sprite_traj[i][1]= 0; - - while((1<<alpha)<w) alpha++; - while((1<<beta )<h) beta++; // there seems to be a typo in the mpeg4 std for the definition of w' and h' - w2= 1<<alpha; - h2= 1<<beta; - -// Note, the 4th point isn't used for GMC - if(s->divx_version==500 && s->divx_build==413){ - sprite_ref[0][0]= a*vop_ref[0][0] + d[0][0]; - sprite_ref[0][1]= a*vop_ref[0][1] + d[0][1]; - sprite_ref[1][0]= a*vop_ref[1][0] + d[0][0] + d[1][0]; - sprite_ref[1][1]= a*vop_ref[1][1] + d[0][1] + d[1][1]; - sprite_ref[2][0]= a*vop_ref[2][0] + d[0][0] + d[2][0]; - sprite_ref[2][1]= a*vop_ref[2][1] + d[0][1] + d[2][1]; + for (; i < 4; i++) + s->sprite_traj[i][0] = s->sprite_traj[i][1] = 0; + + while ((1 << alpha) < w) + alpha++; + while ((1 << beta) < h) + beta++; /* typo in the mpeg4 std for the definition of w' and h' */ + w2 = 1 << alpha; + h2 = 1 << beta; + + // Note, the 4th point isn't used for GMC + if (s->divx_version == 500 && s->divx_build == 413) { + sprite_ref[0][0] = a * vop_ref[0][0] + d[0][0]; + sprite_ref[0][1] = a * vop_ref[0][1] + d[0][1]; + sprite_ref[1][0] = a * vop_ref[1][0] + d[0][0] + d[1][0]; + sprite_ref[1][1] = a * vop_ref[1][1] + d[0][1] + d[1][1]; + sprite_ref[2][0] = a * vop_ref[2][0] + d[0][0] + d[2][0]; + sprite_ref[2][1] = a * vop_ref[2][1] + d[0][1] + d[2][1]; } else { - sprite_ref[0][0]= (a>>1)*(2*vop_ref[0][0] + d[0][0]); - sprite_ref[0][1]= (a>>1)*(2*vop_ref[0][1] + d[0][1]); - sprite_ref[1][0]= (a>>1)*(2*vop_ref[1][0] + d[0][0] + d[1][0]); - sprite_ref[1][1]= (a>>1)*(2*vop_ref[1][1] + d[0][1] + d[1][1]); - sprite_ref[2][0]= (a>>1)*(2*vop_ref[2][0] + d[0][0] + d[2][0]); - sprite_ref[2][1]= (a>>1)*(2*vop_ref[2][1] + d[0][1] + d[2][1]); + sprite_ref[0][0] = (a >> 1) * (2 * vop_ref[0][0] + d[0][0]); + sprite_ref[0][1] = (a >> 1) * (2 * vop_ref[0][1] + d[0][1]); + sprite_ref[1][0] = (a >> 1) * (2 * vop_ref[1][0] + d[0][0] + d[1][0]); + sprite_ref[1][1] = (a >> 1) * (2 * vop_ref[1][1] + d[0][1] + d[1][1]); + sprite_ref[2][0] = (a >> 1) * (2 * vop_ref[2][0] + d[0][0] + d[2][0]); + sprite_ref[2][1] = (a >> 1) * (2 * vop_ref[2][1] + d[0][1] + d[2][1]); } -/* sprite_ref[3][0]= (a>>1)*(2*vop_ref[3][0] + d[0][0] + d[1][0] + d[2][0] + d[3][0]); - sprite_ref[3][1]= (a>>1)*(2*vop_ref[3][1] + d[0][1] + d[1][1] + d[2][1] + d[3][1]); */ - -// this is mostly identical to the mpeg4 std (and is totally unreadable because of that ...) -// perhaps it should be reordered to be more readable ... -// the idea behind this virtual_ref mess is to be able to use shifts later per pixel instead of divides -// so the distance between points is converted from w&h based to w2&h2 based which are of the 2^x form - virtual_ref[0][0]= 16*(vop_ref[0][0] + w2) - + ROUNDED_DIV(((w - w2)*(r*sprite_ref[0][0] - 16*vop_ref[0][0]) + w2*(r*sprite_ref[1][0] - 16*vop_ref[1][0])),w); - virtual_ref[0][1]= 16*vop_ref[0][1] - + ROUNDED_DIV(((w - w2)*(r*sprite_ref[0][1] - 16*vop_ref[0][1]) + w2*(r*sprite_ref[1][1] - 16*vop_ref[1][1])),w); - virtual_ref[1][0]= 16*vop_ref[0][0] - + ROUNDED_DIV(((h - h2)*(r*sprite_ref[0][0] - 16*vop_ref[0][0]) + h2*(r*sprite_ref[2][0] - 16*vop_ref[2][0])),h); - virtual_ref[1][1]= 16*(vop_ref[0][1] + h2) - + ROUNDED_DIV(((h - h2)*(r*sprite_ref[0][1] - 16*vop_ref[0][1]) + h2*(r*sprite_ref[2][1] - 16*vop_ref[2][1])),h); - - switch(s->num_sprite_warping_points) - { - case 0: - s->sprite_offset[0][0]= 0; - s->sprite_offset[0][1]= 0; - s->sprite_offset[1][0]= 0; - s->sprite_offset[1][1]= 0; - s->sprite_delta[0][0]= a; - s->sprite_delta[0][1]= 0; - s->sprite_delta[1][0]= 0; - s->sprite_delta[1][1]= a; - s->sprite_shift[0]= 0; - s->sprite_shift[1]= 0; - break; - case 1: //GMC only - s->sprite_offset[0][0]= sprite_ref[0][0] - a*vop_ref[0][0]; - s->sprite_offset[0][1]= sprite_ref[0][1] - a*vop_ref[0][1]; - s->sprite_offset[1][0]= ((sprite_ref[0][0]>>1)|(sprite_ref[0][0]&1)) - a*(vop_ref[0][0]/2); - s->sprite_offset[1][1]= ((sprite_ref[0][1]>>1)|(sprite_ref[0][1]&1)) - a*(vop_ref[0][1]/2); - s->sprite_delta[0][0]= a; - s->sprite_delta[0][1]= 0; - s->sprite_delta[1][0]= 0; - s->sprite_delta[1][1]= a; - s->sprite_shift[0]= 0; - s->sprite_shift[1]= 0; - break; - case 2: - s->sprite_offset[0][0]= (sprite_ref[0][0]<<(alpha+rho)) - + (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][0]) - + ( r*sprite_ref[0][1] - virtual_ref[0][1])*(-vop_ref[0][1]) - + (1<<(alpha+rho-1)); - s->sprite_offset[0][1]= (sprite_ref[0][1]<<(alpha+rho)) - + (-r*sprite_ref[0][1] + virtual_ref[0][1])*(-vop_ref[0][0]) - + (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][1]) - + (1<<(alpha+rho-1)); - s->sprite_offset[1][0]= ( (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][0] + 1) - +( r*sprite_ref[0][1] - virtual_ref[0][1])*(-2*vop_ref[0][1] + 1) - +2*w2*r*sprite_ref[0][0] - - 16*w2 - + (1<<(alpha+rho+1))); - s->sprite_offset[1][1]= ( (-r*sprite_ref[0][1] + virtual_ref[0][1])*(-2*vop_ref[0][0] + 1) - +(-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][1] + 1) - +2*w2*r*sprite_ref[0][1] - - 16*w2 - + (1<<(alpha+rho+1))); - s->sprite_delta[0][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0]); - s->sprite_delta[0][1]= (+r*sprite_ref[0][1] - virtual_ref[0][1]); - s->sprite_delta[1][0]= (-r*sprite_ref[0][1] + virtual_ref[0][1]); - s->sprite_delta[1][1]= (-r*sprite_ref[0][0] + virtual_ref[0][0]); - - s->sprite_shift[0]= alpha+rho; - s->sprite_shift[1]= alpha+rho+2; - break; - case 3: - min_ab= FFMIN(alpha, beta); - w3= w2>>min_ab; - h3= h2>>min_ab; - s->sprite_offset[0][0]= (sprite_ref[0][0]<<(alpha+beta+rho-min_ab)) - + (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3*(-vop_ref[0][0]) - + (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3*(-vop_ref[0][1]) - + (1<<(alpha+beta+rho-min_ab-1)); - s->sprite_offset[0][1]= (sprite_ref[0][1]<<(alpha+beta+rho-min_ab)) - + (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3*(-vop_ref[0][0]) - + (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3*(-vop_ref[0][1]) - + (1<<(alpha+beta+rho-min_ab-1)); - s->sprite_offset[1][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3*(-2*vop_ref[0][0] + 1) - + (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3*(-2*vop_ref[0][1] + 1) - + 2*w2*h3*r*sprite_ref[0][0] - - 16*w2*h3 - + (1<<(alpha+beta+rho-min_ab+1)); - s->sprite_offset[1][1]= (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3*(-2*vop_ref[0][0] + 1) - + (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3*(-2*vop_ref[0][1] + 1) - + 2*w2*h3*r*sprite_ref[0][1] - - 16*w2*h3 - + (1<<(alpha+beta+rho-min_ab+1)); - s->sprite_delta[0][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3; - s->sprite_delta[0][1]= (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3; - s->sprite_delta[1][0]= (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3; - s->sprite_delta[1][1]= (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3; - - s->sprite_shift[0]= alpha + beta + rho - min_ab; - s->sprite_shift[1]= alpha + beta + rho - min_ab + 2; - break; + /* sprite_ref[3][0] = (a >> 1) * (2 * vop_ref[3][0] + d[0][0] + d[1][0] + d[2][0] + d[3][0]); + * sprite_ref[3][1] = (a >> 1) * (2 * vop_ref[3][1] + d[0][1] + d[1][1] + d[2][1] + d[3][1]); */ + + /* this is mostly identical to the mpeg4 std (and is totally unreadable + * because of that...). Perhaps it should be reordered to be more readable. + * The idea behind this virtual_ref mess is to be able to use shifts later + * per pixel instead of divides so the distance between points is converted + * from w&h based to w2&h2 based which are of the 2^x form. */ + virtual_ref[0][0] = 16 * (vop_ref[0][0] + w2) + + ROUNDED_DIV(((w - w2) * + (r * sprite_ref[0][0] - 16 * vop_ref[0][0]) + + w2 * (r * sprite_ref[1][0] - 16 * vop_ref[1][0])), w); + virtual_ref[0][1] = 16 * vop_ref[0][1] + + ROUNDED_DIV(((w - w2) * + (r * sprite_ref[0][1] - 16 * vop_ref[0][1]) + + w2 * (r * sprite_ref[1][1] - 16 * vop_ref[1][1])), w); + virtual_ref[1][0] = 16 * vop_ref[0][0] + + ROUNDED_DIV(((h - h2) * (r * sprite_ref[0][0] - 16 * vop_ref[0][0]) + + h2 * (r * sprite_ref[2][0] - 16 * vop_ref[2][0])), h); + virtual_ref[1][1] = 16 * (vop_ref[0][1] + h2) + + ROUNDED_DIV(((h - h2) * (r * sprite_ref[0][1] - 16 * vop_ref[0][1]) + + h2 * (r * sprite_ref[2][1] - 16 * vop_ref[2][1])), h); + + switch (s->num_sprite_warping_points) { + case 0: + s->sprite_offset[0][0] = + s->sprite_offset[0][1] = + s->sprite_offset[1][0] = + s->sprite_offset[1][1] = 0; + s->sprite_delta[0][0] = a; + s->sprite_delta[0][1] = + s->sprite_delta[1][0] = 0; + s->sprite_delta[1][1] = a; + s->sprite_shift[0] = + s->sprite_shift[1] = 0; + break; + case 1: // GMC only + s->sprite_offset[0][0] = sprite_ref[0][0] - a * vop_ref[0][0]; + s->sprite_offset[0][1] = sprite_ref[0][1] - a * vop_ref[0][1]; + s->sprite_offset[1][0] = ((sprite_ref[0][0] >> 1) | (sprite_ref[0][0] & 1)) - + a * (vop_ref[0][0] / 2); + s->sprite_offset[1][1] = ((sprite_ref[0][1] >> 1) | (sprite_ref[0][1] & 1)) - + a * (vop_ref[0][1] / 2); + s->sprite_delta[0][0] = a; + s->sprite_delta[0][1] = + s->sprite_delta[1][0] = 0; + s->sprite_delta[1][1] = a; + s->sprite_shift[0] = + s->sprite_shift[1] = 0; + break; + case 2: + s->sprite_offset[0][0] = (sprite_ref[0][0] << (alpha + rho)) + + (-r * sprite_ref[0][0] + virtual_ref[0][0]) * + (-vop_ref[0][0]) + + (r * sprite_ref[0][1] - virtual_ref[0][1]) * + (-vop_ref[0][1]) + (1 << (alpha + rho - 1)); + s->sprite_offset[0][1] = (sprite_ref[0][1] << (alpha + rho)) + + (-r * sprite_ref[0][1] + virtual_ref[0][1]) * + (-vop_ref[0][0]) + + (-r * sprite_ref[0][0] + virtual_ref[0][0]) * + (-vop_ref[0][1]) + (1 << (alpha + rho - 1)); + s->sprite_offset[1][0] = ((-r * sprite_ref[0][0] + virtual_ref[0][0]) * + (-2 * vop_ref[0][0] + 1) + + (r * sprite_ref[0][1] - virtual_ref[0][1]) * + (-2 * vop_ref[0][1] + 1) + 2 * w2 * r * + sprite_ref[0][0] - 16 * w2 + (1 << (alpha + rho + 1))); + s->sprite_offset[1][1] = ((-r * sprite_ref[0][1] + virtual_ref[0][1]) * + (-2 * vop_ref[0][0] + 1) + + (-r * sprite_ref[0][0] + virtual_ref[0][0]) * + (-2 * vop_ref[0][1] + 1) + 2 * w2 * r * + sprite_ref[0][1] - 16 * w2 + (1 << (alpha + rho + 1))); + s->sprite_delta[0][0] = (-r * sprite_ref[0][0] + virtual_ref[0][0]); + s->sprite_delta[0][1] = (+r * sprite_ref[0][1] - virtual_ref[0][1]); + s->sprite_delta[1][0] = (-r * sprite_ref[0][1] + virtual_ref[0][1]); + s->sprite_delta[1][1] = (-r * sprite_ref[0][0] + virtual_ref[0][0]); + + s->sprite_shift[0] = alpha + rho; + s->sprite_shift[1] = alpha + rho + 2; + break; + case 3: + min_ab = FFMIN(alpha, beta); + w3 = w2 >> min_ab; + h3 = h2 >> min_ab; + s->sprite_offset[0][0] = (sprite_ref[0][0] << (alpha + beta + rho - min_ab)) + + (-r * sprite_ref[0][0] + virtual_ref[0][0]) * + h3 * (-vop_ref[0][0]) + + (-r * sprite_ref[0][0] + virtual_ref[1][0]) * + w3 * (-vop_ref[0][1]) + + (1 << (alpha + beta + rho - min_ab - 1)); + s->sprite_offset[0][1] = (sprite_ref[0][1] << (alpha + beta + rho - min_ab)) + + (-r * sprite_ref[0][1] + virtual_ref[0][1]) * + h3 * (-vop_ref[0][0]) + + (-r * sprite_ref[0][1] + virtual_ref[1][1]) * + w3 * (-vop_ref[0][1]) + + (1 << (alpha + beta + rho - min_ab - 1)); + s->sprite_offset[1][0] = (-r * sprite_ref[0][0] + virtual_ref[0][0]) * + h3 * (-2 * vop_ref[0][0] + 1) + + (-r * sprite_ref[0][0] + virtual_ref[1][0]) * + w3 * (-2 * vop_ref[0][1] + 1) + 2 * w2 * h3 * + r * sprite_ref[0][0] - 16 * w2 * h3 + + (1 << (alpha + beta + rho - min_ab + 1)); + s->sprite_offset[1][1] = (-r * sprite_ref[0][1] + virtual_ref[0][1]) * + h3 * (-2 * vop_ref[0][0] + 1) + + (-r * sprite_ref[0][1] + virtual_ref[1][1]) * + w3 * (-2 * vop_ref[0][1] + 1) + 2 * w2 * h3 * + r * sprite_ref[0][1] - 16 * w2 * h3 + + (1 << (alpha + beta + rho - min_ab + 1)); + s->sprite_delta[0][0] = (-r * sprite_ref[0][0] + virtual_ref[0][0]) * h3; + s->sprite_delta[0][1] = (-r * sprite_ref[0][0] + virtual_ref[1][0]) * w3; + s->sprite_delta[1][0] = (-r * sprite_ref[0][1] + virtual_ref[0][1]) * h3; + s->sprite_delta[1][1] = (-r * sprite_ref[0][1] + virtual_ref[1][1]) * w3; + + s->sprite_shift[0] = alpha + beta + rho - min_ab; + s->sprite_shift[1] = alpha + beta + rho - min_ab + 2; + break; } /* try to simplify the situation */ - if( s->sprite_delta[0][0] == a<<s->sprite_shift[0] - && s->sprite_delta[0][1] == 0 - && s->sprite_delta[1][0] == 0 - && s->sprite_delta[1][1] == a<<s->sprite_shift[0]) - { - s->sprite_offset[0][0]>>=s->sprite_shift[0]; - s->sprite_offset[0][1]>>=s->sprite_shift[0]; - s->sprite_offset[1][0]>>=s->sprite_shift[1]; - s->sprite_offset[1][1]>>=s->sprite_shift[1]; - s->sprite_delta[0][0]= a; - s->sprite_delta[0][1]= 0; - s->sprite_delta[1][0]= 0; - s->sprite_delta[1][1]= a; - s->sprite_shift[0]= 0; - s->sprite_shift[1]= 0; - s->real_sprite_warping_points=1; - } - else{ - int shift_y= 16 - s->sprite_shift[0]; - int shift_c= 16 - s->sprite_shift[1]; - for(i=0; i<2; i++){ - s->sprite_offset[0][i]<<= shift_y; - s->sprite_offset[1][i]<<= shift_c; - s->sprite_delta[0][i]<<= shift_y; - s->sprite_delta[1][i]<<= shift_y; - s->sprite_shift[i]= 16; + if (s->sprite_delta[0][0] == a << s->sprite_shift[0] && + s->sprite_delta[0][1] == 0 && + s->sprite_delta[1][0] == 0 && + s->sprite_delta[1][1] == a << s->sprite_shift[0]) { + s->sprite_offset[0][0] >>= s->sprite_shift[0]; + s->sprite_offset[0][1] >>= s->sprite_shift[0]; + s->sprite_offset[1][0] >>= s->sprite_shift[1]; + s->sprite_offset[1][1] >>= s->sprite_shift[1]; + s->sprite_delta[0][0] = a; + s->sprite_delta[0][1] = 0; + s->sprite_delta[1][0] = 0; + s->sprite_delta[1][1] = a; + s->sprite_shift[0] = 0; + s->sprite_shift[1] = 0; + s->real_sprite_warping_points = 1; + } else { + int shift_y = 16 - s->sprite_shift[0]; + int shift_c = 16 - s->sprite_shift[1]; + for (i = 0; i < 2; i++) { + s->sprite_offset[0][i] <<= shift_y; + s->sprite_offset[1][i] <<= shift_c; + s->sprite_delta[0][i] <<= shift_y; + s->sprite_delta[1][i] <<= shift_y; + s->sprite_shift[i] = 16; } - s->real_sprite_warping_points= s->num_sprite_warping_points; + s->real_sprite_warping_points = s->num_sprite_warping_points; } + return 0; } @@ -354,94 +370,99 @@ static int mpeg4_decode_sprite_trajectory(MpegEncContext *s, GetBitContext *gb) */ int ff_mpeg4_decode_video_packet_header(MpegEncContext *s) { - int mb_num_bits= av_log2(s->mb_num - 1) + 1; - int header_extension=0, mb_num, len; + int mb_num_bits = av_log2(s->mb_num - 1) + 1; + int header_extension = 0, mb_num, len; /* is there enough space left for a video packet + header */ - if( get_bits_count(&s->gb) > s->gb.size_in_bits-20) return -1; + if (get_bits_count(&s->gb) > s->gb.size_in_bits - 20) + return -1; - for(len=0; len<32; len++){ - if(get_bits1(&s->gb)) break; - } + for (len = 0; len < 32; len++) + if (get_bits1(&s->gb)) + break; - if(len!