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authorMichael Niedermayer <michaelni@gmx.at>2005-03-15 21:25:59 +0000
committerMichael Niedermayer <michaelni@gmx.at>2005-03-15 21:25:59 +0000
commitb53f10648bae116ba271ba1d89e24080b2c1a352 (patch)
tree74923e5fd51c4859158facdddcd4d585b97f0148 /libavformat/avidec.c
parentf9e6ebf7f9630bae8ae2c3626029a2f4a2c32354 (diff)
downloadffmpeg-b53f10648bae116ba271ba1d89e24080b2c1a352.tar.gz
cleanup strh parser
Originally committed as revision 4041 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavformat/avidec.c')
-rw-r--r--libavformat/avidec.c121
1 files changed, 45 insertions, 76 deletions
diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index 7ad9c2a0f4..8f40f88fae 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -90,7 +90,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
AVIContext *avi = s->priv_data;
ByteIOContext *pb = &s->pb;
uint32_t tag, tag1, handler;
- int codec_type, stream_index, frame_period, bit_rate, scale, rate;
+ int codec_type, stream_index, frame_period, bit_rate;
unsigned int size, nb_frames;
int i, n;
AVStream *st;
@@ -164,9 +164,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
#ifdef DEBUG
print_tag("strh", tag1, -1);
#endif
- switch(tag1) {
- case MKTAG('i', 'a', 'v', 's'):
- case MKTAG('i', 'v', 'a', 's'):
+ if(tag1 == MKTAG('i', 'a', 'v', 's') || tag1 == MKTAG('i', 'v', 'a', 's')){
/*
* After some consideration -- I don't think we
* have to support anything but DV in a type1 AVIs.
@@ -192,96 +190,67 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
ast->rate = get_le32(pb);
stream_index = s->nb_streams - 1;
url_fskip(pb, size - 7*4);
- break;
+ break;
+ }
+
+ if (stream_index >= s->nb_streams) {
+ url_fskip(pb, size - 8);
+ break;
+ }
+ st = s->streams[stream_index];
+ ast = st->priv_data;
+ st->codec.stream_codec_tag= handler;
+
+ get_le32(pb); /* flags */
+ get_le16(pb); /* priority */
+ get_le16(pb); /* language */
+ get_le32(pb); /* initial frame */
+ ast->scale = get_le32(pb);
+ ast->rate = get_le32(pb);
+ if(ast->scale && ast->rate){
+ }else if(frame_period){
+ ast->rate = 1000000;
+ ast->scale = frame_period;
+ }else{
+ ast->rate = 25;
+ ast->scale = 1;
+ }
+ av_set_pts_info(st, 64, ast->scale, ast->rate);
+
+ ast->start= get_le32(pb); /* start */
+ nb_frames = get_le32(pb);
+
+ st->start_time = 0;
+ st->duration = av_rescale(nb_frames, ast->scale*(int64_t)AV_TIME_BASE, ast->rate);
+ get_le32(pb); /* buffer size */
+ get_le32(pb); /* quality */
+ ast->sample_size = get_le32(pb); /* sample ssize */
+// av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d\n", ast->rate, ast->scale, ast->start, ast->sample_size);
+
+ switch(tag1) {
case MKTAG('v', 'i', 'd', 's'):
codec_type = CODEC_TYPE_VIDEO;
- if (stream_index >= s->nb_streams) {
- url_fskip(pb, size - 8);
- break;
- }
-
- st = s->streams[stream_index];
- ast = st->priv_data;
- st->codec.stream_codec_tag= handler;
-
- get_le32(pb); /* flags */
- get_le16(pb); /* priority */
- get_le16(pb); /* language */
- get_le32(pb); /* XXX: initial frame ? */
- scale = get_le32(pb); /* scale */
- rate = get_le32(pb); /* rate */
-
- if(scale && rate){
- }else if(frame_period){
- rate = 1000000;
- scale = frame_period;
- }else{
- rate = 25;
- scale = 1;
- }
- ast->rate = rate;
- ast->scale = scale;
- av_set_pts_info(st, 64, scale, rate);
- st->codec.frame_rate = rate;
- st->codec.frame_rate_base = scale;
- get_le32(pb); /* start */
- nb_frames = get_le32(pb);
- st->start_time = 0;
- st->duration = av_rescale(nb_frames,
- st->codec.frame_rate_base * (int64_t)AV_TIME_BASE,
- st->codec.frame_rate);
- url_fskip(pb, size - 9 * 4);
+ ast->sample_size = 0;
+ st->codec.frame_rate = ast->rate;
+ st->codec.frame_rate_base = ast->scale;
break;
case MKTAG('a', 'u', 'd', 's'):
- {
- unsigned int length;
-
- codec_type = CODEC_TYPE_AUDIO;
-
- if (stream_index >= s->nb_streams) {
- url_fskip(pb, size - 8);
- break;
- }
- st = s->streams[stream_index];
- ast = st->priv_data;
-
- get_le32(pb); /* flags */
- get_le16(pb); /* priority */
- get_le16(pb); /* language */
- get_le32(pb); /* initial frame */
- ast->scale = get_le32(pb); /* scale */
- ast->rate = get_le32(pb);
- if(!ast->rate)
- ast->rate= 1; //wrong but better then 1/0
- if(!ast->scale)
- ast->scale= 1; //wrong but better then 1/0
- av_set_pts_info(st, 64, ast->scale, ast->rate);
- ast->start= get_le32(pb); /* start */
- length = get_le32(pb); /* length, in samples or bytes */
- get_le32(pb); /* buffer size */
- get_le32(pb); /* quality */
- ast->sample_size = get_le32(pb); /* sample ssize */
-//av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d\n", ast->scale, ast->rate, ast->sample_size, ast->start);
- st->start_time = 0;
- st->duration = av_rescale(length, ast->scale*(int64_t)AV_TIME_BASE, ast->rate);
- url_fskip(pb, size - 12 * 4);
- }
+ codec_type = CODEC_TYPE_AUDIO;
break;
case MKTAG('t', 'x', 't', 's'):
//FIXME
codec_type = CODEC_TYPE_DATA; //CODEC_TYPE_SUB ? FIXME
- url_fskip(pb, size - 8);
break;
case MKTAG('p', 'a', 'd', 's'):
codec_type = CODEC_TYPE_UNKNOWN;
- url_fskip(pb, size - 8);
stream_index--;
break;
default:
av_log(s, AV_LOG_ERROR, "unknown stream type %X\n", tag1);
goto fail;
}
+ url_fskip(pb, size - 12 * 4);
break;
case MKTAG('s', 't', 'r', 'f'):
/* stream header */