#include "mixer.h"
#include <assert.h>
-#include <effect.h>
-#include <effect_chain.h>
-#include <effect_util.h>
#include <epoxy/egl.h>
-#include <features.h>
-#include <image_format.h>
#include <init.h>
-#include <overlay_effect.h>
-#include <padding_effect.h>
-#include <resample_effect.h>
-#include <resource_pool.h>
-#include <saturation_effect.h>
+#include <movit/effect_chain.h>
+#include <movit/effect_util.h>
+#include <movit/flat_input.h>
+#include <movit/image_format.h>
+#include <movit/resource_pool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <time.h>
#include <util.h>
-#include <white_balance_effect.h>
-#include <ycbcr.h>
-#include <ycbcr_input.h>
+#include <algorithm>
#include <cmath>
#include <condition_variable>
#include <cstddef>
#include <mutex>
#include <string>
#include <thread>
+#include <utility>
#include <vector>
#include "bmusb/bmusb.h"
} // namespace
-Mixer::Mixer(const QSurfaceFormat &format)
- : mixer_surface(create_surface(format)),
- h264_encoder_surface(create_surface(format))
+Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards)
+ : httpd("test.ts", WIDTH, HEIGHT),
+ num_cards(num_cards),
+ mixer_surface(create_surface(format)),
+ h264_encoder_surface(create_surface(format)),
+ level_compressor(48000.0f)
{
httpd.start(9095);
CHECK(init_movit(MOVIT_SHADER_DIR, MOVIT_DEBUG_OFF));
check_error();
+ // Since we allow non-bouncing 4:2:2 YCbCrInputs, effective subpixel precision
+ // will be halved when sampling them, and we need to compensate here.
+ movit_texel_subpixel_precision /= 2.0;
+
resource_pool.reset(new ResourcePool);
- theme.reset(new Theme("theme.lua", resource_pool.get()));
- output_channel[OUTPUT_LIVE].parent = this;
- output_channel[OUTPUT_PREVIEW].parent = this;
- output_channel[OUTPUT_INPUT0].parent = this;
- output_channel[OUTPUT_INPUT1].parent = this;
+ theme.reset(new Theme("theme.lua", resource_pool.get(), num_cards));
+ for (unsigned i = 0; i < NUM_OUTPUTS; ++i) {
+ output_channel[i].parent = this;
+ }
ImageFormat inout_format;
inout_format.color_space = COLORSPACE_sRGB;
display_chain->set_dither_bits(0); // Don't bother.
display_chain->finalize();
- h264_encoder.reset(new H264Encoder(h264_encoder_surface, WIDTH, HEIGHT, "test.ts", &httpd));
+ h264_encoder.reset(new H264Encoder(h264_encoder_surface, WIDTH, HEIGHT, &httpd));
- for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
+ for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
printf("Configuring card %d...\n", card_index);
CaptureCard *card = &cards[card_index];
card->usb = new BMUSBCapture(card_index);
card->usb->set_dequeue_thread_callbacks(
[card]{
eglBindAPI(EGL_OPENGL_API);
- card->context = create_context();
+ card->context = create_context(card->surface);
if (!make_current(card->context, card->surface)) {
printf("failed to create bmusb context\n");
exit(1);
}
- printf("inited!\n");
},
[this]{
resource_pool->clean_context();
BMUSBCapture::start_bm_thread();
- for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
+ for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
cards[card_index].usb->start_bm_capture();
}
" gl_FragColor = texture2D(cbcr_tex, tc0); \n"
"} \n";
cbcr_program_num = resource_pool->compile_glsl_program(cbcr_vert_shader, cbcr_frag_shader);
+
+ r128.init(2, 48000);
+ r128.integr_start();
}
Mixer::~Mixer()
resource_pool->release_glsl_program(cbcr_program_num);
BMUSBCapture::stop_bm_thread();
- for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
+ for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
{
unique_lock<mutex> lock(bmusb_mutex);
cards[card_index].should_quit = true; // Unblock thread.