=ff_mpeg4_get_video_packet_prefix_length(s)){ + if (len != ff_mpeg4_get_video_packet_prefix_length(s)) { av_log(s->avctx, AV_LOG_ERROR, "marker does not match f_code\n"); return -1; } - if(s->shape != RECT_SHAPE){ - header_extension= get_bits1(&s->gb); - //FIXME more stuff here + if (s->shape != RECT_SHAPE) { + header_extension = get_bits1(&s->gb); + // FIXME more stuff here } - mb_num= get_bits(&s->gb, mb_num_bits); - if(mb_num>=s->mb_num){ - av_log(s->avctx, AV_LOG_ERROR, "illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num); + mb_num = get_bits(&s->gb, mb_num_bits); + if (mb_num >= s->mb_num) { + av_log(s->avctx, AV_LOG_ERROR, + "illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num); return -1; } - if(s->pict_type == AV_PICTURE_TYPE_B){ + if (s->pict_type == AV_PICTURE_TYPE_B) { int mb_x = 0, mb_y = 0; while (s->next_picture.mbskip_table[s->mb_index2xy[mb_num]]) { if (!mb_x) ff_thread_await_progress(&s->next_picture_ptr->tf, mb_y++, 0); mb_num++; - if (++mb_x == s->mb_width) mb_x = 0; + if (++mb_x == s->mb_width) + mb_x = 0; } - if(mb_num >= s->mb_num) return -1; // slice contains just skipped MBs which where already decoded + if (mb_num >= s->mb_num) + return -1; // slice contains just skipped MBs (already decoded) } - s->mb_x= mb_num % s->mb_width; - s->mb_y= mb_num / s->mb_width; + s->mb_x = mb_num % s->mb_width; + s->mb_y = mb_num / s->mb_width; - if(s->shape != BIN_ONLY_SHAPE){ - int qscale= get_bits(&s->gb, s->quant_precision); - if(qscale) - s->chroma_qscale=s->qscale= qscale; + if (s->shape != BIN_ONLY_SHAPE) { + int qscale = get_bits(&s->gb, s->quant_precision); + if (qscale) + s->chroma_qscale = s->qscale = qscale; } - if(s->shape == RECT_SHAPE){ - header_extension= get_bits1(&s->gb); - } - if(header_extension){ - int time_incr=0; + if (s->shape == RECT_SHAPE) + header_extension = get_bits1(&s->gb); + + if (header_extension) { + int time_incr = 0; while (get_bits1(&s->gb) != 0) time_incr++; check_marker(&s->gb, "before time_increment in video packed header"); - skip_bits(&s->gb, s->time_increment_bits); /* time_increment */ + skip_bits(&s->gb, s->time_increment_bits); /* time_increment */ check_marker(&s->gb, "before vop_coding_type in video packed header"); skip_bits(&s->gb, 2); /* vop coding type */ - //FIXME not rect stuff here + // FIXME not rect stuff here - if(s->shape != BIN_ONLY_SHAPE){ + if (s->shape != BIN_ONLY_SHAPE) { skip_bits(&s->gb, 3); /* intra dc vlc threshold */ -//FIXME don't just ignore everything - if(s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ + // FIXME don't just ignore everything + if (s->pict_type == AV_PICTURE_TYPE_S && + s->vol_sprite_usage == GMC_SPRITE) { if (mpeg4_decode_sprite_trajectory(s, &s->gb) < 0) return AVERROR_INVALIDDATA; av_log(s->avctx, AV_LOG_ERROR, "untested\n"); } - //FIXME reduced res stuff here + // FIXME reduced res stuff here if (s->pict_type != AV_PICTURE_TYPE_I) { int f_code = get_bits(&s->gb, 3); /* fcode_for */ - if(f_code==0){ - av_log(s->avctx, AV_LOG_ERROR, "Error, video packet header damaged (f_code=0)\n"); - } + if (f_code == 0) + av_log(s->avctx, AV_LOG_ERROR, + "Error, video packet header damaged (f_code=0)\n"); } if (s->pict_type == AV_PICTURE_TYPE_B) { int b_code = get_bits(&s->gb, 3); - if(b_code==0){ - av_log(s->avctx, AV_LOG_ERROR, "Error, video packet header damaged (b_code=0)\n"); - } + if (b_code == 0) + av_log(s->avctx, AV_LOG_ERROR, + "Error, video packet header damaged (b_code=0)\n"); } } } - //FIXME new-pred stuff + // FIXME new-pred stuff return 0; } @@ -451,43 +472,48 @@ int ff_mpeg4_decode_video_packet_header(MpegEncContext *s) * @param n either 0 for the x component or 1 for y * @return the average MV for a GMC MB */ -static inline int get_amv(MpegEncContext *s, int n){ +static inline int get_amv(MpegEncContext *s, int n) +{ int x, y, mb_v, sum, dx, dy, shift; - int len = 1 << (s->f_code + 4); - const int a= s->sprite_warping_accuracy; + int len = 1 << (s->f_code + 4); + const int a = s->sprite_warping_accuracy; - if(s->workaround_bugs & FF_BUG_AMV) + if (s->workaround_bugs & FF_BUG_AMV) len >>= s->quarter_sample; - if(s->real_sprite_warping_points==1){ - if(s->divx_version==500 && s->divx_build==413) - sum= s->sprite_offset[0][n] / (1<<(a - s->quarter_sample)); + if (s->real_sprite_warping_points == 1) { + if (s->divx_version == 500 && s->divx_build == 413) + sum = s->sprite_offset[0][n] / (1 << (a - s->quarter_sample)); + else + sum = RSHIFT(s->sprite_offset[0][n] << s->quarter_sample, a); + } else { + dx = s->sprite_delta[n][0]; + dy = s->sprite_delta[n][1]; + shift = s->sprite_shift[0]; + if (n) + dy -= 1 << (shift + a + 1); else - sum= RSHIFT(s->sprite_offset[0][n]<<s->quarter_sample, a); - }else{ - dx= s->sprite_delta[n][0]; - dy= s->sprite_delta[n][1]; - shift= s->sprite_shift[0]; - if(n) dy -= 1<<(shift + a + 1); - else dx -= 1<<(shift + a + 1); - mb_v= s->sprite_offset[0][n] + dx*s->mb_x*16 + dy*s->mb_y*16; - - sum=0; - for(y=0; y<16; y++){ + dx -= 1 << (shift + a + 1); + mb_v = s->sprite_offset[0][n] + dx * s->mb_x * 16 + dy * s->mb_y * 16; + + sum = 0; + for (y = 0; y < 16; y++) { int v; - v= mb_v + dy*y; - //XXX FIXME optimize - for(x=0; x<16; x++){ - sum+= v>>shift; - v+= dx; + v = mb_v + dy * y; + // FIXME optimize + for (x = 0; x < 16; x++) { + sum += v >> shift; + v += dx; } } - sum= RSHIFT(sum, a+8-s->quarter_sample); + sum = RSHIFT(sum, a + 8 - s->quarter_sample); } - if (sum < -len) sum= -len; - else if (sum >= len) sum= len-1; + if (sum < -len) + sum = -len; + else if (sum >= len) + sum = len - 1; return sum; } @@ -498,7 +524,7 @@ static inline int get_amv(MpegEncContext *s, int n){ * @param dir_ptr the prediction direction will be stored here * @return the quantized dc */ -static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr) +static inline int mpeg4_decode_dc(MpegEncContext *s, int n, int *dir_ptr) { int level, code; @@ -506,29 +532,31 @@ static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr) code = get_vlc2(&s->gb, dc_lum.table, DC_VLC_BITS, 1); else code = get_vlc2(&s->gb, dc_chrom.table, DC_VLC_BITS, 1); - if (code < 0 || code > 9 /* && s->nbit<9 */){ + + if (code < 0 || code > 9 /* && s->nbit < 9 */) { av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n"); return -1; } + if (code == 0) { level = 0; } else { - if(IS_3IV1){ - if(code==1) - level= 2*get_bits1(&s->gb)-1; - else{ - if(get_bits1(&s->gb)) - level = get_bits(&s->gb, code-1) + (1<<(code-1)); + if (IS_3IV1) { + if (code == 1) + level = 2 * get_bits1(&s->gb) - 1; + else { + if (get_bits1(&s->gb)) + level = get_bits(&s->gb, code - 1) + (1 << (code - 1)); else - level = -get_bits(&s->gb, code-1) - (1<<(code-1)); + level = -get_bits(&s->gb, code - 1) - (1 << (code - 1)); } - }else{ + } else { level = get_xbits(&s->gb, code); } - if (code > 8){ - if(get_bits1(&s->gb)==0){ /* marker */ - if(s->err_recognition&AV_EF_BITSTREAM){ + if (code > 8) { + if (get_bits1(&s->gb) == 0) { /* marker */ + if (s->err_recognition & AV_EF_BITSTREAM) { av_log(s->avctx, AV_LOG_ERROR, "dc marker bit missing\n"); return -1; } @@ -543,124 +571,144 @@ static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr) * Decode first partition. * @return number of MBs decoded or <0 if an error occurred */ -static int mpeg4_decode_partition_a(MpegEncContext *s){ - int mb_num; +static int mpeg4_decode_partition_a(MpegEncContext *s) +{ + int mb_num = 0; static const int8_t quant_tab[4] = { -1, -2, 1, 2 }; /* decode first partition */ - mb_num=0; - s->first_slice_line=1; - for(; s->mb_y<s->mb_height; s->mb_y++){ + s->first_slice_line = 1; + for (; s->mb_y < s->mb_height; s->mb_y++) { ff_init_block_index(s); - for(; s->mb_x<s->mb_width; s->mb_x++){ - const int xy= s->mb_x + s->mb_y*s->mb_stride; + for (; s->mb_x < s->mb_width; s->mb_x++) { + const int xy = s->mb_x + s->mb_y * s->mb_stride; int cbpc; - int dir=0; + int dir = 0; mb_num++; ff_update_block_index(s); - if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1) - s->first_slice_line=0; + if (s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y + 1) + s->first_slice_line = 0; - if(s->pict_type==AV_PICTURE_TYPE_I){ + if (s->pict_type == AV_PICTURE_TYPE_I) { int i; - do{ - if(show_bits_long(&s->gb, 19)==DC_MARKER){ - return mb_num-1; - } + do { + if (show_bits_long(&s->gb, 19) == DC_MARKER) + return mb_num - 1; cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2); - if (cbpc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y); + if (cbpc < 0) { + av_log(s->avctx, AV_LOG_ERROR, + "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y); return -1; } - }while(cbpc == 8); + } while (cbpc == 8); - s->cbp_table[xy]= cbpc & 3; + s->cbp_table[xy] = cbpc & 3; s->current_picture.mb_type[xy] = MB_TYPE_INTRA; - s->mb_intra = 1; + s->mb_intra = 1; - if(cbpc & 4) { + if (cbpc & 4) ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); - } - s->current_picture.qscale_table[xy]= s->qscale; - s->mbintra_table[xy]= 1; - for(i=0; i<6; i++){ + s->current_picture.qscale_table[xy] = s->qscale; + + s->mbintra_table[xy] = 1; + for (i = 0; i < 6; i++) { int dc_pred_dir; - int dc= mpeg4_decode_dc(s, i, &dc_pred_dir); - if(dc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "DC corrupted at %d %d\n", s->mb_x, s->mb_y); + int dc = mpeg4_decode_dc(s, i, &dc_pred_dir); + if (dc < 0) { + av_log(s->avctx, AV_LOG_ERROR, + "DC corrupted at %d %d\n", s->mb_x, s->mb_y); return -1; } - dir<<=1; - if(dc_pred_dir) dir|=1; + dir <<= 1; + if (dc_pred_dir) + dir |= 1; } - s->pred_dir_table[xy]= dir; - }else{ /* P/S_TYPE */ + s->pred_dir_table[xy] = dir; + } else { /* P/S_TYPE */ int mx, my, pred_x, pred_y, bits; - int16_t * const mot_val = s->current_picture.motion_val[0][s->block_index[0]]; - const int stride= s->b8_stride*2; + int16_t *const mot_val = s->current_picture.motion_val[0][s->block_index[0]]; + const int stride = s->b8_stride * 2; try_again: - bits= show_bits(&s->gb, 17); - if(bits==MOTION_MARKER){ - return mb_num-1; - } + bits = show_bits(&s->gb, 17); + if (bits == MOTION_MARKER) + return mb_num - 1; + skip_bits1(&s->gb); - if(bits&0x10000){ + if (bits & 0x10000) { /* skip mb */ - if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ - s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_GMC | MB_TYPE_L0; - mx= get_amv(s, 0); - my= get_amv(s, 1); - }else{ - s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; - mx=my=0; + if (s->pict_type == AV_PICTURE_TYPE_S && + s->vol_sprite_usage == GMC_SPRITE) { + s->current_picture.mb_type[xy] = MB_TYPE_SKIP | + MB_TYPE_16x16 | + MB_TYPE_GMC | + MB_TYPE_L0; + mx = get_amv(s, 0); + my = get_amv(s, 1); + } else { + s->current_picture.mb_type[xy] = MB_TYPE_SKIP | + MB_TYPE_16x16 | + MB_TYPE_L0; + mx = my = 0; } - mot_val[0 ]= mot_val[2 ]= - mot_val[0+stride]= mot_val[2+stride]= mx; - mot_val[1 ]= mot_val[3 ]= - mot_val[1+stride]= mot_val[3+stride]= my; - - if(s->mbintra_table[xy]) + mot_val[0] = + mot_val[2] = + mot_val[0 + stride] = + mot_val[2 + stride] = mx; + mot_val[1] = + mot_val[3] = + mot_val[1 + stride] = + mot_val[3 + stride] = my; + + if (s->mbintra_table[xy]) ff_clean_intra_table_entries(s); continue; } cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); - if (cbpc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y); + if (cbpc < 0) { + av_log(s->avctx, AV_LOG_ERROR, + "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y); return -1; } - if(cbpc == 20) + if (cbpc == 20) goto try_again; - s->cbp_table[xy]= cbpc&(8+3); //8 is dquant + s->cbp_table[xy] = cbpc & (8 + 3); // 8 is dquant s->mb_intra = ((cbpc & 4) != 0); - if(s->mb_intra){ + if (s->mb_intra) { s->current_picture.mb_type[xy] = MB_TYPE_INTRA; - s->mbintra_table[xy]= 1; - mot_val[0 ]= mot_val[2 ]= - mot_val[0+stride]= mot_val[2+stride]= 0; - mot_val[1 ]= mot_val[3 ]= - mot_val[1+stride]= mot_val[3+stride]= 0; - }else{ - if(s->mbintra_table[xy]) + s->mbintra_table[xy] = 1; + mot_val[0] = + mot_val[2] = + mot_val[0 + stride] = + mot_val[2 + stride] = 0; + mot_val[1] = + mot_val[3] = + mot_val[1 + stride] = + mot_val[3 + stride] = 0; + } else { + if (s->mbintra_table[xy]) ff_clean_intra_table_entries(s); - if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0) - s->mcsel= get_bits1(&s->gb); - else s->mcsel= 0; + if (s->pict_type == AV_PICTURE_TYPE_S && + s->vol_sprite_usage == GMC_SPRITE && + (cbpc & 16) == 0) + s->mcsel = get_bits1(&s->gb); + else + s->mcsel = 0; if ((cbpc & 16) == 0) { /* 16x16 motion prediction */ ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); - if(!s->mcsel){ + if (!s->mcsel) { mx = ff_h263_decode_motion(s, pred_x, s->f_code); if (mx >= 0xffff) return -1; @@ -668,22 +716,30 @@ try_again: my = ff_h263_decode_motion(s, pred_y, s->f_code); if (my >= 0xffff) return -1; - s->current_picture.