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authorMichael Niedermayer <michaelni@gmx.at>2013-03-28 11:45:04 +0100
committerMichael Niedermayer <michaelni@gmx.at>2013-03-28 11:45:50 +0100
commit016c00cf68a481000f48ece6c11f622ba65e8045 (patch)
tree3024981d4018459edd50878c4bfce934b02d1aac /libavcodec/mpeg12dec.c
parent385ffc7650d2661b651f466f18045c2edc30b11a (diff)
parent1b6d66745ac1768adb387c2227cdcf4452271149 (diff)
downloadffmpeg-016c00cf68a481000f48ece6c11f622ba65e8045.tar.gz
Merge commit '1b6d66745ac1768adb387c2227cdcf4452271149'
* commit '1b6d66745ac1768adb387c2227cdcf4452271149': Split MPEG-1/2 decoder code off from MPEG-1/2 common code Conflicts: libavcodec/Makefile libavcodec/mpeg12.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/mpeg12dec.c')
-rw-r--r--libavcodec/mpeg12dec.c2593
1 files changed, 2593 insertions, 0 deletions
diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c
new file mode 100644
index 0000000000..b432f6ac5e
--- /dev/null
+++ b/libavcodec/mpeg12dec.c
@@ -0,0 +1,2593 @@
+/*
+ * MPEG-1/2 decoder
+ * Copyright (c) 2000, 2001 Fabrice Bellard
+ * Copyright (c) 2002-2013 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * MPEG-1/2 decoder
+ */
+
+//#define DEBUG
+#include "libavutil/internal.h"
+#include "internal.h"
+#include "avcodec.h"
+#include "dsputil.h"
+#include "mpegvideo.h"
+#include "error_resilience.h"
+#include "mpeg12.h"
+#include "mpeg12data.h"
+#include "mpeg12decdata.h"
+#include "bytestream.h"
+#include "vdpau_internal.h"
+#include "xvmc_internal.h"
+#include "thread.h"
+
+/* as H.263, but only 17 codes */
+static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
+{
+ int code, sign, val, shift;
+
+ code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2);
+ if (code == 0) {
+ return pred;
+ }
+ if (code < 0) {
+ return 0xffff;
+ }
+
+ sign = get_bits1(&s->gb);
+ shift = fcode - 1;
+ val = code;
+ if (shift) {
+ val = (val - 1) << shift;
+ val |= get_bits(&s->gb, shift);
+ val++;
+ }
+ if (sign)
+ val = -val;
+ val += pred;
+
+ /* modulo decoding */
+ return sign_extend(val, 5 + shift);
+}
+
+static inline int mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
+{
+ int level, dc, diff, i, j, run;
+ int component;
+ RLTable *rl = &ff_rl_mpeg1;
+ uint8_t * const scantable = s->intra_scantable.permutated;
+ const uint16_t *quant_matrix = s->intra_matrix;
+ const int qscale = s->qscale;
+
+ /* DC coefficient */
+ component = (n <= 3 ? 0 : n - 4 + 1);
+ diff = decode_dc(&s->gb, component);
+ if (diff >= 0xffff)
+ return -1;
+ dc = s->last_dc[component];
+ dc += diff;
+ s->last_dc[component] = dc;
+ block[0] = dc * quant_matrix[0];
+ av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
+ i = 0;
+ {
+ OPEN_READER(re, &s->gb);
+ /* now quantify & encode AC coefficients */
+ for (;;) {
+ UPDATE_CACHE(re, &s->gb);
+ GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
+
+ if (level == 127) {
+ break;
+ } else if (level != 0) {
+ i += run;
+ j = scantable[i];
+ level = (level * qscale * quant_matrix[j]) >> 4;
+ level = (level - 1) | 1;
+ level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
+ LAST_SKIP_BITS(re, &s->gb, 1);
+ } else {
+ /* escape */
+ run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
+ UPDATE_CACHE(re, &s->gb);
+ level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
+ if (level == -128) {
+ level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
+ } else if (level == 0) {
+ level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
+ }
+ i += run;
+ j = scantable[i];
+ if (level < 0) {
+ level = -level;
+ level = (level * qscale * quant_matrix[j]) >> 4;
+ level = (level - 1) | 1;
+ level = -level;
+ } else {
+ level = (level * qscale * quant_matrix[j]) >> 4;
+ level = (level - 1) | 1;
+ }
+ }
+ if (i > 63) {
+ av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
+ return -1;
+ }
+
+ block[j] = level;
+ }
+ CLOSE_READER(re, &s->gb);
+ }
+ s->block_last_index[n] = i;
+ return 0;
+}
+
+int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
+{
+ return mpeg1_decode_block_intra(s, block, n);
+}
+
+static inline int mpeg1_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
+{
+ int level, i, j, run;
+ RLTable *rl = &ff_rl_mpeg1;
+ uint8_t * const scantable = s->intra_scantable.permutated;
+ const uint16_t *quant_matrix = s->inter_matrix;
+ const int qscale = s->qscale;
+
+ {
+ OPEN_READER(re, &s->gb);
+ i = -1;
+ // special case for first coefficient, no need to add second VLC table
+ UPDATE_CACHE(re, &s->gb);
+ if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
+ level = (3 * qscale * quant_matrix[0]) >> 5;
+ level = (level - 1) | 1;
+ if (GET_CACHE(re, &s->gb) & 0x40000000)
+ level = -level;
+ block[0] = level;
+ i++;
+ SKIP_BITS(re, &s->gb, 2);
+ if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ goto end;
+ }
+ /* now quantify & encode AC coefficients */
+ for (;;) {
+ GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
+
+ if (level != 0) {
+ i += run;
+ j = scantable[i];
+ level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
+ level = (level - 1) | 1;
