X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=mixer.cpp;h=d55363fa1d367d12aba0cbfd564d327a9c2bfa51;hb=138c12c13443d39f8b1168b5d54b36d9835c6405;hp=db7a060ce392aae209b38d94cfc95ec60d73cf09;hpb=e9f3f2c02ff623eb9e0213cd4eef924a8d699f47;p=nageru diff --git a/mixer.cpp b/mixer.cpp index db7a060..d55363f 100644 --- a/mixer.cpp +++ b/mixer.cpp @@ -10,7 +10,6 @@ #include #include #include -#include #include #include #include @@ -33,8 +32,10 @@ #include "alsa_output.h" #include "bmusb/bmusb.h" #include "bmusb/fake_capture.h" +#include "chroma_subsampler.h" #include "context.h" #include "decklink_capture.h" +#include "decklink_output.h" #include "defs.h" #include "disk_space_estimator.h" #include "flags.h" @@ -108,6 +109,7 @@ Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards) num_cards(num_cards), mixer_surface(create_surface(format)), h264_encoder_surface(create_surface(format)), + decklink_output_surface(create_surface(format)), audio_mixer(num_cards) { CHECK(init_movit(MOVIT_SHADER_DIR, MOVIT_DEBUG_OFF)); @@ -156,7 +158,10 @@ Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards) break; } - configure_card(card_index, new DeckLinkCapture(decklink, card_index), /*is_fake_capture=*/false); + DeckLinkCapture *capture = new DeckLinkCapture(decklink, card_index); + DeckLinkOutput *output = new DeckLinkOutput(resource_pool.get(), decklink_output_surface, global_flags.width, global_flags.height, card_index); + output->set_device(decklink); + configure_card(card_index, capture, /*is_fake_capture=*/false, output); ++num_pci_devices; } decklink_iterator->Release(); @@ -165,18 +170,19 @@ Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards) fprintf(stderr, "DeckLink drivers not found. Probing for USB cards only.\n"); } } + unsigned num_usb_devices = BMUSBCapture::num_cards(); for (unsigned usb_card_index = 0; usb_card_index < num_usb_devices && card_index < num_cards; ++usb_card_index, ++card_index) { BMUSBCapture *capture = new BMUSBCapture(usb_card_index); capture->set_card_disconnected_callback(bind(&Mixer::bm_hotplug_remove, this, card_index)); - configure_card(card_index, capture, /*is_fake_capture=*/false); + configure_card(card_index, capture, /*is_fake_capture=*/false, /*output=*/nullptr); } fprintf(stderr, "Found %u USB card(s).\n", num_usb_devices); unsigned num_fake_cards = 0; for ( ; card_index < num_cards; ++card_index, ++num_fake_cards) { FakeCapture *capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio); - configure_card(card_index, capture, /*is_fake_capture=*/true); + configure_card(card_index, capture, /*is_fake_capture=*/true, /*output=*/nullptr); } if (num_fake_cards > 0) { @@ -190,117 +196,23 @@ Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards) cards[card_index].queue_length_policy.reset(card_index); } - // Set up stuff for NV12 conversion. - // - // Note: Due to the horizontally co-sited chroma/luma samples in H.264 - // (chrome position is left for horizontal and center for vertical), - // we need to be a bit careful in our subsampling. A diagram will make - // this clearer, showing some luma and chroma samples: - // - // a b c d - // +---+---+---+---+ - // | | | | | - // | Y | Y | Y | Y | - // | | | | | - // +---+---+---+---+ - // - // +-------+-------+ - // | | | - // | C | C | - // | | | - // +-------+-------+ - // - // Clearly, the rightmost chroma sample here needs to be equivalent to - // b/4 + c/2 + d/4. (We could also implement more sophisticated filters, - // of course, but as long as the upsampling is not going to be equally - // sophisticated, it's probably not worth it.) If we sample once with - // no mipmapping, we get just c, ie., no actual filtering in the - // horizontal direction. (For the vertical direction, we can just - // sample in the middle to get the right filtering.) One could imagine - // we