1 #include "ycbcr_converter.h"
3 #include "jpeg_frame.h"
5 #include <movit/mix_effect.h>
6 #include <movit/ycbcr_input.h>
13 void setup_outputs(YCbCrConverter::OutputMode output_mode, const ImageFormat &output_format, const YCbCrFormat &ycbcr_output_format, EffectChain *chain)
15 if (output_mode == YCbCrConverter::OUTPUT_TO_RGBA) {
16 chain->add_output(output_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
17 chain->set_output_origin(OUTPUT_ORIGIN_BOTTOM_LEFT);
18 } else if (output_mode == YCbCrConverter::OUTPUT_TO_SEMIPLANAR) {
19 chain->add_ycbcr_output(output_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, ycbcr_output_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR);
20 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
22 assert(output_mode == YCbCrConverter::OUTPUT_TO_DUAL_YCBCR);
24 // One full Y'CbCr texture (for interpolation), one that's just Y (throwing away the
25 // Cb and Cr channels). The second copy is sort of redundant, but it's the easiest way
26 // of getting the gray data into a layered texture.
27 chain->add_ycbcr_output(output_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, ycbcr_output_format);
28 chain->add_ycbcr_output(output_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, ycbcr_output_format);
29 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
35 YCbCrConverter::YCbCrConverter(YCbCrConverter::OutputMode output_mode, ResourcePool *resource_pool)
37 ImageFormat inout_format;
38 inout_format.color_space = COLORSPACE_sRGB;
39 inout_format.gamma_curve = GAMMA_sRGB;
41 ycbcr_format.luma_coefficients = YCBCR_REC_709;
42 ycbcr_format.num_levels = 256;
43 ycbcr_format.chroma_subsampling_x = 2;
44 ycbcr_format.chroma_subsampling_y = 1;
45 ycbcr_format.cb_x_position = 0.0f; // H.264 -- _not_ JPEG, even though our input is MJPEG-encoded
46 ycbcr_format.cb_y_position = 0.5f; // Irrelevant.
47 ycbcr_format.cr_x_position = 0.0f;
48 ycbcr_format.cr_y_position = 0.5f;
50 // This is a hack. Even though we're sending MJPEG around, which is
51 // full-range, it's mostly transporting signals from limited-range
52 // sources with no conversion, so we ought to have had false here.
53 // However, in the off chance that we're actually getting real MJPEG,
54 // we don't want to crush its blacks (or whites) by clamping. All of
55 // our processing is fades, so if we're in limited-range input, we'll
56 // stay in limited-range output. (Fading between limited-range and
57 // full-range sources will be broken, of course.) There will be some
58 // slight confusion in the parts of the algorithms dealing with RGB,
59 // but they're small and we'll manage.
60 ycbcr_format.full_range = true;
62 YCbCrFormat ycbcr_output_format = ycbcr_format;
63 ycbcr_output_format.chroma_subsampling_x = 1;
65 // Planar Y'CbCr decoding chain.
66 planar_chain.reset(new EffectChain(1280, 720, resource_pool));
67 ycbcr_planar_input = (YCbCrInput *)planar_chain->add_input(new YCbCrInput(inout_format, ycbcr_format, 1280, 720, YCBCR_INPUT_PLANAR));
68 setup_outputs(output_mode, inout_format, ycbcr_output_format, planar_chain.get());
69 planar_chain->set_dither_bits(8);
70 planar_chain->finalize();
72 // Semiplanar Y'CbCr decoding chain (for images coming from VA-API).
73 semiplanar_chain.reset(new EffectChain(1280, 720, resource_pool));
74 ycbcr_semiplanar_input = (YCbCrInput *)semiplanar_chain->add_input(new YCbCrInput(inout_format, ycbcr_format, 1280, 720, YCBCR_INPUT_SPLIT_Y_AND_CBCR));
75 setup_outputs(output_mode, inout_format, ycbcr_output_format, semiplanar_chain.get());
76 semiplanar_chain->set_dither_bits(8);
77 semiplanar_chain->finalize();
80 for (bool first_input_is_semiplanar : { false, true }) {
81 for (bool second_input_is_semiplanar : { false, true }) {
82 FadeChain &fade_chain = fade_chains[first_input_is_semiplanar][second_input_is_semiplanar];
83 fade_chain.chain.reset(new EffectChain(1280, 720, resource_pool));
84 fade_chain.input[0] = (movit::YCbCrInput *)fade_chain.chain->add_input(
85 new YCbCrInput(inout_format, ycbcr_format, 1280, 720,
86 first_input_is_semiplanar ? YCBCR_INPUT_SPLIT_Y_AND_CBCR : YCBCR_INPUT_PLANAR));
87 fade_chain.input[1] = (movit::YCbCrInput *)fade_chain.chain->add_input(
88 new YCbCrInput(inout_format, ycbcr_format, 1280, 720,
89 second_input_is_semiplanar ? YCBCR_INPUT_SPLIT_Y_AND_CBCR : YCBCR_INPUT_PLANAR));
90 fade_chain.mix_effect = (movit::MixEffect *)fade_chain.chain->add_effect(
91 new MixEffect, fade_chain.input[0], fade_chain.input[1]);
92 setup_outputs(output_mode, inout_format, ycbcr_output_format, fade_chain.chain.get());
93 fade_chain.chain->set_dither_bits(8);
94 fade_chain.chain->finalize();
98 // Fade from interleaved chain (ie., first input is interleaved, since it comes
99 // directly from the GPU anyway).
