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qtdemux: extract palette data for dvd subpicture streams

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... and send it downstream using custom dvd event
This commit is contained in:
Mark Nauwelaerts 2009-10-08 13:39:25 +02:00
parent b2d70862e8
commit 674b0c4289
1 changed files with 62 additions and 1 deletions
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63
gst/qtdemux/qtdemux.c
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@ -245,6 +245,8 @@ struct _QtDemuxStream
gboolean sent_eos;
GstTagList *pending_tags;
gboolean send_global_tags;
GstEvent *pending_event;
};
enum QtDemuxState
@ -2263,8 +2265,18 @@ gst_qtdemux_process_buffer (GstQTDemux * qtdemux, QtDemuxStream * stream,
size = GST_BUFFER_SIZE (buf);
/* not many cases for now */
if (stream->fourcc != FOURCC_tx3g)
if (G_UNLIKELY (stream->fourcc == FOURCC_mp4s)) {
/* send a one time dvd clut event */
if (stream->pending_event && stream->pad)
gst_pad_push_event (stream->pad, stream->pending_event);
stream->pending_event = NULL;
/* no further processing needed */
stream->need_process = FALSE;
}
if (G_UNLIKELY (stream->fourcc != FOURCC_tx3g)) {
return buf;
}
if (G_LIKELY (size >= 2)) {
nsize = GST_READ_UINT16_BE (data);
@ -4839,6 +4851,55 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
g_free (codec);
codec = NULL;
}
/* hunt for sort-of codec data */
switch (fourcc) {
case FOURCC_mp4s:
{
guint len;
const guint8 *data;
/* look for palette */
/* target mp4s atom */
len = QT_UINT32 (stsd_data + offset);
data = stsd_data + offset;
/* verify sufficient length,
* and esds present with decConfigDescr of expected size and position */
if ((len >= 106 + 8) && (QT_FOURCC (data + 8 + 8 + 4) == FOURCC_esds) &&
(QT_UINT16 (data + 8 + 40) == 0x0540)) {
GstStructure *s;
guint32 clut[16];
gint i;
/* move to decConfigDescr data */
data = data + 8 + 42;
for (i = 0; i < 16; i++) {
clut[i] = QT_UINT32 (data);
data += 4;
}
s = gst_structure_new ("application/x-gst-dvd", "event",
G_TYPE_STRING, "dvd-spu-clut-change",
"clut00", G_TYPE_INT, clut[0], "clut01", G_TYPE_INT, clut[1],
"clut02", G_TYPE_INT, clut[2], "clut03", G_TYPE_INT, clut[3],
"clut04", G_TYPE_INT, clut[4], "clut05", G_TYPE_INT, clut[5],
"clut06", G_TYPE_INT, clut[6], "clut07", G_TYPE_INT, clut[7],
"clut08", G_TYPE_INT, clut[8], "clut09", G_TYPE_INT, clut[9],
"clut10", G_TYPE_INT, clut[10], "clut11", G_TYPE_INT, clut[11],
"clut12", G_TYPE_INT, clut[12], "clut13", G_TYPE_INT, clut[13],
"clut14", G_TYPE_INT, clut[14], "clut15", G_TYPE_INT, clut[15],
NULL);
/* store event and trigger custom processing */
stream->pending_event =
gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM, s);
stream->need_process = TRUE;
}
break;
}
default:
break;
}
} else {
goto unknown_stream;
}