* AVI demuxer
* Copyright (c) 2001 Fabrice Bellard
*
- * 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
*/
#include <inttypes.h>
+#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bswap.h"
+#include "libavutil/opt.h"
#include "libavutil/dict.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "internal.h"
#include "riff.h"
-#undef NDEBUG
-#include <assert.h>
-
typedef struct AVIStream {
int64_t frame_offset; /* current frame (video) or byte (audio) counter
* (used to compute the pts) */
AVFormatContext *sub_ctx;
AVPacket sub_pkt;
uint8_t *sub_buffer;
+
+ int64_t seek_pos;
} AVIStream;
typedef struct {
+ const AVClass *class;
int64_t riff_end;
int64_t movi_end;
int64_t fsize;
+ int64_t io_fsize;
int64_t movi_list;
int64_t last_pkt_pos;
int index_loaded;
int stream_index;
DVDemuxContext *dv_demux;
int odml_depth;
+ int use_odml;
#define MAX_ODML_DEPTH 1000
+ int64_t dts_max;
} AVIContext;
+
+static const AVOption options[] = {
+ { "use_odml", "use odml index", offsetof(AVIContext, use_odml), AV_OPT_TYPE_INT, {.i64 = 1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM},
+ { NULL },
+};
+
+static const AVClass demuxer_class = {
+ .class_name = "avi",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+ .category = AV_CLASS_CATEGORY_DEMUXER,
+};
+
+
static const char avi_headers[][8] = {
{ 'R', 'I', 'F', 'F', 'A', 'V', 'I', ' ' },
{ 'R', 'I', 'F', 'F', 'A', 'V', 'I', 'X' },
static int guess_ni_flag(AVFormatContext *s);
#define print_tag(str, tag, size) \
- av_dlog(NULL, "%s: tag=%c%c%c%c size=0x%x\n", \
- str, tag & 0xff, \
+ av_dlog(NULL, "pos:%"PRIX64" %s: tag=%c%c%c%c size=0x%x\n", \
+ avio_tell(pb), str, tag & 0xff, \
(tag >> 8) & 0xff, \
(tag >> 16) & 0xff, \
(tag >> 24) & 0xff, \
AVIStream *ast;
int i;
int64_t last_pos = -1;
- int64_t filesize = avio_size(s->pb);
+ int64_t filesize = avi->fsize;
av_dlog(s,
"longs_pre_entry:%d index_type:%d entries_in_use:%d "
int key = len >= 0;
len &= 0x7FFFFFFF;
- av_dlog(s, "pos:%"PRId64", len:%X\n", pos, len);
-
- if (pb->eof_reached)
+#ifdef DEBUG_SEEK
+ av_log(s, AV_LOG_ERROR, "pos:%"PRId64", len:%X\n", pos, len);
+#endif
+ if (url_feof(pb))
return AVERROR_INVALIDDATA;
if (last_pos == pos || pos == base - 8)
avio_rl32(pb); /* size */
duration = avio_rl32(pb);
- if (pb->eof_reached)
+ if (url_feof(pb))
return AVERROR_INVALIDDATA;
pos = avio_tell(pb);
return AVERROR_INVALIDDATA;
}
- avio_seek(pb, offset + 8, SEEK_SET);
+ if (avio_seek(pb, offset + 8, SEEK_SET) < 0)
+ return -1;
avi->odml_depth++;
read_braindead_odml_indx(s, frame_num);
avi->odml_depth--;
frame_num += duration;
- avio_seek(pb, pos, SEEK_SET);
+ if (avio_seek(pb, pos, SEEK_SET) < 0) {
+ av_log(s, AV_LOG_ERROR, "Failed to restore position after reading index\n");
+ return -1;
+ }
+
}
}
- avi->index_loaded = 1;
+ avi->index_loaded = 2;
return 0;
}
uint16_t size = avio_rl16(s->pb);
const char *name = NULL;
char buffer[64] = { 0 };
+ size = FFMIN(size, tag_end - avio_tell(s->pb));
size -= avio_read(s->pb, buffer,
FFMIN(size, sizeof(buffer) - 1));
switch (tag) {
}
}
+static int calculate_bitrate(AVFormatContext *s)
+{
+ AVIContext *avi = s->priv_data;
+ int i, j;
+ int64_t lensum = 0;
+ int64_t maxpos = 0;
+
+ for (i = 0; i<s->nb_streams; i++) {
+ int64_t len = 0;
+ AVStream *st = s->streams[i];
+
+ if (!st->nb_index_entries)
+ continue;
+
+ for (j = 0; j < st->nb_index_entries; j++)
+ len += st->index_entries[j].size;
+ maxpos = FFMAX(maxpos, st->index_entries[j-1].pos);
