mirror of
https://github.com/WinampDesktop/winamp.git
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289 lines
9.8 KiB
C++
289 lines
9.8 KiB
C++
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/*
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* openmpt123_portaudio.hpp
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* ------------------------
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* Purpose: libopenmpt command line player
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* Notes : (currently none)
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* Authors: OpenMPT Devs
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* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
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*/
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#ifndef OPENMPT123_PORTAUDIO_HPP
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#define OPENMPT123_PORTAUDIO_HPP
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#include "openmpt123_config.hpp"
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#include "openmpt123.hpp"
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#if defined(MPT_WITH_PORTAUDIO)
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#include <portaudio.h>
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namespace openmpt123 {
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struct portaudio_exception : public exception {
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portaudio_exception( PaError code ) : exception( Pa_GetErrorText( code ) ) { }
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};
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typedef void (*PaUtilLogCallback ) (const char *log);
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#ifdef _MSC_VER
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extern "C" void PaUtil_SetDebugPrintFunction(PaUtilLogCallback cb);
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#endif
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class portaudio_raii {
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private:
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std::ostream & log;
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bool log_set;
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bool portaudio_initialized;
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static std::ostream * portaudio_log_stream;
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private:
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static void portaudio_log_function( const char * log ) {
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if ( portaudio_log_stream ) {
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*portaudio_log_stream << "PortAudio: " << log;
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}
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}
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protected:
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void check_portaudio_error( PaError e ) {
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if ( e > 0 ) {
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return;
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}
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if ( e == paNoError ) {
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return;
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}
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if ( e == paOutputUnderflowed ) {
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log << "PortAudio warning: " << Pa_GetErrorText( e ) << std::endl;
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return;
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}
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throw portaudio_exception( e );
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}
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public:
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portaudio_raii( bool verbose, std::ostream & log ) : log(log), log_set(false), portaudio_initialized(false) {
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if ( verbose ) {
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portaudio_log_stream = &log;
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} else {
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portaudio_log_stream = 0;
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}
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#ifdef _MSC_VER
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PaUtil_SetDebugPrintFunction( portaudio_log_function );
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log_set = true;
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#endif
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check_portaudio_error( Pa_Initialize() );
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portaudio_initialized = true;
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if ( verbose ) {
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*portaudio_log_stream << std::endl;
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}
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}
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~portaudio_raii() {
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if ( portaudio_initialized ) {
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check_portaudio_error( Pa_Terminate() );
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portaudio_initialized = false;
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}
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if ( log_set ) {
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#ifdef _MSC_VER
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PaUtil_SetDebugPrintFunction( NULL );
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log_set = false;
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#endif
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}
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portaudio_log_stream = 0;
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}
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};
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std::ostream * portaudio_raii::portaudio_log_stream = 0;
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class portaudio_stream_blocking_raii : public portaudio_raii, public write_buffers_interface {
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private:
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PaStream * stream;
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bool interleaved;
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std::size_t channels;
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std::vector<float> sampleBufFloat;
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std::vector<std::int16_t> sampleBufInt;
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public:
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portaudio_stream_blocking_raii( commandlineflags & flags, std::ostream & log )
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: portaudio_raii(flags.verbose, log)
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, stream(NULL)
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, interleaved(false)
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, channels(flags.channels)
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{
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PaStreamParameters streamparameters;
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std::memset( &streamparameters, 0, sizeof(PaStreamParameters) );
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std::istringstream device_string( flags.device );
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int device = -1;
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device_string >> device;
