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ogg: extract width, height and PAR from theora header and add to caps

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This commit is contained in:
Tim-Philipp Müller 2009-12-02 02:08:46 +00:00
parent 295b6c0326
commit 8195c26a08
1 changed files with 25 additions and 4 deletions
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29
ext/ogg/gstoggstream.c
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@ -275,10 +275,19 @@ static gboolean
setup_theora_mapper (GstOggStream * pad, ogg_packet * packet)
{
guint8 *data = packet->packet;
guint w, h, par_d, par_n;
w = GST_READ_UINT24_BE (data + 14) & 0xFFFFF0;
h = GST_READ_UINT24_BE (data + 17) & 0xFFFFF0;
pad->granulerate_n = GST_READ_UINT32_BE (data + 22);
pad->granulerate_d = GST_READ_UINT32_BE (data + 26);
GST_LOG ("fps = %d/%d", pad->granulerate_n, pad->granulerate_d);
par_n = GST_READ_UINT24_BE (data + 30);
par_d = GST_READ_UINT24_BE (data + 33);
GST_LOG ("fps = %d/%d, PAR = %u/%u, width = %u, height = %u",
pad->granulerate_n, pad->granulerate_d, par_n, par_d, w, h);
/* 2 bits + 3 bits = 5 bits KFGSHIFT */
pad->granuleshift = ((GST_READ_UINT8 (data + 40) & 0x03) << 3) +
@ -291,9 +300,21 @@ setup_theora_mapper (GstOggStream * pad, ogg_packet * packet)
|| pad->granulerate_d == 0)
return FALSE;
pad->caps = gst_caps_new_simple ("video/x-theora",
"framerate", GST_TYPE_FRACTION, pad->granulerate_n,
pad->granulerate_d, NULL);
pad->caps = gst_caps_new_simple ("video/x-theora", NULL);
if (w > 0 && h > 0) {
gst_caps_set_simple (pad->caps, "width", G_TYPE_INT, w, "height",
G_TYPE_INT, h, NULL);
}
/* only add framerate now so caps look prettier, with width/height first */
gst_caps_set_simple (pad->caps, "framerate", GST_TYPE_FRACTION,
pad->granulerate_n, pad->granulerate_d, NULL);
if (par_n > 0 && par_d > 0) {
gst_caps_set_simple (pad->caps, "pixel-aspect-ratio", GST_TYPE_FRACTION,
par_n, par_d, NULL);
}
return TRUE;
}