+ lensum += len;
+ }
+ if (maxpos < avi->io_fsize*9/10) // index doesnt cover the whole file
+ return 0;
+ if (lensum*9/10 > maxpos || lensum < maxpos*9/10) // frame sum and filesize mismatch
+ return 0;
+
+ for (i = 0; i<s->nb_streams; i++) {
+ int64_t len = 0;
+ AVStream *st = s->streams[i];
+ int64_t duration;
+
+ for (j = 0; j < st->nb_index_entries; j++)
+ len += st->index_entries[j].size;
+
+ if (st->nb_index_entries < 2 || st->codec->bit_rate > 0)
+ continue;
+ duration = st->index_entries[j-1].timestamp - st->index_entries[0].timestamp;
+ st->codec->bit_rate = av_rescale(8*len, st->time_base.den, duration * st->time_base.num);
+ }
+ return 1;
+}
+
static int avi_read_header(AVFormatContext *s)
{
AVIContext *avi = s->priv_data;
int amv_file_format = 0;
uint64_t list_end = 0;
int ret;
+ AVDictionaryEntry *dict_entry;
avi->stream_index = -1;
if (ret < 0)
return ret;
- avi->fsize = avio_size(pb);
- if (avi->fsize <= 0)
+ av_log(avi, AV_LOG_DEBUG, "use odml:%d\n", avi->use_odml);
+
+ avi->io_fsize = avi->fsize = avio_size(pb);
+ if (avi->fsize <= 0 || avi->fsize < avi->riff_end)
avi->fsize = avi->riff_end == 8 ? INT64_MAX : avi->riff_end;
/* first list tag */
codec_type = -1;
frame_period = 0;
for (;;) {
- if (pb->eof_reached)
+ if (url_feof(pb))
goto fail;
tag = avio_rl32(pb);
size = avio_rl32(pb);
if (size)
avi->movi_end = avi->movi_list + size + (size & 1);
else
- avi->movi_end = avio_size(pb);
+ avi->movi_end = avi->fsize;
av_dlog(NULL, "movi end=%"PRIx64"\n", avi->movi_end);
goto end_of_header;
} else if (tag1 == MKTAG('I', 'N', 'F', 'O'))
/* AVI header */
/* using frame_period is bad idea */
frame_period = avio_rl32(pb);
- avio_skip(pb, 4);
+ avio_rl32(pb); /* max. bytes per second */
avio_rl32(pb);
avi->non_interleaved |= avio_rl32(pb) & AVIF_MUSTUSEINDEX;
ast = s->streams[0]->priv_data;
av_freep(&s->streams[0]->codec->extradata);
av_freep(&s->streams[0]->codec);
+ if (s->streams[0]->info)
+ av_freep(&s->streams[0]->info->duration_error);
av_freep(&s->streams[0]->info);
av_freep(&s->streams[0]);
s->nb_streams = 0;
break;
}
- assert(stream_index < s->nb_streams);
+ av_assert0(stream_index < s->nb_streams);
st->codec->stream_codec_tag = handler;
avio_rl32(pb); /* flags */
st->start_time = 0;
avio_rl32(pb); /* buffer size */
avio_rl32(pb); /* quality */
+ if (ast->cum_len*ast->scale/ast->rate > 3600) {
+ av_log(s, AV_LOG_ERROR, "crazy start time, iam scared, giving up\n");
+ return AVERROR_INVALIDDATA;
+ }
ast->sample_size = avio_rl32(pb); /* sample ssize */
ast->cum_len *= FFMAX(1, ast->sample_size);
av_dlog(s, "%"PRIu32" %"PRIu32" %d\n",
codec_type = AVMEDIA_TYPE_DATA;
break;
default:
- av_log(s, AV_LOG_ERROR, "unknown stream type %X\n", tag1);
- goto fail;
+ av_log(s, AV_LOG_INFO, "unknown stream type %X\n", tag1);
}
- if (ast->sample_size == 0)
+ if (ast->sample_size == 0) {
st->duration = st->nb_frames;
+ if (st->duration > 0 && avi->io_fsize > 0 && avi->riff_end > avi->io_fsize) {
+ av_log(s, AV_LOG_DEBUG, "File is truncated adjusting duration\n");
+ st->duration = av_rescale(st->duration, avi->io_fsize, avi->riff_end);
+ }
+ }
ast->frame_offset = ast->cum_len;
avio_skip(pb, size - 12 * 4);
break;
case MKTAG('s', 't', 'r', 'f'):
/* stream header */
+ if (!size)
+ break;
if (stream_index >= (unsigned)s->nb_streams || avi->dv_demux) {
avio_skip(pb, size);
} else {
uint64_t cur_pos = avio_tell(pb);
+ unsigned esize;
if (cur_pos < list_end)
size = FFMIN(size, list_end - cur_pos);