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0; + s->current_picture.mb_type[xy] = MB_TYPE_16x16 | + MB_TYPE_L0; } else { mx = get_amv(s, 0); my = get_amv(s, 1); - s->current_picture.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_GMC | MB_TYPE_L0; + s->current_picture.mb_type[xy] = MB_TYPE_16x16 | + MB_TYPE_GMC | + MB_TYPE_L0; } - mot_val[0 ]= mot_val[2 ] = - mot_val[0+stride]= mot_val[2+stride]= mx; - mot_val[1 ]= mot_val[3 ]= - mot_val[1+stride]= mot_val[3+stride]= my; + mot_val[0] = + mot_val[2] = + mot_val[0 + stride] = + mot_val[2 + stride] = mx; + mot_val[1] = + mot_val[3] = + mot_val[1 + stride] = + mot_val[3 + stride] = my; } else { int i; - s->current_picture.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0; - for(i=0;i<4;i++) { - int16_t *mot_val= ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y); + s->current_picture.mb_type[xy] = MB_TYPE_8x8 | + MB_TYPE_L0; + for (i = 0; i < 4; i++) { + int16_t *mot_val = ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y); mx = ff_h263_decode_motion(s, pred_x, s->f_code); if (mx >= 0xffff) return -1; @@ -698,7 +754,7 @@ try_again: } } } - s->mb_x= 0; + s->mb_x = 0; } return mb_num; @@ -708,85 +764,91 @@ try_again: * decode second partition. * @return <0 if an error occurred */ -static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count){ - int mb_num=0; +static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count) +{ + int mb_num = 0; static const int8_t quant_tab[4] = { -1, -2, 1, 2 }; - s->mb_x= s->resync_mb_x; - s->first_slice_line=1; - for(s->mb_y= s->resync_mb_y; mb_num < mb_count; s->mb_y++){ + s->mb_x = s->resync_mb_x; + s->first_slice_line = 1; + for (s->mb_y = s->resync_mb_y; mb_num < mb_count; s->mb_y++) { ff_init_block_index(s); - for(; mb_num < mb_count && s->mb_x<s->mb_width; s->mb_x++){ - const int xy= s->mb_x + s->mb_y*s->mb_stride; + for (; mb_num < mb_count && s->mb_x < s->mb_width; s->mb_x++) { + const int xy = s->mb_x + s->mb_y * s->mb_stride; mb_num++; ff_update_block_index(s); - if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1) - s->first_slice_line=0; - - if(s->pict_type==AV_PICTURE_TYPE_I){ - int ac_pred= get_bits1(&s->gb); - int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); - if(cbpy<0){ - av_log(s->avctx, AV_LOG_ERROR, "cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); + if (s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y + 1) + s->first_slice_line = 0; + + if (s->pict_type == AV_PICTURE_TYPE_I) { + int ac_pred = get_bits1(&s->gb); + int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); + if (cbpy < 0) { + av_log(s->avctx, AV_LOG_ERROR, + "cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); return -1; } - s->cbp_table[xy]|= cbpy<<2; - s->current_picture.mb_type[xy] |= ac_pred*MB_TYPE_ACPRED; - }else{ /* P || S_TYPE */ + s->cbp_table[xy] |= cbpy << 2; + s->current_picture.mb_type[xy] |= ac_pred * MB_TYPE_ACPRED; + } else { /* P || S_TYPE */ if (IS_INTRA(s->current_picture.mb_type[xy])) { - int dir=0,i; + int i; + int dir = 0; int ac_pred = get_bits1(&s->gb); - int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); + int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); - if(cbpy<0){ - av_log(s->avctx, AV_LOG_ERROR, "I cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); + if (cbpy < 0) { + av_log(s->avctx, AV_LOG_ERROR, + "I cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); return -1; } - if(s->cbp_table[xy] & 8) { + if (s->cbp_table[xy] & 8) ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); - } s->current_picture.qscale_table[xy] = s->qscale; - for(i=0; i<6; i++){ + for (i = 0; i < 6; i++) { int dc_pred_dir; - int dc= mpeg4_decode_dc(s, i, &dc_pred_dir); - if(dc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "DC corrupted at %d %d\n", s->mb_x, s->mb_y); + int dc = mpeg4_decode_dc(s, i, &dc_pred_dir); + if (dc < 0) { + av_log(s->avctx, AV_LOG_ERROR, + "DC corrupted at %d %d\n", s->mb_x, s->mb_y); return -1; } - dir<<=1; - if(dc_pred_dir) dir|=1; + dir <<= 1; + if (dc_pred_dir) + dir |= 1; } - s->cbp_table[xy]&= 3; //remove dquant - s->cbp_table[xy]|= cbpy<<2; - s->current_picture.mb_type[xy] |= ac_pred*MB_TYPE_ACPRED; - s->pred_dir_table[xy]= dir; + s->cbp_table[xy] &= 3; // remove dquant + s->cbp_table[xy] |= cbpy << 2; + s->current_picture.mb_type[xy] |= ac_pred * MB_TYPE_ACPRED; + s->pred_dir_table[xy] = dir; } else if (IS_SKIP(s->current_picture.mb_type[xy])) { s->current_picture.qscale_table[xy] = s->qscale; - s->cbp_table[xy]= 0; - }else{ + s->cbp_table[xy] = 0; + } else { int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); - if(cbpy<0){ - av_log(s->avctx, AV_LOG_ERROR, "P cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); + if (cbpy < 0) { + av_log(s->avctx, AV_LOG_ERROR, + "P cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); return -1; } - if(s->cbp_table[xy] & 8) { + if (s->cbp_table[xy] & 8) ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); - } s->current_picture.qscale_table[xy] = s->qscale; - s->cbp_table[xy]&= 3; //remove dquant - s->cbp_table[xy]|= (cbpy^0xf)<<2; + s->cbp_table[xy] &= 3; // remove dquant + s->cbp_table[xy] |= (cbpy ^ 0xf) << 2; } } } - if(mb_num >= mb_count) return 0; - s->mb_x= 0; + if (mb_num >= mb_count) + return 0; + s->mb_x = 0; } return 0; } @@ -798,47 +860,56 @@ static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count){ int ff_mpeg4_decode_partitions(MpegEncContext *s) { int mb_num; - const int part_a_error= s->pict_type==AV_PICTURE_TYPE_I ? (ER_DC_ERROR|ER_MV_ERROR) : ER_MV_ERROR; - const int part_a_end = s->pict_type==AV_PICTURE_TYPE_I ? (ER_DC_END |ER_MV_END) : ER_MV_END; + const int part_a_error = s->pict_type == AV_PICTURE_TYPE_I ? (ER_DC_ERROR | ER_MV_ERROR) : ER_MV_ERROR; + const int part_a_end = s->pict_type == AV_PICTURE_TYPE_I ? (ER_DC_END | ER_MV_END) : ER_MV_END; - mb_num= mpeg4_decode_partition_a(s); - if(mb_num<0){ - ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, part_a_error); + mb_num = mpeg4_decode_partition_a(s); + if (mb_num < 0) { + ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, + s->mb_x, s->mb_y, part_a_error); return -1; } - if(s->resync_mb_x + s->resync_mb_y*s->mb_width + mb_num > s->mb_num){ + if (s->resync_mb_x + s->resync_mb_y * s->mb_width + mb_num > s->mb_num) { av_log(s->avctx, AV_LOG_ERROR, "slice below monitor ...\n"); - ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, part_a_error); + ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, + s->mb_x, s->mb_y, part_a_error); return -1; } - s->mb_num_left= mb_num; + s->mb_num_left = mb_num; - if(s->pict_type==AV_PICTURE_TYPE_I){ - while(show_bits(&s->gb, 9) == 1) + if (s->pict_type == AV_PICTURE_TYPE_I) { + while (show_bits(&s->gb, 9) == 1) skip_bits(&s->gb, 9); - if(get_bits_long(&s->gb, 19)!=DC_MARKER){ - av_log(s->avctx, AV_LOG_ERROR, "marker missing after first I partition at %d %d\n", s->mb_x, s->mb_y); + if (get_bits_long(&s->gb, 19) != DC_MARKER) { + av_log(s->avctx, AV_LOG_ERROR, + "marker missing after first I partition at %d %d\n", + s->mb_x, s->mb_y); return -1; } - }else{ - while(show_bits(&s->gb, 10) == 1) + } else { + while (show_bits(&s->gb, 10) == 1) skip_bits(&s->gb, 10); - if(get_bits(&s->gb, 17)!=MOTION_MARKER){ - av_log(s->avctx, AV_LOG_ERROR, "marker missing after first P partition at %d %d\n", s->mb_x, s->mb_y); + if (get_bits(&s->gb, 17) != MOTION_MARKER) { + av_log(s->avctx, AV_LOG_ERROR, + "marker missing after first P partition at %d %d\n", + s->mb_x, s->mb_y); return -1; } } - ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, part_a_end); + ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, + s->mb_x - 1, s->mb_y, part_a_end); - if( mpeg4_decode_partition_b(s, mb_num) < 0){ - if(s->pict_type==AV_PICTURE_TYPE_P) - ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, ER_DC_ERROR); + if (mpeg4_decode_partition_b(s, mb_num) < 0) { + if (s->pict_type == AV_PICTURE_TYPE_P) + ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, + s->mb_x, s->mb_y, ER_DC_ERROR); return -1; - }else{ - if(s->pict_type==AV_PICTURE_TYPE_P) - ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_DC_END); + } else { + if (s->pict_type == AV_PICTURE_TYPE_P) + ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, + s->mb_x - 1, s->mb_y, ER_DC_END); } return 0; @@ -848,221 +919,241 @@ int ff_mpeg4_decode_partitions(MpegEncContext *s) * Decode a block. * @return <0 if an error occurred */ -static inline int mpeg4_decode_block(MpegEncContext * s, int16_t * block, - int n, int coded, int intra, int rvlc) +static inline int mpeg4_decode_block(MpegEncContext *s, int16_t *block, + int n, int coded, int intra, int rvlc) { - int level, i, last, run; - int dc_pred_dir; - RLTable * rl; - RL_VLC_ELEM * rl_vlc; - const uint8_t * scan_table; - int qmul, qadd; - - //Note intra & rvlc should be optimized away if this is inlined - - if(intra) { - if(s->use_intra_dc_vlc){ - /* DC coef */ - if(s->partitioned_frame){ - level = s->dc_val[0][ s->block_index[n] ]; - if(n<4) level= FASTDIV((level + (s->y_dc_scale>>1)), s->y_dc_scale); - else level= FASTDIV((level + (s->c_dc_scale>>1)), s->c_dc_scale); - dc_pred_dir= (s->pred_dir_table[s->mb_x + s->mb_y*s->mb_stride]<<n)&32; - }else{ - level = mpeg4_decode_dc(s, n, &dc_pred_dir); - if (level < 0) - return -1; - } - block[0] = level; - i = 0; - }else{ + int level, i, last, run, qmul, qadd, dc_pred_dir; + RLTable *rl; + RL_VLC_ELEM *rl_vlc; + const uint8_t *scan_table; + + // Note intra & rvlc should be optimized away if this is inlined + + if (intra) { + if (s->use_intra_dc_vlc) { + /* DC coef */ + if (s->partitioned_frame) { + level = s->dc_val[0][s->block_index[n]]; + if (n < 4) + level = FASTDIV((level + (s->y_dc_scale >> 1)), s->y_dc_scale); + else + level = FASTDIV((level + (s->c_dc_scale >> 1)), s->c_dc_scale); + dc_pred_dir = (s->pred_dir_table[s->mb_x + s->mb_y * s->mb_stride] << n) & 32; + } else { + level = mpeg4_decode_dc(s, n, &dc_pred_dir); + if (level < 0) + return -1; + } + block[0] = level; + i = 0; + } else { i = -1; ff_mpeg4_pred_dc(s, n, 0, &dc_pred_dir, 0); - } - if (!coded) - goto not_coded; - - if(rvlc){ - rl = &ff_rvlc_rl_intra; - rl_vlc = ff_rvlc_rl_intra.rl_vlc[0]; - }else{ - rl = &ff_mpeg4_rl_intra; - rl_vlc = ff_mpeg4_rl_intra.rl_vlc[0]; - } - if (s->ac_pred) { - if (dc_pred_dir == 0) - scan_table = s->intra_v_scantable.permutated; /* left */ - else - scan_table = s->intra_h_scantable.permutated; /* top */ - } else { + } + if (!coded) + goto not_coded; + + if (rvlc) { + rl = &ff_rvlc_rl_intra; + rl_vlc = ff_rvlc_rl_intra.rl_vlc[0]; + } else { + rl = &ff_mpeg4_rl_intra; + rl_vlc = ff_mpeg4_rl_intra.rl_vlc[0]; + } + if (s->ac_pred) { + if (dc_pred_dir == 0) + scan_table = s->intra_v_scantable.permutated; /* left */ + else + scan_table = s->intra_h_scantable.permutated; /* top */ + } else { scan_table = s->intra_scantable.permutated; - } - qmul=1; - qadd=0; + } + qmul = 1; + qadd = 0; } else { i = -1; if (!coded) { s->block_last_index[n] = i; return 0; } - if(rvlc) rl = &ff_rvlc_rl_inter; - else rl = &ff_h263_rl_inter; + if (rvlc) + rl = &ff_rvlc_rl_inter; + else + rl = &ff_h263_rl_inter; scan_table = s->intra_scantable.permutated; - if(s->mpeg_quant){ - qmul=1; - qadd=0; - if(rvlc){ + if (s->mpeg_quant) { + qmul = 1; + qadd = 0; + if (rvlc) rl_vlc = ff_rvlc_rl_inter.rl_vlc[0]; - }else{ + else rl_vlc = ff_h263_rl_inter.rl_vlc[0]; - } - }else{ + } else { qmul = s->qscale << 1; qadd = (s->qscale - 1) | 1; - if(rvlc){ + if (rvlc) rl_vlc = ff_rvlc_rl_inter.rl_vlc[s->qscale]; - }else{ + else rl_vlc = ff_h263_rl_inter.rl_vlc[s->qscale]; - } } } - { - OPEN_READER(re, &s->gb); - for(;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0); - if (level==0) { - /* escape */ - if(rvlc){ - if(SHOW_UBITS(re, &s->gb, 1)==0){ - av_log(s->avctx, AV_LOG_ERROR, "1. marker bit missing in rvlc esc\n"); - return -1; - }; SKIP_CACHE(re, &s->gb, 1); - - last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); - run= SHOW_UBITS(re, &s->gb, 6); - SKIP_COUNTER(re, &s->gb, 1+1+6); - UPDATE_CACHE(re, &s->gb); - - if(SHOW_UBITS(re, &s->gb, 1)==0){ - av_log(s->avctx, AV_LOG_ERROR, "2. marker bit missing in rvlc esc\n"); - return -1; - }; SKIP_CACHE(re, &s->gb, 1); - - level= SHOW_UBITS(re, &s->gb, 11); SKIP_CACHE(re, &s->gb, 11); - - if(SHOW_UBITS(re, &s->gb, 5)!