mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-10 03:19:40 +00:00
299 lines
7.4 KiB
C
299 lines
7.4 KiB
C
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gstglbuffer.h>
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#include <gstgldisplay.h>
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#include <GL/glext.h>
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#include <unistd.h>
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#include "glextensions.h"
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#include <string.h>
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static GObjectClass *gst_gl_buffer_parent_class;
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static void
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gst_gl_buffer_finalize (GstGLBuffer * buffer)
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{
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gst_gl_display_lock (buffer->display);
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switch (buffer->type) {
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case GST_GL_BUFFER_XIMAGE:
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GST_DEBUG ("freeing pixmap %ld", buffer->pixmap);
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XFreeGC (buffer->display->display, buffer->gc);
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XFreePixmap (buffer->display->display, buffer->pixmap);
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break;
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case GST_GL_BUFFER_RBO:
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glDeleteRenderbuffersEXT (1, &buffer->rbo);
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break;
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case GST_GL_BUFFER_TEXTURE:
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glDeleteTextures (1, &buffer->texture);
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break;
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default:
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g_assert_not_reached ();
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break;
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}
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gst_gl_display_unlock (buffer->display);
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g_object_unref (buffer->display);
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GST_MINI_OBJECT_CLASS (gst_gl_buffer_parent_class)->
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finalize (GST_MINI_OBJECT (buffer));
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}
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static void
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gst_gl_buffer_init (GstGLBuffer * buffer, gpointer g_class)
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{
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}
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static void
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gst_gl_buffer_class_init (gpointer g_class, gpointer class_data)
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{
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GstMiniObjectClass *mini_object_class = GST_MINI_OBJECT_CLASS (g_class);
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gst_gl_buffer_parent_class = g_type_class_peek_parent (g_class);
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mini_object_class->finalize = (GstMiniObjectFinalizeFunction)
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gst_gl_buffer_finalize;
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}
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GType
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gst_gl_buffer_get_type (void)
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{
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static GType _gst_gl_buffer_type;
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if (G_UNLIKELY (_gst_gl_buffer_type == 0)) {
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static const GTypeInfo info = {
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sizeof (GstBufferClass),
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NULL,
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NULL,
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gst_gl_buffer_class_init,
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NULL,
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NULL,
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sizeof (GstGLBuffer),
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0,
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(GInstanceInitFunc) gst_gl_buffer_init,
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NULL
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};
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_gst_gl_buffer_type = g_type_register_static (GST_TYPE_BUFFER,
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"GstGLBuffer", &info, 0);
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}
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return _gst_gl_buffer_type;
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}
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GstGLBuffer *
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gst_gl_buffer_new (GstGLDisplay * display, GstVideoFormat format,
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int width, int height)
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{
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GstGLBuffer *buffer;
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XGCValues values = { 0 };
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g_return_val_if_fail (format == GST_VIDEO_FORMAT_RGBx, NULL);
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g_return_val_if_fail (width > 0, NULL);
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g_return_val_if_fail (height > 0, NULL);
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buffer = (GstGLBuffer *) gst_mini_object_new (GST_TYPE_GL_BUFFER);
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buffer->display = g_object_ref (display);
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buffer->type = GST_GL_BUFFER_TEXTURE;
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buffer->width = width;
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buffer->height = height;
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switch (buffer->type) {
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case GST_GL_BUFFER_XIMAGE:
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{
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buffer->pixmap = XCreatePixmap (display->display,
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DefaultRootWindow (display->display), width, height, 32);
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XSync (display->display, False);
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buffer->gc = XCreateGC (display->display, buffer->pixmap, 0, &values);
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GST_DEBUG ("new pixmap %dx%d xid %ld", width, height, buffer->pixmap);
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break;
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}
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case GST_GL_BUFFER_RBO:
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{
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GLuint fbo;
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gst_gl_display_lock (buffer->display);
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glGenFramebuffersEXT (1, &fbo);
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glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, fbo);
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glGenRenderbuffersEXT (1, &buffer->rbo);
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glBindRenderbufferEXT (GL_RENDERBUFFER_EXT, buffer->rbo);
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glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT,
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GL_COLOR_ATTACHMENT1_EXT, GL_RENDERBUFFER_EXT, buffer->rbo);
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glRenderbufferStorageEXT (GL_RENDERBUFFER_EXT, GL_RGB,
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buffer->width, buffer->height);
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glDrawBuffer (GL_COLOR_ATTACHMENT1_EXT);
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glReadBuffer (GL_COLOR_ATTACHMENT1_EXT);
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g_assert (glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT) ==
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GL_FRAMEBUFFER_COMPLETE_EXT);
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glDeleteFramebuffersEXT (1, &fbo);
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gst_gl_display_unlock (buffer->display);
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break;
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}
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case GST_GL_BUFFER_TEXTURE:
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break;
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default:
