* Copyright (c) 2000,2001 Fabrice Bellard
* Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#define UNCHECKED_BITSTREAM_READER 1
+
+#include "libavutil/opt.h"
#include "error_resilience.h"
#include "internal.h"
#include "mpegvideo.h"
int bits_count = get_bits_count(&s->gb);
int v = show_bits(&s->gb, 16);
- if (s->workaround_bugs & FF_BUG_NO_PADDING)
+ if (s->workaround_bugs & FF_BUG_NO_PADDING && !s->resync_marker)
return 0;
while (v <= 0xFF) {
v |= 0x7F >> (7 - (bits_count & 7));
if (v == 0x7F)
- return 1;
+ return s->mb_num;
} else {
if (v == ff_mpeg4_resync_prefix[bits_count & 7]) {
- int len;
+ int len, mb_num;
+ int mb_num_bits = av_log2(s->mb_num - 1) + 1;
GetBitContext gb = s->gb;
skip_bits(&s->gb, 1);
if (get_bits1(&s->gb))
break;
+ mb_num = get_bits(&s->gb, mb_num_bits);
+ if (!mb_num || mb_num > s->mb_num || get_bits_count(&s->gb)+6 > s->gb.size_in_bits)
+ mb_num= -1;
+
s->gb = gb;
if (len >= ff_mpeg4_get_video_packet_prefix_length(s))
- return 1;
+ return mb_num;
}
}
return 0;
return 0;
}
+static int decode_new_pred(Mpeg4DecContext *ctx, GetBitContext *gb) {
+ int len = FFMIN(ctx->time_increment_bits + 3, 15);
+
+ get_bits(gb, len);
+ if (get_bits1(gb))
+ get_bits(gb, len);
+ check_marker(gb, "after new_pred");
+
+ return 0;
+}
+
/**
* Decode the next video packet.
* @return <0 if something went wrong
"illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num);
return -1;
}
- if (s->pict_type == AV_PICTURE_TYPE_B) {
- int mb_x = 0, mb_y = 0;
-
- while (s->next_picture.mbskip_table[s->mb_index2xy[mb_num]]) {
- if (!mb_x)
- ff_thread_await_progress(&s->next_picture_ptr->tf, mb_y++, 0);
- mb_num++;
- if (++mb_x == s->mb_width)
- mb_x = 0;
- }
- if (mb_num >= s->mb_num)
- return -1; // slice contains just skipped MBs (already decoded)
- }
s->mb_x = mb_num % s->mb_width;
s->mb_y = mb_num / s->mb_width;
}
}
}
- // FIXME new-pred stuff
+ if (s->new_pred)
+ decode_new_pred(ctx, &s->gb);
return 0;
}
if (code > 8) {
if (get_bits1(&s->gb) == 0) { /* marker */
- if (s->err_recognition & AV_EF_BITSTREAM) {
+ if (s->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)) {
av_log(s->avctx, AV_LOG_ERROR, "dc marker bit missing\n");
return -1;
}
static inline int mpeg4_decode_block(MpegEncContext *s, int16_t *block,
int n, int coded, int intra, int rvlc)
{
- int level, i, last, run, qmul, qadd, dc_pred_dir;
+ int level, i, last, run, qmul, qadd;
+ int av_uninit(dc_pred_dir);
RLTable *rl;
RL_VLC_ELEM *rl_vlc;
const uint8_t *scan_table;
SKIP_COUNTER(re, &s->gb, 1 + 12 + 1);
}
+#if 0
+ if (s->error_recognition >= FF_ER_COMPLIANT) {
+ const int abs_level= FFABS(level);
+ if (abs_level<=MAX_LEVEL && run<=MAX_RUN) {
+ const int run1= run - rl->max_run[last][abs_level] - 1;
+ if (abs_level <= rl->max_level[last][run]) {
+ av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, vlc encoding possible\n");
+ return -1;
+ }
+ if (s->error_recognition > FF_ER_COMPLIANT) {
+ if (abs_level <= rl->max_level[last][run]*2) {
+ av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 1 encoding possible\n");