100 for (bool second_input_is_semiplanar : { false, true }) {
101 FadeChain &fade_chain = interleaved_fade_chains[second_input_is_semiplanar];
102 fade_chain.chain.reset(new EffectChain(1280, 720, resource_pool));
104 ycbcr_format.chroma_subsampling_x = 1;
105 fade_chain.input[0] = (movit::YCbCrInput *)fade_chain.chain->add_input(
106 new YCbCrInput(inout_format, ycbcr_format, 1280, 720,
107 YCBCR_INPUT_INTERLEAVED));
109 ycbcr_format.chroma_subsampling_x = 2;
110 fade_chain.input[1] = (movit::YCbCrInput *)fade_chain.chain->add_input(
111 new YCbCrInput(inout_format, ycbcr_format, 1280, 720,
112 second_input_is_semiplanar ? YCBCR_INPUT_SPLIT_Y_AND_CBCR : YCBCR_INPUT_PLANAR));
114 fade_chain.mix_effect = (movit::MixEffect *)fade_chain.chain->add_effect(
115 new MixEffect, fade_chain.input[0], fade_chain.input[1]);
116 setup_outputs(output_mode, inout_format, ycbcr_output_format, fade_chain.chain.get());
117 fade_chain.chain->set_dither_bits(8);
118 fade_chain.chain->finalize();
122 EffectChain *YCbCrConverter::prepare_chain_for_conversion(shared_ptr<Frame> frame)
124 if (frame->is_semiplanar) {
125 setup_input_for_frame(frame, ycbcr_format, ycbcr_semiplanar_input);
126 return semiplanar_chain.get();
128 setup_input_for_frame(frame, ycbcr_format, ycbcr_planar_input);
129 return planar_chain.get();
133 EffectChain *YCbCrConverter::prepare_chain_for_fade(shared_ptr<Frame> frame, shared_ptr<Frame> secondary_frame, float fade_alpha)
135 const FadeChain &fade_chain = fade_chains[frame->is_semiplanar][secondary_frame->is_semiplanar];
136 setup_input_for_frame(frame, ycbcr_format, fade_chain.input[0]);
137 setup_input_for_frame(secondary_frame, ycbcr_format, fade_chain.input[1]);
138 bool ok = fade_chain.mix_effect->set_float("strength_first", 1.0f - fade_alpha);
139 ok |= fade_chain.mix_effect->set_float("strength_second", fade_alpha);
141 return fade_chain.chain.get();
144 EffectChain *YCbCrConverter::prepare_chain_for_fade_from_texture(GLuint tex, std::shared_ptr<Frame> secondary_frame, float fade_alpha)
146 const FadeChain &fade_chain = interleaved_fade_chains[secondary_frame->is_semiplanar];
148 YCbCrFormat format_copy = ycbcr_format;
149 format_copy.chroma_subsampling_x = 1;
150 format_copy.chroma_subsampling_y = 1;
151 fade_chain.input[0]->change_ycbcr_format(format_copy);
153 fade_chain.input[0]->set_width(1280); // FIXME
154 fade_chain.input[0]->set_height(720);
155 fade_chain.input[0]->set_texture_num(0, tex);
157 glTextureParameteri(tex, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
158 glTextureParameteri(tex, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
159 glTextureParameteri(tex, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
160 glTextureParameteri(tex, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
162 setup_input_for_frame(secondary_frame, ycbcr_format, fade_chain.input[1]);
163 bool ok = fade_chain.mix_effect->set_float("strength_first", 1.0f - fade_alpha);
164 ok |= fade_chain.mix_effect->set_float("strength_second", fade_alpha);
166 return fade_chain.chain.get();
169 void setup_input_for_frame(shared_ptr<Frame> frame, const YCbCrFormat &ycbcr_format, YCbCrInput *input)
171 YCbCrFormat format_copy = ycbcr_format;
172 format_copy.chroma_subsampling_x = frame->chroma_subsampling_x;
173 format_copy.chroma_subsampling_y = frame->chroma_subsampling_y;
174 input->change_ycbcr_format(format_copy);
176 input->set_width(frame->width);
177 input->set_height(frame->height);
178 input->set_pixel_data(0, frame->y.get());
179 input->set_pitch(0, frame->pitch_y);
180 if (frame->is_semiplanar) {
181 input->set_pixel_data(1, frame->cbcr.get());
182 input->set_pitch(1, frame->pitch_chroma);
184 input->set_pixel_data(1, frame->cb.get());
185 input->set_pixel_data(2, frame->cr.get());
186 input->set_pitch(1, frame->pitch_chroma);
187 input->set_pitch(2, frame->pitch_chroma);