=0x10){ - av_log(s->avctx, AV_LOG_ERROR, "reverse esc missing\n"); - return -1; - }; SKIP_CACHE(re, &s->gb, 5); + { + OPEN_READER(re, &s->gb); + for (;;) { + UPDATE_CACHE(re, &s->gb); + GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0); + if (level == 0) { + /* escape */ + if (rvlc) { + if (SHOW_UBITS(re, &s->gb, 1) == 0) { + av_log(s->avctx, AV_LOG_ERROR, + "1. marker bit missing in rvlc esc\n"); + return -1; + } + SKIP_CACHE(re, &s->gb, 1); - level= level * qmul + qadd; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - SKIP_COUNTER(re, &s->gb, 1+11+5+1); - - i+= run + 1; - if(last) i+=192; - }else{ - int cache; - cache= GET_CACHE(re, &s->gb); - - if(IS_3IV1) - cache ^= 0xC0000000; - - if (cache&0x80000000) { - if (cache&0x40000000) { - /* third escape */ - SKIP_CACHE(re, &s->gb, 2); - last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); - run= SHOW_UBITS(re, &s->gb, 6); - SKIP_COUNTER(re, &s->gb, 2+1+6); + last = SHOW_UBITS(re, &s->gb, 1); + SKIP_CACHE(re, &s->gb, 1); + run = SHOW_UBITS(re, &s->gb, 6); + SKIP_COUNTER(re, &s->gb, 1 + 1 + 6); UPDATE_CACHE(re, &s->gb); - if(IS_3IV1){ - level= SHOW_SBITS(re, &s->gb, 12); LAST_SKIP_BITS(re, &s->gb, 12); - }else{ - if(SHOW_UBITS(re, &s->gb, 1)==0){ - av_log(s->avctx, AV_LOG_ERROR, "1. marker bit missing in 3. esc\n"); - return -1; - }; SKIP_CACHE(re, &s->gb, 1); - - level= SHOW_SBITS(re, &s->gb, 12); SKIP_CACHE(re, &s->gb, 12); + if (SHOW_UBITS(re, &s->gb, 1) == 0) { + av_log(s->avctx, AV_LOG_ERROR, + "2. marker bit missing in rvlc esc\n"); + return -1; + } + SKIP_CACHE(re, &s->gb, 1); - if(SHOW_UBITS(re, &s->gb, 1)==0){ - av_log(s->avctx, AV_LOG_ERROR, "2. marker bit missing in 3. esc\n"); - return -1; - } + level = SHOW_UBITS(re, &s->gb, 11); + SKIP_CACHE(re, &s->gb, 11); - SKIP_COUNTER(re, &s->gb, 1+12+1); + if (SHOW_UBITS(re, &s->gb, 5) != 0x10) { + av_log(s->avctx, AV_LOG_ERROR, "reverse esc missing\n"); + return -1; } + SKIP_CACHE(re, &s->gb, 5); - if (level>0) level= level * qmul + qadd; - else level= level * qmul - qadd; + level = level * qmul + qadd; + level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); + SKIP_COUNTER(re, &s->gb, 1 + 11 + 5 + 1); - if((unsigned)(level + 2048) > 4095){ - if(s->err_recognition & AV_EF_BITSTREAM){ - if(level > 2560 || level<-2560){ - av_log(s->avctx, AV_LOG_ERROR, "|level| overflow in 3. esc, qp=%d\n", s->qscale); - return -1; + i += run + 1; + if (last) + i += 192; + } else { + int cache; + cache = GET_CACHE(re, &s->gb); + + if (IS_3IV1) + cache ^= 0xC0000000; + + if (cache & 0x80000000) { + if (cache & 0x40000000) { + /* third escape */ + SKIP_CACHE(re, &s->gb, 2); + last = SHOW_UBITS(re, &s->gb, 1); + SKIP_CACHE(re, &s->gb, 1); + run = SHOW_UBITS(re, &s->gb, 6); + SKIP_COUNTER(re, &s->gb, 2 + 1 + 6); + UPDATE_CACHE(re, &s->gb); + + if (IS_3IV1) { + level = SHOW_SBITS(re, &s->gb, 12); + LAST_SKIP_BITS(re, &s->gb, 12); + } else { + if (SHOW_UBITS(re, &s->gb, 1) == 0) { + av_log(s->avctx, AV_LOG_ERROR, + "1. marker bit missing in 3. esc\n"); + return -1; + } + SKIP_CACHE(re, &s->gb, 1); + + level = SHOW_SBITS(re, &s->gb, 12); + SKIP_CACHE(re, &s->gb, 12); + + if (SHOW_UBITS(re, &s->gb, 1) == 0) { + av_log(s->avctx, AV_LOG_ERROR, + "2. marker bit missing in 3. esc\n"); + return -1; + } + + SKIP_COUNTER(re, &s->gb, 1 + 12 + 1); } + + if (level > 0) + level = level * qmul + qadd; + else + level = level * qmul - qadd; + + if ((unsigned)(level + 2048) > 4095) { + if (s->err_recognition & AV_EF_BITSTREAM) { + if (level > 2560 || level < -2560) { + av_log(s->avctx, AV_LOG_ERROR, + "|level| overflow in 3. esc, qp=%d\n", + s->qscale); + return -1; + } + } + level = level < 0 ? -2048 : 2047; + } + + i += run + 1; + if (last) + i += 192; + } else { + /* second escape */ + SKIP_BITS(re, &s->gb, 2); + GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); + i += run + rl->max_run[run >> 7][level / qmul] + 1; // FIXME opt indexing + level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); + LAST_SKIP_BITS(re, &s->gb, 1); } - level= level<0 ? -2048 : 2047; + } else { + /* first escape */ + SKIP_BITS(re, &s->gb, 1); + GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); + i += run; + level = level + rl->max_level[run >> 7][(run - 1) & 63] * qmul; // FIXME opt indexing + level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); + LAST_SKIP_BITS(re, &s->gb, 1); } - - i+= run + 1; - if(last) i+=192; - } else { - /* second escape */ - SKIP_BITS(re, &s->gb, 2); - GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); - i+= run + rl->max_run[run>>7][level/qmul] +1; //FIXME opt indexing - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); } } else { - /* first escape */ - SKIP_BITS(re, &s->gb, 1); - GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); - i+= run; - level = level + rl->max_level[run>>7][(run-1)&63] * qmul;//FIXME opt indexing + i += run; level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); LAST_SKIP_BITS(re, &s->gb, 1); } - } - } else { - i+= run; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } - if (i > 62){ - i-= 192; - if(i&(~63)){ - av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; + if (i > 62) { + i -= 192; + if (i & (~63)) { + av_log(s->avctx, AV_LOG_ERROR, + "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); + return -1; + } + + block[scan_table[i]] = level; + break; } block[scan_table[i]] = level; - break; } - - block[scan_table[i]] = level; + CLOSE_READER(re, &s->gb); } - CLOSE_READER(re, &s->gb); - } - not_coded: + +not_coded: if (intra) { - if(!s->use_intra_dc_vlc){ + if (!s->use_intra_dc_vlc) { block[0] = ff_mpeg4_pred_dc(s, n, block[0], &dc_pred_dir, 0); - i -= i>>31; //if(i == -1) i=0; + i -= i >> 31; // if (i == -1) i = 0; } ff_mpeg4_pred_ac(s, block, n, dc_pred_dir); - if (s->ac_pred) { - i = 63; /* XXX: not optimal */ - } + if (s->ac_pred) + i = 63; // FIXME not optimal } s->block_last_index[n] = i; return 0; @@ -1075,20 +1166,20 @@ static inline int mpeg4_decode_block(MpegEncContext * s, int16_t * block, static int mpeg4_decode_partitioned_mb(MpegEncContext *s, int16_t block[6][64]) { int cbp, mb_type; - const int xy= s->mb_x + s->mb_y*s->mb_stride; + const int xy = s->mb_x + s->mb_y * s->mb_stride; mb_type = s->current_picture.mb_type[xy]; - cbp = s->cbp_table[xy]; + cbp = s->cbp_table[xy]; - s->use_intra_dc_vlc= s->qscale < s->intra_dc_threshold; + s->use_intra_dc_vlc = s->qscale < s->intra_dc_threshold; - if (s->current_picture.qscale_table[xy] != s->qscale) { + if (s->current_picture.qscale_table[xy] != s->qscale) ff_set_qscale(s, s->current_picture.qscale_table[xy]); - } - if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type==AV_PICTURE_TYPE_S) { + if (s->pict_type == AV_PICTURE_TYPE_P || + s->pict_type == AV_PICTURE_TYPE_S) { int i; - for(i=0; i<4; i++){ + for (i = 0; i < 4; i++) { s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0]; s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1]; } @@ -1096,21 +1187,22 @@ static int mpeg4_decode_partitioned_mb(MpegEncContext *s, int16_t block[6][64]) if (IS_SKIP(mb_type)) { /* skip mb */ - for(i=0;i<6;i++) + for (i = 0; i < 6; i++) s->block_last_index[i] = -1; - s->mv_dir = MV_DIR_FORWARD; + s->mv_dir = MV_DIR_FORWARD; s->mv_type = MV_TYPE_16X16; - if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ - s->mcsel=1; + if (s->pict_type == AV_PICTURE_TYPE_S + && s->vol_sprite_usage == GMC_SPRITE) { + s->mcsel = 1; s->mb_skipped = 0; - }else{ - s->mcsel=0; + } else { + s->mcsel = 0; s->mb_skipped = 1; } - }else if(s->mb_intra){ + } else if (s->mb_intra) { s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]); - }else if(!s->mb_intra){ -// s->mcsel= 0; //FIXME do we need to init that + } else if (!s->mb_intra) { + // s->mcsel = 0; // FIXME do we need to init that? s->mv_dir = MV_DIR_FORWARD; if (IS_8X8(mb_type)) { @@ -1121,7 +1213,7 @@ static int mpeg4_decode_partitioned_mb(MpegEncContext *s, int16_t block[6][64]) } } else { /* I-Frame */ s->mb_intra = 1; - s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]); + s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]); } if (!IS_SKIP(mb_type)) { @@ -1129,123 +1221,137 @@ static int mpeg4_decode_partitioned_mb(MpegEncContext *s, int16_t block[6][64]) s->dsp.clear_blocks(s->block[0]); /* decode each block */ for (i = 0; i < 6; i++) { - if(mpeg4_decode_block(s, block[i], i, cbp&32, s->mb_intra, s->rvlc) < 0){ - av_log(s->avctx, AV_LOG_ERROR, "texture corrupted at %d %d %d\n", s->mb_x, s->mb_y, s->mb_intra); + if (mpeg4_decode_block(s, block[i], i, cbp & 32, s->mb_intra, s->rvlc) < 0) { + av_log(s->avctx, AV_LOG_ERROR, + "texture corrupted at %d %d %d\n", + s->mb_x, s->mb_y, s->mb_intra); return -1; } - cbp+=cbp; + cbp += cbp; } } /* per-MB end of slice check */ - - if(--s->mb_num_left <= 0){ - if(mpeg4_is_resync(s)) + if (--s->mb_num_left <= 0) { + if (mpeg4_is_resync(s)) return SLICE_END; else return SLICE_NOEND; - }else{ - if(mpeg4_is_resync(s)){ - const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1; - if(s->cbp_table[xy+delta]) + } else { + if (mpeg4_is_resync(s)) { + const int delta = s->mb_x + 1 == s->mb_width ? 2 : 1; + if (s->cbp_table[xy + delta]) return SLICE_END; } return SLICE_OK; } } -static int mpeg4_decode_mb(MpegEncContext *s, - int16_t block[6][64]) +static int mpeg4_decode_mb(MpegEncContext *s, int16_t block[6][64]) { int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant; int16_t *mot_val; static int8_t quant_tab[4] = { -1, -2, 1, 2 }; - const int xy= s->mb_x + s->mb_y * s->mb_stride; + const int xy = s->mb_x + s->mb_y * s->mb_stride; assert(s->h263_pred); - if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type==AV_PICTURE_TYPE_S) { - do{ + if (s->pict_type == AV_PICTURE_TYPE_P || + s->pict_type == AV_PICTURE_TYPE_S) { + do { if (get_bits1(&s->gb)) { /* skip mb */ s->mb_intra = 0; - for(i=0;i<6;i++) + for (i = 0; i < 6; i++) s->block_last_index[i] = -1; - s->mv_dir = MV_DIR_FORWARD; + s->mv_dir = MV_DIR_FORWARD; s->mv_type = MV_TYPE_16X16; - if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ - s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_GMC | MB_TYPE_16x16 | MB_TYPE_L0; - s->mcsel=1; - s->mv[0][0][0]= get_amv(s, 0); - s->mv[0][0][1]= get_amv(s, 1); - - s->mb_skipped = 0; - }else{ - s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; - s->mcsel=0; + if (s->pict_type == AV_PICTURE_TYPE_S && + s->vol_sprite_usage == GMC_SPRITE) { + s->current_picture.mb_type[xy] = MB_TYPE_SKIP | + MB_TYPE_GMC | + MB_TYPE_16x16 | + MB_TYPE_L0; + s->mcsel = 1; + s->mv[0][0][0] = get_amv(s, 0); + s->mv[0][0][1] = get_amv(s, 1); + s->mb_skipped = 0; + } else { + s->current_picture.mb_type[xy] = MB_TYPE_SKIP | + MB_TYPE_16x16 | + MB_TYPE_L0; + s->mcsel = 0; s->mv[0][0][0] = 0; s->mv[0][0][1] = 0; - s->mb_skipped = 1; + s->mb_skipped = 1; } goto end; } cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); - if (cbpc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "cbpc damaged at %d %d\n", s->mb_x, s->mb_y); + if (cbpc < 0) { + av_log(s->avctx, AV_LOG_ERROR, + "cbpc damaged at %d %d\n", s->mb_x, s->mb_y); return -1; } - }while(cbpc == 20); + } while (cbpc == 20); s->dsp.clear_blocks(s->block[0]); - dquant = cbpc & 8; + dquant = cbpc & 8; s->mb_intra = ((cbpc & 4) != 0); - if (s->mb_intra) goto intra; + if (s->mb_intra) + goto intra; - if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0) - s->mcsel= get_bits1(&s->gb); - else s->mcsel= 0; + if (s->pict_type == AV_PICTURE_TYPE_S && + s->vol_sprite_usage == GMC_SPRITE && (cbpc & 16) == 0) + s->mcsel = get_bits1(&s->gb); + else + s->mcsel = 0; cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1) ^ 0x0F; cbp = (cbpc & 3) | (cbpy << 2); - if (dquant) { + if (dquant) ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); - } - if((!s->progressive_sequence) && (cbp || (s->workaround_bugs&FF_BUG_XVID_ILACE))) - s->interlaced_dct= get_bits1(&s->gb); + if ((!s->progressive_sequence) && + (cbp || (s->workaround_bugs & FF_BUG_XVID_ILACE))) + s->interlaced_dct = get_bits1(&s->gb); s->mv_dir = MV_DIR_FORWARD; if ((cbpc & 16) == 0) { - if(s->mcsel){ - s->current_picture.mb_type[xy] = MB_TYPE_GMC | MB_TYPE_16x16 | MB_TYPE_L0; + if (s->mcsel) { + s->current_picture.mb_type[xy] = MB_TYPE_GMC | + MB_TYPE_16x16 | + MB_TYPE_L0; /* 16x16 global motion prediction */ - s->mv_type = MV_TYPE_16X16; - mx= get_amv(s, 0); - my= get_amv(s, 1); + s->mv_type = MV_TYPE_16X16; + mx = get_amv(s, 0); + my = get_amv(s, 1); s->mv[0][0][0] = mx; s->mv[0][0][1] = my; - }else if((!s->progressive_sequence) && get_bits1(&s->gb)){ - s->current_picture.mb_type[xy] = MB_TYPE_16x8 | MB_TYPE_L0 | MB_TYPE_INTERLACED; + } else if ((!s->progressive_sequence) && get_bits1(&s->gb)) { + s->current_picture.mb_type[xy] = MB_TYPE_16x8 | + MB_TYPE_L0 | + MB_TYPE_INTERLACED; /* 16x8 field motion prediction */ - s->mv_type= MV_TYPE_FIELD; + s->mv_type = MV_TYPE_FIELD; - s->field_select[0][0]= get_bits1(&s->gb); - s->field_select[0][1]= get_bits1(&s->gb); + s->field_select[0][0] = get_bits1(&s->gb); + s->field_select[0][1] = get_bits1(&s->gb); ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); - for(i=0; i<2; i++){ + for (i = 0; i < 2; i++) { mx = ff_h263_decode_motion(s, pred_x, s->f_code); if (mx >= 0xffff) return -1; - my = ff_h263_decode_motion(s, pred_y/2, s->f_code); + my = ff_h263_decode_motion(s, pred_y / 2, s->f_code); if (my >= 0xffff) return -1; s->mv[0][i][0] = mx; s->mv[0][i][1] = my; } - }else{ + } else { s->current_picture.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0; /* 16x16 motion prediction */ s->mv_type = MV_TYPE_16X16; @@ -1264,10 +1370,10 @@ static int mpeg4_decode_mb(MpegEncContext *s, } } else { s->current_picture.