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qtdemux: Check sample count is valid in PIFF parsing

Browse source 
The value stored in cenc_aux_sample_count wasn't in sync with the
parsing code that followed which checks whether all entries are
valid and present.

Only write the actual sample count when we know for sure.

CID #1427087
This commit is contained in:
Edward Hervey 2018-03-22 15:20:47 +01:00 committed by Edward Hervey
parent 56a1eb65e2
commit 60bc77cc35
1 changed files with 10 additions and 3 deletions
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13
gst/isomp4/qtdemux.c
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@ -2675,6 +2675,7 @@ qtdemux_parse_piff (GstQTDemux * qtdemux, const guint8 * buffer, gint length,
QtDemuxCencSampleSetInfo *ss_info = NULL;
const gchar *system_id;
gboolean uses_sub_sample_encryption = FALSE;
guint32 sample_count;
if (qtdemux->n_streams == 0)
return;
@ -2770,16 +2771,16 @@ qtdemux_parse_piff (GstQTDemux * qtdemux, const guint8 * buffer, gint length,
uses_sub_sample_encryption = TRUE;
}
if (!gst_byte_reader_get_uint32_be (&br, &qtdemux->cenc_aux_sample_count)) {
if (!gst_byte_reader_get_uint32_be (&br, &sample_count)) {
GST_ERROR_OBJECT (qtdemux, "Error getting box's sample count field");
return;
}
ss_info->crypto_info =
g_ptr_array_new_full (qtdemux->cenc_aux_sample_count,
g_ptr_array_new_full (sample_count,
(GDestroyNotify) qtdemux_gst_structure_free);
for (i = 0; i < qtdemux->cenc_aux_sample_count; ++i) {
for (i = 0; i < sample_count; ++i) {
GstStructure *properties;
guint8 *data;
GstBuffer *buf;
@ -2787,12 +2788,14 @@ qtdemux_parse_piff (GstQTDemux * qtdemux, const guint8 * buffer, gint length,
properties = qtdemux_get_cenc_sample_properties (qtdemux, stream, i);
if (properties == NULL) {
GST_ERROR_OBJECT (qtdemux, "failed to get properties for sample %u", i);
qtdemux->cenc_aux_sample_count = i;
return;
}
if (!gst_byte_reader_dup_data (&br, iv_size, &data)) {
GST_ERROR_OBJECT (qtdemux, "IV data not present for sample %u", i);
gst_structure_free (properties);
qtdemux->cenc_aux_sample_count = i;
return;
}
buf = gst_buffer_new_wrapped (data, iv_size);
@ -2807,6 +2810,7 @@ qtdemux_parse_piff (GstQTDemux * qtdemux, const guint8 * buffer, gint length,
GST_ERROR_OBJECT (qtdemux,
"failed to get subsample count for sample %u", i);
gst_structure_free (properties);
qtdemux->cenc_aux_sample_count = i;
return;
}
GST_LOG_OBJECT (qtdemux, "subsample count: %u", n_subsamples);
@ -2814,6 +2818,7 @@ qtdemux_parse_piff (GstQTDemux * qtdemux, const guint8 * buffer, gint length,
GST_ERROR_OBJECT (qtdemux, "failed to get subsample data for sample %u",
i);
gst_structure_free (properties);
qtdemux->cenc_aux_sample_count = i;
return;
}
buf = gst_buffer_new_wrapped (data, n_subsamples * 6);
@ -2827,6 +2832,8 @@ qtdemux_parse_piff (GstQTDemux * qtdemux, const guint8 * buffer, gint length,
g_ptr_array_add (ss_info->crypto_info, properties);
}
qtdemux->cenc_aux_sample_count = sample_count;
}
static void