/* * ASUS V1 codec * Copyright (c) 2003 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /** * @file asv1.c * ASUS V1 codec. */ #include "avcodec.h" #include "dsputil.h" #include "mpegvideo.h" //#undef NDEBUG //#include <assert.h> #define VLC_BITS 5 typedef struct ASV1Context{ AVCodecContext *avctx; DSPContext dsp; AVFrame picture; PutBitContext pb; GetBitContext gb; ScanTable scantable; int inv_qscale; int mb_width; int mb_height; int mb_width2; int mb_height2; DCTELEM __align8 block[6][64]; uint16_t __align8 intra_matrix[64]; int __align8 q_intra_matrix[64]; uint8_t *bitstream_buffer; int bitstream_buffer_size; } ASV1Context; static const uint8_t scantab[64]={ 0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19, 0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B, 0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29, 0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D, 0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39, }; static const uint8_t ccp_tab[17][2]={ {0x2,2}, {0xE,5}, {0xD,5}, {0xC,5}, {0xB,5}, {0xA,5}, {0x9,5}, {0x8,5}, {0x7,5}, {0x6,5}, {0x5,5}, {0x4,5}, {0x3,5}, {0x2,5}, {0x1,5}, {0x3,2}, {0xF,5}, //EOB }; static const uint8_t level_tab[7][2]={ {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4} }; static VLC ccp_vlc; static VLC level_vlc; static void init_vlcs(ASV1Context *a){ static int done = 0; if (!done) { done = 1; init_vlc(&ccp_vlc, VLC_BITS, 17, &ccp_tab[0][1], 2, 1, &ccp_tab[0][0], 2, 1); init_vlc(&level_vlc, VLC_BITS, 7, &level_tab[0][1], 2, 1, &level_tab[0][0], 2, 1); } } static inline int get_level(GetBitContext *gb){ int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1); if(code==3) return get_sbits(gb, 8); else return code - 3; } static inline void put_level(PutBitContext *pb, int level){ unsigned int index= level + 3; if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]); else{ put_bits(pb, level_tab[3][1], level_tab[3][0]); put_bits(pb, 8, level&0xFF); } } static inline int decode_block(ASV1Context *a, DCTELEM block[64]){ int i; block[0]= 8*get_bits(&a->gb, 8); for(i=0; i<11; i++){ const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1); if(ccp){ if(ccp == 16) break; if(ccp < 0 || i>=10){ printf("coded coeff pattern damaged\n"); return -1; } if(ccp&1) block[a->scantable.permutated[4*i+0]]= (get_level(&a->gb) * a->intra_matrix[4*i+0])>>4; if(ccp&2) block[a->scantable.permutated[4*i+1]]= (get_level(&a->gb) * a->intra_matrix[4*i+1])>>4; if(ccp&4) block[a->scantable.permutated[4*i+2]]= (get_level(&a->gb) * a->intra_matrix[4*i+2])>>4; if(ccp&8) block[a->scantable.permutated[4*i+3]]= (get_level(&a->gb) * a->intra_matrix[4*i+3])>>4; } } return 0; } static inline void encode_block(ASV1Context *a, DCTELEM block[64]){ int i; int nc_count=0; put_bits(&a->pb, 8, (block[0] + 32)>>6); block[0]= 0; for(i=0; i<10; i++){ const int index= scantab[4*i]; int ccp=0; if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 1; if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 2; if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 4; if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 8; if(ccp){ for(;nc_count; nc_count--) put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]); put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]); if(ccp&1) put_level(&a->pb, block[index + 0]); if(ccp&2) put_level(&a->pb, block[index + 8]); if(ccp&4) put_level(&a->pb, block[index + 1]); if(ccp&8) put_level(&a->pb, block[index + 9]); }else{ nc_count++; } } put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]); } static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){ int i; a->dsp.clear_blocks(block[0]); for(i=0; i<6; i++){ if( decode_block(a, block[i]) < 0) return -1; } return 0; } static inline void encode_mb(ASV1Context *a, DCTELEM block[6][64]){ int i; for(i=0; i<6; i++){ encode_block(a, block[i]); } } static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){ DCTELEM (*block)[64]= a->block; int linesize= a->picture.linesize[0]; uint8_t *dest_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16; uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8; uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8; a->dsp.idct_put(dest_y , linesize, block[0]); a->dsp.idct_put(dest_y + 8, linesize, block[1]); a->dsp.idct_put(dest_y + 8*linesize , linesize, block[2]); a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]); if(!(a->avctx->flags&CODEC_FLAG_GRAY)){ a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]); a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]); } } static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){ DCTELEM (*block)[64]= a->block; int linesize= a->picture.linesize[0]; int i; uint8_t *ptr_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16; uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8; uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8; a->dsp.get_pixels(block[0], ptr_y , linesize); a->dsp.get_pixels(block[1], ptr_y + 8, linesize); a->dsp.get_pixels(block[2], ptr_y + 8*linesize , linesize); a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize); for(i=0; i<4; i++) a->dsp.fdct(block[i]); if(!