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authorKostya Shishkov <kostya.shishkov@gmail.com>2006-06-27 02:55:54 +0000
committerKostya Shishkov <kostya.shishkov@gmail.com>2006-06-27 02:55:54 +0000
commit10b9c374cf5636855c36c486f0fb582e800db3dc (patch)
tree38a497ff7b0e4a340e67be9eb2e9ff61357063d7 /libavcodec/vc1.c
parentf33aa12011b45814f5cdc59a279111ae3fa5d53a (diff)
downloadffmpeg-10b9c374cf5636855c36c486f0fb582e800db3dc.tar.gz
Rename VC9 to VC1 as there is no such thing as VC9
Originally committed as revision 5529 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/vc1.c')
-rw-r--r--libavcodec/vc1.c2675
1 files changed, 2675 insertions, 0 deletions
diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
new file mode 100644
index 0000000000..de3da15d06
--- /dev/null
+++ b/libavcodec/vc1.c
@@ -0,0 +1,2675 @@
+/*
+ * VC-1 and WMV3 decoder
+ * Copyright (c) 2005 Anonymous
+ * Copyright (c) 2005 Alex Beregszaszi
+ * Copyright (c) 2005 Michael Niedermayer
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+/**
+ * @file vc1.c
+ * VC-1 and WMV3 decoder
+ *
+ * TODO: most AP stuff, optimize, most of MB layer, transform, filtering and motion compensation, etc
+ * TODO: use MPV_ !!
+ */
+#include "common.h"
+#include "dsputil.h"
+#include "avcodec.h"
+#include "mpegvideo.h"
+#include "vc1data.h"
+
+#undef NDEBUG
+#include <assert.h>
+
+extern const uint32_t ff_table0_dc_lum[120][2], ff_table1_dc_lum[120][2];
+extern const uint32_t ff_table0_dc_chroma[120][2], ff_table1_dc_chroma[120][2];
+extern VLC ff_msmp4_dc_luma_vlc[2], ff_msmp4_dc_chroma_vlc[2];
+#define MB_INTRA_VLC_BITS 9
+extern VLC ff_msmp4_mb_i_vlc;
+#define DC_VLC_BITS 9
+static const uint16_t table_mb_intra[64][2];
+
+/* Some inhibiting stuff */
+#define HAS_ADVANCED_PROFILE 0
+#define TRACE 1
+
+#if TRACE
+# define INIT_VLC(vlc, nb_bits, nb_codes, bits, bits_wrap, bits_size, \
+ codes, codes_wrap, codes_size, use_static) \
+ if (init_vlc(vlc, nb_bits, nb_codes, bits, bits_wrap, bits_size, \
+ codes, codes_wrap, codes_size, use_static) < 0) \
+ { \
+ av_log(v->s.avctx, AV_LOG_ERROR, "Error for " # vlc " (%i)\n", i); \
+ return -1; \
+ }
+#else
+# define INIT_VLC(vlc, nb_bits, nb_codes, bits, bits_wrap, bits_size, \
+ codes, codes_wrap, codes_size, use_static) \
+ init_vlc(vlc, nb_bits, nb_codes, bits, bits_wrap, bits_size, \
+ codes, codes_wrap, codes_size, use_static)
+#endif
+
+/** Available Profiles */
+//@{
+#define PROFILE_SIMPLE 0
+#define PROFILE_MAIN 1
+#define PROFILE_COMPLEX 2 ///< TODO: WMV9 specific
+#define PROFILE_ADVANCED 3
+//@}
+
+/** Sequence quantizer mode */
+//@{
+#define QUANT_FRAME_IMPLICIT 0 ///< Implicitly specified at frame level
+#define QUANT_FRAME_EXPLICIT 1 ///< Explicitly specified at frame level
+#define QUANT_NON_UNIFORM 2 ///< Non-uniform quant used for all frames
+#define QUANT_UNIFORM 3 ///< Uniform quant used for all frames
+//@}
+
+/** Where quant can be changed */
+//@{
+#define DQPROFILE_FOUR_EDGES 0
+#define DQPROFILE_DOUBLE_EDGES 1
+#define DQPROFILE_SINGLE_EDGE 2
+#define DQPROFILE_ALL_MBS 3
+//@}
+
+/** @name Where quant can be changed
+ */
+//@{
+#define DQPROFILE_FOUR_EDGES 0
+#define DQSINGLE_BEDGE_LEFT 0
+#define DQSINGLE_BEDGE_TOP 1
+#define DQSINGLE_BEDGE_RIGHT 2
+#define DQSINGLE_BEDGE_BOTTOM 3
+//@}
+
+/** Which pair of edges is quantized with ALTPQUANT */
+//@{
+#define DQDOUBLE_BEDGE_TOPLEFT 0
+#define DQDOUBLE_BEDGE_TOPRIGHT 1
+#define DQDOUBLE_BEDGE_BOTTOMRIGHT 2
+#define DQDOUBLE_BEDGE_BOTTOMLEFT 3
+//@}
+
+/** MV modes for P frames */
+//@{
+#define MV_PMODE_1MV_HPEL_BILIN 0
+#define MV_PMODE_1MV 1
+#define MV_PMODE_1MV_HPEL 2
+#define MV_PMODE_MIXED_MV 3
+#define MV_PMODE_INTENSITY_COMP 4
+//@}
+
+/** @name MV types for B frames */
+//@{
+#define BMV_TYPE_BACKWARD 0
+#define BMV_TYPE_BACKWARD 0
+#define BMV_TYPE_FORWARD 1
+#define BMV_TYPE_INTERPOLATED 3
+//@}
+
+/** MV P mode - the 5th element is only used for mode 1 */
+static const uint8_t mv_pmode_table[2][5] = {
+ { MV_PMODE_1MV_HPEL_BILIN, MV_PMODE_1MV, MV_PMODE_1MV_HPEL, MV_PMODE_MIXED_MV, MV_PMODE_INTENSITY_COMP },
+ { MV_PMODE_1MV, MV_PMODE_MIXED_MV, MV_PMODE_1MV_HPEL, MV_PMODE_1MV_HPEL_BILIN, MV_PMODE_INTENSITY_COMP }
+};
+
+/** One more frame type */
+#define BI_TYPE 7
+
+static const int fps_nr[5] = { 24, 25, 30, 50, 60 },
+ fps_dr[2] = { 1000, 1001 };
+static const uint8_t pquant_table[3][32] = {
+ { /* Implicit quantizer */
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 6, 7, 8, 9, 10, 11, 12,
+ 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 29, 31
+ },
+ { /* Explicit quantizer, pquantizer uniform */
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+ 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
+ },
+ { /* Explicit quantizer, pquantizer non-uniform */
+ 0, 1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
+ 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 29, 31
+ }
+};
+
+/** @name VC-1 VLC tables and defines
+ * @todo TODO move this into the context
+ */
+//@{
+#define VC1_BFRACTION_VLC_BITS 7
+static VLC vc1_bfraction_vlc;
+#define VC1_IMODE_VLC_BITS 4
+static VLC vc1_imode_vlc;
+#define VC1_NORM2_VLC_BITS 3
+static VLC vc1_norm2_vlc;
+#define VC1_NORM6_VLC_BITS 9
+static VLC vc1_norm6_vlc;
+/* Could be optimized, one table only needs 8 bits */
+#define VC1_TTMB_VLC_BITS 9 //12
+static VLC vc1_ttmb_vlc[3];
+#define VC1_MV_DIFF_VLC_BITS 9 //15
+static VLC vc1_mv_diff_vlc[4];
+#define VC1_CBPCY_P_VLC_BITS 9 //14
+static VLC vc1_cbpcy_p_vlc[4];
+#define VC1_4MV_BLOCK_PATTERN_VLC_BITS 6
+static VLC vc1_4mv_block_pattern_vlc[4];
+#define VC1_TTBLK_VLC_BITS 5
+static VLC vc1_ttblk_vlc[3];
+#define VC1_SUBBLKPAT_VLC_BITS 6
+static VLC vc1_subblkpat_vlc[3];
+//@}
+
+/** Bitplane struct
+ * We mainly need data and is_raw, so this struct could be avoided
+ * to save a level of indirection; feel free to modify
+ * @fixme For now, stride=width
+ * @warning Data are bits, either 1 or 0
+ */
+typedef struct BitPlane {
+ uint8_t *data; ///< Data buffer
+ int width; ///< Width of the buffer
+ int stride; ///< Stride of the buffer
+ int height; ///< Plane height
+ uint8_t is_raw; ///< Bit values must be read at MB level
+} BitPlane;
+
+/** The VC1 Context
+ * @fixme Change size wherever another size is more efficient
+ * Many members are only used for Advanced Profile
+ */
+typedef struct VC1Context{
+ MpegEncContext s;
+
+ /** Simple/Main Profile sequence header */
+ //@{
+ int res_sm; ///< reserved, 2b
+ int res_x8; ///< reserved
+ int multires; ///< frame-level RESPIC syntax element present
+ int res_fasttx; ///< reserved, always 1
+ int res_transtab; ///< reserved, always 0
+ int rangered; ///< RANGEREDFRM (range reduction) syntax element present
+ ///< at frame level
+ int res_rtm_flag; ///< reserved, set to 1
+ int reserved; ///< reserved
+ //@}
+
+#if HAS_ADVANCED_PROFILE
+ /** Advanced Profile */
+ //@{
+ int level; ///< 3bits, for Advanced/Simple Profile, provided by TS layer
+ int chromaformat; ///< 2bits, 2=4:2:0, only defined
+ int postprocflag; ///< Per-frame processing suggestion flag present
+ int broadcast; ///< TFF/RFF present
+ int interlace; ///< Progressive/interlaced (RPTFTM syntax element)
+ int tfcntrflag; ///< TFCNTR present
+ int panscanflag; ///< NUMPANSCANWIN, TOPLEFT{X,Y}, BOTRIGHT{X,Y} present
+ int extended_dmv; ///< Additional extended dmv range at P/B frame-level
+ int color_prim; ///< 8bits, chroma coordinates of the color primaries
+ int transfer_char; ///< 8bits, Opto-electronic transfer characteristics
+ int matrix_coef; ///< 8bits, Color primaries->YCbCr transform matrix
+ int hrd_param_flag; ///< Presence of Hypothetical Reference
+ ///< Decoder parameters
+ //@}
+#endif
+
+
+ /** Sequence header data for all Profiles
+ * TODO: choose between ints, uint8_ts and monobit flags
+ */
+ //@{
+ int profile; ///< 2bits, Profile
+ int frmrtq_postproc; ///< 3bits,
+ int bitrtq_postproc; ///< 5bits, quantized framerate-based postprocessing strength
+ int fastuvmc; ///< Rounding of qpel vector to hpel ? (not in Simple)
+ int extended_mv; ///< Ext MV in P/B (not in Simple)
+ int dquant; ///< How qscale varies with MBs, 2bits (not in Simple)
+ int vstransform; ///< variable-size [48]x[48] transform type + info
+ int overlap; ///< overlapped transforms in use
+ int quantizer_mode; ///< 2bits, quantizer mode used for sequence, see QUANT_*
+ int finterpflag; ///< INTERPFRM present
+ //@}
+
+ /** Frame decoding info for all profiles */
+ //@{
+ uint8_t mv_mode; ///< MV coding monde
+ uint8_t mv_mode2; ///< Secondary MV coding mode (B frames)
+ int k_x; ///< Number of bits for MVs (depends on MV range)
+ int k_y; ///< Number of bits for MVs (depends on MV range)
+ uint8_t pq, altpq; ///< Current/alternate frame quantizer scale
+ /** pquant parameters */
+ //@{
+ uint8_t dquantfrm;
+ uint8_t dqprofile;
+ uint8_t dqsbedge;
+ uint8_t dqbilevel;
+ //@}
+ /** AC coding set indexes
+ * @see 8.1.1.10, p(1)10
+ */
+ //@{
+ int c_ac_table_index; ///< Chroma index from ACFRM element
+ int y_ac_table_index; ///< Luma index from AC2FRM element
+ //@}
+ int ttfrm; ///< Transform type info present at frame level
+ uint8_t ttmbf; ///< Transform type flag
+ int ttmb; ///< Transform type
+ uint8_t ttblk4x4; ///< Value of ttblk which indicates a 4x4 transform
+ /** Luma compensation parameters */
+ //@{
+ uint8_t lumscale;
+ uint8_t lumshift;
+ //@}
+ int16_t bfraction; ///< Relative position % anchors=> how to scale MVs
+ uint8_t halfpq; ///< Uniform quant over image and qp+.5
+ uint8_t respic; ///< Frame-level flag for resized images
+ int buffer_fullness; ///< HRD info
+ /** Ranges:
+ * -# 0 -> [-64n 63.f] x [-32, 31.f]
+ * -# 1 -> [-128, 127.f] x [-64, 63.f]
+ * -# 2 -> [-512, 511.f] x [-128, 127.f]
+ * -# 3 -> [-1024, 1023.f] x [-256, 255.f]
+ */
+ uint8_t mvrange;
+ uint8_t pquantizer; ///< Uniform (over sequence) quantizer in use
+ uint8_t *previous_line_cbpcy; ///< To use for predicted CBPCY
+ VLC *cbpcy_vlc; ///< CBPCY VLC table
+ int tt_index; ///< Index for Transform Type tables
+ BitPlane mv_type_mb_plane; ///< bitplane for mv_type == (4MV)
+ BitPlane skip_mb_plane; ///< bitplane for skipped MBs
+ BitPlane direct_mb_plane; ///< bitplane for "direct" MBs
+
+ /** Frame decoding info for S/M profiles only */
+ //@{
+ uint8_t rangeredfrm; ///< out_sample = CLIP((in_sample-128)*2+128)
+ uint8_t interpfrm;
+ //@}
+
+#if HAS_ADVANCED_PROFILE
+ /** Frame decoding info for Advanced profile */
+ //@{
+ uint8_t fcm; ///< 0->Progressive, 2->Frame-Interlace, 3->Field-Interlace
+ uint8_t numpanscanwin;
+ uint8_t tfcntr;
+ uint8_t rptfrm, tff, rff;
+ uint16_t topleftx;
+ uint16_t toplefty;
+ uint16_t bottomrightx;
+ uint16_t bottomrighty;
+ uint8_t uvsamp;
+ uint8_t postproc;
+ int hrd_num_leaky_buckets;
+ uint8_t bit_rate_exponent;
+ uint8_t buffer_size_exponent;
+ BitPlane ac_pred_plane; ///< AC prediction flags bitplane
+ BitPlane over_flags_plane; ///< Overflags bitplane
+ uint8_t condover;
+ uint16_t *hrd_rate, *hrd_buffer;
+ uint8_t *hrd_fullness;
+ uint8_t range_mapy_flag;
+ uint8_t range_mapuv_flag;
+ uint8_t range_mapy;
+ uint8_t range_mapuv;
+ //@}
+#endif
+} VC1Context;
+
+/**
+ * Get unary code of limited length
+ * @fixme FIXME Slow and ugly
+ * @param gb GetBitContext
+ * @param[in] stop The bitstop value (unary code of 1's or 0's)
+ * @param[in] len Maximum length
+ * @return Unary length/index
+ */
+static int get_prefix(GetBitContext *gb, int stop, int len)
+{
+#if 1
+ int i = 0, tmp = !stop;
+
+ while (i != len && tmp != stop)
+ {
+ tmp = get_bits(gb, 1);
+ i++;
+ }
+ if (i == len && tmp != stop) return len+1;
+ return i;
+#else
+ unsigned int buf;
+ int log;
+
+ OPEN_READER(re, gb);
+ UPDATE_CACHE(re, gb);
+ buf=GET_CACHE(re, gb); //Still not sure
+ if (stop) buf = ~buf;
+
+ log= av_log2(-buf); //FIXME: -?
