gstreamer/ext/gl/gstglmixer.c
2015-03-13 12:30:20 +00:00

797 lines
21 KiB
C

/* Generic video mixer plugin
*
* GStreamer
* Copyright (C) 2009 Julien Isorce <julien.isorce@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include "gstglmixer.h"
#if GST_GL_HAVE_PLATFORM_EGL
#include <gst/gl/egl/gsteglimagememory.h>
#endif
#define gst_gl_mixer_parent_class parent_class
G_DEFINE_ABSTRACT_TYPE (GstGLMixer, gst_gl_mixer, GST_TYPE_GL_BASE_MIXER);
#define GST_CAT_DEFAULT gst_gl_mixer_debug
GST_DEBUG_CATEGORY (gst_gl_mixer_debug);
static void gst_gl_mixer_pad_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
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);
enum
{
PROP_PAD_0
};
#define GST_GL_MIXER_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_GL_MIXER, GstGLMixerPrivate))
struct _GstGLMixerPrivate
{
gboolean negotiated;
gboolean gl_resource_ready;
GMutex gl_resource_lock;
GCond gl_resource_cond;
};
G_DEFINE_TYPE (GstGLMixerPad, gst_gl_mixer_pad, GST_TYPE_GL_BASE_MIXER_PAD);
static void
gst_gl_mixer_pad_class_init (GstGLMixerPadClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstVideoAggregatorPadClass *vaggpad_class =
(GstVideoAggregatorPadClass *) klass;
gobject_class->set_property = gst_gl_mixer_pad_set_property;
gobject_class->get_property = gst_gl_mixer_pad_get_property;
gobject_class->finalize = gst_gl_mixer_pad_finalize;
vaggpad_class->set_info = NULL;
vaggpad_class->prepare_frame = NULL;
vaggpad_class->clean_frame = NULL;
}
static void
gst_gl_mixer_pad_finalize (GObject * object)
{
G_OBJECT_CLASS (gst_gl_mixer_pad_parent_class)->finalize (object);
}
static void
gst_gl_mixer_pad_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gl_mixer_pad_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
_negotiated_caps (GstVideoAggregator * vagg, GstCaps * caps)
{
GstGLMixer *mix = GST_GL_MIXER (vagg);
gboolean ret;
mix->priv->negotiated = TRUE;
gst_caps_replace (&mix->out_caps, caps);
ret = GST_VIDEO_AGGREGATOR_CLASS (parent_class)->negotiated_caps (vagg, caps);
return ret;
}
static gboolean
gst_gl_mixer_propose_allocation (GstGLBaseMixer * base_mix,
GstGLBaseMixerPad * base_pad, GstQuery * decide_query, GstQuery * query)
{
GstGLMixer *mix = GST_GL_MIXER (base_mix);
GstGLContext *context = base_mix->context;
GstBufferPool *pool = NULL;
GstStructure *config;
GstCaps *caps;
guint size = 0;
gboolean need_pool;
gst_query_parse_allocation (query, &caps, &need_pool);
if (caps == NULL)
goto no_caps;
if (need_pool) {
GstVideoInfo info;
if (!gst_video_info_from_caps (&info, caps))
goto invalid_caps;
GST_DEBUG_OBJECT (mix, "create new pool");
pool = gst_gl_buffer_pool_new (context);
/* the normal size of a frame */
size = info.size;
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
if (!gst_buffer_pool_set_config (pool, config))
goto config_failed;
}
if (pool) {
gst_query_add_allocation_pool (query, pool, size, 1, 0);
gst_object_unref (pool);
}
/* we also support various metadata */
if (context->gl_vtable->FenceSync)
gst_query_add_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, 0);
return TRUE;
/* ERRORS */
no_caps:
{
GST_DEBUG_OBJECT (mix, "no caps specified");
return FALSE;
}
invalid_caps:
{
GST_DEBUG_OBJECT (mix, "invalid caps specified");
return FALSE;
}
config_failed:
{
GST_DEBUG_OBJECT (mix, "failed setting config");
return FALSE;
}
}
static gboolean
gst_gl_mixer_pad_sink_acceptcaps (GstPad * pad, GstGLMixer * mix,
GstCaps * caps)
{
gboolean ret;
GstCaps *template_caps;
