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qtdemux: fragmented support; handle ismv stbl atoms

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... or lack of some thereof, such as mandatory stsz.  Shuffle some code
in _stbl_init to detect this early enough.
This commit is contained in:
Mark Nauwelaerts 2010-11-08 11:41:21 +01:00
parent 283e2b1bcd
commit b4fb2ac99c
1 changed files with 29 additions and 28 deletions
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57
gst/qtdemux/qtdemux.c
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@ -5122,6 +5122,23 @@ qtdemux_stbl_init (GstQTDemux * qtdemux, QtDemuxStream * stream, GNode * stbl)
}
}
/* sample size */
if (!qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stsz, &stream->stsz))
goto no_samples;
/* copy atom data into a new buffer for later use */
stream->stsz.data = g_memdup (stream->stsz.data, stream->stsz.size);
/* skip version + flags */
if (!gst_byte_reader_skip (&stream->stsz, 1 + 3) ||
!gst_byte_reader_get_uint32_be (&stream->stsz, &stream->sample_size))
goto corrupt_file;
if (!gst_byte_reader_get_uint32_be (&stream->stsz, &stream->n_samples))
goto corrupt_file;
if (!stream->n_samples)
goto no_samples;
/* sample-to-chunk atom */
if (!qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stsc, &stream->stsc))
@ -5145,19 +5162,6 @@ qtdemux_stbl_init (GstQTDemux * qtdemux, QtDemuxStream * stream, GNode * stbl)
goto corrupt_file;
/* sample size */
if (!qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stsz, &stream->stsz))
goto corrupt_file;
/* copy atom data into a new buffer for later use */
stream->stsz.data = g_memdup (stream->stsz.data, stream->stsz.size);
/* skip version + flags */
if (!gst_byte_reader_skip (&stream->stsz, 1 + 3) ||
!gst_byte_reader_get_uint32_be (&stream->stsz, &stream->sample_size))
goto corrupt_file;
/* chunk offset */
if (qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stco, &stream->stco))
stream->co_size = sizeof (guint32);
@ -5181,9 +5185,6 @@ qtdemux_stbl_init (GstQTDemux * qtdemux, QtDemuxStream * stream, GNode * stbl)
if (!gst_byte_reader_skip (&stream->stco, 4))
goto corrupt_file;
if (!gst_byte_reader_get_uint32_be (&stream->stsz, &stream->n_samples))
goto corrupt_file;
/* make sure there are enough data in the stsz atom */
if (!stream->sample_size) {
/* different sizes for each sample */
@ -5196,18 +5197,6 @@ qtdemux_stbl_init (GstQTDemux * qtdemux, QtDemuxStream * stream, GNode * stbl)
goto corrupt_file;
}
if (!stream->n_samples) {
gst_qtdemux_stbl_free (stream);
if (!qtdemux->fragmented) {
/* not quite good */
GST_WARNING_OBJECT (qtdemux, "stream has no samples");
return FALSE;
} else {
/* may pick up samples elsewhere */
return TRUE;
}
}
GST_DEBUG_OBJECT (qtdemux,
"allocating n_samples %u * %" G_GSIZE_FORMAT " = (%u MB)",
stream->n_samples, sizeof (QtDemuxSample),
@ -5256,6 +5245,18 @@ corrupt_file:
(_("This file is corrupt and cannot be played.")), (NULL));
return FALSE;
}
no_samples:
{
gst_qtdemux_stbl_free (stream);
if (!qtdemux->fragmented) {
/* not quite good */
GST_WARNING_OBJECT (qtdemux, "stream has no samples");
return FALSE;
} else {
/* may pick up samples elsewhere */
return TRUE;
}
}
}
/* collect samples from the next sample to be parsed up to sample @n for @stream