+ if (log < limit){
+ LAST_SKIP_BITS(re, gb, log+1);
+ CLOSE_READER(re, gb);
+ return log;
+ }
+
+ LAST_SKIP_BITS(re, gb, limit);
+ CLOSE_READER(re, gb);
+ return limit;
+#endif
+}
+
+/**
+ * Init VC-1 specific tables and VC1Context members
+ * @param v The VC1Context to initialize
+ * @return Status
+ */
+static int vc1_init_common(VC1Context *v)
+{
+ static int done = 0;
+ int i = 0;
+
+ /* Set the bit planes */
+ v->mv_type_mb_plane = (struct BitPlane) { NULL, 0, 0, 0 };
+ v->direct_mb_plane = (struct BitPlane) { NULL, 0, 0, 0 };
+ v->skip_mb_plane = (struct BitPlane) { NULL, 0, 0, 0 };
+#if HAS_ADVANCED_PROFILE
+ v->ac_pred_plane = v->over_flags_plane = (struct BitPlane) { NULL, 0, 0, 0 };
+ v->hrd_rate = v->hrd_buffer = NULL;
+#endif
+
+ /* VLC tables */
+#if 0 // spec -> actual tables converter
+ for(i=0; i<64; i++){
+ int code= (vc1_norm6_spec[i][1] << vc1_norm6_spec[i][4]) + vc1_norm6_spec[i][3];
+ av_log(NULL, AV_LOG_DEBUG, "0x%03X, ", code);
+ if(i%16==15) av_log(NULL, AV_LOG_DEBUG, "\n");
+ }
+ for(i=0; i<64; i++){
+ int code= vc1_norm6_spec[i][2] + vc1_norm6_spec[i][4];
+ av_log(NULL, AV_LOG_DEBUG, "%2d, ", code);
+ if(i%16==15) av_log(NULL, AV_LOG_DEBUG, "\n");
+ }
+#endif
+ if(!done)
+ {
+ done = 1;
+ INIT_VLC(&vc1_bfraction_vlc, VC1_BFRACTION_VLC_BITS, 23,
+ vc1_bfraction_bits, 1, 1,
+ vc1_bfraction_codes, 1, 1, 1);
+ INIT_VLC(&vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,
+ vc1_norm2_bits, 1, 1,
+ vc1_norm2_codes, 1, 1, 1);
+ INIT_VLC(&vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,
+ vc1_norm6_bits, 1, 1,
+ vc1_norm6_codes, 2, 2, 1);
+ INIT_VLC(&vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,
+ vc1_imode_bits, 1, 1,
+ vc1_imode_codes, 1, 1, 1);
+ for (i=0; i<3; i++)
+ {
+ INIT_VLC(&vc1_ttmb_vlc[i], VC1_TTMB_VLC_BITS, 16,
+ vc1_ttmb_bits[i], 1, 1,
+ vc1_ttmb_codes[i], 2, 2, 1);
+ INIT_VLC(&vc1_ttblk_vlc[i], VC1_TTBLK_VLC_BITS, 8,
+ vc1_ttblk_bits[i], 1, 1,
+ vc1_ttblk_codes[i], 1, 1, 1);
+ INIT_VLC(&vc1_subblkpat_vlc[i], VC1_SUBBLKPAT_VLC_BITS, 15,
+ vc1_subblkpat_bits[i], 1, 1,
+ vc1_subblkpat_codes[i], 1, 1, 1);
+ }
+ for(i=0; i<4; i++)
+ {
+ INIT_VLC(&vc1_4mv_block_pattern_vlc[i], VC1_4MV_BLOCK_PATTERN_VLC_BITS, 16,
+ vc1_4mv_block_pattern_bits[i], 1, 1,
+ vc1_4mv_block_pattern_codes[i], 1, 1, 1);
+ INIT_VLC(&vc1_cbpcy_p_vlc[i], VC1_CBPCY_P_VLC_BITS, 64,
+ vc1_cbpcy_p_bits[i], 1, 1,
+ vc1_cbpcy_p_codes[i], 2, 2, 1);
+ INIT_VLC(&vc1_mv_diff_vlc[i], VC1_MV_DIFF_VLC_BITS, 73,
+ vc1_mv_diff_bits[i], 1, 1,
+ vc1_mv_diff_codes[i], 2, 2, 1);
+ }
+ }
+
+ /* Other defaults */
+ v->pq = -1;
+ v->mvrange = 0; /* 7.1.1.18, p80 */
+
+ return 0;
+}
+
+#if HAS_ADVANCED_PROFILE
+/**
+ * Decode sequence header's Hypothetic Reference Decoder data
+ * @see 6.2.1, p32
+ * @param v The VC1Context to initialize
+ * @param gb A GetBitContext initialized from AVCodecContext extra_data
+ * @return Status
+ */
+static int decode_hrd(VC1Context *v, GetBitContext *gb)
+{
+ int i, num;
+
+ num = 1 + get_bits(gb, 5);
+
+ /*hrd rate*/
+ if (v->hrd_rate || num != v->hrd_num_leaky_buckets)
+ {
+ av_freep(&v->hrd_rate);
+ }
+ if (!v->hrd_rate) v->hrd_rate = av_malloc(num*sizeof(uint16_t));
+ if (!v->hrd_rate) return -1;
+
+ /*hrd buffer*/
+ if (v->hrd_buffer || num != v->hrd_num_leaky_buckets)
+ {
+ av_freep(&v->hrd_buffer);
+ }
+ if (!v->hrd_buffer) v->hrd_buffer = av_malloc(num*sizeof(uint16_t));
+ if (!v->hrd_buffer)
+ {
+ av_freep(&v->hrd_rate);
+ return -1;
+ }
+
+ /*hrd fullness*/
+ if (v->hrd_fullness || num != v->hrd_num_leaky_buckets)
+ {
+ av_freep(&v->hrd_buffer);
+ }
+ if (!v->hrd_fullness) v->hrd_fullness = av_malloc(num*sizeof(uint8_t));
+ if (!v->hrd_fullness)
+ {
+ av_freep(&v->hrd_rate);
+ av_freep(&v->hrd_buffer);
+ return -1;
+ }
+ v->hrd_num_leaky_buckets = num;
+
+ //exponent in base-2 for rate
+ v->bit_rate_exponent = 6 + get_bits(gb, 4);
+ //exponent in base-2 for buffer_size
+ v->buffer_size_exponent = 4 + get_bits(gb, 4);
+
+ for (i=0; i<num; i++)
+ {
+ //mantissae, ordered (if not, use a function ?