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0; - s->mv_type = MV_TYPE_8X8; - for(i=0;i<4;i++) { + s->mv_type = MV_TYPE_8X8; + for (i = 0; i < 4; i++) { mot_val = ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y); - mx = ff_h263_decode_motion(s, pred_x, s->f_code); + mx = ff_h263_decode_motion(s, pred_x, s->f_code); if (mx >= 0xffff) return -1; @@ -1276,213 +1382,233 @@ static int mpeg4_decode_mb(MpegEncContext *s, return -1; s->mv[0][i][0] = mx; s->mv[0][i][1] = my; - mot_val[0] = mx; - mot_val[1] = my; + mot_val[0] = mx; + mot_val[1] = my; } } - } else if(s->pict_type==AV_PICTURE_TYPE_B) { - int modb1; // first bit of modb - int modb2; // second bit of modb + } else if (s->pict_type == AV_PICTURE_TYPE_B) { + int modb1; // first bit of modb + int modb2; // second bit of modb int mb_type; - s->mb_intra = 0; //B-frames never contain intra blocks - s->mcsel=0; // ... true gmc blocks + s->mb_intra = 0; // B-frames never contain intra blocks + s->mcsel = 0; // ... true gmc blocks - if(s->mb_x==0){ - for(i=0; i<2; i++){ - s->last_mv[i][0][0]= - s->last_mv[i][0][1]= - s->last_mv[i][1][0]= - s->last_mv[i][1][1]= 0; + if (s->mb_x == 0) { + for (i = 0; i < 2; i++) { + s->last_mv[i][0][0] = + s->last_mv[i][0][1] = + s->last_mv[i][1][0] = + s->last_mv[i][1][1] = 0; } ff_thread_await_progress(&s->next_picture_ptr->tf, s->mb_y, 0); } /* if we skipped it in the future P Frame than skip it now too */ - s->mb_skipped = s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]; // Note, skiptab=0 if last was GMC + s->mb_skipped = s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]; // Note, skiptab=0 if last was GMC - if(s->mb_skipped){ - /* skip mb */ - for(i=0;i<6;i++) + if (s->mb_skipped) { + /* skip mb */ + for (i = 0; i < 6; i++) s->block_last_index[i] = -1; - s->mv_dir = MV_DIR_FORWARD; - s->mv_type = MV_TYPE_16X16; - s->mv[0][0][0] = 0; - s->mv[0][0][1] = 0; - s->mv[1][0][0] = 0; + s->mv_dir = MV_DIR_FORWARD; + s->mv_type = MV_TYPE_16X16; + s->mv[0][0][0] = + s->mv[0][0][1] = + s->mv[1][0][0] = s->mv[1][0][1] = 0; - s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; + s->current_picture.mb_type[xy] = MB_TYPE_SKIP | + MB_TYPE_16x16 | + MB_TYPE_L0; goto end; } - modb1= get_bits1(&s->gb); - if(modb1){ - mb_type= MB_TYPE_DIRECT2 | MB_TYPE_SKIP | MB_TYPE_L0L1; //like MB_TYPE_B_DIRECT but no vectors coded - cbp=0; - }else{ - modb2= get_bits1(&s->gb); - mb_type= get_vlc2(&s->gb, mb_type_b_vlc.table, MB_TYPE_B_VLC_BITS, 1); - if(mb_type<0){ + modb1 = get_bits1(&s->gb); + if (modb1) { + // like MB_TYPE_B_DIRECT but no vectors coded + mb_type = MB_TYPE_DIRECT2 | MB_TYPE_SKIP | MB_TYPE_L0L1; + cbp = 0; + } else { + modb2 = get_bits1(&s->gb); + mb_type = get_vlc2(&s->gb, mb_type_b_vlc.table, MB_TYPE_B_VLC_BITS, 1); + if (mb_type < 0) { av_log(s->avctx, AV_LOG_ERROR, "illegal MB_type\n"); return -1; } - mb_type= mb_type_b_map[ mb_type ]; - if(modb2) cbp= 0; - else{ + mb_type = mb_type_b_map[mb_type]; + if (modb2) { + cbp = 0; + } else { s->dsp.clear_blocks(s->block[0]); - cbp= get_bits(&s->gb, 6); + cbp = get_bits(&s->gb, 6); } if ((!IS_DIRECT(mb_type)) && cbp) { - if(get_bits1(&s->gb)){ - ff_set_qscale(s, s->qscale + get_bits1(&s->gb)*4 - 2); - } + if (get_bits1(&s->gb)) + ff_set_qscale(s, s->qscale + get_bits1(&s->gb) * 4 - 2); } - if(!s->progressive_sequence){ - if(cbp) - s->interlaced_dct= get_bits1(&s->gb); + if (!s->progressive_sequence) { + if (cbp) + s->interlaced_dct = get_bits1(&s->gb); - if(!IS_DIRECT(mb_type) && get_bits1(&s->gb)){ + if (!IS_DIRECT(mb_type) && get_bits1(&s->gb)) { mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; mb_type &= ~MB_TYPE_16x16; - if(USES_LIST(mb_type, 0)){ - s->field_select[0][0]= get_bits1(&s->gb); - s->field_select[0][1]= get_bits1(&s->gb); + if (USES_LIST(mb_type, 0)) { + s->field_select[0][0] = get_bits1(&s->gb); + s->field_select[0][1] = get_bits1(&s->gb); } - if(USES_LIST(mb_type, 1)){ - s->field_select[1][0]= get_bits1(&s->gb); - s->field_select[1][1]= get_bits1(&s->gb); + if (USES_LIST(mb_type, 1)) { + s->field_select[1][0] = get_bits1(&s->gb); + s->field_select[1][1] = get_bits1(&s->gb); } } } s->mv_dir = 0; - if((mb_type & (MB_TYPE_DIRECT2|MB_TYPE_INTERLACED)) == 0){ - s->mv_type= MV_TYPE_16X16; + if ((mb_type & (MB_TYPE_DIRECT2 | MB_TYPE_INTERLACED)) == 0) { + s->mv_type = MV_TYPE_16X16; - if(USES_LIST(mb_type, 0)){ + if (USES_LIST(mb_type, 0)) { s->mv_dir = MV_DIR_FORWARD; mx = ff_h263_decode_motion(s, s->last_mv[0][0][0], s->f_code); my = ff_h263_decode_motion(s, s->last_mv[0][0][1], s->f_code); - s->last_mv[0][1][0]= s->last_mv[0][0][0]= s->mv[0][0][0] = mx; - s->last_mv[0][1][1]= s->last_mv[0][0][1]= s->mv[0][0][1] = my; + s->last_mv[0][1][0] = + s->last_mv[0][0][0] = + s->mv[0][0][0] = mx; + s->last_mv[0][1][1] = + s->last_mv[0][0][1] = + s->mv[0][0][1] = my; } - if(USES_LIST(mb_type, 1)){ + if (USES_LIST(mb_type, 1)) { s->mv_dir |= MV_DIR_BACKWARD; mx = ff_h263_decode_motion(s, s->last_mv[1][0][0], s->b_code); my = ff_h263_decode_motion(s, s->last_mv[1][0][1], s->b_code); - s->last_mv[1][1][0]= s->last_mv[1][0][0]= s->mv[1][0][0] = mx; - s->last_mv[1][1][1]= s->last_mv[1][0][1]= s->mv[1][0][1] = my; + s->last_mv[1][1][0] = + s->last_mv[1][0][0] = + s->mv[1][0][0] = mx; + s->last_mv[1][1][1] = + s->last_mv[1][0][1] = + s->mv[1][0][1] = my; } - }else if(!IS_DIRECT(mb_type)){ - s->mv_type= MV_TYPE_FIELD; + } else if (!IS_DIRECT(mb_type)) { + s->mv_type = MV_TYPE_FIELD; - if(USES_LIST(mb_type, 0)){ + if (USES_LIST(mb_type, 0)) { s->mv_dir = MV_DIR_FORWARD; - for(i=0; i<2; i++){ - mx = ff_h263_decode_motion(s, s->last_mv[0][i][0] , s->f_code); - my = ff_h263_decode_motion(s, s->last_mv[0][i][1]/2, s->f_code); - s->last_mv[0][i][0]= s->mv[0][i][0] = mx; - s->last_mv[0][i][1]= (s->mv[0][i][1] = my)*2; + for (i = 0; i < 2; i++) { + mx = ff_h263_decode_motion(s, s->last_mv[0][i][0], s->f_code); + my = ff_h263_decode_motion(s, s->last_mv[0][i][1] / 2, s->f_code); + s->last_mv[0][i][0] = + s->mv[0][i][0] = mx; + s->last_mv[0][i][1] = (s->mv[0][i][1] = my) * 2; } } - if(USES_LIST(mb_type, 1)){ + if (USES_LIST(mb_type, 1)) { s->mv_dir |= MV_DIR_BACKWARD; - for(i=0; i<2; i++){ - mx = ff_h263_decode_motion(s, s->last_mv[1][i][0] , s->b_code); - my = ff_h263_decode_motion(s, s->last_mv[1][i][1]/2, s->b_code); - s->last_mv[1][i][0]= s->mv[1][i][0] = mx; - s->last_mv[1][i][1]= (s->mv[1][i][1] = my)*2; + for (i = 0; i < 2; i++) { + mx = ff_h263_decode_motion(s, s->last_mv[1][i][0], s->b_code); + my = ff_h263_decode_motion(s, s->last_mv[1][i][1] / 2, s->b_code); + s->last_mv[1][i][0] = + s->mv[1][i][0] = mx; + s->last_mv[1][i][1] = (s->mv[1][i][1] = my) * 2; } } } } - if(IS_DIRECT(mb_type)){ - if(IS_SKIP(mb_type)) - mx=my=0; - else{ + if (IS_DIRECT(mb_type)) { + if (IS_SKIP(mb_type)) { + mx = + my = 0; + } else { mx = ff_h263_decode_motion(s, 0, 1); my = ff_h263_decode_motion(s, 0, 1); } s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT; - mb_type |= ff_mpeg4_set_direct_mv(s, mx, my); + mb_type |= ff_mpeg4_set_direct_mv(s, mx, my); } s->current_picture.mb_type[xy] = mb_type; } else { /* I-Frame */ - do{ + do { cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2); - if (cbpc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "I cbpc damaged at %d %d\n", s->mb_x, s->mb_y); + if (cbpc < 0) { + av_log(s->avctx, AV_LOG_ERROR, + "I cbpc damaged at %d %d\n", s->mb_x, s->mb_y); return -1; } - }while(cbpc == 8); + } while (cbpc == 8); dquant = cbpc & 4; s->mb_intra = 1; + intra: s->ac_pred = get_bits1(&s->gb); - if(s->ac_pred) + if (s->ac_pred) s->current_picture.mb_type[xy] = MB_TYPE_INTRA | MB_TYPE_ACPRED; else s->current_picture.mb_type[xy] = MB_TYPE_INTRA; cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); - if(cbpy<0){ - av_log(s->avctx, AV_LOG_ERROR, "I cbpy damaged at %d %d\n", s->mb_x, s->mb_y); + if (cbpy < 0) { + av_log(s->avctx, AV_LOG_ERROR, + "I cbpy damaged at %d %d\n", s->mb_x, s->mb_y); return -1; } cbp = (cbpc & 3) | (cbpy << 2); - s->use_intra_dc_vlc= s->qscale < s->intra_dc_threshold; + s->use_intra_dc_vlc = s->qscale < s->intra_dc_threshold; - if (dquant) { + if (dquant) ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); - } - if(!s->progressive_sequence) - s->interlaced_dct= get_bits1(&s->gb); + if (!s->progressive_sequence) + s->interlaced_dct = get_bits1(&s->gb); s->dsp.clear_blocks(s->block[0]); /* decode each block */ for (i = 0; i < 6; i++) { - if (mpeg4_decode_block(s, block[i], i, cbp&32, 1, 0) < 0) + if (mpeg4_decode_block(s, block[i], i, cbp & 32, 1, 0) < 0) return -1; - cbp+=cbp; + cbp += cbp; } goto end; } /* decode each block */ for (i = 0; i < 6; i++) { - if (mpeg4_decode_block(s, block[i], i, cbp&32, 0, 0) < 0) + if (mpeg4_decode_block(s, block[i], i, cbp & 32, 0, 0) < 0) return -1; - cbp+=cbp; + cbp += cbp; } -end: - /* per-MB end of slice check */ - if(s->codec_id==AV_CODEC_ID_MPEG4){ - if(mpeg4_is_resync(s)){ - const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1; +end: + /* per-MB end of slice check */ + if (s->codec_id == AV_CODEC_ID_MPEG4) { + if (mpeg4_is_resync(s)) { + const int delta = s->mb_x + 1 == s->mb_width ? 2 : 1; - if (s->pict_type == AV_PICTURE_TYPE_B && s->next_picture.mbskip_table[xy + delta]) { + if (s->pict_type == AV_PICTURE_TYPE_B && + s->next_picture.mbskip_table[xy + delta]) { ff_thread_await_progress(&s->next_picture_ptr->tf, - (s->mb_x + delta >= s->mb_width) ? FFMIN(s->mb_y+1, s->mb_height-1) : s->mb_y, 0); + (s->mb_x + delta >= s->mb_width) + ? FFMIN(s->mb_y + 1, s->mb_height - 1) + : s->mb_y, 0); } - if (s->pict_type == AV_PICTURE_TYPE_B && s->next_picture.mbskip_table[xy + delta]) + if (s->pict_type == AV_PICTURE_TYPE_B && + s->next_picture.mbskip_table[xy + delta]) return SLICE_OK; return SLICE_END; } @@ -1491,16 +1617,16 @@ end: return SLICE_OK; } - -static int mpeg4_decode_gop_header(MpegEncContext * s, GetBitContext *gb){ +static int mpeg4_decode_gop_header(MpegEncContext *s, GetBitContext *gb) +{ int hours, minutes, seconds; unsigned time_code = show_bits(gb, 18); if (time_code & 0x40) { /* marker_bit */ hours = time_code >> 13; - minutes = time_code >> 7 & 0x3f; - seconds = time_code & 0x3f; - s->time_base = seconds + 60*(minutes + 60*hours); + minutes = time_code >> 7 & 0x3f; + seconds = time_code & 0x3f; + s->time_base = seconds + 60 * (minutes + 60 * hours); skip_bits(gb, 20); /* time_code, closed_gov, broken_link */ } else { av_log(s->avctx, AV_LOG_WARNING, "GOP header missing marker_bit\n"); @@ -1509,49 +1635,51 @@ static int mpeg4_decode_gop_header(MpegEncContext * s, GetBitContext *gb){ return 0; } -static int mpeg4_decode_profile_level(MpegEncContext * s, GetBitContext *gb){ - int profile_and_level_indication; +static int mpeg4_decode_profile_level(MpegEncContext *s, GetBitContext *gb) +{ + int profile_and_level_indication; - profile_and_level_indication = get_bits(gb, 8); + profile_and_level_indication = get_bits(gb, 8); - s->avctx->profile = (profile_and_level_indication & 0xf0) >> 4; - s->avctx->level = (profile_and_level_indication & 0x0f); + s->avctx->profile = (profile_and_level_indication & 0xf0) >> 4; + s->avctx->level = (profile_and_level_indication & 0x0f); - // for Simple profile, level 0 - if (s->avctx->profile == 0 && s->avctx->level == 8) { - s->avctx->level = 0; - } + // for Simple profile, level 0 + if (s->avctx->profile == 0 && s->avctx->level == 8) { + s->avctx->level = 0; + } - return 0; + return 0; } -static int decode_vol_header(MpegEncContext *s, GetBitContext *gb){ +static int decode_vol_header(MpegEncContext *s, GetBitContext *gb) +{ int width, height, vo_ver_id; /* vol header */ - skip_bits(gb, 1); /* random access */ - s->vo_type= get_bits(gb, 8); - if (get_bits1(gb) != 0) { /* is_ol_id */ - vo_ver_id = get_bits(gb, 4); /* vo_ver_id */ - skip_bits(gb, 3); /* vo_priority */ + skip_bits(gb, 1); /* random access */ + s->vo_type = get_bits(gb, 8); + if (get_bits1(gb) != 0) { /* is_ol_id */ + vo_ver_id = get_bits(gb, 4); /* vo_ver_id */ + skip_bits(gb, 3); /* vo_priority */ } else { vo_ver_id = 1; } - s->aspect_ratio_info= get_bits(gb, 4); - if(s->aspect_ratio_info == FF_ASPECT_EXTENDED){ - s->avctx->sample_aspect_ratio.num= get_bits(gb, 8); // par_width - s->avctx->sample_aspect_ratio.den= get_bits(gb, 8); // par_height - }else{ - s->avctx->sample_aspect_ratio= ff_h263_pixel_aspect[s->aspect_ratio_info]; + s->aspect_ratio_info = get_bits(gb, 4); + if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) { + s->avctx->sample_aspect_ratio.num = get_bits(gb, 8); // par_width + s->avctx->sample_aspect_ratio.den = get_bits(gb, 8); // par_height + } else { + s->avctx->sample_aspect_ratio = ff_h263_pixel_aspect[s->aspect_ratio_info]; } - if ((s->vol_control_parameters=get_bits1(gb))) { /* vol control parameter */ - int chroma_format= get_bits(gb, 2); - if(chroma_format!