st = s->streams[stream_index];
+ if (st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
+ avio_skip(pb, size);
+ break;
+ }
switch (codec_type) {
case AVMEDIA_TYPE_VIDEO:
if (amv_file_format) {
avio_skip(pb, size);
break;
}
- tag1 = ff_get_bmp_header(pb, st);
+ tag1 = ff_get_bmp_header(pb, st, &esize);
if (tag1 == MKTAG('D', 'X', 'S', 'B') ||
tag1 == MKTAG('D', 'X', 'S', 'A')) {
break;
}
- if (size > 10 * 4 && size < (1 << 30)) {
- st->codec->extradata_size = size - 10 * 4;
- st->codec->extradata = av_malloc(st->codec->extradata_size +
- FF_INPUT_BUFFER_PADDING_SIZE);
- if (!st->codec->extradata) {
- st->codec->extradata_size = 0;
+ if (size > 10 * 4 && size < (1 << 30) && size < avi->fsize) {
+ if (esize == size-1 && (esize&1)) {
+ st->codec->extradata_size = esize - 10 * 4;
+ } else
+ st->codec->extradata_size = size - 10 * 4;
+ if (ff_get_extradata(st->codec, pb, st->codec->extradata_size) < 0)
return AVERROR(ENOMEM);
- }
- avio_read(pb,
- st->codec->extradata,
- st->codec->extradata_size);
}
// FIXME: check if the encoder really did this correctly
/* Extract palette from extradata if bpp <= 8.
* This code assumes that extradata contains only palette.
* This is true for all paletted codecs implemented in
- * Libav. */
+ * FFmpeg. */
if (st->codec->extradata_size &&
(st->codec->bits_per_coded_sample <= 8)) {
int pal_size = (1 << st->codec->bits_per_coded_sample) << 2;
pal_size = FFMIN(pal_size, st->codec->extradata_size);
pal_src = st->codec->extradata +
st->codec->extradata_size - pal_size;
-#if HAVE_BIGENDIAN
for (i = 0; i < pal_size / 4; i++)
- ast->pal[i] = av_bswap32(((uint32_t *)pal_src)[i]);
-#else
- memcpy(ast->pal, pal_src, pal_size);
-#endif
+ ast->pal[i] = 0xFFU<<24 | AV_RL32(pal_src+4*i);
ast->has_pal = 1;
}
/* This is needed to get the pict type which is necessary
* for generating correct pts. */
st->need_parsing = AVSTREAM_PARSE_HEADERS;
- // Support "Resolution 1:1" for Avid AVI Codec
- if (tag1 == MKTAG('A', 'V', 'R', 'n') &&
- st->codec->extradata_size >= 31 &&
- !memcmp(&st->codec->extradata[28], "1:1", 3))
- st->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
+ if (st->codec->codec_tag == MKTAG('V', 'S', 'S', 'H'))
+ st->need_parsing = AVSTREAM_PARSE_FULL;
if (st->codec->codec_tag == 0 && st->codec->height > 0 &&
st->codec->extradata_size < 1U << 30) {
if (st->codec->stream_codec_tag == AV_RL32("Axan")) {
st->codec->codec_id = AV_CODEC_ID_XAN_DPCM;
st->codec->codec_tag = 0;
+ ast->dshow_block_align = 0;
}
if (amv_file_format) {
st->codec->codec_id = AV_CODEC_ID_ADPCM_IMA_AMV;
ast->dshow_block_align = 0;
}
+ if (st->codec->codec_id == AV_CODEC_ID_AAC && ast->dshow_block_align <= 4 && ast->dshow_block_align) {
+ av_log(s, AV_LOG_DEBUG, "overriding invalid dshow_block_align of %d\n", ast->dshow_block_align);
+ ast->dshow_block_align = 0;
+ }
+ if (st->codec->codec_id == AV_CODEC_ID_AAC && ast->dshow_block_align == 1024 && ast->sample_size == 1024 ||
+ st->codec->codec_id == AV_CODEC_ID_AAC && ast->dshow_block_align == 4096 && ast->sample_size == 4096 ||
+ st->codec->codec_id == AV_CODEC_ID_MP3 && ast->dshow_block_align == 1152 && ast->sample_size == 1152) {
+ av_log(s, AV_LOG_DEBUG, "overriding sample_size\n");
+ ast->sample_size = 0;
+ }
break;
case AVMEDIA_TYPE_SUBTITLE:
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
- st->codec->codec_id = AV_CODEC_ID_PROBE;
+ st->request_probe= 1;
+ avio_skip(pb, size);
break;
default:
st->codec->codec_type = AVMEDIA_TYPE_DATA;
}
}
break;
+ case MKTAG('s', 't', 'r', 'd'):
+ if (stream_index >= (unsigned)s->nb_streams
+ || s->streams[stream_index]->codec->extradata_size
+ || s->streams[stream_index]->codec->codec_tag == MKTAG('H','2','6','4')) {
+ avio_skip(pb, size);
+ } else {
+ uint64_t cur_pos = avio_tell(pb);
+ if (cur_pos < list_end)
+ size = FFMIN(size, list_end - cur_pos);
+ st = s->streams[stream_index];
+
+ if (size<(1<<30)) {
+ if (ff_get_extradata(st->codec, pb, size) < 0)
+ return AVERROR(ENOMEM);
+ }
+
+ if (st->codec->extradata_size & 1) //FIXME check if the encoder really did this correctly
+ avio_r8(pb);
+ }
+ break;
case MKTAG('i', 'n', 'd', 'x'):
i = avio_tell(pb);
if (pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
+ avi->use_odml &&
read_braindead_odml_indx(s, 0) < 0 &&
(s->error_recognition & AV_EF_EXPLODE))
goto fail;
if (s->error_recognition & AV_EF_EXPLODE)
goto fail;
avi->movi_list = avio_tell(pb) - 4;
- avi->movi_end = avio_size(pb);
+ avi->movi_end = avi->fsize;
goto end_of_header;
}
/* skip tag */
if (!avi->index_loaded && pb->seekable)
avi_load_index(s);
- avi->index_loaded = 1;
+ calculate_bitrate(s);
+ avi->index_loaded |= 1;
- avi->non_interleaved |= guess_ni_flag(s) | (s->flags & AVFMT_FLAG_SORT_DTS);
+
+ if ((ret = guess_ni_flag(s)) < 0)
+ return ret;
+
- avi->non_interleaved |= ret;
++ avi->non_interleaved |= ret | (s->flags & AVFMT_FLAG_SORT_DTS);
+
+ dict_entry = av_dict_get(s->metadata, "ISFT", NULL, 0);
+ if (dict_entry && !strcmp(dict_entry->value, "PotEncoder"))
+ for (i = 0; i < s->nb_streams; i++) {
+ AVStream *st = s->streams[i];
+ if ( st->codec->codec_id == AV_CODEC_ID_MPEG1VIDEO
+ || st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO)
+ st->need_parsing = AVSTREAM_PARSE_FULL;
+ }
+
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
if (st->nb_index_entries)
break;
}
+ // DV-in-AVI cannot be non-interleaved, if set this must be
+ // a mis-detection.
+ if (avi->dv_demux)
+ avi->non_interleaved = 0;
if (i == s->nb_streams && avi->non_interleaved) {
av_log(s, AV_LOG_WARNING,
"Non-interleaved AVI without index, switching to interleaved\n");
static int read_gab2_sub(AVStream *st, AVPacket *pkt)
{
if (pkt->size >= 7 &&
+ pkt->size < INT_MAX - AVPROBE_PADDING_SIZE &&
!strcmp(pkt->data, "GAB2") && AV_RL16(pkt->data + 5) == 2) {
uint8_t desc[256];
int score = AVPROBE_SCORE_EXTENSION, ret;
AVIStream *ast = st->priv_data;
AVInputFormat *sub_demuxer;
AVRational time_base;
+ int size;
AVIOContext *pb = avio_alloc_context(pkt->data + 7,
pkt->size - 7,
0, NULL, NULL, NULL, NULL);
avio_rl16(pb); /* flags? */
avio_rl32(pb); /* data size */
- pd = (AVProbeData) { .buf = pb->buf_ptr,
- .buf_size = pb->buf_end - pb->buf_ptr };
- if (!(sub_demuxer = av_probe_input_format2(&pd, 1, &score)))
+ size = pb->buf_end - pb->buf_ptr;
+ pd = (AVProbeData) { .buf = av_mallocz(size + AVPROBE_PADDING_SIZE),
+ .buf_size = size };
+ if (!pd.buf)
+ goto error;
+ memcpy(pd.buf, pb->buf_ptr, size);
+ sub_demuxer = av_probe_input_format2(&pd, 1, &score);
+ av_freep(&pd.buf);
+ if (!sub_demuxer)
goto error;
if (!(ast->sub_ctx = avformat_alloc_context()))
return sub_st;
}
-static int get_stream_idx(int *d)
+static int get_stream_idx(unsigned *d)
{
if (d[0] >= '0' && d[0] <= '9' &&
d[1] >= '0' && d[1] <= '9') {
}
}
+/**
+ *
+ * @param exit_early set to 1 to just gather packet position without making the changes needed to actually read & return the packet