+ v->hrd_rate[i] = 1 + get_bits(gb, 16);
+ if (i && v->hrd_rate[i-1]>=v->hrd_rate[i])
+ {
+ av_log(v->s.avctx, AV_LOG_ERROR, "HDR Rates aren't strictly increasing:"
+ "%i vs %i\n", v->hrd_rate[i-1], v->hrd_rate[i]);
+ return -1;
+ }
+ v->hrd_buffer[i] = 1 + get_bits(gb, 16);
+ if (i && v->hrd_buffer[i-1]<v->hrd_buffer[i])
+ {
+ av_log(v->s.avctx, AV_LOG_ERROR, "HDR Buffers aren't decreasing:"
+ "%i vs %i\n", v->hrd_buffer[i-1], v->hrd_buffer[i]);
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/**
+ * Decode sequence header for Advanced Profile
+ * @see Table 2, p18
+ * @see 6.1.7, pp21-27
+ * @param v The VC1Context to initialize
+ * @param gb A GetBitContext initialized from AVCodecContext extra_data
+ * @return Status
+ */
+static int decode_advanced_sequence_header(AVCodecContext *avctx, GetBitContext *gb)
+{
+ VC1Context *v = avctx->priv_data;
+ int nr, dr, aspect_ratio;
+
+ v->postprocflag = get_bits(gb, 1);
+ v->broadcast = get_bits(gb, 1);
+ v->interlace = get_bits(gb, 1);
+
+ v->tfcntrflag = get_bits(gb, 1);
+ v->finterpflag = get_bits(gb, 1); //common
+ v->panscanflag = get_bits(gb, 1);
+ v->reserved = get_bits(gb, 1);
+ if (v->reserved)
+ {
+ av_log(avctx, AV_LOG_ERROR, "RESERVED should be 0 (is %i)\n",
+ v->reserved);
+ return -1;
+ }
+ if (v->extended_mv)
+ v->extended_dmv = get_bits(gb, 1);
+
+ /* 6.1.7, p21 */
+ if (get_bits(gb, 1) /* pic_size_flag */)
+ {
+ avctx->coded_width = get_bits(gb, 12) << 1;
+ avctx->coded_height = get_bits(gb, 12) << 1;
+ if ( get_bits(gb, 1) /* disp_size_flag */)
+ {
+ avctx->width = get_bits(gb, 14);
+ avctx->height = get_bits(gb, 14);
+ }
+
+ /* 6.1.7.4, p23 */
+ if ( get_bits(gb, 1) /* aspect_ratio_flag */)
+ {
+ aspect_ratio = get_bits(gb, 4); //SAR
+ if (aspect_ratio == 0x0F) //FF_ASPECT_EXTENDED
+ {
+ avctx->sample_aspect_ratio.num = 1 + get_bits(gb, 8);
+ avctx->sample_aspect_ratio.den = 1 + get_bits(gb, 8);
+ }
+ else if (aspect_ratio == 0x0E)
+ {
+ av_log(avctx, AV_LOG_DEBUG, "Reserved AR found\n");
+ }
+ else
+ {
+ avctx->sample_aspect_ratio = vc1_pixel_aspect[aspect_ratio];
+ }
+ }
+ }
+ else
+ {
+ avctx->coded_width = avctx->width;
+ avctx->coded_height = avctx->height;
+ }
+
+ /* 6.1.8, p23 */
+ if ( get_bits(gb, 1) /* framerateflag */)
+ {
+ if ( !get_bits(gb, 1) /* framerateind */)
+ {
+ nr = get_bits(gb, 8);
+ dr = get_bits(gb, 4);
+ if (nr<1)
+ {
+ av_log(avctx, AV_LOG_ERROR, "0 is forbidden for FRAMERATENR\n");
+ return -1;
+ }
+ if (nr>5)
+ {
+ av_log(avctx, AV_LOG_ERROR,
+ "Reserved FRAMERATENR %i not handled\n", nr);
+ nr = 5; /* overflow protection */
+ }
+ if (dr<1)
+ {
+ av_log(avctx, AV_LOG_ERROR, "0 is forbidden for FRAMERATEDR\n");
+ return -1;
+ }
+ if (dr>2)
+ {
+ av_log(avctx, AV_LOG_ERROR,
+ "Reserved FRAMERATEDR %i not handled\n", dr);
+ dr = 2; /* overflow protection */
+ }
+ avctx->time_base.num = fps_nr[dr - 1];
+ avctx->time_base.den = fps_nr[nr - 1];
+ }
+ else
+ {
+ nr = get_bits(gb, 16);
+ // 0.03125->2048Hz / 0.03125Hz
+ avctx->time_base.den = 1000000;
+ avctx->time_base.num = 31250*(1+nr);
+ }
+ }
+
+ /* 6.1.9, p25 */
+ if ( get_bits(gb, 1) /* color_format_flag */)
+ {
+ //Chromacity coordinates of color primaries
+ //like ITU-R BT.709-2, BT.470-2, ...
+ v->color_prim = get_bits(gb, 8);
+ if (v->color_prim<1)
+ {
+ av_log(avctx, AV_LOG_ERROR, "0 for COLOR_PRIM is forbidden\n");
+ return -1;
+ }
+ if (v->color_prim == 3 || v->color_prim>6)
+ {
+ av_log(avctx, AV_LOG_DEBUG, "Reserved COLOR_PRIM %i found\n",
+ v->color_prim);
+ return -1;
+ }
+
+ //Opto-electronic transfer characteristics
+ v->transfer_char = get_bits(gb, 8);
+ if (v->transfer_char < 1)
+ {
+ av_log(avctx, AV_LOG_ERROR, "0 for TRAMSFER_CHAR is forbidden\n");
+ return -1;
+ }
+ if (v->transfer_char == 3 || v->transfer_char>8)
+ {
+ av_log(avctx, AV_LOG_DEBUG, "Reserved TRANSFERT_CHAR %i found\n",
+ v->color_prim);
+ return -1;
+ }
+
+ //Matrix coefficient for primariev->YCbCr
+ v->matrix_coef = get_bits(gb, 8);
+ if (v->matrix_coef < 1)
+ {
+ av_log(avctx, AV_LOG_ERROR, "0 for MATRIX_COEF is forbidden\n");
+ return -1;
+ }
+ if ((v->matrix_coef > 2 && v->matrix_coef < 6) || v->matrix_coef > 7)
+ {
+ av_log(avctx, AV_LOG_DEBUG, "Reserved MATRIX_COEF %i found\n",
+ v->color_prim);
+ return -1;
+ }
+ }
+
+ //Hypothetical reference decoder indicator flag
+ v->hrd_param_flag = get_bits(gb, 1);
+ if (v->hrd_param_flag)
+ {
+ if (decode_hrd(v, gb) < 0) return -1;
+ }
+
+ /*reset scaling ranges, 6.2.2 & 6.2.3, p33*/
+ v->range_mapy_flag = 0;
+ v->range_mapuv_flag = 0;
+
+ av_log(avctx, AV_LOG_DEBUG, "Advanced profile not supported yet\n");
+ return -1;
+}
+#endif
+
+/**
+ * Decode Simple/Main Profiles sequence header
+ * @see Figure 7-8, p16-17
+ * @param avctx Codec context
+ * @param gb GetBit context initialized from Codec context extra_data
+ * @return Status
+ */
+static int decode_sequence_header(AVCodecContext *avctx, GetBitContext *gb)
+{
+ VC1Context *v = avctx->priv_data;
+
+ av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32));
+ v->profile = get_bits(gb, 2);
+ if (v->profile == 2)
+ {
+ av_log(avctx, AV_LOG_ERROR, "Profile value 2 is forbidden\n");
+ return -1;
+ }
+
+#if HAS_ADVANCED_PROFILE
+ if (v->profile == PROFILE_ADVANCED)
+ {
+ v->level = get_bits(gb, 3);
+ if(v->level >= 5)
+ {
+ av_log(avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);
+ }
+ v->chromaformat = get_bits(gb, 2);
+ if (v->chromaformat != 1)
+ {
+ av_log(avctx, AV_LOG_ERROR,
+ "Only 4:2:0 chroma format supported\n");
+ return -1;
+ }
+ }
+ else
+#endif
+ {
+ v->res_sm = get_bits(gb, 2); //reserved
+ if (v->res_sm)
+ {
+ av_log(avctx, AV_LOG_ERROR,
+ "Reserved RES_SM=%i is forbidden\n", v->res_sm);
+ return -1;
+ }
+ }
+
+ // (fps-2)/4 (->30)
+ v->frmrtq_postproc = get_bits(gb, 3); //common
+ // (bitrate-32kbps)/64kbps
+ v->bitrtq_postproc = get_bits(gb, 5); //common
+ v->s.loop_filter = get_bits(gb, 1); //common
+ if(v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE)
+ {
+ av_log(avctx, AV_LOG_ERROR,
+ "LOOPFILTER shell not be enabled in simple profile\n");
+ }
+
+#if HAS_ADVANCED_PROFILE
+ if (v->profile < PROFILE_ADVANCED)
+#endif
+ {
+ v->res_x8 = get_bits(gb, 1); //reserved
+ if (v->res_x8)
+ {
+ av_log(avctx, AV_LOG_ERROR,
+ "1 for reserved RES_X8 is forbidden\n");
+ //return -1;
+ }
+ v->multires = get_bits(gb, 1);
+ v->res_fasttx = get_bits(gb, 1);
+ if (!v->res_fasttx)
+ {
+ av_log(avctx, AV_LOG_ERROR,
+ "0 for reserved RES_FASTTX is forbidden\n");
+ //return -1;
+ }
+ }
+
+ v->fastuvmc = get_bits(gb, 1); //common
+ if (!v->profile && !v->fastuvmc)
+ {
+ av_log(avctx, AV_LOG_ERROR,
+ "FASTUVMC unavailable in Simple Profile\n");
+ return -1;
+ }
+ v->extended_mv = get_bits(gb, 1); //common
+ if (!v->profile && v->extended_mv)
+ {
+ av_log(avctx, AV_LOG_ERROR,
+ "Extended MVs unavailable in Simple Profile\n");
+ return -1;
+ }
+ v->dquant = get_bits(gb, 2); //common
+ v->vstransform = get_bits(gb, 1); //common
+
+#if HAS_ADVANCED_PROFILE
+ if (v->profile < PROFILE_ADVANCED)
+#endif
+ {
+ v->res_transtab = get_bits(gb, 1);
+ if (v->res_transtab)
+ {
+ av_log(avctx, AV_LOG_ERROR,
+ "1 for reserved RES_TRANSTAB is forbidden\n");
+ return -1;
+ }
+ }
+
+ v->overlap = get_bits(gb, 1); //common
+
+#if HAS_ADVANCED_PROFILE
+ if (v->profile < PROFILE_ADVANCED)
+#endif
+ {
+ v->s.resync_marker = get_bits(gb, 1);
+ v->rangered = get_bits(gb, 1);
+ if (v->rangered && v->profile == PROFILE_SIMPLE)
+ {
+ av_log(avctx, AV_LOG_DEBUG,
+ "RANGERED should be set to 0 in simple profile\n");
+ }
+ }
+
+ v->s.max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common
+ v->quantizer_mode = get_bits(gb, 2); //common
+
+#if HAS_ADVANCED_PROFILE
+ if (v->profile < PROFILE_ADVANCED)
+#endif
+ {
+ v->finterpflag = get_bits(gb, 1); //common
+ v->res_rtm_flag = get_bits(gb, 1); //reserved
+ if (!v->res_rtm_flag)
+ {
+ av_log(avctx, AV_LOG_ERROR,
+ "0 for reserved RES_RTM_FLAG is forbidden\n");
+ //return -1;
+ }
+#if TRACE
+ av_log(avctx, AV_LOG_INFO,
+ "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
+ "LoopFilter=%i, MultiRes=%i, FastUVMV=%i, Extended MV=%i\n"
+ "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
+ "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
+ v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
+ v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
+ v->rangered, v->vstransform, v->overlap, v->s.resync_marker,
+ v->dquant, v->quantizer_mode, avctx->max_b_frames
+ );
+ return 0;
+#endif
+ }
+#if HAS_ADVANCED_PROFILE
+ else return decode_advanced_sequence_header(avctx, gb);
+#endif
+}
+
+
+#if HAS_ADVANCED_PROFILE
+/** Entry point decoding (Advanced Profile)
+ * @param avctx Codec context
+ * @param gb GetBit context initialized from avctx->extra_data
+ * @return Status
+ */
+static int advanced_entry_point_process(AVCodecContext *avctx, GetBitContext *gb)
+{
+ VC1Context *v = avctx->priv_data;
+ int i;
+ if (v->profile != PROFILE_ADVANCED)
+ {
+ av_log(avctx, AV_LOG_ERROR,
+ "Entry point are only defined in Advanced Profile!\n");
+ return -1; //Only for advanced profile!
+ }
+ if (v->hrd_param_flag)
+ {
+ //Update buffer fullness
+ av_log(avctx, AV_LOG_DEBUG, "Buffer fullness update\n");
+ assert(v->hrd_num_leaky_buckets > 0);
+ for (i=0; i<v->hrd_num_leaky_buckets; i++)
+ v->hrd_fullness[i] = get_bits(gb, 8);
+ }
+ if ((v->range_mapy_flag = get_bits(gb, 1)))
+ {
+ //RANGE_MAPY
+ av_log(avctx, AV_LOG_DEBUG, "RANGE_MAPY\n");
+ v->range_mapy = get_bits(gb, 3);
+ }
+ if ((v->range_mapuv_flag = get_bits(gb, 1)))
+ {
+ //RANGE_MAPUV
+ av_log(avctx, AV_LOG_DEBUG, "RANGE_MAPUV\n");
+ v->range_mapuv = get_bits(gb, 3);
+ }
+ if (v->panscanflag)
+ {
+ //NUMPANSCANWIN
+ v->numpanscanwin = get_bits(gb, 3);
+ av_log(avctx, AV_LOG_DEBUG, "NUMPANSCANWIN: %u\n", v->numpanscanwin);
+ }
+ return 0;
+}
+#endif
+
+/***********************************************************************/
+/**
+ * @defgroup bitplane VC1 Bitplane decoding
+ * @see 8.7, p56
+ * @{
+ */
+
+/** @addtogroup bitplane
+ * Imode types
+ * @{
+ */
+#define IMODE_RAW 0
+#define IMODE_NORM2 1
+#define IMODE_DIFF2 2
+#define IMODE_NORM6 3
+#define IMODE_DIFF6 4
+#define IMODE_ROWSKIP 5
+#define IMODE_COLSKIP 6
+/** @} */ //imode defines
+
+/** Allocate the buffer from a bitplane, given its dimensions
+ * @param bp Bitplane which buffer is to allocate
+ * @param[in] width Width of the buffer
+ * @param[in] height Height of the buffer
+ * @return Status
+ * @todo TODO: Take into account stride
+ * @todo TODO: Allow use of external buffers ?