could use mipmapping (assuming we can create mipmaps cheaply), - // but then, what we'd get is this: - // - // (a+b)/2 (c+d)/2 - // +-------+-------+ - // | | | - // | Y | Y | - // | | | - // +-------+-------+ - // - // +-------+-------+ - // | | | - // | C | C | - // | | | - // +-------+-------+ - // - // which ends up sampling equally from a and b, which clearly isn't right. Instead, - // we need to do two (non-mipmapped) chroma samples, both hitting exactly in-between - // source pixels. - // - // Sampling in-between b and c gives us the sample (b+c)/2, and similarly for c and d. - // Taking the average of these gives of (b+c)/4 + (c+d)/4 = b/4 + c/2 + d/4, which is - // exactly what we want. - // - // See also http://www.poynton.com/PDFs/Merging_RGB_and_422.pdf, pages 6–7. - - // Cb/Cr shader. - string cbcr_vert_shader = - "#version 130 \n" - " \n" - "in vec2 position; \n" - "in vec2 texcoord; \n" - "out vec2 tc0, tc1; \n" - "uniform vec2 foo_chroma_offset_0; \n" - "uniform vec2 foo_chroma_offset_1; \n" - " \n" - "void main() \n" - "{ \n" - " // The result of glOrtho(0.0, 1.0, 0.0, 1.0, 0.0, 1.0) is: \n" - " // \n" - " // 2.000 0.000 0.000 -1.000 \n" - " // 0.000 2.000 0.000 -1.000 \n" - " // 0.000 0.000 -2.000 -1.000 \n" - " // 0.000 0.000 0.000 1.000 \n" - " gl_Position = vec4(2.0 * position.x - 1.0, 2.0 * position.y - 1.0, -1.0, 1.0); \n" - " vec2 flipped_tc = texcoord; \n" - " tc0 = flipped_tc + foo_chroma_offset_0; \n" - " tc1 = flipped_tc + foo_chroma_offset_1; \n" - "} \n"; - string cbcr_frag_shader = - "#version 130 \n" - "in vec2 tc0, tc1; \n" - "uniform sampler2D cbcr_tex; \n" - "out vec4 FragColor; \n" - "void main() { \n" - " FragColor = 0.5 * (texture(cbcr_tex, tc0) + texture(cbcr_tex, tc1)); \n" - "} \n"; - vector frag_shader_outputs; - cbcr_program_num = resource_pool->compile_glsl_program(cbcr_vert_shader, cbcr_frag_shader, frag_shader_outputs); - - float vertices[] = { - 0.0f, 2.0f, - 0.0f, 0.0f, - 2.0f, 0.0f - }; - cbcr_vbo = generate_vbo(2, GL_FLOAT, sizeof(vertices), vertices); - cbcr_texture_sampler_uniform = glGetUniformLocation(cbcr_program_num, "cbcr_tex"); - cbcr_position_attribute_index = glGetAttribLocation(cbcr_program_num, "position"); - cbcr_texcoord_attribute_index = glGetAttribLocation(cbcr_program_num, "texcoord"); + chroma_subsampler.reset(new ChromaSubsampler(resource_pool.get())); if (global_flags.enable_alsa_output) { alsa.reset(new ALSAOutput(OUTPUT_FREQUENCY, /*num_channels=*/2)); } + if (global_flags.output_card != -1) { + set_output_card(global_flags.output_card); + } } Mixer::~Mixer() { - resource_pool->release_glsl_program(cbcr_program_num); - glDeleteBuffers(1, &cbcr_vbo); BMUSBCapture::stop_bm_thread(); for (unsigned card_index = 0; card_index < num_cards; ++card_index) { { - unique_lock lock(bmusb_mutex); + unique_lock lock(card_mutex); cards[card_index].should_quit = true; // Unblock thread. cards[card_index].new_frames_changed.notify_all(); } @@ -310,7 +222,7 @@ Mixer::~Mixer() video_encoder.reset(nullptr); } -void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, bool is_fake_capture) +void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, bool is_fake_capture, DeckLinkOutput *output) { printf("Configuring card %d...\n", card_index); @@ -321,6 +233,7 @@ void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, bool } card->capture = capture; card->is_fake_capture = is_fake_capture; + card->output = output; card->capture->set_frame_callback(bind(&Mixer::bm_frame, this, card_index, _1, _2, _3, _4, _5, _6, _7)); if (card->frame_allocator == nullptr) { card->frame_allocator.reset(new PBOFrameAllocator(8 << 20, global_flags.width, global_flags.height)); // 8 MB. @@ -333,12 +246,44 @@ void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, bool card->last_timecode = -1; card->capture->configure_card(); + // NOTE: start_bm_capture() happens in thread_func(). + DeviceSpec device{InputSourceType::CAPTURE_CARD, card_index}; audio_mixer.reset_resampler(device); audio_mixer.set_display_name(device, card->capture->get_description()); audio_mixer.trigger_state_changed_callback(); } +void Mixer::set_output_card(int card_index) +{ + if (card_index == output_card_index) { + return; + } + unique_lock lock(card_mutex); + if (output_card_index != -1) { + // Switch the old card from output to input. + CaptureCard *old_card = &cards[output_card_index]; + old_card->output->end_output(); + + old_card->capture->stop_dequeue_thread(); + delete old_card->capture; + + old_card->capture = old_card->parked_capture; + old_card->is_fake_capture = false; + old_card->parked_capture = nullptr; + old_card->capture->start_bm_capture(); + } + + CaptureCard *card = &cards[card_index]; + card->capture->stop_dequeue_thread(); + card->parked_capture = card->capture; + FakeCapture *capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio); + configure_card(card_index, capture, /*is_fake_capture=*/true, card->output); + card->queue_length_policy.reset(card_index); + card->capture->start_bm_capture(); + card->output->start_output(bmdModeHD720p5994, pts_int); // FIXME + output_card_index = card_index; +} namespace { @@ -366,7 +311,7 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode, // Found a stable signal, so stop scanning. is_mode_scanning[card_index] = false; } else { - static constexpr double switch_time_s = 0.5; // Should be enough time for the signal to stabilize. + static constexpr double switch_time_s = 0.1; // Should be enough time for the signal to stabilize. steady_clock::time_point now = steady_clock::now(); double sec_since_last_switch = duration(steady_clock::now() - last_mode_scan_change[card_index]).count(); if (sec_since_last_switch > switch_time_s) { @@ -444,7 +389,7 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode, // Still send on the information that we _had_ a frame, even though it's corrupted, // so that pts can go up accordingly. { - unique_lock lock(bmusb_mutex); + unique_lock lock(card_mutex); CaptureCard::NewFrame new_frame; new_frame.frame = RefCountedFrame(FrameAllocator::Frame()); new_frame.length = frame_length; @@ -460,6 +405,7 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode, unsigned num_fields = video_format.interlaced ? 2 : 1; steady_clock::time_point frame_upload_start; + bool interlaced_stride = false; if (video_format.interlaced) { // Send the two fields along as separate frames; the other side will need to add // a deinterlacer to actually get this right. @@ -468,6 +414,9 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode, assert(frame_length % 2 == 0); frame_length /= 2; num_fields = 2; + if (video_format.second_field_start == 1) { + interlaced_stride = true; + } frame_upload_start = steady_clock::now(); } userdata->last_interlaced = video_format.interlaced; @@ -491,8 +440,13 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode, // Note that this means we must hold on to the actual frame data in // until the upload command is run, but we hold on to much longer than that // (in fact, all the way until we no longer use the texture in rendering). - auto upload_func = [field, video_format, y_offset, cbcr_offset, cbcr_width, userdata]() { - unsigned field_start_line = (field == 1) ? video_format.second_field_start : video_format.extra_lines_top + field * (video_format.height + 22); + auto upload_func = [field, video_format, y_offset, cbcr_offset, cbcr_width, interlaced_stride, userdata]() { + unsigned field_start_line; + if (field == 1) { + field_start_line = video_format.second_field_start; + } else { + field_start_line = video_format.extra_lines_top; + } if (userdata->tex_y[field] == 0 || userdata->tex_cbcr[field] == 