2767 lines
100 KiB
C
2767 lines
100 KiB
C
/*
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* MPEG-1/2 decoder
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* Copyright (c) 2000, 2001 Fabrice Bellard
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* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* MPEG-1/2 decoder
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*/
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#define UNCHECKED_BITSTREAM_READER 1
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//#define DEBUG
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#include "libavutil/avassert.h"
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#include "libavutil/timecode.h"
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#include "internal.h"
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#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
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#include "error_resilience.h"
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#include "mpeg12.h"
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#include "mpeg12data.h"
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#include "mpeg12decdata.h"
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#include "bytestream.h"
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#include "vdpau_internal.h"
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#include "xvmc_internal.h"
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#include "thread.h"
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#define MV_VLC_BITS 9
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#define MBINCR_VLC_BITS 9
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#define MB_PAT_VLC_BITS 9
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#define MB_PTYPE_VLC_BITS 6
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#define MB_BTYPE_VLC_BITS 6
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static VLC mv_vlc;
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/* as H.263, but only 17 codes */
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static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
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{
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int code, sign, val, shift;
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code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
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if (code == 0) {
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return pred;
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}
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if (code < 0) {
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return 0xffff;
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}
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sign = get_bits1(&s->gb);
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shift = fcode - 1;
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val = code;
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if (shift) {
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val = (val - 1) << shift;
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val |= get_bits(&s->gb, shift);
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val++;
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}
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if (sign)
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val = -val;
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val += pred;
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/* modulo decoding */
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return sign_extend(val, 5 + shift);
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}
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static inline int mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
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{
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int level, dc, diff, i, j, run;
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int component;
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RLTable *rl = &ff_rl_mpeg1;
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uint8_t * const scantable = s->intra_scantable.permutated;
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const uint16_t *quant_matrix = s->intra_matrix;
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const int qscale = s->qscale;
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/* DC coefficient */
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component = (n <= 3 ? 0 : n - 4 + 1);
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diff = decode_dc(&s->gb, component);
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if (diff >= 0xffff)
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return -1;
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dc = s->last_dc[component];
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dc += diff;
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s->last_dc[component] = dc;
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block[0] = dc * quant_matrix[0];
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av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
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i = 0;
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{
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OPEN_READER(re, &s->gb);
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/* now quantify & encode AC coefficients */
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for (;;) {
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UPDATE_CACHE(re, &s->gb);
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GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
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if (level == 127) {
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break;
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} else if (level != 0) {
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i += run;
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j = scantable[i];
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level = (level * qscale * quant_matrix[j]) >> 4;
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level = (level - 1) | 1;
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level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
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LAST_SKIP_BITS(re, &s->gb, 1);
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} else {
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/* escape */
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run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
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UPDATE_CACHE(re, &s->gb);
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level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
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if (level == -128) {
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level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
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} else if (level == 0) {
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level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
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}
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i += run;
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j = scantable[i];
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if (level < 0) {
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level = -level;
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level = (level * qscale * quant_matrix[j]) >> 4;
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level = (level - 1) | 1;
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level = -level;
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} else {
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level = (level * qscale * quant_matrix[j]) >> 4;
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level = (level - 1) | 1;
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}
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}
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if (i > 63) {
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av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
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return -1;
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}
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block[j] = level;
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}
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CLOSE_READER(re, &s->gb);
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}
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s->block_last_index[n] = i;
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return 0;
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}
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int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
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{
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return mpeg1_decode_block_intra(s, block, n);
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}
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static inline int mpeg1_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
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{
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int level, i, j, run;
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RLTable *rl = &ff_rl_mpeg1;
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uint8_t * const scantable = s->intra_scantable.permutated;
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const uint16_t *quant_matrix = s->inter_matrix;
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const int qscale = s->qscale;
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{
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OPEN_READER(re, &s->gb);
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i = -1;
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// special case for first coefficient, no need to add second VLC table
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UPDATE_CACHE(re, &s->gb);
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if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
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level = (3 * qscale * quant_matrix[0]) >> 5;
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level = (level - 1) | 1;
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if (GET_CACHE(re, &s->gb) & 0x40000000)
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level = -level;
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block[0] = level;
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i++;
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SKIP_BITS(re, &s->gb, 2);
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if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
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goto end;
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}
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/* now quantify & encode AC coefficients */
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for (;;) {
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GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
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if (level != 0) {
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i += run;
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j = scantable[i];
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level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
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level = (level - 1) | 1;
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level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
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SKIP_BITS(re, &s->gb, 1);
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} else {
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/* escape */
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run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
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UPDATE_CACHE(re, &s->gb);
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level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
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if (level == -128) {
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level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
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} else if (level == 0) {
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level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
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}
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i += run;
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j = scantable[i];
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if (level < 0) {
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level = -level;
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level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
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level = (level - 1) | 1;
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level = -level;
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} else {
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level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
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level = (level - 1) | 1;
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}
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}
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if (i > 63) {
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av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
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return -1;
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}
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block[j] = level;
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if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
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break;
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UPDATE_CACHE(re, &s->gb);
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}
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end:
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LAST_SKIP_BITS(re, &s->gb, 2);
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CLOSE_READER(re, &s->gb);
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}
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s->block_last_index[n] = i;
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return 0;
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}
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/**
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* Note: this function can read out of range and crash for corrupt streams.