+ */
+static int alloc_bitplane(BitPlane *bp, int width, int height)
+{
+ if (!bp || bp->width<0 || bp->height<0) return -1;
+ bp->data = (uint8_t*)av_malloc(width*height);
+ if (!bp->data) return -1;
+ bp->width = bp->stride = width;
+ bp->height = height;
+ return 0;
+}
+
+/** Free the bitplane's buffer
+ * @param bp Bitplane which buffer is to free
+ */
+static void free_bitplane(BitPlane *bp)
+{
+ bp->width = bp->stride = bp->height = 0;
+ if (bp->data) av_freep(&bp->data);
+}
+
+/** Decode rows by checking if they are skipped
+ * @param plane Buffer to store decoded bits
+ * @param[in] width Width of this buffer
+ * @param[in] height Height of this buffer
+ * @param[in] stride of this buffer
+ */
+static void decode_rowskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
+ int x, y;
+
+ for (y=0; y<height; y++){
+ if (!get_bits(gb, 1)) //rowskip
+ memset(plane, 0, width);
+ else
+ for (x=0; x<width; x++)
+ plane[x] = get_bits(gb, 1);
+ plane += stride;
+ }
+}
+
+/** Decode columns by checking if they are skipped
+ * @param plane Buffer to store decoded bits
+ * @param[in] width Width of this buffer
+ * @param[in] height Height of this buffer
+ * @param[in] stride of this buffer
+ * @fixme FIXME: Optimize
+ */
+static void decode_colskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
+ int x, y;
+
+ for (x=0; x<width; x++){
+ if (!get_bits(gb, 1)) //colskip
+ for (y=0; y<height; y++)
+ plane[y*stride] = 0;
+ else
+ for (y=0; y<height; y++)
+ plane[y*stride] = get_bits(gb, 1);
+ plane ++;
+ }
+}
+
+/** Decode a bitplane's bits
+ * @param bp Bitplane where to store the decode bits
+ * @param v VC1 context for bit reading and logging
+ * @return Status
+ * @fixme FIXME: Optimize
+ * @todo TODO: Decide if a struct is needed
+ */
+static int bitplane_decoding(BitPlane *bp, VC1Context *v)
+{
+ GetBitContext *gb = &v->s.gb;
+
+ int imode, x, y, code, use_vertical_tile, tile_w, tile_h, offset;
+ uint8_t invert, *planep = bp->data;
+
+ invert = get_bits(gb, 1);
+ imode = get_vlc2(gb, vc1_imode_vlc.table, VC1_IMODE_VLC_BITS, 2);
+
+ bp->is_raw = 0;
+ switch (imode)
+ {
+ case IMODE_RAW:
+ //Data is actually read in the MB layer (same for all tests == "raw")
+ bp->is_raw = 1; //invert ignored
+ return invert;
+ case IMODE_DIFF2:
+ case IMODE_NORM2:
+ if ((bp->height*bp->width) & 1)
+ {
+ *(++planep) = get_bits(gb, 1);
+ offset = x = 1;
+ }
+ else offset = x = 0;
+
+ for (y=0; y<bp->height; y++)
+ {
+ for(; x<bp->width; x+=2)
+ {
+ code = get_vlc2(gb, vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 2);
+ *(++planep) = code&1; //lsb => left
+ *(++planep) = (code>>1)&1; //msb => right
+ }
+ planep += bp->stride-bp->width;
+ if ((bp->width-offset)&1) //Odd number previously processed
+ {
+ code = get_vlc2(gb, vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 2);
+ *planep = code&1;
+ planep += bp->stride-bp->width;
+ *planep = (code>>1)&1; //msb => right
+ offset = x = 1;
+ }
+ else
+ {
+ offset = x = 0;
+ planep += bp->stride-bp->width;
+ }
+ }
+ break;
+ case IMODE_DIFF6:
+ case IMODE_NORM6:
+ use_vertical_tile= bp->height%3==0 && bp->width%3!=0;
+ tile_w= use_vertical_tile ? 2 : 3;
+ tile_h= use_vertical_tile ? 3 : 2;
+
+ for(y= bp->height%tile_h; y< bp->height; y+=tile_h){
+ for(x= bp->width%tile_w; x< bp->width; x+=tile_w){
+ code = get_vlc2(gb, vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
+ if(code<0){
+ av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
+ return -1;
+ }
+ //FIXME following is a pure guess and probably wrong
+ //FIXME A bitplane (0 | !0), so could the shifts be avoided ?
+ planep[x + 0*bp->stride]= (code>>0)&1;
+ planep[x + 1 + 0*bp->stride]= (code>>1)&1;
+ //FIXME Does branch prediction help here?
+ if(use_vertical_tile){
+ planep[x + 0 + 1*bp->stride]= (code>>2)&1;
+ planep[x + 1 + 1*bp->stride]= (code>>3)&1;
+ planep[x + 0 + 2*bp->stride]= (code>>4)&1;
+ planep[x + 1 + 2*bp->stride]= (code>>5)&1;
+ }else{
+ planep[x + 2 + 0*bp->stride]= (code>>2)&1;
+ planep[x + 0 + 1*bp->stride]= (code>>3)&1;
+ planep[x + 1 + 1*bp->stride]= (code>>4)&1;
+ planep[x + 2 + 1*bp->stride]= (code>>5)&1;
+ }
+ }
+ }
+
+ x= bp->width % tile_w;
+ decode_colskip(bp->data , x, bp->height , bp->stride, &v->s.gb);
+ decode_rowskip(bp->data+x, bp->width - x, bp->height % tile_h, bp->stride, &v->s.gb);
+
+ break;
+ case IMODE_ROWSKIP:
+ decode_rowskip(bp->data, bp->width, bp->height, bp->stride, &v->s.gb);
+ break;
+ case IMODE_COLSKIP:
+ decode_colskip(bp->data, bp->width, bp->height, bp->stride, &v->s.gb);
+ break;
+ default: break;
+ }
+
+ /* Applying diff operator */
+ if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6)
+ {
+ planep = bp->data;
+ planep[0] ^= invert;
+ for (x=1; x<bp->width; x++)
+ planep[x] ^= planep[x-1];
+ for (y=1; y<bp->height; y++)
+ {
+ planep += bp->stride;
+ planep[0] ^= planep[-bp->stride];
+ for (x=1; x<bp->width; x++)
+ {
+ if (planep[x-1] != planep[x-bp->stride]) planep[x] ^= invert;
+ else planep[x] ^= planep[x-1];
+ }
+ }
+ }
+ else if (invert)
+ {
+ planep = bp->data;
+ for (x=0; x<bp->width*bp->height; x++) planep[x] = !planep[x]; //FIXME stride
+ }
+ return (imode<<1) + invert;
+}
+/** @} */ //Bitplane group
+
+/***********************************************************************/
+/** VOP Dquant decoding
+ * @param v VC1 Context
+ */
+static int vop_dquant_decoding(VC1Context *v)
+{
+ GetBitContext *gb = &v->s.gb;
+ int pqdiff;
+
+ //variable size
+ if (v->dquant == 2)
+ {
+ pqdiff = get_bits(gb, 3);
+ if (pqdiff == 7) v->altpq = get_bits(gb, 5);
+ else v->altpq = v->pq + pqdiff + 1;
+ }
+ else
+ {
+ v->dquantfrm = get_bits(gb, 1);
+ if ( v->dquantfrm )
+ {
+ v->dqprofile = get_bits(gb, 2);
+ switch (v->dqprofile)
+ {
+ case DQPROFILE_SINGLE_EDGE:
+ case DQPROFILE_DOUBLE_EDGES:
+ v->dqsbedge = get_bits(gb, 2);
+ break;
+ case DQPROFILE_ALL_MBS:
+ v->dqbilevel = get_bits(gb, 1);
+ default: break; //Forbidden ?
+ }
+ if (!v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS)
+ {
+ pqdiff = get_bits(gb, 3);
+ if (pqdiff == 7) v->altpq = get_bits(gb, 5);
+ else v->altpq = v->pq + pqdiff + 1;
+ }
+ }
+ }
+ return 0;
+}
+
+/***********************************************************************/
+/**
+ * @defgroup all_frame_hdr All VC1 profiles frame header
+ * @brief Part of the frame header decoding from all profiles
+ * @warning Only pro/epilog differs between Simple/Main and Advanced => check caller
+ * @{
+ */
+/** B and BI frame header decoding, primary part
+ * @see Tables 11+12, p62-65
+ * @param v VC1 context
+ * @return Status
+ * @warning Also handles BI frames
+ */
+static int decode_b_picture_primary_header(VC1Context *v)
+{
+ GetBitContext *gb = &v->s.gb;
+ int pqindex;
+
+ /* Prolog common to all frametypes should be done in caller */
+ if (v->profile == PROFILE_SIMPLE)
+ {
+ av_log(v->s.avctx, AV_LOG_ERROR, "Found a B frame while in Simple Profile!\n");
+ return FRAME_SKIPPED;
+ }
+ v->bfraction = vc1_bfraction_lut[get_vlc2(gb, vc1_bfraction_vlc.table,
+ VC1_BFRACTION_VLC_BITS, 2)];
+ if (v->bfraction < -1)
+ {
+ av_log(v->s.avctx, AV_LOG_ERROR, "Invalid BFRaction\n");
+ return FRAME_SKIPPED;
+ }
+ else if (!v->bfraction)
+ {
+ /* We actually have a BI frame */
+ v->s.pict_type = BI_TYPE;
+ v->buffer_fullness = get_bits(gb, 7);
+ }
+
+ /* Read the quantization stuff */
+ pqindex = get_bits(gb, 5);
+ if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
+ v->pq = pquant_table[0][pqindex];
+ else
+ {
+ v->pq = pquant_table[v->quantizer_mode-1][pqindex];
+ }
+ if (pqindex < 9) v->halfpq = get_bits(gb, 1);
+ if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
+ v->pquantizer = get_bits(gb, 1);
+#if HAS_ADVANCED_PROFILE
+ if (v->profile == PROFILE_ADVANCED)
+ {
+ if (v->postprocflag) v->postproc = get_bits(gb, 2);
+ if (v->extended_mv == 1 && v->s.pict_type != BI_TYPE)
+ v->mvrange = get_prefix(gb, 0, 3);
+ }
+#endif
+ else
+ {
+ if (v->extended_mv == 1)
+ v->mvrange = get_prefix(gb, 0, 3);
+ }
+ /* Read the MV mode */
+ if (v->s.pict_type != BI_TYPE)
+ {
+ v->mv_mode = get_bits(gb, 1);
+ if (v->pq < 13)
+ {
+ if (!v->mv_mode)
+ {
+ v->mv_mode = get_bits(gb, 2);
+ if (v->mv_mode)
+ av_log(v->s.avctx, AV_LOG_ERROR,
+ "mv_mode for lowquant B frame was %i\n", v->mv_mode);
+ }
+ }
+ else
+ {
+ if (!v->mv_mode)
+ {
+ if (get_bits(gb, 1))
+ av_log(v->s.avctx, AV_LOG_ERROR,
+ "mv_mode for highquant B frame was %i\n", v->mv_mode);
+ }
+ v->mv_mode = 1-v->mv_mode; //To match (pq < 13) mapping
+ }
+ }
+
+ return 0;
+}
+
+/** B and BI frame header decoding, secondary part
+ * @see Tables 11+12, p62-65
+ * @param v VC1 context
+ * @return Status
+ * @warning Also handles BI frames
+ * @warning To call once all MB arrays are allocated
+ * @todo Support Advanced Profile headers
+ */
+static int decode_b_picture_secondary_header(VC1Context *v)
+{
+ GetBitContext *gb = &v->s.gb;
+ int status;
+
+ status = bitplane_decoding(&v->skip_mb_plane, v);
+ if (status < 0) return -1;
+#if TRACE
+ if (v->mv_mode == MV_PMODE_MIXED_MV)
+ {
+ status = bitplane_decoding(&v->mv_type_mb_plane, v);
+ if (status < 0)
+ return -1;
+#if TRACE
+ av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
+ "Imode: %i, Invert: %i\n", status>>1, status&1);
+#endif
+ }
+
+ //bitplane
+ status = bitplane_decoding(&v->direct_mb_plane, v);
+ if (status < 0) return -1;
+#if TRACE
+ av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct plane encoding: "
+ "Imode: %i, Invert: %i\n", status>>1, status&1);
+#endif
+
+ av_log(v->s.avctx, AV_LOG_DEBUG, "Skip MB plane encoding: "
+ "Imode: %i, Invert: %i\n", status>>1, status&1);
+#endif
+
+ /* FIXME: what is actually chosen for B frames ? */
+ v->s.mv_table_index = get_bits(gb, 2); //but using vc1_ tables
+ v->cbpcy_vlc = &vc1_cbpcy_p_vlc[get_bits(gb, 2)];
+
+ if (v->dquant)
+ {
+ vop_dquant_decoding(v);
+ }
+
+ if (v->vstransform)
+ {
+ v->ttmbf = get_bits(gb, 1);
+ if (v->ttmbf)
+ {
+ v->ttfrm = get_bits(gb, 2);
+ av_log(v->s.avctx, AV_LOG_INFO, "Transform used: %ix%i\n",
+ (v->ttfrm & 2) ? 4 : 8, (v->ttfrm & 1) ? 4 : 8);
+ }
+ }
+ /* Epilog (AC/DC syntax) should be done in caller */
+ return 0;
+}
+
+/** I frame header decoding, primary part
