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glvideomixer: perform _get_highest_precision on the GL thread

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gst_gl_shader_string_get_highest_precision needs to make an OpenGL call
so execution outside the OpenGL thread and context results in undefined
behaviour.
This commit is contained in:
Matthew Waters 2019-06-05 18:17:35 +10:00 committed by Sebastian Dröge
parent b596bf7cb7
commit f31b83bc86
1 changed files with 18 additions and 19 deletions
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37
ext/gl/gstglvideomixer.c
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@ -473,7 +473,7 @@ static GstCaps *_fixate_caps (GstAggregator * agg, GstCaps * caps);
static gboolean gst_gl_video_mixer_propose_allocation (GstAggregator *
agg, GstAggregatorPad * agg_pad, GstQuery * decide_query, GstQuery * query);
static void gst_gl_video_mixer_reset (GstGLMixer * mixer);
static gboolean gst_gl_video_mixer_init_shader (GstGLMixer * mixer,
static gboolean gst_gl_video_mixer_set_caps (GstGLMixer * mixer,
GstCaps * outcaps);
static gboolean gst_gl_video_mixer_process_textures (GstGLMixer * mixer,
@ -917,7 +917,7 @@ gst_gl_video_mixer_class_init (GstGLVideoMixerClass * klass)
GST_TYPE_GL_VIDEO_MIXER_BACKGROUND,
DEFAULT_BACKGROUND, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
GST_GL_MIXER_CLASS (klass)->set_caps = gst_gl_video_mixer_init_shader;
GST_GL_MIXER_CLASS (klass)->set_caps = gst_gl_video_mixer_set_caps;
GST_GL_MIXER_CLASS (klass)->reset = gst_gl_video_mixer_reset;
GST_GL_MIXER_CLASS (klass)->process_textures =
gst_gl_video_mixer_process_textures;
@ -1202,30 +1202,16 @@ gst_gl_video_mixer_reset (GstGLMixer * mixer)
}
static gboolean
gst_gl_video_mixer_init_shader (GstGLMixer * mixer, GstCaps * outcaps)
gst_gl_video_mixer_set_caps (GstGLMixer * mixer, GstCaps * outcaps)
{
GstGLVideoMixer *video_mixer = GST_GL_VIDEO_MIXER (mixer);
gchar *frag_str;
gboolean ret;
if (video_mixer->shader)
gst_object_unref (video_mixer->shader);
g_clear_object (&video_mixer->shader);
/* need reconfigure output geometry */
video_mixer->output_geo_change = TRUE;
frag_str =
g_strdup_printf ("%s%s",
gst_gl_shader_string_get_highest_precision (GST_GL_BASE_MIXER
(mixer)->context, GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY),
video_mixer_f_src);
ret = gst_gl_context_gen_shader (GST_GL_BASE_MIXER (mixer)->context,
gst_gl_shader_string_vertex_mat4_vertex_transform,
frag_str, &video_mixer->shader);
g_free (frag_str);
return ret;
return TRUE;
}
static void
@ -1233,6 +1219,19 @@ _video_mixer_process_gl (GstGLContext * context, GstGLVideoMixer * video_mixer)
{
GstGLMixer *mixer = GST_GL_MIXER (video_mixer);
if (!video_mixer->shader) {
gchar *frag_str = g_strdup_printf ("%s%s",
gst_gl_shader_string_get_highest_precision (GST_GL_BASE_MIXER
(mixer)->context, GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY),
video_mixer_f_src);
gst_gl_context_gen_shader (GST_GL_BASE_MIXER (mixer)->context,
gst_gl_shader_string_vertex_mat4_vertex_transform,
frag_str, &video_mixer->shader);
g_free (frag_str);
}
gst_gl_framebuffer_draw_to_texture (mixer->fbo, video_mixer->out_tex,
gst_gl_video_mixer_callback, video_mixer);
}