mirror of https://github.com/AxioDL/boo.git
574 lines
18 KiB
C++
574 lines
18 KiB
C++
#include <memory>
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#include <list>
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#include <thread>
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#include "AudioVoiceEngine.hpp"
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#include "logvisor/logvisor.hpp"
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#include <alsa/asoundlib.h>
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#include <signal.h>
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static inline double TimespecToDouble(struct timespec& ts)
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{
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return ts.tv_sec + ts.tv_nsec / 1.0e9;
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}
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namespace boo
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{
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static logvisor::Module Log("boo::ALSA");
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static const uint64_t StereoChans = (1 << SND_CHMAP_FL) |
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(1 << SND_CHMAP_FR);
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static const uint64_t QuadChans = (1 << SND_CHMAP_FL) |
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(1 << SND_CHMAP_FR) |
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(1 << SND_CHMAP_RL) |
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(1 << SND_CHMAP_RR);
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static const uint64_t S51Chans = (1 << SND_CHMAP_FL) |
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(1 << SND_CHMAP_FR) |
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(1 << SND_CHMAP_RL) |
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(1 << SND_CHMAP_RR) |
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(1 << SND_CHMAP_FC) |
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(1 << SND_CHMAP_LFE);
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static const uint64_t S71Chans = (1 << SND_CHMAP_FL) |
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(1 << SND_CHMAP_FR) |
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(1 << SND_CHMAP_RL) |
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(1 << SND_CHMAP_RR) |
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(1 << SND_CHMAP_FC) |
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(1 << SND_CHMAP_LFE) |
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(1 << SND_CHMAP_SL) |
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(1 << SND_CHMAP_SR);
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struct ALSAAudioVoiceEngine : BaseAudioVoiceEngine
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{
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snd_pcm_t* m_pcm;
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snd_pcm_uframes_t m_bufSize;
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snd_pcm_uframes_t m_periodSize;
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std::vector<int16_t> m_final16;
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std::vector<int32_t> m_final32;
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std::vector<float> m_finalFlt;
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~ALSAAudioVoiceEngine()
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{
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snd_pcm_drain(m_pcm);
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snd_pcm_close(m_pcm);
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}
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AudioChannelSet _getAvailableSet()
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{
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snd_pcm_chmap_query_t** chmaps = snd_pcm_query_chmaps(m_pcm);
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if (!chmaps)
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return AudioChannelSet::Stereo;
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static const std::array<AudioChannelSet, 4> testSets =
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{{AudioChannelSet::Surround71, AudioChannelSet::Surround51,
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AudioChannelSet::Quad, AudioChannelSet::Stereo}};
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for (AudioChannelSet set : testSets)
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{
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for (snd_pcm_chmap_query_t** chmap = chmaps ; *chmap != nullptr ; ++chmap)
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{
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snd_pcm_chmap_t* chm = &(*chmap)->map;
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uint64_t chBits = 0;
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for (unsigned c=0 ; c<chm->channels ; ++c)
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chBits |= 1 << chm->pos[c];
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switch (set)
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{
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case AudioChannelSet::Stereo:
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{
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if ((chBits & StereoChans) == StereoChans)
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{
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snd_pcm_free_chmaps(chmaps);
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return AudioChannelSet::Stereo;
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}
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break;
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}
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case AudioChannelSet::Quad:
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{
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if ((chBits & QuadChans) == QuadChans)
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{
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snd_pcm_free_chmaps(chmaps);
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return AudioChannelSet::Quad;
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}
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break;
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}
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case AudioChannelSet::Surround51:
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{
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if ((chBits & S51Chans) == S51Chans)
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{
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snd_pcm_free_chmaps(chmaps);
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return AudioChannelSet::Surround51;
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}
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break;
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}
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case AudioChannelSet::Surround71:
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{
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if ((chBits & S71Chans) == S71Chans)
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{
