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vbr audio fix 

Originally committed as revision 3111 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-05-06 21:52:38 +00:00
parent dd17409ca0
commit 1fa3d65d57
1 changed files with 11 additions and 7 deletions
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18
libavformat/avidec.c
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@ -38,6 +38,7 @@ typedef struct AVIStream {
int scale;
int rate;
int sample_size; /* audio only data */
int start;
int new_frame_offset; /* temporary storage (used during seek) */
int cum_len; /* temporary storage (used during seek) */
@ -232,11 +233,12 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
get_le32(pb); /* initial frame */
ast->scale = get_le32(pb); /* scale */
ast->rate = get_le32(pb);
get_le32(pb); /* start */
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;
if (ast->rate != 0)
st->duration = (int64_t)length * AV_TIME_BASE / ast->rate;
@ -419,10 +421,10 @@ static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
ast = st->priv_data;
/* XXX: how to handle B frames in avi ? */
if(st->codec.codec_type == CODEC_TYPE_VIDEO)
if(ast->sample_size)
pkt->pts = ((int64_t)ast->frame_offset * ast->scale* AV_TIME_BASE) / (ast->rate * ast->sample_size);
else
pkt->pts = ((int64_t)ast->frame_offset * ast->scale* AV_TIME_BASE) / ast->rate;
else //FIXME this is proably not correct for all weird avis
pkt->pts = ((int64_t)ast->frame_offset * ast->scale* AV_TIME_BASE) / (ast->rate * st->codec.block_align);
//printf("%Ld %d %d %d %d\n", pkt->pts, ast->frame_offset, ast->scale, AV_TIME_BASE, ast->rate);
pkt->stream_index = n;
/* FIXME: We really should read index for that */
@ -435,11 +437,13 @@ static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
are key frames */
pkt->flags |= PKT_FLAG_KEY;
}
ast->frame_offset++;
} else {
ast->frame_offset += pkt->size;
pkt->flags |= PKT_FLAG_KEY;
}
if(ast->sample_size)
ast->frame_offset += pkt->size;
else
ast->frame_offset++;
}
return size;
}
@ -634,7 +638,7 @@ static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp
if ((j + 1) < ast->nb_index_entries)
j++;
/* extract the current frame number */
if (st->codec.codec_type == CODEC_TYPE_VIDEO)
if (ast->sample_size==0)
ast->new_frame_offset = j;
else
ast->new_frame_offset = ast->index_entries[j].cum_len;