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gstreamer/gst-libs/gst/gl/gstglmixer.c
Matthew Waters 6a7ccd6f3e glmixer: lock the size of mix->frames to the number of pads 
Fixes a segfault with decodebin ! glmixer where the request pads on
both sides were being requested after the state change to PAUSED.

Also fixes dynamically adding and removing pads while glmixer is
in a state >= PAUSED.
2017-12-09 19:31:42 +00:00

2365 lines
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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"
#define GST_CAT_DEFAULT gst_gl_mixer_debug
GST_DEBUG_CATEGORY (gst_gl_mixer_debug);
#define GST_GL_MIXER_GET_LOCK(mix) \
(GST_GL_MIXER(mix)->lock)
#define GST_GL_MIXER_LOCK(mix) \
(g_mutex_lock(&GST_GL_MIXER_GET_LOCK (mix)))
#define GST_GL_MIXER_UNLOCK(mix) \
(g_mutex_unlock(&GST_GL_MIXER_GET_LOCK (mix)))
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 gboolean gst_gl_mixer_src_event (GstPad * pad, GstObject * object,
GstEvent * event);
static gboolean gst_gl_mixer_sink_event (GstCollectPads * pads,
GstCollectData * cdata, GstEvent * event, GstGLMixer * mix);
static gboolean gst_gl_mixer_src_setcaps (GstPad * pad, GstGLMixer * mix,
GstCaps * caps);
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;
};
G_DEFINE_TYPE (GstGLMixerPad, gst_gl_mixer_pad, GST_TYPE_PAD);
static void
gst_gl_mixer_pad_class_init (GstGLMixerPadClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->set_property = gst_gl_mixer_pad_set_property;
gobject_class->get_property = gst_gl_mixer_pad_get_property;
}
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
gst_gl_mixer_update_src_caps (GstGLMixer * mix)
{
GSList *l;
gint best_width = -1, best_height = -1;
gdouble best_fps = -1, cur_fps;
gint best_fps_n = -1, best_fps_d = -1;
gboolean ret = TRUE;
GST_GL_MIXER_LOCK (mix);
for (l = mix->sinkpads; l; l = l->next) {
GstGLMixerPad *mpad = l->data;
gint this_width, this_height;
gint fps_n, fps_d;
gint width, height;
fps_n = GST_VIDEO_INFO_FPS_N (&mpad->in_info);
fps_d = GST_VIDEO_INFO_FPS_D (&mpad->in_info);
width = GST_VIDEO_INFO_WIDTH (&mpad->in_info);
height = GST_VIDEO_INFO_HEIGHT (&mpad->in_info);
if (width == 0 || height == 0)
continue;
this_width = width;
this_height = height;
if (best_width < this_width)
best_width = this_width;
if (best_height < this_height)
best_height = this_height;
if (fps_d == 0)
cur_fps = 0.0;
else
gst_util_fraction_to_double (fps_n, fps_d, &cur_fps);
if (best_fps < cur_fps) {
best_fps = cur_fps;
best_fps_n = fps_n;
best_fps_d = fps_d;
}
}
if (best_fps_n == 0 || (best_fps_n < 0 && best_fps_d <= 0)) {
best_fps_n = 25;
best_fps_d = 1;
best_fps = 25.0;
}
if (best_width > 0 && best_height > 0 && best_fps > 0.0) {
GstCaps *caps, *peercaps;
GstStructure *s;
GstVideoInfo info;
if (GST_VIDEO_INFO_FPS_N (&mix->out_info) != best_fps_n ||
GST_VIDEO_INFO_FPS_D (&mix->out_info) != best_fps_d) {
if (mix->segment.position != -1) {
mix->ts_offset = mix->segment.position - mix->segment.start;
mix->nframes = 0;
}
}
caps = gst_caps_new_empty_simple ("video/x-raw");
peercaps = gst_pad_peer_query_caps (mix->srcpad, NULL);
if (peercaps) {
GstCaps *tmp;
tmp = gst_caps_intersect (caps, peercaps);
gst_caps_unref (caps);
gst_caps_unref (peercaps);
caps = tmp;
}
if (!gst_caps_is_fixed (caps)) {
caps = gst_caps_make_writable (caps);
caps = gst_caps_truncate (caps);
s = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (s, "width", best_width);
gst_structure_fixate_field_nearest_int (s, "height", best_height);
gst_structure_fixate_field_nearest_fraction (s, "framerate", best_fps_n,
best_fps_d);
gst_structure_fixate_field_string (s, "format", "RGBA");
gst_structure_get_int (s, "width", &info.width);
gst_structure_get_int (s, "height", &info.height);
gst_structure_get_fraction (s, "fraction", &info.fps_n, &info.fps_d);
GST_DEBUG_OBJECT (mix, "fixated caps to %" GST_PTR_FORMAT, caps);
}
GST_GL_MIXER_UNLOCK (mix);
ret = gst_gl_mixer_src_setcaps (mix->srcpad, mix, caps);
} else {
GST_ERROR_OBJECT (mix, "Invalid caps");
GST_GL_MIXER_UNLOCK (mix);
}
return ret;
}
static gboolean
gst_gl_mixer_pad_sink_setcaps (GstPad * pad, GstObject * parent, GstCaps * caps)
{
GstGLMixer *mix;
GstGLMixerPad *mixpad;
GstVideoInfo info;
gboolean ret = TRUE;
GST_INFO_OBJECT (pad, "Setting caps %" GST_PTR_FORMAT, caps);
mix = GST_GL_MIXER (parent);
mixpad = GST_GL_MIXER_PAD (pad);
if (!gst_video_info_from_caps (&info, caps)) {
GST_ERROR_OBJECT (pad, "Failed to parse caps");
goto beach;
}
GST_GL_MIXER_LOCK (mix);
mix->out_info = info;
mixpad->in_info = info;
GST_GL_MIXER_UNLOCK (mix);
ret = gst_gl_mixer_update_src_caps (mix);
beach:
return ret;
}
static GstCaps *
gst_gl_mixer_pad_sink_getcaps (GstPad * pad, GstGLMixer * mix, GstCaps * filter)
{
GstCaps *srccaps;
GstStructure *s;
gint i, n;
srccaps = gst_pad_get_current_caps (GST_PAD (mix->srcpad));
if (srccaps == NULL)
srccaps = gst_pad_get_pad_template_caps (GST_PAD (mix->srcpad));
srccaps = gst_caps_make_writable (srccaps);
n = gst_caps_get_size (srccaps);
for (i = 0; i < n; i++) {
s = gst_caps_get_structure (srccaps, i);
gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
"height", GST_TYPE_INT_RANGE, 1, G_MAXINT,
"framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
if (!gst_structure_has_field (s, "pixel-aspect-ratio"))
gst_structure_set (s, "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1,
NULL);
}
GST_DEBUG_OBJECT (pad, "Returning %" GST_PTR_FORMAT, srccaps);
return srccaps;
}
static gboolean