+ * @see Tables 5+7, p53-54 and 55-57
+ * @param v VC1 context
+ * @return Status
+ * @todo Support Advanced Profile headers
+ */
+static int decode_i_picture_primary_header(VC1Context *v)
+{
+ GetBitContext *gb = &v->s.gb;
+ int pqindex;
+
+ /* Prolog common to all frametypes should be done in caller */
+ //BF = Buffer Fullness
+ if (v->profile < PROFILE_ADVANCED && get_bits(gb, 7))
+ {
+ av_log(v->s.avctx, AV_LOG_DEBUG, "I BufferFullness not 0\n");
+ }
+
+ /* Quantizer stuff */
+ pqindex = get_bits(gb, 5);
+ if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
+ v->pq = pquant_table[0][pqindex];
+ else
+ {
+ v->pq = pquant_table[v->quantizer_mode-1][pqindex];
+ }
+ if (pqindex < 9) v->halfpq = get_bits(gb, 1);
+ if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
+ v->pquantizer = get_bits(gb, 1);
+ av_log(v->s.avctx, AV_LOG_DEBUG, "I frame: QP=%i (+%i/2)\n",
+ v->pq, v->halfpq);
+ return 0;
+}
+
+/** I frame header decoding, secondary part
+ * @param v VC1 context
+ * @return Status
+ * @warning Not called in A/S/C profiles, it seems
+ * @todo Support Advanced Profile headers
+ */
+static int decode_i_picture_secondary_header(VC1Context *v)
+{
+#if HAS_ADVANCED_PROFILE
+ int status;
+ if (v->profile == PROFILE_ADVANCED)
+ {
+ v->s.ac_pred = get_bits(&v->s.gb, 1);
+ if (v->postprocflag) v->postproc = get_bits(&v->s.gb, 1);
+ /* 7.1.1.34 + 8.5.2 */
+ if (v->overlap && v->pq<9)
+ {
+ v->condover = get_bits(&v->s.gb, 1);
+ if (v->condover)
+ {
+ v->condover = 2+get_bits(&v->s.gb, 1);
+ if (v->condover == 3)
+ {
+ status = bitplane_decoding(&v->over_flags_plane, v);
+ if (status < 0) return -1;
+# if TRACE
+ av_log(v->s.avctx, AV_LOG_DEBUG, "Overflags plane encoding: "
+ "Imode: %i, Invert: %i\n", status>>1, status&1);
+# endif
+ }
+ }
+ }
+ }
+#endif
+
+ /* Epilog (AC/DC syntax) should be done in caller */
+ return 0;
+}
+
+/** P frame header decoding, primary part
+ * @see Tables 5+7, p53-54 and 55-57
+ * @param v VC1 context
+ * @todo Support Advanced Profile headers
+ * @return Status
+ */
+static int decode_p_picture_primary_header(VC1Context *v)
+{
+ /* INTERFRM, FRMCNT, RANGEREDFRM read in caller */
+ GetBitContext *gb = &v->s.gb;
+ int lowquant, pqindex;
+
+ pqindex = get_bits(gb, 5);
+ if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
+ v->pq = pquant_table[0][pqindex];
+ else
+ {
+ v->pq = pquant_table[v->quantizer_mode-1][pqindex];
+ }
+ if (pqindex < 9) v->halfpq = get_bits(gb, 1);
+ if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
+ v->pquantizer = get_bits(gb, 1);
+ av_log(v->s.avctx, AV_LOG_DEBUG, "P Frame: QP=%i (+%i/2)\n",
+ v->pq, v->halfpq);
+ if (v->extended_mv == 1) v->mvrange = get_prefix(gb, 0, 3);
+#if HAS_ADVANCED_PROFILE
+ if (v->profile == PROFILE_ADVANCED)
+ {
+ if (v->postprocflag) v->postproc = get_bits(gb, 1);
+ }
+ else
+#endif
+ if (v->multires) v->respic = get_bits(gb, 2);
+ lowquant = (v->pquantizer>12) ? 0 : 1;
+ v->mv_mode = mv_pmode_table[lowquant][get_prefix(gb, 1, 4)];
+ if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
+ {
+ v->mv_mode2 = mv_pmode_table[lowquant][get_prefix(gb, 1, 3)];
+ v->lumscale = get_bits(gb, 6);
+ v->lumshift = get_bits(gb, 6);
+ }
+ return 0;
+}
+
+/** P frame header decoding, secondary part
+ * @see Tables 5+7, p53-54 and 55-57
+ * @param v VC1 context
+ * @warning To call once all MB arrays are allocated
+ * @return Status
+ */
+static int decode_p_picture_secondary_header(VC1Context *v)
+{
+ GetBitContext *gb = &v->s.gb;
+ int status = 0;
+ if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
+ v->mv_mode2 == MV_PMODE_MIXED_MV)
+ || v->mv_mode == MV_PMODE_MIXED_MV)
+ {
+ status = bitplane_decoding(&v->mv_type_mb_plane, v);
+ if (status < 0) return -1;
+#if TRACE
+ av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
+ "Imode: %i, Invert: %i\n", status>>1, status&1);
+#endif
+ }
+
+ status = bitplane_decoding(&v->skip_mb_plane, v);
+ if (status < 0) return -1;
+#if TRACE
+ av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
+ "Imode: %i, Invert: %i\n", status>>1, status&1);
+#endif
+
+ /* Hopefully this is correct for P frames */
+ v->s.mv_table_index =get_bits(gb, 2); //but using vc1_ tables
+ v->cbpcy_vlc = &vc1_cbpcy_p_vlc[get_bits(gb, 2)];
+
+ if (v->dquant)
+ {
+ av_log(v->s.avctx, AV_LOG_INFO, "VOP DQuant info\n");
+ vop_dquant_decoding(v);
+ }
+
+ v->ttfrm = 0; //FIXME Is that so ?
+ if (v->vstransform)
+ {
+ v->ttmbf = get_bits(gb, 1);
+ if (v->ttmbf)
+ {
+ v->ttfrm = get_bits(gb, 2);
+ av_log(v->s.avctx, AV_LOG_INFO, "Transform used: %ix%i\n",
+ (v->ttfrm & 2) ? 4 : 8, (v->ttfrm & 1) ? 4 : 8);
+ }
+ }
+ /* Epilog (AC/DC syntax) should be done in caller */
+ return 0;
+}
+/** @} */ //End of group all_frm_hdr
+
+
+/***********************************************************************/
+/**
+ * @defgroup std_frame_hdr VC1 Simple/Main Profiles header decoding
+ * @brief Part of the frame header decoding belonging to Simple/Main Profiles
+ * @warning Only pro/epilog differs between Simple/Main and Advanced =>
+ * check caller
+ * @{
+ */
+
+/** Frame header decoding, first part, in Simple and Main profiles
+ * @see Tables 5+7, p53-54 and 55-57
+ * @param v VC1 context
+ * @todo FIXME: RANGEREDFRM element not read if BI frame from Table6, P54
+ * However, 7.1.1.8 says "all frame types, for main profiles"
+ * @return Status
+ */
+static int standard_decode_picture_primary_header(VC1Context *v)
+{
+ GetBitContext *gb = &v->s.gb;
+ int status = 0;
+
+ if (v->finterpflag) v->interpfrm = get_bits(gb, 1);
+ skip_bits(gb, 2); //framecnt unused
+ if (v->rangered) v->rangeredfrm = get_bits(gb, 1);
+ v->s.pict_type = get_bits(gb, 1);
+ if (v->s.avctx->max_b_frames)
+ {
+ if (!v->s.pict_type)
+ {
+ if (get_bits(gb, 1)) v->s.pict_type = I_TYPE;
+ else v->s.pict_type = B_TYPE;
+ }
+ else v->s.pict_type = P_TYPE;
+ }
+ else v->s.pict_type++;
+
+ switch (v->s.pict_type)
+ {
+ case I_TYPE: status = decode_i_picture_primary_header(v); break;
+ case P_TYPE: status = decode_p_picture_primary_header(v); break;
+ case BI_TYPE: //Same as B
+ case B_TYPE: status = decode_b_picture_primary_header(v); break;
+ }
+
+ if (status == FRAME_SKIPPED)
+ {
+ av_log(v->s.avctx, AV_LOG_INFO, "Skipping frame...\n");
+ return status;
+ }
+ return 0;
+}
+
+/** Frame header decoding, secondary part
+ * @param v VC1 context
+ * @warning To call once all MB arrays are allocated
+ * @return Status
+ */
+static int standard_decode_picture_secondary_header(VC1Context *v)
+{
+ GetBitContext *gb = &v->s.gb;
+ int status = 0;
+
+ switch (v->s.pict_type)
+ {
+ case P_TYPE: status = decode_p_picture_secondary_header(v); break;
+ case B_TYPE: status = decode_b_picture_secondary_header(v); break;
+ case BI_TYPE:
+ case I_TYPE: break; //Nothing needed as it's done in the epilog
+ }
+ if (status < 0) return FRAME_SKIPPED;
+
+ /* AC Syntax */
+ v->c_ac_table_index = decode012(gb);
+ if (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
+ {
+ v->y_ac_table_index = decode012(gb);
+ }
+ /* DC Syntax */
+ v->s.dc_table_index = decode012(gb);
+
+ return 0;
+}
+/** @} */ //End for group std_frame_hdr
+
+#if HAS_ADVANCED_PROFILE
+/***********************************************************************/
+/**
+ * @defgroup adv_frame_hdr VC1 Advanced Profile header decoding
+ * @brief Part of the frame header decoding belonging to Advanced Profiles
+ * @warning Only pro/epilog differs between Simple/Main and Advanced =>
+ * check caller
+ * @{
+ */
+/** Frame header decoding, primary part
+ * @param v VC1 context
+ * @return Status
+ */
+static int advanced_decode_picture_primary_header(VC1Context *v)
+{
+ GetBitContext *gb = &v->s.gb;
+ static const int type_table[4] = { P_TYPE, B_TYPE, I_TYPE, BI_TYPE };
+ int type;
+
+ if (v->interlace)
+ {
+ v->fcm = get_bits(gb, 1);
+ if (v->fcm) v->fcm = 2+get_bits(gb, 1);
+ }
+
+ type = get_prefix(gb, 0, 4);
+ if (type > 4 || type < 0) return FRAME_SKIPPED;
+ v->s.pict_type = type_table[type];
+ av_log(v->s.avctx, AV_LOG_INFO, "AP Frame Type: %i\n", v->s.pict_type);
+
+ if (v->tfcntrflag) v->tfcntr = get_bits(gb, 8);
+ if (v->broadcast)
+ {
+ if (!v->interlace) v->rptfrm = get_bits(gb, 2);
+ else
+ {
+ v->tff = get_bits(gb, 1);
+ v->rff = get_bits(gb, 1);
+ }
+ }
+
+ if (v->panscanflag)
+ {
+#if 0
+ for (i=0; i<v->numpanscanwin; i++)
+ {
+ v->topleftx[i] = get_bits(gb, 16);
+ v->toplefty[i] = get_bits(gb, 16);
+ v->bottomrightx[i] = get_bits(gb, 16);
+ v->bottomrighty[i] = get_bits(gb, 16);
+ }
+#else
+ skip_bits(gb, 16*4*v->numpanscanwin);
+#endif
+ }
+ v->s.no_rounding = !get_bits(gb, 1);
+ v->uvsamp = get_bits(gb, 1);
+ if (v->finterpflag == 1) v->interpfrm = get_bits(gb, 1);
+
+ switch(v->s.pict_type)
+ {
+ case I_TYPE: if (decode_i_picture_primary_header(v) < 0) return -1;
+ case P_TYPE: if (decode_p_picture_primary_header(v) < 0) return -1;
+ case BI_TYPE:
+ case B_TYPE: if (decode_b_picture_primary_header(v) < 0) return FRAME_SKIPPED;
+ default: return -1;
+ }
+}
+
+/** Frame header decoding, secondary part
+ * @param v VC1 context
+ * @return Status
+ */
+static int advanced_decode_picture_secondary_header(VC1Context *v)
+{
+ GetBitContext *gb = &v->s.gb;
+ int status = 0;
+
+ switch(v->s.pict_type)
+ {
+ case P_TYPE: status = decode_p_picture_secondary_header(v); break;
+ case B_TYPE: status = decode_b_picture_secondary_header(v); break;
+ case BI_TYPE:
+ case I_TYPE: status = decode_i_picture_secondary_header(v); break;
+ }
+ if (status<0) return FRAME_SKIPPED;
+
+ /* AC Syntax */
+ v->c_ac_table_index = decode012(gb);
+ if (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
+ {
+ v->y_ac_table_index = decode012(gb);
+ }
+ /* DC Syntax */
+ v->s.dc_table_index = decode012(gb);
+
+ return 0;
+}
+#endif
+/** @} */ //End for adv_frame_hdr
+
+/***********************************************************************/
+/**
+ * @defgroup block VC1 Block-level functions
+ * @see 7.1.4, p91 and 8.1.1.7, p(1)04
+ * @todo TODO: Integrate to MpegEncContext facilities
+ * @{
+ */
+
+/**
+ * @def GET_MQUANT
+ * @brief Get macroblock-level quantizer scale
+ * @warning XXX: qdiff to the frame quant, not previous quant ?
