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gstreamer/ext/gl/gstglmixer.c

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/* 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/base/gstcollectpads.h>
#include <gst/video/video.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#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_VIDEO_AGGREGATOR);
static gboolean gst_gl_mixer_do_bufferpool (GstGLMixer * mix,
GstCaps * outcaps);
#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);
static void gst_gl_mixer_set_context (GstElement * element,
GstContext * context);
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;
GstBufferPool *pool;
gboolean pool_active;
GstAllocator *allocator;
GstAllocationParams params;
GstQuery *query;
gboolean gl_resource_ready;
GMutex gl_resource_lock;
GCond gl_resource_cond;
};
G_DEFINE_TYPE (GstGLMixerPad, gst_gl_mixer_pad, GST_TYPE_VIDEO_AGGREGATOR_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)
{
GstGLMixerPad *pad = GST_GL_MIXER_PAD (object);
if (pad->upload) {
gst_object_unref (pad->upload);
pad->upload = NULL;
}
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 = gst_gl_mixer_do_bufferpool (mix, caps);
mix->priv->negotiated = ret;
gst_caps_replace (&mix->out_caps, caps);
return ret;
}
static gboolean
gst_gl_mixer_propose_allocation (GstGLMixer * mix,
GstQuery * decide_query, GstQuery * query)
{
GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
GstBufferPool *pool;
GstStructure *config;
GstCaps *caps;
guint size = 0;
gboolean need_pool;
GError *error = NULL;
GstStructure *gl_context;
gchar *platform, *gl_apis;
gpointer handle;
GstAllocator *allocator = NULL;
GstAllocationParams params;
gst_query_parse_allocation (query, &caps, &need_pool);
if (caps == NULL)
goto no_caps;
if ((pool = mix->priv->pool))
gst_object_ref (pool);
if (pool != NULL) {
GstCaps *pcaps;
/* we had a pool, check caps */
GST_DEBUG_OBJECT (mix, "check existing pool caps");
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_get_params (config, &pcaps, &size, NULL, NULL);
if (!gst_caps_is_equal (caps, pcaps)) {
GST_DEBUG_OBJECT (mix, "pool has different caps");
/* different caps, we can't use this pool */
gst_object_unref (pool);
pool = NULL;
}
gst_structure_free (config);
}
if (!gst_gl_ensure_element_data (mix, &mix->display, &mix->other_context))
return FALSE;
gst_gl_display_filter_gl_api (mix->display, mix_class->supported_gl_api);
if (!mix->context) {
mix->context = gst_gl_context_new (mix->display);
if (!gst_gl_context_create (mix->context, mix->other_context, &error))
goto context_error;
}
if (pool == NULL && 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 (mix->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 */
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, 0);
if (mix->context->gl_vtable->FenceSync)
gst_query_add_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, 0);
gl_apis = gst_gl_api_to_string (gst_gl_context_get_gl_api (mix->context));
platform =
gst_gl_platform_to_string (gst_gl_context_get_gl_platform (mix->context));
handle = (gpointer) gst_gl_context_get_gl_context (mix->context);
gl_context =
gst_structure_new ("GstVideoGLTextureUploadMeta", "gst.gl.GstGLContext",
GST_GL_TYPE_CONTEXT, mix->context, "gst.gl.context.handle",
G_TYPE_POINTER, handle, "gst.gl.context.type", G_TYPE_STRING, platform,
"gst.gl.context.apis", G_TYPE_STRING, gl_apis, NULL);
gst_query_add_allocation_meta (query,
GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE, gl_context);
g_free (gl_apis);
g_free (platform);
gst_structure_free (gl_context);
gst_allocation_params_init (&params);
allocator = gst_allocator_find (GST_GL_MEMORY_ALLOCATOR);
gst_query_add_allocation_param (query, allocator, &params);