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snd_pcm_free_chmaps(chmaps);
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return AudioChannelSet::Surround71;
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}
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break;
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}
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default: break;
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}
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}
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}
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snd_pcm_free_chmaps(chmaps);
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return AudioChannelSet::Unknown;
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}
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ALSAAudioVoiceEngine()
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{
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if (snd_pcm_open(&m_pcm, "default", SND_PCM_STREAM_PLAYBACK, 0) < 0)
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{
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Log.report(logvisor::Error, "unable to allocate ALSA voice");
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return;
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}
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/* Query audio card for best supported format amd sample-rate */
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snd_pcm_hw_params_t* hwParams;
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snd_pcm_hw_params_malloc(&hwParams);
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snd_pcm_hw_params_any(m_pcm, hwParams);
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snd_pcm_format_t bestFmt;
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if (!snd_pcm_hw_params_test_format(m_pcm, hwParams, SND_PCM_FORMAT_FLOAT))
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{
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bestFmt = SND_PCM_FORMAT_FLOAT;
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m_mixInfo.m_sampleFormat = SOXR_FLOAT32_I;
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m_mixInfo.m_bitsPerSample = 32;
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}
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else if (!snd_pcm_hw_params_test_format(m_pcm, hwParams, SND_PCM_FORMAT_S32))
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{
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bestFmt = SND_PCM_FORMAT_S32;
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m_mixInfo.m_sampleFormat = SOXR_INT32_I;
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m_mixInfo.m_bitsPerSample = 32;
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}
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else if (!snd_pcm_hw_params_test_format(m_pcm, hwParams, SND_PCM_FORMAT_S16))
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{
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bestFmt = SND_PCM_FORMAT_S16;
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m_mixInfo.m_sampleFormat = SOXR_INT16_I;
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m_mixInfo.m_bitsPerSample = 16;
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}
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else
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{
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snd_pcm_close(m_pcm);
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m_pcm = nullptr;
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Log.report(logvisor::Fatal, "unsupported audio formats on default ALSA device");
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return;
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}
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unsigned int bestRate;
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if (!snd_pcm_hw_params_test_rate(m_pcm, hwParams, 96000, 0))
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{
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bestRate = 96000;
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m_mixInfo.m_sampleRate = 96000.0;
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m_5msFrames = 96000 * 5 / 1000;
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}
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else if (!snd_pcm_hw_params_test_rate(m_pcm, hwParams, 48000, 0))
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{
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bestRate = 48000;
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m_mixInfo.m_sampleRate = 48000.0;
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m_5msFrames = 48000 * 5 / 1000;
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}
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else
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{
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snd_pcm_close(m_pcm);
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m_pcm = nullptr;
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Log.report(logvisor::Fatal, "unsupported audio sample rates on default ALSA device");
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return;
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}
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snd_pcm_hw_params_free(hwParams);
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/* Query audio card for channel map */
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m_mixInfo.m_channels = _getAvailableSet();
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/* Populate channel map */
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unsigned chCount = ChannelCount(m_mixInfo.m_channels);
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int err;
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while ((err = snd_pcm_set_params(m_pcm, bestFmt, SND_PCM_ACCESS_RW_INTERLEAVED,
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chCount, bestRate, 0, 100000)) < 0)
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{
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if (m_mixInfo.m_channels == AudioChannelSet::Stereo)
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break;
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m_mixInfo.m_channels = AudioChannelSet(int(m_mixInfo.m_channels) - 1);
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chCount = ChannelCount(m_mixInfo.m_channels);
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}
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if (err < 0)
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{
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snd_pcm_close(m_pcm);
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m_pcm = nullptr;
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Log.report(logvisor::Error, "unable to set ALSA voice params");
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return;
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}
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snd_pcm_chmap_query_t** chmaps = snd_pcm_query_chmaps(m_pcm);
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ChannelMap& chmapOut = m_mixInfo.m_channelMap;
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if (chmaps)
