int
main (int argc, char **argv)
{
#ifdef WIN32
HGLRC sdl_gl_context = 0;
HDC sdl_dc = 0;
#else
SDL_SysWMinfo info;
Display *sdl_display = NULL;
Window sdl_win = 0;
GLXContext sdl_gl_context = NULL;
#endif
GMainLoop *loop = NULL;
GstPipeline *pipeline = NULL;
GstBus *bus = NULL;
GstElement *glimagesink = NULL;
const gchar *platform;
/* Initialize SDL for video output */
if (SDL_Init (SDL_INIT_VIDEO) < 0) {
fprintf (stderr, "Unable to initialize SDL: %s\n", SDL_GetError ());
return -1;
}
/* Create a 640x480 OpenGL screen */
if (SDL_SetVideoMode (640, 480, 0, SDL_OPENGL) == NULL) {
fprintf (stderr, "Unable to create OpenGL screen: %s\n", SDL_GetError ());
SDL_Quit ();
return -1;
}
/* Set the title bar in environments that support it */
SDL_WM_SetCaption ("SDL and gst-plugins-gl", NULL);
/* Loop, drawing and checking events */
InitGL (640, 480);
gst_init (&argc, &argv);
loop = g_main_loop_new (NULL, FALSE);
/* retrieve and turn off sdl opengl context */
#ifdef WIN32
sdl_gl_context = wglGetCurrentContext ();
sdl_dc = wglGetCurrentDC ();
wglMakeCurrent (0, 0);
platform = "wgl";
sdl_gl_display = gst_gl_display_new ();
#else
SDL_VERSION (&info.version);
SDL_GetWMInfo (&info);
/* FIXME: This display is different to the one that SDL uses to create the
* GL context inside SDL_SetVideoMode() above which fails on Intel hardware
*/
sdl_display = info.info.x11.gfxdisplay;
sdl_win = info.info.x11.window;
sdl_gl_context = glXGetCurrentContext ();
glXMakeCurrent (sdl_display, None, 0);
platform = "glx";
sdl_gl_display =
(GstGLDisplay *) gst_gl_display_x11_new_with_display (sdl_display);
#endif
sdl_context =
gst_gl_context_new_wrapped (sdl_gl_display, (guintptr) sdl_gl_context,
gst_gl_platform_from_string (platform), GST_GL_API_OPENGL);
pipeline =
GST_PIPELINE (gst_parse_launch
("videotestsrc ! video/x-raw, width=320, height=240, framerate=(fraction)30/1 ! "
"glimagesink name=glimagesink0", NULL));
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_signal_watch (bus);
g_signal_connect (bus, "message::error", G_CALLBACK (end_stream_cb), loop);
g_signal_connect (bus, "message::warning", G_CALLBACK (end_stream_cb), loop);
g_signal_connect (bus, "message::eos", G_CALLBACK (end_stream_cb), loop);
gst_bus_enable_sync_message_emission (bus);
g_signal_connect (bus, "sync-message", G_CALLBACK (sync_bus_call), NULL);
gst_object_unref (bus);
glimagesink = gst_bin_get_by_name (GST_BIN (pipeline), "glimagesink0");
g_signal_connect (G_OBJECT (glimagesink), "client-draw",
G_CALLBACK (on_client_draw), NULL);
gst_object_unref (glimagesink);
/* NULL to PAUSED state pipeline to make sure the gst opengl context is created and
* shared with the sdl one */
gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PAUSED);
/* turn on back sdl opengl context */
#ifdef WIN32
wglMakeCurrent (sdl_dc, sdl_gl_context);
#else
glXMakeCurrent (sdl_display, sdl_win, sdl_gl_context);
#endif
gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
g_timeout_add (100, update_sdl_scene, pipeline);
g_main_loop_run (loop);
/* before to deinitialize the gst-gl-opengl context,
* no shared context (here the sdl one) must be current
*/
#ifdef WIN32
wglMakeCurrent (0, 0);
#else
glXMakeCurrent (sdl_display, sdl_win, sdl_gl_context);
#endif
gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_NULL);
gst_object_unref (pipeline);
/* turn on back sdl opengl context */
#ifdef WIN32
wglMakeCurrent (sdl_dc, sdl_gl_context);
#else
glXMakeCurrent (sdl_display, None, 0);
#endif
SDL_Quit ();
return 0;
}
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);
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 (&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);
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 (!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;
}
}
int
main (int argc, char **argv)
{
#ifdef WIN32
HGLRC sdl_gl_context = 0;
HDC sdl_dc = 0;
#else
SDL_SysWMinfo info;
Display *sdl_display = NULL;
Window sdl_win = 0;
GLXContext sdl_gl_context = NULL;
#endif
GMainLoop *loop = NULL;
GstPipeline *pipeline = NULL;
GstBus *bus = NULL;
GstElement *fakesink = NULL;
GstState state;
GAsyncQueue *queue_input_buf = NULL;
GAsyncQueue *queue_output_buf = NULL;