=CHROMA_420){ + if ((s->vol_control_parameters = get_bits1(gb))) { /* vol control parameter */ + int chroma_format = get_bits(gb, 2); + if (chroma_format != CHROMA_420) av_log(s->avctx, AV_LOG_ERROR, "illegal chroma format\n"); - } - s->low_delay= get_bits1(gb); - if(get_bits1(gb)){ /* vbv parameters */ + + s->low_delay = get_bits1(gb); + if (get_bits1(gb)) { /* vbv parameters */ get_bits(gb, 15); /* first_half_bitrate */ skip_bits1(gb); /* marker */ get_bits(gb, 15); /* latter_half_bitrate */ @@ -1564,23 +1692,25 @@ static int decode_vol_header(MpegEncContext *s, GetBitContext *gb){ get_bits(gb, 15); /* latter_half_vbv_occupancy */ skip_bits1(gb); /* marker */ } - }else{ - // set low delay flag only once the smartest? low delay detection won't be overriden - if(s->picture_number==0) - s->low_delay=0; + } else { + /* is setting low delay flag only once the smartest thing to do? + * low delay detection won't be overriden. */ + if (s->picture_number == 0) + s->low_delay = 0; } s->shape = get_bits(gb, 2); /* vol shape */ - if(s->shape != RECT_SHAPE) av_log(s->avctx, AV_LOG_ERROR, "only rectangular vol supported\n"); - if(s->shape == GRAY_SHAPE && vo_ver_id != 1){ + if (s->shape != RECT_SHAPE) + av_log(s->avctx, AV_LOG_ERROR, "only rectangular vol supported\n"); + if (s->shape == GRAY_SHAPE && vo_ver_id != 1) { av_log(s->avctx, AV_LOG_ERROR, "Gray shape not supported\n"); - skip_bits(gb, 4); //video_object_layer_shape_extension + skip_bits(gb, 4); /* video_object_layer_shape_extension */ } check_marker(gb, "before time_increment_resolution"); s->avctx->time_base.den = get_bits(gb, 16); - if(!s->avctx->time_base.den){ + if (!s->avctx->time_base.den) { av_log(s->avctx, AV_LOG_ERROR, "time_base.den==0\n"); s->avctx->time_base.num = 0; return -1; @@ -1592,12 +1722,12 @@ static int decode_vol_header(MpegEncContext *s, GetBitContext *gb){ check_marker(gb, "before fixed_vop_rate"); - if (get_bits1(gb) != 0) { /* fixed_vop_rate */ + if (get_bits1(gb) != 0) /* fixed_vop_rate */ s->avctx->time_base.num = get_bits(gb, s->time_increment_bits); - }else + else s->avctx->time_base.num = 1; - s->t_frame=0; + s->t_frame = 0; if (s->shape != BIN_ONLY_SHAPE) { if (s->shape == RECT_SHAPE) { @@ -1606,231 +1736,247 @@ static int decode_vol_header(MpegEncContext *s, GetBitContext *gb){ skip_bits1(gb); /* marker */ height = get_bits(gb, 13); skip_bits1(gb); /* marker */ - if(width && height && !(s->width && s->codec_tag == AV_RL32("MP4S"))){ /* they should be non zero but who knows ... */ + if (width && height && /* they should be non zero but who knows */ + !(s->width && s->codec_tag == AV_RL32("MP4S"))) { if (s->width && s->height && (s->width != width || s->height != height)) s->context_reinit = 1; - s->width = width; + s->width = width; s->height = height; } } - s->progressive_sequence= - s->progressive_frame= get_bits1(gb)^1; - s->interlaced_dct=0; - if(!get_bits1(gb) && (s->avctx->debug & FF_DEBUG_PICT_INFO)) - av_log(s->avctx, AV_LOG_INFO, "MPEG4 OBMC not supported (very likely buggy encoder)\n"); /* OBMC Disable */ - if (vo_ver_id == 1) { - s->vol_sprite_usage = get_bits1(gb); /* vol_sprite_usage */ - } else { - s->vol_sprite_usage = get_bits(gb, 2); /* vol_sprite_usage */ - } - if(s->vol_sprite_usage==STATIC_SPRITE) av_log(s->avctx, AV_LOG_ERROR, "Static Sprites not supported\n"); - if(s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE){ - if(s->vol_sprite_usage==STATIC_SPRITE){ + s->progressive_sequence = + s->progressive_frame = get_bits1(gb) ^ 1; + s->interlaced_dct = 0; + if (!get_bits1(gb) && (s->avctx->debug & FF_DEBUG_PICT_INFO)) + av_log(s->avctx, AV_LOG_INFO, /* OBMC Disable */ + "MPEG4 OBMC not supported (very likely buggy encoder)\n"); + if (vo_ver_id == 1) + s->vol_sprite_usage = get_bits1(gb); /* vol_sprite_usage */ + else + s->vol_sprite_usage = get_bits(gb, 2); /* vol_sprite_usage */ + + if (s->vol_sprite_usage == STATIC_SPRITE) + av_log(s->avctx, AV_LOG_ERROR, "Static Sprites not supported\n"); + if (s->vol_sprite_usage == STATIC_SPRITE || + s->vol_sprite_usage == GMC_SPRITE) { + if (s->vol_sprite_usage == STATIC_SPRITE) { s->sprite_width = get_bits(gb, 13); skip_bits1(gb); /* marker */ - s->sprite_height= get_bits(gb, 13); + s->sprite_height = get_bits(gb, 13); skip_bits1(gb); /* marker */ - s->sprite_left = get_bits(gb, 13); + s->sprite_left = get_bits(gb, 13); skip_bits1(gb); /* marker */ - s->sprite_top = get_bits(gb, 13); + s->sprite_top = get_bits(gb, 13); skip_bits1(gb); /* marker */ } - s->num_sprite_warping_points= get_bits(gb, 6); - if(s->num_sprite_warping_points > 3){ - av_log(s->avctx, AV_LOG_ERROR, "%d sprite_warping_points\n", s->num_sprite_warping_points); - s->num_sprite_warping_points= 0; + s->num_sprite_warping_points = get_bits(gb, 6); + if (s->num_sprite_warping_points > 3) { + av_log(s->avctx, AV_LOG_ERROR, + "%d sprite_warping_points\n", + s->num_sprite_warping_points); + s->num_sprite_warping_points = 0; return -1; } - s->sprite_warping_accuracy = get_bits(gb, 2); - s->sprite_brightness_change= get_bits1(gb); - if(s->vol_sprite_usage==STATIC_SPRITE) - s->low_latency_sprite= get_bits1(gb); + s->sprite_warping_accuracy = get_bits(gb, 2); + s->sprite_brightness_change = get_bits1(gb); + if (s->vol_sprite_usage == STATIC_SPRITE) + s->low_latency_sprite = get_bits1(gb); } // FIXME sadct disable bit if verid!=1 && shape not rect - if (get_bits1(gb) == 1) { /* not_8_bit */ - s->quant_precision = get_bits(gb, 4); /* quant_precision */ - if(get_bits(gb, 4)!=8) av_log(s->avctx, AV_LOG_ERROR, "N-bit not supported\n"); /* bits_per_pixel */ - if(s->quant_precision!=5) av_log(s->avctx, AV_LOG_ERROR, "quant precision %d\n", s->quant_precision); + if (get_bits1(gb) == 1) { /* not_8_bit */ + s->quant_precision = get_bits(gb, 4); /* quant_precision */ + if (get_bits(gb, 4) != 8) /* bits_per_pixel */ + av_log(s->avctx, AV_LOG_ERROR, "N-bit not supported\n"); + if (s->quant_precision != 5) + av_log(s->avctx, AV_LOG_ERROR, + "quant precision %d\n", s->quant_precision); } else { s->quant_precision = 5; } // FIXME a bunch of grayscale shape things - if((s->mpeg_quant=get_bits1(gb))){ /* vol_quant_type */ + if ((s->mpeg_quant = get_bits1(gb))) { /* vol_quant_type */ int i, v; /* load default matrixes */ - for(i=0; i<64; i++){ - int j= s->dsp.idct_permutation[i]; - v= ff_mpeg4_default_intra_matrix[i]; - s->intra_matrix[j]= v; - s->chroma_intra_matrix[j]= v; - - v= ff_mpeg4_default_non_intra_matrix[i]; - s->inter_matrix[j]= v; - s->chroma_inter_matrix[j]= v; + for (i = 0; i < 64; i++) { + int j = s->dsp.idct_permutation[i]; + v = ff_mpeg4_default_intra_matrix[i]; + s->intra_matrix[j] = v; + s->chroma_intra_matrix[j] = v; + + v = ff_mpeg4_default_non_intra_matrix[i]; + s->inter_matrix[j] = v; + s->chroma_inter_matrix[j] = v; } /* load custom intra matrix */ - if(get_bits1(gb)){ - int last=0; - for(i=0; i<64; i++){ + if (get_bits1(gb)) { + int last = 0; + for (i = 0; i < 64; i++) { int j; - v= get_bits(gb, 8); - if(v==0) break; - - last= v; - j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->intra_matrix[j]= v; - s->chroma_intra_matrix[j]= v; + v = get_bits(gb, 8); + if (v == 0) + break; + + last = v; + j = s->dsp.idct_permutation[ff_zigzag_direct[i]]; + s->intra_matrix[j] = last; + s->chroma_intra_matrix[j] = last; } /* replicate last value */ - for(; i<64; i++){ - int j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->intra_matrix[j]= last; - s->chroma_intra_matrix[j]= last; + for (; i < 64; i++) { + int j = s->dsp.idct_permutation[ff_zigzag_direct[i]]; + s->intra_matrix[j] = last; + s->chroma_intra_matrix[j] = last; } } /* load custom non intra matrix */ - if(get_bits1(gb)){ - int last=0; - for(i=0; i<64; i++){ + if (get_bits1(gb)) { + int last = 0; + for (i = 0; i < 64; i++) { int j; - v= get_bits(gb, 8); - if(v==0) break; - - last= v; - j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->inter_matrix[j]= v; - s->chroma_inter_matrix[j]= v; + v = get_bits(gb, 8); + if (v == 0) + break; + + last = v; + j = s->dsp.idct_permutation[ff_zigzag_direct[i]]; + s->inter_matrix[j] = v; + s->chroma_inter_matrix[j] = v; } /* replicate last value */ - for(; i<64; i++){ - int j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->inter_matrix[j]= last; - s->chroma_inter_matrix[j]= last; + for (; i < 64; i++) { + int j = s->dsp.idct_permutation[ff_zigzag_direct[i]]; + s->inter_matrix[j] = last; + s->chroma_inter_matrix[j] = last; } } // FIXME a bunch of grayscale shape things } - if(vo_ver_id != 1) - s->quarter_sample= get_bits1(gb); - else s->quarter_sample=0; - - if(!get_bits1(gb)){ - int pos= get_bits_count(gb); - int estimation_method= get_bits(gb, 2); - if(estimation_method<2){ - if(!get_bits1(gb)){ - s->cplx_estimation_trash_i += 8*get_bits1(gb); //opaque - s->cplx_estimation_trash_i += 8*get_bits1(gb); //transparent - s->cplx_estimation_trash_i += 8*get_bits1(gb); //intra_cae - s->cplx_estimation_trash_i += 8*get_bits1(gb); //inter_cae - s->cplx_estimation_trash_i += 8*get_bits1(gb); //no_update - s->cplx_estimation_trash_i += 8*get_bits1(gb); //upampling + if (vo_ver_id != 1) + s->quarter_sample = get_bits1(gb); + else + s->quarter_sample = 0; + + if (!get_bits1(gb)) { + int pos = get_bits_count(gb); + int estimation_method = get_bits(gb, 2); + if (estimation_method < 2) { + if (!get_bits1(gb)) { + s->cplx_estimation_trash_i += 8 * get_bits1(gb); /* opaque */ + s->cplx_estimation_trash_i += 8 * get_bits1(gb); /* transparent */ + s->cplx_estimation_trash_i += 8 * get_bits1(gb); /* intra_cae */ + s->cplx_estimation_trash_i += 8 * get_bits1(gb); /* inter_cae */ + s->cplx_estimation_trash_i += 8 * get_bits1(gb); /* no_update */ + s->cplx_estimation_trash_i += 8 * get_bits1(gb); /* upampling */ } - if(!get_bits1(gb)){ - s->cplx_estimation_trash_i += 8*get_bits1(gb); //intra_blocks - s->cplx_estimation_trash_p += 8*get_bits1(gb); //inter_blocks - s->cplx_estimation_trash_p += 8*get_bits1(gb); //inter4v_blocks - s->cplx_estimation_trash_i += 8*get_bits1(gb); //not coded blocks + if (!get_bits1(gb)) { + s->cplx_estimation_trash_i += 8 * get_bits1(gb); /* intra_blocks */ + s->cplx_estimation_trash_p += 8 * get_bits1(gb); /* inter_blocks */ + s->cplx_estimation_trash_p += 8 * get_bits1(gb); /* inter4v_blocks */ + s->cplx_estimation_trash_i += 8 * get_bits1(gb); /* not coded blocks */ } - if(!check_marker(gb, "in complexity estimation part 1")){ + if (!check_marker(gb, "in complexity estimation part 1")) { skip_bits_long(gb, pos - get_bits_count(gb)); goto no_cplx_est; } - if(!get_bits1(gb)){ - s->cplx_estimation_trash_i += 8*get_bits1(gb); //dct_coeffs - s->cplx_estimation_trash_i += 8*get_bits1(gb); //dct_lines - s->cplx_estimation_trash_i += 8*get_bits1(gb); //vlc_syms - s->cplx_estimation_trash_i += 4*get_bits1(gb); //vlc_bits + if (!get_bits1(gb)) { + s->cplx_estimation_trash_i += 8 * get_bits1(gb); /* dct_coeffs */ + s->cplx_estimation_trash_i += 8 * get_bits1(gb); /* dct_lines */ + s->cplx_estimation_trash_i += 8 * get_bits1(gb); /* vlc_syms */ + s->cplx_estimation_trash_i += 4 * get_bits1(gb); /* vlc_bits */ } - if(!get_bits1(gb)){ - s->cplx_estimation_trash_p += 8*get_bits1(gb); //apm - s->cplx_estimation_trash_p += 8*get_bits1(gb); //npm - s->cplx_estimation_trash_b += 8*get_bits1(gb); //interpolate_mc_q - s->cplx_estimation_trash_p += 8*get_bits1(gb); //forwback_mc_q - s->cplx_estimation_trash_p += 8*get_bits1(gb); //halfpel2 - s->cplx_estimation_trash_p += 8*get_bits1(gb); //halfpel4 + if (!get_bits1(gb)) { + s->cplx_estimation_trash_p += 8 * get_bits1(gb); /* apm */ + s->cplx_estimation_trash_p += 8 * get_bits1(gb); /* npm */ + s->cplx_estimation_trash_b += 8 * get_bits1(gb); /* interpolate_mc_q */ + s->cplx_estimation_trash_p += 8 * get_bits1(gb); /* forwback_mc_q */ + s->cplx_estimation_trash_p += 8 * get_bits1(gb); /* halfpel2 */ + s->cplx_estimation_trash_p += 8 * get_bits1(gb); /* halfpel4 */ } - if(!check_marker(gb, "in complexity estimation part 2")){ + if (!check_marker(gb, "in complexity estimation part 2")) { skip_bits_long(gb, pos - get_bits_count(gb)); goto no_cplx_est; } - if(estimation_method==1){ - s->cplx_estimation_trash_i += 8*get_bits1(gb); //sadct - s->cplx_estimation_trash_p += 8*get_bits1(gb); //qpel + if (estimation_method == 1) { + s->cplx_estimation_trash_i += 8 * get_bits1(gb); /* sadct */ + s->cplx_estimation_trash_p += 8 * get_bits1(gb); /* qpel */ } - }else - av_log(s->avctx, AV_LOG_ERROR, "Invalid Complexity estimation method %d\n", estimation_method); - }else{ + } else + av_log(s->avctx, AV_LOG_ERROR, + "Invalid Complexity estimation method %d\n", + estimation_method); + } else { + no_cplx_est: - s->cplx_estimation_trash_i= - s->cplx_estimation_trash_p= - s->cplx_estimation_trash_b= 0; + s->cplx_estimation_trash_i = + s->cplx_estimation_trash_p = + s->cplx_estimation_trash_b = 0; } - s->resync_marker= !get_bits1(gb); /* resync_marker_disabled */ + s->resync_marker = !get_bits1(gb); /* resync_marker_disabled */ - s->data_partitioning= get_bits1(gb); - if(s->data_partitioning){ - s->rvlc= get_bits1(gb); - } + s->data_partitioning = get_bits1(gb); + if (s->data_partitioning) + s->rvlc = get_bits1(gb); - if(vo_ver_id != 1) { - s->new_pred= get_bits1(gb); - if(s->new_pred){ + if (vo_ver_id != 1) { + s->new_pred = get_bits1(gb); + if (s->new_pred) { av_log(s->avctx, AV_LOG_ERROR, "new pred not supported\n"); skip_bits(gb, 2); /* requested upstream message type */ - skip_bits1(gb); /* newpred segment type */ + skip_bits1(gb); /* newpred segment type */ } - s->reduced_res_vop= get_bits1(gb); - if(s->reduced_res_vop) av_log(s->avctx, AV_LOG_ERROR, "reduced resolution VOP not supported\n"); - } - else{ - s->new_pred=0; - s->reduced_res_vop= 0; + s->reduced_res_vop = get_bits1(gb); + if (s->reduced_res_vop) + av_log(s->avctx, AV_LOG_ERROR, + "reduced resolution VOP not supported\n"); + } else { + s->new_pred = 0; + s->reduced_res_vop = 0; } - s->scalability= get_bits1(gb); + s->scalability = get_bits1(gb); if (s->scalability) { - GetBitContext bak= *gb; + GetBitContext bak = *gb; int h_sampling_factor_n; int h_sampling_factor_m; int v_sampling_factor_n; int v_sampling_factor_m; - s->hierachy_type= get_bits1(gb); + s->hierachy_type = get_bits1(gb); skip_bits(gb, 4); /* ref_layer_id */ skip_bits1(gb); /* ref_layer_sampling_dir */ - h_sampling_factor_n= get_bits(gb, 5); - h_sampling_factor_m= get_bits(gb, 5); - v_sampling_factor_n= get_bits(gb, 5); - v_sampling_factor_m= get_bits(gb, 