GST_DEBUG_OBJECT (pad, "try accept caps of %" GST_PTR_FORMAT, caps);
template_caps = gst_pad_get_pad_template_caps (pad);
template_caps = gst_caps_make_writable (template_caps);
ret = gst_caps_can_intersect (caps, template_caps);
GST_DEBUG_OBJECT (pad, "%saccepted caps %" GST_PTR_FORMAT,
(ret ? "" : "not "), caps);
gst_caps_unref (template_caps);
return ret;
}
/* copies the given caps */
static GstCaps *
_update_caps (GstVideoAggregator * vagg, GstCaps * caps)
{
return gst_gl_caps_replace_all_caps_features (caps,
GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
}
static GstCaps *
gst_gl_mixer_pad_sink_getcaps (GstPad * pad, GstGLMixer * mix, GstCaps * filter)
{
GstCaps *sinkcaps;
GstCaps *template_caps;
GstCaps *filtered_caps;
GstCaps *returned_caps;
gboolean had_current_caps = TRUE;
template_caps = gst_pad_get_pad_template_caps (pad);
sinkcaps = gst_pad_get_current_caps (pad);
if (sinkcaps == NULL) {
had_current_caps = FALSE;
sinkcaps = template_caps;
} else {
sinkcaps = gst_caps_merge (sinkcaps, template_caps);
}
filtered_caps = sinkcaps;
if (filter)
filtered_caps = gst_caps_intersect (sinkcaps, filter);
returned_caps = gst_caps_intersect (filtered_caps, template_caps);
if (filter)
gst_caps_unref (filtered_caps);
if (had_current_caps)
gst_caps_unref (template_caps);
GST_DEBUG_OBJECT (pad, "returning %" GST_PTR_FORMAT, returned_caps);
return returned_caps;
}
static gboolean
gst_gl_mixer_sink_query (GstAggregator * agg, GstAggregatorPad * bpad,
GstQuery * query)
{
gboolean ret = FALSE;
GstGLMixer *mix = GST_GL_MIXER (agg);
GST_TRACE ("QUERY %" GST_PTR_FORMAT, query);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:
{
GstCaps *filter, *caps;
gst_query_parse_caps (query, &filter);
caps = gst_gl_mixer_pad_sink_getcaps (GST_PAD (bpad), mix, filter);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
ret = TRUE;
break;
}
case GST_QUERY_ACCEPT_CAPS:
{
GstCaps *caps;
gst_query_parse_accept_caps (query, &caps);
ret = gst_gl_mixer_pad_sink_acceptcaps (GST_PAD (bpad), mix, caps);
gst_query_set_accept_caps_result (query, ret);
ret = TRUE;
break;
}
default:
ret = GST_AGGREGATOR_CLASS (parent_class)->sink_query (agg, bpad, query);
break;
}
return ret;
}
static void
gst_gl_mixer_pad_init (GstGLMixerPad * mixerpad)
{
}
/* GLMixer signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
PROP_0,
};
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
"RGBA"))
);
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
"RGBA"))
);
static gboolean gst_gl_mixer_src_query (GstAggregator * agg, GstQuery * query);
static GstFlowReturn gst_gl_mixer_get_output_buffer (GstVideoAggregator *
videoaggregator, GstBuffer ** outbuf);
static gboolean gst_gl_mixer_stop (GstAggregator * agg);
static gboolean gst_gl_mixer_start (GstAggregator * agg);
static GstFlowReturn
gst_gl_mixer_aggregate_frames (GstVideoAggregator * vagg,
GstBuffer * outbuffer);
static void gst_gl_mixer_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gl_mixer_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_gl_mixer_decide_allocation (GstGLBaseMixer * mix,
GstQuery * query);
static void gst_gl_mixer_finalize (GObject * object);
static void
gst_gl_mixer_class_init (GstGLMixerClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstVideoAggregatorClass *videoaggregator_class =
(GstVideoAggregatorClass *) klass;
GstAggregatorClass *agg_class = (GstAggregatorClass *) klass;
GstGLBaseMixerClass *mix_class = GST_GL_BASE_MIXER_CLASS (klass);;
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "glmixer", 0, "OpenGL mixer");