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streamparameters.device = ( device == -1 ) ? Pa_GetDefaultOutputDevice() : device;
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streamparameters.channelCount = flags.channels;
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streamparameters.sampleFormat = ( flags.use_float ? paFloat32 : paInt16 ) | paNonInterleaved;
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if ( flags.buffer == default_high ) {
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streamparameters.suggestedLatency = Pa_GetDeviceInfo( streamparameters.device )->defaultHighOutputLatency;
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flags.buffer = static_cast<std::int32_t>( Pa_GetDeviceInfo( streamparameters.device )->defaultHighOutputLatency * 1000.0 );
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} else if ( flags.buffer == default_low ) {
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streamparameters.suggestedLatency = Pa_GetDeviceInfo( streamparameters.device )->defaultLowOutputLatency;
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flags.buffer = static_cast<std::int32_t>( Pa_GetDeviceInfo( streamparameters.device )->defaultLowOutputLatency * 1000.0 );
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} else {
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streamparameters.suggestedLatency = flags.buffer * 0.001;
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}
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unsigned long framesperbuffer = 0;
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if ( flags.mode != Mode::UI ) {
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framesperbuffer = paFramesPerBufferUnspecified;
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flags.period = 50;
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flags.period = std::min( flags.period, flags.buffer / 3 );
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} else if ( flags.period == default_high ) {
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framesperbuffer = paFramesPerBufferUnspecified;
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flags.period = 50;
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flags.period = std::min( flags.period, flags.buffer / 3 );
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} else if ( flags.period == default_low ) {
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framesperbuffer = paFramesPerBufferUnspecified;
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flags.period = 10;
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flags.period = std::min( flags.period, flags.buffer / 3 );
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} else {
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framesperbuffer = flags.period * flags.samplerate / 1000;
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}
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if ( flags.period <= 0 ) {
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flags.period = 1;
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}
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flags.apply_default_buffer_sizes();
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if ( flags.verbose ) {
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log << "PortAudio:" << std::endl;
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log << " device: "
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<< streamparameters.device
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<< " [ " << Pa_GetHostApiInfo( Pa_GetDeviceInfo( streamparameters.device )->hostApi )->name << " / " << Pa_GetDeviceInfo( streamparameters.device )->name << " ] "
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<< std::endl;
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log << " low latency: " << Pa_GetDeviceInfo( streamparameters.device )->defaultLowOutputLatency << std::endl;
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log << " high latency: " << Pa_GetDeviceInfo( streamparameters.device )->defaultHighOutputLatency << std::endl;
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log << " suggested latency: " << streamparameters.suggestedLatency << std::endl;
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log << " frames per buffer: " << framesperbuffer << std::endl;
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log << " ui redraw: " << flags.period << std::endl;
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}
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PaError e = PaError();
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e = Pa_OpenStream( &stream, NULL, &streamparameters, flags.samplerate, framesperbuffer, ( flags.dither > 0 ) ? paNoFlag : paDitherOff, NULL, NULL );
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if ( e != paNoError ) {
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// Non-interleaved failed, try interleaved next.
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// This might help broken portaudio on MacOS X.
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streamparameters.sampleFormat &= ~paNonInterleaved;
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e = Pa_OpenStream( &stream, NULL, &streamparameters, flags.samplerate, framesperbuffer, ( flags.dither > 0 ) ? paNoFlag : paDitherOff, NULL, NULL );
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if ( e == paNoError ) {
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interleaved = true;
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}
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check_portaudio_error( e );
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}
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check_portaudio_error( Pa_StartStream( stream ) );
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if ( flags.verbose ) {
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log << " channels: " << streamparameters.channelCount << std::endl;
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log << " sampleformat: " << ( ( ( streamparameters.sampleFormat & ~paNonInterleaved ) == paFloat32 ) ? "paFloat32" : "paInt16" ) << std::endl;
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log << " latency: " << Pa_GetStreamInfo( stream )->outputLatency << std::endl;
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log << " samplerate: " << Pa_GetStreamInfo( stream )->sampleRate << std::endl;
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log << std::endl;
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}
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}
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~portaudio_stream_blocking_raii() {
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if ( stream ) {
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PaError stopped = Pa_IsStreamStopped( stream );
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check_portaudio_error( stopped );
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if ( !stopped ) {
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check_portaudio_error( Pa_StopStream( stream ) );
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}
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check_portaudio_error( Pa_CloseStream( stream ) );
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stream = NULL;
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}
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}
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private:
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template<typename Tsample>
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void write_frames( const Tsample * buffer, std::size_t frames ) {
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while ( frames > 0 ) {
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unsigned long chunk_frames = static_cast<unsigned long>( std::min( static_cast<std::uint64_t>( frames ), static_cast<std::uint64_t>( std::numeric_limits<unsigned long>::max() ) ) );
