mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2025-03-30 12:49:40 +00:00
Code Issues 1 Projects Releases Wiki Activity

theoradec: handle 422 images (as YUY2).

Browse source
This commit is contained in:
Michael Smith 2009-04-27 21:30:04 -07:00
parent a91b7f0857
commit 62b571b93b
1 changed files with 83 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

84
ext/theora/theoradec.c
View file

@ -1115,6 +1115,88 @@ theora_dec_push_reverse (GstTheoraDec * dec, GstBuffer * buf)
return result;
}
/* Allocate buffer and copy image data into YUY2 format */
static GstFlowReturn
theora_handle_422_image (GstTheoraDec * dec, yuv_buffer * yuv, GstBuffer ** out)
{
gint width = dec->width;
gint height = dec->height;
gint out_size;
gint stride;
GstFlowReturn result;
int i, j;
stride = GST_ROUND_UP_2 (width) * 2;
out_size = stride * height;
/* now copy over the area contained in offset_x,offset_y,
* frame_width, frame_height */
result =
gst_pad_alloc_buffer_and_set_caps (dec->srcpad, GST_BUFFER_OFFSET_NONE,
out_size, GST_PAD_CAPS (dec->srcpad), out);
if (G_UNLIKELY (result != GST_FLOW_OK))
goto no_buffer;
/* The output pixels look like:
* YUYVYUYV....
*
* Do the interleaving... Note that this is kinda messed up if our width is
* odd. In that case, we can't represent it properly in YUY2, so we just
* pad out to even in that case (this is why we have GST_ROUND_UP_2() above).
*/
{
guchar *src_y;
guchar *src_cb;
guchar *src_cr;
guchar *dest;
guchar *curdest;
guchar *src;
dest = GST_BUFFER_DATA (*out);
src_y = yuv->y + dec->offset_x + dec->offset_y * yuv->y_stride;
src_cb = yuv->u + dec->offset_x / 2 + dec->offset_y * yuv->uv_stride;
src_cr = yuv->v + dec->offset_x / 2 + dec->offset_y * yuv->uv_stride;
for (i = 0; i < height; i++) {
/* Y first */
curdest = dest;
src = src_y;
for (j = 0; j < width; j++) {
*curdest = *src++;
curdest += 2;
}
src_y += yuv->y_stride;
curdest = dest + 1;
src = src_cb;
for (j = 0; j < width; j++) {
*curdest = *src++;
curdest += 4;
}
src_cb += yuv->uv_stride;
curdest = dest + 3;
src = src_cr;
for (j = 0; j < width; j++) {
*curdest = *src++;
curdest += 4;
}
src_cr += yuv->uv_stride;
dest += stride;
}
}
no_buffer:
{
GST_DEBUG_OBJECT (dec, "could not get buffer, reason: %s",
gst_flow_get_name (result));
return result;
}
}
/* Allocate buffer and copy image data into I420 format */
static GstFlowReturn
theora_handle_420_image (GstTheoraDec * dec, yuv_buffer * yuv, GstBuffer ** out)
{
@ -1257,9 +1339,9 @@ theora_handle_data_packet (GstTheoraDec * dec, ogg_packet * packet,
if (dec->info.pixelformat == OC_PF_420) {
result = theora_handle_420_image (dec, &yuv, &out);
#if 0
} else if (dec->info.pixelformat == OC_PF_422) {
result = theora_handle_422_image (dec, &yuv, &out);
#if 0
} else if (dec->info.pixelformat == OC_PF_444) {
result = theora_handle_444_image (dec, &yuv, &out);
} else {