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g_assert_not_reached ();
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}
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return buffer;
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}
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void
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gst_gl_buffer_upload (GstGLBuffer * buffer, void *data)
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{
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Display *display = buffer->display->display;
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GST_DEBUG ("uploading %p %dx%d", data, buffer->width, buffer->height);
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gst_gl_display_lock (buffer->display);
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switch (buffer->type) {
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case GST_GL_BUFFER_XIMAGE:
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{
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XImage *image;
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Visual *visual;
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int depth;
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int bpp;
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visual = DefaultVisual (display, 0);
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depth = 32;
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bpp = 32;
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image = XCreateImage (display, visual, depth, ZPixmap, 0, NULL,
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buffer->width, buffer->height, bpp, 0);
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GST_DEBUG ("image %p", image);
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image->data = data;
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XPutImage (display, buffer->pixmap, buffer->gc,
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image, 0, 0, 0, 0, buffer->width, buffer->height);
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XDestroyImage (image);
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break;
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}
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case GST_GL_BUFFER_RBO:
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{
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unsigned int fbo;
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g_assert (glIsRenderbufferEXT (buffer->rbo));
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glGenFramebuffersEXT (1, &fbo);
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glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, fbo);
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glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT,
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GL_COLOR_ATTACHMENT1_EXT, GL_RENDERBUFFER_EXT, buffer->rbo);
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glDrawBuffer (GL_COLOR_ATTACHMENT1_EXT);
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glReadBuffer (GL_COLOR_ATTACHMENT1_EXT);
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g_assert (glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT) ==
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GL_FRAMEBUFFER_COMPLETE_EXT);
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gst_gl_display_check_error (buffer->display, __LINE__);
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glWindowPos2iARB (0, 0);
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glDrawPixels (buffer->width, buffer->height, GL_RGB,
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GL_UNSIGNED_BYTE, data);
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glDeleteFramebuffersEXT (1, &fbo);
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g_assert (glIsRenderbufferEXT (buffer->rbo));
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break;
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}
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case GST_GL_BUFFER_TEXTURE:
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buffer->texture =
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gst_gl_display_upload_texture_rectangle (buffer->display,
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GST_VIDEO_FORMAT_RGBx, data, buffer->width, buffer->height);
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break;
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default:
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g_assert_not_reached ();
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}
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gst_gl_display_unlock (buffer->display);
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}
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void
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gst_gl_buffer_download (GstGLBuffer * buffer, void *data)
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{
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gst_gl_display_lock (buffer->display);
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GST_DEBUG ("downloading");
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switch (buffer->type) {
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case GST_GL_BUFFER_XIMAGE:
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{
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XImage *image;
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image = XGetImage (buffer->display->display, buffer->pixmap,
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0, 0, buffer->width, buffer->height, 0xffffffff, ZPixmap);
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memcpy (data, image->data, buffer->width * buffer->height * 4);
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XDestroyImage (image);
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break;
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}
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case GST_GL_BUFFER_RBO:
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{
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unsigned int fbo;
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glGenFramebuffersEXT (1, &fbo);
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glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, fbo);
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glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT,
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GL_COLOR_ATTACHMENT1_EXT, GL_RENDERBUFFER_EXT, buffer->rbo);
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glDrawBuffer (GL_COLOR_ATTACHMENT1_EXT);
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glReadBuffer (GL_COLOR_ATTACHMENT1_EXT);
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g_assert (glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT) ==
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GL_FRAMEBUFFER_COMPLETE_EXT);
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glReadPixels (0, 0, buffer->width, buffer->height / 2, GL_RGBA,
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GL_UNSIGNED_BYTE, data);
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glDeleteFramebuffersEXT (1, &fbo);
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break;
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}
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case GST_GL_BUFFER_TEXTURE:
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{
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unsigned int fbo;
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glGenFramebuffersEXT (1, &fbo);
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glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, fbo);
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glFramebufferTexture2DEXT (GL_FRAMEBUFFER_EXT,
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GL_COLOR_ATTACHMENT1_EXT, GL_TEXTURE_RECTANGLE_ARB,
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buffer->texture, 0);
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glDrawBuffer (GL_COLOR_ATTACHMENT1_EXT);
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glReadBuffer (GL_COLOR_ATTACHMENT1_EXT);
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g_assert (glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT) ==
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GL_FRAMEBUFFER_COMPLETE_EXT);
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glReadPixels (0, 0, buffer->width, buffer->height, GL_RGBA,
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GL_UNSIGNED_BYTE, data);
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glDeleteFramebuffersEXT (1, &fbo);
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}
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break;
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default:
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g_assert_not_reached ();
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}
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gst_gl_display_unlock (buffer->display);
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}
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