+ return -1;
+ }
+ if (run1 >= 0 && abs_level <= rl->max_level[last][run1]) {
+ av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 2 encoding possible\n");
+ return -1;
+ }
+ }
+ }
+ }
+#endif
if (level > 0)
level = level * qmul + qadd;
else
level = level * qmul - qadd;
if ((unsigned)(level + 2048) > 4095) {
- if (s->err_recognition & AV_EF_BITSTREAM) {
+ if (s->err_recognition & (AV_EF_BITSTREAM|AV_EF_AGGRESSIVE)) {
if (level > 2560 || level < -2560) {
av_log(s->avctx, AV_LOG_ERROR,
"|level| overflow in 3. esc, qp=%d\n",
static int8_t quant_tab[4] = { -1, -2, 1, 2 };
const int xy = s->mb_x + s->mb_y * s->mb_stride;
- assert(s->h263_pred);
+ av_assert2(s->h263_pred);
if (s->pict_type == AV_PICTURE_TYPE_P ||
s->pict_type == AV_PICTURE_TYPE_S) {
end:
/* per-MB end of slice check */
if (s->codec_id == AV_CODEC_ID_MPEG4) {
- if (mpeg4_is_resync(s)) {
- const int delta = s->mb_x + 1 == s->mb_width ? 2 : 1;
+ int next = mpeg4_is_resync(s);
+ if (next) {
+ if (s->mb_x + s->mb_y*s->mb_width + 1 > next && (s->avctx->err_recognition & AV_EF_AGGRESSIVE)) {
+ return -1;
+ } else if (s->mb_x + s->mb_y*s->mb_width + 1 >= next)
+ return SLICE_END;
- if (s->pict_type == AV_PICTURE_TYPE_B &&
- s->next_picture.mbskip_table[xy + delta]) {
+ if (s->pict_type == AV_PICTURE_TYPE_B) {
+ const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1;
ff_thread_await_progress(&s->next_picture_ptr->tf,
(s->mb_x + delta >= s->mb_width)
? FFMIN(s->mb_y + 1, s->mb_height - 1)
: s->mb_y, 0);
+ if (s->next_picture.mbskip_table[xy + delta])
+ return SLICE_OK;
}
- if (s->pict_type == AV_PICTURE_TYPE_B &&
- s->next_picture.mbskip_table[xy + delta])
- return SLICE_OK;
return SLICE_END;
}
}
static int mpeg4_decode_gop_header(MpegEncContext *s, GetBitContext *gb)
{
int hours, minutes, seconds;
- unsigned time_code = show_bits(gb, 18);
-
- if (time_code & 0x40) { /* marker_bit */
- hours = time_code >> 13;
- minutes = time_code >> 7 & 0x3f;
- seconds = time_code & 0x3f;
- s->time_base = seconds + 60 * (minutes + 60 * hours);
- skip_bits(gb, 20); /* time_code, closed_gov, broken_link */
- } else {
- av_log(s->avctx, AV_LOG_WARNING, "GOP header missing marker_bit\n");
+
+ if (!show_bits(gb, 23)) {
+ av_log(s->avctx, AV_LOG_WARNING, "GOP header invalid\n");
+ return -1;
}
+ hours = get_bits(gb, 5);
+ minutes = get_bits(gb, 6);
+ skip_bits1(gb);
+ seconds = get_bits(gb, 6);
+
+ s->time_base = seconds + 60*(minutes + 60*hours);
+
+ skip_bits1(gb);
+ skip_bits1(gb);
+
return 0;
}
static int mpeg4_decode_profile_level(MpegEncContext *s, GetBitContext *gb)
{
- int profile_and_level_indication;
- profile_and_level_indication = get_bits(gb, 8);
-
- s->avctx->profile = (profile_and_level_indication & 0xf0) >> 4;
- s->avctx->level = (profile_and_level_indication & 0x0f);
+ s->avctx->profile = get_bits(gb, 4);
+ s->avctx->level = get_bits(gb, 4);
// for Simple profile, level 0
if (s->avctx->profile == 0 && s->avctx->level == 8) {
if (ctx->shape != BIN_ONLY_SHAPE) {
if (ctx->shape == RECT_SHAPE) {
- skip_bits1(gb); /* marker */