gst_object_unref (allocator);
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;
}
context_error:
{
GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND, ("%s", error->message),
(NULL));
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;
}
static GstCaps *
gst_gl_mixer_set_caps_features (const GstCaps * caps,
const gchar * feature_name)
{
GstCaps *tmp = gst_caps_copy (caps);
guint n = gst_caps_get_size (tmp);
guint i = 0;
for (i = 0; i < n; i++) {
GstCapsFeatures *features = gst_caps_get_features (tmp, i);
if (features) {
guint n_f = gst_caps_features_get_size (features);
guint j = 0;
for (j = 0; j < n_f; j++) {
gst_caps_features_remove_id (features,
gst_caps_features_get_nth_id (features, j));
}
}
gst_caps_features_add (features, feature_name);
gst_caps_set_simple (tmp, "format", G_TYPE_STRING, "RGBA", NULL);
}
return tmp;
}
/* copies the given caps */
static GstCaps *
gst_gl_mixer_caps_remove_format_info (GstCaps * caps)
{
GstStructure *st;
GstCapsFeatures *f;
gint i, n;
GstCaps *res;
res = gst_caps_new_empty ();
n = gst_caps_get_size (caps);
for (i = 0; i < n; i++) {
st = gst_caps_get_structure (caps, i);
f = gst_caps_get_features (caps, i);
/* If this is already expressed by the existing caps
* skip this structure */
if (i > 0 && gst_caps_is_subset_structure_full (res, st, f))
continue;
st = gst_structure_copy (st);
/* Only remove format info for the cases when we can actually convert */
if (!gst_caps_features_is_any (f)
&& gst_caps_features_is_equal (f,
GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY))
gst_structure_remove_fields (st, "format", "colorimetry", "chroma-site",
NULL);
gst_structure_remove_fields (st, "width", "height", NULL);
gst_caps_append_structure_full (res, st, gst_caps_features_copy (f));
}
return res;
}
GstCaps *
gst_gl_mixer_update_caps (GstGLMixer * mix, GstCaps * caps)
{
GstCaps *result = NULL;
GstCaps *glcaps = gst_gl_mixer_set_caps_features (caps,
GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
#if GST_GL_HAVE_PLATFORM_EGL
GstCaps *eglcaps = gst_gl_mixer_set_caps_features (caps,
GST_CAPS_FEATURE_MEMORY_EGL_IMAGE);
#endif
GstCaps *uploadcaps = gst_gl_mixer_set_caps_features (caps,
GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META);
GstCaps *raw_caps =
gst_caps_from_string (GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS));
result = gst_caps_new_empty ();
result = gst_caps_merge (result, glcaps);
#if GST_GL_HAVE_PLATFORM_EGL
result = gst_caps_merge (result, eglcaps);
#endif
result = gst_caps_merge (result, uploadcaps);
result = gst_caps_merge (result, raw_caps);
result = gst_caps_merge (result, gst_gl_mixer_caps_remove_format_info (caps));
GST_DEBUG_OBJECT (mix, "returning %" GST_PTR_FORMAT, result);
return result;
}
static GstCaps *
gst_gl_mixer_pad_sink_getcaps (GstPad * pad, GstGLMixer * mix, GstCaps * filter)
{
GstCaps *srccaps;
GstCaps *template_caps;
GstCaps *filtered_caps;
GstCaps *returned_caps;
gboolean had_current_caps = TRUE;
template_caps = gst_pad_get_pad_template_caps (pad);
srccaps = gst_pad_get_current_caps (pad);
if (srccaps == NULL) {
had_current_caps = FALSE;
srccaps = template_caps;
} else {
srccaps = gst_caps_merge (srccaps, gst_gl_mixer_update_caps (mix, srccaps));
}
filtered_caps = srccaps;
if (filter)
filtered_caps = gst_caps_intersect (srccaps, 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);
GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
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;
}
case GST_QUERY_ALLOCATION:
{
GstQuery *decide_query = NULL;
GST_OBJECT_LOCK (mix);
if (G_UNLIKELY (!mix->priv->negotiated)) {
GST_DEBUG_OBJECT (mix,
"not negotiated yet, can't answer ALLOCATION query");