}
}
+float find_peak(const vector<float> &samples)
+{
+ float m = fabs(samples[0]);
+ for (size_t i = 1; i < samples.size(); ++i) {
+ m = std::max(m, fabs(samples[i]));
+ }
+ return m;
+}
+
+void deinterleave_samples(const vector<float> &in, vector<float> *out_l, vector<float> *out_r)
+{
+ size_t num_samples = in.size() / 2;
+ out_l->resize(num_samples);
+ out_r->resize(num_samples);
+
+ const float *inptr = in.data();
+ float *lptr = &(*out_l)[0];
+ float *rptr = &(*out_r)[0];
+ for (size_t i = 0; i < num_samples; ++i) {
+ *lptr++ = *inptr++;
+ *rptr++ = *inptr++;
+ }
+}
+
} // namespace
-void Mixer::bm_frame(int card_index, uint16_t timecode,
+void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
FrameAllocator::Frame video_frame, size_t video_offset, uint16_t video_format,
FrameAllocator::Frame audio_frame, size_t audio_offset, uint16_t audio_format)
{
return;
}
- // Convert the audio to stereo fp32 and add it.
- size_t num_samples = (audio_frame.len - audio_offset) / 8 / 3;
- vector<float> audio;
- audio.resize(num_samples * 2);
- convert_fixed24_to_fp32(&audio[0], 2, audio_frame.data + audio_offset, 8, num_samples);
-
int unwrapped_timecode = timecode;
int dropped_frames = 0;
if (card->last_timecode != -1) {
}
card->last_timecode = unwrapped_timecode;
+ // Convert the audio to stereo fp32 and add it.
+ size_t num_samples = (audio_frame.len >= audio_offset) ? (audio_frame.len - audio_offset) / 8 / 3 : 0;
+ vector<float> audio;
+ audio.resize(num_samples * 2);
+ convert_fixed24_to_fp32(&audio[0], 2, audio_frame.data + audio_offset, 8, num_samples);
+
// Add the audio.
{
unique_lock<mutex> lock(card->audio_mutex);
void Mixer::thread_func()
{
eglBindAPI(EGL_OPENGL_API);
- QOpenGLContext *context = create_context();
+ QOpenGLContext *context = create_context(mixer_surface);
if (!make_current(context, mixer_surface)) {
printf("oops\n");
exit(1);
int dropped_frames = 0;
while (!should_quit) {
- CaptureCard card_copy[NUM_CARDS];
+ CaptureCard card_copy[MAX_CARDS];
{
unique_lock<mutex> lock(bmusb_mutex);
// TODO: Make configurable, and with a timeout.
cards[0].new_data_ready_changed.wait(lock, [this]{ return cards[0].new_data_ready; });
- for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
+ for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
CaptureCard *card = &cards[card_index];
card_copy[card_index].usb = card->usb;
card_copy[card_index].new_data_ready = card->new_data_ready;
card_copy[card_index].new_frame = card->new_frame;
card_copy[card_index].new_data_ready_fence = card->new_data_ready_fence;
- card_copy[card_index].new_frame_audio = move(card->new_frame_audio);
card_copy[card_index].dropped_frames = card->dropped_frames;
card->new_data_ready = false;
card->new_data_ready_changed.notify_all();
}
// Resample the audio as needed, including from previously dropped frames.
- vector<float> samples_out;
- // TODO: Allow using audio from the other card(s) as well.
for (unsigned frame_num = 0; frame_num < card_copy[0].dropped_frames + 1; ++frame_num) {
- for (unsigned card_index = 0; card_index < NUM_CARDS; ++card_index) {
- samples_out.resize((48000 / 60) * 2);
- {
- unique_lock<mutex> lock(cards[card_index].audio_mutex);
- if (!cards[card_index].resampler->get_output_samples(pts(), &samples_out[0], 48000 / 60)) {
- printf("Card %d reported previous underrun.\n", card_index);
- }
- }
- if (card_index == 0) {
- h264_encoder->add_audio(pts_int, move(samples_out));
- }
- }
+ process_audio_one_frame();
if (frame_num != card_copy[0].dropped_frames) {
// For dropped frames, increase the pts.
++dropped_frames;
}
}
+ if (audio_level_callback != nullptr) {
+ double loudness_s = r128.loudness_S();
+ double loudness_i = r128.integrated();
+ double loudness_range_low = r128.range_min();
+ double loudness_range_high = r128.range_max();
+
+ audio_level_callback(loudness_s, 20.0 * log10(peak),
+ loudness_i, loudness_range_low, loudness_range_high);
+ }
+
+ for (unsigned card_index = 1; card_index < num_cards; ++card_index) {
+ if (card_copy[card_index].new_data_ready && card_copy[card_index].new_frame->len == 0) {
+ ++card_copy[card_index].dropped_frames;
+ }
+ if (card_copy[card_index].dropped_frames > 0) {
+ printf("Card %u dropped %d frames before this\n",
+ card_index, int(card_copy[card_index].dropped_frames));
+ }
+ }
+
// 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 (card_copy[0].new_frame->len == 0) {
continue;
}
- for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
+ for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
CaptureCard *card = &card_copy[card_index];
if (!card->new_data_ready || card->new_frame->len == 0)
continue;
GLuint cbcr_full_tex = resource_pool->create_2d_texture(GL_RG8, WIDTH, HEIGHT);
GLuint rgba_tex = resource_pool->create_2d_texture(GL_RGB565, WIDTH, HEIGHT); // Saves texture bandwidth, although dithering gets messed up.