+ */
static int avi_sync(AVFormatContext *s, int exit_early)
{
AVIContext *avi = s->priv_data;
start_sync:
memset(d, -1, sizeof(d));
- for (i = sync = avio_tell(pb); !pb->eof_reached; i++) {
+ for (i = sync = avio_tell(pb); !url_feof(pb); i++) {
int j;
for (j = 0; j < 7; j++)
n = get_stream_idx(d + 2);
av_dlog(s, "%X %X %X %X %X %X %X %X %"PRId64" %u %d\n",
d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], i, size, n);
- if (i + (uint64_t)size > avi->fsize || d[0] > 127)
+ if (i*(avi->io_fsize>0) + (uint64_t)size > avi->fsize || d[0] > 127)
continue;
// parse ix##
st = s->streams[n];
ast = st->priv_data;
+ if (!ast) {
+ av_log(s, AV_LOG_WARNING, "Skiping foreign stream %d packet\n", n);
+ continue;
+ }
+
if (s->nb_streams >= 2) {
AVStream *st1 = s->streams[1];
AVIStream *ast1 = st1->priv_data;
// workaround for broken small-file-bug402.avi
- if (d[2] == 'w' && d[3] == 'b' && n == 0 &&
- st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
- st1->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
- ast->prefix == 'd' * 256 + 'c' &&
- (d[2] * 256 + d[3] == ast1->prefix ||
- !ast1->prefix_count)) {
+ if ( d[2] == 'w' && d[3] == 'b'
+ && n == 0
+ && st ->codec->codec_type == AVMEDIA_TYPE_VIDEO
+ && st1->codec->codec_type == AVMEDIA_TYPE_AUDIO
+ && ast->prefix == 'd'*256+'c'
+ && (d[2]*256+d[3] == ast1->prefix || !ast1->prefix_count)
+ ) {
n = 1;
st = st1;
ast = ast1;
|| st->discard >= AVDISCARD_ALL)) {
if (!exit_early) {
ast->frame_offset += get_duration(ast, size);
+ avio_skip(pb, size);
+ goto start_sync;
}
- avio_skip(pb, size);
- goto start_sync;
}
if (d[2] == 'p' && d[3] == 'c' && size <= 4 * 256 + 4) {
// b + (g << 8) + (r << 16);
for (; k <= last; k++)
- ast->pal[k] = avio_rb32(pb) >> 8;
+ ast->pal[k] = 0xFFU<<24 | avio_rb32(pb)>>8;
ast->has_pal = 1;
goto start_sync;
}
}
+ if (pb->error)
+ return pb->error;
return AVERROR_EOF;
}
return AVERROR_EOF;
best_ast = best_st->priv_data;
- best_ts = av_rescale_q(best_ts,
- (AVRational) { FFMAX(1, best_ast->sample_size),
- AV_TIME_BASE },
- best_st->time_base);
+ best_ts = best_ast->frame_offset;
if (best_ast->remaining) {
i = av_index_search_timestamp(best_st,
best_ts,
if (i >= 0) {
int64_t pos = best_st->index_entries[i].pos;
pos += best_ast->packet_size - best_ast->remaining;
- avio_seek(s->pb, pos + 8, SEEK_SET);
+ if (avio_seek(s->pb, pos + 8, SEEK_SET) < 0)
+ return AVERROR_EOF;
- assert(best_ast->remaining <= best_ast->packet_size);
+ av_assert0(best_ast->remaining <= best_ast->packet_size);
avi->stream_index = best_stream_index;
if (!best_ast->remaining)
best_ast->packet_size =
best_ast->remaining = best_st->index_entries[i].size;
}
+ else
+ return AVERROR_EOF;
}
resync:
err = av_get_packet(pb, pkt, size);
if (err < 0)
return err;
+ size = err;
- if (ast->has_pal && pkt->data && pkt->size < (unsigned)INT_MAX / 2) {
+ if (ast->has_pal && pkt->size < (unsigned)INT_MAX / 2) {
uint8_t *pal;
pal = av_packet_new_side_data(pkt,
AV_PKT_DATA_PALETTE,
FF_ENABLE_DEPRECATION_WARNINGS
#endif
size = avpriv_dv_produce_packet(avi->dv_demux, pkt,
- pkt->data, pkt->size);
+ pkt->data, pkt->size, pkt->pos);
#if FF_API_DESTRUCT_PACKET
FF_DISABLE_DEPRECATION_WARNINGS
pkt->destruct = dstr;
size);
pkt->stream_index = avi->stream_index;
- if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+ if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->index_entries) {
AVIndexEntry *e;
int index;
- assert(st->index_entries);