GST_OBJECT_UNLOCK (mix);
return FALSE;
}
if ((decide_query = mix->priv->query))
gst_query_ref (decide_query);
GST_OBJECT_UNLOCK (mix);
GST_DEBUG_OBJECT (mix,
"calling propose allocation with query %" GST_PTR_FORMAT,
decide_query);
/* pass the query to the propose_allocation vmethod if any */
ret = gst_gl_mixer_propose_allocation (mix, decide_query, query);
if (decide_query)
gst_query_unref (decide_query);
GST_DEBUG_OBJECT (mix, "ALLOCATION ret %d, %" GST_PTR_FORMAT, ret, query);
break;
}
case GST_QUERY_CONTEXT:
{
ret = gst_gl_handle_context_query ((GstElement *) mix, query,
&mix->display, &mix->other_context);
if (mix->display)
gst_gl_display_filter_gl_api (mix->display,
mix_class->supported_gl_api);
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,
PROP_CONTEXT
};
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") "; "
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
"RGBA")
"; " GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS))
);
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") "; "
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
"RGBA")
"; " GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS))
);
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_src_activate_mode (GstAggregator * aggregator, GstPadMode mode,
gboolean active);
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 (GstGLMixer * mix,
GstQuery * query);
static gboolean gst_gl_mixer_set_allocation (GstGLMixer * mix,
GstBufferPool * pool, GstAllocator * allocator,
GstAllocationParams * params, GstQuery * query);
static void gst_gl_mixer_finalize (GObject * object);
static void
gst_gl_mixer_class_init (GstGLMixerClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
GstVideoAggregatorClass *videoaggregator_class =
(GstVideoAggregatorClass *) klass;
GstAggregatorClass *agg_class = (GstAggregatorClass *) klass;
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "glmixer", 0, "opengl mixer");
gobject_class = (GObjectClass *) klass;
element_class = GST_ELEMENT_CLASS (klass);
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));
element_class->set_context = GST_DEBUG_FUNCPTR (gst_gl_mixer_set_context);
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->src_activate = gst_gl_mixer_src_activate_mode;
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->find_best_format = NULL;
g_object_class_install_property (gobject_class, PROP_CONTEXT,
g_param_spec_object ("context",
"OpenGL context",
"Get OpenGL context",
GST_GL_TYPE_CONTEXT, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/* Register the pad class */
g_type_class_ref (GST_TYPE_GL_MIXER_PAD);
klass->set_caps = NULL;
klass->supported_gl_api = GST_GL_API_ANY;
}
static void
gst_gl_mixer_reset (GstGLMixer * mix)
{
/* clean up collect data */
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->display = NULL;
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;
if (mix->other_context) {
gst_object_unref (mix->other_context);
mix->other_context = NULL;
}
g_mutex_clear (&priv->gl_resource_lock);
g_cond_clear (&priv->gl_resource_cond);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_gl_mixer_set_context (GstElement * element, GstContext * context)
{
GstGLMixer *mix = GST_GL_MIXER (element);
GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
gst_gl_handle_set_context (element, context, &mix->display,
&mix->other_context);
if (mix->display)
gst_gl_display_filter_gl_api (mix->display, mix_class->supported_gl_api);
}
static gboolean
gst_gl_mixer_activate (GstGLMixer * mix, gboolean active)
{
GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
gboolean result = TRUE;
if (active) {
if (!gst_gl_ensure_element_data (mix, &mix->display, &mix->other_context))
