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glvideomixer: don't upload if alpha <= 0

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Implemented using a upload_buffer vfunc within GstGLMixer allowing
NULL uploaded buffers.
This commit is contained in:
Matthew Waters 2015-01-15 09:47:45 +11:00
parent 8e2ca1b6a7
commit 95a98d1d05
2 changed files with 108 additions and 75 deletions
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162
ext/gl/gstglmixer.c
View file

@ -54,6 +54,8 @@ static void gst_gl_mixer_pad_get_property (GObject * object, guint prop_id,
static void gst_gl_mixer_pad_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gl_mixer_pad_finalize (GObject * object);
static GstBuffer *_default_pad_upload_buffer (GstGLMixer * mix,
GstGLMixerFrameData * frame, GstBuffer * buffer);
static void gst_gl_mixer_set_context (GstElement * element,
GstContext * context);
@ -98,6 +100,8 @@ gst_gl_mixer_pad_class_init (GstGLMixerPadClass * klass)
vaggpad_class->set_info = NULL;
vaggpad_class->prepare_frame = NULL;
vaggpad_class->clean_frame = NULL;
klass->upload_buffer = _default_pad_upload_buffer;
}
static void
@ -1043,6 +1047,81 @@ no_decide_allocation:
}
}
static GstBuffer *
_default_pad_upload_buffer (GstGLMixer * mix, GstGLMixerFrameData * frame,
GstBuffer * buffer)
{
GstVideoAggregatorPad *vaggpad = GST_VIDEO_AGGREGATOR_PAD (frame->pad);
GstGLMixerPad *pad = frame->pad;
GstBuffer *uploaded_buf, *gl_buffer;
GstCaps *gl_caps;
GstCapsFeatures *gl_features;
GstVideoInfo gl_info;
GstVideoFrame gl_frame;
GstGLSyncMeta *sync_meta;
gst_video_info_set_format (&gl_info,
GST_VIDEO_FORMAT_RGBA,
GST_VIDEO_INFO_WIDTH (&vaggpad->info),
GST_VIDEO_INFO_HEIGHT (&vaggpad->info));
gl_features =
gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
gl_caps = gst_video_info_to_caps (&gl_info);
gst_caps_set_features (gl_caps, 0, gst_caps_features_copy (gl_features));
if (!pad->upload) {
GstCaps *in_caps = gst_pad_get_current_caps (GST_PAD (pad));
GstCaps *upload_caps = gst_caps_copy (in_caps);
pad->upload = gst_gl_upload_new (mix->context);
gst_caps_set_features (upload_caps, 0,
gst_caps_features_copy (gl_features));
gst_gl_upload_set_caps (pad->upload, in_caps, upload_caps);
if (!pad->convert) {
pad->convert = gst_gl_color_convert_new (mix->context);
gst_gl_color_convert_set_caps (pad->convert, upload_caps, gl_caps);
}
gst_caps_unref (upload_caps);
gst_caps_unref (in_caps);
}
gst_caps_features_free (gl_features);
gst_caps_unref (gl_caps);
sync_meta = gst_buffer_get_gl_sync_meta (vaggpad->buffer);
if (sync_meta)
gst_gl_sync_meta_wait (sync_meta);
if (gst_gl_upload_perform_with_buffer (pad->upload,
vaggpad->buffer, &uploaded_buf) != GST_GL_UPLOAD_DONE) {
return NULL;
}
if (!(gl_buffer = gst_gl_color_convert_perform (pad->convert, uploaded_buf))) {
gst_buffer_unref (uploaded_buf);
return NULL;
}
if (!gst_video_frame_map (&gl_frame, &gl_info, gl_buffer,
GST_MAP_READ | GST_MAP_GL)) {
gst_buffer_unref (uploaded_buf);
gst_buffer_unref (gl_buffer);
return NULL;
}
frame->texture = *(guint *) gl_frame.data[0];
gst_buffer_unref (uploaded_buf);
gst_video_frame_unmap (&gl_frame);
return gl_buffer;
}
gboolean
gst_gl_mixer_process_textures (GstGLMixer * mix, GstBuffer * outbuf)
{
@ -1094,6 +1173,7 @@ gst_gl_mixer_process_textures (GstGLMixer * mix, GstBuffer * outbuf)
mix->frames->pdata[i] = g_slice_new0 (GstGLMixerFrameData);
while (walk) {
GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data);
GstGLMixerPadClass *pad_class = GST_GL_MIXER_PAD_GET_CLASS (pad);
GstVideoAggregatorPad *vaggpad = walk->data;
GstGLMixerFrameData *frame;
@ -1104,84 +1184,17 @@ gst_gl_mixer_process_textures (GstGLMixer * mix, GstBuffer * outbuf)
walk = g_list_next (walk);
if (vaggpad->buffer != NULL) {
GstBuffer *uploaded_buf;
GstCaps *gl_caps;
GstCapsFeatures *gl_features;
GstVideoInfo gl_info;
GstVideoFrame gl_frame;
GstGLSyncMeta *sync_meta;
gst_video_info_set_format (&gl_info,
GST_VIDEO_FORMAT_RGBA,
GST_VIDEO_INFO_WIDTH (&vaggpad->info),
GST_VIDEO_INFO_HEIGHT (&vaggpad->info));
gl_features =
gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
gl_caps = gst_video_info_to_caps (&gl_info);
gst_caps_set_features (gl_caps, 0, gst_caps_features_copy (gl_features));
if (!pad->upload) {
GstCaps *in_caps = gst_pad_get_current_caps (GST_PAD (pad));
GstCaps *upload_caps = gst_caps_copy (in_caps);
pad->upload = gst_gl_upload_new (mix->context);
gst_caps_set_features (upload_caps, 0,
gst_caps_features_copy (gl_features));
gst_gl_upload_set_caps (pad->upload, in_caps, upload_caps);
if (!pad->convert) {
pad->convert = gst_gl_color_convert_new (mix->context);
gst_gl_color_convert_set_caps (pad->convert, upload_caps, gl_caps);
}
gst_caps_unref (upload_caps);
gst_caps_unref (in_caps);
}
gst_caps_features_free (gl_features);
gst_caps_unref (gl_caps);
sync_meta = gst_buffer_get_gl_sync_meta (vaggpad->buffer);
if (sync_meta)
gst_gl_sync_meta_wait (sync_meta);
if (gst_gl_upload_perform_with_buffer (pad->upload,
vaggpad->buffer, &uploaded_buf) != GST_GL_UPLOAD_DONE) {
++array_index;
pad->mapped = FALSE;
continue;
}
g_assert (pad_class->upload_buffer);
if (pad->gl_buffer)
gst_buffer_unref (pad->gl_buffer);
pad->gl_buffer = pad_class->upload_buffer (mix, frame, vaggpad->buffer);
if (!(pad->gl_buffer =
gst_gl_color_convert_perform (pad->convert, uploaded_buf))) {
++array_index;
pad->mapped = FALSE;
gst_buffer_unref (uploaded_buf);
continue;
}
if (!gst_video_frame_map (&gl_frame, &gl_info, pad->gl_buffer,
GST_MAP_READ | GST_MAP_GL)) {
++array_index;
pad->mapped = FALSE;
gst_buffer_unref (uploaded_buf);
gst_buffer_unref (pad->gl_buffer);
pad->gl_buffer = NULL;
continue;
}
pad->mapped = TRUE;
frame->texture = *(guint *) gl_frame.data[0];
gst_buffer_unref (uploaded_buf);
gst_video_frame_unmap (&gl_frame);
GST_DEBUG_OBJECT (pad,
"uploaded buffer %" GST_PTR_FORMAT " from buffer %" GST_PTR_FORMAT,
pad->gl_buffer, vaggpad->buffer);
}
++array_index;
}
@ -1217,10 +1230,9 @@ out:
while (walk) {
GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data);
if (pad->mapped)
if (pad->upload)
gst_gl_upload_release_buffer (pad->upload);
pad->mapped = FALSE;
walk = g_list_next (walk);
i++;
}

