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path: root/contrib/ffmpeg/libavformat/avidec.c
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Diffstat (limited to 'contrib/ffmpeg/libavformat/avidec.c')
-rw-r--r--contrib/ffmpeg/libavformat/avidec.c123
1 files changed, 76 insertions, 47 deletions
diff --git a/contrib/ffmpeg/libavformat/avidec.c b/contrib/ffmpeg/libavformat/avidec.c
index d1af79fa3..23c130ab7 100644
--- a/contrib/ffmpeg/libavformat/avidec.c
+++ b/contrib/ffmpeg/libavformat/avidec.c
@@ -82,6 +82,9 @@ static int get_riff(AVIContext *avi, ByteIOContext *pb)
avi->riff_end = get_le32(pb); /* RIFF chunk size */
avi->riff_end += url_ftell(pb); /* RIFF chunk end */
tag = get_le32(pb);
+ if(tag == MKTAG('A', 'V', 'I', 0x19))
+ av_log(NULL, AV_LOG_INFO, "file has been generated with a totally broken muxer\n");
+ else
if (tag != MKTAG('A', 'V', 'I', ' ') && tag != MKTAG('A', 'V', 'I', 'X'))
return -1;
@@ -213,7 +216,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
uint32_t tag, tag1, handler;
int codec_type, stream_index, frame_period, bit_rate;
unsigned int size, nb_frames;
- int i, n;
+ int i;
AVStream *st;
AVIStream *ast = NULL;
char str_track[4];
@@ -266,10 +269,22 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
avi->non_interleaved |= get_le32(pb) & AVIF_MUSTUSEINDEX;
url_fskip(pb, 2 * 4);
- n = get_le32(pb);
- for(i=0;i<n;i++) {
- AVIStream *ast;
- st = av_new_stream(s, i);
+ get_le32(pb);
+
+ url_fskip(pb, size - 7 * 4);
+ break;
+ case MKTAG('s', 't', 'r', 'h'):
+ /* stream header */
+
+ tag1 = get_le32(pb);
+ handler = get_le32(pb); /* codec tag */
+
+ if(tag1 == MKTAG('p', 'a', 'd', 's')){
+ url_fskip(pb, size - 8);
+ break;
+ }else{
+ stream_index++;
+ st = av_new_stream(s, stream_index);
if (!st)
goto fail;
@@ -278,17 +293,13 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
goto fail;
st->priv_data = ast;
}
- url_fskip(pb, size - 7 * 4);
- break;
- case MKTAG('s', 't', 'r', 'h'):
- /* stream header */
- stream_index++;
- tag1 = get_le32(pb);
- handler = get_le32(pb); /* codec tag */
+
#ifdef DEBUG
print_tag("strh", tag1, -1);
#endif
if(tag1 == MKTAG('i', 'a', 'v', 's') || tag1 == MKTAG('i', 'v', 'a', 's')){
+ int64_t dv_dur;
+
/*
* After some consideration -- I don't think we
* have to support anything but DV in a type1 AVIs.
@@ -314,20 +325,24 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
url_fskip(pb, 3 * 4);
ast->scale = get_le32(pb);
ast->rate = get_le32(pb);
+ url_fskip(pb, 4); /* start time */
+
+ dv_dur = get_le32(pb);
+ if (ast->scale > 0 && ast->rate > 0 && dv_dur > 0) {
+ dv_dur *= AV_TIME_BASE;
+ s->duration = av_rescale(dv_dur, ast->scale, ast->rate);
+ }
+ /*
+ * else, leave duration alone; timing estimation in utils.c
+ * will make a guess based on bit rate.
