| /* |
| * MPEG-1/2 decoder |
| * Copyright (c) 2000, 2001 Fabrice Bellard |
| * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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, |
| * 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 |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * MPEG-1/2 decoder |
| */ |
| |
| #define UNCHECKED_BITSTREAM_READER 1 |
| |
| //#define DEBUG |
| #include "internal.h" |
| #include "avcodec.h" |
| #include "dsputil.h" |
| #include "mpegvideo.h" |
| #include "libavutil/avassert.h" |
| #include "libavutil/timecode.h" |
| |
| #include "mpeg12.h" |
| #include "mpeg12data.h" |
| #include "mpeg12decdata.h" |
| #include "bytestream.h" |
| #include "vdpau_internal.h" |
| #include "xvmc_internal.h" |
| #include "thread.h" |
| |
| |
| #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 VLC mv_vlc; |
| |
| /* as H.263, but only 17 codes */ |
| static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred) |
| { |
| int code, sign, val, 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 */ |
| return sign_extend(val, 5 + shift); |
| } |
| |
| 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]; |
| av_dlog(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; |
| } |
| /* 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 (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) |
| break; |
| UPDATE_CACHE(re, &s->gb); |
| } |
| end: |
| LAST_SKIP_BITS(re, &s->gb, 2); |
| CLOSE_READER(re, &s->gb); |
| } |
| s->block_last_index[n] = i; |
| return 0; |
| } |
| |
| /** |
| * Note: this function can read out of range and crash for corrupt streams. |
| * Changing this would eat up any speed benefits it has. |
| * Do not use "fast" flag if you need the code to be robust. |
| */ |
| 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; |
| } |
| |
| /* 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 (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) |
| break; |
| UPDATE_CACHE(re, &s->gb); |
| } |
| 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; |
| } |
| |
| /* 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; |
| } |
| |
| mismatch ^= level; |
| block[j] = level; |
| if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) |
| break; |
| UPDATE_CACHE(re, &s->gb); |
| } |
| 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; |
| } |
| |
| /** |
| * Note: this function can read out of range and crash for corrupt streams. |
| * Changing this would eat up any speed benefits it has. |
| * Do not use "fast" flag if you need the code to be robust. |
| */ |
| 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; |
| } |
| |
| /* 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; |
| } |
| } |
| |
| block[j] = level; |
| if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) |
| break; |
| UPDATE_CACHE(re, &s->gb); |
| } |
| 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); |
| av_dlog(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 (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; |
| } |
| |
| /** |
| * Note: this function can read out of range and crash for corrupt streams. |
| * Changing this would eat up any speed benefits it has. |
| * Do not use "fast" flag if you need the code to be robust. |
| */ |
| 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; |
| } |
| } |
| |
| block[j] = level; |
| } |
| CLOSE_READER(re, &s->gb); |
| } |
| |
| s->block_last_index[n] = scantable - s->intra_scantable.permutated; |
| return 0; |
| } |
| |
| 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.rl_vlc[0] = rl_vlc_table;\ |
| init_2d_vlc_rl(&rl);\ |
| } |
| |
| static void init_2d_vlc_rl(RLTable *rl) |
| { |
| int i; |
| |
| 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]; |
| } |
| } |
| 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) |
| { |
| |
| 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) |
| { |
| 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]; |
| memset(s->last_mv, 0, sizeof(s->last_mv)); |
| } |
| |
| |
| /******************************************/ |
| /* decoding */ |
| |
| VLC ff_dc_lum_vlc; |
| VLC ff_dc_chroma_vlc; |
| |
| static VLC mbincr_vlc; |
| static VLC mb_ptype_vlc; |
| static VLC mb_btype_vlc; |
| static VLC mb_pat_vlc; |
| |
| av_cold void ff_mpeg12_init_vlcs(void) |
| { |
| static int done = 0; |
| |
| if (!done) { |