g_type_class_add_private (klass, sizeof (GstGLMixerPrivate));
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_gl_mixer_finalize);
gobject_class->get_property = gst_gl_mixer_get_property;
gobject_class->set_property = gst_gl_mixer_set_property;
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_factory));
agg_class->sinkpads_type = GST_TYPE_GL_MIXER_PAD;
agg_class->sink_query = gst_gl_mixer_sink_query;
agg_class->src_query = gst_gl_mixer_src_query;
agg_class->stop = gst_gl_mixer_stop;
agg_class->start = gst_gl_mixer_start;
videoaggregator_class->aggregate_frames = gst_gl_mixer_aggregate_frames;
videoaggregator_class->get_output_buffer = gst_gl_mixer_get_output_buffer;
videoaggregator_class->negotiated_caps = _negotiated_caps;
videoaggregator_class->update_caps = _update_caps;
videoaggregator_class->find_best_format = NULL;
mix_class->propose_allocation = gst_gl_mixer_propose_allocation;
mix_class->decide_allocation = gst_gl_mixer_decide_allocation;
/* Register the pad class */
g_type_class_ref (GST_TYPE_GL_MIXER_PAD);
klass->set_caps = NULL;
}
static void
gst_gl_mixer_reset (GstGLMixer * mix)
{
mix->priv->negotiated = FALSE;
}
static void
gst_gl_mixer_init (GstGLMixer * mix)
{
mix->priv = GST_GL_MIXER_GET_PRIVATE (mix);
mix->array_buffers = 0;
mix->fbo = 0;
mix->depthbuffer = 0;
mix->priv->gl_resource_ready = FALSE;
g_mutex_init (&mix->priv->gl_resource_lock);
g_cond_init (&mix->priv->gl_resource_cond);
/* initialize variables */
gst_gl_mixer_reset (mix);
}
static void
gst_gl_mixer_finalize (GObject * object)
{
GstGLMixer *mix = GST_GL_MIXER (object);
GstGLMixerPrivate *priv = mix->priv;
g_mutex_clear (&priv->gl_resource_lock);
g_cond_clear (&priv->gl_resource_cond);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_gl_mixer_query_caps (GstPad * pad, GstAggregator * agg, GstQuery * query)
{
GstCaps *filter, *current_caps, *retcaps, *template_caps;
gst_query_parse_caps (query, &filter);
template_caps = gst_pad_get_pad_template_caps (agg->srcpad);
current_caps = gst_pad_get_current_caps (pad);
if (current_caps == NULL)
retcaps = gst_caps_ref (template_caps);
else {
retcaps = gst_caps_merge (current_caps, template_caps);
template_caps = NULL;
}
if (filter) {
current_caps =
gst_caps_intersect_full (filter, retcaps, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (retcaps);
retcaps = current_caps;
}
gst_query_set_caps_result (query, retcaps);
gst_caps_unref (retcaps);
if (template_caps)
gst_caps_unref (template_caps);
return TRUE;
}
static gboolean
gst_gl_mixer_src_query (GstAggregator * agg, GstQuery * query)
{
gboolean res = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:
res = gst_gl_mixer_query_caps (agg->srcpad, agg, query);
break;
default:
res = GST_AGGREGATOR_CLASS (parent_class)->src_query (agg, query);
break;
}
return res;
}
static GstFlowReturn
gst_gl_mixer_get_output_buffer (GstVideoAggregator * videoaggregator,
GstBuffer ** outbuf)
{
GstGLMixer *mix = GST_GL_MIXER (videoaggregator);
GstBufferPool *pool;
GstFlowReturn ret;
pool =
gst_gl_base_mixer_get_buffer_pool (GST_GL_BASE_MIXER (videoaggregator));
if (!pool)
return GST_FLOW_NOT_NEGOTIATED;
if (!gst_buffer_pool_is_active (pool)) {
if (!gst_buffer_pool_set_active (pool, TRUE)) {
GST_ELEMENT_ERROR (mix, RESOURCE, SETTINGS,
("failed to activate bufferpool"), ("failed to activate bufferpool"));
return GST_FLOW_ERROR;
}
}
ret = gst_buffer_pool_acquire_buffer (pool, outbuf, NULL);
gst_object_unref (pool);
return ret;
}
