X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fmpeg12.c;h=8bc56973ed9bc70ccc30e42c4f8607d418afac48;hb=6fee1b90ce3bf4fbdfde7016e0890057c9000487;hp=74b8eea869db1b7e2a2b5c4d600373479c36027f;hpb=aeaef4ed63fcf03cf9b39fd8950829e72fdf07fb;p=ffmpeg diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c index 74b8eea869d..8bc56973ed9 100644 --- a/libavcodec/mpeg12.c +++ b/libavcodec/mpeg12.c @@ -1,132 +1,104 @@ /* * MPEG-1/2 decoder - * Copyright (c) 2000,2001 Fabrice Bellard + * Copyright (c) 2000, 2001 Fabrice Bellard * Copyright (c) 2002-2004 Michael Niedermayer * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav 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 2.1 of the License, or (at your option) any later version. * - * FFmpeg is distributed in the hope that it will be useful, + * Libav 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 FFmpeg; if not, write to the Free Software + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** - * @file libavcodec/mpeg12.c + * @file * MPEG-1/2 decoder */ //#define DEBUG +#include "libavutil/attributes.h" #include "internal.h" #include "avcodec.h" #include "dsputil.h" #include "mpegvideo.h" - +#include "error_resilience.h" #include "mpeg12.h" #include "mpeg12data.h" #include "mpeg12decdata.h" #include "bytestream.h" #include "vdpau_internal.h" #include "xvmc_internal.h" +#include "thread.h" //#undef NDEBUG //#include - -#define MV_VLC_BITS 9 -#define MBINCR_VLC_BITS 9 -#define MB_PAT_VLC_BITS 9 -#define MB_PTYPE_VLC_BITS 6 -#define MB_BTYPE_VLC_BITS 6 - -static inline int mpeg1_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n); -static inline int mpeg1_decode_block_inter(MpegEncContext *s, - DCTELEM *block, - int n); -static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n); -static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, - DCTELEM *block, - int n); -static inline int mpeg2_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n); -static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n); -static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n); -static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred); -static void exchange_uv(MpegEncContext *s); - -static const enum PixelFormat pixfmt_xvmc_mpg2_420[] = { - PIX_FMT_XVMC_MPEG2_IDCT, - PIX_FMT_XVMC_MPEG2_MC, - PIX_FMT_NONE}; - uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; - #define INIT_2D_VLC_RL(rl, static_size)\ {\ static RL_VLC_ELEM rl_vlc_table[static_size];\ INIT_VLC_STATIC(&rl.vlc, TEX_VLC_BITS, rl.n + 2,\ - &rl.table_vlc[0][1], 4, 2,\ - &rl.table_vlc[0][0], 4, 2, static_size);\ + &rl.table_vlc[0][1], 4, 2,\ + &rl.table_vlc[0][0], 4, 2, static_size);\ \ - rl.rl_vlc[0]= rl_vlc_table;\ + rl.rl_vlc[0] = rl_vlc_table;\ init_2d_vlc_rl(&rl);\ } -static void init_2d_vlc_rl(RLTable *rl) +static av_cold void init_2d_vlc_rl(RLTable *rl) { int i; - for(i=0; ivlc.table_size; i++){ - int code= rl->vlc.table[i][0]; - int len = rl->vlc.table[i][1]; + for (i = 0; i < rl->vlc.table_size; i++) { + int code = rl->vlc.table[i][0]; + int len = rl->vlc.table[i][1]; int level, run; - if(len==0){ // illegal code - run= 65; - level= MAX_LEVEL; - }else if(len<0){ //more bits needed - run= 0; - level= code; - }else{ - if(code==rl->n){ //esc - run= 65; - level= 0; - }else if(code==rl->n+1){ //eob - run= 0; - level= 127; - }else{ - run= rl->table_run [code] + 1; - level= rl->table_level[code]; + if (len == 0) { // illegal code + run = 65; + level = MAX_LEVEL; + } else if (len<0) { //more bits needed + run = 0; + level = code; + } else { + if (code == rl->n) { //esc + run = 65; + level = 0; + } else if (code == rl->n+1) { //eob + run = 0; + level = 127; + } else { + run = rl->table_run [code] + 1; + level = rl->table_level[code]; } } - rl->rl_vlc[0][i].len= len; - rl->rl_vlc[0][i].level= level; - rl->rl_vlc[0][i].run= run; + rl->rl_vlc[0][i].len = len; + rl->rl_vlc[0][i].level = level; + rl->rl_vlc[0][i].run = run; } } -void ff_mpeg12_common_init(MpegEncContext *s) +av_cold void ff_mpeg12_common_init(MpegEncContext *s) { - s->y_dc_scale_table= - s->c_dc_scale_table= mpeg2_dc_scale_table[s->intra_dc_precision]; + s->y_dc_scale_table = + s->c_dc_scale_table = ff_mpeg2_dc_scale_table[s->intra_dc_precision]; } -void ff_mpeg1_clean_buffers(MpegEncContext *s){ +void ff_mpeg1_clean_buffers(MpegEncContext *s) +{ s->last_dc[0] = 1 << (7 + s->intra_dc_precision); s->last_dc[1] = s->last_dc[0]; s->last_dc[2] = s->last_dc[0]; @@ -137,11 +109,15 @@ void ff_mpeg1_clean_buffers(MpegEncContext *s){ /******************************************/ /* decoding */ -static VLC mv_vlc; -static VLC mbincr_vlc; -static VLC mb_ptype_vlc; -static VLC mb_btype_vlc; -static VLC mb_pat_vlc; +VLC ff_mv_vlc; + +VLC ff_dc_lum_vlc; +VLC ff_dc_chroma_vlc; + +VLC ff_mbincr_vlc; +VLC ff_mb_ptype_vlc; +VLC ff_mb_btype_vlc; +VLC ff_mb_pat_vlc; av_cold void ff_mpeg12_init_vlcs(void) { @@ -150,2451 +126,96 @@ av_cold void ff_mpeg12_init_vlcs(void) if (!done) { done = 1; - INIT_VLC_STATIC(&dc_lum_vlc, DC_VLC_BITS, 12, - ff_mpeg12_vlc_dc_lum_bits, 1, 1, - ff_mpeg12_vlc_dc_lum_code, 2, 2, 512); - INIT_VLC_STATIC(&dc_chroma_vlc, DC_VLC_BITS, 12, - ff_mpeg12_vlc_dc_chroma_bits, 1, 1, - ff_mpeg12_vlc_dc_chroma_code, 2, 2, 514); - INIT_VLC_STATIC(&mv_vlc, MV_VLC_BITS, 17, - &ff_mpeg12_mbMotionVectorTable[0][1], 2, 1, - &ff_mpeg12_mbMotionVectorTable[0][0], 2, 1, 518); - INIT_VLC_STATIC(&mbincr_vlc, MBINCR_VLC_BITS, 36, - &ff_mpeg12_mbAddrIncrTable[0][1], 2, 1, - &ff_mpeg12_mbAddrIncrTable[0][0], 2, 1, 538); - INIT_VLC_STATIC(&mb_pat_vlc, MB_PAT_VLC_BITS, 64, - &ff_mpeg12_mbPatTable[0][1], 2, 1, - &ff_mpeg12_mbPatTable[0][0], 2, 1, 512); - - INIT_VLC_STATIC(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7, - &table_mb_ptype[0][1], 2, 1, - &table_mb_ptype[0][0], 2, 1, 64); - INIT_VLC_STATIC(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11, - &table_mb_btype[0][1], 2, 1, - &table_mb_btype[0][0], 2, 1, 64); - init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]); - init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]); + INIT_VLC_STATIC(&ff_dc_lum_vlc, DC_VLC_BITS, 12, + ff_mpeg12_vlc_dc_lum_bits, 1, 1, + ff_mpeg12_vlc_dc_lum_code, 2, 2, 512); + INIT_VLC_STATIC(&ff_dc_chroma_vlc, DC_VLC_BITS, 12, + ff_mpeg12_vlc_dc_chroma_bits, 1, 1, + ff_mpeg12_vlc_dc_chroma_code, 2, 2, 514); + INIT_VLC_STATIC(&ff_mv_vlc, MV_VLC_BITS, 17, + &ff_mpeg12_mbMotionVectorTable[0][1], 2, 1, + &ff_mpeg12_mbMotionVectorTable[0][0], 2, 1, 518); + INIT_VLC_STATIC(&ff_mbincr_vlc, MBINCR_VLC_BITS, 36, + &ff_mpeg12_mbAddrIncrTable[0][1], 2, 1, + &ff_mpeg12_mbAddrIncrTable[0][0], 2, 1, 538); + INIT_VLC_STATIC(&ff_mb_pat_vlc, MB_PAT_VLC_BITS, 64, + &ff_mpeg12_mbPatTable[0][1], 2, 1, + &ff_mpeg12_mbPatTable[0][0], 2, 1, 512); + + INIT_VLC_STATIC(&ff_mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7, + &table_mb_ptype[0][1], 2, 1, + &table_mb_ptype[0][0], 2, 1, 64); + INIT_VLC_STATIC(&ff_mb_btype_vlc, MB_BTYPE_VLC_BITS, 11, + &table_mb_btype[0][1], 2, 1, + &table_mb_btype[0][0], 2, 1, 64); + ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]); + ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]); INIT_2D_VLC_RL(ff_rl_mpeg1, 680); INIT_2D_VLC_RL(ff_rl_mpeg2, 674); } } -static inline int get_dmv(MpegEncContext *s) -{ - if(get_bits1(&s->gb)) - return 1 - (get_bits1(&s->gb) << 1); - else - return 0; -} - -static inline int get_qscale(MpegEncContext *s) -{ - int qscale = get_bits(&s->gb, 5); - if (s->q_scale_type) { - return non_linear_qscale[qscale]; - } else { - return qscale << 1; - } -} - -/* motion type (for MPEG-2) */ -#define MT_FIELD 1 -#define MT_FRAME 2 -#define MT_16X8 2 -#define MT_DMV 3 - -static int mpeg_decode_mb(MpegEncContext *s, - DCTELEM block[12][64]) +/** + * Find the end of the current frame in the bitstream. + * @return the position of the first byte of the next frame, or -1 + */ +int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s) { - int i, j, k, cbp, val, mb_type, motion_type; - const int mb_block_count = 4 + (1<< s->chroma_format); - - dprintf(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y); - - assert(s->mb_skipped==0); - - if (s->mb_skip_run-- != 0) { - if (s->pict_type == FF_P_TYPE) { - s->mb_skipped = 1; - s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; - } else { - int mb_type; - - if(s->mb_x) - mb_type= s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]; - else - mb_type= s->current_picture.mb_type[ s->mb_width + (s->mb_y-1)*s->mb_stride - 1]; // FIXME not sure if this is allowed in MPEG at all - if(IS_INTRA(mb_type)) - return -1; - - s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= - mb_type | MB_TYPE_SKIP; -// assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8)); - - if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0) - s->mb_skipped = 1; - } + int i; + uint32_t state = pc->state; + /* EOF considered