| done = 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(&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); |
| 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; |
| } |
| } |
| |
| static void exchange_uv(MpegEncContext *s) |
| { |
| DCTELEM (*tmp)[64]; |
| |
| tmp = s->pblocks[4]; |
| s->pblocks[4] = s->pblocks[5]; |
| s->pblocks[5] = tmp; |
| } |
| |
| /* 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]) |
| { |
| int i, j, k, cbp, val, mb_type, motion_type; |
| const int mb_block_count = 4 + (1 << s->chroma_format); |
| |
| av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y); |
| |
| av_assert2(s->mb_skipped == 0); |
| |
| if (s->mb_skip_run-- != 0) { |
| if (s->pict_type == AV_PICTURE_TYPE_P) { |
| s->mb_skipped = 1; |
| s->current_picture.f.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.f.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1]; |
| else |
| mb_type = s->current_picture.f.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)) { |
| av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n"); |
| return -1; |
| } |
| s->current_picture.f.mb_type[s->mb_x + s->mb_y*s->mb_stride] = |
| mb_type | MB_TYPE_SKIP; |
| // av_assert2(s->current_picture.f.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; |
| } |
| |
| return 0; |
| } |
| |
| switch (s->pict_type) { |
| default: |
| case AV_PICTURE_TYPE_I: |
| 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 AV_PICTURE_TYPE_P: |
| 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 AV_PICTURE_TYPE_B: |
| 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; |
| } |
| av_dlog(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); |
| } |
| } |
| |
| if (s->codec_id == AV_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; i < mb_block_count; i++) { |
| if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0) |
| return -1; |
| } |
| } |
| } 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) { |
| av_assert2(mb_type & MB_TYPE_CBP); |
| |
| s->mv_dir = MV_DIR_FORWARD; |
| if (s->picture_structure == PICT_FRAME) { |
| if (s->picture_structure == PICT_FRAME |
| && !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 { |
| av_assert2(mb_type & MB_TYPE_L0L1); |
| // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED |
| /* get additional motion vector type */ |
| if (s->picture_structure == PICT_FRAME && 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; |
| av_dlog(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; |
| av_dlog(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; |
| av_dlog(s->avctx, "fmy=%d\n", val); |
| } |
| } |
| } |
| } else { |
| av_assert0(!s->progressive_sequence); |
| 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: |
| if(s->progressive_sequence){ |
| av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n"); |
| return -1; |
| } |
| s->mv_type = MV_TYPE_DMV; |
| for (i = 0; i < 2; i++) { |
| if (USES_LIST(mb_type, i)) { |
| int dmx, dmy, mx, my, m; |
| const int my_shift = s->picture_structure == PICT_FRAME; |
| |
| 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] >> my_shift); |
| dmy = get_dmv(s); |
| |
| |
| s->last_mv[i][0][1] = my << my_shift; |
| s->last_mv[i][1][1] = my << my_shift; |
| |
| 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 %d at %d %d\n", cbp, 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 == AV_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; i < mb_block_count; i++) { |
| if (cbp & (1 << 11)) { |
| if (mpeg2_decode_block_non_intra(s, *s->pblocks[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.f.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type; |
| |
| return 0; |
| } |
| |
| 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; |
| |
| ff_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 == AV_CODEC_ID_MPEG1VIDEO) |
| avctx->chroma_sample_location = AVCHROMA_LOC_CENTER; |
| else |
| avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; |
| return 0; |
| } |
| |
| static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from) |
| { |
| Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data; |
| MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx; |
| int err; |
| |
| if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized) |
| return 0; |
| |
| err = ff_mpeg_update_thread_context(avctx, avctx_from); |
| if (err) return err; |
| |
| if (!ctx->mpeg_enc_ctx_allocated) |
| memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext)); |
| |
| if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay)) |
| s->picture_number++; |
| |
| 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 const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = { |
| #if CONFIG_MPEG_XVMC_DECODER |
| AV_PIX_FMT_XVMC_MPEG2_IDCT, |
| AV_PIX_FMT_XVMC_MPEG2_MC, |
| #endif |
| #if CONFIG_MPEG1_VDPAU_HWACCEL |
| AV_PIX_FMT_VDPAU_MPEG1, |
| #endif |
| AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_NONE |
| }; |
| |
| static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = { |
| #if CONFIG_MPEG_XVMC_DECODER |
| AV_PIX_FMT_XVMC_MPEG2_IDCT, |
| AV_PIX_FMT_XVMC_MPEG2_MC, |
| #endif |
| #if CONFIG_MPEG2_VDPAU_HWACCEL |
| AV_PIX_FMT_VDPAU_MPEG2, |
| #endif |
| #if CONFIG_MPEG2_DXVA2_HWACCEL |
| AV_PIX_FMT_DXVA2_VLD, |
| #endif |
| #if CONFIG_MPEG2_VAAPI_HWACCEL |
| AV_PIX_FMT_VAAPI_VLD, |
| #endif |
| AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_NONE |
| }; |
| |
| static inline int uses_vdpau(AVCodecContext *avctx) { |
| return avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG1 || avctx->pix_fmt == AV_PIX_FMT_VDPAU_MPEG2; |
| } |
| |
| static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx) |
| { |
| Mpeg1Context *s1 = avctx->priv_data; |
| MpegEncContext *s = &s1->mpeg_enc_ctx; |
| |
| if(s->chroma_format < 2) { |
| enum AVPixelFormat res; |
| res = avctx->get_format(avctx, |
| avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ? |
| mpeg1_hwaccel_pixfmt_list_420 : |
| mpeg2_hwaccel_pixfmt_list_420); |
| if (res != AV_PIX_FMT_XVMC_MPEG2_IDCT && res != AV_PIX_FMT_XVMC_MPEG2_MC) { |
| avctx->xvmc_acceleration = 0; |
| } else if (!avctx->xvmc_acceleration) { |
| avctx->xvmc_acceleration = 2; |
| } |
| return res; |
| } else if(s->chroma_format == 2) |
| return AV_PIX_FMT_YUV422P; |
| else |
| return AV_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; |
| ff_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); |
| if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->bit_rate) { |
| avctx->rc_max_rate = s->bit_rate; |
| } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s->bit_rate && |
| (s->bit_rate != 0x3FFFF*400 || s->vbv_delay != 0xFFFF)) { |
| 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; |
| |
| if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) { |
| //MPEG-1 fps |
| avctx->time_base.den = ff_mpeg12_frame_rate_tab[s->frame_rate_index].num; |
| avctx->time_base.num = ff_mpeg12_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_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2, |
| ff_mpeg12_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) { |
| AVRational dar = |
| av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info], |
| (AVRational) {s1->pan_scan.width, s1->pan_scan.height}), |
| (AVRational) {s->width, s->height}); |
| |
| // we ignore the spec here and guess a bit as reality does not match the spec, see for example |
| // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg |
| // issue1613, 621, 562 |
| if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) || |
| (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) { |
| 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}); |
| //issue1613 4/3 16/9 -> 16/9 |
| //res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3 |
| //widescreen-issue562.mpg 4/3 16/9 -> 16/9 |
| // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height}); |
| av_dlog(avctx, "A %d/%d\n", |
| ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den); |
| av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num, |
| s->avctx->sample_aspect_ratio.den); |
| } |
| } 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 == AV_PIX_FMT_XVMC_MPEG2_IDCT || |
| avctx->hwaccel ) |
| 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 (ff_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; |
| } |
| |
| 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); |
| s->vbv_delay = vbv_delay; |
| if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) { |
| s->full_pel[0] = get_bits1(&s->gb); |
| f_code = get_bits(&s->gb, 3); |
| if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT))) |
| return -1; |
| f_code += !f_code; |
| s->mpeg_f_code[0][0] = f_code; |
| s->mpeg_f_code[0][1] = f_code; |
| } |
| if (s->pict_type == AV_PICTURE_TYPE_B) { |
| s->full_pel[1] = get_bits1(&s->gb); |