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{
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snd_pcm_chmap_t* foundChmap = nullptr;
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for (snd_pcm_chmap_query_t** chmap = chmaps ; *chmap != nullptr ; ++chmap)
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{
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if ((*chmap)->map.channels == chCount)
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{
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snd_pcm_chmap_t* chm = &(*chmap)->map;
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uint64_t chBits = 0;
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for (unsigned c=0 ; c<chm->channels ; ++c)
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chBits |= 1 << chm->pos[c];
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bool good = false;
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switch (m_mixInfo.m_channels)
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{
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case AudioChannelSet::Stereo:
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if ((chBits & StereoChans) == StereoChans)
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good = true;
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break;
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case AudioChannelSet::Quad:
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if ((chBits & QuadChans) == QuadChans)
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good = true;
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break;
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case AudioChannelSet::Surround51:
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if ((chBits & S51Chans) == S51Chans)
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good = true;
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break;
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case AudioChannelSet::Surround71:
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if ((chBits & S71Chans) == S71Chans)
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good = true;
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break;
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default: break;
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}
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if (good)
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{
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foundChmap = chm;
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break;
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}
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}
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}
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if (!foundChmap)
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{
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snd_pcm_close(m_pcm);
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m_pcm = nullptr;
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snd_pcm_free_chmaps(chmaps);
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Log.report(logvisor::Error, "unable to find matching ALSA voice chmap");
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return;
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}
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chmapOut.m_channelCount = chCount;
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for (unsigned c=0 ; c<foundChmap->channels ; ++c)
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chmapOut.m_channels[c] = AudioChannel(foundChmap->pos[c] - 3);
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snd_pcm_set_chmap(m_pcm, foundChmap);
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snd_pcm_free_chmaps(chmaps);
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}
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else
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{
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chmapOut.m_channelCount = 2;
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chmapOut.m_channels[0] = AudioChannel::FrontLeft;
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chmapOut.m_channels[1] = AudioChannel::FrontRight;
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}
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snd_pcm_get_params(m_pcm, &m_bufSize, &m_periodSize);
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snd_pcm_prepare(m_pcm);
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m_mixInfo.m_periodFrames = m_periodSize;
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/* Allocate master mix space */
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switch (m_mixInfo.m_sampleFormat)
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{
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case SOXR_INT16_I:
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m_final16.resize(m_periodSize * m_mixInfo.m_channelMap.m_channelCount);
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break;
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case SOXR_INT32_I:
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m_final32.resize(m_periodSize * m_mixInfo.m_channelMap.m_channelCount);
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break;
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case SOXR_FLOAT32_I:
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m_finalFlt.resize(m_periodSize * m_mixInfo.m_channelMap.m_channelCount);
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break;
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default:
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break;
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}
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}
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void pumpAndMixVoices()
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{
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snd_pcm_sframes_t frames = snd_pcm_avail_update(m_pcm);
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if (frames < 0)
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{
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snd_pcm_state_t st = snd_pcm_state(m_pcm);
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if (st == SND_PCM_STATE_XRUN)
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{
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snd_pcm_prepare(m_pcm);
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frames = snd_pcm_avail_update(m_pcm);
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Log.report(logvisor::Warning, "ALSA underrun %ld frames", frames);
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}
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else
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return;
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}
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if (frames < 0)
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return;
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snd_pcm_sframes_t buffers = frames / m_periodSize;
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for (snd_pcm_sframes_t b=0 ; b<buffers ; ++b)
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{