as end of frame */ + if (buf_size == 0) return 0; - } - - switch(s->pict_type) { - default: - case FF_I_TYPE: - if (get_bits1(&s->gb) == 0) { - if (get_bits1(&s->gb) == 0){ - av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA; - } else { - mb_type = MB_TYPE_INTRA; - } - break; - case FF_P_TYPE: - mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1); - if (mb_type < 0){ - av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - mb_type = ptype2mb_type[ mb_type ]; - break; - case FF_B_TYPE: - mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1); - if (mb_type < 0){ - av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - mb_type = btype2mb_type[ mb_type ]; - break; - } - dprintf(s->avctx, "mb_type=%x\n", mb_type); -// motion_type = 0; /* avoid warning */ - if (IS_INTRA(mb_type)) { - s->dsp.clear_blocks(s->block[0]); - - if(!s->chroma_y_shift){ - s->dsp.clear_blocks(s->block[6]); - } - - /* compute DCT type */ - if (s->picture_structure == PICT_FRAME && //FIXME add an interlaced_dct coded var? - !s->frame_pred_frame_dct) { - s->interlaced_dct = get_bits1(&s->gb); - } - if (IS_QUANT(mb_type)) - s->qscale = get_qscale(s); - - if (s->concealment_motion_vectors) { - /* just parse them */ - if (s->picture_structure != PICT_FRAME) - skip_bits1(&s->gb); /* field select */ - - s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] = - mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]); - s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] = - mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]); - - skip_bits1(&s->gb); /* marker */ - }else - memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */ - s->mb_intra = 1; - //if 1, we memcpy blocks in xvmcvideo - if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1){ - ff_xvmc_pack_pblocks(s,-1);//inter are always full blocks - if(s->swap_uv){ - exchange_uv(s); - } - } +/* + 0 frame start -> 1/4 + 1 first_SEQEXT -> 0/2 + 2 first field start -> 3/0 + 3 second_SEQEXT -> 2/0 + 4 searching end +*/ - if (s->codec_id == CODEC_ID_MPEG2VIDEO) { - if(s->flags2 & CODEC_FLAG2_FAST){ - for(i=0;i<6;i++) { - mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i); - } - }else{ - for(i=0;ipblocks[i], i) < 0) - return -1; - } + for (i = 0; i < buf_size; i++) { + assert(pc->frame_start_found >= 0 && pc->frame_start_found <= 4); + if (pc->frame_start_found & 1) { + if (state == EXT_START_CODE && (buf[i] & 0xF0) != 0x80) + pc->frame_start_found--; + else if (state == EXT_START_CODE + 2) { + if ((buf[i] & 3) == 3) + pc->frame_start_found = 0; + else + pc->frame_start_found = (pc->frame_start_found + 1) & 3; } + state++; } else { - for(i=0;i<6;i++) { - if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0) - return -1; - } - } - } else { - if (mb_type & MB_TYPE_ZERO_MV){ - assert(mb_type & MB_TYPE_CBP); - - s->mv_dir = MV_DIR_FORWARD; - if(s->picture_structure == PICT_FRAME){ - if(!s->frame_pred_frame_dct) - s->interlaced_dct = get_bits1(&s->gb); - s->mv_type = MV_TYPE_16X16; - }else{ - s->mv_type = MV_TYPE_FIELD; - mb_type |= MB_TYPE_INTERLACED; - s->field_select[0][0]= s->picture_structure - 1; - } - - if (IS_QUANT(mb_type)) - s->qscale = get_qscale(s); - - s->last_mv[0][0][0] = 0; - s->last_mv[0][0][1] = 0; - s->last_mv[0][1][0] = 0; - s->last_mv[0][1][1] = 0; - s->mv[0][0][0] = 0; - s->mv[0][0][1] = 0; - }else{ - assert(mb_type & MB_TYPE_L0L1); -//FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED - /* get additional motion vector type */ - if (s->frame_pred_frame_dct) - motion_type = MT_FRAME; - else{ - motion_type = get_bits(&s->gb, 2); - if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type)) - s->interlaced_dct = get_bits1(&s->gb); - } - - if (IS_QUANT(mb_type)) - s->qscale = get_qscale(s); - - /* motion vectors */ - s->mv_dir= (mb_type>>13)&3; - dprintf(s->avctx, "motion_type=%d\n", motion_type); - switch(motion_type) { - case MT_FRAME: /* or MT_16X8 */ - if (s->picture_structure == PICT_FRAME) { - mb_type |= MB_TYPE_16x16; - s->mv_type = MV_TYPE_16X16; - for(i=0;i<2;i++) { - if (USES_LIST(mb_type, i)) { - /* MT_FRAME */ - s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] = - mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]); - s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] = - mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]); - /* full_pel: only for MPEG-1 */ - if (s->full_pel[i]){ - s->mv[i][0][0] <<= 1; - s->mv[i][0][1] <<= 1; - } - } - } - } else { - mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; - s->mv_type = MV_TYPE_16X8; - for(i=0;i<2;i++) { - if (USES_LIST(mb_type, i)) { - /* MT_16X8 */ - for(j=0;j<2;j++) { - s->field_select[i][j] = get_bits1(&s->gb); - for(k=0;k<2;k++) { - val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], - s->last_mv[i][j][k]); - s->last_mv[i][j][k] = val; - s->mv[i][j][k] = val; - } - } - } - } - } - break; - case MT_FIELD: - s->mv_type = MV_TYPE_FIELD; - if (s->picture_structure == PICT_FRAME) { - mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; - for(i=0;i<2;i++) { - if (USES_LIST(mb_type, i)) { - for(j=0;j<2;j++) { - s->field_select[i][j] = get_bits1(&s->gb); - val = mpeg_decode_motion(s, s->mpeg_f_code[i][0], - s->last_mv[i][j][0]); - s->last_mv[i][j][0] = val; - s->mv[i][j][0] = val; - dprintf(s->avctx, "fmx=%d\n", val); - val = mpeg_decode_motion(s, s->mpeg_f_code[i][1], - s->last_mv[i][j][1] >> 1); - s->last_mv[i][j][1] = val << 1; - s->mv[i][j][1] = val; - dprintf(s->avctx, "fmy=%d\n", val); - } - } - } - } else { - mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED; - for(i=0;i<2;i++) { - if (USES_LIST(mb_type, i)) { - s->field_select[i][0] = get_bits1(&s->gb); - for(k=0;k<2;k++) { - val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], - s->last_mv[i][0][k]); - s->last_mv[i][0][k] = val; - s->last_mv[i][1][k] = val; - s->mv[i][0][k] = val; - } - } - } - } - break; - case MT_DMV: - s->mv_type = MV_TYPE_DMV; - for(i=0;i<2;i++) { - if (USES_LIST(mb_type, i)) { - int dmx, dmy, mx, my, m; - mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0], - s->last_mv[i][0][0]); - s->last_mv[i][0][0] = mx; - s->last_mv[i][1][0] = mx; - dmx = get_dmv(s); - my = mpeg_decode_motion(s, s->mpeg_f_code[i][1], - s->last_mv[i][0][1] >> 1); - dmy = get_dmv(s); - - - s->last_mv[i][0][1] = my<<1; - s->last_mv[i][1][1] = my<<1; - - s->mv[i][0][0] = mx; - s->mv[i][0][1] = my; - s->mv[i][1][0] = mx;//not used - s->mv[i][1][1] = my;//not used - - if (s->picture_structure == PICT_FRAME) { - mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED; - - //m = 1 + 2 * s->top_field_first; - m = s->top_field_first ? 1 : 3; - - /* top -> top pred */ - s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx; - s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1; - m = 4 - m; - s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx; - s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1; - } else { - mb_type |= MB_TYPE_16x16; - - s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx; - s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy; - if(s->picture_structure == PICT_TOP_FIELD) - s->mv[i][2][1]--; - else - s->mv[i][2][1]++; - } - } - } - break; - default: - av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - } - - s->mb_intra = 0; - if (HAS_CBP(mb_type)) { - s->dsp.clear_blocks(s->block[0]); - - cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1); - if(mb_block_count > 6){ - cbp<<= mb_block_count-6; - cbp |= get_bits(&s->gb, mb_block_count-6); - s->dsp.clear_blocks(s->block[6]); - } - if (cbp <= 0){ - av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - //if 1, we memcpy blocks in xvmcvideo - if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1){ - ff_xvmc_pack_pblocks(s,cbp); - if(s->swap_uv){ - exchange_uv(s); - } - } - - if (s->codec_id == CODEC_ID_MPEG2VIDEO) { - if(s->flags2 & CODEC_FLAG2_FAST){ - for(i=0;i<6;i++) { - if(cbp & 32) { - mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i); - } else { - s->block_last_index[i] = -1; - } - cbp+=cbp; - } - }else{ - cbp<<= 12-mb_block_count; - - for(i=0;ipblocks[i], i) < 0) - return -1; - } else { - s->block_last_index[i] = -1; - } - cbp+=cbp; - } - } - } else { - if(s->flags2 & CODEC_FLAG2_FAST){ - for(i=0;i<6;i++) { - if (cbp & 32) { - mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i); - } else { - s->block_last_index[i] = -1; - } - cbp+=cbp; - } - }else{ - for(i=0;i<6;i++) { - if (cbp & 32) { - if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0) - return -1; - } else { - s->block_last_index[i] = -1; - } - cbp+=cbp; - } - } - } - }else{ - for(i=0;i<12;i++) - s->block_last_index[i] = -1; - } - } - - s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type; - - return 0; -} - -/* as H.263, but only 17 codes */ -static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred) -{ - int code, sign, val, l, shift; - - code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2); - if (code == 0) { - return pred; - } - if (code < 0) { - return 0xffff; - } - - sign = get_bits1(&s->gb); - shift = fcode - 1; - val = code; - if (shift) { - val = (val - 1) << shift; - val |= get_bits(&s->gb, shift); - val++; - } - if (sign) - val = -val; - val += pred; - - /* modulo decoding */ - l= INT_BIT - 5 - shift; - val = (val<>l; - return val; -} - -static inline int mpeg1_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, dc, diff, i, j, run; - int component; - RLTable *rl = &ff_rl_mpeg1; - uint8_t * const scantable= s->intra_scantable.permutated; - const uint16_t *quant_matrix= s->intra_matrix; - const int qscale= s->qscale; - - /* DC coefficient */ - component = (n <= 3 ? 