mirror of
https://github.com/thinkonmay/sunshine-sdk.git
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526 lines
15 KiB
C++
526 lines
15 KiB
C++
/**
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* @file src/platform/linux/audio.cpp
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* @brief todo
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*/
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#include <bitset>
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#include <sstream>
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#include <boost/regex.hpp>
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#include <pulse/error.h>
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#include <pulse/pulseaudio.h>
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#include <pulse/simple.h>
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#include "src/platform/common.h"
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#include "src/config.h"
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#include "src/main.h"
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#include "src/thread_safe.h"
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namespace platf {
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using namespace std::literals;
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constexpr pa_channel_position_t position_mapping[] {
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PA_CHANNEL_POSITION_FRONT_LEFT,
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PA_CHANNEL_POSITION_FRONT_RIGHT,
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PA_CHANNEL_POSITION_FRONT_CENTER,
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PA_CHANNEL_POSITION_LFE,
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PA_CHANNEL_POSITION_REAR_LEFT,
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PA_CHANNEL_POSITION_REAR_RIGHT,
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PA_CHANNEL_POSITION_SIDE_LEFT,
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PA_CHANNEL_POSITION_SIDE_RIGHT,
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};
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std::string
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to_string(const char *name, const std::uint8_t *mapping, int channels) {
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std::stringstream ss;
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ss << "rate=48000 sink_name="sv << name << " format=s16le channels="sv << channels << " channel_map="sv;
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std::for_each_n(mapping, channels - 1, [&ss](std::uint8_t pos) {
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ss << pa_channel_position_to_string(position_mapping[pos]) << ',';
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});
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ss << pa_channel_position_to_string(position_mapping[mapping[channels - 1]]);
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ss << " sink_properties=device.description="sv << name;
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auto result = ss.str();
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BOOST_LOG(debug) << "null-sink args: "sv << result;
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return result;
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}
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struct mic_attr_t: public mic_t {
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util::safe_ptr<pa_simple, pa_simple_free> mic;
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capture_e
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sample(std::vector<std::int16_t> &sample_buf) override {
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auto sample_size = sample_buf.size();
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auto buf = sample_buf.data();
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int status;
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if (pa_simple_read(mic.get(), buf, sample_size * 2, &status)) {
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BOOST_LOG(error) << "pa_simple_read() failed: "sv << pa_strerror(status);
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return capture_e::error;
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}
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return capture_e::ok;
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}
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};
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std::unique_ptr<mic_t>
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microphone(const std::uint8_t *mapping, int channels, std::uint32_t sample_rate, std::uint32_t frame_size, std::string source_name) {
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auto mic = std::make_unique<mic_attr_t>();
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pa_sample_spec ss { PA_SAMPLE_S16LE, sample_rate, (std::uint8_t) channels };
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pa_channel_map pa_map;
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pa_map.channels = channels;
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std::for_each_n(pa_map.map, pa_map.channels, [mapping](auto &channel) mutable {
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channel = position_mapping[*mapping++];
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});
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pa_buffer_attr pa_attr = {};
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pa_attr.maxlength = frame_size * 8;
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int status;
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mic->mic.reset(
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pa_simple_new(nullptr, "sunshine",
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pa_stream_direction_t::PA_STREAM_RECORD, source_name.c_str(),
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"sunshine-record", &ss, &pa_map, &pa_attr, &status));
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if (!mic->mic) {
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auto err_str = pa_strerror(status);
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BOOST_LOG(error) << "pa_simple_new() failed: "sv << err_str;
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return nullptr;
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}
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return mic;
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}
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namespace pa {
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template <bool B, class T>
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struct add_const_helper;
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template <class T>
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struct add_const_helper<true, T> {
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using type = const std::remove_pointer_t<T> *;
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};
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template <class T>
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struct add_const_helper<false, T> {
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using type = const T *;
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};
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template <class T>
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using add_const_t = typename add_const_helper<std::is_pointer_v<T>, T>::type;
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template <class T>
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void
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pa_free(T *p) {
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pa_xfree(p);
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}
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using ctx_t = util::safe_ptr<pa_context, pa_context_unref>;
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using loop_t = util::safe_ptr<pa_mainloop, pa_mainloop_free>;
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using op_t = util::safe_ptr<pa_operation, pa_operation_unref>;
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using string_t = util::safe_ptr<char, pa_free<char>>;
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template <class T>
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using cb_simple_t = std::function<void(ctx_t::pointer, add_const_t<T> i)>;
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template <class T>
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void
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cb(ctx_t::pointer ctx, add_const_t<T> i, void *userdata) {
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auto &f = *(cb_simple_t<T> *) userdata;
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// Cannot similarly filter on eol here. Unless reported otherwise assume
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// we have no need for special filtering like cb?