5); - s->enhancement_type= get_bits1(gb); - - if( h_sampling_factor_n==0 || h_sampling_factor_m==0 - || v_sampling_factor_n==0 || v_sampling_factor_m==0){ + h_sampling_factor_n = get_bits(gb, 5); + h_sampling_factor_m = get_bits(gb, 5); + v_sampling_factor_n = get_bits(gb, 5); + v_sampling_factor_m = get_bits(gb, 5); + s->enhancement_type = get_bits1(gb); + + if (h_sampling_factor_n == 0 || h_sampling_factor_m == 0 || + v_sampling_factor_n == 0 || v_sampling_factor_m == 0) { /* illegal scalability header (VERY broken encoder), * trying to workaround */ - s->scalability=0; - *gb= bak; - }else + s->scalability = 0; + *gb = bak; + } else av_log(s->avctx, AV_LOG_ERROR, "scalability not supported\n"); // bin shape stuff FIXME } } + return 0; } @@ -1838,129 +1984,144 @@ no_cplx_est: * Decode the user data stuff in the header. * Also initializes divx/xvid/lavc_version/build. */ -static int decode_user_data(MpegEncContext *s, GetBitContext *gb){ +static int decode_user_data(MpegEncContext *s, GetBitContext *gb) +{ char buf[256]; int i; int e; int ver = 0, build = 0, ver2 = 0, ver3 = 0; char last; - for(i=0; i<255 && get_bits_count(gb) < gb->size_in_bits; i++){ - if(show_bits(gb, 23) == 0) break; - buf[i]= get_bits(gb, 8); + for (i = 0; i < 255 && get_bits_count(gb) < gb->size_in_bits; i++) { + if (show_bits(gb, 23) == 0) + break; + buf[i] = get_bits(gb, 8); } - buf[i]=0; + buf[i] = 0; /* divx detection */ - e=sscanf(buf, "DivX%dBuild%d%c", &ver, &build, &last); - if(e<2) - e=sscanf(buf, "DivX%db%d%c", &ver, &build, &last); - if(e>=2){ - s->divx_version= ver; - s->divx_build= build; - s->divx_packed= e==3 && last=='p'; - if(s->divx_packed && !s->showed_packed_warning) { - av_log(s->avctx, AV_LOG_WARNING, "Invalid and inefficient vfw-avi packed B frames detected\n"); - s->showed_packed_warning=1; + e = sscanf(buf, "DivX%dBuild%d%c", &ver, &build, &last); + if (e < 2) + e = sscanf(buf, "DivX%db%d%c", &ver, &build, &last); + if (e >= 2) { + s->divx_version = ver; + s->divx_build = build; + s->divx_packed = e == 3 && last == 'p'; + if (s->divx_packed && !s->showed_packed_warning) { + av_log(s->avctx, AV_LOG_WARNING, + "Invalid and inefficient vfw-avi packed B frames detected\n"); + s->showed_packed_warning = 1; } } /* libavcodec detection */ - e=sscanf(buf, "FFmpe%*[^b]b%d", &build)+3; - if(e!=4) - e=sscanf(buf, "FFmpeg v%d.%d.%d / libavcodec build: %d", &ver, &ver2, &ver3, &build); - if(e!=4){ - e=sscanf(buf, "Lavc%d.%d.%d", &ver, &ver2, &ver3)+1; - if (e>1) - build= (ver<<16) + (ver2<<8) + ver3; - } - if(e!=4){ - if(strcmp(buf, "ffmpeg")==0){ - s->lavc_build= 4600; - } + e = sscanf(buf, "FFmpe%*[^b]b%d", &build) + 3; + if (e != 4) + e = sscanf(buf, "FFmpeg v%d.%d.%d / libavcodec build: %d", &ver, &ver2, &ver3, &build); + if (e != 4) { + e = sscanf(buf, "Lavc%d.%d.%d", &ver, &ver2, &ver3) + 1; + if (e > 1) + build = (ver << 16) + (ver2 << 8) + ver3; } - if(e==4){ - s->lavc_build= build; + if (e != 4) { + if (strcmp(buf, "ffmpeg") == 0) + s->lavc_build = 4600; } + if (e == 4) + s->lavc_build = build; /* Xvid detection */ - e=sscanf(buf, "XviD%d", &build); - if(e==1){ - s->xvid_build= build; - } + e = sscanf(buf, "XviD%d", &build); + if (e == 1) + s->xvid_build = build; return 0; } -static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){ +static int decode_vop_header(MpegEncContext *s, GetBitContext *gb) +{ int time_incr, time_increment; s->pict_type = get_bits(gb, 2) + AV_PICTURE_TYPE_I; /* pict type: I = 0 , P = 1 */ - if(s->pict_type==AV_PICTURE_TYPE_B && s->low_delay && s->vol_control_parameters==0 && !(s->flags & CODEC_FLAG_LOW_DELAY)){ + if (s->pict_type == AV_PICTURE_TYPE_B && s->low_delay && + s->vol_control_parameters == 0 && !(s->flags & CODEC_FLAG_LOW_DELAY)) { av_log(s->avctx, AV_LOG_ERROR, "low_delay flag incorrectly, clearing it\n"); - s->low_delay=0; + s->low_delay = 0; } - s->partitioned_frame= s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B; - if(s->partitioned_frame) - s->decode_mb= mpeg4_decode_partitioned_mb; + s->partitioned_frame = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B; + if (s->partitioned_frame) + s->decode_mb = mpeg4_decode_partitioned_mb; else - s->decode_mb= mpeg4_decode_mb; + s->decode_mb = mpeg4_decode_mb; - time_incr=0; + time_incr = 0; while (get_bits1(gb) != 0) time_incr++; check_marker(gb, "before time_increment"); - if(s->time_increment_bits==0 || !(show_bits(gb, s->time_increment_bits+1)&1)){ - av_log(s->avctx, AV_LOG_ERROR, "hmm, seems the headers are not complete, trying to guess time_increment_bits\n"); - - for(s->time_increment_bits=1 ;s->time_increment_bits<16; s->time_increment_bits++){ - if ( s->pict_type == AV_PICTURE_TYPE_P - || (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE)) { - if((show_bits(gb, s->time_increment_bits+6)&0x37) == 0x30) break; - }else - if((show_bits(gb, s->time_increment_bits+5)&0x1F) == 0x18) break; + if (s->time_increment_bits == 0 || + !(show_bits(gb, s->time_increment_bits + 1) & 1)) { + av_log(s->avctx, AV_LOG_ERROR, + "hmm, seems the headers are not complete, trying to guess time_increment_bits\n"); + + for (s->time_increment_bits = 1; + s->time_increment_bits < 16; + s->time_increment_bits++) { + if (s->pict_type == AV_PICTURE_TYPE_P || + (s->pict_type == AV_PICTURE_TYPE_S && + s->vol_sprite_usage == GMC_SPRITE)) { + if ((show_bits(gb, s->time_increment_bits + 6) & 0x37) == 0x30) + break; + } else if ((show_bits(gb, s->time_increment_bits + 5) & 0x1F) == 0x18) + break; } - av_log(s->avctx, AV_LOG_ERROR, "my guess is %d bits ;)\n",s->time_increment_bits); + av_log(s->avctx, AV_LOG_ERROR, + "my guess is %d bits ;)\n", s->time_increment_bits); } - if(IS_3IV1) time_increment= get_bits1(gb); //FIXME investigate further - else time_increment= get_bits(gb, s->time_increment_bits); - - if(s->pict_type!=AV_PICTURE_TYPE_B){ - s->last_time_base= s->time_base; - s->time_base+= time_incr; - s->time= s->time_base*s->avctx->time_base.den + time_increment; - if(s->workaround_bugs&FF_BUG_UMP4){ - if(s->time < s->last_non_b_time){ + if (IS_3IV1) + time_increment = get_bits1(gb); // FIXME investigate further + else + time_increment = get_bits(gb, s->time_increment_bits); + + if (s->pict_type != AV_PICTURE_TYPE_B) { + s->last_time_base = s->time_base; + s->time_base += time_incr; + s->time = s->time_base * s->avctx->time_base.den + time_increment; + if (s->workaround_bugs & FF_BUG_UMP4) { + if (s->time < s->last_non_b_time) { /* header is not mpeg-4-compatible, broken encoder, * trying to workaround */ s->time_base++; - s->time+= s->avctx->time_base.den; + s->time += s->avctx->time_base.den; } } - s->pp_time= s->time - s->last_non_b_time; - s->last_non_b_time= s->time; - }else{ - s->time= (s->last_time_base + time_incr)*s->avctx->time_base.den + time_increment; - s->pb_time= s->pp_time - (s->last_non_b_time - s->time); - if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){ + s->pp_time = s->time - s->last_non_b_time; + s->last_non_b_time = s->time; + } else { + s->time = (s->last_time_base + time_incr) * s->avctx->time_base.den + time_increment; + s->pb_time = s->pp_time - (s->last_non_b_time - s->time); + if (s->pp_time <= s->pb_time || + s->pp_time <= s->pp_time - s->pb_time || + s->pp_time <= 0) { /* messed up order, maybe after seeking? skipping current b-frame */ return FRAME_SKIPPED; } ff_mpeg4_init_direct_mv(s); - if(s->t_frame==0) s->t_frame= s->pb_time; - if(s->t_frame==0) s->t_frame=1; // 1/0 protection - s->pp_field_time= ( ROUNDED_DIV(s->last_non_b_time, s->t_frame) - - ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame))*2; - s->pb_field_time= ( ROUNDED_DIV(s->time, s->t_frame) - - ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame))*2; - if(!s->progressive_sequence){ - if(s->pp_field_time <= s->pb_field_time || s->pb_field_time <= 1) + if (s->t_frame == 0) + s->t_frame = s->pb_time; + if (s->t_frame == 0) + s->t_frame = 1; // 1/0 protection + s->pp_field_time = (ROUNDED_DIV(s->last_non_b_time, s->t_frame) - + ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame)) * 2; + s->pb_field_time = (ROUNDED_DIV(s->time, s->t_frame) - + ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame)) * 2; + if (!s->progressive_sequence) { + if (s->pp_field_time <= s->pb_field_time || s->pb_field_time <= 1) return FRAME_SKIPPED; } } @@ -1968,133 +2129,151 @@ static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){ check_marker(gb, "before vop_coded"); /* vop coded */ - if (get_bits1(gb) != 1){ - if(s->avctx->debug&FF_DEBUG_PICT_INFO) + if (get_bits1(gb) != 1) { + if (s->avctx->debug & FF_DEBUG_PICT_INFO) av_log(s->avctx, AV_LOG_ERROR, "vop not coded\n"); return FRAME_SKIPPED; } - if (s->shape != BIN_ONLY_SHAPE && ( s->pict_type == AV_PICTURE_TYPE_P - || (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE))) { + if (s->shape != BIN_ONLY_SHAPE && + (s->pict_type == AV_PICTURE_TYPE_P || + (s->pict_type == AV_PICTURE_TYPE_S && + s->vol_sprite_usage == GMC_SPRITE))) { /* rounding type for motion estimation */ s->no_rounding = get_bits1(gb); } else { s->no_rounding = 0; } -//FIXME reduced res stuff - - if (s->shape != RECT_SHAPE) { - if (s->vol_sprite_usage != 1 || s->pict_type != AV_PICTURE_TYPE_I) { - skip_bits(gb, 13); /* width */ - skip_bits1(gb); /* marker */ - skip_bits(gb, 13); /* height */ - skip_bits1(gb); /* marker */ - skip_bits(gb, 13); /* hor_spat_ref */ - skip_bits1(gb); /* marker */ - skip_bits(gb, 13); /* ver_spat_ref */ - } - skip_bits1(gb); /* change_CR_disable */ - - if (get_bits1(gb) != 0) { - skip_bits(gb, 8); /* constant_alpha_value */ - } - } -//FIXME complexity estimation stuff - - if (s->shape != BIN_ONLY_SHAPE) { - skip_bits_long(gb, s->cplx_estimation_trash_i); - if(s->pict_type != AV_PICTURE_TYPE_I) + // FIXME reduced res stuff + + if (s->shape != RECT_SHAPE) { + if (s->vol_sprite_usage != 1 || s->pict_type != AV_PICTURE_TYPE_I) { + skip_bits(gb, 13); /* width */ + skip_bits1(gb); /* marker */ + skip_bits(gb, 13); /* height */ + skip_bits1(gb); /* marker */ + skip_bits(gb, 13); /* hor_spat_ref */ + skip_bits1(gb); /* marker */ + skip_bits(gb, 13); /* ver_spat_ref */ + } + skip_bits1(gb); /* change_CR_disable */ + + if (get_bits1(gb) != 0) + skip_bits(gb, 8); /* constant_alpha_value */ + } + + // FIXME complexity estimation stuff + + if (s->shape != BIN_ONLY_SHAPE) { + skip_bits_long(gb, s->cplx_estimation_trash_i); + if (s->pict_type != AV_PICTURE_TYPE_I) skip_bits_long(gb, s->cplx_estimation_trash_p); - if(s->pict_type == AV_PICTURE_TYPE_B) + if (s->pict_type == AV_PICTURE_TYPE_B) skip_bits_long(gb, s->cplx_estimation_trash_b); - s->intra_dc_threshold= ff_mpeg4_dc_threshold[ get_bits(gb, 3) ]; - if(!s->progressive_sequence){ - s->top_field_first= get_bits1(gb); - s->alternate_scan= get_bits1(gb); - }else - s->alternate_scan= 0; - } - - if(s->alternate_scan){ - ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan); - } else{ - ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan); - } - - if(s->pict_type == AV_PICTURE_TYPE_S && (s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE)){ - if (mpeg4_decode_sprite_trajectory(s, gb) < 0) - return AVERROR_INVALIDDATA; - if(s->sprite_brightness_change) av_log(s->avctx, AV_LOG_ERROR, "sprite_brightness_change not supported\n"); - if(s->vol_sprite_usage==STATIC_SPRITE) av_log(s->avctx, AV_LOG_ERROR, "static sprite not supported\n"); - } - - if (s->shape != BIN_ONLY_SHAPE) { - s->chroma_qscale= s->qscale = get_bits(gb, s->quant_precision); - if(s->qscale==0){ - av_log(s->avctx, AV_LOG_ERROR, "Error, header damaged or not MPEG4 header (qscale=0)\n"); - return -1; // makes no sense to continue, as there is nothing left from the image then - } - - if (s->pict_type != AV_PICTURE_TYPE_I) { - s->f_code = get_bits(gb, 3); /* fcode_for */ - if(s->f_code==0){ - av_log(s->avctx, AV_LOG_ERROR, "Error, header damaged or not MPEG4 header (f_code=0)\n"); - return -1; // makes no sense to continue, as the MV decoding will break very quickly - } - }else - s->f_code=1; - - if (s->pict_type == AV_PICTURE_TYPE_B) { - s->b_code = get_bits(gb, 3); - }else - s->b_code=1; - - if(s->avctx->debug&FF_DEBUG_PICT_INFO){ - av_log(s->avctx, AV_LOG_DEBUG, "qp:%d fc:%d,%d %s size:%d pro:%d alt:%d top:%d %spel part:%d resync:%d w:%d a:%d rnd:%d vot:%d%s dc:%d ce:%d/%d/%d\n", - s->qscale, s->f_code, s->b_code, - s->pict_type == AV_PICTURE_TYPE_I ? "I" : (s->pict_type == AV_PICTURE_TYPE_P ? "P" : (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")), - gb->size_in_bits,s->progressive_sequence, s->alternate_scan, s->top_field_first, - s->quarter_sample ? "q" : "h", s->data_partitioning, s->resync_marker, s->num_sprite_warping_points, - s->sprite_warping_accuracy, 1-s->no_rounding, s->vo_type, s->vol_control_parameters ? " VOLC" : " ", s->intra_dc_threshold, s->cplx_estimation_trash_i, s->cplx_estimation_trash_p, s->cplx_estimation_trash_b); - } - - if(!s->scalability){ - if (s->shape!=RECT_SHAPE && s->pict_type!