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Make the AAC (and ALAC) codec more flexible when dealing with the MP4 file structure. Should fix some podcasts that don't play.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11680 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Magnus Holmgren 2006-12-06 21:37:36 +00:00
parent b774bae5fd
commit 7aab5302ac
1 changed files with 33 additions and 32 deletions
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55
apps/codecs/libm4a/demux.c
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@ -525,8 +525,8 @@ static bool read_chunk_stbl(qtmovie_t *qtmovie, size_t chunk_len)
}
break;
default:
DEBUGF("(stbl) unknown chunk id: %c%c%c%c\n",
SPLITFOURCC(sub_chunk_id));
/*DEBUGF("(stbl) unknown chunk id: %c%c%c%c\n",
SPLITFOURCC(sub_chunk_id));*/
stream_skip(qtmovie->stream, sub_chunk_len - 8);
}
@ -537,57 +537,58 @@ static bool read_chunk_stbl(qtmovie_t *qtmovie, size_t chunk_len)
static bool read_chunk_minf(qtmovie_t *qtmovie, size_t chunk_len)
{
size_t dinf_size, stbl_size;
size_t size_remaining = chunk_len - 8;
uint32_t i;
/**** SOUND HEADER CHUNK ****/
/* Check for smhd, only kind of minf we care about */
if ((i = stream_read_uint32(qtmovie->stream)) != 16)
{
DEBUGF("unexpected size in media info: %d\n",i);
stream_skip(qtmovie->stream, size_remaining-4);
return true;
}
if (stream_read_uint32(qtmovie->stream) != MAKEFOURCC('s','m','h','d'))
{
DEBUGF("not a sound header! can't handle this.\n");
return false;
}
/* now skip the rest */
/* now skip the rest of the atom */
stream_skip(qtmovie->stream, 16 - 8);
size_remaining -= 16;
/****/
/**** DINF CHUNK ****/
dinf_size = stream_read_uint32(qtmovie->stream);
if (stream_read_uint32(qtmovie->stream) != MAKEFOURCC('d','i','n','f'))
while (size_remaining)
{
DEBUGF("expected dinf, didn't get it.\n");
return false;
}
/* skip it */
stream_skip(qtmovie->stream, dinf_size - 8);
size_remaining -= dinf_size;
/****/
size_t sub_chunk_len;
fourcc_t sub_chunk_id;
sub_chunk_len = stream_read_uint32(qtmovie->stream);
/**** SAMPLE TABLE ****/
stbl_size = stream_read_uint32(qtmovie->stream);
if (stream_read_uint32(qtmovie->stream) != MAKEFOURCC('s','t','b','l'))
if (sub_chunk_len <= 1 || sub_chunk_len > size_remaining)
{
DEBUGF("expected stbl, didn't get it.\n");
return false;
}
if (!read_chunk_stbl(qtmovie, stbl_size)) {
DEBUGF("strange size (%u) for chunk inside minf\n", sub_chunk_len);
return false;
}
size_remaining -= stbl_size;
sub_chunk_id = stream_read_uint32(qtmovie->stream);
if (size_remaining)
switch (sub_chunk_id)
{
DEBUGF("oops\n");
stream_skip(qtmovie->stream, size_remaining);
case MAKEFOURCC('s','t','b','l'):
if (!read_chunk_stbl(qtmovie, sub_chunk_len)) {
return false;
}
break;
default:
/*DEBUGF("(minf) unknown chunk id: %c%c%c%c\n",
SPLITFOURCC(sub_chunk_id));*/
stream_skip(qtmovie->stream, sub_chunk_len - 8);
break;
}
size_remaining -= sub_chunk_len;
}
return true;
}