+ check_marker(gb, "before width");
width = get_bits(gb, 13);
- skip_bits1(gb); /* marker */
+ check_marker(gb, "before height");
height = get_bits(gb, 13);
- skip_bits1(gb); /* marker */
+ check_marker(gb, "after height");
if (width && height && /* they should be non zero but who knows */
!(s->width && s->codec_tag == AV_RL32("MP4S"))) {
if (s->width && s->height &&
if (s->quant_precision != 5)
av_log(s->avctx, AV_LOG_ERROR,
"quant precision %d\n", s->quant_precision);
+ if (s->quant_precision<3 || s->quant_precision>9) {
+ s->quant_precision = 5;
+ }
} else {
s->quant_precision = 5;
}
}
}
+ if (s->avctx->debug&FF_DEBUG_PICT_INFO) {
+ av_log(s->avctx, AV_LOG_DEBUG, "tb %d/%d, tincrbits:%d, qp_prec:%d, ps:%d, %s%s%s%s\n",
+ s->avctx->time_base.num, s->avctx->time_base.den,
+ ctx->time_increment_bits,
+ s->quant_precision,
+ s->progressive_sequence,
+ s->scalability ? "scalability " :"" , s->quarter_sample ? "qpel " : "",
+ s->data_partitioning ? "partition " : "", s->rvlc ? "rvlc " : ""
+ );
+ }
+
return 0;
}
s->divx_build = build;
s->divx_packed = e == 3 && last == 'p';
if (s->divx_packed && !s->showed_packed_warning) {
- av_log(s->avctx, AV_LOG_WARNING,
- "Invalid and inefficient vfw-avi packed B frames detected\n");
+ av_log(s->avctx, AV_LOG_INFO, "Video uses a non-standard and "
+ "wasteful way to store B-frames ('packed B-frames'). "
+ "Consider using a tool like VirtualDub or avidemux to fix it.\n");
s->showed_packed_warning = 1;
}
}
{
MpegEncContext *s = &ctx->m;
int time_incr, time_increment;
+ int64_t pts;
s->pict_type = get_bits(gb, 2) + AV_PICTURE_TYPE_I; /* pict type: I = 0 , P = 1 */
if (s->pict_type == AV_PICTURE_TYPE_B && s->low_delay &&
av_log(s->avctx, AV_LOG_ERROR,
"my guess is %d bits ;)\n", ctx->time_increment_bits);
+ if (s->avctx->time_base.den && 4*s->avctx->time_base.den < 1<<ctx->time_increment_bits) {
+ s->avctx->time_base.den = 1<<ctx->time_increment_bits;
+ }
}
if (IS_3IV1)
}
}
+ if (s->avctx->time_base.num)
+ pts = ROUNDED_DIV(s->time, s->avctx->time_base.num);
+ else
+ pts = AV_NOPTS_VALUE;
+ if (s->avctx->debug&FF_DEBUG_PTS)
+ av_log(s->avctx, AV_LOG_DEBUG, "MPEG4 PTS: %"PRId64"\n",
+ pts);
+
check_marker(gb, "before vop_coded");
/* vop coded */
av_log(s->avctx, AV_LOG_ERROR, "vop not coded\n");
return FRAME_SKIPPED;
}
+ if (s->new_pred)
+ decode_new_pred(ctx, gb);
+
if (ctx->shape != BIN_ONLY_SHAPE &&
(s->pict_type == AV_PICTURE_TYPE_P ||
(s->pict_type == AV_PICTURE_TYPE_S &&
if (s->pict_type == AV_PICTURE_TYPE_B)
skip_bits_long(gb, s->cplx_estimation_trash_b);
+ if (get_bits_left(gb) < 3) {
+ av_log(s->avctx, AV_LOG_ERROR, "Header truncated\n");
+ return -1;
+ }
s->intra_dc_threshold = ff_mpeg4_dc_threshold[get_bits(gb, 3)];
if (!s->progressive_sequence) {
s->top_field_first = get_bits1(gb);
if (s->f_code == 0) {
av_log(s->avctx, AV_LOG_ERROR,
"Error, header damaged or not MPEG4 header (f_code=0)\n");
+ s->f_code = 1;
return -1; // makes no sense to continue, as there is nothing left from the image then
}
} else
if (s->pict_type == AV_PICTURE_TYPE_B) {
s->b_code = get_bits(gb, 3);