gst_gl_mixer_pad_sink_acceptcaps (GstPad * pad, GstGLMixer * mix,
GstCaps * caps)
{
gboolean ret;
GstCaps *accepted_caps;
gint i, n;
GstStructure *s;
GST_DEBUG_OBJECT (pad, "%" GST_PTR_FORMAT, caps);
accepted_caps = gst_pad_get_current_caps (GST_PAD (mix->srcpad));
if (accepted_caps == NULL)
accepted_caps = gst_pad_get_pad_template_caps (GST_PAD (mix->srcpad));
accepted_caps = gst_caps_make_writable (accepted_caps);
GST_LOG_OBJECT (pad, "src caps %" GST_PTR_FORMAT, accepted_caps);
n = gst_caps_get_size (accepted_caps);
for (i = 0; i < n; i++) {
s = gst_caps_get_structure (accepted_caps, i);
gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
"height", GST_TYPE_INT_RANGE, 1, G_MAXINT,
"framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
gst_structure_remove_field (s, "format");
if (!gst_structure_has_field (s, "pixel-aspect-ratio"))
gst_structure_set (s, "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1,
NULL);
}
ret = gst_caps_can_intersect (caps, accepted_caps);
GST_INFO_OBJECT (pad, "%saccepted caps %" GST_PTR_FORMAT, (ret ? "" : "not "),
caps);
GST_INFO_OBJECT (pad, "acceptable caps are %" GST_PTR_FORMAT, accepted_caps);
gst_caps_unref (accepted_caps);
return ret;
}
static gboolean
gst_gl_mixer_propose_allocation (GstGLMixer * mix,
GstQuery * decide_query, GstQuery * query)
{
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_display (mix, &mix->display))
return FALSE;
if (!mix->context) {
mix->context = gst_gl_context_new (mix->display);
if (!gst_gl_context_create (mix->context, NULL, &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);
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_sink_query (GstCollectPads * pads, GstCollectData * data,
GstQuery * query, GstGLMixer * mix)
{
GstPad *pad = data->pad;
gboolean ret = FALSE;
GST_TRACE ("QUERY %" GST_PTR_FORMAT, query);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_ALLOCATION:
{
GstQuery *decide_query = NULL;
gboolean negotiated;
GST_OBJECT_LOCK (mix);
if (G_UNLIKELY (!(negotiated = 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_CAPS:
{
GstCaps *filter, *caps;
gst_query_parse_caps (query, &filter);
caps = gst_gl_mixer_pad_sink_getcaps (pad, 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 (pad, mix, caps);
gst_query_set_accept_caps_result (query, ret);
ret = TRUE;
break;
}
case GST_QUERY_CONTEXT:
{
ret = gst_gl_handle_context_query ((GstElement *) mix, query,
&mix->display);
break;
}
default:
ret = gst_collect_pads_query_default (pads, data, query, FALSE);
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") "; "
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_%d",
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 (GstPad * pad, GstObject * object,
GstQuery * query);
static gboolean gst_gl_mixer_src_activate_mode (GstPad * pad,
GstObject * parent, GstPadMode mode, gboolean active);
static GstFlowReturn gst_gl_mixer_sink_clip (GstCollectPads * pads,
GstCollectData * data, GstBuffer * buf, GstBuffer ** outbuf,
GstGLMixer * mix);
static GstFlowReturn gst_gl_mixer_collected (GstCollectPads * pads,
GstGLMixer * mix);
static GstPad *gst_gl_mixer_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
static void gst_gl_mixer_release_pad (GstElement * element, GstPad * pad);
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 GstStateChangeReturn gst_gl_mixer_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_gl_mixer_query_caps (GstPad * pad, GstObject * parent,
GstQuery * query);
static gboolean gst_gl_mixer_query_duration (GstGLMixer * mix,
GstQuery * query);
static gboolean gst_gl_mixer_query_latency (GstGLMixer * mix, GstQuery * query);
static gboolean gst_gl_mixer_do_bufferpool (GstGLMixer * mix,
GstCaps * outcaps);
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 gint64 gst_gl_mixer_do_qos (GstGLMixer * mix, GstClockTime timestamp);
static void gst_gl_mixer_update_qos (GstGLMixer * mix, gdouble proportion,
GstClockTimeDiff diff, GstClockTime timestamp);
static void gst_gl_mixer_reset_qos (GstGLMixer * mix);
static void gst_gl_mixer_read_qos (GstGLMixer * mix, gdouble * proportion,
GstClockTime * time);
static void gst_gl_mixer_child_proxy_init (gpointer g_iface,
gpointer iface_data);
#define gst_gl_mixer_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstGLMixer, gst_gl_mixer, GST_TYPE_ELEMENT,
G_IMPLEMENT_INTERFACE (GST_TYPE_CHILD_PROXY, gst_gl_mixer_child_proxy_init);
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "glmixer", 0, "opengl mixer"));
static void gst_gl_mixer_finalize (GObject * object);
static GObject *
gst_gl_mixer_child_proxy_get_child_by_index (GstChildProxy * child_proxy,
guint index)
{
GstGLMixer *mix = GST_GL_MIXER (child_proxy);
GObject *obj;
GST_GL_MIXER_LOCK (mix);
if ((obj = g_slist_nth_data (mix->sinkpads, index)))
gst_object_ref (obj);
GST_GL_MIXER_UNLOCK (mix);
return obj;
}
static guint
gst_gl_mixer_child_proxy_get_children_count (GstChildProxy * child_proxy)
{
guint count = 0;
GstGLMixer *mix = GST_GL_MIXER (child_proxy);
GST_GL_MIXER_LOCK (mix);
count = mix->numpads;
GST_GL_MIXER_UNLOCK (mix);
GST_INFO_OBJECT (mix, "Children Count: %d", count);
return count;
}
static void
gst_gl_mixer_child_proxy_init (gpointer g_iface, gpointer iface_data)
{
GstChildProxyInterface *iface = g_iface;
GST_INFO ("intializing child proxy interface");
iface->get_child_by_index = gst_gl_mixer_child_proxy_get_child_by_index;
iface->get_children_count = gst_gl_mixer_child_proxy_get_children_count;
}
static void