| f_code = get_bits(&s->gb, 3); |
| if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT))) |
| return -1; |
| f_code += !f_code; |
| s->mpeg_f_code[1][0] = f_code; |
| s->mpeg_f_code[1][1] = f_code; |
| } |
| s->current_picture.f.pict_type = s->pict_type; |
| s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I; |
| |
| 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; |
| |
| av_dlog(s->avctx, "sequence extension\n"); |
| s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO; |
| |
| 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); |
| // remaining 3 bits are zero padding |
| |
| 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; i < nofco; i++) { |
| s1->pan_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_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v); |
| 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) |
| { |
| av_dlog(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 = AV_PICTURE_TYPE_I; |
| else |
| s->pict_type = AV_PICTURE_TYPE_P; |
| } else |
| s->pict_type = AV_PICTURE_TYPE_B; |
| s->current_picture.f.pict_type = s->pict_type; |
| s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I; |
| } |
| s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0]; |
| s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1]; |
| s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0]; |
| s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1]; |
| |
| 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->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 */ |
| av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision); |
| av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure); |
| av_dlog(s->avctx, "top field first=%d\n", s->top_field_first); |
| av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field); |
| av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors); |
| av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format); |
| av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan); |
| av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct); |
| av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame); |
| } |
| |
| 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 (ff_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->f.repeat_pict = 0; |
| if (s->repeat_first_field) { |
| if (s->progressive_sequence) { |
| if (s->top_field_first) |
| s->current_picture_ptr->f.repeat_pict = 4; |
| else |
| s->current_picture_ptr->f.repeat_pict = 2; |
| } else if (s->progressive_frame) { |
| s->current_picture_ptr->f.repeat_pict = 1; |
| } |
| } |
| |
| *s->current_picture_ptr->f.pan_scan = s1->pan_scan; |
| |
| if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME)) |
| ff_thread_finish_setup(avctx); |
| } else { // second field |
| int i; |
| |
| if (!s->current_picture_ptr) { |
| av_log(s->avctx, AV_LOG_ERROR, "first field missing\n"); |
| return -1; |
| } |
| |
| if (s->avctx->hwaccel && |
| (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) { |
| if (s->avctx->hwaccel->end_frame(s->avctx) < 0) |
| av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode first field\n"); |
| } |
| |
| for (i = 0; i < 4; i++) { |
| s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i]; |
| if (s->picture_structure == PICT_BOTTOM_FIELD) { |
| s->current_picture.f.data[i] += s->current_picture_ptr->f.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 |
| |
| /** |
| * Decode 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(MpegEncContext *s, int mb_y, |
| const uint8_t **buf, int buf_size) |
| { |
| AVCodecContext *avctx = s->avctx; |
| const int lowres = s->avctx->lowres; |
| const int field_pic = s->picture_structure != PICT_FRAME; |
| |
| s->resync_mb_x = |
| s->resync_mb_y = -1; |
| |
| av_assert0(mb_y < s->mb_height); |
| |
| init_get_bits(&s->gb, *buf, buf_size * 8); |
| if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16) |
| skip_bits(&s->gb, 3); |
| |
| 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; |
| |
| if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) { |
| skip_bits1(&s->gb); |
| } else { |
| while (get_bits_left(&s->gb) > 0) { |
| 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 = avpriv_mpv_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 == AV_PICTURE_TYPE_I ? "I" : (s->pict_type == AV_PICTURE_TYPE_P ? "P" : (s->pict_type == AV_PICTURE_TYPE_B ? "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.f.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs |
| const int wrap = s->b8_stride; |
| int xy = s->mb_x * 2 + s->mb_y * 2 * wrap; |
| int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride); |
| int motion_x, motion_y, dir, i; |
| |
| for (i = 0; i < 2; i++) { |
| for (dir = 0; dir < 2; dir++) { |
| if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) { |
| 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.f.motion_val[dir][xy ][0] = motion_x; |
| s->current_picture.f.motion_val[dir][xy ][1] = motion_y; |
| s->current_picture.f.motion_val[dir][xy + 1][0] = motion_x; |
| s->current_picture.f.motion_val[dir][xy + 1][1] = motion_y; |
| s->current_picture.f.ref_index [dir][b8_xy ] = |
| s->current_picture.f.ref_index [dir][b8_xy + 1] = s->field_select[dir][i]; |
| av_assert2(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1); |
| } |
| xy += wrap; |
| b8_xy +=2; |
| } |
| } |
| |
| s->dest[0] += 16 >> lowres; |
| s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift; |
| s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift; |
| |
| ff_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 >> field_pic), mb_size); |
| ff_MPV_report_decode_progress(s); |
| |
| s->mb_x = 0; |
| s->mb_y += 1 << field_pic; |
| |
| if (s->mb_y >= s->mb_height) { |
| int left = get_bits_left(&s->gb); |
| int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && 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->err_recognition & (AV_EF_BITSTREAM | AV_EF_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 == AV_PICTURE_TYPE_I) { |
| 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 == AV_PICTURE_TYPE_P) { |
| /* 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; |
| av_dlog(s, "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; |
| const int field_pic = s->picture_structure != PICT_FRAME; |
| |
| s->error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic; |
| |
| for (;;) { |
| uint32_t start_code; |
| int ret; |
| |
| ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf); |
| emms_c(); |
| av_dlog(c, "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 (c->err_recognition & AV_EF_EXPLODE) |
| return ret; |
| 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, ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR); |
| } else { |
| ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_AC_END | ER_DC_END | ER_MV_END); |
| } |
| |
| if (s->mb_y == s->end_mb_y) |
| return 0; |
| |
| start_code = -1; |
| buf = avpriv_mpv_find_start_code(buf, s->gb.buffer_end, &start_code); |
| mb_y= start_code - SLICE_MIN_START_CODE; |
| if(s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16) |
| mb_y += (*buf&0xE0)<<2; |
| mb_y <<= field_pic; |
| if (s->picture_structure == PICT_BOTTOM_FIELD) |
| mb_y++; |
| if (mb_y < 0 || mb_y >= s->end_mb_y) |
| return -1; |
| } |
| } |
| |
| /** |
| * Handle 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 << field_pic == s->mb_height &&*/ !s->first_field && !s->first_slice) { |
| /* end of image */ |
| |
| s->current_picture_ptr->f.qscale_type = FF_QSCALE_TYPE_MPEG2; |
| |
| ff_er_frame_end(s); |
| |
| ff_MPV_frame_end(s); |
| |
| if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) { |
| *pict = s->current_picture_ptr->f; |
| ff_print_debug_info(s, pict); |
| } else { |
| if (avctx->active_thread_type & FF_THREAD_FRAME) |
| 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 = s->last_picture_ptr->f; |
| 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->err_recognition & (AV_EF_BITSTREAM | AV_EF_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->first_field = 0; |
| s->frame_pred_frame_dct = 1; |
| s->chroma_format = 1; |
| s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO; |
| 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) { |
| ff_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 == AV_PIX_FMT_XVMC_MPEG2_IDCT || avctx->hwaccel ) |
| if (avctx->idct_algo == FF_IDCT_AUTO) |
| avctx->idct_algo = FF_IDCT_SIMPLE; |
| |
| if (ff_MPV_common_init(s) < 0) |
| return -1; |
| 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->first_field = 0; |
| s->frame_pred_frame_dct = 1; |
| s->chroma_format = 1; |
| if (s->codec_tag == AV_RL32("BW10")) { |
| s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO; |
| } else { |
