static void
_mixer_pad_get_output_size (GstGLVideoMixer * mix,
GstGLVideoMixerPad * mix_pad, gint * width, gint * height)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (mix);
GstVideoAggregatorPad *vagg_pad = GST_VIDEO_AGGREGATOR_PAD (mix_pad);
gint pad_width, pad_height;
guint dar_n, dar_d;
/* FIXME: Anything better we can do here? */
if (!vagg_pad->info.finfo
|| vagg_pad->info.finfo->format == GST_VIDEO_FORMAT_UNKNOWN) {
GST_DEBUG_OBJECT (mix_pad, "Have no caps yet");
*width = 0;
*height = 0;
return;
}
pad_width =
mix_pad->width <=
0 ? GST_VIDEO_INFO_WIDTH (&vagg_pad->info) : mix_pad->width;
pad_height =
mix_pad->height <=
0 ? GST_VIDEO_INFO_HEIGHT (&vagg_pad->info) : mix_pad->height;
gst_video_calculate_display_ratio (&dar_n, &dar_d, pad_width, pad_height,
GST_VIDEO_INFO_PAR_N (&vagg_pad->info),
GST_VIDEO_INFO_PAR_D (&vagg_pad->info),
GST_VIDEO_INFO_PAR_N (&vagg->info), GST_VIDEO_INFO_PAR_D (&vagg->info)
);
GST_LOG_OBJECT (mix_pad, "scaling %ux%u by %u/%u (%u/%u / %u/%u)", pad_width,
pad_height, dar_n, dar_d, GST_VIDEO_INFO_PAR_N (&vagg_pad->info),
GST_VIDEO_INFO_PAR_D (&vagg_pad->info),
GST_VIDEO_INFO_PAR_N (&vagg->info), GST_VIDEO_INFO_PAR_D (&vagg->info));
if (pad_height % dar_n == 0) {
pad_width = gst_util_uint64_scale_int (pad_height, dar_n, dar_d);
} else if (pad_width % dar_d == 0) {
pad_height = gst_util_uint64_scale_int (pad_width, dar_d, dar_n);
} else {
pad_width = gst_util_uint64_scale_int (pad_height, dar_n, dar_d);
}
if (width)
*width = pad_width;
if (height)
*height = pad_height;
}
static void
_mixer_pad_get_output_size (GstCompositor * comp,
GstCompositorPad * comp_pad, gint out_par_n, gint out_par_d, gint * width,
gint * height)
{
GstVideoAggregatorPad *vagg_pad = GST_VIDEO_AGGREGATOR_PAD (comp_pad);
gint pad_width, pad_height;
guint dar_n, dar_d;
/* FIXME: Anything better we can do here? */
if (!vagg_pad->info.finfo
|| vagg_pad->info.finfo->format == GST_VIDEO_FORMAT_UNKNOWN) {
GST_DEBUG_OBJECT (comp_pad, "Have no caps yet");
*width = 0;
*height = 0;
return;
}
pad_width =
comp_pad->width <=
0 ? GST_VIDEO_INFO_WIDTH (&vagg_pad->info) : comp_pad->width;
pad_height =
comp_pad->height <=
0 ? GST_VIDEO_INFO_HEIGHT (&vagg_pad->info) : comp_pad->height;
if (!gst_video_calculate_display_ratio (&dar_n, &dar_d, pad_width, pad_height,
GST_VIDEO_INFO_PAR_N (&vagg_pad->info),
GST_VIDEO_INFO_PAR_D (&vagg_pad->info), out_par_n, out_par_d)) {
GST_WARNING_OBJECT (comp_pad, "Cannot calculate display aspect ratio");
*width = *height = 0;
}
GST_LOG_OBJECT (comp_pad, "scaling %ux%u by %u/%u (%u/%u / %u/%u)", pad_width,
pad_height, dar_n, dar_d, GST_VIDEO_INFO_PAR_N (&vagg_pad->info),
GST_VIDEO_INFO_PAR_D (&vagg_pad->info), out_par_n, out_par_d);
if (pad_height % dar_n == 0) {
pad_width = gst_util_uint64_scale_int (pad_height, dar_n, dar_d);
} else if (pad_width % dar_d == 0) {
pad_height = gst_util_uint64_scale_int (pad_width, dar_d, dar_n);
} else {
pad_width = gst_util_uint64_scale_int (pad_height, dar_n, dar_d);
}
*width = pad_width;
*height = pad_height;
}
/* opengl scene, params: input texture (not the output mixer->texture) */
static void
gst_gl_video_mixer_callback (gpointer stuff)
{
GstGLVideoMixer *video_mixer = GST_GL_VIDEO_MIXER (stuff);
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (stuff);