index = av_index_search_timestamp(st, ast->frame_offset, 0);
e = &st->index_entries[index];
- if (index >= 0 && e->timestamp == ast->frame_offset)
+ if (index >= 0 && e->timestamp == ast->frame_offset) {
+ if (index == st->nb_index_entries-1) {
+ int key=1;
+ int i;
+ uint32_t state=-1;
+ for (i=0; i<FFMIN(size,256); i++) {
+ if (st->codec->codec_id == AV_CODEC_ID_MPEG4) {
+ if (state == 0x1B6) {
+ key= !(pkt->data[i]&0xC0);
+ break;
+ }
+ }else
+ break;
+ state= (state<<8) + pkt->data[i];
+ }
+ if (!key)
+ e->flags &= ~AVINDEX_KEYFRAME;
+ }
if (e->flags & AVINDEX_KEYFRAME)
pkt->flags |= AV_PKT_FLAG_KEY;
+ }
} else {
pkt->flags |= AV_PKT_FLAG_KEY;
}
ast->packet_size = 0;
}
+ if (!avi->non_interleaved && pkt->pos >= 0 && ast->seek_pos > pkt->pos) {
+ av_free_packet(pkt);
+ goto resync;
+ }
+ ast->seek_pos= 0;
+
+ if (!avi->non_interleaved && st->nb_index_entries>1 && avi->index_loaded>1) {
+ int64_t dts= av_rescale_q(pkt->dts, st->time_base, AV_TIME_BASE_Q);
+
+ if (avi->dts_max - dts > 2*AV_TIME_BASE) {
+ avi->non_interleaved= 1;
+ av_log(s, AV_LOG_INFO, "Switching to NI mode, due to poor interleaving\n");
+ }else if (avi->dts_max < dts)
+ avi->dts_max = dts;
+ }
+
return 0;
}
AVIStream *ast;
unsigned int index, tag, flags, pos, len, first_packet = 1;
unsigned last_pos = -1;
+ unsigned last_idx = -1;
int64_t idx1_pos, first_packet_pos = 0, data_offset = 0;
+ int anykey = 0;
nb_index_entries = size / 16;
if (nb_index_entries <= 0)
avi->stream_index = -1;
avio_seek(pb, idx1_pos, SEEK_SET);
+ if (s->nb_streams == 1 && s->streams[0]->codec->codec_tag == AV_RL32("MMES")) {
+ first_packet_pos = 0;
+ data_offset = avi->movi_list;
+ }
+
/* Read the entries and sort them in each stream component. */
for (i = 0; i < nb_index_entries; i++) {
+ if (url_feof(pb))
+ return -1;
+
tag = avio_rl32(pb);
flags = avio_rl32(pb);
pos = avio_rl32(pb);
st = s->streams[index];
ast = st->priv_data;
- if (first_packet && first_packet_pos && len) {
+ if (first_packet && first_packet_pos) {
data_offset = first_packet_pos - pos;
first_packet = 0;
}
av_dlog(s, "%d cum_len=%"PRId64"\n", len, ast->cum_len);
- if (pb->eof_reached)
- return AVERROR_INVALIDDATA;
-
+ // even if we have only a single stream, we should
+ // switch to non-interleaved to get correct timestamps
if (last_pos == pos)
avi->non_interleaved = 1;
- else if (len || !ast->sample_size)
+ if (last_idx != pos && len) {
av_add_index_entry(st, pos, ast->cum_len, len, 0,
(flags & AVIIF_INDEX) ? AVINDEX_KEYFRAME : 0);
+ last_idx= pos;
+ }
ast->cum_len += get_duration(ast, len);
last_pos = pos;
+ anykey |= flags&AVIIF_INDEX;
+ }
+ if (!anykey) {
+ for (index = 0; index < s->nb_streams; index++) {
+ st = s->streams[index];
+ if (st->nb_index_entries)
+ st->index_entries[0].flags |= AVINDEX_KEYFRAME;
+ }
}
return 0;
}
-
+ /* Scan the index and consider any file with streams more than
+ * 2 seconds or 64MB apart non-interleaved. */
+ static int check_stream_max_drift(AVFormatContext *s)
+ {
+ int64_t min_pos, pos;
+ int i;
+ int *idx = av_mallocz_array(s->nb_streams, sizeof(*idx));
+ if (!idx)
+ return AVERROR(ENOMEM);
+ for (min_pos = pos = 0; min_pos != INT64_MAX; pos = min_pos + 1LU) {
+ int64_t max_dts = INT64_MIN / 2;
+ int64_t min_dts = INT64_MAX / 2;
+ int64_t max_buffer = 0;
+
+ min_pos = INT64_MAX;
+
+ for (i = 0; i < s->nb_streams; i++) {
+ AVStream *st = s->streams[i];
+ AVIStream *ast = st->priv_data;
+ int n = st->nb_index_entries;