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switch (m_mixInfo.m_sampleFormat)
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{
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case SOXR_INT16_I:
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_pumpAndMixVoices(m_periodSize, m_final16.data());
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snd_pcm_writei(m_pcm, m_final16.data(), m_periodSize);
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break;
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case SOXR_INT32_I:
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_pumpAndMixVoices(m_periodSize, m_final32.data());
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snd_pcm_writei(m_pcm, m_final32.data(), m_periodSize);
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break;
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case SOXR_FLOAT32_I:
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_pumpAndMixVoices(m_periodSize, m_finalFlt.data());
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snd_pcm_writei(m_pcm, m_finalFlt.data(), m_periodSize);
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break;
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default:
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break;
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}
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}
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}
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std::vector<std::pair<std::string, std::string>> enumerateMIDIDevices() const
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{
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std::vector<std::pair<std::string, std::string>> ret;
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int status;
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int card = -1; /* use -1 to prime the pump of iterating through card list */
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if ((status = snd_card_next(&card)) < 0)
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return {};
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if (card < 0)
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return {};
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while (card >= 0)
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{
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snd_ctl_t *ctl;
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char name[32];
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int device = -1;
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int status;
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sprintf(name, "hw:%d", card);
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if ((status = snd_ctl_open(&ctl, name, 0)) < 0)
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continue;
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do {
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status = snd_ctl_rawmidi_next_device(ctl, &device);
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if (status < 0)
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break;
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if (device >= 0)
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{
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snd_rawmidi_info_t *info;
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snd_rawmidi_info_alloca(&info);
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snd_rawmidi_info_set_device(info, device);
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sprintf(name + strlen(name), ",%d", device);
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ret.push_back(std::make_pair(name, snd_rawmidi_info_get_name(info)));
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}
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} while (device >= 0);
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snd_ctl_close(ctl);
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if ((status = snd_card_next(&card)) < 0)
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break;
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}
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return ret;
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}
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/* Empty handler for SIGQUIT */
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static void _sigquit(int) {}
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static void MIDIReceiveProc(snd_rawmidi_t* midi, const ReceiveFunctor& receiver, bool& running)
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{
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struct sigaction s;
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s.sa_handler = _sigquit;
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sigemptyset(&s.sa_mask);
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s.sa_flags = 0;
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sigaction(SIGQUIT, &s, nullptr);
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snd_rawmidi_status_t* midiStatus;
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snd_rawmidi_status_malloc(&midiStatus);
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uint8_t buf[512];
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while (running)
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{
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snd_htimestamp_t ts;
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snd_rawmidi_status(midi, midiStatus);
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snd_rawmidi_status_get_tstamp(midiStatus, &ts);
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int rdBytes = snd_rawmidi_read(midi, buf, 512);
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if (rdBytes < 0)
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{
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if (rdBytes != -EINTR)
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Log.report(logvisor::Error, "MIDI connection lost");
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running = false;
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break;
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}
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receiver(std::vector<uint8_t>(std::cbegin(buf), std::cbegin(buf) + rdBytes), TimespecToDouble(ts));
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}
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snd_rawmidi_status_free(midiStatus);
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}
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struct MIDIIn : public IMIDIIn
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{
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bool m_midiRunning = true;
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snd_rawmidi_t* m_midi;
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std::thread m_midiThread;
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MIDIIn(snd_rawmidi_t* midi, bool virt, ReceiveFunctor&& receiver)
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: IMIDIIn(virt, std::move(receiver)), m_midi(midi),
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m_midiThread(std::bind(MIDIReceiveProc, m_midi, m_receiver, m_midiRunning)) {}
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~MIDIIn()