gst_gl_mixer_class_init (GstGLMixerClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
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->request_new_pad =
GST_DEBUG_FUNCPTR (gst_gl_mixer_request_new_pad);
element_class->release_pad = GST_DEBUG_FUNCPTR (gst_gl_mixer_release_pad);
element_class->change_state = GST_DEBUG_FUNCPTR (gst_gl_mixer_change_state);
element_class->set_context = GST_DEBUG_FUNCPTR (gst_gl_mixer_set_context);
/* Register the pad class */
g_type_class_ref (GST_TYPE_GL_MIXER_PAD);
klass->set_caps = NULL;
}
static void
gst_gl_mixer_collect_free (GstGLMixerCollect * mixcol)
{
if (mixcol->buffer) {
gst_buffer_unref (mixcol->buffer);
mixcol->buffer = NULL;
}
}
static void
gst_gl_mixer_reset (GstGLMixer * mix)
{
GstGLMixerPrivate *priv = mix->priv;
GSList *l;
gst_video_info_init (&mix->out_info);
mix->ts_offset = 0;
mix->nframes = 0;
gst_segment_init (&mix->segment, GST_FORMAT_TIME);
mix->segment.position = -1;
/* clean up collect data */
for (l = mix->sinkpads; l; l = l->next) {
GstGLMixerPad *p = l->data;
GstGLMixerCollect *mixcol = p->mixcol;
gst_buffer_replace (&mixcol->buffer, NULL);
mixcol->start_time = -1;
mixcol->end_time = -1;
gst_video_info_init (&p->in_info);
}
mix->newseg_pending = TRUE;
mix->flush_stop_pending = FALSE;
priv->negotiated = FALSE;
}
static void
_free_pad_frame_data (gpointer data)
{
g_slice_free1 (sizeof (GstGLMixerFrameData), data);
}
static void
gst_gl_mixer_init (GstGLMixer * mix)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (mix);
mix->priv = GST_GL_MIXER_GET_PRIVATE (mix);
mix->srcpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"src"), "src");
gst_pad_set_query_function (GST_PAD (mix->srcpad),
GST_DEBUG_FUNCPTR (gst_gl_mixer_src_query));
gst_pad_set_event_function (GST_PAD (mix->srcpad),
GST_DEBUG_FUNCPTR (gst_gl_mixer_src_event));
gst_pad_set_activatemode_function (mix->srcpad,
GST_DEBUG_FUNCPTR (gst_gl_mixer_src_activate_mode));
gst_element_add_pad (GST_ELEMENT (mix), mix->srcpad);
mix->collect = gst_collect_pads_new ();
gst_collect_pads_set_function (mix->collect,
(GstCollectPadsFunction) GST_DEBUG_FUNCPTR (gst_gl_mixer_collected), mix);
gst_collect_pads_set_event_function (mix->collect,
(GstCollectPadsEventFunction) gst_gl_mixer_sink_event, mix);
gst_collect_pads_set_query_function (mix->collect,
(GstCollectPadsQueryFunction) gst_gl_mixer_sink_query, mix);
gst_collect_pads_set_clip_function (mix->collect,
(GstCollectPadsClipFunction) gst_gl_mixer_sink_clip, mix);
g_mutex_init (&mix->lock);
mix->array_buffers = 0;
mix->display = NULL;
mix->fbo = 0;
mix->depthbuffer = 0;
mix->frames = g_ptr_array_new_full (4, _free_pad_frame_data);
mix->array_buffers = g_ptr_array_new_full (4, NULL);
/* initialize variables */
gst_gl_mixer_reset (mix);
}
static void
gst_gl_mixer_finalize (GObject * object)
{
GstGLMixer *mix = GST_GL_MIXER (object);
gst_object_unref (mix->collect);
g_mutex_clear (&mix->lock);
g_ptr_array_free (mix->frames, TRUE);
g_ptr_array_free (mix->array_buffers, TRUE);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_gl_mixer_query_duration (GstGLMixer * mix, GstQuery * query)
{
GValue item = { 0 };
gint64 max;
gboolean res;
GstFormat format;
GstIterator *it;
gboolean done;
/* parse format */
gst_query_parse_duration (query, &format, NULL);
max = -1;
res = TRUE;
done = FALSE;
/* Take maximum of all durations */
it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix));
while (!done) {
GstIteratorResult ires;
ires = gst_iterator_next (it, &item);
switch (ires) {
case GST_ITERATOR_DONE:
done = TRUE;
break;
case GST_ITERATOR_OK:
{
GstPad *pad;
gint64 duration;
pad = g_value_get_object (&item);
/* ask sink peer for duration */
res &= gst_pad_peer_query_duration (pad, format, &duration);
/* take max from all valid return values */
if (res) {
/* valid unknown length, stop searching */
if (duration == -1) {
max = duration;
done = TRUE;
}
/* else see if bigger than current max */
else if (duration > max)
max = duration;
}
g_value_reset (&item);
break;
}
case GST_ITERATOR_RESYNC:
max = -1;
res = TRUE;
gst_iterator_resync (it);
break;
default:
res = FALSE;
done = TRUE;
break;
}
}
g_value_reset (&item);
gst_iterator_free (it);
if (res) {
/* and store the max */
GST_DEBUG_OBJECT (mix, "Total duration in format %s: %"
GST_TIME_FORMAT, gst_format_get_name (format), GST_TIME_ARGS (max));
gst_query_set_duration (query, format, max);
}
return res;
}
static gboolean
gst_gl_mixer_query_caps (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstCaps *filter, *caps;
GstGLMixer *mix = GST_GL_MIXER (parent);
GstStructure *s;
gint n;
gst_query_parse_caps (query, &filter);
if (GST_VIDEO_INFO_FORMAT (&mix->out_info) != GST_VIDEO_FORMAT_UNKNOWN) {
caps = gst_pad_get_current_caps (mix->srcpad);
} else {
caps = gst_pad_get_pad_template_caps (mix->srcpad);
}
caps = gst_caps_make_writable (caps);
n = gst_caps_get_size (caps) - 1;
for (; n >= 0; n--) {
s = gst_caps_get_structure (caps, n);
gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
"height", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);
if (GST_VIDEO_INFO_FPS_D (&mix->out_info) != 0) {
gst_structure_set (s,
"framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
}
}
gst_query_set_caps_result (query, caps);
return TRUE;
}
static gboolean
gst_gl_mixer_query_latency (GstGLMixer * mix, GstQuery * query)
{
GValue item = { 0 };
GstClockTime min, max;
gboolean live;
gboolean res;
GstIterator *it;
gboolean done;
res = TRUE;
done = FALSE;
live = FALSE;
min = 0;