+ while (idx[i] < n && st->index_entries[idx[i]].pos < pos)
+ idx[i]++;
+ if (idx[i] < n) {
+ int64_t dts;
+ dts = av_rescale_q(st->index_entries[idx[i]].timestamp /
+ FFMAX(ast->sample_size, 1),
+ st->time_base, AV_TIME_BASE_Q);
+ min_dts = FFMIN(min_dts, dts);
+ min_pos = FFMIN(min_pos, st->index_entries[idx[i]].pos);
+ }
+ }
+ for (i = 0; i < s->nb_streams; i++) {
+ AVStream *st = s->streams[i];
+ AVIStream *ast = st->priv_data;
+
+ if (idx[i] && min_dts != INT64_MAX / 2) {
+ int64_t dts;
+ dts = av_rescale_q(st->index_entries[idx[i] - 1].timestamp /
+ FFMAX(ast->sample_size, 1),
+ st->time_base, AV_TIME_BASE_Q);
+ max_dts = FFMAX(max_dts, dts);
+ max_buffer = FFMAX(max_buffer,
+ av_rescale(dts - min_dts,
+ st->codec->bit_rate,
+ AV_TIME_BASE));
+ }
+ }
+ if (max_dts - min_dts > 2 * AV_TIME_BASE ||
+ max_buffer > 1024 * 1024 * 8 * 8) {
+ av_free(idx);
+ return 1;
+ }
+ }
+ av_free(idx);
+ return 0;
+ }
+
static int guess_ni_flag(AVFormatContext *s)
{
int i;
int64_t last_start = 0;
int64_t first_end = INT64_MAX;
int64_t oldpos = avio_tell(s->pb);
- int *idx;
+ int64_t min_pos, pos;
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
first_end = st->index_entries[n - 1].pos;
}
avio_seek(s->pb, oldpos, SEEK_SET);
+
if (last_start > first_end)
return 1;
- idx= av_calloc(s->nb_streams, sizeof(*idx));
- if (!idx)
- return 0;
- for (min_pos=pos=0; min_pos!=INT64_MAX; pos= min_pos+1LU) {
- int64_t max_dts = INT64_MIN/2, min_dts= INT64_MAX/2;
- int64_t max_buffer = 0;
- min_pos = INT64_MAX;
- for (i=0; i<s->nb_streams; i++) {
- AVStream *st = s->streams[i];
- AVIStream *ast = st->priv_data;
- int n= st->nb_index_entries;
- while (idx[i]<n && st->index_entries[idx[i]].pos < pos)
- idx[i]++;
- if (idx[i] < n) {
- min_dts = FFMIN(min_dts, av_rescale_q(st->index_entries[idx[i]].timestamp/FFMAX(ast->sample_size, 1), st->time_base, AV_TIME_BASE_Q));
- min_pos = FFMIN(min_pos, st->index_entries[idx[i]].pos);
- }
- }
- for (i=0; i<s->nb_streams; i++) {
- AVStream *st = s->streams[i];
- AVIStream *ast = st->priv_data;
-
- if (idx[i] && min_dts != INT64_MAX/2) {
- int64_t dts = av_rescale_q(st->index_entries[idx[i]-1].timestamp/FFMAX(ast->sample_size, 1), st->time_base, AV_TIME_BASE_Q);
- max_dts = FFMAX(max_dts, dts);
- max_buffer = FFMAX(max_buffer, av_rescale(dts - min_dts, st->codec->bit_rate, AV_TIME_BASE));
- }
- }
- if (max_dts - min_dts > 2*AV_TIME_BASE ||
- max_buffer > 1024 * 1024 * 8 *8
- ) {
- av_free(idx);
- return 1;
- }
- }
- av_free(idx);
- return 0;
+ return check_stream_max_drift(s);
}
static int avi_load_index(AVFormatContext *s)
AVIOContext *pb = s->pb;
uint32_t tag, size;
int64_t pos = avio_tell(pb);
+ int64_t next;
int ret = -1;
if (avio_seek(pb, avi->movi_end, SEEK_SET) < 0)
goto the_end; // maybe truncated file
av_dlog(s, "movi_end=0x%"PRIx64"\n", avi->movi_end);
for (;;) {
- if (pb->eof_reached)
- break;
tag = avio_rl32(pb);
size = avio_rl32(pb);
+ if (url_feof(pb))
+ break;
+ next = avio_tell(pb) + size + (size & 1);
+
av_dlog(s, "tag=%c%c%c%c size=0x%x\n",
tag & 0xff,
(tag >> 8) & 0xff,
if (tag == MKTAG('i', 'd', 'x', '1') &&
avi_read_idx1(s, size) >= 0) {
+ avi->index_loaded=2;
ret = 0;
+ }else if (tag == MKTAG('L', 'I', 'S', 'T')) {
+ uint32_t tag1 = avio_rl32(pb);
+
+ if (tag1 == MKTAG('I', 'N', 'F', 'O'))
+ ff_read_riff_info(s, size - 4);
+ }else if (!ret)
break;
- }
- size += (size & 1);
- if (avio_skip(pb, size) < 0)
+ if (avio_seek(pb, next, SEEK_SET) < 0)
break; // something is wrong here