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{
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m_midiRunning = false;
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pthread_kill(m_midiThread.native_handle(), SIGQUIT);
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if (m_midiThread.joinable())
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m_midiThread.join();
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snd_rawmidi_close(m_midi);
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}
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std::string description() const
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{
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snd_rawmidi_info_t* info;
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snd_rawmidi_info_alloca(&info);
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snd_rawmidi_info(m_midi, info);
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std::string ret = snd_rawmidi_info_get_name(info);
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return ret;
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}
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};
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struct MIDIOut : public IMIDIOut
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{
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snd_rawmidi_t* m_midi;
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MIDIOut(snd_rawmidi_t* midi, bool virt)
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: IMIDIOut(virt), m_midi(midi) {}
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~MIDIOut() {snd_rawmidi_close(m_midi);}
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std::string description() const
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{
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snd_rawmidi_info_t* info;
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snd_rawmidi_info_alloca(&info);
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snd_rawmidi_info(m_midi, info);
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std::string ret = snd_rawmidi_info_get_name(info);
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return ret;
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}
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size_t send(const void* buf, size_t len) const
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{
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return size_t(std::max(0l, snd_rawmidi_write(m_midi, buf, len)));
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}
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};
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struct MIDIInOut : public IMIDIInOut
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{
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bool m_midiRunning = true;
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snd_rawmidi_t* m_midiIn;
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snd_rawmidi_t* m_midiOut;
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std::thread m_midiThread;
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MIDIInOut(snd_rawmidi_t* midiIn, snd_rawmidi_t* midiOut, bool virt, ReceiveFunctor&& receiver)
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: IMIDIInOut(virt, std::move(receiver)), m_midiIn(midiIn), m_midiOut(midiOut),
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m_midiThread(std::bind(MIDIReceiveProc, m_midiIn, m_receiver, m_midiRunning)) {}
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~MIDIInOut()
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{
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m_midiRunning = false;
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pthread_kill(m_midiThread.native_handle(), SIGQUIT);
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if (m_midiThread.joinable())
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m_midiThread.join();
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snd_rawmidi_close(m_midiIn);
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snd_rawmidi_close(m_midiOut);
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}
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std::string description() const
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{
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snd_rawmidi_info_t* info;
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snd_rawmidi_info_alloca(&info);
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snd_rawmidi_info(m_midiIn, info);
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std::string ret = snd_rawmidi_info_get_name(info);
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return ret;
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}
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size_t send(const void* buf, size_t len) const
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{
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return size_t(std::max(0l, snd_rawmidi_write(m_midiOut, buf, len)));
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}
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};
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std::unique_ptr<IMIDIIn> newVirtualMIDIIn(ReceiveFunctor&& receiver)
|
|
{
|
|
int status;
|
|
snd_rawmidi_t* midi;
|
|
status = snd_rawmidi_open(&midi, nullptr, "virtual", 0);
|
|
if (status)
|
|
return {};
|
|
return std::make_unique<MIDIIn>(midi, true, std::move(receiver));
|
|
}
|
|
|
|
std::unique_ptr<IMIDIOut> newVirtualMIDIOut()
|
|
{
|
|
int status;
|
|
snd_rawmidi_t* midi;
|
|
status = snd_rawmidi_open(nullptr, &midi, "virtual", 0);
|
|
if (status)
|
|
return {};
|
|
return std::make_unique<MIDIOut>(midi, true);
|
|
}
|
|
|
|
std::unique_ptr<IMIDIInOut> newVirtualMIDIInOut(ReceiveFunctor&& receiver)
|
|
{
|
|
int status;
|
|
snd_rawmidi_t* midiIn;
|
|
snd_rawmidi_t* midiOut;
|
|
status = snd_rawmidi_open(&midiIn, &midiOut, "virtual", 0);
|
|
if (status)
|
|
return {};
|
|
return std::make_unique<MIDIInOut>(midiIn, midiOut, true, std::move(receiver));
|
|
}
|
|
|
|
std::unique_ptr<IMIDIIn> newRealMIDIIn(const char* name, ReceiveFunctor&& receiver)
|
|
{
|
|
snd_rawmidi_t* midi;
|
|
int status = snd_rawmidi_open(&midi, nullptr, name, 0);
|
|
if (status)
|
|
return {};
|
|
return std::make_unique<MIDIIn>(midi, true, std::move(receiver));
|
|
}
|
|
|
|
std::unique_ptr<IMIDIOut> newRealMIDIOut(const char* name)
|
|
{
|
|
snd_rawmidi_t* midi;
|
|
int status = snd_rawmidi_open(nullptr, &midi, name, 0);
|
|
if (status)
|
|
return {};
|
|
return std::make_unique<MIDIOut>(midi, true);
|
|
}
|
|
|
|
std::unique_ptr<IMIDIInOut> newRealMIDIInOut(const char* name, ReceiveFunctor&& receiver)
|
|
{
|
|
snd_rawmidi_t* midiIn;
|
|
snd_rawmidi_t* midiOut;
|
|
int status = snd_rawmidi_open(&midiIn, &midiOut, name, 0);
|
|
if (status)
|
|
return {};
|
|
return std::make_unique<MIDIInOut>(midiIn, midiOut, true, std::move(receiver));
|
|
}
|
|
|
|
bool useMIDILock() const {return true;}
|
|
};
|
|
|
|
std::unique_ptr<IAudioVoiceEngine> NewAudioVoiceEngine()
|
|
{
|
|
std::unique_ptr<IAudioVoiceEngine> ret = std::make_unique<ALSAAudioVoiceEngine>();
|
|
if (!static_cast<ALSAAudioVoiceEngine&>(*ret).m_pcm)
|
|
return {};
|
|
return ret;
|
|
}
|
|
|
|
}
|