GstBuffer *
gst_core_video_buffer_new (GstCoreMediaCtx * ctx, CVBufferRef cvbuf)
{
GstCVApi *cv = ctx->cv;
void *data;
size_t size;
CVPixelBufferRef pixbuf = NULL;
GstCoreVideoBuffer *buf;
if (CFGetTypeID (cvbuf) == cv->CVPixelBufferGetTypeID ()) {
pixbuf = (CVPixelBufferRef) cvbuf;
if (cv->CVPixelBufferLockBaseAddress (pixbuf,
kCVPixelBufferLock_ReadOnly) != kCVReturnSuccess) {
goto error;
}
data = cv->CVPixelBufferGetBaseAddress (pixbuf);
size = cv->CVPixelBufferGetBytesPerRow (pixbuf) *
cv->CVPixelBufferGetHeight (pixbuf);
} else {
/* TODO: Do we need to handle other buffer types? */
goto error;
}
buf = GST_CORE_VIDEO_BUFFER_CAST (gst_mini_object_new
(GST_TYPE_CORE_VIDEO_BUFFER));
buf->ctx = g_object_ref (ctx);
buf->cvbuf = cv->CVBufferRetain (cvbuf);
buf->pixbuf = pixbuf;
GST_BUFFER_DATA (buf) = data;
GST_BUFFER_SIZE (buf) = size;
return GST_BUFFER_CAST (buf);
error:
return NULL;
}
GstBuffer *
gst_core_video_buffer_new (GstCoreMediaCtx * ctx, CVBufferRef cvbuf,
GstVideoInfo * vinfo)
{
GstCVApi *cv = ctx->cv;
void *data;
size_t size;
CVPixelBufferRef pixbuf = NULL;
GstBuffer *buf;
GstCoreVideoMeta *meta;
guint width, height, n_planes, i;
gsize offset[GST_VIDEO_MAX_PLANES];
gint stride[GST_VIDEO_MAX_PLANES];
if (CFGetTypeID (cvbuf) != cv->CVPixelBufferGetTypeID ())
/* TODO: Do we need to handle other buffer types? */
goto error;
pixbuf = (CVPixelBufferRef) cvbuf;
if (cv->CVPixelBufferLockBaseAddress (pixbuf,
kCVPixelBufferLock_ReadOnly) != kCVReturnSuccess) {
goto error;
}
buf = gst_buffer_new ();
/* add the corevideo meta to free the underlying corevideo buffer */
meta = (GstCoreVideoMeta *) gst_buffer_add_meta (buf,
gst_core_video_meta_get_info (), NULL);
meta->ctx = g_object_ref (ctx);
meta->cvbuf = cv->CVBufferRetain (cvbuf);
meta->pixbuf = pixbuf;
/* set stride, offset and size */
memset (&offset, 0, sizeof (offset));
memset (&stride, 0, sizeof (stride));
data = cv->CVPixelBufferGetBaseAddress (pixbuf);
height = cv->CVPixelBufferGetHeight (pixbuf);
if (cv->CVPixelBufferIsPlanar (pixbuf)) {
GstVideoInfo tmp_vinfo;
n_planes = cv->CVPixelBufferGetPlaneCount (pixbuf);
for (i = 0; i < n_planes; ++i)
stride[i] = cv->CVPixelBufferGetBytesPerRowOfPlane (pixbuf, i);
/* FIXME: don't hardcode NV12 */
gst_video_info_init (&tmp_vinfo);
gst_video_info_set_format (&tmp_vinfo,
GST_VIDEO_FORMAT_NV12, stride[0], height);
offset[1] = tmp_vinfo.offset[1];
size = tmp_vinfo.size;
} else {
n_planes = 1;
size = cv->CVPixelBufferGetBytesPerRow (pixbuf) * height;
}
gst_buffer_append_memory (buf,
gst_memory_new_wrapped (GST_MEMORY_FLAG_NO_SHARE, data,
size, 0, size, NULL, NULL));
if (vinfo) {
GstVideoMeta *video_meta;
width = vinfo->width;
video_meta =
gst_buffer_add_video_meta_full (buf, GST_VIDEO_FRAME_FLAG_NONE,
GST_VIDEO_FORMAT_NV12, width, height, n_planes, offset, stride);
}
return buf;
error:
return NULL;
}