max = GST_CLOCK_TIME_NONE;
/* Take maximum of all latency values */
it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix));
while (!done) {
GstIteratorResult ires;
ires = gst_iterator_next (it, &item);
switch (ires) {
case GST_ITERATOR_DONE:
done = TRUE;
break;
case GST_ITERATOR_OK:
{
GstPad *pad;
GstQuery *peerquery;
GstClockTime min_cur, max_cur;
gboolean live_cur;
pad = g_value_get_object (&item);
peerquery = gst_query_new_latency ();
/* Ask peer for latency */
res &= gst_pad_peer_query (pad, peerquery);
/* take max from all valid return values */
if (res) {
gst_query_parse_latency (peerquery, &live_cur, &min_cur, &max_cur);
if (min_cur > min)
min = min_cur;
if (max_cur != GST_CLOCK_TIME_NONE &&
((max != GST_CLOCK_TIME_NONE && max_cur > max) ||
(max == GST_CLOCK_TIME_NONE)))
max = max_cur;
live = live || live_cur;
}
gst_query_unref (peerquery);
g_value_reset (&item);
break;
}
case GST_ITERATOR_RESYNC:
live = FALSE;
min = 0;
max = GST_CLOCK_TIME_NONE;
res = TRUE;
gst_iterator_resync (it);
break;
default:
res = FALSE;
done = TRUE;
break;
}
}
g_value_unset (&item);
gst_iterator_free (it);
if (res) {
/* store the results */
GST_DEBUG_OBJECT (mix, "Calculated total latency: live %s, min %"
GST_TIME_FORMAT ", max %" GST_TIME_FORMAT,
(live ? "yes" : "no"), GST_TIME_ARGS (min), GST_TIME_ARGS (max));
gst_query_set_latency (query, live, min, max);
}
return res;
}
static void
gst_gl_mixer_update_qos (GstGLMixer * mix, gdouble proportion,
GstClockTimeDiff diff, GstClockTime timestamp)
{
GST_DEBUG_OBJECT (mix,
"Updating QoS: proportion %lf, diff %s%" GST_TIME_FORMAT ", timestamp %"
GST_TIME_FORMAT, proportion, (diff < 0) ? "-" : "",
GST_TIME_ARGS (ABS (diff)), GST_TIME_ARGS (timestamp));
GST_OBJECT_LOCK (mix);
mix->proportion = proportion;
if (G_LIKELY (timestamp != GST_CLOCK_TIME_NONE)) {
if (G_UNLIKELY (diff > 0))
mix->earliest_time =
timestamp + 2 * diff + gst_util_uint64_scale_int (GST_SECOND,
GST_VIDEO_INFO_FPS_D (&mix->out_info),
GST_VIDEO_INFO_FPS_N (&mix->out_info));
else
mix->earliest_time = timestamp + diff;
} else {
mix->earliest_time = GST_CLOCK_TIME_NONE;
}
GST_OBJECT_UNLOCK (mix);
}
static void
gst_gl_mixer_reset_qos (GstGLMixer * mix)
{
gst_gl_mixer_update_qos (mix, 0.5, 0, GST_CLOCK_TIME_NONE);
mix->qos_processed = mix->qos_dropped = 0;
}
static void
gst_gl_mixer_read_qos (GstGLMixer * mix, gdouble * proportion,
GstClockTime * time)
{
GST_OBJECT_LOCK (mix);
*proportion = mix->proportion;
*time = mix->earliest_time;
GST_OBJECT_UNLOCK (mix);
}
static void
gst_gl_mixer_set_context (GstElement * element, GstContext * context)
{
GstGLMixer *mix = GST_GL_MIXER (element);
gst_gl_handle_set_context (element, context, &mix->display);
}
static gboolean
gst_gl_mixer_activate (GstGLMixer * mix, gboolean active)
{
gboolean result = TRUE;
if (active) {
if (!gst_gl_ensure_display (mix, &mix->display))
result = FALSE;
}
return result;
}
static gboolean
gst_gl_mixer_src_activate_mode (GstPad * pad, GstObject * parent,
GstPadMode mode, gboolean active)
{
gboolean result = FALSE;
GstGLMixer *mix;
mix = GST_GL_MIXER (parent);
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_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstGLMixer *mix = GST_GL_MIXER (parent);
gboolean res = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONTEXT:
{
res = gst_gl_handle_context_query ((GstElement *) mix, query,
&mix->display);
break;
}
case GST_QUERY_POSITION:
{
GstFormat format;
gst_query_parse_position (query, &format, NULL);
switch (format) {
case GST_FORMAT_TIME:
gst_query_set_position (query, format,
gst_segment_to_stream_time (&mix->segment, GST_FORMAT_TIME,
mix->segment.position));
res = TRUE;
break;
default:
break;
}
break;
}
case GST_QUERY_DURATION:
res = gst_gl_mixer_query_duration (mix, query);
break;
case GST_QUERY_LATENCY:
res = gst_gl_mixer_query_latency (mix, query);
break;
case GST_QUERY_CAPS:
res = gst_gl_mixer_query_caps (pad, parent, query);
break;
default:
/* FIXME, needs a custom query handler because we have multiple
* sinkpads, send to the master pad until then */
res = FALSE;
break;
}
return res;
}
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;
gst_query_parse_allocation (query, &caps, NULL);
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 (!gst_gl_ensure_display (mix, &mix->display))
return FALSE;
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);
} 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 = GST_GL_PLATFORM_NONE;
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->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 (&mix->out_info);
out_height = GST_VIDEO_INFO_HEIGHT (&mix->out_info);
if (!gst_gl_context_gen_fbo (mix->context, out_width, out_height,
&mix->fbo, &mix->depthbuffer))
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);
if (mixer_class->set_caps)
mixer_class->set_caps (mix, caps);
if (!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);
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;
/* 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 (mix->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;
}
}
static gboolean
gst_gl_mixer_src_setcaps (GstPad * pad, GstGLMixer * mix, GstCaps * caps)
{
GstGLMixerPrivate *priv = mix->priv;
GstVideoInfo info;
gboolean ret = TRUE;
GST_INFO_OBJECT (mix, "set src caps: %" GST_PTR_FORMAT, caps);
if (!gst_video_info_from_caps (&info, caps)) {
ret = FALSE;
goto done;
}
GST_GL_MIXER_LOCK (mix);
if (GST_VIDEO_INFO_FPS_N (&mix->out_info) != GST_VIDEO_INFO_FPS_N (&info) ||