return FALSE;
gst_gl_display_filter_gl_api (mix->display, mix_class->supported_gl_api);
}
return result;
}
static gboolean
gst_gl_mixer_src_activate_mode (GstAggregator * aggregator, GstPadMode mode,
gboolean active)
{
GstGLMixer *mix;
gboolean result = FALSE;
mix = GST_GL_MIXER (aggregator);
switch (mode) {
case GST_PAD_MODE_PUSH:
case GST_PAD_MODE_PULL:
result = gst_gl_mixer_activate (mix, active);
break;
default:
result = TRUE;
break;
}
return result;
}
static gboolean
gst_gl_mixer_query_caps (GstPad * pad, GstAggregator * agg, GstQuery * query)
{
GstCaps *filter, *current_caps, *retcaps;
gst_query_parse_caps (query, &filter);
current_caps = gst_pad_get_current_caps (pad);
if (current_caps == NULL)
current_caps = gst_pad_get_pad_template_caps (agg->srcpad);
retcaps = gst_gl_mixer_caps_remove_format_info (current_caps);
gst_caps_unref (current_caps);
if (filter)
retcaps =
gst_caps_intersect_full (filter, retcaps, GST_CAPS_INTERSECT_FIRST);
gst_query_set_caps_result (query, retcaps);
gst_caps_unref (retcaps);
return TRUE;
}
static gboolean
gst_gl_mixer_src_query (GstAggregator * agg, GstQuery * query)
{
gboolean res = FALSE;
GstGLMixer *mix = GST_GL_MIXER (agg);
GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONTEXT:
{
res = gst_gl_handle_context_query ((GstElement *) mix, query,
&mix->display, &mix->other_context);
if (mix->display)
gst_gl_display_filter_gl_api (mix->display,
mix_class->supported_gl_api);
break;
}
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);
if (!mix->priv->pool_active) {
if (!gst_buffer_pool_set_active (mix->priv->pool, TRUE)) {
GST_ELEMENT_ERROR (mix, RESOURCE, SETTINGS,
("failed to activate bufferpool"), ("failed to activate bufferpool"));
return GST_FLOW_ERROR;
}
mix->priv->pool_active = TRUE;
}
return gst_buffer_pool_acquire_buffer (mix->priv->pool, outbuf, NULL);
}
static gboolean
gst_gl_mixer_decide_allocation (GstGLMixer * mix, GstQuery * query)
{
GstGLMixerClass *mixer_class = GST_GL_MIXER_GET_CLASS (mix);
GstBufferPool *pool = NULL;
GstStructure *config;
GstCaps *caps;
guint min, max, size;
gboolean update_pool;
GError *error = NULL;
guint idx;
guint out_width, out_height;
GstGLContext *other_context = NULL;
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (mix);
gboolean same_downstream_gl_context = FALSE;
if (!gst_gl_ensure_element_data (mix, &mix->display, &mix->other_context))
return FALSE;
gst_gl_display_filter_gl_api (mix->display, mixer_class->supported_gl_api);
if (gst_query_find_allocation_meta (query,
GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE, &idx)) {
GstGLContext *context;
const GstStructure *upload_meta_params;
gpointer handle;
gchar *type;
gchar *apis;
gst_query_parse_nth_allocation_meta (query, idx, &upload_meta_params);
if (upload_meta_params) {
if (gst_structure_get (upload_meta_params, "gst.gl.GstGLContext",
GST_GL_TYPE_CONTEXT, &context, NULL) && context) {
GstGLContext *old = mix->context;
mix->context = context;
if (old)
gst_object_unref (old);
same_downstream_gl_context = TRUE;
} else if (gst_structure_get (upload_meta_params, "gst.gl.context.handle",
G_TYPE_POINTER, &handle, "gst.gl.context.type", G_TYPE_STRING,
&type, "gst.gl.context.apis", G_TYPE_STRING, &apis, NULL)
&& handle) {
GstGLPlatform platform;
GstGLAPI gl_apis;
GST_DEBUG ("got GL context handle 0x%p with type %s and apis %s",
handle, type, apis);
platform = gst_gl_platform_from_string (type);
gl_apis = gst_gl_api_from_string (apis);
if (gl_apis && platform)
other_context =
gst_gl_context_new_wrapped (mix->display, (guintptr) handle,
platform, gl_apis);
}
}
}
if (mix->other_context) {
if (!other_context) {
other_context = mix->other_context;
} else {
GST_ELEMENT_WARNING (mix, LIBRARY, SETTINGS,