const gchar *platform;
/* Initialize SDL for video output */
if (SDL_Init (SDL_INIT_VIDEO) < 0) {
fprintf (stderr, "Unable to initialize SDL: %s\n", SDL_GetError ());
return -1;
}
/* Create a 640x480 OpenGL screen */
if (SDL_SetVideoMode (640, 480, 0, SDL_OPENGL) == NULL) {
fprintf (stderr, "Unable to create OpenGL screen: %s\n", SDL_GetError ());
SDL_Quit ();
return -1;
}
/* Set the title bar in environments that support it */
SDL_WM_SetCaption ("SDL and gst-plugins-gl", NULL);
/* Loop, drawing and checking events */
InitGL (640, 480);
gst_init (&argc, &argv);
loop = g_main_loop_new (NULL, FALSE);
/* retrieve and turn off sdl opengl context */
#ifdef WIN32
sdl_gl_context = wglGetCurrentContext ();
sdl_dc = wglGetCurrentDC ();
wglMakeCurrent (0, 0);
platform = "wgl";
sdl_gl_display = gst_gl_display_new ();
#else
SDL_VERSION (&info.version);
SDL_GetWMInfo (&info);
/* FIXME: This display is different to the one that SDL uses to create the
* GL context inside SDL_SetVideoMode() above which fails on Intel hardware
*/
sdl_display = info.info.x11.gfxdisplay;
sdl_win = info.info.x11.window;
sdl_gl_context = glXGetCurrentContext ();
glXMakeCurrent (sdl_display, None, 0);
platform = "glx";
sdl_gl_display =
(GstGLDisplay *) gst_gl_display_x11_new_with_display (sdl_display);
#endif
sdl_context =
gst_gl_context_new_wrapped (sdl_gl_display, (guintptr) sdl_gl_context,
gst_gl_platform_from_string (platform), GST_GL_API_OPENGL);
pipeline =
GST_PIPELINE (gst_parse_launch
("videotestsrc ! video/x-raw, width=320, height=240, framerate=(fraction)30/1 ! "
"gleffects effect=5 ! fakesink sync=1", NULL));
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_signal_watch (bus);
g_signal_connect (bus, "message::error", G_CALLBACK (end_stream_cb), loop);
g_signal_connect (bus, "message::warning", G_CALLBACK (end_stream_cb), loop);
g_signal_connect (bus, "message::eos", G_CALLBACK (end_stream_cb), loop);
gst_bus_enable_sync_message_emission (bus);
g_signal_connect (bus, "sync-message", G_CALLBACK (sync_bus_call), NULL);
gst_object_unref (bus);
/* NULL to PAUSED state pipeline to make sure the gst opengl context is created and
* shared with the sdl one */
gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PAUSED);
state = GST_STATE_PAUSED;
if (gst_element_get_state (GST_ELEMENT (pipeline), &state, NULL,
GST_CLOCK_TIME_NONE) != GST_STATE_CHANGE_SUCCESS) {
g_debug ("failed to pause pipeline\n");
return -1;
}
/* turn on back sdl opengl context */
#ifdef WIN32
wglMakeCurrent (sdl_dc, sdl_gl_context);
#else
glXMakeCurrent (sdl_display, sdl_win, sdl_gl_context);
#endif
/* append a gst-gl texture to this queue when you do not need it no more */
fakesink = gst_bin_get_by_name (GST_BIN (pipeline), "fakesink0");
g_object_set (G_OBJECT (fakesink), "signal-handoffs", TRUE, NULL);
g_signal_connect (fakesink, "handoff", G_CALLBACK (on_gst_buffer), NULL);
queue_input_buf = g_async_queue_new ();
queue_output_buf = g_async_queue_new ();
g_object_set_data (G_OBJECT (fakesink), "queue_input_buf", queue_input_buf);
g_object_set_data (G_OBJECT (fakesink), "queue_output_buf", queue_output_buf);
g_object_set_data (G_OBJECT (fakesink), "loop", loop);
gst_object_unref (fakesink);
gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
g_main_loop_run (loop);
/* before to deinitialize the gst-gl-opengl context,
* no shared context (here the sdl one) must be current
*/
#ifdef WIN32
wglMakeCurrent (0, 0);
#else
glXMakeCurrent (sdl_display, sdl_win, sdl_gl_context);
#endif
gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_NULL);
gst_object_unref (pipeline);
/* turn on back sdl opengl context */
#ifdef WIN32
wglMakeCurrent (sdl_dc, sdl_gl_context);
#else
glXMakeCurrent (sdl_display, None, 0);
#endif
SDL_Quit ();
/* make sure there is no pending gst gl buffer in the communication queues
* between sdl and gst-gl
*/
while (g_async_queue_length (queue_input_buf) > 0) {
GstBuffer *buf = (GstBuffer *) g_async_queue_pop (queue_input_buf);
gst_buffer_unref (buf);
}
while (g_async_queue_length (queue_output_buf) > 0) {
GstBuffer *buf = (GstBuffer *) g_async_queue_pop (queue_output_buf);
gst_buffer_unref (buf);
}
return 0;
}