GstGLMixer *mixer = GST_GL_MIXER (video_mixer);
GstGLFuncs *gl = GST_GL_BASE_MIXER (mixer)->context->gl_vtable;
GLint attr_position_loc = 0;
GLint attr_texture_loc = 0;
guint out_width, out_height;
guint count = 0;
out_width = GST_VIDEO_INFO_WIDTH (&vagg->info);
out_height = GST_VIDEO_INFO_HEIGHT (&vagg->info);
gst_gl_context_clear_shader (GST_GL_BASE_MIXER (mixer)->context);
gl->BindTexture (GL_TEXTURE_2D, 0);
gl->Disable (GL_DEPTH_TEST);
gl->Disable (GL_CULL_FACE);
if (gl->GenVertexArrays) {
if (!video_mixer->vao)
gl->GenVertexArrays (1, &video_mixer->vao);
gl->BindVertexArray (video_mixer->vao);
}
if (!_draw_background (video_mixer))
return;
gst_gl_shader_use (video_mixer->shader);
attr_position_loc =
gst_gl_shader_get_attribute_location (video_mixer->shader, "a_position");
attr_texture_loc =
gst_gl_shader_get_attribute_location (video_mixer->shader, "a_texCoord");
gl->Enable (GL_BLEND);
while (count < video_mixer->input_frames->len) {
GstGLMixerFrameData *frame;
GstGLVideoMixerPad *pad;
GstVideoInfo *v_info;
guint in_tex;
guint in_width, in_height;
/* *INDENT-OFF* */
gfloat v_vertices[] = {
-1.0,-1.0,-1.0f, 0.0f, 0.0f,
1.0,-1.0,-1.0f, 1.0f, 0.0f,
1.0, 1.0,-1.0f, 1.0f, 1.0f,
-1.0, 1.0,-1.0f, 0.0f, 1.0f,
};
/* *INDENT-ON* */
frame = g_ptr_array_index (video_mixer->input_frames, count);
if (!frame) {
GST_DEBUG ("skipping texture, null frame");
count++;
continue;
}
pad = (GstGLVideoMixerPad *) frame->pad;
v_info = &GST_VIDEO_AGGREGATOR_PAD (pad)->info;
in_width = GST_VIDEO_INFO_WIDTH (v_info);
in_height = GST_VIDEO_INFO_HEIGHT (v_info);
if (!frame->texture || in_width <= 0 || in_height <= 0
|| pad->alpha == 0.0f) {
GST_DEBUG ("skipping texture:%u frame:%p width:%u height:%u alpha:%f",
frame->texture, frame, in_width, in_height, pad->alpha);
count++;
continue;
}
in_tex = frame->texture;
_init_vbo_indices (video_mixer);
if (pad->geometry_change || !pad->vertex_buffer) {
gint pad_width, pad_height;
gfloat w, h;
_mixer_pad_get_output_size (video_mixer, pad, &pad_width, &pad_height);
w = ((gfloat) pad_width / (gfloat) out_width);
h = ((gfloat) pad_height / (gfloat) out_height);
/* top-left */
v_vertices[0] = v_vertices[15] =
2.0f * (gfloat) pad->xpos / (gfloat) out_width - 1.0f;
/* bottom-left */
v_vertices[1] = v_vertices[6] =
2.0f * (gfloat) pad->ypos / (gfloat) out_height - 1.0f;
/* top-right */
v_vertices[5] = v_vertices[10] = v_vertices[0] + 2.0f * w;
/* bottom-right */
v_vertices[11] = v_vertices[16] = v_vertices[1] + 2.0f * h;
GST_TRACE ("processing texture:%u dimensions:%ux%u, at %f,%f %fx%f with "
"alpha:%f", in_tex, in_width, in_height, v_vertices[0], v_vertices[1],
v_vertices[5], v_vertices[11], pad->alpha);
if (!pad->vertex_buffer)
gl->GenBuffers (1, &pad->vertex_buffer);
gl->BindBuffer (GL_ARRAY_BUFFER, pad->vertex_buffer);
gl->BufferData (GL_ARRAY_BUFFER, 4 * 5 * sizeof (GLfloat), v_vertices,
GL_STATIC_DRAW);
pad->geometry_change = FALSE;
} else {
gl->BindBuffer (GL_ARRAY_BUFFER, pad->vertex_buffer);
}
gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, video_mixer->vbo_indices);
gl->BlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
gl->BlendEquation (GL_FUNC_ADD);
gl->ActiveTexture (GL_TEXTURE0);
gl->BindTexture (GL_TEXTURE_2D, in_tex);
gst_gl_shader_set_uniform_1i (video_mixer->shader, "texture", 0);