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* Changing this would eat up any speed benefits it has.
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* Do not use "fast" flag if you need the code to be robust.
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*/
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static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
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{
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int level, i, j, run;
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RLTable *rl = &ff_rl_mpeg1;
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uint8_t * const scantable = s->intra_scantable.permutated;
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const int qscale = s->qscale;
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{
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OPEN_READER(re, &s->gb);
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i = -1;
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// special case for first coefficient, no need to add second VLC table
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UPDATE_CACHE(re, &s->gb);
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if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
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level = (3 * qscale) >> 1;
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level = (level - 1) | 1;
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if (GET_CACHE(re, &s->gb) & 0x40000000)
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level = -level;
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block[0] = level;
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i++;
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SKIP_BITS(re, &s->gb, 2);
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if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
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goto end;
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}
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/* now quantify & encode AC coefficients */
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for (;;) {
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GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
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if (level != 0) {
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i += run;
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j = scantable[i];
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level = ((level * 2 + 1) * qscale) >> 1;
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level = (level - 1) | 1;
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level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
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SKIP_BITS(re, &s->gb, 1);
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} else {
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/* escape */
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run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
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UPDATE_CACHE(re, &s->gb);
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level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
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if (level == -128) {
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level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
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} else if (level == 0) {
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level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
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}
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i += run;
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j = scantable[i];
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if (level < 0) {
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level = -level;
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level = ((level * 2 + 1) * qscale) >> 1;
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level = (level - 1) | 1;
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level = -level;
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} else {
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level = ((level * 2 + 1) * qscale) >> 1;
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level = (level - 1) | 1;
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}
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}
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block[j] = level;
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if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
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break;
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UPDATE_CACHE(re, &s->gb);
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}
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end:
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LAST_SKIP_BITS(re, &s->gb, 2);
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CLOSE_READER(re, &s->gb);
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}
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s->block_last_index[n] = i;
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return 0;
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}
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static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
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{
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int level, i, j, run;
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RLTable *rl = &ff_rl_mpeg1;
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uint8_t * const scantable = s->intra_scantable.permutated;
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const uint16_t *quant_matrix;
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const int qscale = s->qscale;
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int mismatch;
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mismatch = 1;
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{
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OPEN_READER(re, &s->gb);
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i = -1;
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if (n < 4)
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quant_matrix = s->inter_matrix;
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else
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quant_matrix = s->chroma_inter_matrix;
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// special case for first coefficient, no need to add second VLC table
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UPDATE_CACHE(re, &s->gb);
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if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
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level= (3 * qscale * quant_matrix[0]) >> 5;
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if (GET_CACHE(re, &s->gb) & 0x40000000)
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level = -level;
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block[0] = level;
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mismatch ^= level;
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i++;
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SKIP_BITS(re, &s->gb, 2);
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if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
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goto end;
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}
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/* now quantify & encode AC coefficients */
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for (;;) {
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GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
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if (level != 0) {
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i += run;
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j = scantable[i];
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level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
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level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
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SKIP_BITS(re, &s->gb, 1);
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} else {
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/* escape */
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run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
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UPDATE_CACHE(re, &s->gb);
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level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
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i += run;
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j = scantable[i];
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if (level < 0) {
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level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