+ * @fixme XXX: Don't know how to initialize mquant otherwise in last case
+ */
+#define GET_MQUANT() \
+ if (v->dquantfrm) \
+ { \
+ if (v->dqprofile == DQPROFILE_ALL_MBS) \
+ { \
+ if (v->dqbilevel) \
+ { \
+ mquant = (get_bits(gb, 1)) ? v->pq : v->altpq; \
+ } \
+ else \
+ { \
+ mqdiff = get_bits(gb, 3); \
+ if (mqdiff != 7) mquant = v->pq + mqdiff; \
+ else mquant = get_bits(gb, 5); \
+ } \
+ } \
+ else mquant = v->pq; \
+ }
+
+/**
+ * @def GET_MVDATA(_dmv_x, _dmv_y)
+ * @brief Get MV differentials
+ * @see MVDATA decoding from 8.3.5.2, p(1)20
+ * @param _dmv_x Horizontal differential for decoded MV
+ * @param _dmv_y Vertical differential for decoded MV
+ * @todo TODO: Use MpegEncContext arrays to store them
+ */
+#define GET_MVDATA(_dmv_x, _dmv_y) \
+ index = 1 + get_vlc2(gb, vc1_mv_diff_vlc[s->mv_table_index].table,\
+ VC1_MV_DIFF_VLC_BITS, 2); \
+ if (index > 36) \
+ { \
+ mb_has_coeffs = 1; \
+ index -= 37; \
+ } \
+ else mb_has_coeffs = 0; \
+ s->mb_intra = 0; \
+ if (!index) { _dmv_x = _dmv_y = 0; } \
+ else if (index == 35) \
+ { \
+ _dmv_x = get_bits(gb, v->k_x); \
+ _dmv_y = get_bits(gb, v->k_y); \
+ s->mb_intra = 1; \
+ } \
+ else \
+ { \
+ index1 = index%6; \
+ if (s->mspel && index1 == 5) val = 1; \
+ else val = 0; \
+ val = get_bits(gb, size_table[index1] - val); \
+ sign = 0 - (val&1); \
+ _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign; \
+ \
+ index1 = index/6; \
+ if (s->mspel && index1 == 5) val = 1; \
+ else val = 0; \
+ val = get_bits(gb, size_table[index1] - val); \
+ sign = 0 - (val&1); \
+ _dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign; \
+ }
+
+/** Get predicted DC value
+ * prediction dir: left=0, top=1
+ * @param s MpegEncContext
+ * @param[in] n block index in the current MB
+ * @param dc_val_ptr Pointer to DC predictor
+ * @param dir_ptr Prediction direction for use in AC prediction
+ * @todo TODO: Actually do it the VC1 way
+ * @todo TODO: Handle properly edges
+ */
+static inline int vc1_pred_dc(MpegEncContext *s, int n,
+ uint16_t **dc_val_ptr, int *dir_ptr)
+{
+ int a, b, c, wrap, pred, scale;
+ int16_t *dc_val;
+ static const uint16_t dcpred[31] = {
+ 1024, 512, 341, 256, 205, 171, 146, 128,
+ 114, 102, 93, 85, 79, 73, 68, 64,
+ 60, 57, 54, 51, 49, 47, 45, 43,
+ 41, 39, 38, 37, 35, 34, 33
+ };
+
+ /* find prediction - wmv3_dc_scale always used here in fact */
+ if (n < 4) scale = s->y_dc_scale;
+ else scale = s->c_dc_scale;
+
+ wrap = s->block_wrap[n];
+ dc_val= s->dc_val[0] + s->block_index[n];
+
+ /* B C
+ * A X
+ */
+ a = dc_val[ - 1];
+ b = dc_val[ - 1 - wrap];
+ c = dc_val[ - wrap];
+
+ /* XXX: Rule B is used only for I and BI frames in S/M/C profile
+ * with overlap filtering off
+ */
+ if ((s->pict_type == I_TYPE || s->pict_type == BI_TYPE) &&
+ 1 /* XXX: overlap filtering off */)
+ {
+ /* Set outer values */
+ if (s->first_slice_line && n!=2) b=c=dcpred[scale];
+ if (s->mb_x == 0) b=a=dcpred[scale];
+ }
+ else
+ {
+ /* Set outer values */
+ if (s->first_slice_line && n!=2) b=c=0;
+ if (s->mb_x == 0) b=a=0;
+
+ /* XXX: Rule A needs to know if blocks are inter or intra :/ */
+ if (0)
+ {
+ /* update predictor */
+ *dc_val_ptr = &dc_val[0];
+ dir_ptr = 0;
+ return a;
+ }
+ }
+
+ if (abs(a - b) <= abs(b - c)) {
+ pred = c;
+ *dir_ptr = 1;
+ } else {
+ pred = a;
+ *dir_ptr = 0;
+ }
+
+ /* update predictor */
+ *dc_val_ptr = &dc_val[0];
+ return pred;
+}
+
+/** Decode one block, inter or intra
+ * @param v The VC1 context
+ * @param block 8x8 DCT block
+ * @param n Block index in the current MB (<4=>luma)
+ * @param coded If the block is coded
+ * @param mquant Quantizer step for the current block
+ * @see Inter TT: Table 21, p73 + p91-85
+ * @see Intra TT: Table 20, p72 + p(1)05-(1)07
+ * @todo TODO: Process the blocks
+ * @todo TODO: Use M$ MPEG-4 cbp prediction
+ */
+static int vc1_decode_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant)
+{
+ GetBitContext *gb = &v->s.gb;
+ MpegEncContext *s = &v->s;
+ int ttblk; /* Transform Type per Block */
+ int subblkpat; /* Sub-block Transform Type Pattern */
+ int dc_pred_dir; /* Direction of the DC prediction used */
+ int run_diff, i;
+
+ /* XXX: Guard against dumb values of mquant */
+ mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );
+
+ /* Set DC scale - y and c use the same */
+ s->y_dc_scale = s->y_dc_scale_table[mquant];
+ s->c_dc_scale = s->c_dc_scale_table[mquant];
+
+ if (s->mb_intra)
+ {
+ int dcdiff;
+ uint16_t *dc_val;
+
+ /* Get DC differential */
+ if (n < 4) {
+ dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
+ } else {
+ dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
+ }
+ if (dcdiff < 0){
+ av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
+ return -1;
+ }
+ if (dcdiff)
+ {
+ if (dcdiff == 119 /* ESC index value */)
+ {
+ /* TODO: Optimize */
+ if (mquant == 1) dcdiff = get_bits(gb, 10);
+ else if (mquant == 2) dcdiff = get_bits(gb, 9);
+ else dcdiff = get_bits(gb, 8);
+ }
+ else
+ {
+ if (mquant == 1)
+ dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;
+ else if (mquant == 2)
+ dcdiff = (dcdiff<<1) + get_bits(gb, 1) - 1;
+ }
+ if (get_bits(gb, 1))
+ dcdiff = -dcdiff;
+ }
+
+ /* Prediction */
+ dcdiff += vc1_pred_dc(s, n, &dc_val, &dc_pred_dir);
+ *dc_val = dcdiff;
+ /* Store the quantized DC coeff, used for prediction */
+
+ if (n < 4) {
+ block[0] = dcdiff * s->y_dc_scale;
+ } else {
+ block[0] = dcdiff * s->c_dc_scale;
+ }
+ if (block[0] < 0) {
+#if TRACE
+ //av_log(s->avctx, AV_LOG_ERROR, "DC=%i<0\n", dcdiff);
+#endif
+ //return -1;
+ }
+ /* Skip ? */
+ run_diff = 0;
+ i = 0;
+ if (!coded) {
+ goto not_coded;
+ }
+ }
+ else
+ {
+ mquant = v->pq;
+
+ /* Get TTBLK */
+ if (v->ttmb < 8) /* per block */
+ ttblk = get_vlc2(gb, vc1_ttblk_vlc[v->tt_index].table, VC1_TTBLK_VLC_BITS, 2);
+ else /* Per frame */
+ ttblk = 0; //FIXME, depends on ttfrm
+
+ /* Get SUBBLKPAT */
+ if (ttblk == v->ttblk4x4) /* 4x4 transform for that qp value */
+ subblkpat = 1+get_vlc2(gb, vc1_subblkpat_vlc[v->tt_index].table,
+ VC1_SUBBLKPAT_VLC_BITS, 2);
+ else /* All others: 8x8, 4x8, 8x4 */
+ subblkpat = decode012(gb);
+ }
+
+ //TODO AC Decoding
+ i = 63; //XXX: nothing done yet
+
+
+ not_coded:
+ if (s->mb_intra) {
+ mpeg4_pred_ac(s, block, n, dc_pred_dir);
+ if (s->ac_pred) {
+ i = 63; /* XXX: not optimal */
+ }
+ }
+ if(i>0) i=63; //FIXME/XXX optimize
+ s->block_last_index[n] = i;
+ return 0;
+}
+
+/** @} */ //End for group block
+
+/***********************************************************************/
+/**
+ * @defgroup std_mb VC1 Macroblock-level functions in Simple/Main Profiles
+ * @see 7.1.4, p91 and 8.1.1.7, p(1)04
+ * @todo TODO: Integrate to MpegEncContext facilities
+ * @{
+ */
+
+static inline int vc1_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)
+{
+ int xy, wrap, pred, a, b, c;
+
+ xy = s->block_index[n];
+ wrap = s->b8_stride;
+
+ /* B C
+ * A X
+ */
+ a = s->coded_block[xy - 1 ];
+ b = s->coded_block[xy - 1 - wrap];
+ c = s->coded_block[xy - wrap];
+
+ if (b == c) {
+ pred = a;
+ } else {
+ pred = c;
+ }
+
+ /* store value */
+ *coded_block_ptr = &s->coded_block[xy];
+
+ return pred;
+}
+
+/** Decode one I-frame MB (in Simple/Main profile)
+ * @todo TODO: Extend to AP
+ */
+static int vc1_decode_i_mb(VC1Context *v, DCTELEM block[6][64])
+{
+ int i, cbp, val;
+ uint8_t *coded_val;
+// uint32_t * const mb_type_ptr= &v->s.current_picture.mb_type[ v->s.mb_x + v->s.mb_y*v->s.mb_stride ];
+
+ v->s.mb_intra = 1;
+ cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
+ if (cbp < 0) return -1;
+ v->s.ac_pred = get_bits(&v->s.gb, 1);
+
+ for (i=0; i<6; i++)
+ {
+ val = ((cbp >> (5 - i)) & 1);
+ if (i < 4) {
