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