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f(ctx, i);
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}
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template <class T>
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using cb_t = std::function<void(ctx_t::pointer, add_const_t<T> i, int eol)>;
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template <class T>
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void
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cb(ctx_t::pointer ctx, add_const_t<T> i, int eol, void *userdata) {
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auto &f = *(cb_t<T> *) userdata;
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// For some reason, pulseaudio calls this callback after disconnecting
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if (i && eol) {
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return;
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}
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f(ctx, i, eol);
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}
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void
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cb_i(ctx_t::pointer ctx, std::uint32_t i, void *userdata) {
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auto alarm = (safe::alarm_raw_t<int> *) userdata;
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alarm->ring(i);
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}
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void
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ctx_state_cb(ctx_t::pointer ctx, void *userdata) {
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auto &f = *(std::function<void(ctx_t::pointer)> *) userdata;
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f(ctx);
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}
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void
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success_cb(ctx_t::pointer ctx, int status, void *userdata) {
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assert(userdata != nullptr);
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auto alarm = (safe::alarm_raw_t<int> *) userdata;
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alarm->ring(status ? 0 : 1);
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}
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class server_t: public audio_control_t {
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enum ctx_event_e : int {
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ready,
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terminated,
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failed
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};
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public:
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loop_t loop;
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ctx_t ctx;
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std::string requested_sink;
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struct {
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std::uint32_t stereo = PA_INVALID_INDEX;
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std::uint32_t surround51 = PA_INVALID_INDEX;
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std::uint32_t surround71 = PA_INVALID_INDEX;
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} index;
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std::unique_ptr<safe::event_t<ctx_event_e>> events;
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std::unique_ptr<std::function<void(ctx_t::pointer)>> events_cb;
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std::thread worker;
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int
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init() {
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events = std::make_unique<safe::event_t<ctx_event_e>>();
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loop.reset(pa_mainloop_new());
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ctx.reset(pa_context_new(pa_mainloop_get_api(loop.get()), "sunshine"));
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events_cb = std::make_unique<std::function<void(ctx_t::pointer)>>([this](ctx_t::pointer ctx) {
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switch (pa_context_get_state(ctx)) {
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case PA_CONTEXT_READY:
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events->raise(ready);
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break;
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case PA_CONTEXT_TERMINATED:
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BOOST_LOG(debug) << "Pulseadio context terminated"sv;
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events->raise(terminated);
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break;
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case PA_CONTEXT_FAILED:
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BOOST_LOG(debug) << "Pulseadio context failed"sv;
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events->raise(failed);
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break;
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case PA_CONTEXT_CONNECTING:
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BOOST_LOG(debug) << "Connecting to pulseaudio"sv;
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case PA_CONTEXT_UNCONNECTED:
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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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}
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});
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pa_context_set_state_callback(ctx.get(), ctx_state_cb, events_cb.get());
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auto status = pa_context_connect(ctx.get(), nullptr, PA_CONTEXT_NOFLAGS, nullptr);
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if (status) {
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BOOST_LOG(error) << "Couldn't connect to pulseaudio: "sv << pa_strerror(status);
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return -1;
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}
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worker = std::thread {
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[](loop_t::pointer loop) {
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int retval;
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auto status = pa_mainloop_run(loop, &retval);
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if (status < 0) {
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BOOST_LOG(error) << "Couldn't run pulseaudio main loop"sv;
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return;
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}
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},
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loop.get()
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};
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auto event = events->pop();
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if (event == failed) {
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return -1;
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}
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return 0;
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}
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int
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load_null(const char *name, const std::uint8_t *channel_mapping, int channels) {
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auto alarm = safe::make_alarm<int>();
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op_t op {
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pa_context_load_module(
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ctx.get(),
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"module-null-sink",
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to_string(name, channel_mapping, channels).c_str(),
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cb_i,
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alarm.get()),
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};
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alarm->wait();
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return *alarm->status();
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}
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int
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unload_null(std::uint32_t i) {
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if (i == PA_INVALID_INDEX) {
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return 0;
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}
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auto alarm = safe::make_alarm<int>();
