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support files with COMM chunk after SSND, fix invalid_nocommon.aiff which is spec compliant

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Originally committed as revision 9428 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2007-06-25 21:31:33 +00:00
parent 05d00e953f
commit 620d1d7878
1 changed files with 14 additions and 3 deletions
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17
libavformat/aiff.c
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@ -289,7 +289,8 @@ static int aiff_probe(AVProbeData *p)
static int aiff_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
int size, filesize, offset;
int size, filesize;
offset_t offset = 0;
uint32_t tag;
unsigned version = AIFF_C_VERSION1;
ByteIOContext *pb = &s->pb;
@ -327,6 +328,8 @@ static int aiff_read_header(AVFormatContext *s,
st->nb_frames = get_aiff_header (pb, st->codec, size, version);
if (st->nb_frames < 0)
return st->nb_frames;
if (offset > 0) // COMM is after SSND
goto got_sound;
break;
case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */
@ -352,7 +355,15 @@ static int aiff_read_header(AVFormatContext *s,
case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */
get_be32(pb); /* Block align... don't care */
offset = get_be32(pb); /* Offset of sound data */
goto got_sound;
offset += url_ftell(pb); /* Compute absolute data offset */
if (st->codec->codec_id) /* Assume COMM already parsed */
goto got_sound;
if (url_is_streamed(pb)) {
av_log(s, AV_LOG_ERROR, "file is not seekable\n");
return -1;
}
url_fskip(pb, size - 8);
break;
default: /* Jump */
if (size & 1) /* Always even aligned */
@ -374,7 +385,7 @@ got_sound:
st->duration = st->nb_frames;
/* Position the stream at the first block */
url_fskip(pb, offset);
url_fseek(pb, offset, SEEK_SET);
return 0;
}