gst_gl_shader_set_uniform_1f (video_mixer->shader, "alpha", pad->alpha);
gl->EnableVertexAttribArray (attr_position_loc);
gl->EnableVertexAttribArray (attr_texture_loc);
gl->VertexAttribPointer (attr_position_loc, 3, GL_FLOAT,
GL_FALSE, 5 * sizeof (GLfloat), (void *) 0);
gl->VertexAttribPointer (attr_texture_loc, 2, GL_FLOAT,
GL_FALSE, 5 * sizeof (GLfloat), (void *) (3 * sizeof (GLfloat)));
gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0);
++count;
}
gl->DisableVertexAttribArray (attr_position_loc);
gl->DisableVertexAttribArray (attr_texture_loc);
if (gl->GenVertexArrays)
gl->BindVertexArray (0);
gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, 0);
gl->BindBuffer (GL_ARRAY_BUFFER, 0);
gl->BindTexture (GL_TEXTURE_2D, 0);
gl->Disable (GL_BLEND);
gst_gl_context_clear_shader (GST_GL_BASE_MIXER (mixer)->context);
}
/* opengl scene, params: input texture (not the output mixer->texture) */
static gboolean
gst_gl_mosaic_callback (gpointer stuff)
{
GstGLMosaic *mosaic = GST_GL_MOSAIC (stuff);
GstGLMixer *mixer = GST_GL_MIXER (mosaic);
GstGLFuncs *gl = GST_GL_BASE_MIXER (mixer)->context->gl_vtable;
GList *walk;
static GLfloat xrot = 0;
static GLfloat yrot = 0;
static GLfloat zrot = 0;
GLint attr_position_loc = 0;
GLint attr_texture_loc = 0;
const GLfloat matrix[] = {
0.5f, 0.0f, 0.0f, 0.0f,
0.0f, 0.5f, 0.0f, 0.0f,
0.0f, 0.0f, 0.5f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f
};
const GLushort indices[] = {
0, 1, 2,
0, 2, 3
};
guint count = 0;
gst_gl_context_clear_shader (GST_GL_BASE_MIXER (mixer)->context);
gl->BindTexture (GL_TEXTURE_2D, 0);
gl->Enable (GL_DEPTH_TEST);
gl->ClearColor (0.0, 0.0, 0.0, 0.0);
gl->Clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
gst_gl_shader_use (mosaic->shader);
attr_position_loc =
gst_gl_shader_get_attribute_location (mosaic->shader, "a_position");
attr_texture_loc =
gst_gl_shader_get_attribute_location (mosaic->shader, "a_texCoord");
GST_OBJECT_LOCK (mosaic);
walk = GST_ELEMENT (mosaic)->sinkpads;
while (walk) {
GstGLMixerPad *pad = walk->data;
/* *INDENT-OFF* */
gfloat v_vertices[] = {
/* front face */
1.0f, 1.0f,-1.0f, 1.0f, 0.0f,
1.0f,-1.0f,-1.0f, 1.0f, 1.0f,
-1.0f,-1.0f,-1.0f, 0.0f, 1.0f,
-1.0f, 1.0f,-1.0f, 0.0f, 0.0f,
/* right face */
1.0f, 1.0f, 1.0f, 1.0f, 0.0f,
1.0f,-1.0f, 1.0f, 0.0f, 0.0f,
1.0f,-1.0f,-1.0f, 0.0f, 1.0f,
1.0f, 1.0f,-1.0f, 1.0f, 1.0f,
/* left face */
-1.0f, 1.0f, 1.0f, 1.0f, 0.0f,
-1.0f, 1.0f,-1.0f, 1.0f, 1.0f,
-1.0f,-1.0f,-1.0f, 0.0f, 1.0f,
-1.0f,-1.0f, 1.0f, 0.0f, 0.0f,
/* top face */
1.0f,-1.0f, 1.0f, 1.0f, 0.0f,
-1.0f,-1.0f, 1.0f, 0.0f, 0.0f,
-1.0f,-1.0f,-1.0f, 0.0f, 1.0f,
1.0f,-1.0f,-1.0f, 1.0f, 1.0f,
/* bottom face */
1.0f, 1.0f, 1.0f, 1.0f, 0.0f,
1.0f, 1.0f,-1.0f, 1.0f, 1.0f,
-1.0f, 1.0f,-1.0f, 0.0f, 1.0f,
-1.0f, 1.0f, 1.0f, 0.0f, 0.0f,
/* back face */
1.0f, 1.0f, 1.0f, 1.0f, 0.0f,
-1.0f, 1.0f, 1.0f, 0.0f, 0.0f,
-1.0f,-1.0f, 1.0f, 0.0f, 1.0f,
1.0f,-1.0f, 1.0f, 1.0f, 1.0f
};
/* *INDENT-ON* */
guint in_tex;
guint width, height;
in_tex = pad->current_texture;
width = GST_VIDEO_INFO_WIDTH (&GST_VIDEO_AGGREGATOR_PAD (pad)->info);
height = GST_VIDEO_INFO_HEIGHT (&GST_VIDEO_AGGREGATOR_PAD (pad)->info);
if (!in_tex || width <= 0 || height <= 0) {
GST_DEBUG ("skipping texture:%u pad:%p width:%u height %u",
