Portaudio support for sound
This commit is contained in:
Ilari Liusvaara
parent
ea562b3aa3
commit
4b1815deb2
3 changed files with 219 additions and 0 deletions
5
Makefile
5
Makefile
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@ -60,12 +60,17 @@ endif
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ifeq ($(SOUND), SDL)
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PLATFORM_OBJECTS += SDL/sound-sdl.$(OBJECT_SUFFIX)
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else
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ifeq ($(SOUND), PORTAUDIO)
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PLATFORM_OBJECTS += portaudio/sound-portaudio.$(OBJECT_SUFFIX)
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PLATFORM_LDFLAGS += -lportaudio
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else
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ifeq ($(SOUND), DUMMY)
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PLATFORM_OBJECTS += dummy/sound-dummy.$(OBJECT_SUFFIX)
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else
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$(error "Unsupported sound type")
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endif
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endif
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endif
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ifeq ($(GRAPHICS), SDL)
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ifneq ($(JOYSTICK), SDL)
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1
SDL/joystick-sdl.cpp
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1
SDL/joystick-sdl.cpp
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@ -0,0 +1 @@
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//Empty
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213
portaudio/sound-portaudio.cpp
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213
portaudio/sound-portaudio.cpp
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@ -0,0 +1,213 @@
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#include "window.hpp"
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#include "render.hpp"
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#include <cstring>
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#include "command.hpp"
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#include "framerate.hpp"
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#include "misc.hpp"
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#include "lsnes.hpp"
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#include "settings.hpp"
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#include <vector>
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#include <iostream>
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#include <csignal>
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#include "keymapper.hpp"
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#include "framerate.hpp"
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#include <sstream>
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#include <fstream>
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#include <cassert>
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#define WATCHDOG_TIMEOUT 15
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#define MAXMESSAGES 6
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#define MSGHISTORY 1000
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#define MAXHISTORY 1000
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#include <portaudio.h>
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#include <string>
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#include <map>
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#include <stdexcept>
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namespace
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{
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uint32_t audio_playback_freq = 0;
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const size_t audiobuf_size = 8192;
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uint16_t audiobuf[audiobuf_size];
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volatile size_t audiobuf_get = 0;
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volatile size_t audiobuf_put = 0;
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uint64_t sampledup_ctr = 0;
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uint64_t sampledup_inc = 0;
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uint64_t sampledup_mod = 1;
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PaStream* s;
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void calculate_sampledup(uint32_t rate_n, uint32_t rate_d)
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{
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if(!audio_playback_freq) {
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//Sound disabled.
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sampledup_ctr = 0;
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sampledup_inc = 0;
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sampledup_mod = 0;
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} else {
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sampledup_ctr = 0;
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sampledup_inc = rate_n;
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sampledup_mod = rate_d * audio_playback_freq + rate_n;
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}
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}
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function_ptr_command<const std::string&> enable_sound("enable-sound", "Enable/Disable sound",
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"Syntax: enable-sound <on/off>\nEnable or disable sound.\n",
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[](const std::string& args) throw(std::bad_alloc, std::runtime_error) {
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std::string s = args;
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if(s == "on" || s == "true" || s == "1" || s == "enable" || s == "enabled")
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window::sound_enable(true);
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else if(s == "off" || s == "false" || s == "0" || s == "disable" || s == "disabled")
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window::sound_enable(false);
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else
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throw std::runtime_error("Bad sound setting");
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});
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int audiocb(const void *input, void *output, unsigned long frame_count,
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const PaStreamCallbackTimeInfo* time_info, PaStreamCallbackFlags flags, void* user)
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{
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static uint16_t lprev, rprev;
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int16_t* _output = reinterpret_cast<int16_t*>(output);
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for(unsigned long i = 0; i < frame_count; i++) {
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uint16_t l, r;
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if(audiobuf_get == audiobuf_put) {
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l = lprev;
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r = rprev;
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} else {
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l = lprev = audiobuf[audiobuf_get++];
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r = rprev = audiobuf[audiobuf_get++];
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if(audiobuf_get == audiobuf_size)
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audiobuf_get = 0;
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}
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*(_output++) = l - 32768;
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*(_output++) = r - 32768;
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}
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return 0;
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}
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double attempts[] = {44100, 48000, 32000, -1};
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}
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void window::sound_enable(bool enable) throw()
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{
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PaError err;
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if(enable)
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err = Pa_StartStream(s);
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else
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err = Pa_StopStream(s);
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if(err != paNoError)
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window::message(std::string("Portaudio error (start/stop): ") + Pa_GetErrorText(err));
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}
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void sound_init()
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{
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PaError err = Pa_Initialize();
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if(err != paNoError) {
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window::message(std::string("Portaudio error (init): ") + Pa_GetErrorText(err));
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window::message("Audio can't be initialized, audio playback disabled");
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//Disable audio.