=AV_PICTURE_TYPE_I) { - skip_bits1(gb); // vop shape coding type - } - }else{ - if(s->enhancement_type){ - int load_backward_shape= get_bits1(gb); - if(load_backward_shape){ - av_log(s->avctx, AV_LOG_ERROR, "load backward shape isn't supported\n"); - } - } - skip_bits(gb, 2); //ref_select_code - } - } - /* detect buggy encoders which don't set the low_delay flag (divx4/xvid/opendivx)*/ - // note we cannot detect divx5 without b-frames easily (although it's buggy too) - if(s->vo_type==0 && s->vol_control_parameters==0 && s->divx_version==-1 && s->picture_number==0){ - av_log(s->avctx, AV_LOG_WARNING, "looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag\n"); - s->low_delay=1; - } - - s->picture_number++; // better than pic number==0 always ;) - - s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table; //FIXME add short header support - s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table; - - if(s->workaround_bugs&FF_BUG_EDGE){ - s->h_edge_pos= s->width; - s->v_edge_pos= s->height; - } - return 0; + s->intra_dc_threshold = ff_mpeg4_dc_threshold[get_bits(gb, 3)]; + if (!s->progressive_sequence) { + s->top_field_first = get_bits1(gb); + s->alternate_scan = get_bits1(gb); + } else + s->alternate_scan = 0; + } + + if (s->alternate_scan) { + ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan); + ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan); + ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan); + ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan); + } else { + ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct); + ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct); + ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan); + ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan); + } + + if (s->pict_type == AV_PICTURE_TYPE_S && + (s->vol_sprite_usage == STATIC_SPRITE || + s->vol_sprite_usage == GMC_SPRITE)) { + if (mpeg4_decode_sprite_trajectory(s, gb) < 0) + return AVERROR_INVALIDDATA; + if (s->sprite_brightness_change) + av_log(s->avctx, AV_LOG_ERROR, + "sprite_brightness_change not supported\n"); + if (s->vol_sprite_usage == STATIC_SPRITE) + av_log(s->avctx, AV_LOG_ERROR, "static sprite not supported\n"); + } + + if (s->shape != BIN_ONLY_SHAPE) { + s->chroma_qscale = s->qscale = get_bits(gb, s->quant_precision); + if (s->qscale == 0) { + av_log(s->avctx, AV_LOG_ERROR, + "Error, header damaged or not MPEG4 header (qscale=0)\n"); + return -1; // makes no sense to continue, as there is nothing left from the image then + } + + if (s->pict_type != AV_PICTURE_TYPE_I) { + s->f_code = get_bits(gb, 3); /* fcode_for */ + if (s->f_code == 0) { + av_log(s->avctx, AV_LOG_ERROR, + "Error, header damaged or not MPEG4 header (f_code=0)\n"); + return -1; // makes no sense to continue, as there is nothing left from the image then + } + } else + s->f_code = 1; + + if (s->pict_type == AV_PICTURE_TYPE_B) { + s->b_code = get_bits(gb, 3); + } else + s->b_code = 1; + + if (s->avctx->debug & FF_DEBUG_PICT_INFO) { + av_log(s->avctx, AV_LOG_DEBUG, + "qp:%d fc:%d,%d %s size:%d pro:%d alt:%d top:%d %spel part:%d resync:%d w:%d a:%d rnd:%d vot:%d%s dc:%d ce:%d/%d/%d\n", + s->qscale, s->f_code, s->b_code, + s->pict_type == AV_PICTURE_TYPE_I ? "I" : (s->pict_type == AV_PICTURE_TYPE_P ? "P" : (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")), + gb->size_in_bits, s->progressive_sequence, s->alternate_scan, + s->top_field_first, s->quarter_sample ? "q" : "h", + s->data_partitioning, s->resync_marker, + s->num_sprite_warping_points, s->sprite_warping_accuracy, + 1 - s->no_rounding, s->vo_type, + s->vol_control_parameters ? " VOLC" : " ", s->intra_dc_threshold, + s->cplx_estimation_trash_i, s->cplx_estimation_trash_p, + s->cplx_estimation_trash_b); + } + + if (!s->scalability) { + if (s->shape != RECT_SHAPE && s->pict_type != AV_PICTURE_TYPE_I) + skip_bits1(gb); // vop shape coding type + } else { + if (s->enhancement_type) { + int load_backward_shape = get_bits1(gb); + if (load_backward_shape) + av_log(s->avctx, AV_LOG_ERROR, + "load backward shape isn't supported\n"); + } + skip_bits(gb, 2); // ref_select_code + } + } + /* detect buggy encoders which don't set the low_delay flag + * (divx4/xvid/opendivx). Note we cannot detect divx5 without b-frames + * easily (although it's buggy too) */ + if (s->vo_type == 0 && s->vol_control_parameters == 0 && + s->divx_version == -1 && s->picture_number == 0) { + av_log(s->avctx, AV_LOG_WARNING, + "looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag\n"); + s->low_delay = 1; + } + + s->picture_number++; // better than pic number==0 always ;) + + // FIXME add short header support + s->y_dc_scale_table = ff_mpeg4_y_dc_scale_table; + s->c_dc_scale_table = ff_mpeg4_c_dc_scale_table; + + if (s->workaround_bugs & FF_BUG_EDGE) { + s->h_edge_pos = s->width; + s->v_edge_pos = s->height; + } + return 0; } /** @@ -2103,92 +2282,118 @@ static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){ * FRAME_SKIPPED if a not coded VOP is found * 0 if a VOP is found */ -int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb) +int ff_mpeg4_decode_picture_header(MpegEncContext *s, GetBitContext *gb) { unsigned startcode, v; /* search next start code */ align_get_bits(gb); - if(s->codec_tag == AV_RL32("WV1F") && show_bits(gb, 24) == 0x575630){ + if (s->codec_tag == AV_RL32("WV1F") && show_bits(gb, 24) == 0x575630) { skip_bits(gb, 24); - if(get_bits(gb, 8) == 0xF0) + if (get_bits(gb, 8) == 0xF0) goto end; } startcode = 0xff; - for(;;) { - if(get_bits_count(gb) >= gb->size_in_bits){ - if(gb->size_in_bits==8 && (s->divx_version>=0 || s->xvid_build>=0)){ + for (;;) { + if (get_bits_count(gb) >= gb->size_in_bits) { + if (gb->size_in_bits == 8 && + (s->divx_version >= 0 || s->xvid_build >= 0)) { av_log(s->avctx, AV_LOG_WARNING, "frame skip %d\n", gb->size_in_bits); - return FRAME_SKIPPED; //divx bug - }else - return -1; //end of stream + return FRAME_SKIPPED; // divx bug + } else + return -1; // end of stream } /* use the bits after the test */ v = get_bits(gb, 8); startcode = ((startcode << 8) | v) & 0xffffffff; - if((startcode&0xFFFFFF00) != 0x100) - continue; //no startcode + if ((startcode & 0xFFFFFF00) != 0x100) + continue; // no startcode - if(s->avctx->debug&FF_DEBUG_STARTCODE){ + if (s->avctx->debug & FF_DEBUG_STARTCODE) { av_log(s->avctx, AV_LOG_DEBUG, "startcode: %3X ", startcode); - if (startcode<=0x11F) av_log(s->avctx, AV_LOG_DEBUG, "Video Object Start"); - else if(startcode<=0x12F) av_log(s->avctx, AV_LOG_DEBUG, "Video Object Layer Start"); - else if(startcode<=0x13F) av_log(s->avctx, AV_LOG_DEBUG, "Reserved"); - else if(startcode<=0x15F) av_log(s->avctx, AV_LOG_DEBUG, "FGS bp start"); - else if(startcode<=0x1AF) av_log(s->avctx, AV_LOG_DEBUG, "Reserved"); - else if(startcode==0x1B0) av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq Start"); - else if(startcode==0x1B1) av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq End"); - else if(startcode==0x1B2) av_log(s->avctx, AV_LOG_DEBUG, "User Data"); - else if(startcode==0x1B3) av_log(s->avctx, AV_LOG_DEBUG, "Group of VOP start"); - else if(startcode==0x1B4) av_log(s->avctx, AV_LOG_DEBUG, "Video Session Error"); - else if(startcode==0x1B5) av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Start"); - else if(startcode==0x1B6) av_log(s->avctx, AV_LOG_DEBUG, "Video Object Plane start"); - else if(startcode==0x1B7) av_log(s->avctx, AV_LOG_DEBUG, "slice start"); - else if(startcode==0x1B8) av_log(s->avctx, AV_LOG_DEBUG, "extension start"); - else if(startcode==0x1B9) av_log(s->avctx, AV_LOG_DEBUG, "fgs start"); - else if(startcode==0x1BA) av_log(s->avctx, AV_LOG_DEBUG, "FBA Object start"); - else if(startcode==0x1BB) av_log(s->avctx, AV_LOG_DEBUG, "FBA Object Plane start"); - else if(startcode==0x1BC) av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object start"); - else if(startcode==0x1BD) av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object Plane start"); - else if(startcode==0x1BE) av_log(s->avctx, AV_LOG_DEBUG, "Still Texture Object start"); - else if(startcode==0x1BF) av_log(s->avctx, AV_LOG_DEBUG, "Texture Spatial Layer start"); - else if(startcode==0x1C0) av_log(s->avctx, AV_LOG_DEBUG, "Texture SNR Layer start"); - else if(startcode==0x1C1) av_log(s->avctx, AV_LOG_DEBUG, "Texture Tile start"); - else if(startcode==0x1C2) av_log(s->avctx, AV_LOG_DEBUG, "Texture Shape Layer start"); - else if(startcode==0x1C3) av_log(s->avctx, AV_LOG_DEBUG, "stuffing start"); - else if(startcode<=0x1C5) av_log(s->avctx, AV_LOG_DEBUG, "reserved"); - else if(startcode<=0x1FF) av_log(s->avctx, AV_LOG_DEBUG, "System start"); + if (startcode <= 0x11F) + av_log(s->avctx, AV_LOG_DEBUG, "Video Object Start"); + else if (startcode <= 0x12F) + av_log(s->avctx, AV_LOG_DEBUG, "Video Object Layer Start"); + else if (startcode <= 0x13F) + av_log(s->avctx, AV_LOG_DEBUG, "Reserved"); + else if (startcode <= 0x15F) + av_log(s->avctx, AV_LOG_DEBUG, "FGS bp start"); + else if (startcode <= 0x1AF) + av_log(s->avctx, AV_LOG_DEBUG, "Reserved"); + else if (startcode == 0x1B0) + av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq Start"); + else if (startcode == 0x1B1) + av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq End"); + else if (startcode == 0x1B2) + av_log(s->avctx, AV_LOG_DEBUG, "User Data"); + else if (startcode == 0x1B3) + av_log(s->avctx, AV_LOG_DEBUG, "Group of VOP start"); + else if (startcode == 0x1B4) + av_log(s->avctx, AV_LOG_DEBUG, "Video Session Error"); + else if (startcode == 0x1B5) + av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Start"); + else if (startcode == 0x1B6) + av_log(s->avctx, AV_LOG_DEBUG, "Video Object Plane start"); + else if (startcode == 0x1B7) + av_log(s->avctx, AV_LOG_DEBUG, "slice start"); + else if (startcode == 0x1B8) + av_log(s->avctx, AV_LOG_DEBUG, "extension start"); + else if (startcode == 0x1B9) + av_log(s->avctx, AV_LOG_DEBUG, "fgs start"); + else if (startcode == 0x1BA) + av_log(s->avctx, AV_LOG_DEBUG, "FBA Object start"); + else if (startcode == 0x1BB) + av_log(s->avctx, AV_LOG_DEBUG, "FBA Object Plane start"); + else if (startcode == 0x1BC) + av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object start"); + else if (startcode == 0x1BD) + av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object Plane start"); + else if (startcode == 0x1BE) + av_log(s->avctx, AV_LOG_DEBUG, "Still Texture Object start"); + else if (startcode == 0x1BF) + av_log(s->avctx, AV_LOG_DEBUG, "Texture Spatial Layer start"); + else if (startcode == 0x1C0) + av_log(s->avctx, AV_LOG_DEBUG, "Texture SNR Layer start"); + else if (startcode == 0x1C1) + av_log(s->avctx, AV_LOG_DEBUG, "Texture Tile start"); + else if (startcode == 0x1C2) + av_log(s->avctx, AV_LOG_DEBUG, "Texture Shape Layer start"); + else if (startcode == 0x1C3) + av_log(s->avctx, AV_LOG_DEBUG, "stuffing start"); + else if (startcode <= 0x1C5) + av_log(s->avctx, AV_LOG_DEBUG, "reserved"); + else if (startcode <= 0x1FF) + av_log(s->avctx, AV_LOG_DEBUG, "System start"); av_log(s->avctx, AV_LOG_DEBUG, " at %d\n", get_bits_count(gb)); } - if(startcode >= 0x120 && startcode <= 0x12F){ - if(decode_vol_header(s, gb) < 0) + if (startcode >= 0x120 && startcode <= 0x12F) { + if (decode_vol_header(s, gb) < 0) return -1; - } - else if(startcode == USER_DATA_STARTCODE){ + } else if (startcode == USER_DATA_STARTCODE) { decode_user_data(s, gb); - } - else if(startcode == GOP_STARTCODE){ + } else if (startcode == GOP_STARTCODE) { mpeg4_decode_gop_header(s, gb); - } - else if(startcode == VOS_STARTCODE){ + } else if (startcode == VOS_STARTCODE) { mpeg4_decode_profile_level(s, gb); - } - else if(startcode == VOP_STARTCODE){ + } else if (startcode == VOP_STARTCODE) { break; } align_get_bits(gb); startcode = 0xff; } + end: - if(s->flags& CODEC_FLAG_LOW_DELAY) - s->low_delay=1; - s->avctx->has_b_frames= !s->low_delay; + if (s->flags & CODEC_FLAG_LOW_DELAY) + s->low_delay = 1; + s->avctx->has_b_frames = !s->low_delay; + return decode_vop_header(s, gb); } @@ -2198,12 +2403,12 @@ static av_cold int decode_init(AVCodecContext *avctx) int ret; static int done = 0; - s->divx_version= - s->divx_build= - s->xvid_build= - s->lavc_build= -1; + s->divx_version = + s->divx_build = + s->xvid_build = + s->lavc_build = -1; - if((ret=ff_h263_decode_init(avctx)) < 0) + if ((ret = ff_h263_decode_init(avctx)) < 0) return ret; if (!done) { @@ -2216,25 +2421,25 @@ static av_cold int decode_init(AVCodecContext *avctx) INIT_VLC_RL(ff_rvlc_rl_inter, 1072); INIT_VLC_RL(ff_rvlc_rl_intra, 1072); INIT_VLC_STATIC(&dc_lum, DC_VLC_BITS, 10 /* 13 */, - &ff_mpeg4_DCtab_lum[0][1], 2, 1, - &ff_mpeg4_DCtab_lum[0][0], 2, 1, 512); + &ff_mpeg4_DCtab_lum[0][1], 2, 1, + &ff_mpeg4_DCtab_lum[0][0], 2, 1, 512); INIT_VLC_STATIC(&dc_chrom, DC_VLC_BITS, 10 /* 13 */, - &ff_mpeg4_DCtab_chrom[0][1], 2, 1, - &ff_mpeg4_DCtab_chrom[0][0], 2, 1, 512); + &ff_mpeg4_DCtab_chrom[0][1], 2, 1, + &ff_mpeg4_DCtab_chrom[0][0], 2, 1, 512); INIT_VLC_STATIC(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15, - &ff_sprite_trajectory_tab[0][1], 4, 2, - &ff_sprite_trajectory_tab[0][0], 4, 2, 128); + &ff_sprite_trajectory_tab[0][1], 4, 2, + &ff_sprite_trajectory_tab[0][0], 4, 2, 128); INIT_VLC_STATIC(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4, - &ff_mb_type_b_tab[0][1], 2, 1, - &ff_mb_type_b_tab[0][0], 2, 1, 16); + &ff_mb_type_b_tab[0][1], 2, 1, + &ff_mb_type_b_tab[0][0], 2, 1, 16); } s->h263_pred = 1; - s->low_delay = 0; //default, might be overriden in the vol header during header parsing - s->decode_mb= mpeg4_decode_mb; + s->low_delay = 0; /* default, might be overriden in the vol header during header parsing */ + s->decode_mb = mpeg4_decode_mb; s->time_increment_bits = 4; /* default value for broken headers */ - avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; + avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; avctx->internal->allocate_progress = 1; return 0; |