(a->avctx->flags&CODEC_FLAG_GRAY)){ a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]); a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]); for(i=4; i<6; i++) a->dsp.fdct(block[i]); } } static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size) { ASV1Context * const a = avctx->priv_data; AVFrame *picture = data; AVFrame * const p= (AVFrame*)&a->picture; int mb_x, mb_y; *data_size = 0; /* special case for last picture */ if (buf_size == 0) { return 0; } if(p->data[0]) avctx->release_buffer(avctx, p); p->reference= 0; if(avctx->get_buffer(avctx, p) < 0){ fprintf(stderr, "get_buffer() failed\n"); return -1; } p->pict_type= I_TYPE; p->key_frame= 1; a->bitstream_buffer= av_fast_realloc(a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE); a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (uint32_t*)buf, buf_size/4); init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8); for(mb_y=0; mb_y<a->mb_height2; mb_y++){ for(mb_x=0; mb_x<a->mb_width2; mb_x++){ if( decode_mb(a, a->block) <0) return -1; idct_put(a, mb_x, mb_y); } } if(a->mb_width2 != a->mb_width){ mb_x= a->mb_width2; for(mb_y=0; mb_y<a->mb_height2; mb_y++){ if( decode_mb(a, a->block) <0) return -1; idct_put(a, mb_x, mb_y); } } if(a->mb_height2 != a->mb_height){ mb_y= a->mb_height2; for(mb_x=0; mb_x<a->mb_width; mb_x++){ if( decode_mb(a, a->block) <0) return -1; idct_put(a, mb_x, mb_y); } } #if 0 int i; printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb)); for(i=get_bits_count(&a->gb); i<8*buf_size; i++){ printf("%d", get_bits1(&a->gb)); } for(i=0; i<s->avctx->extradata_size; i++){ printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]); } #endif p->quality= (32 + a->inv_qscale/2)/a->inv_qscale; memset(p->qscale_table, p->quality, p->qstride*a->mb_height); *picture= *(AVFrame*)&a->picture; *data_size = sizeof(AVPicture); emms_c(); return (get_bits_count(&a->gb)+31)/32*4; } static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){ ASV1Context * const a = avctx->priv_data; AVFrame *pict = data; AVFrame * const p= (AVFrame*)&a->picture; int size; int mb_x, mb_y; init_put_bits(&a->pb, buf, buf_size, NULL, NULL); *p = *pict; p->pict_type= I_TYPE; p->key_frame= 1; for(mb_y=0; mb_y<a->mb_height2; mb_y++){ for(mb_x=0; mb_x<a->mb_width2; mb_x++){ dct_get(a, mb_x, mb_y); encode_mb(a, a->block); } } if(a->mb_width2 != a->mb_width){ mb_x= a->mb_width2; for(mb_y=0; mb_y<a->mb_height2; mb_y++){ dct_get(a, mb_x, mb_y); encode_mb(a, a->block); } } if(a->mb_height2 != a->mb_height){ mb_y= a->mb_height2; for(mb_x=0; mb_x<a->mb_width; mb_x++){ dct_get(a, mb_x, mb_y); encode_mb(a, a->block); } } emms_c(); align_put_bits(&a->pb); while(get_bit_count(&a->pb)&31) put_bits(&a->pb, 8, 0); size= get_bit_count(&a->pb)/32; a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size); return size*4; } static void common_init(AVCodecContext *avctx){ ASV1Context * const a = avctx->priv_data; dsputil_init(&a->dsp, avctx); a->mb_width = (avctx->width + 15) / 16; a->mb_height = (avctx->height + 15) / 16; a->mb_width2 = (avctx->width + 0) / 16; a->mb_height2 = (avctx->height + 0) / 16; avctx->coded_frame= (AVFrame*)&a->picture; a->avctx= avctx; } static int decode_init(AVCodecContext *avctx){ ASV1Context * const a = avctx->priv_data; AVFrame *p= (AVFrame*)&a->picture; int i; common_init(avctx); init_vlcs(a); ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab); a->inv_qscale= le2me_32(((uint32_t*)avctx->extradata)[0]); if(a->inv_qscale == 0){ printf("illegal qscale 0\n"); a->inv_qscale= 6; } for(i=0; i<64; i++){ int index= scantab[i]; a->intra_matrix[i]= 64*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale; } p->qstride= a->mb_width; p->qscale_table= av_mallocz( p->qstride * a->mb_height); return 0; } static int encode_init(AVCodecContext *avctx){ ASV1Context * const a = avctx->priv_data; int i; common_init(avctx); if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE; a->inv_qscale= (32*FF_QUALITY_SCALE + avctx->global_quality/2) / avctx->global_quality; avctx->extradata= av_mallocz(8); avctx->extradata_size=8; ((uint32_t*)avctx->extradata)[0]= le2me_32(a->inv_qscale); ((uint32_t*)avctx->extradata)[1]= le2me_32(ff_get_fourcc("ASUS")); for(i=0; i<64; i++){ int q= 32*ff_mpeg1_default_intra_matrix[i]; a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q; } return 0; } static int decode_end(AVCodecContext *avctx){ ASV1Context * const a = avctx->priv_data; av_freep(&a->bitstream_buffer); av_freep(&a->picture.qscale_table); a->bitstream_buffer_size=0; avcodec_default_free_buffers(avctx); return 0; } AVCodec asv1_decoder = { "asv1", CODEC_TYPE_VIDEO, CODEC_ID_ASV1, sizeof(ASV1Context), decode_init, NULL, decode_end, decode_frame, CODEC_CAP_DR1, }; #ifdef CONFIG_ENCODERS AVCodec asv1_encoder = { "asv1", CODEC_TYPE_VIDEO, CODEC_ID_ASV1, sizeof(ASV1Context), encode_init, encode_frame, //encode_end, }; #endif //CONFIG_ENCODERS