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rtpsv3depay: Fix width/height calculation, bring up to marginal rank.

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Based on documentation found on http://wiki.multimedia.cx/
This commit is contained in:
Edward Hervey 2009-07-29 13:38:03 +02:00
parent 9c341347ba
commit 050e91995e
1 changed files with 26 additions and 8 deletions
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34
gst/rtp/gstrtpsv3vdepay.c
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@ -152,6 +152,19 @@ gst_rtp_sv3v_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
rtpsv3vdepay->nextseq = seq + 1;
{
static struct
{
guint width, height;
} resolutions[7] = {
{
160, 128}, {
128, 96}, {
176, 144}, {
352, 288}, {
704, 576}, {
240, 180}, {
320, 240}
};
gint payload_len;
guint8 *payload;
gboolean M;
@ -188,19 +201,24 @@ gst_rtp_sv3v_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
GstCaps *caps;
GstBuffer *codec_data;
GValue value = { 0 };
guint8 res;
/* if we already have caps, we don't need to do anything. FIXME, check if
* something changed. */
if (GST_PAD_CAPS (GST_BASE_RTP_DEPAYLOAD_SRCPAD (depayload)))
return NULL;
/* No idea... These are the two examples I found.. */
if (payload[2] == 0x1d) {
rtpsv3vdepay->width = 160;
rtpsv3vdepay->height = 128;
} else if (payload[2] == 0xdd) {
rtpsv3vdepay->width = 320;
rtpsv3vdepay->height = 240;
res = payload[2] >> 5;
/* width and height, according to http://wiki.multimedia.cx/index.php?title=Sorenson_Video_1#Stream_Format_And_Header */
if (res < 7) {
rtpsv3vdepay->width = resolutions[res].width;
rtpsv3vdepay->height = resolutions[res].height;
} else {
/* extended width/height, they're contained in the following 24bit */
rtpsv3vdepay->width = ((payload[2] & 0x1f) << 7) | (payload[3] >> 1);
rtpsv3vdepay->height =
(payload[3] & 0x1) << 11 | payload[4] << 3 | (payload[5] >> 5);
}
/* we need a dummy empty codec data */
@ -279,5 +297,5 @@ gboolean
gst_rtp_sv3v_depay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtpsv3vdepay",
GST_RANK_NONE, GST_TYPE_RTP_SV3V_DEPAY);
GST_RANK_MARGINAL, GST_TYPE_RTP_SV3V_DEPAY);
}