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qtdemux: use GstByteReader when parsing tkhd atom

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This commit is contained in:
Tim-Philipp Müller 2009-08-20 01:21:04 +01:00
parent 6b7f4f5e23
commit a16feec38e
1 changed files with 16 additions and 9 deletions
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25
gst/qtdemux/qtdemux.c
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@ -4065,8 +4065,8 @@ done:
static gboolean
qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
{
QtAtomParser tkhd;
int offset;
GNode *tkhd;
GNode *mdia;
GNode *mdhd;
GNode *hdlr;
@ -4083,6 +4083,8 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
gchar *codec = NULL;
const guint8 *stsd_data;
guint32 version;
guint32 tkhd_flags;
guint8 tkhd_version;
stream = g_new0 (QtDemuxStream, 1);
/* new streams always need a discont */
@ -4094,11 +4096,13 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
stream->sample_index = -1;
stream->last_ret = GST_FLOW_OK;
if (!(tkhd = qtdemux_tree_get_child_by_type (trak, FOURCC_tkhd)))
if (!qtdemux_tree_get_child_by_type_full (trak, FOURCC_tkhd, &tkhd) ||
!qt_atom_parser_get_uint8 (&tkhd, &tkhd_version) ||
!qt_atom_parser_get_uint24 (&tkhd, &tkhd_flags))
goto corrupt_file;
GST_LOG_OBJECT (qtdemux, "track[tkhd] version/flags: 0x%08x",
QT_UINT32 ((guint8 *) tkhd->data + 8));
GST_LOG_OBJECT (qtdemux, "track[tkhd] version/flags: 0x%02x/%06x",
tkhd_version, tkhd_flags);
if (!(mdia = qtdemux_tree_get_child_by_type (trak, FOURCC_mdia)))
goto corrupt_file;
@ -4173,15 +4177,18 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
stsd_data = (const guint8 *) stsd->data;
if (stream->subtype == FOURCC_vide) {
guint32 fourcc;
const guint8 *tkhd_data = (const guint8 *) tkhd->data;
guint32 w, h, fourcc;
stream->sampled = TRUE;
/* version 1 uses some 64-bit ints */
offset = (QT_UINT8 (tkhd_data + 8) == 1) ? 96 : 84;
stream->display_width = (guint) QT_FP32 (tkhd_data + offset);
stream->display_height = (guint) QT_FP32 (tkhd_data + offset + 4);
if (!qt_atom_parser_skip (&tkhd, (tkhd_version == 1) ? 84 : 72) ||
!qt_atom_parser_get_uint32 (&tkhd, &w) ||
!qt_atom_parser_get_uint32 (&tkhd, &h))
goto corrupt_file;
stream->display_width = w >> 16;
stream->display_height = h >> 16;
offset = 16;
stream->fourcc = fourcc = QT_FOURCC (stsd_data + offset + 4);