static gboolean
gst_gl_mixer_decide_allocation (GstGLBaseMixer * base_mix, GstQuery * query)
{
GstGLMixer *mix = GST_GL_MIXER (base_mix);
GstGLMixerClass *mixer_class = GST_GL_MIXER_GET_CLASS (mix);
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (mix);
GstGLContext *context = base_mix->context;
GstBufferPool *pool = NULL;
GstStructure *config;
GstCaps *caps;
guint min, max, size;
gboolean update_pool;
GError *error = NULL;
guint out_width, out_height;
out_width = GST_VIDEO_INFO_WIDTH (&vagg->info);
out_height = GST_VIDEO_INFO_HEIGHT (&vagg->info);
g_mutex_lock (&mix->priv->gl_resource_lock);
mix->priv->gl_resource_ready = FALSE;
if (mix->fbo) {
gst_gl_context_del_fbo (context, mix->fbo, mix->depthbuffer);
mix->fbo = 0;
mix->depthbuffer = 0;
}
if (!gst_gl_context_gen_fbo (context, out_width, out_height,
&mix->fbo, &mix->depthbuffer)) {
g_cond_signal (&mix->priv->gl_resource_cond);
g_mutex_unlock (&mix->priv->gl_resource_lock);
goto context_error;
}
gst_query_parse_allocation (query, &caps, NULL);
if (mixer_class->set_caps)
mixer_class->set_caps (mix, caps);
mix->priv->gl_resource_ready = TRUE;
g_cond_signal (&mix->priv->gl_resource_cond);
g_mutex_unlock (&mix->priv->gl_resource_lock);
if (gst_query_get_n_allocation_pools (query) > 0) {
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
update_pool = TRUE;
} else {
GstVideoInfo vinfo;
gst_video_info_init (&vinfo);
gst_video_info_from_caps (&vinfo, caps);
size = vinfo.size;
min = max = 0;
update_pool = FALSE;
}
if (!pool)
pool = gst_gl_buffer_pool_new (context);
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, min, max);
gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
gst_buffer_pool_set_config (pool, config);
if (update_pool)
gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
else
gst_query_add_allocation_pool (query, pool, size, min, max);
gst_object_unref (pool);
return TRUE;
context_error:
{
GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND, ("%s", error->message),
(NULL));
return FALSE;
}
}
gboolean
gst_gl_mixer_process_textures (GstGLMixer * mix, GstBuffer * outbuf)
{
guint i;
GList *walk;
guint out_tex;
gboolean res = TRUE;
guint array_index = 0;
GstVideoFrame out_frame;
GstElement *element = GST_ELEMENT (mix);
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (mix);
GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
GstGLMixerPrivate *priv = mix->priv;
GST_TRACE ("Processing buffers");
if (!gst_video_frame_map (&out_frame, &vagg->info, outbuf,
GST_MAP_WRITE | GST_MAP_GL)) {
return FALSE;
}
out_tex = *(guint *) out_frame.data[0];
GST_OBJECT_LOCK (mix);
walk = element->sinkpads;
i = mix->frames->len;
g_ptr_array_set_size (mix->frames, element->numsinkpads);
for (; i < element->numsinkpads; i++)
mix->frames->pdata[i] = g_slice_new0 (GstGLMixerFrameData);
while (walk) {
GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data);
GstVideoAggregatorPad *vaggpad = walk->data;
GstGLMixerFrameData *frame;
frame = g_ptr_array_index (mix->frames, array_index);
frame->pad = pad;
frame->texture = 0;
walk = g_list_next (walk);
if (vaggpad->buffer != NULL) {
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));
sync_meta = gst_buffer_get_gl_sync_meta (vaggpad->buffer);
if (sync_meta)
gst_gl_sync_meta_wait (sync_meta);
if (gst_video_frame_map (&gl_frame, &gl_info, vaggpad->buffer,
GST_MAP_READ | GST_MAP_GL)) {
frame->texture = *(guint *) gl_frame.data[0];
gst_video_frame_unmap (&gl_frame);
}
}
++array_index;
}
g_mutex_lock (&priv->gl_resource_lock);