+ if (s->b_code == 0) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Error, header damaged or not MPEG4 header (b_code=0)\n");
+ s->b_code=1;
+ return -1; // makes no sense to continue, as the MV decoding will break very quickly
+ }
} else
s->b_code = 1;
if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
av_log(s->avctx, AV_LOG_DEBUG,
- "qp:%d fc:%d,%d %s size:%d pro:%d alt:%d top:%d %spel part:%d resync:%d w:%d a:%d rnd:%d vot:%d%s dc:%d ce:%d/%d/%d\n",
+ "qp:%d fc:%d,%d %s size:%d pro:%d alt:%d top:%d %spel part:%d resync:%d w:%d a:%d rnd:%d vot:%d%s dc:%d ce:%d/%d/%d time:%"PRId64" tincr:%d\n",
s->qscale, s->f_code, s->b_code,
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")),
- gb->size_in_bits, s->progressive_sequence, s->alternate_scan,
+ gb->size_in_bits,s->progressive_sequence, s->alternate_scan,
s->top_field_first, s->quarter_sample ? "q" : "h",
s->data_partitioning, s->resync_marker,
s->num_sprite_warping_points, s->sprite_warping_accuracy,
1 - s->no_rounding, s->vo_type,
s->vol_control_parameters ? " VOLC" : " ", s->intra_dc_threshold,
s->cplx_estimation_trash_i, s->cplx_estimation_trash_p,
- s->cplx_estimation_trash_b);
+ s->cplx_estimation_trash_b,
+ s->time,
+ time_increment
+ );
}
if (!s->scalability) {
for (;;) {
if (get_bits_count(gb) >= gb->size_in_bits) {
if (gb->size_in_bits == 8 &&
- (s->divx_version >= 0 || s->xvid_build >= 0)) {
- av_log(s->avctx, AV_LOG_WARNING, "frame skip %d\n", gb->size_in_bits);
+ (s->divx_version >= 0 || s->xvid_build >= 0) || s->codec_tag == AV_RL32("QMP4")) {
+ av_log(s->avctx, AV_LOG_VERBOSE, "frame skip %d\n", gb->size_in_bits);
return FRAME_SKIPPED; // divx bug
} else
return -1; // end of stream
return decode_vop_header(ctx, gb);
}
+av_cold void ff_mpeg4videodec_static_init(void) {
+ static int done = 0;
+
+ if (!done) {
+ ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
+ ff_init_rl(&ff_rvlc_rl_inter, ff_mpeg4_static_rl_table_store[1]);
+ ff_init_rl(&ff_rvlc_rl_intra, ff_mpeg4_static_rl_table_store[2]);
+ INIT_VLC_RL(ff_mpeg4_rl_intra, 554);
+ INIT_VLC_RL(ff_rvlc_rl_inter, 1072);
+ INIT_VLC_RL(ff_rvlc_rl_intra, 1072);
+ INIT_VLC_STATIC(&dc_lum, DC_VLC_BITS, 10 /* 13 */,
+ &ff_mpeg4_DCtab_lum[0][1], 2, 1,
+ &ff_mpeg4_DCtab_lum[0][0], 2, 1, 512);
+ INIT_VLC_STATIC(&dc_chrom, DC_VLC_BITS, 10 /* 13 */,
+ &ff_mpeg4_DCtab_chrom[0][1], 2, 1,
+ &ff_mpeg4_DCtab_chrom[0][0], 2, 1, 512);
+ INIT_VLC_STATIC(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15,
+ &ff_sprite_trajectory_tab[0][1], 4, 2,
+ &ff_sprite_trajectory_tab[0][0], 4, 2, 128);
+ INIT_VLC_STATIC(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4,
+ &ff_mb_type_b_tab[0][1], 2, 1,
+ &ff_mb_type_b_tab[0][0], 2, 1, 16);
+ done = 1;
+ }
+}
+
static int mpeg4_update_thread_context(AVCodecContext *dst,
const AVCodecContext *src)
{
Mpeg4DecContext *ctx = avctx->priv_data;
MpegEncContext *s = &ctx->m;
int ret;
- static int done = 0;
s->divx_version =
s->divx_build =
if ((ret = ff_h263_decode_init(avctx)) < 0)
return ret;
- if (!done) {
- done = 1;
-
- ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
- ff_init_rl(&ff_rvlc_rl_inter, ff_mpeg4_static_rl_table_store[1]);
- ff_init_rl(&ff_rvlc_rl_intra, ff_mpeg4_static_rl_table_store[2]);
- INIT_VLC_RL(ff_mpeg4_rl_intra, 554);
- INIT_VLC_RL(ff_rvlc_rl_inter, 1072);
- INIT_VLC_RL(ff_rvlc_rl_intra, 1072);
- INIT_VLC_STATIC(&dc_lum, DC_VLC_BITS, 10 /* 13 */,
- &ff_mpeg4_DCtab_lum[0][1], 2, 1,
- &ff_mpeg4_DCtab_lum[0][0], 2, 1, 512);
- INIT_VLC_STATIC(&dc_chrom, DC_VLC_BITS, 10 /* 13 */,
- &ff_mpeg4_DCtab_chrom[0][1], 2, 1,
- &ff_mpeg4_DCtab_chrom[0][0], 2, 1, 512);
- INIT_VLC_STATIC(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15,
- &ff_sprite_trajectory_tab[0][1], 4, 2,
- &ff_sprite_trajectory_tab[0][0], 4, 2, 128);
- INIT_VLC_STATIC(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4,
- &ff_mb_type_b_tab[0][1], 2, 1,
- &ff_mb_type_b_tab[0][0], 2, 1, 16);
- }
+ ff_mpeg4videodec_static_init();
s->h263_pred = 1;
- s->low_delay = 0; /* default, might be overriden in the vol header during header parsing */
+ s->low_delay = 0; /* default, might be overridden in the vol header during header parsing */
s->decode_mb = mpeg4_decode_mb;
ctx->time_increment_bits = 4; /* default value for broken headers */
{ FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE, "Advanced Scalable Texture Profile" },
{ FF_PROFILE_MPEG4_SIMPLE_STUDIO, "Simple Studio Profile" },
{ FF_PROFILE_MPEG4_ADVANCED_SIMPLE, "Advanced Simple Profile" },
+ { FF_PROFILE_UNKNOWN },
+};
+
+static const AVOption mpeg4_options[] = {
+ {"quarter_sample", "1/4 subpel MC", offsetof(MpegEncContext, quarter_sample), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 1, 0},
+ {"divx_packed", "divx style packed b frames", offsetof(MpegEncContext, divx_packed), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 1, 0},
+ {NULL}
+};
+
+static const AVClass mpeg4_class = {
+ "MPEG4 Video Decoder",
+ av_default_item_name,
+ mpeg4_options,
+ LIBAVUTIL_VERSION_INT,
+};
+
+static const AVClass mpeg4_vdpau_class = {
+ "MPEG4 Video VDPAU Decoder",
+ av_default_item_name,
+ mpeg4_options,
+ LIBAVUTIL_VERSION_INT,
};
AVCodec ff_mpeg4_decoder = {
CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
CODEC_CAP_FRAME_THREADS,
.flush = ff_mpeg_flush,
+ .max_lowres = 3,
.pix_fmts = ff_h263_hwaccel_pixfmt_list_420,
.profiles = NULL_IF_CONFIG_SMALL(mpeg4_video_profiles),
.update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg4_update_thread_context),
+ .priv_class = &mpeg4_class,
+};
+
+
+#if CONFIG_MPEG4_VDPAU_DECODER
+AVCodec ff_mpeg4_vdpau_decoder = {
+ .name = "mpeg4_vdpau",
+ .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 (VDPAU)"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_MPEG4,
+ .priv_data_size = sizeof(MpegEncContext),
+ .init = decode_init,
+ .close = ff_h263_decode_end,
+ .decode = ff_h263_decode_frame,
+ .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
+ CODEC_CAP_HWACCEL_VDPAU,
+ .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_VDPAU_MPEG4,
+ AV_PIX_FMT_NONE },
+ .priv_class = &mpeg4_vdpau_class,
};
+#endif