0 : n - 4 + 1); - diff = decode_dc(&s->gb, component); - if (diff >= 0xffff) - return -1; - dc = s->last_dc[component]; - dc += diff; - s->last_dc[component] = dc; - block[0] = dc*quant_matrix[0]; - dprintf(s->avctx, "dc=%d diff=%d\n", dc, diff); - i = 0; - { - OPEN_READER(re, &s->gb); - /* now quantify & encode AC coefficients */ - for(;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if(level == 127){ - break; - } else if(level != 0) { - i += run; - j = scantable[i]; - level= (level*qscale*quant_matrix[j])>>4; - level= (level-1)|1; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); - if (level == -128) { - level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8); - } else if (level == 0) { - level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8); - } - i += run; - j = scantable[i]; - if(level<0){ - level= -level; - level= (level*qscale*quant_matrix[j])>>4; - level= (level-1)|1; - level= -level; - }else{ - level= (level*qscale*quant_matrix[j])>>4; - level= (level-1)|1; - } - } - 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[j] = level; - } - CLOSE_READER(re, &s->gb); - } - s->block_last_index[n] = i; - return 0; -} - -int ff_mpeg1_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n) -{ - return mpeg1_decode_block_intra(s, block, n); -} - -static inline int mpeg1_decode_block_inter(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, i, j, run; - RLTable *rl = &ff_rl_mpeg1; - uint8_t * const scantable= s->intra_scantable.permutated; - const uint16_t *quant_matrix= s->inter_matrix; - const int qscale= s->qscale; - - { - OPEN_READER(re, &s->gb); - i = -1; - // special case for first coefficient, no need to add second VLC table - UPDATE_CACHE(re, &s->gb); - if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { - level= (3*qscale*quant_matrix[0])>>5; - level= (level-1)|1; - if(GET_CACHE(re, &s->gb)&0x40000000) - level= -level; - block[0] = level; - i++; - SKIP_BITS(re, &s->gb, 2); - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - goto end; - } -#if MIN_CACHE_BITS < 19 - UPDATE_CACHE(re, &s->gb); -#endif - /* now quantify & encode AC coefficients */ - for(;;) { - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if(level != 0) { - i += run; - j = scantable[i]; - level= ((level*2+1)*qscale*quant_matrix[j])>>5; - level= (level-1)|1; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); - if (level == -128) { - level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8); - } else if (level == 0) { - level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8); - } - i += run; - j = scantable[i]; - if(level<0){ - level= -level; - level= ((level*2+1)*qscale*quant_matrix[j])>>5; - level= (level-1)|1; - level= -level; - }else{ - level= ((level*2+1)*qscale*quant_matrix[j])>>5; - level= (level-1)|1; - } - } - 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[j] = level; -#if MIN_CACHE_BITS < 19 - UPDATE_CACHE(re, &s->gb); -#endif - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - break; -#if MIN_CACHE_BITS >= 19 - UPDATE_CACHE(re, &s->gb); -#endif - } -end: - LAST_SKIP_BITS(re, &s->gb, 2); - CLOSE_READER(re, &s->gb); - } - s->block_last_index[n] = i; - return 0; -} - -static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n) -{ - int level, i, j, run; - RLTable *rl = &ff_rl_mpeg1; - uint8_t * const scantable= s->intra_scantable.permutated; - const int qscale= s->qscale; - - { - OPEN_READER(re, &s->gb); - i = -1; - // special case for first coefficient, no need to add second VLC table - UPDATE_CACHE(re, &s->gb); - if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { - level= (3*qscale)>>1; - level= (level-1)|1; - if(GET_CACHE(re, &s->gb)&0x40000000) - level= -level; - block[0] = level; - i++; - SKIP_BITS(re, &s->gb, 2); - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - goto end; - } -#if MIN_CACHE_BITS < 19 - UPDATE_CACHE(re, &s->gb); -#endif - - /* now quantify & encode AC coefficients */ - for(;;) { - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if(level != 0) { - i += run; - j = scantable[i]; - level= ((level*2+1)*qscale)>>1; - level= (level-1)|1; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); - if (level == -128) { - level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8); - } else if (level == 0) { - level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8); - } - i += run; - j = scantable[i]; - if(level<0){ - level= -level; - level= ((level*2+1)*qscale)>>1; - level= (level-1)|1; - level= -level; - }else{ - level= ((level*2+1)*qscale)>>1; - level= (level-1)|1; - } - } - - block[j] = level; -#if MIN_CACHE_BITS < 19 - UPDATE_CACHE(re, &s->gb); -#endif - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - break; -#if MIN_CACHE_BITS >= 19 - UPDATE_CACHE(re, &s->gb); -#endif - } -end: - LAST_SKIP_BITS(re, &s->gb, 2); - CLOSE_READER(re, &s->gb); - } - s->block_last_index[n] = i; - return 0; -} - - -static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, i, j, run; - RLTable *rl = &ff_rl_mpeg1; - uint8_t * const scantable= s->intra_scantable.permutated; - const uint16_t *quant_matrix; - const int qscale= s->qscale; - int mismatch; - - mismatch = 1; - - { - OPEN_READER(re, &s->gb); - i = -1; - if (n < 4) - quant_matrix = s->inter_matrix; - else - quant_matrix = s->chroma_inter_matrix; - - // special case for first coefficient, no need to add second VLC table - UPDATE_CACHE(re, &s->gb); - if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { - level= (3*qscale*quant_matrix[0])>>5; - if(GET_CACHE(re, &s->gb)&0x40000000) - level= -level; - block[0] = level; - mismatch ^= level; - i++; - SKIP_BITS(re, &s->gb, 2); - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - goto end; - } -#if MIN_CACHE_BITS < 19 - UPDATE_CACHE(re, &s->gb); -#endif - - /* now quantify & encode AC coefficients */ - for(;;) { - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if(level != 0) { - i += run; - j = scantable[i]; - level= ((level*2+1)*qscale*quant_matrix[j])>>5; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); - - i += run; - j = scantable[i]; - if(level<0){ - level= ((-level*2+1)*qscale*quant_matrix[j])>>5; - level= -level; - }else{ - level= ((level*2+1)*qscale*quant_matrix[j])>>5; - } - } - 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; + i = avpriv_find_start_code(buf + i, buf + buf_size, &state) - buf - 1; + if (pc->frame_start_found == 0 && state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE) { + i++; + pc->frame_start_found = 4; } - - mismatch ^= level; - block[j] = level; -#if MIN_CACHE_BITS < 19 - UPDATE_CACHE(re, &s->gb); -#endif - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - break; -#if MIN_CACHE_BITS >= 19 - UPDATE_CACHE(re, &s->gb); -#endif - } -end: - LAST_SKIP_BITS(re, &s->gb, 2); - CLOSE_READER(re, &s->gb); - } - block[63] ^= (mismatch & 1); - - s->block_last_index[n] = i; - return 0; -} - -static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, i, j, run; - RLTable *rl = &ff_rl_mpeg1; - uint8_t * const scantable= s->intra_scantable.permutated; - const int qscale= s->qscale; - OPEN_READER(re, &s->gb); - i = -1; - - // special case for first coefficient, no need to add second VLC table - UPDATE_CACHE(re, &s->gb); - if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { - level= (3*qscale)>>1; - if(GET_CACHE(re, &s->gb)&0x40000000) - level= -level; - block[0] = level; - i++; - SKIP_BITS(re, &s->gb, 2); - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - goto end; - } -#if MIN_CACHE_BITS < 19 - UPDATE_CACHE(re, &s->gb); -#endif - - /* now quantify & encode AC coefficients */ - for(;;) { - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if(level != 0) { - i += run; - j = scantable[i]; - level= ((level*2+1)*qscale)>>1; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); - - i += run; - j = scantable[i]; - if(level<0){ - level= ((-level*2+1)*qscale)>>1; - level= -level; - }else{ - level= ((level*2+1)*qscale)>>1; + if (state == SEQ_END_CODE) { + pc->frame_start_found = 0; + pc->state=-1; + return i+1; } - } - - block[j] = level; -#if MIN_CACHE_BITS < 19 - UPDATE_CACHE(re, &s->gb); -#endif - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - break; -#if MIN_CACHE_BITS >=19 - UPDATE_CACHE(re, &s->gb); -#endif - } -end: - LAST_SKIP_BITS(re, &s->gb, 2); - CLOSE_READER(re, &s->gb); - s->block_last_index[n] = i; - return 0; -} - - -static inline int mpeg2_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, dc, diff, i, j, run; - int component; - RLTable *rl; - uint8_t * const scantable= s->intra_scantable.permutated; - const uint16_t *quant_matrix; - const int qscale= s->qscale; - int mismatch; - - /* DC coefficient */ - if (n < 4){ - quant_matrix = s->intra_matrix; - component = 0; - }else{ - quant_matrix = s->chroma_intra_matrix; - component = (n&1) + 1; - } - diff = decode_dc(&s->gb, component); - if (diff >= 0xffff) - return -1; - dc = s->last_dc[component]; - dc += diff; - s->last_dc[component] = dc; - block[0] = dc << (3 - s->intra_dc_precision); - dprintf(s->avctx, "dc=%d\n", block[0]); - mismatch = block[0] ^ 1; - i = 0; - if (s->intra_vlc_format) - rl = &ff_rl_mpeg2; - else - rl = &ff_rl_mpeg1; - - { - OPEN_READER(re, &s->gb); - /* now quantify & encode AC coefficients */ - for(;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if(level == 127){ - break; - } else if(level != 0) { - i += run; - j = scantable[i]; - level= (level*qscale*quant_matrix[j])>>4; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); - i += run; - j = scantable[i]; - if(level<0){ - level= (-level*qscale*quant_matrix[j])>>4; - level= -level; - }else{ - level= (level*qscale*quant_matrix[j])>>4; + if (pc->frame_start_found == 2 && state == SEQ_START_CODE) + pc->frame_start_found = 0; + if (pc->frame_start_found < 4 && state == EXT_START_CODE) + pc->frame_start_found++; + if (pc->frame_start_found == 4 && (state & 0xFFFFFF00) == 0x100) { + if (state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE) { + pc->frame_start_found = 0; + pc->state = -1; + return i - 3; } } - 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; - } - - mismatch^= level; - block[j] = level; - } - CLOSE_READER(re, &s->gb); - } - block[63]^= mismatch&1; - - s->block_last_index[n] = i; - return 0; -} - -static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, dc, diff, j, run; - int component; - RLTable *rl; - uint8_t * scantable= s->intra_scantable.permutated; - const uint16_t *quant_matrix; - const int qscale= s->qscale; - - /* DC coefficient */ - if (n < 4){ - quant_matrix = s->intra_matrix; - component = 0; - }else{ - quant_matrix = s->chroma_intra_matrix; - component = (n&1) + 1; - } - diff = decode_dc(&s->gb, component); - if (diff >= 0xffff) - return -1; - dc = s->last_dc[component]; - dc += diff; - s->last_dc[component] = dc; - block[0] = dc << (3 - s->intra_dc_precision); - if (s->intra_vlc_format) - rl = &ff_rl_mpeg2; - else - rl = &ff_rl_mpeg1; - - { - OPEN_READER(re, &s->gb); - /* now quantify & encode AC coefficients */ - for(;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if(level == 127){ - break; - } else if(level != 0) { - scantable += run; - j = *scantable; - level= (level*qscale*quant_matrix[j])>>4; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); - scantable += run; - j = *scantable; - if(level<0){ - level= (-level*qscale*quant_matrix[j])>>4; - level= -level; - }else{ - level= (level*qscale*quant_matrix[j])>>4; - } + if (pc->frame_start_found == 0 && s && state == PICTURE_START_CODE) { + ff_fetch_timestamp(s, i - 3, 1); } - - block[j] = level; - } - CLOSE_READER(re, &s->gb); - } - - s->block_last_index[n] = scantable - s->intra_scantable.permutated; - return 0; -} - -typedef struct Mpeg1Context { - MpegEncContext mpeg_enc_ctx; - int mpeg_enc_ctx_allocated; /* true if decoding context allocated */ - int repeat_field; /* true if we must repeat the field */ - AVPanScan pan_scan; /** some temporary storage for the panscan */ - int slice_count; - int swap_uv;//indicate VCR2 - int save_aspect_info; - int save_width, save_height, save_progressive_seq; - AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator - -} Mpeg1Context; - -static av_cold int mpeg_decode_init(AVCodecContext *avctx) -{ - Mpeg1Context *s = avctx->priv_data; - MpegEncContext *s2 = &s->mpeg_enc_ctx; - int i; - - /* we need some permutation to store matrices, - * until MPV_common_init() sets the real permutation. */ - for(i=0;i<64;i++) - s2->dsp.idct_permutation[i]=i; - - MPV_decode_defaults(s2); - - s->mpeg_enc_ctx.avctx= avctx; - s->mpeg_enc_ctx.flags= avctx->flags; - s->mpeg_enc_ctx.flags2= avctx->flags2; - ff_mpeg12_common_init(&s->mpeg_enc_ctx); - ff_mpeg12_init_vlcs(); - - s->mpeg_enc_ctx_allocated = 0; - s->mpeg_enc_ctx.picture_number = 0; - s->repeat_field = 0; - s->mpeg_enc_ctx.codec_id= avctx->codec->id; - avctx->color_range= AVCOL_RANGE_MPEG; - if (avctx->codec->id == CODEC_ID_MPEG1VIDEO) - avctx->chroma_sample_location = AVCHROMA_LOC_CENTER; - else - avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; - return 0; -} - -static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm, - const uint8_t *new_perm){ - uint16_t temp_matrix[64]; - int i; - - memcpy(temp_matrix,matrix,64*sizeof(uint16_t)); - - for(i=0;i<64;i++){ - matrix[new_perm[i]] = temp_matrix[old_perm[i]]; - } -} - -static enum PixelFormat mpeg_get_pixelformat(AVCodecContext *avctx){ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - - if(avctx->xvmc_acceleration) - return avctx->get_format(avctx,pixfmt_xvmc_mpg2_420); - else if(avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){ - if(avctx->codec_id == CODEC_ID_MPEG1VIDEO) - return PIX_FMT_VDPAU_MPEG1; - else - return PIX_FMT_VDPAU_MPEG2; - }else{ - if(s->chroma_format < 2) - return avctx->get_format(avctx,ff_hwaccel_pixfmt_list_420); - else if(s->chroma_format == 2) - return PIX_FMT_YUV422P; - else - return PIX_FMT_YUV444P; - } -} - -/* Call this function when we know all parameters. - * It may be called in different places for MPEG-1 and MPEG-2. */ -static int mpeg_decode_postinit(AVCodecContext *avctx){ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - uint8_t old_permutation[64]; - - if ( - (s1->mpeg_enc_ctx_allocated == 0)|| - avctx->coded_width != s->width || - avctx->coded_height != s->height|| - s1->save_width != s->width || - s1->save_height != s->height || - s1->save_aspect_info != s->aspect_ratio_info|| - s1->save_progressive_seq != s->progressive_sequence || - 0) - { - - if (s1->mpeg_enc_ctx_allocated) { - ParseContext pc= s->parse_context; - s->parse_context.buffer=0; - MPV_common_end(s); - s->parse_context= pc; } - - if( (s->width == 0 )||(s->height == 0)) - return -2; - - avcodec_set_dimensions(avctx, s->width, s->height); - avctx->bit_rate = s->bit_rate; - s1->save_aspect_info = s->aspect_ratio_info; - s1->save_width = s->width; - s1->save_height = s->height; - s1->save_progressive_seq = s->progressive_sequence; - - /* low_delay may be forced, in this case we will have B-frames - * that behave like P-frames. */ - avctx->has_b_frames = !(s->low_delay); - - assert((avctx->sub_id==1) == (avctx->codec_id==CODEC_ID_MPEG1VIDEO)); - if(avctx->codec_id==CODEC_ID_MPEG1VIDEO){ - //MPEG-1 fps - avctx->time_base.den= ff_frame_rate_tab[s->frame_rate_index].num; - avctx->time_base.num= ff_frame_rate_tab[s->frame_rate_index].den; - //MPEG-1 aspect - avctx->sample_aspect_ratio= av_d2q( - 1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255); - avctx->ticks_per_frame=1; - }else{//MPEG-2 - //MPEG-2 fps - av_reduce( - &s->avctx->time_base.den, - &s->avctx->time_base.num, - ff_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2, - ff_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den, - 1<<30); - avctx->ticks_per_frame=2; - //MPEG-2 aspect - if(s->aspect_ratio_info > 1){ - //we ignore the spec here as reality does not match the spec, see for example - // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg - if( (s1->pan_scan.width == 0 )||(s1->pan_scan.height == 0) || 1){ - s->avctx->sample_aspect_ratio= - av_div_q( - ff_mpeg2_aspect[s->aspect_ratio_info], - (AVRational){s->width, s->height} - ); - }else{ - s->avctx->sample_aspect_ratio= - av_div_q( - ff_mpeg2_aspect[s->aspect_ratio_info], - (AVRational){s1->pan_scan.width, s1->pan_scan.height} - ); - } - }else{ - s->avctx->sample_aspect_ratio= - ff_mpeg2_aspect[s->aspect_ratio_info]; - } - }//MPEG-2 - - avctx->pix_fmt = mpeg_get_pixelformat(avctx); - avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt); - //until then pix_fmt may be changed right after codec init - if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT || - avctx->hwaccel || - s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU ) - if( avctx->idct_algo == FF_IDCT_AUTO ) - avctx->idct_algo = FF_IDCT_SIMPLE; - - /* Quantization matrices may need reordering - * if DCT permutation is changed. */ - memcpy(old_permutation,s->dsp.idct_permutation,64*sizeof(uint8_t)); - - if (MPV_common_init(s) < 0) - return -2; - - quant_matrix_rebuild(s->intra_matrix, old_permutation,s->dsp.idct_permutation); - quant_matrix_rebuild(s->inter_matrix, old_permutation,s->dsp.idct_permutation); - quant_matrix_rebuild(s->chroma_intra_matrix,old_permutation,s->dsp.idct_permutation); - quant_matrix_rebuild(s->chroma_inter_matrix,old_permutation,s->dsp.idct_permutation); - - s1->mpeg_enc_ctx_allocated = 1; } - return 0; + pc->state = state; + return END_NOT_FOUND; } - -static int mpeg1_decode_picture(AVCodecContext *avctx, - const uint8_t *buf, int buf_size) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - int ref, f_code, vbv_delay; - - init_get_bits(&s->gb, buf, buf_size*8); - - ref = get_bits(&s->gb, 10); /* temporal ref */ - s->pict_type = get_bits(&s->gb, 3); - if(s->pict_type == 0 || s->pict_type > 3) - return -1; - - vbv_delay= get_bits(&s->gb, 16); - if (s->pict_type == FF_P_TYPE || s->pict_type == FF_B_TYPE) { - s->full_pel[0] = get_bits1(&s->gb); - f_code = get_bits(&s->gb, 3); - if (f_code == 0 && avctx->error_recognition >= FF_ER_COMPLIANT) - return -1; - s->mpeg_f_code[0][0] = f_code; - s->mpeg_f_code[0][1] = f_code; - } - if (s->pict_type == FF_B_TYPE) { - s->full_pel[1] = get_bits1(&s->gb); - f_code = get_bits(&s->gb, 3); - if (f_code == 0 && avctx->error_recognition >= FF_ER_COMPLIANT) - return -1; - s->mpeg_f_code[1][0] = f_code; - s->mpeg_f_code[1][1] = f_code; - } - s->current_picture.pict_type= s->pict_type; - s->current_picture.key_frame= s->pict_type == FF_I_TYPE; - - if(avctx->debug & FF_DEBUG_PICT_INFO) - av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type); - - s->y_dc_scale = 8; - s->c_dc_scale = 8; - return 0; -} - -static void mpeg_decode_sequence_extension(Mpeg1Context *s1) -{ - MpegEncContext *s= &s1->mpeg_enc_ctx; - int horiz_size_ext, vert_size_ext; - int bit_rate_ext; - - skip_bits(&s->gb, 1); /* profile and level esc*/ - s->avctx->profile= get_bits(&s->gb, 3); - s->avctx->level= get_bits(&s->gb, 4); - s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */ - s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */ - horiz_size_ext = get_bits(&s->gb, 2); - vert_size_ext = get_bits(&s->gb, 2); - s->width |= (horiz_size_ext << 12); - s->height |= (vert_size_ext << 12); - bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */ - s->bit_rate += (bit_rate_ext << 18) * 400; - skip_bits1(&s->gb); /* marker */ - s->avctx->rc_buffer_size += get_bits(&s->gb, 8)*1024*16<<10; - - s->low_delay = get_bits1(&s->gb); - if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1; - - s1->frame_rate_ext.num = get_bits(&s->gb, 2)+1; - s1->frame_rate_ext.den = get_bits(&s->gb, 5)+1; - - dprintf(s->avctx, "sequence extension\n"); - s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO; - s->avctx->sub_id = 2; /* indicates MPEG-2 found */ - - if(s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n", - s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate); - -} - -static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1) -{ - MpegEncContext *s= &s1->mpeg_enc_ctx; - int color_description, w, h; - - skip_bits(&s->gb, 3); /* video format */ - color_description= get_bits1(&s->gb); - if(color_description){ - s->avctx->color_primaries= get_bits(&s->gb, 8); - s->avctx->color_trc = get_bits(&s->gb, 8); - s->avctx->colorspace = get_bits(&s->gb, 8); - } - w= get_bits(&s->gb, 14); - skip_bits(&s->gb, 1); //marker - h= get_bits(&s->gb, 14); - skip_bits(&s->gb, 1); //marker - - s1->pan_scan.width= 16*w; - s1->pan_scan.height=16*h; - - if(s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h); -} - -static void mpeg_decode_picture_display_extension(Mpeg1Context *s1) -{ - MpegEncContext *s= &s1->mpeg_enc_ctx; - int i,nofco; - - nofco = 1; - if(s->progressive_sequence){ - if(s->repeat_first_field){ - nofco++; - if(s->top_field_first) - nofco++; - } - }else{ - if(s->picture_structure == PICT_FRAME){ - nofco++; - if(s->repeat_first_field) - nofco++; - } - } - for(i=0; ipan_scan.position[i][0]= get_sbits(&s->gb, 16); - skip_bits(&s->gb, 1); //marker - s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16); - skip_bits(&s->gb, 1); //marker - } - - if(s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n", - s1->pan_scan.position[0][0], s1->pan_scan.position[0][1], - s1->pan_scan.position[1][0], s1->pan_scan.position[1][1], - s1->pan_scan.position[2][0], s1->pan_scan.position[2][1] - ); -} - -static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra){ - int i; - - for(i=0; i<64; i++) { - int j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - int v = get_bits(&s->gb, 8); - if(v==0){ - av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n"); - return -1; - } - if(intra && i==0 && v!=8){ - av_log(s->avctx, AV_LOG_ERROR, "intra matrix invalid, ignoring\n"); - v= 8; // needed by pink.mpg / issue1046 - } - matrix0[j] = v; - if(matrix1) - matrix1[j] = v; - } - return 0; -} - -static void mpeg_decode_quant_matrix_extension(MpegEncContext *s) -{ - dprintf(s->avctx, "matrix extension\n"); - - if(get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1); - if(get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0); - if(get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1); - if(get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0); -} - -static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1) -{ - MpegEncContext *s= &s1->mpeg_enc_ctx; - - s->full_pel[0] = s->full_pel[1] = 0; - s->mpeg_f_code[0][0] = get_bits(&s->gb, 4); - s->mpeg_f_code[0][1] = get_bits(&s->gb, 4); - s->mpeg_f_code[1][0] = get_bits(&s->gb, 4); - s->mpeg_f_code[1][1] = get_bits(&s->gb, 4); - if(!s->pict_type && s1->mpeg_enc_ctx_allocated){ - av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n"); - if(s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1]==15){ - if(s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15) - s->pict_type= FF_I_TYPE; - else - s->pict_type= FF_P_TYPE; - }else - s->pict_type= FF_B_TYPE; - s->current_picture.pict_type= s->pict_type; - s->current_picture.key_frame= s->pict_type == FF_I_TYPE; - } - s->intra_dc_precision = get_bits(&s->gb, 2); - s->picture_structure = get_bits(&s->gb, 2); - s->top_field_first = get_bits1(&s->gb); - s->frame_pred_frame_dct = get_bits1(&s->gb); - s->concealment_motion_vectors = get_bits1(&s->gb); - s->q_scale_type = get_bits1(&s->gb); - s->intra_vlc_format = get_bits1(&s->gb); - s->alternate_scan = get_bits1(&s->gb); - s->repeat_first_field = get_bits1(&s->gb); - s->chroma_420_type = get_bits1(&s->gb); - s->progressive_frame = get_bits1(&s->gb); - - if(s->progressive_sequence && !s->progressive_frame){ - s->progressive_frame= 1; - av_log(s->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n"); - } - - if(s->picture_structure==0 || (s->progressive_frame && s->picture_structure!=PICT_FRAME)){ - av_log(s->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s->picture_structure); - s->picture_structure= PICT_FRAME; - } - - if(s->progressive_frame && !s->frame_pred_frame_dct){ - av_log(s->avctx, AV_LOG_ERROR, "invalid frame_pred_frame_dct\n"); - s->frame_pred_frame_dct= 1; - } - - if(s->picture_structure == PICT_FRAME){ - s->first_field=0; - s->v_edge_pos= 16*s->mb_height; - }else{ - s->first_field ^= 1; - s->v_edge_pos= 8*s->mb_height; - memset(s->mbskip_table, 0, s->mb_stride*s->mb_height); - } - - 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); - }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); - } - - /* composite display not parsed */ - dprintf(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision); - dprintf(s->avctx, "picture_structure=%d\n", s->picture_structure); - dprintf(s->avctx, "top field first=%d\n", s->top_field_first); - dprintf(s->avctx, "repeat first field=%d\n", s->repeat_first_field); - dprintf(s->avctx, "conceal=%d\n", s->concealment_motion_vectors); - dprintf(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format); - dprintf(s->avctx, "alternate_scan=%d\n", s->alternate_scan); - dprintf(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct); - dprintf(s->avctx, "progressive_frame=%d\n", s->progressive_frame); -} - -static void exchange_uv(MpegEncContext *s){ - DCTELEM (*tmp)[64]; - - tmp = s->pblocks[4]; - s->pblocks[4] = s->pblocks[5]; - s->pblocks[5] = tmp; -} - -static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size){ - AVCodecContext *avctx= s->avctx; - Mpeg1Context *s1 = (Mpeg1Context*)s; - - /* start frame decoding */ - if(s->first_field || s->picture_structure==PICT_FRAME){ - if(MPV_frame_start(s, avctx) < 0) - return -1; - - ff_er_frame_start(s); - - /* first check if we must repeat the frame */ - s->current_picture_ptr->repeat_pict = 0; - if (s->repeat_first_field) { - if (s->progressive_sequence) { - if (s->top_field_first) - s->current_picture_ptr->repeat_pict = 4; - else - s->current_picture_ptr->repeat_pict = 2; - } else if (s->progressive_frame) { - s->current_picture_ptr->repeat_pict = 1; - } - } - - *s->current_picture_ptr->pan_scan= s1->pan_scan; - }else{ //second field - int i; - - if(!s->current_picture_ptr){ - av_log(s->avctx, AV_LOG_ERROR, "first field missing\n"); - return -1; - } - - for(i=0; i<4; i++){ - s->current_picture.data[i] = s->current_picture_ptr->data[i]; - if(s->picture_structure == PICT_BOTTOM_FIELD){ - s->current_picture.data[i] += s->current_picture_ptr->linesize[i]; - } - } - } - - if (avctx->hwaccel) { - if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0) - return -1; - } - -// MPV_frame_start will call this function too, -// but we need to call it on every field - if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration) - if(ff_xvmc_field_start(s,avctx) < 0) - return -1; - - return 0; -} - -#define DECODE_SLICE_ERROR -1 -#define DECODE_SLICE_OK 0 - -/** - * decodes a slice. MpegEncContext.mb_y must be set to the MB row from the startcode - * @return DECODE_SLICE_ERROR if the slice is damaged