| 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 |
| s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO; |
| } |
| s1->save_width = s->width; |
| s1->save_height = s->height; |
| s1->save_progressive_seq = s->progressive_sequence; |
| return 0; |
| } |
| |
| |
| static void mpeg_decode_user_data(AVCodecContext *avctx, |
| const uint8_t *p, int buf_size) |
| { |
| Mpeg1Context *s = avctx->priv_data; |
| const uint8_t *buf_end = p + buf_size; |
| |
| if(buf_size > 29){ |
| int i; |
| for(i=0; i<20; i++) |
| if(!memcmp(p+i, "\0TMPGEXS\0", 9)){ |
| s->tmpgexs= 1; |
| } |
| |
| /* for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){ |
| av_log(avctx, AV_LOG_ERROR, "%c", p[i]); |
| } |
| av_log(avctx, AV_LOG_ERROR, "\n");*/ |
| } |
| |
| /* 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 broken_link; |
| int64_t tc; |
| |
| init_get_bits(&s->gb, buf, buf_size*8); |
| |
| tc = avctx->timecode_frame_start = get_bits(&s->gb, 25); |
| |
| 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) { |
| char tcbuf[AV_TIMECODE_STR_SIZE]; |
| av_timecode_make_mpeg_tc_string(tcbuf, tc); |
| av_log(s->avctx, AV_LOG_DEBUG, |
| "GOP (%s) closed_gop=%d broken_link=%d\n", |
| tcbuf, s->closed_gop, broken_link); |
| } |
| } |
| /** |
| * 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; |
| 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; i < buf_size; i++) { |
| av_assert1(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 { |
| i = avpriv_mpv_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->frame_start_found = 0; |
| 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 (pc->frame_start_found == 0 && 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 *got_output, |
| 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 = avpriv_mpv_find_start_code(buf_ptr, buf_end, &start_code); |
| if (start_code > 0x1ff) { |
| if (s2->pict_type != AV_PICTURE_TYPE_B || avctx->skip_frame <= AVDISCARD_DEFAULT) { |
| if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) { |
| int i; |
| av_assert0(avctx->thread_count > 1); |
| |
| avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*)); |
| for (i = 0; i < s->slice_count; i++) |
| s2->error_count += s2->thread_context[i]->error_count; |
| } |
| |
| if (CONFIG_VDPAU && uses_vdpau(avctx)) |
| 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 |
| *got_output = 1; |
| } |
| } |
| 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); |
| if(buf != avctx->extradata) |
| s->sync=1; |
| } else { |
| av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code); |
| if (avctx->err_recognition & AV_EF_EXPLODE) |
| return AVERROR_INVALIDDATA; |
| } |
| break; |
| |
| case PICTURE_START_CODE: |
| if(s->tmpgexs){ |
| s2->intra_dc_precision= 3; |
| s2->intra_matrix[0]= 1; |
| } |
| if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) && s->slice_count) { |
| int i; |
| |
| avctx->execute(avctx, slice_decode_thread, |
| s2->thread_context, NULL, |
| s->slice_count, sizeof(void*)); |
| for (i = 0; i < s->slice_count; i++) |
| s2->error_count += s2->thread_context[i]->error_count; |
| s->slice_count = 0; |
| } |
| if (last_code == 0 || last_code == SLICE_MIN_START_CODE) { |
| ret = mpeg_decode_postinit(avctx); |
| if (ret < 0) { |
| av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n"); |
| return ret; |
| } |
| |
| /* 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); |
| if (avctx->err_recognition & AV_EF_EXPLODE) |
| return AVERROR_INVALIDDATA; |
| } |
| 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); |
| if (avctx->err_recognition & AV_EF_EXPLODE) |
| return AVERROR_INVALIDDATA; |
| } |
| 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); |
| if (avctx->err_recognition & AV_EF_EXPLODE) |
| return AVERROR_INVALIDDATA; |
| } |
| 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); |
| s->sync=1; |
| } else { |
| av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code); |
| if (avctx->err_recognition & AV_EF_EXPLODE) |
| return AVERROR_INVALIDDATA; |
| } |
| break; |
| default: |
| if (start_code >= SLICE_MIN_START_CODE && |
| start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) { |
| |
| if (s2->progressive_sequence && !s2->progressive_frame) { |
| s2->progressive_frame = 1; |
| av_log(s2->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n"); |
| } |
| |
| if (s2->picture_structure == 0 || (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) { |