0 || @@ -530,16 +484,32 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode, glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr[field]); check_error(); + if (interlaced_stride) { + glPixelStorei(GL_UNPACK_ROW_LENGTH, cbcr_width * 2); + check_error(); + } else { + glPixelStorei(GL_UNPACK_ROW_LENGTH, 0); + check_error(); + } glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, cbcr_width, video_format.height, GL_RG, GL_UNSIGNED_BYTE, BUFFER_OFFSET(field_cbcr_start)); check_error(); glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]); check_error(); + if (interlaced_stride) { + glPixelStorei(GL_UNPACK_ROW_LENGTH, video_format.width * 2); + check_error(); + } else { + glPixelStorei(GL_UNPACK_ROW_LENGTH, 0); + check_error(); + } glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, video_format.width, video_format.height, GL_RED, GL_UNSIGNED_BYTE, BUFFER_OFFSET(field_y_start)); check_error(); glBindTexture(GL_TEXTURE_2D, 0); check_error(); glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0); check_error(); + glPixelStorei(GL_UNPACK_ROW_LENGTH, 0); + check_error(); }; if (field == 1) { @@ -555,7 +525,7 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode, } { - unique_lock lock(bmusb_mutex); + unique_lock lock(card_mutex); CaptureCard::NewFrame new_frame; new_frame.frame = frame; new_frame.length = frame_length; @@ -593,7 +563,9 @@ void Mixer::thread_func() // Start the actual capture. (We don't want to do it before we're actually ready // to process output frames.) for (unsigned card_index = 0; card_index < num_cards; ++card_index) { - cards[card_index].capture->start_bm_capture(); + if (int(card_index) != output_card_index) { + cards[card_index].capture->start_bm_capture(); + } } steady_clock::time_point start, now; @@ -606,10 +578,18 @@ void Mixer::thread_func() CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS]; bool has_new_frame[MAX_VIDEO_CARDS] = { false }; - unsigned master_card_index = theme->map_signal(master_clock_channel); - assert(master_card_index < num_cards); + bool master_card_is_output; + unsigned master_card_index; + if (output_card_index != -1) { + master_card_is_output = true; + master_card_index = output_card_index; + } else { + master_card_is_output = false; + master_card_index = theme->map_signal(master_clock_channel); + assert(master_card_index < num_cards); + } - OutputFrameInfo output_frame_info = get_one_frame_from_each_card(master_card_index, new_frames, has_new_frame); + OutputFrameInfo output_frame_info = get_one_frame_from_each_card(master_card_index, master_card_is_output, new_frames, has_new_frame); schedule_audio_resampling_tasks(output_frame_info.dropped_frames, output_frame_info.num_samples, output_frame_info.frame_duration); stats_dropped_frames += output_frame_info.dropped_frames; @@ -630,7 +610,7 @@ void Mixer::thread_func() // If the first card is reporting a corrupted or otherwise dropped frame, // just increase the pts (skipping over this frame) and don't try to compute anything new. - if (new_frames[master_card_index].frame->len == 0) { + if (!master_card_is_output && new_frames[master_card_index].frame->len == 0) { ++stats_dropped_frames; pts_int += new_frames[master_card_index].length; continue; @@ -680,10 +660,15 @@ void Mixer::thread_func() assert(false); } - printf(", using %ld / %ld MB lockable memory (%.1f%%)", - long(used.ru_maxrss / 1024), - long(limit.rlim_cur / 1048576), - float(100.0 * (used.ru_maxrss * 1024.0) / limit.rlim_cur)); + if (limit.rlim_cur == 0) { + printf(", using %ld MB memory (locked)", + long(used.ru_maxrss / 1024)); + } else { + printf(", using %ld / %ld MB lockable memory (%.1f%%)", + long(used.ru_maxrss / 1024), + long(limit.rlim_cur / 1048576), + float(100.0 * (used.ru_maxrss * 1024.0) / limit.rlim_cur)); + } } else { printf(", using %ld MB