+ int pred = vc1_coded_block_pred(&v->s, i, &coded_val);
+ val = val ^ pred;
+ *coded_val = val;
+ }
+ cbp |= val << (5 - i);
+ if (vc1_decode_block(v, block[i], i, val, v->pq) < 0) //FIXME Should be mquant
+ {
+ av_log(v->s.avctx, AV_LOG_ERROR,
+ "\nerror while decoding block: %d x %d (%d)\n", v->s.mb_x, v->s.mb_y, i);
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/** Decode one P-frame MB (in Simple/Main profile)
+ * @todo TODO: Extend to AP
+ * @fixme FIXME: DC value for inter blocks not set
+ */
+static int vc1_decode_p_mb(VC1Context *v, DCTELEM block[6][64])
+{
+ MpegEncContext *s = &v->s;
+ GetBitContext *gb = &s->gb;
+ int i, mb_offset = s->mb_x + s->mb_y*s->mb_width; /* XXX: mb_stride */
+ int cbp; /* cbp decoding stuff */
+ int hybrid_pred; /* Prediction types */
+ int mv_mode_bit = 0;
+ int mqdiff, mquant; /* MB quantization */
+ int ttmb; /* MB Transform type */
+ int status;
+ uint8_t *coded_val;
+
+ static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },
+ offset_table[6] = { 0, 1, 3, 7, 15, 31 };
+ int mb_has_coeffs = 1; /* last_flag */
+ int dmv_x, dmv_y; /* Differential MV components */
+ int index, index1; /* LUT indices */
+ int val, sign; /* temp values */
+
+ mquant = v->pq; /* Loosy initialization */
+
+ if (v->mv_type_mb_plane.is_raw)
+ v->mv_type_mb_plane.data[mb_offset] = get_bits(gb, 1);
+ if (v->skip_mb_plane.is_raw)
+ v->skip_mb_plane.data[mb_offset] = get_bits(gb, 1);
+ if (!mv_mode_bit) /* 1MV mode */
+ {
+ if (!v->skip_mb_plane.data[mb_offset])
+ {
+ GET_MVDATA(dmv_x, dmv_y);
+
+ /* hybrid mv pred, 8.3.5.3.4 */
+ if (v->mv_mode == MV_PMODE_1MV ||
+ v->mv_mode == MV_PMODE_MIXED_MV)
+ hybrid_pred = get_bits(gb, 1);
+ /* FIXME Set DC val for inter block ? */
+ if (s->mb_intra && !mb_has_coeffs)
+ {
+ GET_MQUANT();
+ s->ac_pred = get_bits(gb, 1);
+ /* XXX: how to handle cbp ? */
+ cbp = 0;
+ for (i=0; i<6; i++)
+ {
+ s->coded_block[s->block_index[i]] = 0;
+ vc1_decode_block(v, block[i], i, 0, mquant);
+ }
+ return 0;
+ }
+ else if (mb_has_coeffs)
+ {
+ if (s->mb_intra) s->ac_pred = get_bits(gb, 1);
+ cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
+ GET_MQUANT();
+ }
+ else
+ {
+ mquant = v->pq;
+ /* XXX: how to handle cbp ? */
+ /* XXX: how to set values for following predictions ? */
+ cbp = 0;
+ }
+
+ if (!v->ttmbf)
+ ttmb = get_vlc2(gb, vc1_ttmb_vlc[v->tt_index].table,
+ VC1_TTMB_VLC_BITS, 12);
+
+ for (i=0; i<6; i++)
+ {
+ val = ((cbp >> (5 - i)) & 1);
+ if (i < 4) {
+ int pred = vc1_coded_block_pred(&v->s, i, &coded_val);
+ val = val ^ pred;
+ *coded_val = val;
+ }
+ vc1_decode_block(v, block[i], i, val, mquant); //FIXME
+ }
+ }
+ else //Skipped
+ {
+ /* hybrid mv pred, 8.3.5.3.4 */
+ if (v->mv_mode == MV_PMODE_1MV ||
+ v->mv_mode == MV_PMODE_MIXED_MV)
+ hybrid_pred = get_bits(gb, 1);
+
+ /* TODO: blah */
+ return 0;
+ }
+ } //1MV mode
+ else //4MV mode
+ {
+ if (!v->skip_mb_plane.data[mb_offset] /* unskipped MB */)
+ {
+ /* Get CBPCY */
+ cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
+ for (i=0; i<6; i++)
+ {
+ val = ((cbp >> (5 - i)) & 1);
+ if (i < 4) {
+ int pred = vc1_coded_block_pred(&v->s, i, &coded_val);
+ val = val ^ pred;
+ *coded_val = val;
+ }
+ if (i<4 && val)
+ {
+ GET_MVDATA(dmv_x, dmv_y);
+ }
+ if (v->mv_mode == MV_PMODE_MIXED_MV /* Hybrid pred */)
+ hybrid_pred = get_bits(gb, 1);
+ GET_MQUANT();
+
+ if (s->mb_intra /* One of the 4 blocks is intra */ &&
+ index /* non-zero pred for that block */)
+ s->ac_pred = get_bits(gb, 1);
+ if (!v->ttmbf)
+ ttmb = get_vlc2(gb, vc1_ttmb_vlc[v->tt_index].table,
+ VC1_TTMB_VLC_BITS, 12);
+ status = vc1_decode_block(v, block[i], i, val, mquant);
+ }
+ return status;
+ }
+ else //Skipped MB
+ {
+ /* XXX: Skipped => cbp=0 and mquant doesn't matter ? */
+ for (i=0; i<4; i++)
+ {
+ if (v->mv_mode == MV_PMODE_MIXED_MV /* Hybrid pred */)
+ hybrid_pred = get_bits(gb, 1);
+ vc1_decode_block(v, block[i], i, 0, v->pq); //FIXME
+ }
+ vc1_decode_block(v, block[4], 4, 0, v->pq); //FIXME
+ vc1_decode_block(v, block[5], 5, 0, v->pq); //FIXME
+ /* TODO: blah */
+ return 0;
+ }
+ }
+
+ /* Should never happen */
+ return -1;
+}
+
+/** Decode one B-frame MB (in Simple/Main profile)
+ * @todo TODO: Extend to AP
+ * @warning XXX: Used for decoding BI MBs
+ * @fixme FIXME: DC value for inter blocks not set
+ */
+static int vc1_decode_b_mb(VC1Context *v, DCTELEM block[6][64])
+{
+ MpegEncContext *s = &v->s;
+ GetBitContext *gb = &v->s.gb;
+ int mb_offset, i /* MB / B postion information */;
+ int b_mv_type = BMV_TYPE_BACKWARD;
+ int mquant, mqdiff; /* MB quant stuff */
+ int ttmb; /* MacroBlock transform type */
+
+ static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },
+ offset_table[6] = { 0, 1, 3, 7, 15, 31 };
+ int mb_has_coeffs = 1; /* last_flag */
+ int dmv1_x, dmv1_y, dmv2_x, dmv2_y; /* Differential MV components */
+ int index, index1; /* LUT indices */
+ int val, sign; /* MVDATA temp values */
+
+ mb_offset = s->mb_width*s->mb_y + s->mb_x; //FIXME: arrays aren't using stride
+
+ if (v->direct_mb_plane.is_raw)
+ v->direct_mb_plane.data[mb_offset] = get_bits(gb, 1);
+ if (v->skip_mb_plane.is_raw)
+ v->skip_mb_plane.data[mb_offset] = get_bits(gb, 1);
+
+ if (!v->direct_mb_plane.data[mb_offset])
+ {
+ if (v->skip_mb_plane.data[mb_offset])
+ {
+ b_mv_type = decode012(gb);
+ if (v->bfraction > 420 /*1/2*/ &&
+ b_mv_type < 3) b_mv_type = 1-b_mv_type;
+ }
+ else
+ {
+ GET_MVDATA(dmv1_x, dmv1_y);
+ if (!s->mb_intra /* b_mv1 tells not intra */)
+ {
+ b_mv_type = decode012(gb);
+ if (v->bfraction > 420 /*1/2*/ &&
+ b_mv_type < 3) b_mv_type = 1-b_mv_type;
+ }
+ }
+ }
+ if (!v->skip_mb_plane.data[mb_offset])
+ {
+ if (mb_has_coeffs /* BMV1 == "last" */)
+ {
+ GET_MQUANT();
+ if (s->mb_intra /* intra mb */)
+ s->ac_pred = get_bits(gb, 1);
+ }
+ else
+ {
+ /* if bmv1 tells MVs are interpolated */
+ if (b_mv_type == BMV_TYPE_INTERPOLATED)
+ {
+ GET_MVDATA(dmv2_x, dmv2_y);
+ mquant = v->pq; //FIXME: initialization not necessary ?
+ }
+ /* GET_MVDATA has reset some stuff */
+ if (mb_has_coeffs /* b_mv2 == "last" */)
+ {
+ if (s->mb_intra /* intra_mb */)
+ s->ac_pred = get_bits(gb, 1);
+ GET_MQUANT();
+ }
+ }
+ }
+
+ //End1
+ if (v->ttmbf)
+ ttmb = get_vlc2(gb, vc1_ttmb_vlc[v->tt_index].table,
+ VC1_TTMB_VLC_BITS, 12);
+
+ //End2
+ for (i=0; i<6; i++)
+ {
+ vc1_decode_block(v, block[i], i, 0 /*cbp[i]*/, mquant); //FIXME
+ }
+ return 0;
+}
+
+/** Decode all MBs for an I frame in Simple/Main profile
+ * @todo TODO: Move out of the loop the picture type case?
+ (branch prediction should help there though)
+ */
+static int standard_decode_mbs(VC1Context *v)
+{
+ MpegEncContext *s = &v->s;
+
+ /* Set transform type info depending on pq */
+ if (v->pq < 5)
+ {
+ v->tt_index = 0;
+ v->ttblk4x4 = 3;
+ }
+ else if (v->pq < 13)
+ {
+ v->tt_index = 1;
+ v->ttblk4x4 = 3;
+ }
+ else
+ {
+ v->tt_index = 2;
+ v->ttblk4x4 = 2;
+ }
+
+ if (s->pict_type != I_TYPE)
+ {
+ /* Select proper long MV range */
+ switch (v->mvrange)
+ {
+ case 1: v->k_x = 10; v->k_y = 9; break;
+ case 2: v->k_x = 12; v->k_y = 10; break;
+ case 3: v->k_x = 13; v->k_y = 11; break;
+ default: /*case 0 too */ v->k_x = 9; v->k_y = 8; break;
+ }
+
+ s->mspel = v->mv_mode & 1; //MV_PMODE is HPEL
+ v->k_x -= s->mspel;
+ v->k_y -= s->mspel;
+ }
+
+ for (s->mb_y=0; s->mb_y<s->mb_height; s->mb_y++)
+ {
+ for (s->mb_x=0; s->mb_x<s->mb_width; s->mb_x++)
+ {
+ //FIXME Get proper MB DCTELEM
+ //TODO Move out of the loop
+ switch (s->pict_type)
+ {
+ case I_TYPE: vc1_decode_i_mb(v, s->block); break;
+ case P_TYPE: vc1_decode_p_mb(v, s->block); break;
+ case BI_TYPE:
+ case B_TYPE: vc1_decode_b_mb(v, s->block); break;
+ }
+ }
+ //Add a check for overconsumption ?