| av_log(s2->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s2->picture_structure); |
| s2->picture_structure = PICT_FRAME; |
| } |
| |
| if (s2->progressive_sequence && !s2->frame_pred_frame_dct) { |
| av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n"); |
| } |
| |
| if (s2->picture_structure == PICT_FRAME) { |
| s2->first_field = 0; |
| s2->v_edge_pos = 16 * s2->mb_height; |
| } else { |
| s2->first_field ^= 1; |
| s2->v_edge_pos = 8 * s2->mb_height; |
| memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height); |
| } |
| } |
| if (start_code >= SLICE_MIN_START_CODE && |
| start_code <= SLICE_MAX_START_CODE && last_code != 0) { |
| const int field_pic = s2->picture_structure != PICT_FRAME; |
| int mb_y = start_code - SLICE_MIN_START_CODE; |
| last_code = SLICE_MIN_START_CODE; |
| if(s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16) |
| mb_y += (*buf_ptr&0xE0)<<2; |
| |
| mb_y <<= field_pic; |
| if (s2->picture_structure == PICT_BOTTOM_FIELD) |
| mb_y++; |
| |
| if (mb_y >= s2->mb_height) { |
| av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height); |
| return -1; |
| } |
| |
| 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 == AV_PICTURE_TYPE_B) { |
| if (!s2->closed_gop) |
| break; |
| } |
| } |
| if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->flags2 & CODEC_FLAG2_SHOW_ALL)) |
| s->sync=1; |
| 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 == AV_PICTURE_TYPE_P && !s->sync) break; |
| } |
| if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) || |
| (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) || |
| avctx->skip_frame >= AVDISCARD_ALL) |
| break; |
| |
| if (!s->mpeg_enc_ctx_allocated) |
| break; |
| |
| if (s2->codec_id == AV_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"); |
| if (avctx->err_recognition & AV_EF_EXPLODE) |
| return AVERROR_INVALIDDATA; |
| 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 AVERROR_INVALIDDATA; |
| } |
| |
| if (uses_vdpau(avctx)) { |
| s->slice_count++; |
| break; |
| } |
| |
| if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) { |
| int threshold = (s2->mb_height * s->slice_count + |
| s2->slice_context_count / 2) / |
| s2->slice_context_count; |
| av_assert0(avctx->thread_count > 1); |
| 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; |
| ret = ff_update_duplicate_context(thread_context, |
| s2); |
| if (ret < 0) |
| return ret; |
| } |
| 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(s2, mb_y, &buf_ptr, input_size); |
| emms_c(); |
| |
| if (ret < 0) { |
| if (avctx->err_recognition & AV_EF_EXPLODE) |
| return ret; |
| 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, ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR); |
| } else { |
| ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x-1, s2->mb_y, ER_AC_END | ER_DC_END | ER_MV_END); |
| } |
| } |
| } |
| break; |
| } |
| } |
| } |
| |
| static int mpeg_decode_frame(AVCodecContext *avctx, |
| void *data, int *got_output, |
| AVPacket *avpkt) |
| { |
| const uint8_t *buf = avpkt->data; |
| int ret; |
| int buf_size = avpkt->size; |
| Mpeg1Context *s = avctx->priv_data; |
| AVFrame *picture = data; |
| MpegEncContext *s2 = &s->mpeg_enc_ctx; |
| av_dlog(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 = s2->next_picture_ptr->f; |
| s2->next_picture_ptr = NULL; |
| |
| *got_output = 1; |
| } |
| 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; |
| } |
| |
| s2->codec_tag = avpriv_toupper4(avctx->codec_tag); |
| if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2") |
| || s2->codec_tag == AV_RL32("BW10") |
| )) |
| vcr2_init_sequence(avctx); |
| |
| s->slice_count = 0; |
| |
| if (avctx->extradata && !s->extradata_decoded) { |
| ret = decode_chunks(avctx, picture, got_output, avctx->extradata, avctx->extradata_size); |
| if(*got_output) { |
| av_log(avctx, AV_LOG_ERROR, "picture in extradata\n"); |
| *got_output = 0; |
| } |
| s->extradata_decoded = 1; |
| if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) { |
| s2->current_picture_ptr = NULL; |
| return ret; |
| } |
| } |
| |
| ret = decode_chunks(avctx, picture, got_output, buf, buf_size); |
| if (ret<0 || *got_output) |
| s2->current_picture_ptr = NULL; |
| |
| return ret; |
| } |
| |
| |
| static void flush(AVCodecContext *avctx) |
| { |
| Mpeg1Context *s = avctx->priv_data; |