memory (not locked)", long(used.ru_maxrss / 1024)); @@ -713,17 +698,35 @@ void Mixer::thread_func() resource_pool->clean_context(); } -Mixer::OutputFrameInfo Mixer::get_one_frame_from_each_card(unsigned master_card_index, CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS], bool has_new_frame[MAX_VIDEO_CARDS]) +bool Mixer::input_card_is_master_clock(unsigned card_index, unsigned master_card_index) const { - OutputFrameInfo output_frame_info; + if (output_card_index != -1) { + // The output card (ie., cards[output_card_index].output) is the master clock, + // so no input card (ie., cards[card_index].capture) is. + return false; + } + return (card_index == master_card_index); +} +Mixer::OutputFrameInfo Mixer::get_one_frame_from_each_card(unsigned master_card_index, bool master_card_is_output, CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS], bool has_new_frame[MAX_VIDEO_CARDS]) +{ + OutputFrameInfo output_frame_info; start: - // The first card is the master timer, so wait for it to have a new frame. - // TODO: Add a timeout. - unique_lock lock(bmusb_mutex); - cards[master_card_index].new_frames_changed.wait(lock, [this, master_card_index]{ return !cards[master_card_index].new_frames.empty() || cards[master_card_index].capture->get_disconnected(); }); + unique_lock lock(card_mutex, defer_lock); + if (master_card_is_output) { + // Clocked to the output, so wait for it to be ready for the next frame. + cards[master_card_index].output->wait_for_frame(pts_int, &output_frame_info.dropped_frames, &output_frame_info.frame_duration); + lock.lock(); + } else { + // Wait for the master card to have a new frame. + // TODO: Add a timeout. + lock.lock(); + cards[master_card_index].new_frames_changed.wait(lock, [this, master_card_index]{ return !cards[master_card_index].new_frames.empty() || cards[master_card_index].capture->get_disconnected(); }); + } - if (cards[master_card_index].new_frames.empty()) { + if (master_card_is_output) { + handle_hotplugged_cards(); + } else if (cards[master_card_index].new_frames.empty()) { // We were woken up, but not due to a new frame. Deal with it // and then restart. assert(cards[master_card_index].capture->get_disconnected()); @@ -734,7 +737,7 @@ start: for (unsigned card_index = 0; card_index < num_cards; ++card_index) { CaptureCard *card = &cards[card_index]; if (card->new_frames.empty()) { - assert(card_index != master_card_index); + assert(!input_card_is_master_clock(card_index, master_card_index)); card->queue_length_policy.update_policy(-1); continue; } @@ -743,7 +746,7 @@ start: card->new_frames.pop(); card->new_frames_changed.notify_all(); - if (card_index == master_card_index) { + if (input_card_is_master_clock(card_index, master_card_index)) { // We don't use the queue length policy for the master card, // but we will if it stops being the master. Thus, clear out // the policy in case we switch in the future. @@ -758,8 +761,10 @@ start: } } - output_frame_info.dropped_frames = new_frames[master_card_index].dropped_frames; - output_frame_info.frame_duration = new_frames[master_card_index].length; + if (!master_card_is_output) { + output_frame_info.dropped_frames = new_frames[master_card_index].dropped_frames; + output_frame_info.frame_duration = new_frames[master_card_index].length; + } // This might get off by a fractional sample when changing master card // between ones with different frame rates, but that's fine. @@ -779,7 +784,7 @@ void Mixer::handle_hotplugged_cards() if (card->capture->get_disconnected()) { fprintf(stderr, "Card %u went away, replacing with a fake card.