GST_VIDEO_INFO_FPS_D (&mix->out_info) != GST_VIDEO_INFO_FPS_D (&info)) {
if (mix->segment.position != -1) {
mix->ts_offset = mix->segment.position - mix->segment.start;
mix->nframes = 0;
}
gst_gl_mixer_reset_qos (mix);
}
mix->out_info = info;
GST_GL_MIXER_UNLOCK (mix);
ret = gst_pad_set_caps (mix->srcpad, caps);
if (ret)
ret = gst_gl_mixer_do_bufferpool (mix, caps);
done:
priv->negotiated = ret;
return ret;
}
static GstPad *
gst_gl_mixer_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
{
GstGLMixer *mix;
GstGLMixerPad *mixpad;
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
gint serial = 0;
gchar *name = NULL;
GstGLMixerCollect *mixcol = NULL;
mix = GST_GL_MIXER (element);
if (templ != gst_element_class_get_pad_template (klass, "sink_%d"))
return NULL;
GST_GL_MIXER_LOCK (mix);
if (req_name == NULL || strlen (req_name) < 6
|| !g_str_has_prefix (req_name, "sink_")) {
/* no name given when requesting the pad, use next available int */
serial = mix->next_sinkpad++;
} else {
/* parse serial number from requested padname */
serial = g_ascii_strtoull (&req_name[5], NULL, 10);
if (serial >= mix->next_sinkpad)
mix->next_sinkpad = serial + 1;
}
/* create new pad with the name */
name = g_strdup_printf ("sink_%d", serial);
mixpad = g_object_new (GST_TYPE_GL_MIXER_PAD, "name", name, "direction",
templ->direction, "template", templ, NULL);
g_free (name);
mixcol = (GstGLMixerCollect *)
gst_collect_pads_add_pad (mix->collect, GST_PAD (mixpad),
sizeof (GstGLMixerCollect),
(GstCollectDataDestroyNotify) gst_gl_mixer_collect_free, TRUE);
/* Keep track of each other */
mixcol->mixpad = mixpad;
mixpad->mixcol = mixcol;
mixcol->start_time = -1;
mixcol->end_time = -1;
/* Keep an internal list of mixpads for zordering */
mix->sinkpads = g_slist_append (mix->sinkpads, mixpad);
mix->numpads++;
GST_DEBUG_OBJECT (element, "Adding pad %s", GST_PAD_NAME (mixpad));
/* add the pad to the element */
gst_element_add_pad (element, GST_PAD (mixpad));
gst_child_proxy_child_added (GST_CHILD_PROXY (mix), G_OBJECT (mixpad),
GST_OBJECT_NAME (mixpad));
g_ptr_array_set_size (mix->array_buffers, mix->numpads);
g_ptr_array_set_size (mix->frames, mix->numpads);
mix->frames->pdata[mix->numpads - 1] = g_slice_new0 (GstGLMixerFrameData);
GST_GL_MIXER_UNLOCK (mix);
return GST_PAD (mixpad);
}
static void
gst_gl_mixer_release_pad (GstElement * element, GstPad * pad)
{
GstGLMixer *mix;
GstGLMixerPad *mixpad;
gboolean update_caps;
mix = GST_GL_MIXER (element);
GST_GL_MIXER_LOCK (mix);
if (G_UNLIKELY (g_slist_find (mix->sinkpads, pad) == NULL)) {
g_warning ("Unknown pad %s", GST_PAD_NAME (pad));
goto error;
}
mixpad = GST_GL_MIXER_PAD (pad);
mix->sinkpads = g_slist_remove (mix->sinkpads, pad);
gst_child_proxy_child_removed (GST_CHILD_PROXY (mix), G_OBJECT (mixpad),
GST_OBJECT_NAME (mixpad));
mix->numpads--;
g_ptr_array_set_size (mix->array_buffers, mix->numpads);
g_ptr_array_set_size (mix->frames, mix->numpads);
update_caps =
GST_VIDEO_INFO_FORMAT (&mix->out_info) != GST_VIDEO_FORMAT_UNKNOWN;
GST_GL_MIXER_UNLOCK (mix);
gst_collect_pads_remove_pad (mix->collect, pad);
if (update_caps)
gst_gl_mixer_update_src_caps (mix);
gst_element_remove_pad (element, pad);
return;
error:
GST_GL_MIXER_UNLOCK (mix);
}
/* try to get a buffer on all pads. As long as the queued value is
* negative, we skip buffers */
static gint
gst_gl_mixer_fill_queues (GstGLMixer * mix,
GstClockTime output_start_time, GstClockTime output_end_time)
{
GSList *l;
gboolean eos = TRUE;
gboolean need_more_data = FALSE;
for (l = mix->sinkpads; l; l = l->next) {
GstGLMixerPad *pad = l->data;
GstGLMixerCollect *mixcol = pad->mixcol;
GstSegment *segment = &pad->mixcol->collect.segment;
GstBuffer *buf;
buf = gst_collect_pads_peek (mix->collect, &mixcol->collect);
if (buf) {
GstClockTime start_time, end_time;
start_time = GST_BUFFER_TIMESTAMP (buf);
if (start_time == -1) {
gst_buffer_unref (buf);
GST_ERROR_OBJECT (pad, "Need timestamped buffers!");
return -2;
}
/* FIXME: Make all this work with negative rates */
if ((mixcol->buffer && start_time < GST_BUFFER_TIMESTAMP (mixcol->buffer))
|| (mixcol->queued
&& start_time < GST_BUFFER_TIMESTAMP (mixcol->queued))) {
GST_WARNING_OBJECT (pad, "Buffer from the past, dropping");
gst_buffer_unref (buf);
buf = gst_collect_pads_pop (mix->collect, &mixcol->collect);
gst_buffer_unref (buf);
need_more_data = TRUE;
continue;
}
if (mixcol->queued) {
end_time = start_time - GST_BUFFER_TIMESTAMP (mixcol->queued);
start_time = GST_BUFFER_TIMESTAMP (mixcol->queued);
gst_buffer_unref (buf);
buf = gst_buffer_ref (mixcol->queued);
} else {
end_time = GST_BUFFER_DURATION (buf);
if (end_time == -1) {
mixcol->queued = buf;
need_more_data = TRUE;
continue;
}
}
g_assert (start_time != -1 && end_time != -1);
end_time += start_time; /* convert from duration to position */
if (mixcol->end_time != -1 && mixcol->end_time > end_time) {
GST_WARNING_OBJECT (pad, "Buffer from the past, dropping");
if (buf == mixcol->queued) {
gst_buffer_unref (buf);
gst_buffer_replace (&mixcol->queued, NULL);
} else {
gst_buffer_unref (buf);
buf = gst_collect_pads_pop (mix->collect, &mixcol->collect);
gst_buffer_unref (buf);
}
need_more_data = TRUE;
continue;
}
/* Check if it's inside the segment */
if (start_time >= segment->stop || end_time < segment->start) {
GST_DEBUG_OBJECT (pad, "Buffer outside the segment");
if (buf == mixcol->queued) {
gst_buffer_unref (buf);
gst_buffer_replace (&mixcol->queued, NULL);
} else {
gst_buffer_unref (buf);