+ level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
+ SKIP_BITS(re, &s->gb, 1);
+ } else {
+ /* escape */
+ run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
+ UPDATE_CACHE(re, &s->gb);
+ level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
+ if (level == -128) {
+ level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
+ } else if (level == 0) {
+ level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
+ }
+ i += run;
+ j = scantable[i];
+ if (level < 0) {
+ level = -level;
+ level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
+ level = (level - 1) | 1;
+ level = -level;
+ } else {
+ level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
+ level = (level - 1) | 1;
+ }
+ }
+ if (i > 63) {
+ av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
+ return -1;
+ }
+
+ block[j] = level;
+ if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ break;
+ UPDATE_CACHE(re, &s->gb);
+ }
+end:
+ LAST_SKIP_BITS(re, &s->gb, 2);
+ CLOSE_READER(re, &s->gb);
+ }
+ s->block_last_index[n] = i;
+ return 0;
+}
+
+/**
+ * Note: this function can read out of range and crash for corrupt streams.
+ * Changing this would eat up any speed benefits it has.
+ * Do not use "fast" flag if you need the code to be robust.
+ */
+static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n)
+{
+ int level, i, j, run;
+ RLTable *rl = &ff_rl_mpeg1;
+ uint8_t * const scantable = s->intra_scantable.permutated;
+ const int qscale = s->qscale;
+
+ {
+ OPEN_READER(re, &s->gb);
+ i = -1;
+ // special case for first coefficient, no need to add second VLC table
+ UPDATE_CACHE(re, &s->gb);
+ if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
+ level = (3 * qscale) >> 1;
+ level = (level - 1) | 1;
+ if (GET_CACHE(re, &s->gb) & 0x40000000)
+ level = -level;
+ block[0] = level;
+ i++;
+ SKIP_BITS(re, &s->gb, 2);
+ if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ goto end;
+ }
+
+ /* now quantify & encode AC coefficients */
+ for (;;) {
+ GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
+
+ if (level != 0) {
+ i += run;
+ j = scantable[i];
+ level = ((level * 2 + 1) * qscale) >> 1;
+ level = (level - 1) | 1;
+ level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
+ SKIP_BITS(re, &s->gb, 1);
+ } else {
+ /* escape */
+ run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
+ UPDATE_CACHE(re, &s->gb);
+ level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
+ if (level == -128) {
+ level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
+ } else if (level == 0) {
+ level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
+ }
+ i += run;
+ j = scantable[i];
+ if (level < 0) {
+ level = -level;
+ level = ((level * 2 + 1) * qscale) >> 1;
+ level = (level - 1) | 1;
+ level = -level;
+ } else {
+ level = ((level * 2 + 1) * qscale) >> 1;
+ level = (level - 1) | 1;
+ }
+ }
+
+ block[j] = level;
+ if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ break;
+ UPDATE_CACHE(re, &s->gb);
+ }
+end:
+ LAST_SKIP_BITS(re, &s->gb, 2);
+ CLOSE_READER(re, &s->gb);
+ }
+ s->block_last_index[n] = i;
+ return 0;
+}
+
+
+static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n)
+{
+ int level, i, j, run;
+ RLTable *rl = &ff_rl_mpeg1;
+ uint8_t * const scantable = s->intra_scantable.permutated;
+ const uint16_t *quant_matrix;
+ const int qscale = s->qscale;
+ int mismatch;
+
+ mismatch = 1;
+
+ {
+ OPEN_READER(re, &s->gb);
+ i = -1;
+ if (n < 4)
+ quant_matrix = s->inter_matrix;
+ else
+ quant_matrix = s->chroma_inter_matrix;
+
+ // special case for first coefficient, no need to add second VLC table
+ UPDATE_CACHE(re, &s->gb);
+ if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
+ level= (3 * qscale * quant_matrix[0]) >> 5;
+ if (GET_CACHE(re, &s->gb) & 0x40000000)
+ level = -level;
+ block[0] = level;
+ mismatch ^= level;
+ i++;
+ SKIP_BITS(re, &s->gb, 2);
+ if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ goto end;
+ }
+
+ /* now quantify & encode AC coefficients */
+ for (;;) {
+ GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
+
+ if (level != 0) {
+ i += run;
+ j = scantable[i];
+ level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
+ level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
+ SKIP_BITS(re, &s->gb, 1);
+ } else {
+ /* escape */
+ run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
+ UPDATE_CACHE(re, &s->gb);
+ level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
+
+ i += run;
+ j = scantable[i];
+ if (level < 0) {
+ level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
+ level = -level;
+ } else {
+ level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
+ }
+ }
+ if (i > 63) {
+ av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
+ return -1;
+ }
+
+ mismatch ^= level;
+ block[j] = level;
+ if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ break;
+ UPDATE_CACHE(re, &s->gb);
+ }
+end:
+ LAST_SKIP_BITS(re, &s->gb, 2);
+ CLOSE_READER(re, &s->gb);
+ }
+ block[63] ^= (mismatch & 1);
+
+ s->block_last_index[n] = i;
+ return 0;
+}
+
+/**
+ * Note: this function can read out of range and crash for corrupt streams.