GLuint fbo = resource_pool->create_fbo(y_tex, cbcr_full_tex, rgba_tex);
+ check_error();
chain->render_to_fbo(fbo, WIDTH, HEIGHT);
resource_pool->release_fbo(fbo);
// input frames needed, so that they are not released back
// until the rendering is done.
vector<RefCountedFrame> input_frames;
- for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
+ for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
input_frames.push_back(bmusb_current_rendering_frame[card_index]);
}
const int64_t av_delay = TIMEBASE / 10; // Corresponds to the fixed delay in resampler.h. TODO: Make less hard-coded.
display_frame.chain = chain.first;
display_frame.setup_chain = chain.second;
display_frame.ready_fence = fence;
- display_frame.input_frames = { bmusb_current_rendering_frame[0], bmusb_current_rendering_frame[1] }; // FIXME: possible to do better?
+
+ // FIXME: possible to do better?
+ for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
+ display_frame.input_frames.push_back(bmusb_current_rendering_frame[card_index]);
+ }
display_frame.temp_textures = {};
output_channel[i].output_frame(display_frame);
}
resource_pool->clean_context();
}
+void Mixer::process_audio_one_frame()
+{
+ vector<float> samples_card;
+ vector<float> samples_out;
+ for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
+ samples_card.resize((48000 / 60) * 2);
+ {
+ unique_lock<mutex> lock(cards[card_index].audio_mutex);
+ if (!cards[card_index].resampler->get_output_samples(pts(), &samples_card[0], 48000 / 60)) {
+ printf("Card %d reported previous underrun.\n", card_index);
+ }
+ }
+ // TODO: Allow using audio from the other card(s) as well.
+ if (card_index == 0) {
+ samples_out = move(samples_card);
+ }
+ }
+
+ // Apply a level compressor to get the general level right.
+ // Basically, if it's over about -40 dBFS, we squeeze it down to that level
+ // (or more precisely, near it, since we don't use infinite ratio),
+ // then apply a makeup gain to get it to -12 dBFS. -12 dBFS is, of course,
+ // entirely arbitrary, but from practical tests with speech, it seems to
+ // put ut around -23 LUFS, so it's a reasonable starting point for later use.
+ //
+ // TODO: Hook this up to a UI, so we can see the effects, and/or turn it off
+ // to control the gain manually instead. For now, there's only the #if-ed out
+ // code below.
+ //
+ // TODO: Add the actual compressors/limiters (for taking care of transients)
+ // later in the chain.
+ float threshold = 0.01f; // -40 dBFS.
+ float ratio = 20.0f;
+ float attack_time = 0.1f;
+ float release_time = 10.0f;
+ float makeup_gain = pow(10.0f, 28.0f / 20.0f); // +28 dB takes us to -12 dBFS.
+ level_compressor.process(samples_out.data(), samples_out.size() / 2, threshold, ratio, attack_time, release_time, makeup_gain);
+
+#if 0
+ printf("level=%f (%+5.2f dBFS) attenuation=%f (%+5.2f dB) end_result=%+5.2f dB\n",
+ compressor.get_level(), 20.0 * log10(compressor.get_level()),
+ compressor.get_attenuation(), 20.0 * log10(compressor.get_attenuation()),
+ 20.0 * log10(compressor.get_level() * compressor.get_attenuation() * makeup_gain));
+#endif
+
+ // Find peak and R128 levels.
+ peak = std::max(peak, find_peak(samples_out));
+ vector<float> left, right;
+ deinterleave_samples(samples_out, &left, &right);
+ float *ptrs[] = { left.data(), right.data() };
+ r128.process(left.size(), ptrs);
+
+ // Actually add the samples to the output.
+ h264_encoder->add_audio(pts_int, move(samples_out));
+}
+
void Mixer::subsample_chroma(GLuint src_tex, GLuint dst_tex)
{
GLuint vao;
projects / nageru / blobdiff