- * DECODE_SLICE_OK if this slice is ok
- */ -static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y, - const uint8_t **buf, int buf_size) -{ - MpegEncContext *s = &s1->mpeg_enc_ctx; - AVCodecContext *avctx= s->avctx; - const int field_pic= s->picture_structure != PICT_FRAME; - const int lowres= s->avctx->lowres; - - s->resync_mb_x= - s->resync_mb_y= -1; - - if (mb_y<= s->mb_height){ - av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s->mb_height); - return -1; - } - - init_get_bits(&s->gb, *buf, buf_size*8); - - ff_mpeg1_clean_buffers(s); - s->interlaced_dct = 0; - - s->qscale = get_qscale(s); - - if(s->qscale == 0){ - av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n"); - return -1; - } - - /* extra slice info */ - while (get_bits1(&s->gb) != 0) { - skip_bits(&s->gb, 8); - } - - s->mb_x=0; - - for(;;) { - int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2); - if (code < 0){ - av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n"); - return -1; - } - if (code >= 33) { - if (code == 33) { - s->mb_x += 33; - } - /* otherwise, stuffing, nothing to do */ - } else { - s->mb_x += code; - break; - } - } - if(s->mb_x >= (unsigned)s->mb_width){ - av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n"); - return -1; - } - - if (avctx->hwaccel) { - const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */ - int start_code = -1; - buf_end = ff_find_start_code(buf_start + 2, *buf + buf_size, &start_code); - if (buf_end < *buf + buf_size) - buf_end -= 4; - s->mb_y = mb_y; - if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0) - return DECODE_SLICE_ERROR; - *buf = buf_end; - return DECODE_SLICE_OK; - } - - s->resync_mb_x= s->mb_x; - s->resync_mb_y= s->mb_y= mb_y; - s->mb_skip_run= 0; - ff_init_block_index(s); - - if (s->mb_y==0 && s->mb_x==0 && (s->first_field || s->picture_structure==PICT_FRAME)) { - if(s->avctx->debug&FF_DEBUG_PICT_INFO){ - av_log(s->avctx, AV_LOG_DEBUG, "qp:%d fc:%2d%2d%2d%2d %s %s %s %s %s dc:%d pstruct:%d fdct:%d cmv:%d qtype:%d ivlc:%d rff:%d %s\n", - s->qscale, s->mpeg_f_code[0][0],s->mpeg_f_code[0][1],s->mpeg_f_code[1][0],s->mpeg_f_code[1][1], - s->pict_type == FF_I_TYPE ? "I" : (s->pict_type == FF_P_TYPE ? "P" : (s->pict_type == FF_B_TYPE ? "B" : "S")), - s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"", - s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors, - s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :""); - } - } - - for(;;) { - //If 1, we memcpy blocks in xvmcvideo. - if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) - ff_xvmc_init_block(s);//set s->block - - if(mpeg_decode_mb(s, s->block) < 0) - return -1; - - if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs - const int wrap = field_pic ? 2*s->b8_stride : s->b8_stride; - int xy = s->mb_x*2 + s->mb_y*2*wrap; - int motion_x, motion_y, dir, i; - if(field_pic && !s->first_field) - xy += wrap/2; - - for(i=0; i<2; i++){ - for(dir=0; dir<2; dir++){ - if (s->mb_intra || (dir==1 && s->pict_type != FF_B_TYPE)) { - motion_x = motion_y = 0; - }else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)){ - motion_x = s->mv[dir][0][0]; - motion_y = s->mv[dir][0][1]; - } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ { - motion_x = s->mv[dir][i][0]; - motion_y = s->mv[dir][i][1]; - } - - s->current_picture.motion_val[dir][xy ][0] = motion_x; - s->current_picture.motion_val[dir][xy ][1] = motion_y; - s->current_picture.motion_val[dir][xy + 1][0] = motion_x; - s->current_picture.motion_val[dir][xy + 1][1] = motion_y; - s->current_picture.ref_index [dir][xy ]= - s->current_picture.ref_index [dir][xy + 1]= s->field_select[dir][i]; - assert(s->field_select[dir][i]==0 || s->field_select[dir][i]==1); - } - xy += wrap; - } - } - - s->dest[0] += 16 >> lowres; - s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift; - s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift; - - MPV_decode_mb(s, s->block); - - if (++s->mb_x >= s->mb_width) { - const int mb_size= 16>>s->avctx->lowres; - - ff_draw_horiz_band(s, mb_size*s->mb_y, mb_size); - - s->mb_x = 0; - s->mb_y++; - - if(s->mb_y<= s->mb_height){ - int left= get_bits_left(&s->gb); - int is_d10= s->chroma_format==2 && s->pict_type==FF_I_TYPE && avctx->profile==0 && avctx->level==5 - && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0 - && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/; - - if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) - || (avctx->error_recognition >= FF_ER_AGGRESSIVE && left>8)){ - av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23))); - return -1; - }else - goto eos; - } - - ff_init_block_index(s); - } - - /* skip mb handling */ - if (s->mb_skip_run == -1) { - /* read increment again */ - s->mb_skip_run = 0; - for(;;) { - int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2); - if (code < 0){ - av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n"); - return -1; - } - if (code >= 33) { - if (code == 33) { - s->mb_skip_run += 33; - }else if(code == 35){ - if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){ - av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n"); - return -1; - } - goto eos; /* end of slice */ - } - /* otherwise, stuffing, nothing to do */ - } else { - s->mb_skip_run += code; - break; - } - } - if(s->mb_skip_run){ - int i; - if(s->pict_type == FF_I_TYPE){ - av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - /* skip mb */ - s->mb_intra = 0; - for(i=0;i<12;i++) - s->block_last_index[i] = -1; - if(s->picture_structure == PICT_FRAME) - s->mv_type = MV_TYPE_16X16; - else - s->mv_type = MV_TYPE_FIELD; - if (s->pict_type == FF_P_TYPE) { - /* if P type, zero motion vector is implied */ - s->mv_dir = MV_DIR_FORWARD; - s->mv[0][0][0] = s->mv[0][0][1] = 0; - s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0; - s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0; - s->field_select[0][0]= (s->picture_structure - 1) & 1; - } else { - /* if B type, reuse previous vectors and directions */ - s->mv[0][0][0] = s->last_mv[0][0][0]; - s->mv[0][0][1] = s->last_mv[0][0][1]; - s->mv[1][0][0] = s->last_mv[1][0][0]; - s->mv[1][0][1] = s->last_mv[1][0][1]; - } - } - } - } -eos: // end of slice - *buf += (get_bits_count(&s->gb)-1)/8; -//printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y); - return 0; -} - -static int slice_decode_thread(AVCodecContext *c, void *arg){ - MpegEncContext *s= *(void**)arg; - const uint8_t *buf= s->gb.buffer; - int mb_y= s->start_mb_y; - - s->error_count= 3*(s->end_mb_y - s->start_mb_y)*s->mb_width; - - for(;;){ - uint32_t start_code; - int ret; - - ret= mpeg_decode_slice((Mpeg1Context*)s, mb_y, &buf, s->gb.buffer_end - buf); - emms_c(); -//av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n", -//ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, s->start_mb_y, s->end_mb_y, s->error_count); - if(ret < 0){ - if(s->resync_mb_x>=0 && s->resync_mb_y>=0) - ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, AC_ERROR|DC_ERROR|MV_ERROR); - }else{ - ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END); - } - - if(s->mb_y == s->end_mb_y) - return 0; - - start_code= -1; - buf = ff_find_start_code(buf, s->gb.buffer_end, &start_code); - mb_y= start_code - SLICE_MIN_START_CODE; - if(mb_y < 0 || mb_y >= s->end_mb_y) - return -1; - } - - return 0; //not reached -} - -/** - * Handles slice ends. - * @return 1 if it seems to be the last slice - */ -static int slice_end(AVCodecContext *avctx, AVFrame *pict) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - - if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr) - return 0; - - if (s->avctx->hwaccel) { - if (s->avctx->hwaccel->end_frame(s->avctx) < 0) - av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n"); - } - - if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration) - ff_xvmc_field_end(s); - - /* end of slice reached */ - if (/*s->mb_y<mb_height &&*/ !s->first_field) { - /* end of image */ - - s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2; - - ff_er_frame_end(s); - - MPV_frame_end(s); - - if (s->pict_type == FF_B_TYPE || s->low_delay) { - *pict= *(AVFrame*)s->current_picture_ptr; - ff_print_debug_info(s, pict); - } else { - s->picture_number++; - /* latency of 1 frame for I- and P-frames */ - /* XXX: use another variable than picture_number */ - if (s->last_picture_ptr != NULL) { - *pict= *(AVFrame*)s->last_picture_ptr; - ff_print_debug_info(s, pict); - } - } - - return 1; - } else { - return 0; - } -} - -static int mpeg1_decode_sequence(AVCodecContext *avctx, - const uint8_t *buf, int buf_size) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - int width,height; - int i, v, j; - - init_get_bits(&s->gb, buf, buf_size*8); - - width = get_bits(&s->gb, 12); - height = get_bits(&s->gb, 12); - if (width <= 0 || height <= 0) - return -1; - s->aspect_ratio_info= get_bits(&s->gb, 4); - if (s->aspect_ratio_info == 0) { - av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n"); - if (avctx->error_recognition >= FF_ER_COMPLIANT) - return -1; - } - s->frame_rate_index = get_bits(&s->gb, 4); - if (s->frame_rate_index == 0 || s->frame_rate_index > 13) - return -1; - s->bit_rate = get_bits(&s->gb, 18) * 400; - if (get_bits1(&s->gb) == 0) /* marker */ - return -1; - s->width = width; - s->height = height; - - s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16; - skip_bits(&s->gb, 1); - - /* get matrix */ - if (get_bits1(&s->gb)) { - load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1); - } else { - for(i=0;i<64;i++) { - j = s->dsp.idct_permutation[i]; - v = ff_mpeg1_default_intra_matrix[i]; - s->intra_matrix[j] = v; - s->chroma_intra_matrix[j] = v; - } - } - if (get_bits1(&s->gb)) { - load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0); - } else { - for(i=0;i<64;i++) { - int j= s->dsp.idct_permutation[i]; - v = ff_mpeg1_default_non_intra_matrix[i]; - s->inter_matrix[j] = v; - s->chroma_inter_matrix[j] = v; - } - } - - if(show_bits(&s->gb, 23) != 0){ - av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n"); - return -1; - } - - /* we set MPEG-2 parameters so that it emulates MPEG-1 */ - s->progressive_sequence = 1; - s->progressive_frame = 1; - s->picture_structure = PICT_FRAME; - s->frame_pred_frame_dct = 1; - s->chroma_format = 1; - s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO; - avctx->sub_id = 1; /* indicates MPEG-1 */ - s->out_format = FMT_MPEG1; - s->swap_uv = 0;//AFAIK VCR2 does not have SEQ_HEADER - if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1; - - if(s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n", - s->avctx->rc_buffer_size, s->bit_rate); - - return 0; -} - -static int vcr2_init_sequence(AVCodecContext *avctx) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - int i, v; - - /* start new MPEG-1 context decoding */ - s->out_format = FMT_MPEG1; - if (s1->mpeg_enc_ctx_allocated) { - MPV_common_end(s); - } - s->width = avctx->coded_width; - s->height = avctx->coded_height; - avctx->has_b_frames= 0; //true? - s->low_delay= 1; - - avctx->pix_fmt = mpeg_get_pixelformat(avctx); - avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt); - - if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT || avctx->hwaccel || - s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU ) - if( avctx->idct_algo == FF_IDCT_AUTO ) - avctx->idct_algo = FF_IDCT_SIMPLE; - - if (MPV_common_init(s) < 0) - return -1; - exchange_uv(s);//common init reset pblocks, so we swap them here - s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB - s1->mpeg_enc_ctx_allocated = 1; - - for(i=0;i<64;i++) { - int j= s->dsp.idct_permutation[i]; - v = ff_mpeg1_default_intra_matrix[i]; - s->intra_matrix[j] = v; - s->chroma_intra_matrix[j] = v; - - v = ff_mpeg1_default_non_intra_matrix[i]; - s->inter_matrix[j] = v; - s->chroma_inter_matrix[j] = v; - } - - s->progressive_sequence = 1; - s->progressive_frame = 1; - s->picture_structure = PICT_FRAME; - s->frame_pred_frame_dct = 1; - s->chroma_format = 1; - s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO; - avctx->sub_id = 2; /* indicates MPEG-2 */ - return 0; -} - - -static void mpeg_decode_user_data(AVCodecContext *avctx, - const uint8_t *p, int buf_size) -{ - const uint8_t *buf_end = p+buf_size; - - /* we parse the DTG active format information */ - if (buf_end - p >= 5 && - p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') { - int flags = p[4]; - p += 5; - if (flags & 0x80) { - /* skip event id */ - p += 2; - } - if (flags & 0x40) { - if (buf_end - p < 1) - return; - avctx->dtg_active_format = p[0] & 0x0f; - } - } -} - -static void mpeg_decode_gop(AVCodecContext *avctx, - const uint8_t *buf, int buf_size){ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - - int drop_frame_flag; - int time_code_hours, time_code_minutes; - int time_code_seconds, time_code_pictures; - int broken_link; - - init_get_bits(&s->gb, buf, buf_size*8); - - drop_frame_flag = get_bits1(&s->gb); - - time_code_hours=get_bits(&s->gb,5); - time_code_minutes = get_bits(&s->gb,6); - skip_bits1(&s->gb);//marker bit - time_code_seconds = get_bits(&s->gb,6); - time_code_pictures = get_bits(&s->gb,6); - - s->closed_gop = get_bits1(&s->gb); - /*broken_link indicate that after editing the - reference frames of the first B-Frames after GOP I-Frame - are missing (open gop)*/ - broken_link = get_bits1(&s->gb); - - if(s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) closed_gop=%d broken_link=%d\n", - time_code_hours, time_code_minutes, time_code_seconds, - time_code_pictures, s->closed_gop, broken_link); -} -/** - * Finds the end of the current frame in the bitstream. - * @return the position of the first byte of the next frame, or -1 - */ -int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s) -{ - int i; - uint32_t state= pc->state; - - /* EOF considered as end of frame */ - if (buf_size == 0) - return 0; - -/* - 0 frame start -> 1/4 - 1 first_SEQEXT -> 0/2 - 2 first field start -> 3/0 - 3 second_SEQEXT -> 2/0 - 4 searching end -*/ - - for(i=0; iframe_start_found>=0 && pc->frame_start_found<=4); - if(pc->frame_start_found&1){ - if(state == EXT_START_CODE && (buf[i]&0xF0) != 0x80) - pc->frame_start_found--; - else if(state == EXT_START_CODE+2){ - if((buf[i]&3) == 3) pc->frame_start_found= 0; - else pc->frame_start_found= (pc->frame_start_found+1)&3; - } - state++; - }else{ - i= ff_find_start_code(buf+i, buf+buf_size, &state) - buf - 1; - if(pc->frame_start_found==0 && state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){ - i++; - pc->frame_start_found=4; - } - if(state == SEQ_END_CODE){ - pc->state=-1; - return i+1; - } - if(pc->frame_start_found==2 && state == SEQ_START_CODE) - pc->frame_start_found= 0; - if(pc->frame_start_found<4 && state == EXT_START_CODE) - pc->frame_start_found++; - if(pc->frame_start_found == 4 && (state&0xFFFFFF00) == 0x100){ - if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){ - pc->frame_start_found=0; - pc->state=-1; - return i-3; - } - } - if(s && state == PICTURE_START_CODE){ - ff_fetch_timestamp(s, i-3, 1); - } - } - } - pc->state= state; - return END_NOT_FOUND; -} - -static int decode_chunks(AVCodecContext *avctx, - AVFrame *picture, int *data_size, - const uint8_t *buf, int buf_size); - -/* handle buffering and image synchronisation */ -static int mpeg_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - AVPacket *avpkt) -{ - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; - Mpeg1Context *s = avctx->priv_data; - AVFrame *picture = data; - MpegEncContext *s2 = &s->mpeg_enc_ctx; - dprintf(avctx, "fill_buffer\n"); - - if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) { - /* special case for last picture */ - if (s2->low_delay==0 && s2->next_picture_ptr) { - *picture= *(AVFrame*)s2->next_picture_ptr; - s2->next_picture_ptr= NULL; - - *data_size = sizeof(AVFrame); - } - return buf_size; - } - - if(s2->flags&CODEC_FLAG_TRUNCATED){ - int next= ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL); - - if( ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0 ) - return buf_size; - } - -#if 0 - if (s->repeat_field % 2 == 1) { - s->repeat_field++; - //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number, - // s2->picture_number, s->repeat_field); - if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) { - *data_size = sizeof(AVPicture); - goto the_end; - } - } -#endif - - if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == AV_RL32("VCR2")) - vcr2_init_sequence(avctx); - - s->slice_count= 0; - - if(avctx->extradata && !avctx->frame_number) - decode_chunks(avctx, picture, data_size, avctx->extradata, avctx->extradata_size); - - return decode_chunks(avctx, picture, data_size, buf, buf_size); -} - -static int decode_chunks(AVCodecContext *avctx, - AVFrame *picture, int *data_size, - const