+ * Changing this would eat up any speed benefits it has.
+ * Do not use "fast" flag if you need the code to be robust.
+ */
+static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
+ int16_t *block, int n)
+{
+ int level, i, j, run;
+ RLTable *rl = &ff_rl_mpeg1;
+ uint8_t * const scantable = s->intra_scantable.permutated;
+ const int qscale = s->qscale;
+ OPEN_READER(re, &s->gb);
+ i = -1;
+
+ // special case for first coefficient, no need to add second VLC table
+ UPDATE_CACHE(re, &s->gb);
+ if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
+ level = (3 * qscale) >> 1;
+ if (GET_CACHE(re, &s->gb) & 0x40000000)
+ level = -level;
+ block[0] = level;
+ i++;
+ SKIP_BITS(re, &s->gb, 2);
+ if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ goto end;
+ }
+
+ /* now quantify & encode AC coefficients */
+ for (;;) {
+ GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
+
+ if (level != 0) {
+ i += run;
+ j = scantable[i];
+ level = ((level * 2 + 1) * qscale) >> 1;
+ level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
+ SKIP_BITS(re, &s->gb, 1);
+ } else {
+ /* escape */
+ run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6);
+ UPDATE_CACHE(re, &s->gb);
+ level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
+
+ i += run;
+ j = scantable[i];
+ if (level < 0) {
+ level = ((-level * 2 + 1) * qscale) >> 1;
+ level = -level;
+ } else {
+ level = ((level * 2 + 1) * qscale) >> 1;
+ }
+ }
+
+ block[j] = level;
+ if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ break;
+ UPDATE_CACHE(re, &s->gb);
+ }
+end:
+ LAST_SKIP_BITS(re, &s->gb, 2);
+ CLOSE_READER(re, &s->gb);
+ s->block_last_index[n] = i;
+ return 0;
+}
+
+
+static inline int mpeg2_decode_block_intra(MpegEncContext *s, 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;
+}
+
+/******************************************/
+/* decoding */
+
+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, ff_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, ff_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, ff_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) {
+ return avctx->get_format(avctx,
+ avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
+ mpeg1_hwaccel_pixfmt_list_420 :
+ mpeg2_hwaccel_pixfmt_list_420);
+ } else if(s->chroma_format == 2)
+ return AV_PIX_FMT_YUV422P;
+ else
+ return AV_PIX_FMT_YUV444P;
+}
+
+static void setup_hwaccel_for_pixfmt(AVCodecContext *avctx)
+{
+ if (avctx->pix_fmt != AV_PIX_FMT_XVMC_MPEG2_IDCT && avctx->pix_fmt != AV_PIX_FMT_XVMC_MPEG2_MC) {
+ avctx->xvmc_acceleration = 0;
+ } else if (!avctx->xvmc_acceleration) {
+ avctx->xvmc_acceleration = 2;
+ }
+ 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;
+}
+
+/* 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);
+ setup_hwaccel_for_pixfmt(avctx);
+
+ /* 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, ff_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_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, ff_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_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);
+ ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG2);
+ } 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);
+ ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG2);
+ }
+ }
+
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+static int mpeg1_decode_sequence(AVCodecContext *avctx,
+ const uint8_t *buf, int buf_size)
+{
+ Mpeg1Context *s1 = avctx->priv_data;
+ MpegEncContext *s = &s1->mpeg_enc_ctx;
+ int width, height;
+ int i, v, j;
+
+ init_get_bits(&s->gb, buf, buf_size*8);
+
+ width = get_bits(&s->gb, 12);
+ height = get_bits(&s->gb, 12);
+ if (width == 0 || height == 0) {
+ av_log(avctx, AV_LOG_WARNING, "Invalid horizontal or vertical size "
+ "value.\n");
+ if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
+ return AVERROR_INVALIDDATA;
+ }
+ 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);
+ setup_hwaccel_for_pixfmt(avctx);
+
+ 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);
+ }
+}
+
+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_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_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER)
+ && 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, "Invalid frame dimensions %dx%d.\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
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-13 04:49:47 +0000