("%s", "Cannot share with more than one GL context"),
("%s", "Cannot share with more than one GL context"));
}
}
if (!mix->context) {
mix->context = gst_gl_context_new (mix->display);
if (!gst_gl_context_create (mix->context, other_context, &error))
goto context_error;
}
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 (mix->context, mix->fbo, mix->depthbuffer);
mix->fbo = 0;
mix->depthbuffer = 0;
}
if (!gst_gl_context_gen_fbo (mix->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;
}
if (mix->out_tex_id)
gst_gl_context_del_texture (mix->context, &mix->out_tex_id);
gst_gl_context_gen_texture (mix->context, &mix->out_tex_id,
GST_VIDEO_FORMAT_RGBA, out_width, out_height);
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 || (!same_downstream_gl_context
&& gst_query_find_allocation_meta (query, GST_GL_SYNC_META_API_TYPE,
NULL)
&& !gst_buffer_pool_has_option (pool,
GST_BUFFER_POOL_OPTION_GL_SYNC_META))) {
/* can't use this pool */
if (pool)
gst_object_unref (pool);
pool = gst_gl_buffer_pool_new (mix->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);
if (gst_query_find_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, NULL))
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_GL_SYNC_META);
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_GL_TEXTURE_UPLOAD_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;
}
}
/* takes ownership of the pool, allocator and query */
static gboolean
gst_gl_mixer_set_allocation (GstGLMixer * mix,
GstBufferPool * pool, GstAllocator * allocator,
GstAllocationParams * params, GstQuery * query)
{
GstAllocator *oldalloc;
GstBufferPool *oldpool;
GstQuery *oldquery;
GstGLMixerPrivate *priv = mix->priv;
GST_DEBUG ("storing allocation query");
GST_OBJECT_LOCK (mix);
oldpool = priv->pool;
priv->pool = pool;
priv->pool_active = FALSE;
oldalloc = priv->allocator;
priv->allocator = allocator;
oldquery = priv->query;
priv->query = query;
if (params)
priv->params = *params;
else
gst_allocation_params_init (&priv->params);
GST_OBJECT_UNLOCK (mix);
if (oldpool) {
GST_DEBUG_OBJECT (mix, "deactivating old pool %p", oldpool);
gst_buffer_pool_set_active (oldpool, FALSE);
gst_object_unref (oldpool);
}
if (oldalloc) {
gst_object_unref (oldalloc);
}
if (oldquery) {
gst_query_unref (oldquery);
}
return TRUE;
}
static gboolean
gst_gl_mixer_do_bufferpool (GstGLMixer * mix, GstCaps * outcaps)
{
GstQuery *query;
gboolean result = TRUE;
GstBufferPool *pool = NULL;
GstAllocator *allocator;
GstAllocationParams params;
GstAggregator *agg = GST_AGGREGATOR (mix);
/* find a pool for the negotiated caps now */
GST_DEBUG_OBJECT (mix, "doing allocation query");
query = gst_query_new_allocation (outcaps, TRUE);
if (!gst_pad_peer_query (agg->srcpad, query)) {
/* not a problem, just debug a little */
GST_DEBUG_OBJECT (mix, "peer ALLOCATION query failed");
}
GST_DEBUG_OBJECT (mix, "calling decide_allocation");
result = gst_gl_mixer_decide_allocation (mix, query);
GST_DEBUG_OBJECT (mix, "ALLOCATION (%d) params: %" GST_PTR_FORMAT, result,
query);
if (!result)
goto no_decide_allocation;
/* we got configuration from our peer or the decide_allocation method,
* parse them */
if (gst_query_get_n_allocation_params (query) > 0) {
gst_query_parse_nth_allocation_param (query, 0, &allocator, &params);
} else {
allocator = NULL;
gst_allocation_params_init (&params);
}
if (gst_query_get_n_allocation_pools (query) > 0)
gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
/* now store */
result = gst_gl_mixer_set_allocation (mix, pool, allocator, &params, query);
return result;
/* Errors */
no_decide_allocation:
{
GST_WARNING_OBJECT (mix, "Failed to decide allocation");
gst_query_unref (query);
return result;
}
}