| |
| s->sync=0; |
| |
| ff_mpeg_flush(avctx); |
| } |
| |
| static int mpeg_decode_end(AVCodecContext *avctx) |
| { |
| Mpeg1Context *s = avctx->priv_data; |
| |
| if (s->mpeg_enc_ctx_allocated) |
| ff_MPV_common_end(&s->mpeg_enc_ctx); |
| return 0; |
| } |
| |
| static const AVProfile mpeg2_video_profiles[] = { |
| { FF_PROFILE_MPEG2_422, "4:2:2" }, |
| { FF_PROFILE_MPEG2_HIGH, "High" }, |
| { FF_PROFILE_MPEG2_SS, "Spatially Scalable" }, |
| { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" }, |
| { FF_PROFILE_MPEG2_MAIN, "Main" }, |
| { FF_PROFILE_MPEG2_SIMPLE, "Simple" }, |
| { FF_PROFILE_RESERVED, "Reserved" }, |
| { FF_PROFILE_RESERVED, "Reserved" }, |
| { FF_PROFILE_UNKNOWN }, |
| }; |
| |
| |
| AVCodec ff_mpeg1video_decoder = { |
| .name = "mpeg1video", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_MPEG1VIDEO, |
| .priv_data_size = sizeof(Mpeg1Context), |
| .init = mpeg_decode_init, |
| .close = mpeg_decode_end, |
| .decode = mpeg_decode_frame, |
| .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | |
| CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | |
| CODEC_CAP_SLICE_THREADS, |
| .flush = flush, |
| .max_lowres = 3, |
| .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"), |
| .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context) |
| }; |
| |
| AVCodec ff_mpeg2video_decoder = { |
| .name = "mpeg2video", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_MPEG2VIDEO, |
| .priv_data_size = sizeof(Mpeg1Context), |
| .init = mpeg_decode_init, |
| .close = mpeg_decode_end, |
| .decode = mpeg_decode_frame, |
| .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | |
| CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | |
| CODEC_CAP_SLICE_THREADS, |
| .flush = flush, |
| .max_lowres = 3, |
| .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"), |
| .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles), |
| }; |
| |
| //legacy decoder |
| AVCodec ff_mpegvideo_decoder = { |
| .name = "mpegvideo", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_MPEG2VIDEO, |
| .priv_data_size = sizeof(Mpeg1Context), |
| .init = mpeg_decode_init, |
| .close = mpeg_decode_end, |
| .decode = mpeg_decode_frame, |
| .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS, |
| .flush = flush, |
| .max_lowres = 3, |
| .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->active_thread_type & FF_THREAD_SLICE) |
| return -1; |
| if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER)) |
| return -1; |
| if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) { |
| av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n"); |
| } |
| mpeg_decode_init(avctx); |
| |
| avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT; |
| avctx->xvmc_acceleration = 2; // 2 - the blocks are packed! |
| |
| return 0; |
| } |
| |
| AVCodec ff_mpeg_xvmc_decoder = { |
| .name = "mpegvideo_xvmc", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_MPEG2VIDEO_XVMC, |
| .priv_data_size = sizeof(Mpeg1Context), |
| .init = mpeg_mc_decode_init, |
| .close = mpeg_decode_end, |
| .decode = mpeg_decode_frame, |
| .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | |
| CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY, |
| .flush = flush, |
| .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"), |
| }; |
| |
| #endif |
| |
| #if CONFIG_MPEG_VDPAU_DECODER |
| AVCodec ff_mpeg_vdpau_decoder = { |
| .name = "mpegvideo_vdpau", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_MPEG2VIDEO, |
| .priv_data_size = sizeof(Mpeg1Context), |
| .init = mpeg_decode_init, |
| .close = mpeg_decode_end, |
| .decode = mpeg_decode_frame, |
| .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | |
| CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY, |
| .flush = flush, |
| .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"), |
| }; |
| #endif |
| |
| #if CONFIG_MPEG1_VDPAU_DECODER |
| AVCodec ff_mpeg1_vdpau_decoder = { |
| .name = "mpeg1video_vdpau", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_MPEG1VIDEO, |
| .priv_data_size = sizeof(Mpeg1Context), |
| .init = mpeg_decode_init, |
| .close = mpeg_decode_end, |
| .decode = mpeg_decode_frame, |
| .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | |
| CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY, |
| .flush = flush, |
| .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"), |
| }; |
| #endif |