uint8_t *buf, int buf_size) -{ - Mpeg1Context *s = avctx->priv_data; - MpegEncContext *s2 = &s->mpeg_enc_ctx; - const uint8_t *buf_ptr = buf; - const uint8_t *buf_end = buf + buf_size; - int ret, input_size; - int last_code= 0; - - for(;;) { - /* find next start code */ - uint32_t start_code = -1; - buf_ptr = ff_find_start_code(buf_ptr,buf_end, &start_code); - if (start_code > 0x1ff){ - if(s2->pict_type != FF_B_TYPE || avctx->skip_frame <= AVDISCARD_DEFAULT){ - if(avctx->thread_count > 1){ - int i; - - avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*)); - for(i=0; islice_count; i++) - s2->error_count += s2->thread_context[i]->error_count; - } - - if (CONFIG_MPEG_VDPAU_DECODER && avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU) - ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count); - - if (slice_end(avctx, picture)) { - if(s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice - *data_size = sizeof(AVPicture); - } - } - s2->pict_type= 0; - return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index); - } - - input_size = buf_end - buf_ptr; - - if(avctx->debug & FF_DEBUG_STARTCODE){ - av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size); - } - - /* prepare data for next start code */ - switch(start_code) { - case SEQ_START_CODE: - if(last_code == 0){ - mpeg1_decode_sequence(avctx, buf_ptr, - input_size); - }else{ - av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code); - } - break; - - case PICTURE_START_CODE: - if(last_code == 0 || last_code == SLICE_MIN_START_CODE){ - if(mpeg_decode_postinit(avctx) < 0){ - av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n"); - return -1; - } - - /* we have a complete image: we try to decompress it */ - if(mpeg1_decode_picture(avctx, - buf_ptr, input_size) < 0) - s2->pict_type=0; - s2->first_slice = 1; - last_code= PICTURE_START_CODE; - }else{ - av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code); - } - break; - case EXT_START_CODE: - init_get_bits(&s2->gb, buf_ptr, input_size*8); - - switch(get_bits(&s2->gb, 4)) { - case 0x1: - if(last_code == 0){ - mpeg_decode_sequence_extension(s); - }else{ - av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code); - } - break; - case 0x2: - mpeg_decode_sequence_display_extension(s); - break; - case 0x3: - mpeg_decode_quant_matrix_extension(s2); - break; - case 0x7: - mpeg_decode_picture_display_extension(s); - break; - case 0x8: - if(last_code == PICTURE_START_CODE){ - mpeg_decode_picture_coding_extension(s); - }else{ - av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code); - } - break; - } - break; - case USER_START_CODE: - mpeg_decode_user_data(avctx, - buf_ptr, input_size); - break; - case GOP_START_CODE: - if(last_code == 0){ - s2->first_field=0; - mpeg_decode_gop(avctx, - buf_ptr, input_size); - }else{ - av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code); - } - break; - default: - if (start_code >= SLICE_MIN_START_CODE && - start_code <= SLICE_MAX_START_CODE && last_code!=0) { - int mb_y= start_code - SLICE_MIN_START_CODE; - last_code= SLICE_MIN_START_CODE; - - if(s2->last_picture_ptr==NULL){ - /* Skip B-frames if we do not have reference frames and gop is not closed */ - if(s2->pict_type==FF_B_TYPE){ - if(!s2->closed_gop) - break; - } - } - if(s2->next_picture_ptr==NULL){ - /* Skip P-frames if we do not have a reference frame or we have an invalid header. */ - if(s2->pict_type==FF_P_TYPE && (s2->first_field || s2->picture_structure==PICT_FRAME)) break; - } - /* Skip B-frames if we are in a hurry. */ - if(avctx->hurry_up && s2->pict_type==FF_B_TYPE) break; - if( (avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type==FF_B_TYPE) - ||(avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type!=FF_I_TYPE) - || avctx->skip_frame >= AVDISCARD_ALL) - break; - /* Skip everything if we are in a hurry>=5. */ - if(avctx->hurry_up>=5) break; - - if (!s->mpeg_enc_ctx_allocated) break; - - if(s2->codec_id == CODEC_ID_MPEG2VIDEO){ - if(mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom) - break; - } - - if(!s2->pict_type){ - av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n"); - break; - } - - if(s2->first_slice){ - s2->first_slice=0; - if(mpeg_field_start(s2, buf, buf_size) < 0) - return -1; - } - if(!s2->current_picture_ptr){ - av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n"); - return -1; - } - - if(s2->last_picture_ptr==NULL && s2->pict_type!=FF_I_TYPE){ - int i; - /* Allocate a dummy frame */ - i= ff_find_unused_picture(s2, 0); - s2->last_picture_ptr= &s2->picture[i]; - if(ff_alloc_picture(s2, s2->last_picture_ptr, 0) < 0) - return -1; - s2->last_picture= *s2->last_picture_ptr; - } - if(s2->next_picture_ptr==NULL && s2->pict_type==FF_B_TYPE){ - int i; - /* Allocate a dummy frame */ - i= ff_find_unused_picture(s2, 0); - s2->next_picture_ptr= &s2->picture[i]; - if(ff_alloc_picture(s2, s2->next_picture_ptr, 0) < 0) - return -1; - s2->next_picture= *s2->next_picture_ptr; - } - - if (avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU) { - s->slice_count++; - break; - } - - if(avctx->thread_count > 1){ - int threshold= (s2->mb_height*s->slice_count + avctx->thread_count/2) / avctx->thread_count; - if(threshold <= mb_y){ - MpegEncContext *thread_context= s2->thread_context[s->slice_count]; - - thread_context->start_mb_y= mb_y; - thread_context->end_mb_y = s2->mb_height; - if(s->slice_count){ - s2->thread_context[s->slice_count-1]->end_mb_y= mb_y; - ff_update_duplicate_context(thread_context, s2); - } - init_get_bits(&thread_context->gb, buf_ptr, input_size*8); - s->slice_count++; - } - buf_ptr += 2; //FIXME add minimum number of bytes per slice - }else{ - ret = mpeg_decode_slice(s, mb_y, &buf_ptr, input_size); - emms_c(); - - if(ret < 0){ - if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0) - ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x, s2->mb_y, AC_ERROR|DC_ERROR|MV_ERROR); - }else{ - ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x-1, s2->mb_y, AC_END|DC_END|MV_END); - } - } - } - break; - } - } -} - -static int mpeg_decode_end(AVCodecContext *avctx) -{ - Mpeg1Context *s = avctx->priv_data; - - if (s->mpeg_enc_ctx_allocated) - MPV_common_end(&s->mpeg_enc_ctx); - return 0; -} - -AVCodec mpeg1video_decoder = { - "mpeg1video", - CODEC_TYPE_VIDEO, - CODEC_ID_MPEG1VIDEO, - sizeof(Mpeg1Context), - mpeg_decode_init, - NULL, - mpeg_decode_end, - mpeg_decode_frame, - CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY, - .flush= ff_mpeg_flush, - .long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"), -}; - -AVCodec mpeg2video_decoder = { - "mpeg2video", - CODEC_TYPE_VIDEO, - CODEC_ID_MPEG2VIDEO, - sizeof(Mpeg1Context), - mpeg_decode_init, - NULL, - mpeg_decode_end, - mpeg_decode_frame, - CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY, - .flush= ff_mpeg_flush, - .long_name= NULL_IF_CONFIG_SMALL("MPEG-2 video"), -}; - -//legacy decoder -AVCodec mpegvideo_decoder = { - "mpegvideo", - CODEC_TYPE_VIDEO, - CODEC_ID_MPEG2VIDEO, - sizeof(Mpeg1Context), - mpeg_decode_init, - NULL, - mpeg_decode_end, - mpeg_decode_frame, - CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY, - .flush= ff_mpeg_flush, - .long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"), -}; - -#if CONFIG_MPEG_XVMC_DECODER -static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx){ - if( avctx->thread_count > 1) - return -1; - if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) ) - return -1; - if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){ - dprintf(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n"); - } - mpeg_decode_init(avctx); - - avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT; - avctx->xvmc_acceleration = 2;//2 - the blocks are packed! - - return 0; -} - -AVCodec mpeg_xvmc_decoder = { - "mpegvideo_xvmc", - CODEC_TYPE_VIDEO, - CODEC_ID_MPEG2VIDEO_XVMC, - sizeof(Mpeg1Context), - mpeg_mc_decode_init, - NULL, - mpeg_decode_end, - mpeg_decode_frame, - CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY, - .flush= ff_mpeg_flush, - .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"), -}; - -#endif - -#if CONFIG_MPEG_VDPAU_DECODER -AVCodec mpeg_vdpau_decoder = { - "mpegvideo_vdpau", - CODEC_TYPE_VIDEO, - CODEC_ID_MPEG2VIDEO, - sizeof(Mpeg1Context), - mpeg_decode_init, - NULL, - mpeg_decode_end, - mpeg_decode_frame, - CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY, - .flush= ff_mpeg_flush, - .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"), -}; -#endif - -#if CONFIG_MPEG1_VDPAU_DECODER -AVCodec mpeg1_vdpau_decoder = { - "mpeg1video_vdpau", - CODEC_TYPE_VIDEO, - CODEC_ID_MPEG1VIDEO, - sizeof(Mpeg1Context), - mpeg_decode_init, - NULL, - mpeg_decode_end, - mpeg_decode_frame, - CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY, - .flush= ff_mpeg_flush, - .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"), -}; -#endif -