}
AVIContext *avi = s->priv_data;
AVStream *st;
int i, index;
- int64_t pos;
+ int64_t pos, pos_min;
AVIStream *ast;
/* Does not matter which stream is requested dv in avi has the
if (!avi->index_loaded) {
/* we only load the index on demand */
avi_load_index(s);
- avi->index_loaded = 1;
+ avi->index_loaded |= 1;
}
+ av_assert0(stream_index >= 0);
st = s->streams[stream_index];
ast = st->priv_data;
index = av_index_search_timestamp(st,
timestamp * FFMAX(ast->sample_size, 1),
flags);
- if (index < 0)
+ if (index < 0) {
+ if (st->nb_index_entries > 0)
+ av_log(s, AV_LOG_DEBUG, "Failed to find timestamp %"PRId64 " in index %"PRId64 " .. %"PRId64 "\n",
+ timestamp * FFMAX(ast->sample_size, 1),
+ st->index_entries[0].timestamp,
+ st->index_entries[st->nb_index_entries - 1].timestamp);
return AVERROR_INVALIDDATA;
+ }
/* find the position */
pos = st->index_entries[index].pos;
/* offsets. Calling with other stream indexes should have failed */
/* the av_index_search_timestamp call above. */
+ if (avio_seek(s->pb, pos, SEEK_SET) < 0)
+ return -1;
+
/* Feed the DV video stream version of the timestamp to the */
/* DV demux so it can synthesize correct timestamps. */
ff_dv_offset_reset(avi->dv_demux, timestamp);
- avio_seek(s->pb, pos, SEEK_SET);
avi->stream_index = -1;
return 0;
}
+ pos_min = pos;
for (i = 0; i < s->nb_streams; i++) {
AVStream *st2 = s->streams[i];
AVIStream *ast2 = st2->priv_data;
if (st2->nb_index_entries <= 0)
continue;
-// assert(st2->codec->block_align);
- assert((int64_t)st2->time_base.num * ast2->rate ==
- (int64_t)st2->time_base.den * ast2->scale);
+// av_assert1(st2->codec->block_align);
+ av_assert0((int64_t)st2->time_base.num * ast2->rate ==
+ (int64_t)st2->time_base.den * ast2->scale);
index = av_index_search_timestamp(st2,
av_rescale_q(timestamp,
st->time_base,
st2->time_base) *
FFMAX(ast2->sample_size, 1),
- flags | AVSEEK_FLAG_BACKWARD);
+ flags |
+ AVSEEK_FLAG_BACKWARD |
+ (st2->codec->codec_type != AVMEDIA_TYPE_VIDEO ? AVSEEK_FLAG_ANY : 0));
if (index < 0)
index = 0;
+ ast2->seek_pos = st2->index_entries[index].pos;
+ pos_min = FFMIN(pos_min,ast2->seek_pos);
+ }
+ for (i = 0; i < s->nb_streams; i++) {
+ AVStream *st2 = s->streams[i];
+ AVIStream *ast2 = st2->priv_data;
- if (!avi->non_interleaved) {
- while (index > 0 && st2->index_entries[index].pos > pos)
- index--;
- while (index + 1 < st2->nb_index_entries &&
- st2->index_entries[index].pos < pos)
- index++;
- }
+ if (ast2->sub_ctx || st2->nb_index_entries <= 0)
+ continue;
- av_dlog(s, "%"PRId64" %d %"PRId64"\n",
- timestamp, index, st2->index_entries[index].timestamp);
- /* extract the current frame number */
+ index = av_index_search_timestamp(
+ st2,
+ av_rescale_q(timestamp, st->time_base, st2->time_base) * FFMAX(ast2->sample_size, 1),
+ flags | AVSEEK_FLAG_BACKWARD | (st2->codec->codec_type != AVMEDIA_TYPE_VIDEO ? AVSEEK_FLAG_ANY : 0));
+ if (index < 0)
+ index = 0;
+ while (!avi->non_interleaved && index>0 && st2->index_entries[index-1].pos >= pos_min)
+ index--;
ast2->frame_offset = st2->index_entries[index].timestamp;
}
/* do the seek */
- avio_seek(s->pb, pos, SEEK_SET);
+ if (avio_seek(s->pb, pos_min, SEEK_SET) < 0) {
+ av_log(s, AV_LOG_ERROR, "Seek failed\n");
+ return -1;
+ }
avi->stream_index = -1;
+ avi->dts_max = INT_MIN;
return 0;
}
.read_packet = avi_read_packet,
.read_close = avi_read_close,
.read_seek = avi_read_seek,
+ .priv_class = &demuxer_class,
};
projects / ffmpeg / commitdiff