\n", card_index); FakeCapture *capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio); - configure_card(card_index, capture, /*is_fake_capture=*/true); + configure_card(card_index, capture, /*is_fake_capture=*/true, /*output=*/nullptr); card->queue_length_policy.reset(card_index); card->capture->start_bm_capture(); } @@ -796,7 +801,7 @@ void Mixer::handle_hotplugged_cards() int free_card_index = -1; for (unsigned card_index = 0; card_index < num_cards; ++card_index) { if (cards[card_index].is_fake_capture) { - free_card_index = int(card_index); + free_card_index = card_index; break; } } @@ -809,7 +814,7 @@ void Mixer::handle_hotplugged_cards() fprintf(stderr, "New card plugged in, choosing slot %d.\n", free_card_index); CaptureCard *card = &cards[free_card_index]; BMUSBCapture *capture = new BMUSBCapture(free_card_index, new_dev); - configure_card(free_card_index, capture, /*is_fake_capture=*/false); + configure_card(free_card_index, capture, /*is_fake_capture=*/false, /*output=*/nullptr); card->queue_length_policy.reset(free_card_index); capture->set_card_disconnected_callback(bind(&Mixer::bm_hotplug_remove, this, free_card_index)); capture->start_bm_capture(); @@ -872,7 +877,10 @@ void Mixer::render_one_frame(int64_t duration) chain->render_to_fbo(fbo, global_flags.width, global_flags.height); resource_pool->release_fbo(fbo); - subsample_chroma(cbcr_full_tex, cbcr_tex); + chroma_subsampler->subsample_chroma(cbcr_full_tex, global_flags.width, global_flags.height, cbcr_tex); + if (output_card_index != -1) { + cards[output_card_index].output->send_frame(y_tex, cbcr_full_tex, theme_main_chain.input_frames, pts_int, duration); + } resource_pool->release_2d_texture(cbcr_full_tex); // Set the right state for rgba_tex. @@ -936,73 +944,14 @@ void Mixer::audio_thread_func() if (alsa) { alsa->write(samples_out); } + if (output_card_index != -1) { + const int64_t av_delay = lrint(global_flags.audio_queue_length_ms * 0.001 * TIMEBASE); // Corresponds to the delay in ResamplingQueue. + cards[output_card_index].output->send_audio(task.pts_int + av_delay, samples_out); + } video_encoder->add_audio(task.pts_int, move(samples_out)); } } -void Mixer::subsample_chroma(GLuint src_tex, GLuint dst_tex) -{ - GLuint vao; - glGenVertexArrays(1, &vao); - check_error(); - - glBindVertexArray(vao); - check_error(); - - // Extract Cb/Cr. - GLuint fbo = resource_pool->create_fbo(dst_tex); - glBindFramebuffer(GL_FRAMEBUFFER, fbo); - glViewport(0, 0, global_flags.width/2, global_flags.height/2); - check_error(); - - glUseProgram(cbcr_program_num); - check_error(); - - glActiveTexture(GL_TEXTURE0); - check_error(); - glBindTexture(GL_TEXTURE_2D, src_tex); - check_error(); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - check_error(); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); - check_error(); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); - check_error(); - - float chroma_offset_0[] = { -1.0f / global_flags.width, 0.0f }; - float chroma_offset_1[] = { -0.0f / global_flags.width, 0.0f }; - set_uniform_vec2(cbcr_program_num, "foo", "chroma_offset_0", chroma_offset_0); - set_uniform_vec2(cbcr_program_num, "foo", "chroma_offset_1", chroma_offset_1); - - glUniform1i(cbcr_texture_sampler_uniform, 0); - - glBindBuffer(GL_ARRAY_BUFFER, cbcr_vbo); - check_error(); - - for (GLint attr_index : { cbcr_position_attribute_index, cbcr_texcoord_attribute_index }) { - glEnableVertexAttribArray(attr_index); - check_error(); - glVertexAttribPointer(attr_index, 2, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0)); - check_error(); - } - - glDrawArrays(GL_TRIANGLES, 0, 3); - check_error(); - - for (GLint attr_index : { cbcr_position_attribute_index, cbcr_texcoord_attribute_index }) { - glDisableVertexAttribArray(attr_index); - check_error(); - } - - glUseProgram(0); - check_error(); - glBindFramebuffer(GL_FRAMEBUFFER, 0); - check_error(); - - resource_pool->release_fbo(fbo); - glDeleteVertexArrays(1, &vao); -} - void Mixer::release_display_frame(DisplayFrame *frame) { for (GLuint texnum : frame->temp_textures) {