buf = gst_collect_pads_pop (mix->collect, &mixcol->collect);
gst_buffer_unref (buf);
}
need_more_data = TRUE;
continue;
}
/* Clip to segment and convert to running time */
start_time = MAX (start_time, segment->start);
if (segment->stop != -1)
end_time = MIN (end_time, segment->stop);
start_time =
gst_segment_to_running_time (segment, GST_FORMAT_TIME, start_time);
end_time =
gst_segment_to_running_time (segment, GST_FORMAT_TIME, end_time);
g_assert (start_time != -1 && end_time != -1);
/* Convert to the output segment rate */
if (ABS (mix->segment.rate) != 1.0) {
start_time *= ABS (mix->segment.rate);
end_time *= ABS (mix->segment.rate);
}
if (end_time >= output_start_time && start_time < output_end_time) {
GST_DEBUG_OBJECT (pad,
"Taking new buffer with start time %" GST_TIME_FORMAT,
GST_TIME_ARGS (start_time));
gst_buffer_replace (&mixcol->buffer, buf);
mixcol->start_time = start_time;
mixcol->end_time = end_time;
if (buf == mixcol->queued) {
gst_buffer_unref (buf);
gst_buffer_replace (&mixcol->queued, NULL);
} else {
gst_buffer_unref (buf);
buf = gst_collect_pads_pop (mix->collect, &mixcol->collect);
gst_buffer_unref (buf);
}
eos = FALSE;
} else if (start_time >= output_end_time) {
GST_DEBUG_OBJECT (pad, "Keeping buffer until %" GST_TIME_FORMAT,
GST_TIME_ARGS (start_time));
gst_buffer_unref (buf);
eos = FALSE;
} else {
GST_DEBUG_OBJECT (pad, "Too old buffer -- dropping");
if (buf == mixcol->queued) {
gst_buffer_unref (buf);
gst_buffer_replace (&mixcol->queued, NULL);
} else {
gst_buffer_unref (buf);
buf = gst_collect_pads_pop (mix->collect, &mixcol->collect);
gst_buffer_unref (buf);
}
need_more_data = TRUE;
continue;
}
} else {
if (mixcol->end_time != -1) {
if (mixcol->end_time <= output_start_time) {
gst_buffer_replace (&mixcol->buffer, NULL);
mixcol->start_time = mixcol->end_time = -1;
if (!GST_COLLECT_PADS_STATE_IS_SET (mixcol,
GST_COLLECT_PADS_STATE_EOS))
need_more_data = TRUE;
} else {
eos = FALSE;
}
}
}
}
if (need_more_data)
return 0;
if (eos)
return -1;
return 1;
}
gboolean
gst_gl_mixer_process_textures (GstGLMixer * mix, GstBuffer * outbuf)
{
GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
GSList *walk = mix->sinkpads;
GstVideoFrame out_frame;
gboolean out_gl_wrapped = FALSE;
guint out_tex;
guint array_index = 0;
guint i;
gboolean res = TRUE;
GST_TRACE ("Processing buffers");
if (!gst_video_frame_map (&out_frame, &mix->out_info, outbuf,
GST_MAP_WRITE | GST_MAP_GL)) {
return FALSE;
}
if (gst_is_gl_memory (out_frame.map[0].memory)) {
out_tex = *(guint *) out_frame.data[0];
} else {
GST_INFO ("Output Buffer does not contain correct memory, "
"attempting to wrap for download");
out_tex = mix->out_tex_id;;
if (!mix->download)
mix->download = gst_gl_download_new (mix->context);
gst_gl_download_set_format (mix->download, &out_frame.info);
out_gl_wrapped = TRUE;
}
while (walk) { /* We walk with this list because it's ordered */
GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data);
GstGLMixerCollect *mixcol = pad->mixcol;
GstGLMixerFrameData *frame;
frame = g_ptr_array_index (mix->frames, array_index);
frame->pad = pad;
frame->texture = 0;
walk = g_slist_next (walk);
if (mixcol->buffer != NULL) {
GstClockTime timestamp;
gint64 stream_time;
GstSegment *seg;
guint in_tex;
seg = &mixcol->collect.segment;
timestamp = GST_BUFFER_TIMESTAMP (mixcol->buffer);
stream_time =
gst_segment_to_stream_time (seg, GST_FORMAT_TIME, timestamp);
/* sync object properties on stream time */
if (GST_CLOCK_TIME_IS_VALID (stream_time))
gst_object_sync_values (GST_OBJECT (pad), stream_time);
if (!pad->upload) {
pad->upload = gst_gl_upload_new (mix->context);
gst_gl_upload_set_format (pad->upload, &pad->in_info);
}
if (!gst_gl_upload_perform_with_buffer (pad->upload, mixcol->buffer,
&in_tex)) {
++array_index;
pad->mapped = FALSE;
continue;
}
pad->mapped = TRUE;
frame->texture = in_tex;
}
++array_index;
}
mix_class->process_textures (mix, mix->frames, out_tex);
if (out_gl_wrapped) {
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 = 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_slist_next (walk);
i++;
}
gst_video_frame_unmap (&out_frame);
return res;
}
static void
gst_gl_mixer_process_buffers (GstGLMixer * mix, GstBuffer * outbuf)
{
GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
GSList *walk = mix->sinkpads;
guint array_index = 0;
while (walk) { /* We walk with this list because it's ordered */
GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data);
GstGLMixerCollect *mixcol = pad->mixcol;
walk = g_slist_next (walk);
if (mixcol->buffer != NULL) {
GstClockTime timestamp;
gint64 stream_time;
GstSegment *seg;
seg = &mixcol->collect.segment;
timestamp = GST_BUFFER_TIMESTAMP (mixcol->buffer);
stream_time =
gst_segment_to_stream_time (seg, GST_FORMAT_TIME, timestamp);
/* sync object properties on stream time */
if (GST_CLOCK_TIME_IS_VALID (stream_time))
gst_object_sync_values (GST_OBJECT (pad), stream_time);
/* put buffer into array */
mix->array_buffers->pdata[array_index] = mixcol->buffer;
}
++array_index;
}
mix_class->process_buffers (mix, mix->array_buffers, outbuf);
}
/* Perform qos calculations before processing the next frame. Returns TRUE if
* the frame should be processed, FALSE if the frame can be dropped entirely */
static gint64
gst_gl_mixer_do_qos (GstGLMixer * mix, GstClockTime timestamp)
{
GstClockTime qostime, earliest_time;
gdouble proportion;
gint64 jitter;
/* no timestamp, can't do QoS => process frame */
