+namespace {
+
+int Scene_new(lua_State* L)
+{
+ assert(lua_gettop(L) == 2);
+ Theme *theme = get_theme_updata(L);
+ int aspect_w = luaL_checknumber(L, 1);
+ int aspect_h = luaL_checknumber(L, 2);
+
+ return wrap_lua_object<Scene>(L, "Scene", theme, aspect_w, aspect_h);
+}
+
+int Scene_gc(lua_State* L)
+{
+ assert(lua_gettop(L) == 1);
+ Scene *chain = (Scene *)luaL_checkudata(L, 1, "Scene");
+ chain->~Scene();
+ return 0;
+}
+
+} // namespace
+
+void add_outputs_and_finalize(EffectChain *chain, bool is_main_chain)
+{
+ // Add outputs as needed.
+ // NOTE: If you change any details about the output format, you will need to
+ // also update what's given to the muxer (HTTPD::Mux constructor) and
+ // what's put in the H.264 stream (sps_rbsp()).
+ ImageFormat inout_format;
+ inout_format.color_space = COLORSPACE_REC_709;
+
+ // Output gamma is tricky. We should output Rec. 709 for TV, except that
+ // we expect to run with web players and others that don't really care and
+ // just output with no conversion. So that means we'll need to output sRGB,
+ // even though H.264 has no setting for that (we use “unspecified”).
+ inout_format.gamma_curve = GAMMA_sRGB;
+
+ if (is_main_chain) {
+ YCbCrFormat output_ycbcr_format;
+ // We actually output 4:2:0 and/or 4:2:2 in the end, but chroma subsampling
+ // happens in a pass not run by Movit (see ChromaSubsampler::subsample_chroma()).
+ output_ycbcr_format.chroma_subsampling_x = 1;
+ output_ycbcr_format.chroma_subsampling_y = 1;
+
+ // This will be overridden if HDMI/SDI output is in force.
+ if (global_flags.ycbcr_rec709_coefficients) {
+ output_ycbcr_format.luma_coefficients = YCBCR_REC_709;
+ } else {
+ output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
+ }
+
+ output_ycbcr_format.full_range = false;
+ output_ycbcr_format.num_levels = 1 << global_flags.x264_bit_depth;
+
+ GLenum type = global_flags.x264_bit_depth > 8 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_BYTE;
+
+ chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR, type);
+
+ // If we're using zerocopy video encoding (so the destination
+ // Y texture is owned by VA-API and will be unavailable for
+ // display), add a copy, where we'll only be using the Y component.
+ if (global_flags.use_zerocopy) {
+ chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_INTERLEAVED, type); // Add a copy where we'll only be using the Y component.
+ }
+ chain->set_dither_bits(global_flags.x264_bit_depth > 8 ? 16 : 8);
+ chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
+ } else {
+ chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
+ }
+
+ chain->finalize();
+}
+
+namespace {
+