in_tex, pad, width, height);
count++;
walk = g_list_next (walk);
continue;
}
GST_TRACE ("processing texture:%u dimensions:%ux%u", in_tex, width, height);
gl->VertexAttribPointer (attr_position_loc, 3, GL_FLOAT,
GL_FALSE, 5 * sizeof (GLfloat), &v_vertices[5 * 4 * count]);
gl->VertexAttribPointer (attr_texture_loc, 2, GL_FLOAT,
GL_FALSE, 5 * sizeof (GLfloat), &v_vertices[5 * 4 * count + 3]);
gl->EnableVertexAttribArray (attr_position_loc);
gl->EnableVertexAttribArray (attr_texture_loc);
gl->ActiveTexture (GL_TEXTURE0);
gl->BindTexture (GL_TEXTURE_2D, in_tex);
gst_gl_shader_set_uniform_1i (mosaic->shader, "s_texture", 0);
gst_gl_shader_set_uniform_1f (mosaic->shader, "xrot_degree", xrot);
gst_gl_shader_set_uniform_1f (mosaic->shader, "yrot_degree", yrot);
gst_gl_shader_set_uniform_1f (mosaic->shader, "zrot_degree", zrot);
gst_gl_shader_set_uniform_matrix_4fv (mosaic->shader, "u_matrix", 1,
GL_FALSE, matrix);
gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
++count;
walk = g_list_next (walk);
}
GST_OBJECT_UNLOCK (mosaic);
gl->DisableVertexAttribArray (attr_position_loc);
gl->DisableVertexAttribArray (attr_texture_loc);
gl->BindTexture (GL_TEXTURE_2D, 0);
gl->Disable (GL_DEPTH_TEST);
gst_gl_context_clear_shader (GST_GL_BASE_MIXER (mixer)->context);
xrot += 0.6f;
yrot += 0.4f;
zrot += 0.8f;
return TRUE;
}
static GstBuffer *
_default_pad_upload_buffer (GstGLMixer * mix, GstGLMixerFrameData * frame,
GstBuffer * buffer)
{
GstVideoAggregatorPad *vaggpad = GST_VIDEO_AGGREGATOR_PAD (frame->pad);
GstGLMixerPad *pad = frame->pad;
GstBuffer *uploaded_buf, *gl_buffer;
GstCaps *gl_caps;
GstCapsFeatures *gl_features;
GstVideoInfo gl_info;
GstVideoFrame gl_frame;
GstGLSyncMeta *sync_meta;
gst_video_info_set_format (&gl_info,
GST_VIDEO_FORMAT_RGBA,
GST_VIDEO_INFO_WIDTH (&vaggpad->info),
GST_VIDEO_INFO_HEIGHT (&vaggpad->info));
gl_features =
gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
gl_caps = gst_video_info_to_caps (&gl_info);
gst_caps_set_features (gl_caps, 0, gst_caps_features_copy (gl_features));
if (!pad->upload) {
GstCaps *in_caps = gst_pad_get_current_caps (GST_PAD (pad));
GstCaps *upload_caps = gst_caps_copy (in_caps);
pad->upload = gst_gl_upload_new (mix->context);
gst_caps_set_features (upload_caps, 0,
gst_caps_features_copy (gl_features));
gst_gl_upload_set_caps (pad->upload, in_caps, upload_caps);
if (!pad->convert) {
pad->convert = gst_gl_color_convert_new (mix->context);
gst_gl_color_convert_set_caps (pad->convert, upload_caps, gl_caps);
}
gst_caps_unref (upload_caps);
gst_caps_unref (in_caps);
}
gst_caps_features_free (gl_features);
gst_caps_unref (gl_caps);
sync_meta = gst_buffer_get_gl_sync_meta (vaggpad->buffer);
if (sync_meta)
gst_gl_sync_meta_wait (sync_meta);
if (gst_gl_upload_perform_with_buffer (pad->upload,
vaggpad->buffer, &uploaded_buf) != GST_GL_UPLOAD_DONE) {
return NULL;
}
if (!(gl_buffer = gst_gl_color_convert_perform (pad->convert, uploaded_buf))) {
gst_buffer_unref (uploaded_buf);
return NULL;
}
if (!gst_video_frame_map (&gl_frame, &gl_info, gl_buffer,
GST_MAP_READ | GST_MAP_GL)) {
gst_buffer_unref (uploaded_buf);
gst_buffer_unref (gl_buffer);
return NULL;
}
frame->texture = *(guint *) gl_frame.data[0];
gst_buffer_unref (uploaded_buf);
gst_video_frame_unmap (&gl_frame);
return gl_buffer;
}