if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (timestamp))) {
GST_LOG_OBJECT (mix, "invalid timestamp, can't do QoS, process frame");
return -1;
}
/* get latest QoS observation values */
gst_gl_mixer_read_qos (mix, &proportion, &earliest_time);
/* skip qos if we have no observation (yet) => process frame */
if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (earliest_time))) {
GST_LOG_OBJECT (mix, "no observation yet, process frame");
return -1;
}
/* qos is done on running time */
qostime =
gst_segment_to_running_time (&mix->segment, GST_FORMAT_TIME, timestamp);
/* see how our next timestamp relates to the latest qos timestamp */
GST_LOG_OBJECT (mix, "qostime %" GST_TIME_FORMAT ", earliest %"
GST_TIME_FORMAT, GST_TIME_ARGS (qostime), GST_TIME_ARGS (earliest_time));
jitter = GST_CLOCK_DIFF (qostime, earliest_time);
if (qostime != GST_CLOCK_TIME_NONE && jitter > 0) {
GST_DEBUG_OBJECT (mix, "we are late, drop frame");
return jitter;
}
GST_LOG_OBJECT (mix, "process frame");
return jitter;
}
static GstFlowReturn
gst_gl_mixer_collected (GstCollectPads * pads, GstGLMixer * mix)
{
GstGLMixerClass *mix_class;
GstFlowReturn ret;
GstClockTime output_start_time, output_end_time;
GstBuffer *outbuf = NULL;
gint res;
gint64 jitter;
g_return_val_if_fail (GST_IS_GL_MIXER (mix), GST_FLOW_ERROR);
mix_class = GST_GL_MIXER_GET_CLASS (mix);
/* If we're not negotiated yet... */
if (GST_VIDEO_INFO_FORMAT (&mix->out_info) == GST_VIDEO_FORMAT_UNKNOWN) {
GST_ELEMENT_ERROR (mix, CORE, NEGOTIATION, ("not negotiated"), (NULL));
return GST_FLOW_NOT_NEGOTIATED;
}
if (g_atomic_int_compare_and_exchange (&mix->flush_stop_pending, TRUE, FALSE)) {
GST_DEBUG_OBJECT (mix, "pending flush stop");
gst_pad_push_event (mix->srcpad, gst_event_new_flush_stop (TRUE));
}
GST_GL_MIXER_LOCK (mix);
if (mix->newseg_pending) {
GST_DEBUG_OBJECT (mix, "Sending NEWSEGMENT event");
if (!gst_pad_push_event (mix->srcpad,
gst_event_new_segment (&mix->segment))) {
ret = GST_FLOW_ERROR;
goto error;
}
mix->newseg_pending = FALSE;
}
if (mix->segment.position == -1)
output_start_time = mix->segment.start;
else
output_start_time = mix->segment.position;
if (output_start_time >= mix->segment.stop) {
GST_DEBUG_OBJECT (mix, "Segment done");
gst_pad_push_event (mix->srcpad, gst_event_new_eos ());
ret = GST_FLOW_EOS;
goto error;
}
output_end_time =
mix->ts_offset + gst_util_uint64_scale (mix->nframes + 1,
GST_SECOND * GST_VIDEO_INFO_FPS_D (&mix->out_info),
GST_VIDEO_INFO_FPS_N (&mix->out_info));
if (mix->segment.stop != -1)
output_end_time = MIN (output_end_time, mix->segment.stop);
GST_LOG ("got output times start:%" GST_TIME_FORMAT " end:%" GST_TIME_FORMAT,
GST_TIME_ARGS (output_start_time), GST_TIME_ARGS (output_end_time));
res = gst_gl_mixer_fill_queues (mix, output_start_time, output_end_time);
if (res == 0) {
GST_DEBUG_OBJECT (mix, "Need more data for decisions");
ret = GST_FLOW_OK;
goto error;
} else if (res == -1) {
GST_DEBUG_OBJECT (mix, "All sinkpads are EOS -- forwarding");
gst_pad_push_event (mix->srcpad, gst_event_new_eos ());
ret = GST_FLOW_EOS;
goto error;
} else if (res == -2) {
GST_ERROR_OBJECT (mix, "Error collecting buffers");
ret = GST_FLOW_ERROR;
goto error;
}
jitter = gst_gl_mixer_do_qos (mix, output_start_time);
if (jitter <= 0) {
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"));
ret = GST_FLOW_ERROR;
goto error;
}
mix->priv->pool_active = TRUE;
}
ret = gst_buffer_pool_acquire_buffer (mix->priv->pool, &outbuf, NULL);
if (ret != GST_FLOW_OK)
goto error;
GST_BUFFER_TIMESTAMP (outbuf) = output_start_time;
GST_BUFFER_DURATION (outbuf) = output_end_time - output_start_time;
if (!mix_class->process_buffers && !mix_class->process_textures) {
ret = GST_FLOW_ERROR;
g_assert_not_reached ();
goto error;
}
if (mix_class->process_buffers)
gst_gl_mixer_process_buffers (mix, outbuf);
else if (mix_class->process_textures)
gst_gl_mixer_process_textures (mix, outbuf);
mix->qos_processed++;
} else {
GstMessage *msg;
mix->qos_dropped++;
/* TODO: live */
msg =
gst_message_new_qos (GST_OBJECT_CAST (mix), FALSE,
gst_segment_to_running_time (&mix->segment, GST_FORMAT_TIME,
output_start_time), gst_segment_to_stream_time (&mix->segment,
GST_FORMAT_TIME, output_start_time), output_start_time,
output_end_time - output_start_time);
gst_message_set_qos_values (msg, jitter, mix->proportion, 1000000);
gst_message_set_qos_stats (msg, GST_FORMAT_BUFFERS, mix->qos_processed,
mix->qos_dropped);
gst_element_post_message (GST_ELEMENT_CAST (mix), msg);
ret = GST_FLOW_OK;
}
mix->segment.position = output_end_time;
mix->nframes++;
GST_GL_MIXER_UNLOCK (mix);
if (outbuf) {
GST_LOG_OBJECT (mix,
"Pushing buffer with ts %" GST_TIME_FORMAT " and duration %"
GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)));
ret = gst_pad_push (mix->srcpad, outbuf);
}
done:
return ret;
/* ERRORS */
error:
{
GST_GL_MIXER_UNLOCK (mix);
goto done;
}
}
static gboolean
forward_event_func (GValue * item, GValue * ret, GstEvent * event)
{
GstPad *pad = g_value_get_object (item);
gst_event_ref (event);
GST_LOG_OBJECT (pad, "About to send event %s", GST_EVENT_TYPE_NAME (event));
if (!gst_pad_push_event (pad, event)) {
g_value_set_boolean (ret, FALSE);
GST_WARNING_OBJECT (pad, "Sending event %p (%s) failed.",
event, GST_EVENT_TYPE_NAME (event));
} else {
GST_LOG_OBJECT (pad, "Sent event %p (%s).",
event, GST_EVENT_TYPE_NAME (event));
}
return TRUE;
}
/* forwards the event to all sinkpads, takes ownership of the
* event
*
* Returns: TRUE if the event could be forwarded on all
* sinkpads.
