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theoradec: use cropping metadata

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This commit is contained in:
Wim Taymans 2011-06-23 18:02:40 +02:00
parent dd7e605fec
commit 558cb821e4
2 changed files with 44 additions and 10 deletions
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53
ext/theora/gsttheoradec.c
View file

@ -829,13 +829,17 @@ theora_negotiate_pool (GstTheoraDec * dec, GstCaps * caps, GstVideoInfo * info)
* it through the video info API. We could also see if the pool support this
* metadata and only activate it then. */
gst_buffer_pool_config_add_meta (config, GST_META_API_VIDEO);
/* FIXME, we can check if downstream supports clipping metadata */
/* check if downstream supports cropping */
dec->use_cropping =
gst_query_has_allocation_meta (query, GST_META_API_VIDEO_CROP);
gst_buffer_pool_set_config (pool, config);
/* and activate */
gst_buffer_pool_set_active (pool, TRUE);
gst_query_unref (query);
return GST_FLOW_OK;
}
@ -909,11 +913,9 @@ theora_handle_type_packet (GstTheoraDec * dec, ogg_packet * packet)
* so no need to handle them ourselves. */
if (dec->offset_x & 1 && dec->info.pixel_fmt != TH_PF_444) {
dec->offset_x--;
width++;
}
if (dec->offset_y & 1 && dec->info.pixel_fmt == TH_PF_420) {
dec->offset_y--;
height++;
}
} else {
/* no cropping, use the encoded dimensions */
@ -1107,10 +1109,13 @@ static GstFlowReturn
theora_handle_image (GstTheoraDec * dec, th_ycbcr_buffer buf, GstBuffer ** out)
{
gint width, height, stride;
gint pic_width, pic_height;
GstFlowReturn result;
int i, plane;
guint8 *dest, *src;
GstVideoFrame frame;
GstMetaVideoCrop *crop;
gint offset_x, offset_y;
if (gst_pad_check_reconfigure (dec->srcpad)) {
GstCaps *caps;
@ -1127,24 +1132,52 @@ theora_handle_image (GstTheoraDec * dec, th_ycbcr_buffer buf, GstBuffer ** out)
if (!gst_video_frame_map (&frame, &dec->vinfo, *out, GST_MAP_WRITE))
goto invalid_frame;
/* FIXME, we can do things slightly more efficient when we know that
* downstream understands clipping and video metadata */
if (dec->crop && !dec->use_cropping) {
/* we need to crop the hard way */
offset_x = dec->info.pic_x;
offset_y = dec->info.pic_y;
pic_width = dec->info.pic_width;
pic_height = dec->info.pic_height;
/* Ensure correct offsets in chroma for formats that need it
* by rounding the offset. libtheora will add proper pixels,
* so no need to handle them ourselves. */
if (offset_x & 1 && dec->info.pixel_fmt != TH_PF_444)
offset_x--;
if (offset_y & 1 && dec->info.pixel_fmt == TH_PF_420)
offset_y--;
} else {
/* copy the whole frame */
offset_x = 0;
offset_y = 0;
pic_width = dec->info.frame_width;
pic_height = dec->info.frame_height;
if (dec->use_cropping) {
crop = gst_buffer_add_meta_video_crop (*out);
/* we can do things slightly more efficient when we know that
* downstream understands clipping */
crop->x = dec->info.pic_x;
crop->y = dec->info.pic_y;
crop->width = dec->info.pic_width;
crop->height = dec->info.pic_height;
}
}
for (plane = 0; plane < 3; plane++) {
width =
gst_video_format_get_component_width (frame.info.format, plane,
dec->vinfo.width);
pic_width);
height =
gst_video_format_get_component_height (frame.info.format, plane,
dec->vinfo.height);
pic_height);
stride = GST_VIDEO_FRAME_STRIDE (&frame, plane);
dest = GST_VIDEO_FRAME_DATA (&frame, plane);
src = buf[plane].data;
src += ((height == dec->vinfo.height) ? dec->offset_y : dec->offset_y / 2)
src += ((height == pic_height) ? offset_y : offset_y / 2)
* buf[plane].stride;
src += (width == dec->vinfo.width) ? dec->offset_x : dec->offset_x / 2;
src += (width == pic_width) ? offset_x : offset_x / 2;
for (i = 0; i < height; i++) {
memcpy (dest, src, width);

1
ext/theora/gsttheoradec.h
View file

@ -74,6 +74,7 @@ struct _GstTheoraDec
gint offset_x, offset_y;
gint output_bpp;
GstBufferPool *pool;
gboolean use_cropping;
/* telemetry debuging options */
gint telemetry_mv;