+ */
+
stream_index = s->nb_streams - 1;
- url_fskip(pb, size - 7*4);
+ url_fskip(pb, size - 9*4);
break;
}
- if (stream_index >= s->nb_streams) {
- url_fskip(pb, size - 8);
- /* ignore padding stream */
- if (tag1 == MKTAG('p', 'a', 'd', 's'))
- stream_index--;
- break;
- }
- st = s->streams[stream_index];
- ast = st->priv_data;
+ assert(stream_index < s->nb_streams);
st->codec->stream_codec_tag= handler;
get_le32(pb); /* flags */
@@ -370,10 +385,6 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
//FIXME
codec_type = CODEC_TYPE_DATA; //CODEC_TYPE_SUB ? FIXME
break;
- case MKTAG('p', 'a', 'd', 's'):
- codec_type = CODEC_TYPE_UNKNOWN;
- stream_index--;
- break;
default:
av_log(s, AV_LOG_ERROR, "unknown stream type %X\n", tag1);
goto fail;
@@ -383,7 +394,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
break;
case MKTAG('s', 't', 'r', 'f'):
/* stream header */
- if (stream_index >= s->nb_streams || avi->dv_demux) {
+ if (stream_index >= (unsigned)s->nb_streams || avi->dv_demux) {
url_fskip(pb, size);
} else {
st = s->streams[stream_index];
@@ -492,6 +503,13 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
sscanf(str_track, "%d", &s->track);
break;
default:
+ if(size > 1000000){
+ av_log(s, AV_LOG_ERROR, "well something went wrong during header parsing, "
+ "ill ignore it and try to continue anyway\n");
+ avi->movi_list = url_ftell(pb) - 4;
+ avi->movi_end = url_fsize(pb);
+ goto end_of_header;
+ }
/* skip tag */
size += (size & 1);
url_fskip(pb, size);
@@ -612,21 +630,16 @@ resync:
pkt->stream_index = avi->stream_index;
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
- if(st->index_entries){
- AVIndexEntry *e;
- int index;
+ AVIndexEntry *e;
+ int index;
+ assert(st->index_entries);
- index= av_index_search_timestamp(st, pkt->dts, 0);
- e= &st->index_entries[index];
+ index= av_index_search_timestamp(st, pkt->dts, 0);
+ e= &st->index_entries[index];
- if(index >= 0 && e->timestamp == ast->frame_offset){
- if (e->flags & AVINDEX_KEYFRAME)
- pkt->flags |= PKT_FLAG_KEY;
- }
- } else {
- /* if no index, better to say that all frames
- are key frames */
- pkt->flags |= PKT_FLAG_KEY;
+ if(index >= 0 && e->timestamp == ast->frame_offset){
+ if (e->flags & AVINDEX_KEYFRAME)
+ pkt->flags |= PKT_FLAG_KEY;
}
} else {
pkt->flags |= PKT_FLAG_KEY;
@@ -640,10 +653,6 @@ resync:
if(!ast->remaining){
avi->stream_index= -1;
ast->packet_size= 0;
- if (size & 1) {
- get_byte(pb);
- size++;
- }
}
return size;
@@ -725,6 +734,13 @@ resync:
avi->stream_index= n;
ast->packet_size= size + 8;
ast->remaining= size;
+
+ {
+ uint64_t pos= url_ftell(pb) - 8;
+ if(!st->index_entries || !st->nb_index_entries || st->index_entries[st->nb_index_entries - 1].pos < pos){
+ av_add_index_entry(st, pos, ast->frame_offset / FFMAX(1, ast->sample_size), size, 0, AVINDEX_KEYFRAME);
+ }
+ }
goto resync;
}
}
@@ -903,6 +919,21 @@ static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp
// av_log(NULL, AV_LOG_DEBUG, "XX %"PRId64" %d %"PRId64"\n", timestamp, index, st->index_entries[index].timestamp);
+ if (ENABLE_DV_DEMUXER && avi->dv_demux) {
+ /* One and only one real stream for DV in AVI, and it has video */
+ /* offsets. Calling with other stream indices should have failed */
+ /* the av_index_search_timestamp call above. */
+ assert(stream_index == 0);
+
+ /* Feed the DV video stream version of the timestamp to the */
+ /* DV demux so it can synth correct timestamps */
+ dv_offset_reset(avi->dv_demux, timestamp);
+
+ url_fseek(&s->pb, pos, SEEK_SET);
+ avi->stream_index= -1;
+ return 0;
+ }
+
for(i = 0; i < s->nb_streams; i++) {
AVStream *st2 = s->streams[i];
AVIStream *ast2 = st2->priv_data;
@@ -937,8 +968,6 @@ static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp
ast2->frame_offset *=ast2->sample_size;
}
- if (ENABLE_DV_DEMUXER && avi->dv_demux)
- dv_flush_audio_packets(avi->dv_demux);
/* do the seek */
url_fseek(&s->pb, pos, SEEK_SET);
avi->stream_index= -1;
@@ -971,7 +1000,7 @@ static int avi_probe(AVProbeData *p)
if (p->buf[0] == 'R' && p->buf[1] == 'I' &&
p->buf[2] == 'F' && p->buf[3] == 'F' &&
p->buf[8] == 'A' && p->buf[9] == 'V' &&
- p->buf[10] == 'I' && p->buf[11] == ' ')
+ p->buf[10] == 'I' && (p->buf[11] == ' ' || p->buf[11] == 0x19))
return AVPROBE_SCORE_MAX;
else
return 0;
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-26 20:21:53 +0000