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check_portaudio_error( Pa_WriteStream( stream, buffer, chunk_frames ) );
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buffer += chunk_frames * channels;
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frames -= chunk_frames;
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}
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}
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template<typename Tsample>
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void write_frames( std::vector<Tsample*> buffers, std::size_t frames ) {
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while ( frames > 0 ) {
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unsigned long chunk_frames = static_cast<unsigned long>( std::min( static_cast<std::uint64_t>( frames ), static_cast<std::uint64_t>( std::numeric_limits<unsigned long>::max() ) ) );
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check_portaudio_error( Pa_WriteStream( stream, buffers.data(), chunk_frames ) );
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for ( std::size_t channel = 0; channel < channels; ++channel ) {
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buffers[channel] += chunk_frames;
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}
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frames -= chunk_frames;
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}
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}
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public:
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void write( const std::vector<float*> buffers, std::size_t frames ) override {
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if ( interleaved ) {
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sampleBufFloat.clear();
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for ( std::size_t frame = 0; frame < frames; ++frame ) {
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for ( std::size_t channel = 0; channel < channels; ++channel ) {
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sampleBufFloat.push_back( buffers[channel][frame] );
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}
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}
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write_frames( sampleBufFloat.data(), frames );
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} else {
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write_frames( buffers, frames );
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}
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}
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void write( const std::vector<std::int16_t*> buffers, std::size_t frames ) override {
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if ( interleaved ) {
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sampleBufInt.clear();
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for ( std::size_t frame = 0; frame < frames; ++frame ) {
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for ( std::size_t channel = 0; channel < channels; ++channel ) {
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sampleBufInt.push_back( buffers[channel][frame] );
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}
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}
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write_frames( sampleBufInt.data(), frames );
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} else {
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write_frames( buffers, frames );
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}
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}
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bool unpause() override {
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check_portaudio_error( Pa_StartStream( stream ) );
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return true;
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}
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bool pause() override {
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check_portaudio_error( Pa_StopStream( stream ) );
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return true;
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}
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bool sleep( int ms ) override {
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Pa_Sleep( ms );
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return true;
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}
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};
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#define portaudio_stream_raii portaudio_stream_blocking_raii
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static std::string show_portaudio_devices( std::ostream & log ) {
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std::ostringstream devices;
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devices << " portaudio:" << std::endl;
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portaudio_raii portaudio( false, log );
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for ( PaDeviceIndex i = 0; i < Pa_GetDeviceCount(); ++i ) {
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if ( Pa_GetDeviceInfo( i ) && Pa_GetDeviceInfo( i )->maxOutputChannels > 0 ) {
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devices << " " << i << ": ";
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if ( Pa_GetHostApiInfo( Pa_GetDeviceInfo( i )->hostApi ) && Pa_GetHostApiInfo( Pa_GetDeviceInfo( i )->hostApi )->name ) {
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devices << Pa_GetHostApiInfo( Pa_GetDeviceInfo( i )->hostApi )->name;
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} else {
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devices << "Host API " << Pa_GetDeviceInfo( i )->hostApi;
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}
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if ( Pa_GetHostApiInfo( Pa_GetDeviceInfo( i )->hostApi ) ) {
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if ( i == Pa_GetHostApiInfo( Pa_GetDeviceInfo( i )->hostApi )->defaultOutputDevice ) {
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devices << " (default)";
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}
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}
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devices << " - ";
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if ( Pa_GetDeviceInfo( i )->name ) {
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devices << Pa_GetDeviceInfo( i )->name;
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} else {
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devices << "Device " << i;
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}
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devices << " (";
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devices << "high latency: " << Pa_GetDeviceInfo( i )->defaultHighOutputLatency;
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devices << ", ";
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devices << "low latency: " << Pa_GetDeviceInfo( i )->defaultLowOutputLatency;
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devices << ")";
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devices << std::endl;
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}
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}
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return devices.str();
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}
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} // namespace openmpt123
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#endif // MPT_WITH_PORTAUDIO
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#endif // OPENMPT123_PORTAUDIO_HPP
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