195 lines
6.6 KiB
C++
195 lines
6.6 KiB
C++
#include <cstring>
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#include <cmath>
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#include <VulcanoLE/Audio/AudioGrabber.h>
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#include <VUtils/Logging.h>
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AudioGrabber::AudioGrabber() = default;
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AudioGrabber::~AudioGrabber() = default;
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bool AudioGrabber::read(pcm_stereo_sample *buffer, uint32_t buffer_size) {
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auto buffer_size_bytes = static_cast<size_t>(sizeof(pcm_stereo_sample) * buffer_size);
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if (m_pulseaudio_simple == nullptr) {
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open_pulseaudio_source(static_cast<uint32_t>(buffer_size_bytes));
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}
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if (m_pulseaudio_simple != nullptr) {
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memset(buffer, 0, buffer_size_bytes);
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int32_t error_code;
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auto return_code = pa_simple_read(m_pulseaudio_simple, buffer,
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buffer_size_bytes, &error_code);
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if (return_code < 0) {
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WARN("Could not finish reading pulse Audio stream buffer\n bytes read: %d buffer\n size: %d", return_code,
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buffer_size_bytes)
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// zero out buffer
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memset(buffer, 0, buffer_size_bytes);
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pa_simple_free(m_pulseaudio_simple);
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m_pulseaudio_simple = nullptr;
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return false;
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}
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// Success fully read entire buffer
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return true;
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}
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return false;
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}
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void AudioGrabber::populate_default_source_name() {
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pa_mainloop_api *mainloop_api;
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pa_context *pulseaudio_context;
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m_pulseaudio_mainloop = pa_mainloop_new();
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mainloop_api = pa_mainloop_get_api(m_pulseaudio_mainloop);
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pulseaudio_context = pa_context_new(mainloop_api, "VulcanoLE device list");
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pa_context_connect(pulseaudio_context, nullptr, PA_CONTEXT_NOFLAGS,
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nullptr);
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pa_context_set_state_callback(pulseaudio_context,
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pulseaudio_context_state_callback,
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reinterpret_cast<void *>(this));
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int ret;
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if (pa_mainloop_run(m_pulseaudio_mainloop, &ret) < 0) {
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ERR("Could not open pulseaudio mainloop to find default device name: %d", ret)
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}
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}
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bool AudioGrabber::open_pulseaudio_source(uint32_t max_buffer_size) {
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int32_t error_code = 0;
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static const pa_sample_spec sample_spec = { PA_SAMPLE_FLOAT32NE, k_sample_rate,
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k_channels };
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static const pa_buffer_attr buffer_attr = { max_buffer_size, 0, 0, 0,
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(max_buffer_size / 2) };
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populate_default_source_name();
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if (!m_pulseaudio_default_source_name.empty()) {
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m_pulseaudio_simple =
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pa_simple_new(nullptr, k_record_stream_name, PA_STREAM_RECORD,
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m_pulseaudio_default_source_name.c_str(),
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k_record_stream_description, &sample_spec,
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nullptr, &buffer_attr, &error_code);
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}
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if (m_pulseaudio_simple == nullptr) {
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m_pulseaudio_simple =
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pa_simple_new(nullptr, k_record_stream_name, PA_STREAM_RECORD,
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nullptr, k_record_stream_description,
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&sample_spec, nullptr, &buffer_attr, &error_code);
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}
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if (m_pulseaudio_simple == nullptr) {
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m_pulseaudio_simple =
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pa_simple_new(nullptr, k_record_stream_name, PA_STREAM_RECORD,
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"0", k_record_stream_description, &sample_spec,
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nullptr, &buffer_attr, &error_code);
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}
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if (m_pulseaudio_simple != nullptr) {
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return true;
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}
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ERR("Could not open pulseaudio source: %s", pa_strerror(error_code))
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return false;
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}
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void AudioGrabber::pulseaudio_context_state_callback(pa_context *c, void *userdata) {
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switch (pa_context_get_state(c)) {
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case PA_CONTEXT_UNCONNECTED:
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case PA_CONTEXT_CONNECTING:
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case PA_CONTEXT_AUTHORIZING:
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case PA_CONTEXT_SETTING_NAME:
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break;
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case PA_CONTEXT_READY: {
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pa_operation_unref(pa_context_get_server_info(
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c, pulseaudio_server_info_callback, userdata));
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break;
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}
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case PA_CONTEXT_FAILED:
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case PA_CONTEXT_TERMINATED:
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auto *src =
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reinterpret_cast<AudioGrabber *>(userdata);
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pa_mainloop_quit(src->m_pulseaudio_mainloop, 0);
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break;
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}
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}
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void AudioGrabber::pulseaudio_server_info_callback(pa_context *context, const pa_server_info *i, void *userdata) {
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if (i != nullptr) {
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auto *src = reinterpret_cast<AudioGrabber *>(userdata);
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std::string name = i->default_sink_name;
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name.append(k_default_monitor_postfix);
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src->m_pulseaudio_default_source_name = name;
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// stop mainloop after finding default name
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pa_mainloop_quit(src->m_pulseaudio_mainloop, 0);
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}
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}
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AudioGrabber *AudioGrabber::createAudioGrabber() {
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auto *grabber = new AudioGrabber();
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return grabber;
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}
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void AudioGrabber::init() {
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m_pcm_buffer = static_cast<pcm_stereo_sample *>(calloc(BUFFER_SIZE, sizeof(pcm_stereo_sample)));
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if (env != nullptr)
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m_scale = env->getAsDouble("audio_scale", 1.0);
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DBG("SET Audio Scale: %.3f", m_scale)
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loudness = 0.0;
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}
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void AudioGrabber::calculateRMS(pcm_stereo_sample *pFrame) {
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float square = 0, mean;
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for (int i = 0; i < BUFFER_SIZE; i++) {
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float left = pFrame[0].l;
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square += std::pow(left, 2);
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}
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mean = (square / (float) (BUFFER_SIZE));
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loudness = std::sqrt(mean);
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}
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void AudioGrabber::calculatePEAK(pcm_stereo_sample *pFrame) {
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float max = 0;
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for (int i = 0; i < BUFFER_SIZE; i++) {
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float left = std::abs(pFrame[0].l);
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if (left > max) {
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max = left;
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}
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}
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loudness = max;
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}
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float AudioGrabber::getLoudness() {
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std::unique_lock<std::mutex> lck(m_mtx);
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return (float) loudness;
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}
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bool AudioGrabber::doWork() {
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std::unique_lock<std::mutex> lck(m_mtx);
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if (this->read(m_pcm_buffer, BUFFER_SIZE)) {
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for (int i = 0; i < BUFFER_SIZE; ++i) {
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// my system is fucking quite
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m_pcm_buffer[i].l *= m_scale;
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m_pcm_buffer[i].r *= m_scale;
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}
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switch (requestMode) {
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case ReqMode::FFT:
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fft.process(m_pcm_buffer);
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break;
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case ReqMode::RMS:
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calculateRMS(m_pcm_buffer);
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break;
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case ReqMode::PEAK:
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calculatePEAK(m_pcm_buffer);
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break;
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default:
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fft.process(m_pcm_buffer);
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calculateRMS(m_pcm_buffer);
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calculatePEAK(m_pcm_buffer);
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}
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return true;
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} else {
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DBG("Wait for Data")
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return false;
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}
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}
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