if (!priv->gl_resource_ready)
g_cond_wait (&priv->gl_resource_cond, &priv->gl_resource_lock);
if (!priv->gl_resource_ready) {
g_mutex_unlock (&priv->gl_resource_lock);
GST_ERROR_OBJECT (mix,
"fbo used to render can't be created, do not run process_textures");
res = FALSE;
goto out;
}
mix_class->process_textures (mix, mix->frames, out_tex);
g_mutex_unlock (&priv->gl_resource_lock);
out:
GST_OBJECT_UNLOCK (mix);
gst_video_frame_unmap (&out_frame);
return res;
}
static gboolean
gst_gl_mixer_process_buffers (GstGLMixer * mix, GstBuffer * outbuf)
{
GList *walk;
guint i, array_index = 0;
GstElement *element = GST_ELEMENT (mix);
GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
GST_OBJECT_LOCK (mix);
walk = GST_ELEMENT (mix)->sinkpads;
i = mix->frames->len;
g_ptr_array_set_size (mix->frames, element->numsinkpads);
for (; i < element->numsinkpads; i++)
mix->frames->pdata[i] = g_slice_new0 (GstGLMixerFrameData);
while (walk) { /* We walk with this list because it's ordered */
GstVideoAggregatorPad *vaggpad = walk->data;
walk = g_list_next (walk);
if (vaggpad->buffer != NULL) {
/* put buffer into array */
mix->array_buffers->pdata[array_index] = vaggpad->buffer;
}
++array_index;
}
GST_OBJECT_UNLOCK (mix);
return mix_class->process_buffers (mix, mix->array_buffers, outbuf);
}
static GstFlowReturn
gst_gl_mixer_aggregate_frames (GstVideoAggregator * vagg, GstBuffer * outbuf)
{
gboolean res = FALSE;
GstGLMixer *mix = GST_GL_MIXER (vagg);
GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (vagg);
GstGLContext *context = GST_GL_BASE_MIXER (mix)->context;
GstGLSyncMeta *sync_meta;
if (mix_class->process_buffers)
res = gst_gl_mixer_process_buffers (mix, outbuf);
else if (mix_class->process_textures)
res = gst_gl_mixer_process_textures (mix, outbuf);
sync_meta = gst_buffer_get_gl_sync_meta (outbuf);
if (sync_meta)
gst_gl_sync_meta_set_sync_point (sync_meta, context);
return res ? GST_FLOW_OK : GST_FLOW_ERROR;
}
static void
gst_gl_mixer_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gl_mixer_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
_free_glmixer_frame_data (GstGLMixerFrameData * frame)
{
g_slice_free1 (sizeof (GstGLMixerFrameData), frame);
}
static gboolean
gst_gl_mixer_start (GstAggregator * agg)
{
guint i;
GstGLMixer *mix = GST_GL_MIXER (agg);
GstElement *element = GST_ELEMENT (agg);
GST_OBJECT_LOCK (mix);
mix->array_buffers = g_ptr_array_new_full (element->numsinkpads,
(GDestroyNotify) _free_glmixer_frame_data);
mix->frames = g_ptr_array_new_full (element->numsinkpads, NULL);
g_ptr_array_set_size (mix->array_buffers, element->numsinkpads);
g_ptr_array_set_size (mix->frames, element->numsinkpads);
for (i = 0; i < element->numsinkpads; i++)
mix->frames->pdata[i] = g_slice_new0 (GstGLMixerFrameData);
GST_OBJECT_UNLOCK (mix);
return GST_AGGREGATOR_CLASS (parent_class)->start (agg);
}
static gboolean
gst_gl_mixer_stop (GstAggregator * agg)
{
GstGLMixer *mix = GST_GL_MIXER (agg);
GstGLMixerClass *mixer_class = GST_GL_MIXER_GET_CLASS (mix);
GstGLContext *context = GST_GL_BASE_MIXER (mix)->context;
GST_OBJECT_LOCK (agg);
g_ptr_array_free (mix->frames, TRUE);
mix->frames = NULL;
g_ptr_array_free (mix->array_buffers, TRUE);
mix->array_buffers = NULL;
GST_OBJECT_UNLOCK (agg);
if (mixer_class->reset)
mixer_class->reset (mix);
if (mix->fbo) {
gst_gl_context_del_fbo (context, mix->fbo, mix->depthbuffer);
mix->fbo = 0;
mix->depthbuffer = 0;
}
gst_gl_mixer_reset (mix);
return GST_AGGREGATOR_CLASS (parent_class)->stop (agg);
}