#include <movit/image_format.h>
#include <movit/init.h>
#include <movit/resource_pool.h>
-#include <movit/util.h>
+#include <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#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"
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));
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();
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) {
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<string> 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) {
+ desired_output_card_index = global_flags.output_card;
+ set_output_card_internal(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<mutex> lock(bmusb_mutex);
+ unique_lock<mutex> lock(card_mutex);
cards[card_index].should_quit = true; // Unblock thread.
cards[card_index].new_frames_changed.notify_all();
}
cards[card_index].capture->stop_dequeue_thread();
+ if (cards[card_index].output) {
+ cards[card_index].output->end_output();
+ cards[card_index].output.reset();
+ }
}
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);
CaptureCard *card = &cards[card_index];
if (card->capture != nullptr) {
card->capture->stop_dequeue_thread();
- delete card->capture;
}
- card->capture = capture;
+ card->capture.reset(capture);
card->is_fake_capture = is_fake_capture;
+ if (card->output.get() != output) {
+ card->output.reset(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.
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_internal(int card_index)
+{
+ // We don't really need to take card_mutex, since we're in the mixer
+ // thread and don't mess with any queues (which is the only thing that happens
+ // from other threads), but it's probably the safest in the long run.
+ unique_lock<mutex> 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();
+
+ // Stop the fake card that we put into place.
+ // This needs to _not_ happen under the mutex, to avoid deadlock
+ // (delivering the last frame needs to take the mutex).
+ bmusb::CaptureInterface *fake_capture = old_card->capture.get();
+ lock.unlock();
+ fake_capture->stop_dequeue_thread();
+ lock.lock();
+ old_card->capture = move(old_card->parked_capture);
+ old_card->is_fake_capture = false;
+ old_card->capture->start_bm_capture();
+ }
+ if (card_index != -1) {
+ CaptureCard *card = &cards[card_index];
+ bmusb::CaptureInterface *capture = card->capture.get();
+ // TODO: DeckLinkCapture::stop_dequeue_thread can actually take
+ // several seconds to complete (blocking on DisableVideoInput);
+ // see if we can maybe do it asynchronously.
+ lock.unlock();
+ capture->stop_dequeue_thread();
+ lock.lock();
+ card->parked_capture = move(card->capture);
+ bmusb::CaptureInterface *fake_capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio);
+ configure_card(card_index, fake_capture, /*is_fake_capture=*/true, card->output.release());
+ 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 {
// 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<double>(steady_clock::now() - last_mode_scan_change[card_index]).count();
if (sec_since_last_switch > switch_time_s) {
// Still send on the information that we _had_ a frame, even though it's corrupted,
// so that pts can go up accordingly.
{
- unique_lock<mutex> lock(bmusb_mutex);
+ unique_lock<mutex> lock(card_mutex);
CaptureCard::NewFrame new_frame;
new_frame.frame = RefCountedFrame(FrameAllocator::Frame());
new_frame.length = frame_length;
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.
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;
// Note that this means we must hold on to the actual frame data in <userdata>
// until the upload command is run, but we hold on to <frame> 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 ||
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) {
}
{
- unique_lock<mutex> lock(bmusb_mutex);
+ unique_lock<mutex> lock(card_mutex);
CaptureCard::NewFrame new_frame;
new_frame.frame = frame;
new_frame.length = frame_length;
void Mixer::thread_func()
{
+ pthread_setname_np(pthread_self(), "Mixer_OpenGL");
+
eglBindAPI(EGL_OPENGL_API);
QOpenGLContext *context = create_context(mixer_surface);
if (!make_current(context, mixer_surface)) {
// 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;
int stats_dropped_frames = 0;
while (!should_quit) {
+ if (desired_output_card_index != output_card_index) {
+ set_output_card_internal(desired_output_card_index);
+ }
+
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);
- schedule_audio_resampling_tasks(output_frame_info.dropped_frames, output_frame_info.num_samples, output_frame_info.frame_duration);
+ 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, output_frame_info.is_preroll);
stats_dropped_frames += output_frame_info.dropped_frames;
handle_hotplugged_cards();
// 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;
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));
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<mutex> 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<mutex> 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, &output_frame_info.is_preroll);
+ lock.lock();
+ } else {
+ // Wait for the master card to have a new frame.
+ // TODO: Add a timeout.
+ output_frame_info.is_preroll = false;
+ 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());
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;
}
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.
}
}
- 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.
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();
}
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;
}
}
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();
}
-void Mixer::schedule_audio_resampling_tasks(unsigned dropped_frames, int num_samples_per_frame, int length_per_frame)
+void Mixer::schedule_audio_resampling_tasks(unsigned dropped_frames, int num_samples_per_frame, int length_per_frame, bool is_preroll)
{
// Resample the audio as needed, including from previously dropped frames.
assert(num_cards > 0);
// since dropped frames are expected to be rare, and it might be
// better to just wait until we have a slightly more normal situation).
unique_lock<mutex> lock(audio_mutex);
- bool adjust_rate = !dropped_frame;
+ bool adjust_rate = !dropped_frame && !is_preroll;
audio_task_queue.push(AudioTask{pts_int, num_samples_per_frame, adjust_rate});
audio_task_queue_changed.notify_one();
}
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.
void Mixer::audio_thread_func()
{
+ pthread_setname_np(pthread_self(), "Mixer_Audio");
+
while (!should_quit) {
AudioTask task;
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) {
projects / nageru / blobdiff