*/
static gboolean
gst_gl_mixer_push_sink_event (GstGLMixer * mix, GstEvent * event)
{
GstIterator *it;
GValue vret = { 0 };
GST_LOG_OBJECT (mix, "Forwarding event %p (%s)", event,
GST_EVENT_TYPE_NAME (event));
g_value_init (&vret, G_TYPE_BOOLEAN);
g_value_set_boolean (&vret, TRUE);
it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix));
gst_iterator_fold (it, (GstIteratorFoldFunction) forward_event_func, &vret,
event);
gst_iterator_free (it);
gst_event_unref (event);
return g_value_get_boolean (&vret);
}
static GstFlowReturn
gst_gl_mixer_sink_clip (GstCollectPads * pads,
GstCollectData * data, GstBuffer * buf, GstBuffer ** outbuf,
GstGLMixer * mix)
{
GstGLMixerPad *pad = GST_GL_MIXER_PAD (data->pad);
GstGLMixerCollect *mixcol = pad->mixcol;
GstClockTime start_time, end_time;
start_time = GST_BUFFER_TIMESTAMP (buf);
if (start_time == -1) {
GST_ERROR_OBJECT (pad, "Timestamped buffers required!");
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
end_time = GST_BUFFER_DURATION (buf);
if (end_time == -1)
end_time =
gst_util_uint64_scale_int (GST_SECOND,
GST_VIDEO_INFO_FPS_D (&pad->in_info),
GST_VIDEO_INFO_FPS_N (&pad->in_info));
if (end_time == -1) {
*outbuf = buf;
return GST_FLOW_OK;
}
start_time = MAX (start_time, mixcol->collect.segment.start);
start_time =
gst_segment_to_running_time (&mixcol->collect.segment,
GST_FORMAT_TIME, start_time);
end_time += GST_BUFFER_TIMESTAMP (buf);
if (mixcol->collect.segment.stop != -1)
end_time = MIN (end_time, mixcol->collect.segment.stop);
end_time =
gst_segment_to_running_time (&mixcol->collect.segment,
GST_FORMAT_TIME, end_time);
/* Convert to the output segment rate */
if (ABS (mix->segment.rate) != 1.0) {
start_time *= ABS (mix->segment.rate);
end_time *= ABS (mix->segment.rate);
}
if (mixcol->buffer != NULL && end_time < mixcol->end_time) {
gst_buffer_unref (buf);
*outbuf = NULL;
return GST_FLOW_OK;
}
*outbuf = buf;
return GST_FLOW_OK;
}
static gboolean
gst_gl_mixer_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstGLMixer *mix = GST_GL_MIXER (parent);
gboolean result;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_QOS:
{
GstQOSType type;
GstClockTimeDiff diff;
GstClockTime timestamp;
gdouble proportion;
gst_event_parse_qos (event, &type, &proportion, &diff, &timestamp);
gst_gl_mixer_update_qos (mix, proportion, diff, timestamp);
result = gst_gl_mixer_push_sink_event (mix, event);
break;
}
case GST_EVENT_SEEK:
{
gdouble rate;
GstFormat fmt;
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
GSList *l;
gdouble abs_rate;
/* parse the seek parameters */
gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
&start, &stop_type, &stop);
if (rate <= 0.0) {
GST_ERROR_OBJECT (mix, "Negative rates not supported yet");
result = FALSE;
gst_event_unref (event);
break;
}
GST_DEBUG_OBJECT (mix, "Handling SEEK event");
/* check if we are flushing */
if (flags & GST_SEEK_FLAG_FLUSH) {
/* flushing seek, start flush downstream, the flush will be done
* when all pads received a FLUSH_STOP. */
gst_pad_push_event (mix->srcpad, gst_event_new_flush_start ());
/* make sure we accept nothing anymore and return WRONG_STATE */
gst_collect_pads_set_flushing (mix->collect, TRUE);
}
/* now wait for the collected to be finished and mark a new
* segment */
GST_COLLECT_PADS_STREAM_LOCK (mix->collect);
abs_rate = ABS (rate);
GST_GL_MIXER_LOCK (mix);
for (l = mix->sinkpads; l; l = l->next) {
GstGLMixerPad *p = l->data;
if (flags & GST_SEEK_FLAG_FLUSH) {
gst_buffer_replace (&p->mixcol->buffer, NULL);
p->mixcol->start_time = p->mixcol->end_time = -1;
continue;
}
/* Convert to the output segment rate */
if (ABS (mix->segment.rate) != abs_rate) {
if (ABS (mix->segment.rate) != 1.0 && p->mixcol->buffer) {
p->mixcol->start_time /= ABS (mix->segment.rate);
p->mixcol->end_time /= ABS (mix->segment.rate);
}
if (abs_rate != 1.0 && p->mixcol->buffer) {
p->mixcol->start_time *= abs_rate;
p->mixcol->end_time *= abs_rate;
}
}
}
GST_GL_MIXER_UNLOCK (mix);
gst_segment_do_seek (&mix->segment, rate, fmt, flags, start_type, start,
stop_type, stop, NULL);
mix->segment.position = -1;
mix->ts_offset = 0;
mix->nframes = 0;
mix->newseg_pending = TRUE;
if (flags & GST_SEEK_FLAG_FLUSH) {
gst_collect_pads_set_flushing (mix->collect, FALSE);
/* we can't send FLUSH_STOP here since upstream could start pushing data
* after we unlock mix->collect.
* We set flush_stop_pending to TRUE instead and send FLUSH_STOP after
* forwarding the seek upstream or from gst_gl_mixer_collected,
* whichever happens first.
*/
mix->flush_stop_pending = TRUE;
}
GST_COLLECT_PADS_STREAM_UNLOCK (mix->collect);
gst_gl_mixer_reset_qos (mix);
result = gst_gl_mixer_push_sink_event (mix, event);
if (g_atomic_int_compare_and_exchange (&mix->flush_stop_pending, TRUE,
FALSE)) {
GST_DEBUG_OBJECT (mix, "pending flush stop");
gst_pad_push_event (mix->srcpad, gst_event_new_flush_stop (TRUE));
}
break;
}
case GST_EVENT_NAVIGATION:
/* navigation is rather pointless. */
result = FALSE;
gst_event_unref (event);
break;
default:
/* just forward the rest for now */
result = gst_gl_mixer_push_sink_event (mix, event);
break;
}
return result;
}
static gboolean
gst_gl_mixer_sink_event (GstCollectPads * pads, GstCollectData * cdata,
GstEvent * event, GstGLMixer * mix)
{
GstGLMixerPad *pad = GST_GL_MIXER_PAD (cdata->pad);
gboolean ret = TRUE;
GST_DEBUG_OBJECT (pad, "Got %s event on pad %s:%s",
GST_EVENT_TYPE_NAME (event), GST_DEBUG_PAD_NAME (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
ret =
gst_gl_mixer_pad_sink_setcaps (GST_PAD (pad), GST_OBJECT (mix), caps);
gst_event_unref (event);
event = NULL;
break;
}
case GST_EVENT_SEGMENT:{
GstSegment seg;
gst_event_copy_segment (event, &seg);
g_assert (seg.format == GST_FORMAT_TIME);
break;
}
case GST_EVENT_FLUSH_STOP:
mix->newseg_pending = TRUE;
mix->flush_stop_pending = FALSE;
gst_gl_mixer_reset_qos (mix);
gst_buffer_replace (&pad->mixcol->buffer, NULL);
pad->mixcol->start_time = -1;
pad->mixcol->end_time = -1;
gst_segment_init (&mix->segment, GST_FORMAT_TIME);
mix->segment.position = -1;
mix->ts_offset = 0;
mix->nframes = 0;
break;
default:
break;
}
if (event != NULL)
return gst_collect_pads_event_default (pads, cdata, event, FALSE);
return ret;
}
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 GstStateChangeReturn
gst_gl_mixer_change_state (GstElement * element, GstStateChange transition)
{
GstGLMixer *mix;
GstStateChangeReturn ret;
GstGLMixerClass *mixer_class;
g_return_val_if_fail (GST_IS_GL_MIXER (element), GST_STATE_CHANGE_FAILURE);
mix = GST_GL_MIXER (element);
mixer_class = GST_GL_MIXER_GET_CLASS (mix);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
{
GST_LOG_OBJECT (mix, "starting collectpads");
gst_collect_pads_start (mix->collect);
break;
}
case GST_STATE_CHANGE_PAUSED_TO_READY:
{
GSList *walk = mix->sinkpads;
GST_LOG_OBJECT (mix, "stopping collectpads");
gst_collect_pads_stop (mix->collect);
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;
}
while (walk) {
GstGLMixerPad *pad = (GstGLMixerPad *) (walk->data);
if (pad->upload) {
gst_object_unref (pad->upload);
pad->upload = NULL;
}
walk = walk->next;
}
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;
}
break;
}
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_gl_mixer_reset (mix);
break;
default:
break;
}
return ret;
}
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