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level = -level;
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} else {
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level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
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}
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}
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if (i > 63) {
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av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
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return -1;
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}
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mismatch ^= level;
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block[j] = level;
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if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
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break;
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UPDATE_CACHE(re, &s->gb);
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}
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end:
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LAST_SKIP_BITS(re, &s->gb, 2);
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CLOSE_READER(re, &s->gb);
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}
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block[63] ^= (mismatch & 1);
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s->block_last_index[n] = i;
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return 0;
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}
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|
|
|
/**
|
|
* 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,
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int16_t *block, int n)
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{
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int level, i, j, run;
|
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RLTable *rl = &ff_rl_mpeg1;
|
|
uint8_t * const scantable = s->intra_scantable.permutated;
|
|
const int qscale = s->qscale;
|
|
OPEN_READER(re, &s->gb);
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i = -1;
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|
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// 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) {
|
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level = (3 * qscale) >> 1;
|
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if (GET_CACHE(re, &s->gb) & 0x40000000)
|
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level = -level;
|
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block[0] = level;
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i++;
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SKIP_BITS(re, &s->gb, 2);
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if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
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goto end;
|
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}
|
|
|
|
/* now quantify & encode AC coefficients */
|
|
for (;;) {
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GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
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|
|
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if (level != 0) {
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i += run;
|
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j = scantable[i];
|
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level = ((level * 2 + 1) * qscale) >> 1;
|
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level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
|
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SKIP_BITS(re, &s->gb, 1);
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} else {
|
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/* escape */
|
|
run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
|
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UPDATE_CACHE(re, &s->gb);
|
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level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
|
|
|
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i += run;
|
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j = scantable[i];
|
|
if (level < 0) {
|
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level = ((-level * 2 + 1) * qscale) >> 1;
|
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level = -level;
|
|
} else {
|
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level = ((level * 2 + 1) * qscale) >> 1;
|
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}
|
|
}
|
|
|
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block[j] = level;
|
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if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
|
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break;
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UPDATE_CACHE(re, &s->gb);
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}
|
|
end:
|
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LAST_SKIP_BITS(re, &s->gb, 2);
|
|
CLOSE_READER(re, &s->gb);
|
|
s->block_last_index[n] = i;
|
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return 0;
|
|
}
|
|
|
|
|
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static inline int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *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, int16_t *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)
|
|
{
|
|
int16_t (*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, int16_t 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.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)) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
|
|
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;
|
|
}
|
|
|
|
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.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 || uses_vdpau(avctx))
|
|
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) {
|
|
AVFrameSideData *pan_scan;
|
|
|
|
if (ff_MPV_frame_start(s, avctx) < 0)
|
|
return -1;
|
|
|
|
ff_mpeg_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;
|
|
}
|
|
}
|
|
|
|
pan_scan = av_frame_new_side_data(&s->current_picture_ptr->f,
|
|
AV_FRAME_DATA_PANSCAN,
|
|
sizeof(s1->pan_scan));
|
|
if (!pan_scan)
|
|
return AVERROR(ENOMEM);
|
|
memcpy(pan_scan->data, &s1->pan_scan, sizeof(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.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.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][b8_xy ] =
|
|
s->current_picture.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_mpeg_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 >= 32 && !is_d10) {
|
|
GetBitContext gb = s->gb;
|
|
align_get_bits(&gb);
|
|
if (show_bits(&gb, 24) == 0x060E2B) {
|
|
av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
|
|
is_d10 = 1;
|
|
}
|
|
}
|
|
|
|
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->er.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->er.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->er, 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->er, 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 */
|
|
|
|
ff_er_frame_end(&s->er);
|
|
|
|
ff_MPV_frame_end(s);
|
|
|
|
if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
|
|
int ret = av_frame_ref(pict, &s->current_picture_ptr->f);
|
|
if (ret < 0)
|
|
return ret;
|
|
ff_print_debug_info(s, s->current_picture_ptr, 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) {
|
|
int ret = av_frame_ref(pict, &s->last_picture_ptr->f);
|
|
if (ret < 0)
|
|
return ret;
|
|
ff_print_debug_info(s, s->last_picture_ptr, 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);
|
|
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 || uses_vdpau(avctx))
|
|
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;
|
|
int picture_start_code_seen = 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->er.error_count += s2->thread_context[i]->er.error_count;
|
|
}
|
|
|
|
if (CONFIG_VDPAU && uses_vdpau(avctx))
|
|
ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count);
|
|
|
|
ret = slice_end(avctx, picture);
|
|
if (ret < 0)
|
|
return ret;
|
|
else if (ret) {
|
|
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 (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
|
|
/* If it's a frame picture, there can't be more than one picture header.
|
|
Yet, it does happen and we need to handle it. */
|
|
av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
|
|
break;
|
|
}
|
|
picture_start_code_seen = 1;
|
|
|
|
if (s2->width <= 0 || s2->height <= 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "%dx%d is invalid\n", s2->width, s2->height);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
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->er.error_count += s2->thread_context[i]->er.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->er, 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->er, 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) {
|
|
int ret = av_frame_ref(picture, &s2->next_picture_ptr->f);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
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
|