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/*
* openmpt123_waveout.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_WAVEOUT_HPP
#define OPENMPT123_WAVEOUT_HPP
#include "openmpt123_config.hpp"
#include "openmpt123.hpp"
#if defined(WIN32)
namespace openmpt123 {
struct waveout_exception : public exception {
waveout_exception() : exception( "waveout" ) { }
};
class waveout_stream_raii : public write_buffers_interface {
private:
HWAVEOUT waveout;
std::size_t num_channels;
std::size_t num_chunks;
std::size_t frames_per_chunk;
std::size_t bytes_per_chunk;
std::vector<WAVEHDR> waveheaders;
std::vector<std::vector<char> > wavebuffers;
std::deque<char> byte_queue;
public:
waveout_stream_raii( commandlineflags & flags )
: waveout(NULL)
, num_channels(0)
, num_chunks(0)
, frames_per_chunk(0)
, bytes_per_chunk(0)
{
if ( flags.buffer == default_high ) {
flags.buffer = 150;
} else if ( flags.buffer == default_low ) {
flags.buffer = 50;
}
if ( flags.period == default_high ) {
flags.period = 30;
} else if ( flags.period == default_low ) {
flags.period = 10;
}
flags.apply_default_buffer_sizes();
WAVEFORMATEX wfx;
ZeroMemory( &wfx, sizeof( wfx ) );
wfx.wFormatTag = flags.use_float ? WAVE_FORMAT_IEEE_FLOAT : WAVE_FORMAT_PCM;
wfx.nChannels = static_cast<WORD>( flags.channels );
wfx.nSamplesPerSec = flags.samplerate;
wfx.wBitsPerSample = flags.use_float ? 32 : 16;
wfx.nBlockAlign = ( wfx.wBitsPerSample / 8 ) * wfx.nChannels;
wfx.nAvgBytesPerSec = wfx.nSamplesPerSec * wfx.nBlockAlign;
wfx.cbSize = 0;
std::istringstream device_string( flags.device );
int device = -1;
device_string >> device;
waveOutOpen( &waveout, device == -1 ? WAVE_MAPPER : device, &wfx, 0, 0, CALLBACK_NULL );
num_channels = flags.channels;
std::size_t frames_per_buffer = flags.samplerate * flags.buffer / 1000;
num_chunks = ( flags.buffer + flags.period - 1 ) / flags.period;
if ( num_chunks < 2 ) {
num_chunks = 2;
}
frames_per_chunk = ( frames_per_buffer + num_chunks - 1 ) / num_chunks;
bytes_per_chunk = wfx.nBlockAlign * frames_per_chunk;
waveheaders.resize( num_chunks );
wavebuffers.resize( num_chunks );
for ( std::size_t i = 0; i < num_chunks; ++i ) {
wavebuffers[i].resize( bytes_per_chunk );
waveheaders[i] = WAVEHDR();
waveheaders[i].lpData = wavebuffers[i].data();
waveheaders[i].dwBufferLength = static_cast<DWORD>( wavebuffers[i].size() );
waveheaders[i].dwFlags = 0;
waveOutPrepareHeader( waveout, &waveheaders[i], sizeof( WAVEHDR ) );
}
}
~waveout_stream_raii() {
if ( waveout ) {
write_or_wait( true );
drain();
waveOutReset( waveout );
for ( std::size_t i = 0; i < num_chunks; ++i ) {
waveheaders[i].dwBufferLength = static_cast<DWORD>( wavebuffers[i].size() );
waveOutUnprepareHeader( waveout, &waveheaders[i], sizeof( WAVEHDR ) );
}
wavebuffers.clear();
waveheaders.clear();
frames_per_chunk = 0;
num_chunks = 0;
waveOutClose( waveout );
waveout = NULL;
}
}
private:
void drain() {
std::size_t empty_chunks = 0;
while ( empty_chunks != num_chunks ) {
empty_chunks = 0;
for ( std::size_t chunk = 0; chunk < num_chunks; ++chunk ) {
DWORD flags = waveheaders[chunk].dwFlags;
if ( !(flags & WHDR_INQUEUE) || (flags & WHDR_DONE) ) {
empty_chunks++;
}
}
if ( empty_chunks != num_chunks ) {
Sleep( 1 );
}
}
}
std::size_t wait_for_empty_chunk() {
while ( true ) {
for ( std::size_t chunk = 0; chunk < num_chunks; ++chunk ) {
DWORD flags = waveheaders[chunk].dwFlags;
if ( !(flags & WHDR_INQUEUE) || (flags & WHDR_DONE) ) {
return chunk;
}
}
Sleep( 1 );
}
}
void write_chunk() {
std::size_t chunk = wait_for_empty_chunk();
std::size_t chunk_bytes = std::min( byte_queue.size(), bytes_per_chunk );
waveheaders[chunk].dwBufferLength = static_cast<DWORD>( chunk_bytes );
for ( std::size_t byte = 0; byte < chunk_bytes; ++byte ) {
wavebuffers[chunk][byte] = byte_queue.front();
byte_queue.pop_front();
}
waveOutWrite( waveout, &waveheaders[chunk], sizeof( WAVEHDR ) );
}
void write_or_wait( bool flush = false ) {
while ( byte_queue.size() >= bytes_per_chunk ) {
write_chunk();
}
if ( flush && !byte_queue.empty() ) {
write_chunk();
}
}
template < typename Tsample >
void write_buffers( const std::vector<Tsample*> buffers, std::size_t frames ) {
for ( std::size_t frame = 0; frame < frames; ++frame ) {
for ( std::size_t channel = 0; channel < buffers.size(); ++channel ) {
Tsample val = buffers[channel][frame];
char buf[ sizeof( Tsample ) ];
std::memcpy( buf, &val, sizeof( Tsample ) );
std::copy( buf, buf + sizeof( Tsample ), std::back_inserter( byte_queue ) );
}
}
write_or_wait();
}
public:
void write( const std::vector<float*> buffers, std::size_t frames ) override {
write_buffers( buffers, frames );
}
void write( const std::vector<std::int16_t*> buffers, std::size_t frames ) override {
write_buffers( buffers, frames );
}
bool pause() override {
waveOutPause( waveout );
return true;
}
bool unpause() override {
waveOutRestart( waveout );
return true;
}
bool sleep( int ms ) override {
Sleep( ms );
return true;
}
};
static std::string show_waveout_devices( std::ostream & /*log*/ ) {
std::ostringstream devices;
devices << " waveout:" << std::endl;
for ( UINT i = 0; i < waveOutGetNumDevs(); ++i ) {
devices << " " << i << ": ";
WAVEOUTCAPSW caps;
ZeroMemory( &caps, sizeof( caps ) );
waveOutGetDevCapsW( i, &caps, sizeof( caps ) );
devices << mpt::transcode<std::string>( mpt::common_encoding::utf8, caps.szPname );
devices << std::endl;
}
return devices.str();
}
} // namespace openmpt123
#endif // WIN32
#endif // OPENMPT123_WAVEOUT_HPP
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