static GstFlowReturn
gst_glimage_sink_render (GstBaseSink * bsink, GstBuffer * buf)
{
GstGLImageSink *glimage_sink = NULL;
GstGLBuffer *gl_buffer = NULL;
glimage_sink = GST_GLIMAGE_SINK (bsink);
GST_INFO ("buffer size: %d", GST_BUFFER_SIZE (buf));
//is gl
if (glimage_sink->is_gl) {
//increment gl buffer ref before storage
gl_buffer = GST_GL_BUFFER (gst_buffer_ref (buf));
}
//is not gl
else {
//blocking call
gl_buffer = gst_gl_buffer_new (glimage_sink->display,
glimage_sink->width, glimage_sink->height);
//blocking call
gst_gl_display_do_upload (glimage_sink->display, gl_buffer->texture,
glimage_sink->width, glimage_sink->height, GST_BUFFER_DATA (buf));
//gl_buffer is created in this block, so the gl buffer is already referenced
}
if (glimage_sink->window_id != glimage_sink->new_window_id) {
glimage_sink->window_id = glimage_sink->new_window_id;
gst_gl_display_set_window_id (glimage_sink->display,
glimage_sink->window_id);
}
//the buffer is cleared when an other comes in
if (glimage_sink->stored_buffer) {
gst_buffer_unref (GST_BUFFER_CAST (glimage_sink->stored_buffer));
glimage_sink->stored_buffer = NULL;
}
//store current buffer
glimage_sink->stored_buffer = gl_buffer;
//redisplay opengl scene
if (gl_buffer->texture &&
gst_gl_display_redisplay (glimage_sink->display,
gl_buffer->texture, gl_buffer->width, gl_buffer->height,
glimage_sink->window_width, glimage_sink->window_height,
glimage_sink->keep_aspect_ratio))
return GST_FLOW_OK;
else {
GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND,
GST_GL_DISPLAY_ERR_MSG (glimage_sink->display), (NULL));
return GST_FLOW_ERROR;
}
}
/* allocate and output buffer, if no format was negotiated, this
* function will negotiate one. After calling this function, a
* reverse negotiation could have happened. */
static GstFlowReturn
get_buffer (GstVisualGL * visual, GstGLBuffer ** outbuf)
{
/* we don't know an output format yet, pick one */
if (GST_PAD_CAPS (visual->srcpad) == NULL) {
if (!gst_vis_gl_src_negotiate (visual))
return GST_FLOW_NOT_NEGOTIATED;
}
GST_DEBUG_OBJECT (visual, "allocating output buffer with caps %"
GST_PTR_FORMAT, GST_PAD_CAPS (visual->srcpad));
*outbuf = gst_gl_buffer_new (visual->display, visual->width, visual->height);
if (*outbuf == NULL)
return GST_FLOW_ERROR;
gst_buffer_set_caps (GST_BUFFER (*outbuf), GST_PAD_CAPS (visual->srcpad));
return GST_FLOW_OK;
}
static GstFlowReturn
gst_gl_filter_prepare_output_buffer (GstBaseTransform * trans,
GstBuffer * inbuf, gint size, GstCaps * caps, GstBuffer ** buf)
{
GstGLFilter *filter = NULL;
GstGLBuffer *gl_inbuf = GST_GL_BUFFER (inbuf);
GstGLBuffer *gl_outbuf = NULL;
filter = GST_GL_FILTER (trans);
if (filter->display == NULL) {
GstGLFilterClass *filter_class = GST_GL_FILTER_GET_CLASS (filter);
filter->display = g_object_ref (gl_inbuf->display);
//blocking call, generate a FBO
gst_gl_display_gen_fbo (filter->display, filter->width, filter->height,
&filter->fbo, &filter->depthbuffer);
if (filter_class->display_init_cb != NULL) {
gst_gl_display_thread_add (filter->display, gst_gl_filter_start_gl,
filter);
}
if (filter_class->onInitFBO)
filter_class->onInitFBO (filter);
}
gl_outbuf = gst_gl_buffer_new (filter->display,
filter->width, filter->height);
*buf = GST_BUFFER (gl_outbuf);
gst_buffer_set_caps (*buf, caps);
if (gl_outbuf->texture)
return GST_FLOW_OK;
else
return GST_FLOW_UNEXPECTED;
}
static GstFlowReturn
gst_glimage_sink_render (GstBaseSink * bsink, GstBuffer * buf)
{
GstGLImageSink *glimage_sink = NULL;
GstGLBuffer *gl_buffer = NULL;
glimage_sink = GST_GLIMAGE_SINK (bsink);
GST_INFO ("buffer size: %d", GST_BUFFER_SIZE (buf));
//is gl
if (glimage_sink->is_gl) {
//increment gl buffer ref before storage
gl_buffer = GST_GL_BUFFER (gst_buffer_ref (buf));
//if glimagesink has not the display yet
if (glimage_sink->display == NULL) {
glimage_sink->display = g_object_ref (gl_buffer->display);
gst_gl_display_set_client_reshape_callback (glimage_sink->display,
glimage_sink->clientReshapeCallback);
gst_gl_display_set_client_draw_callback (glimage_sink->display,
glimage_sink->clientDrawCallback);
}
}
//is not gl
else {
//if glimagesink has not the display yet
if (glimage_sink->display == NULL) {
//create a display
glimage_sink->display = gst_gl_display_new ();
//init opengl context
gst_gl_display_create_context (glimage_sink->display,
glimage_sink->width, glimage_sink->height, 0);
//init colorspace conversion if needed
gst_gl_display_init_upload (glimage_sink->display, glimage_sink->format,
glimage_sink->width, glimage_sink->height,
glimage_sink->width, glimage_sink->height);
gst_gl_display_set_client_reshape_callback (glimage_sink->display,
glimage_sink->clientReshapeCallback);
gst_gl_display_set_client_draw_callback (glimage_sink->display,
glimage_sink->clientDrawCallback);
}
//blocking call
gl_buffer = gst_gl_buffer_new (glimage_sink->display,
glimage_sink->width, glimage_sink->height);
//blocking call
gst_gl_display_do_upload (glimage_sink->display, gl_buffer->texture,
glimage_sink->width, glimage_sink->height, GST_BUFFER_DATA (buf));
//gl_buffer is created in this block, so the gl buffer is already referenced
}
if (glimage_sink->window_id != glimage_sink->new_window_id) {
glimage_sink->window_id = glimage_sink->new_window_id;
gst_gl_display_set_window_id (glimage_sink->display,
glimage_sink->window_id);
}
//the buffer is cleared when an other comes in
if (glimage_sink->stored_buffer) {
gst_buffer_unref (GST_BUFFER_CAST (glimage_sink->stored_buffer));
glimage_sink->stored_buffer = NULL;
}
//store current buffer
glimage_sink->stored_buffer = gl_buffer;
//redisplay opengl scene
if (gl_buffer->texture &&
gst_gl_display_redisplay (glimage_sink->display,
gl_buffer->texture, gl_buffer->width, gl_buffer->height,
glimage_sink->keep_aspect_ratio))
return GST_FLOW_OK;
else
return GST_FLOW_UNEXPECTED;
}