+ }
+ return 0;
+}
+/** @} */ //End for group std_mb
+
+#if HAS_ADVANCED_PROFILE
+/***********************************************************************/
+/**
+ * @defgroup adv_mb VC1 Macroblock-level functions in Advanced Profile
+ * @todo TODO: Integrate to MpegEncContext facilities
+ * @todo TODO: Code P, B and BI
+ * @{
+ */
+static int advanced_decode_i_mbs(VC1Context *v)
+{
+ MpegEncContext *s = &v->s;
+ GetBitContext *gb = &v->s.gb;
+ int mqdiff, mquant, mb_offset = 0, over_flags_mb = 0;
+
+ for (s->mb_y=0; s->mb_y<s->mb_height; s->mb_y++)
+ {
+ for (s->mb_x=0; s->mb_x<s->mb_width; s->mb_x++)
+ {
+ if (v->ac_pred_plane.is_raw)
+ s->ac_pred = get_bits(gb, 1);
+ else
+ s->ac_pred = v->ac_pred_plane.data[mb_offset];
+ if (v->condover == 3 && v->over_flags_plane.is_raw)
+ over_flags_mb = get_bits(gb, 1);
+ GET_MQUANT();
+
+ /* TODO: lots */
+ }
+ mb_offset++;
+ }
+ return 0;
+}
+/** @} */ //End for group adv_mb
+#endif
+
+/** Initialize a VC1/WMV3 decoder
+ * @todo TODO: Handle VC-1 IDUs (Transport level?)
+ * @todo TODO: Decypher remaining bits in extra_data
+ */
+static int vc1_decode_init(AVCodecContext *avctx)
+{
+ VC1Context *v = avctx->priv_data;
+ MpegEncContext *s = &v->s;
+ GetBitContext gb;
+
+ if (!avctx->extradata_size || !avctx->extradata) return -1;
+ avctx->pix_fmt = PIX_FMT_YUV420P;
+ v->s.avctx = avctx;
+
+ if(ff_h263_decode_init(avctx) < 0)
+ return -1;
+ if (vc1_init_common(v) < 0) return -1;
+
+ av_log(avctx, AV_LOG_INFO, "This decoder is not supposed to produce picture. Dont report this as a bug!\n");
+
+ avctx->coded_width = avctx->width;
+ avctx->coded_height = avctx->height;
+ if (avctx->codec_id == CODEC_ID_WMV3)
+ {
+ int count = 0;
+
+ // looks like WMV3 has a sequence header stored in the extradata
+ // advanced sequence header may be before the first frame
+ // the last byte of the extradata is a version number, 1 for the
+ // samples we can decode
+
+ init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);
+
+ if (decode_sequence_header(avctx, &gb) < 0)
+ return -1;
+
+ count = avctx->extradata_size*8 - get_bits_count(&gb);
+ if (count>0)
+ {
+ av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",
+ count, get_bits(&gb, count));
+ }
+ else if (count < 0)
+ {
+ av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);
+ }
+ }
+ avctx->has_b_frames= !!(avctx->max_b_frames);
+
+ s->mb_width = (avctx->coded_width+15)>>4;
+ s->mb_height = (avctx->coded_height+15)>>4;
+
+ /* Allocate mb bitplanes */
+ if (alloc_bitplane(&v->mv_type_mb_plane, s->mb_width, s->mb_height) < 0)
+ return -1;
+ if (alloc_bitplane(&v->mv_type_mb_plane, s->mb_width, s->mb_height) < 0)
+ return -1;
+ if (alloc_bitplane(&v->skip_mb_plane, s->mb_width, s->mb_height) < 0)
+ return -1;
+ if (alloc_bitplane(&v->direct_mb_plane, s->mb_width, s->mb_height) < 0)
+ return -1;
+
+ /* For predictors */
+ v->previous_line_cbpcy = (uint8_t *)av_malloc(s->mb_stride*4);
+ if (!v->previous_line_cbpcy) return -1;
+
+#if HAS_ADVANCED_PROFILE
+ if (v->profile == PROFILE_ADVANCED)
+ {
+ if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)
+ return -1;
+ if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)
+ return -1;
+ }
+#endif
+
+ return 0;
+ }
+
+/** Decode a VC1/WMV3 frame
+ * @todo TODO: Handle VC-1 IDUs (Transport level?)
+ * @warning Initial try at using MpegEncContext stuff
+ */
+static int vc1_decode_frame(AVCodecContext *avctx,
+ void *data, int *data_size,
+ uint8_t *buf, int buf_size)
+{
+ VC1Context *v = avctx->priv_data;
+ MpegEncContext *s = &v->s;
+ int ret = FRAME_SKIPPED, len;
+ AVFrame *pict = data;
+ uint8_t *tmp_buf;
+ v->s.avctx = avctx;
+
+ //buf_size = 0 -> last frame
+ if (!buf_size) return 0;
+
+ len = avpicture_get_size(avctx->pix_fmt, avctx->width,
+ avctx->height);
+ tmp_buf = (uint8_t *)av_mallocz(len);
+ avpicture_fill((AVPicture *)pict, tmp_buf, avctx->pix_fmt,
+ avctx->width, avctx->height);
+
+ if (avctx->codec_id == CODEC_ID_VC1)
+ {
+#if 0
+ // search for IDU's
+ // FIXME
+ uint32_t scp = 0;
+ int scs = 0, i = 0;
+
+ while (i < buf_size)
+ {
+ for (; i < buf_size && scp != 0x000001; i++)
+ scp = ((scp<<8)|buf[i])&0xffffff;
+
+ if (scp != 0x000001)
+ break; // eof ?
+
+ scs = buf[i++];
+
+ init_get_bits(gb, buf+i, (buf_size-i)*8);
+
+ switch(scs)
+ {
+ case 0x0A: //Sequence End Code
+ return 0;
+ case 0x0B: //Slice Start Code
+ av_log(avctx, AV_LOG_ERROR, "Slice coding not supported\n");
+ return -1;
+ case 0x0C: //Field start code
+ av_log(avctx, AV_LOG_ERROR, "Interlaced coding not supported\n");
+ return -1;
+ case 0x0D: //Frame start code
+ break;
+ case 0x0E: //Entry point Start Code
+ if (v->profile < PROFILE_ADVANCED)
+ av_log(avctx, AV_LOG_ERROR,
+ "Found an entry point in profile %i\n", v->profile);
+ advanced_entry_point_process(avctx, gb);
+ break;
+ case 0x0F: //Sequence header Start Code
+ decode_sequence_header(avctx, gb);
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR,
+ "Unsupported IDU suffix %lX\n", scs);
+ }
+
+ i += get_bits_count(gb)*8;
+ }
+#else
+ av_abort();
+#endif
+ }
+ else
+ init_get_bits(&v->s.gb, buf, buf_size*8);
+
+ s->flags= avctx->flags;
+ s->flags2= avctx->flags2;
+
+ /* no supplementary picture */
+ if (buf_size == 0) {
+ /* special case for last picture */
+ if (s->low_delay==0 && s->next_picture_ptr) {
+ *pict= *(AVFrame*)s->next_picture_ptr;
+ s->next_picture_ptr= NULL;
+
+ *data_size = sizeof(AVFrame);
+ }
+
+ return 0;
+ }
+
+ //No IDU - we mimic ff_h263_decode_frame
+ s->bitstream_buffer_size=0;
+
+ if (!s->context_initialized) {
+ if (MPV_common_init(s) < 0) //we need the idct permutaton for reading a custom matrix
+ return -1;
+ }
+
+ //we need to set current_picture_ptr before reading the header, otherwise we cant store anyting im there
+ if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){
+ s->current_picture_ptr= &s->picture[ff_find_unused_picture(s, 0)];
+ }
+#if HAS_ADVANCED_PROFILE
+ if (v->profile == PROFILE_ADVANCED)
+ ret= advanced_decode_picture_primary_header(v);
+ else
+#endif
+ ret= standard_decode_picture_primary_header(v);
+ if (ret == FRAME_SKIPPED) return buf_size;
+ /* skip if the header was thrashed */
+ if (ret < 0){
+ av_log(s->avctx, AV_LOG_ERROR, "header damaged\n");
+ return -1;
+ }
+
+ //No bug workaround yet, no DCT conformance
+
+ //WMV9 does have resized images
+ if (v->profile < PROFILE_ADVANCED && v->multires){
+ //Parse context stuff in here, don't know how appliable it is
+ }
+ //Not sure about context initialization
+
+ // for hurry_up==5
+ s->current_picture.pict_type= s->pict_type;
+ s->current_picture.key_frame= s->pict_type == I_TYPE;
+
+ /* skip b frames if we dont have reference frames */
+ if(s->last_picture_ptr==NULL && (s->pict_type==B_TYPE || s->dropable))
+ return buf_size; //FIXME simulating all buffer consumed
+ /* skip b frames if we are in a hurry */
+ if(avctx->hurry_up && s->pict_type==B_TYPE)
+ return buf_size; //FIXME simulating all buffer consumed
+ /* skip everything if we are in a hurry>=5 */
+ if(avctx->hurry_up>=5)
+ return buf_size; //FIXME simulating all buffer consumed
+
+ if(s->next_p_frame_damaged){
+ if(s->pict_type==B_TYPE)
+ return buf_size; //FIXME simulating all buffer consumed
+ else
+ s->next_p_frame_damaged=0;
+ }
+
+ if(MPV_frame_start(s, avctx) < 0)
+ return -1;
+
+ ff_er_frame_start(s);
+
+ //wmv9 may or may not have skip bits
+#if HAS_ADVANCED_PROFILE
+ if (v->profile == PROFILE_ADVANCED)
+ ret= advanced_decode_picture_secondary_header(v);
+ else
+#endif
+ ret = standard_decode_picture_secondary_header(v);
+ if (ret<0) return FRAME_SKIPPED; //FIXME Non fatal for now
+
+ //We consider the image coded in only one slice
+#if HAS_ADVANCED_PROFILE
+ if (v->profile == PROFILE_ADVANCED)
+ {
+ switch(s->pict_type)
+ {
+ case I_TYPE: ret = advanced_decode_i_mbs(v); break;
+ case P_TYPE: ret = decode_p_mbs(v); break;
+ case B_TYPE:
+ case BI_TYPE: ret = decode_b_mbs(v); break;
+ default: ret = FRAME_SKIPPED;
+ }
+ if (ret == FRAME_SKIPPED) return buf_size; //We ignore for now failures
+ }
+ else
+#endif
+ {
+ ret = standard_decode_mbs(v);
+ if (ret == FRAME_SKIPPED) return buf_size;
+ }
+
+ ff_er_frame_end(s);
+
+ MPV_frame_end(s);
+
+ assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);
+ assert(s->current_picture.pict_type == s->pict_type);
+
+ if (s->pict_type == B_TYPE || s->low_delay) {
+ *pict= *(AVFrame*)s->current_picture_ptr;
+ } else if (s->last_picture_ptr != NULL) {
+ *pict= *(AVFrame*)s->last_picture_ptr;
+ }
+
+ if(s->last_picture_ptr || s->low_delay){
+ *data_size = sizeof(AVFrame);
+ ff_print_debug_info(s, pict);
+ }
+
+ /* Return the Picture timestamp as the frame number */
+ /* we substract 1 because it is added on utils.c */
+ avctx->frame_number = s->picture_number - 1;
+
+ av_log(avctx, AV_LOG_DEBUG, "Consumed %i/%i bits\n",
+ get_bits_count(&s->gb), buf_size*8);
+
+ /* Fake consumption of all data */
+ *data_size = len;
+ return buf_size; //Number of bytes consumed
+}
+
+/** Close a VC1/WMV3 decoder
+ * @warning Initial try at using MpegEncContext stuff
+ */
+static int vc1_decode_end(AVCodecContext *avctx)
+{
+ VC1Context *v = avctx->priv_data;
+
+#if HAS_ADVANCED_PROFILE
+ av_freep(&v->hrd_rate);
+ av_freep(&v->hrd_buffer);
+#endif
+ MPV_common_end(&v->s);
+ free_bitplane(&v->mv_type_mb_plane);
+ free_bitplane(&v->skip_mb_plane);
+ free_bitplane(&v->direct_mb_plane);
+ return 0;
+}
+
+AVCodec vc1_decoder = {
+ "vc1",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_VC1,
+ sizeof(VC1Context),
+ vc1_decode_init,
+ NULL,
+ vc1_decode_end,
+ vc1_decode_frame,
+ CODEC_CAP_DELAY,
+ NULL
+};
+
+AVCodec wmv3_decoder = {
+ "wmv3",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_WMV3,
+ sizeof(VC1Context),
+ vc1_decode_init,
+ NULL,
+ vc1_decode_end,
+ vc1_decode_frame,
+ CODEC_CAP_DELAY,
+ NULL
+};
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-10 08:26:16 +0000