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op_t op {
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pa_context_unload_module(ctx.get(), i, success_cb, alarm.get())
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};
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alarm->wait();
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if (*alarm->status()) {
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BOOST_LOG(error) << "Couldn't unload null-sink with index ["sv << i << "]: "sv << pa_strerror(pa_context_errno(ctx.get()));
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return -1;
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}
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return 0;
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}
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std::optional<sink_t>
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sink_info() override {
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constexpr auto stereo = "sink-sunshine-stereo";
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constexpr auto surround51 = "sink-sunshine-surround51";
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constexpr auto surround71 = "sink-sunshine-surround71";
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auto alarm = safe::make_alarm<int>();
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sink_t sink;
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// Count of all virtual sinks that are created by us
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int nullcount = 0;
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cb_t<pa_sink_info *> f = [&](ctx_t::pointer ctx, const pa_sink_info *sink_info, int eol) {
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if (!sink_info) {
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if (!eol) {
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BOOST_LOG(error) << "Couldn't get pulseaudio sink info: "sv << pa_strerror(pa_context_errno(ctx));
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alarm->ring(-1);
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}
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alarm->ring(0);
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return;
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}
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// Ensure Sunshine won't create a sink that already exists.
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if (!std::strcmp(sink_info->name, stereo)) {
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index.stereo = sink_info->owner_module;
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++nullcount;
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}
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else if (!std::strcmp(sink_info->name, surround51)) {
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index.surround51 = sink_info->owner_module;
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++nullcount;
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}
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else if (!std::strcmp(sink_info->name, surround71)) {
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index.surround71 = sink_info->owner_module;
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++nullcount;
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}
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};
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op_t op { pa_context_get_sink_info_list(ctx.get(), cb<pa_sink_info *>, &f) };
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if (!op) {
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BOOST_LOG(error) << "Couldn't create card info operation: "sv << pa_strerror(pa_context_errno(ctx.get()));
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return std::nullopt;
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}
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alarm->wait();
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if (*alarm->status()) {
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return std::nullopt;
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}
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auto sink_name = get_default_sink_name();
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sink.host = sink_name;
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if (index.stereo == PA_INVALID_INDEX) {
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index.stereo = load_null(stereo, speaker::map_stereo, sizeof(speaker::map_stereo));
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if (index.stereo == PA_INVALID_INDEX) {
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BOOST_LOG(warning) << "Couldn't create virtual sink for stereo: "sv << pa_strerror(pa_context_errno(ctx.get()));
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}
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else {
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++nullcount;
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}
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}
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if (index.surround51 == PA_INVALID_INDEX) {
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index.surround51 = load_null(surround51, speaker::map_surround51, sizeof(speaker::map_surround51));
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if (index.surround51 == PA_INVALID_INDEX) {
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BOOST_LOG(warning) << "Couldn't create virtual sink for surround-51: "sv << pa_strerror(pa_context_errno(ctx.get()));
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}
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else {
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++nullcount;
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}
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}
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if (index.surround71 == PA_INVALID_INDEX) {
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index.surround71 = load_null(surround71, speaker::map_surround71, sizeof(speaker::map_surround71));
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if (index.surround71 == PA_INVALID_INDEX) {
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BOOST_LOG(warning) << "Couldn't create virtual sink for surround-71: "sv << pa_strerror(pa_context_errno(ctx.get()));
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}
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else {
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++nullcount;
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}
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}
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if (sink_name.empty()) {
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BOOST_LOG(warning) << "Couldn't find an active default sink. Continuing with virtual audio only."sv;
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}
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if (nullcount == 3) {
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sink.null = std::make_optional(sink_t::null_t { stereo, surround51, surround71 });
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}
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return std::make_optional(std::move(sink));
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}
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std::string
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get_default_sink_name() {
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std::string sink_name;
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auto alarm = safe::make_alarm<int>();
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cb_simple_t<pa_server_info *> server_f = [&](ctx_t::pointer ctx, const pa_server_info *server_info) {
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if (!server_info) {
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BOOST_LOG(error) << "Couldn't get pulseaudio server info: "sv << pa_strerror(pa_context_errno(ctx));
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alarm->ring(-1);
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}
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if (server_info->default_sink_name) {
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sink_name = server_info->default_sink_name;
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}
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alarm->ring(0);
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};
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op_t server_op { pa_context_get_server_info(ctx.get(), cb<pa_server_info *>, &server_f) };
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alarm->wait();
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// No need to check status. If it failed just return default name.