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;
gboolean to_download =
gst_caps_features_is_equal (GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY,
gst_caps_get_features (mix->out_caps, 0));
GstMapFlags out_map_flags = GST_MAP_WRITE;
GST_TRACE ("Processing buffers");
to_download |= !gst_is_gl_memory (gst_buffer_peek_memory (outbuf, 0));
if (!to_download)
out_map_flags |= GST_MAP_GL;
if (!gst_video_frame_map (&out_frame, &vagg->info, outbuf, out_map_flags)) {
return FALSE;
}
if (!to_download) {
out_tex = *(guint *) out_frame.data[0];
} else {
GST_INFO ("Output Buffer does not contain correct memory, "
"attempting to wrap for download");
if (!mix->download)
mix->download = gst_gl_download_new (mix->context);
gst_gl_download_set_format (mix->download, &out_frame.info);
out_tex = mix->out_tex_id;
}
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) {
GstBuffer *gl_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, gl_features);
if (!pad->upload) {
GstCaps *in_caps = gst_pad_get_current_caps (GST_PAD (pad));
pad->upload = gst_gl_upload_new (mix->context);
gst_gl_upload_set_caps (pad->upload, in_caps, gl_caps);
gst_caps_unref (in_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, &gl_buf)) {
++array_index;
pad->mapped = FALSE;
gst_caps_unref (gl_caps);
continue;
}
if (!gst_video_frame_map (&gl_frame, &gl_info, gl_buf,
GST_MAP_READ | GST_MAP_GL)) {
++array_index;
pad->mapped = FALSE;
gst_buffer_unref (gl_buf);
gst_caps_unref (gl_caps);
continue;
}
pad->mapped = TRUE;
frame->texture = *(guint *) gl_frame.data[0];
gst_caps_unref (gl_caps);
gst_video_frame_unmap (&gl_frame);
gst_buffer_unref (gl_buf);
}
++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);
if (to_download) {
if (!gst_gl_download_perform_with_data (mix->download, out_tex,
out_frame.data)) {
GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND, ("%s",
"Failed to download video frame"), (NULL));
res = FALSE;
goto out;
}
}
out:
i = 0;
walk = GST_ELEMENT (mix)->sinkpads;
while (walk) {
GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data);
if (pad->mapped)
gst_gl_upload_release_buffer (pad->upload);
pad->mapped = FALSE;
walk = g_list_next (walk);
i++;
}
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);
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, mix->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)
{
GstGLMixer *mixer = GST_GL_MIXER (object);
switch (prop_id) {
case PROP_CONTEXT:
g_value_set_object (value, mixer->context);
break;
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 gboolean
_clean_upload (GstAggregator * agg, GstAggregatorPad * aggpad, gpointer udata)
{
GstGLMixerPad *pad = GST_GL_MIXER_PAD (aggpad);
if (pad->upload) {
gst_object_unref (pad->upload);
pad->upload = NULL;
}
return TRUE;
}
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 TRUE;
}
static gboolean
gst_gl_mixer_stop (GstAggregator * agg)
{
GstGLMixer *mix = GST_GL_MIXER (agg);
GstGLMixerClass *mixer_class = GST_GL_MIXER_GET_CLASS (mix);
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 (mix->context, mix->fbo, mix->depthbuffer);
mix->fbo = 0;
mix->depthbuffer = 0;
}
if (mix->download) {
gst_object_unref (mix->download);
mix->download = NULL;
}
gst_aggregator_iterate_sinkpads (GST_AGGREGATOR (mix), _clean_upload, NULL);
if (mix->priv->query) {
gst_query_unref (mix->priv->query);
mix->priv->query = NULL;
}
if (mix->priv->pool) {
gst_object_unref (mix->priv->pool);
mix->priv->pool = NULL;
}
if (mix->display) {
gst_object_unref (mix->display);
mix->display = NULL;
}
if (mix->context) {
gst_object_unref (mix->context);
mix->context = NULL;
}
gst_gl_mixer_reset (mix);
return TRUE;
}
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