21
ext/gl/gstglvideomixer.c
View file

@ -178,6 +178,8 @@ static void gst_gl_video_mixer_pad_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_gl_video_mixer_pad_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstBuffer *gst_gl_video_mixer_pad_upload_buffer (GstGLMixer * mix,
GstGLMixerFrameData * frame, GstBuffer * buffer);
#define DEFAULT_PAD_XPOS 0
#define DEFAULT_PAD_YPOS 0
@ -204,6 +206,7 @@ static void
gst_gl_video_mixer_pad_class_init (GstGLVideoMixerPadClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstGLMixerPadClass *mix_pad_class = (GstGLMixerPadClass *) klass;
gobject_class->set_property = gst_gl_video_mixer_pad_set_property;
gobject_class->get_property = gst_gl_video_mixer_pad_get_property;
@ -228,6 +231,8 @@ gst_gl_video_mixer_pad_class_init (GstGLVideoMixerPadClass * klass)
g_param_spec_double ("alpha", "Alpha", "Alpha of the picture", 0.0, 1.0,
DEFAULT_PAD_ALPHA,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
mix_pad_class->upload_buffer = gst_gl_video_mixer_pad_upload_buffer;
}
static void
@ -293,6 +298,22 @@ gst_gl_video_mixer_pad_set_property (GObject * object, guint prop_id,
gst_object_unref (mix);
}
static GstBuffer *
gst_gl_video_mixer_pad_upload_buffer (GstGLMixer * mix,
GstGLMixerFrameData * frame, GstBuffer * buffer)
{
GstGLVideoMixerPad *pad = GST_GL_VIDEO_MIXER_PAD (frame->pad);
if (pad->alpha > 0.0) {
return
GST_GL_MIXER_PAD_CLASS
(gst_gl_video_mixer_pad_parent_class)->upload_buffer (mix, frame,
buffer);
}
return NULL;
}
#define GST_GL_TYPE_VIDEO_MIXER_BACKGROUND (gst_gl_video_mixer_background_get_type())
static GType
gst_gl_video_mixer_background_get_type (void)