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return sink_name;
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}
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std::string
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get_monitor_name(const std::string &sink_name) {
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std::string monitor_name;
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auto alarm = safe::make_alarm<int>();
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if (sink_name.empty()) {
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return monitor_name;
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}
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cb_t<pa_sink_info *> sink_f = [&](ctx_t::pointer ctx, const pa_sink_info *sink_info, int eol) {
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if (!sink_info) {
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if (!eol) {
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BOOST_LOG(error) << "Couldn't get pulseaudio sink info for ["sv << sink_name
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<< "]: "sv << pa_strerror(pa_context_errno(ctx));
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alarm->ring(-1);
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}
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alarm->ring(0);
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return;
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}
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monitor_name = sink_info->monitor_source_name;
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};
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op_t sink_op { pa_context_get_sink_info_by_name(ctx.get(), sink_name.c_str(), cb<pa_sink_info *>, &sink_f) };
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alarm->wait();
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// No need to check status. If it failed just return default name.
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BOOST_LOG(info) << "Found default monitor by name: "sv << monitor_name;
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return monitor_name;
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}
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std::unique_ptr<mic_t>
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microphone(const std::uint8_t *mapping, int channels, std::uint32_t sample_rate, std::uint32_t frame_size) override {
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// Sink choice priority:
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// 1. Config sink
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// 2. Last sink swapped to (Usually virtual in this case)
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// 3. Default Sink
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// An attempt was made to always use default to match the switching mechanic,
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// but this happens right after the swap so the default returned by PA was not
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// the new one just set!
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auto sink_name = config::audio.sink;
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if (sink_name.empty()) sink_name = requested_sink;
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if (sink_name.empty()) sink_name = get_default_sink_name();
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return ::platf::microphone(mapping, channels, sample_rate, frame_size, get_monitor_name(sink_name));
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}
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int
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set_sink(const std::string &sink) override {
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auto alarm = safe::make_alarm<int>();
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BOOST_LOG(info) << "Setting default sink to: ["sv << sink << "]"sv;
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op_t op {
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pa_context_set_default_sink(
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ctx.get(), sink.c_str(), success_cb, alarm.get()),
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};
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if (!op) {
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BOOST_LOG(error) << "Couldn't create set default-sink operation: "sv << pa_strerror(pa_context_errno(ctx.get()));
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return -1;
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}
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alarm->wait();
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if (*alarm->status()) {
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BOOST_LOG(error) << "Couldn't set default-sink ["sv << sink << "]: "sv << pa_strerror(pa_context_errno(ctx.get()));
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return -1;
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}
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requested_sink = sink;
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return 0;
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}
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~server_t() override {
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unload_null(index.stereo);
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unload_null(index.surround51);
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unload_null(index.surround71);
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if (worker.joinable()) {
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pa_context_disconnect(ctx.get());
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KITTY_WHILE_LOOP(auto event = events->pop(), event != terminated && event != failed, {
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event = events->pop();
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})
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pa_mainloop_quit(loop.get(), 0);
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worker.join();
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}
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}
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};
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} // namespace pa
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std::unique_ptr<audio_control_t>
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audio_control() {
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auto audio = std::make_unique<pa::server_t>();
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|
|
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if (audio->init()) {
|
|
return nullptr;
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|
}
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|
|
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return audio;
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}
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} // namespace platf
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