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audio_playback_freq = 0;
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calculate_sampledup(32000, 1);
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return;
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}
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PaDeviceIndex device = 0;
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PaDeviceIndex forcedevice = static_cast<PaDeviceIndex>(-1);
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if(getenv("LSNES_FORCE_AUDIO_OUT")) {
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forcedevice = atoi(getenv("LSNES_FORCE_AUDIO_OUT"));
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std::ostringstream str;
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str << "Attempting to force sound output #" << forcedevice;
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window::message(str.str());
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device = forcedevice;
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}
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{
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std::ostringstream str;
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str << "Detected " << Pa_GetDeviceCount() << " sound output devices.";
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window::message(str.str());
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}
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for(PaDeviceIndex j = 0; j < Pa_GetDeviceCount(); j++) {
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const PaDeviceInfo* inf = Pa_GetDeviceInfo(j);
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window::message(std::string("Audio device: ") + inf->name);
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}
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unsigned i = 0;
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double freq = 0;
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while((freq = attempts[i]) > 0) {
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PaStreamParameters output;
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memset(&output, 0, sizeof(output));
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output.device = device;
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output.channelCount = 2;
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output.sampleFormat = paInt16;
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output.suggestedLatency = Pa_GetDeviceInfo(device)->defaultLowOutputLatency;
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output.hostApiSpecificStreamInfo = NULL;
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err = Pa_OpenStream(&s, NULL, &output, freq, 0, 0, audiocb, NULL);
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if(err == paNoError)
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break;
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{
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std::ostringstream str;
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str << "Portaudio: Can't open audio at " << freq << " using '"
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<< Pa_GetDeviceInfo(device)->name << "': " << Pa_GetErrorText(err) << std::endl;
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window::message(str.str());
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}
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i++;
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if(attempts[i] <= 0 && device < Pa_GetDeviceCount()) {
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i = 0;
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device++;
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if(forcedevice != static_cast<PaDeviceIndex>(-1))
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break;
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}
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if(device == Pa_GetDeviceCount())
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break;
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}
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//GO!!!
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if(freq <= 0) {
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window::message(std::string("Portaudio error (open): ") + Pa_GetErrorText(err));
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window::message("Audio can't be initialized, audio playback disabled");
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//Disable audio.
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audio_playback_freq = 0;
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calculate_sampledup(32000, 1);
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return;
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}
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{
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std::ostringstream str;
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str << "Portaudio: Opened audio at " << freq << " using '" << Pa_GetDeviceInfo(device)->name
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<< "'" << std::endl;
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window::message(str.str());
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}
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audio_playback_freq = freq;
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calculate_sampledup(32000, 1);
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err = Pa_StartStream(s);
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if(err != paNoError)
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window::message(std::string("Portaudio error (start): ") + Pa_GetErrorText(err));
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}
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void sound_quit()
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{
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PaError err = Pa_StopStream(s);
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if(err != paNoError)
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window::message(std::string("Portaudio error (stop): ") + Pa_GetErrorText(err));
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Pa_Terminate();
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}
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void window::play_audio_sample(uint16_t left, uint16_t right) throw()
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{
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sampledup_ctr += sampledup_inc;
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while(sampledup_ctr < sampledup_mod) {
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audiobuf[audiobuf_put++] = left;
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audiobuf[audiobuf_put++] = right;
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if(audiobuf_put == audiobuf_size)
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audiobuf_put = 0;
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sampledup_ctr += sampledup_inc;
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}
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sampledup_ctr -= sampledup_mod;
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}
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void window::set_sound_rate(uint32_t rate_n, uint32_t rate_d)
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{
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uint32_t g = gcd(rate_n, rate_d);
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calculate_sampledup(rate_n / g, rate_d / g);
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}
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const char* sound_plugin_name = "Portaudio sound plugin";
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