static DWORD CALLBACK
win32_audio_out_callback (HWAVEOUT hwave, UINT msg, DWORD data, DWORD param1, DWORD param2)
{ Win32_Audio_Data *audio_data ;
if (! data)
return 1 ;
/*
** I consider this technique of passing a pointer via an integer as
** fundamentally broken but thats the way microsoft has defined the
** interface.
*/
audio_data = (Win32_Audio_Data*) data ;
if (msg == MM_WOM_DONE)
win32_play_data (audio_data) ;
return 0 ;
} /* win32_audio_out_callback */
static void
win32_play (int argc, char *argv [])
{ Win32_Audio_Data audio_data ;
WAVEFORMATEX wf ;
int k, error ;
audio_data.sndfile = NULL ;
audio_data.hwave = 0 ;
for (k = 1 ; k < argc ; k++)
{ printf ("Playing %s\n", argv [k]) ;
if (! (audio_data.sndfile = sf_open (argv [k], SFM_READ, &(audio_data.sfinfo))))
{ puts (sf_strerror (NULL)) ;
continue ;
} ;
audio_data.remaining = audio_data.sfinfo.frames * audio_data.sfinfo.channels ;
audio_data.current = 0 ;
InitializeCriticalSection (&audio_data.mutex) ;
audio_data.Event = CreateEvent (0, FALSE, FALSE, 0) ;
wf.nChannels = audio_data.sfinfo.channels ;
wf.wFormatTag = WAVE_FORMAT_PCM ;
wf.cbSize = 0 ;
wf.wBitsPerSample = 16 ;
wf.nSamplesPerSec = audio_data.sfinfo.samplerate ;
wf.nBlockAlign = audio_data.sfinfo.channels * sizeof (short) ;
wf.nAvgBytesPerSec = wf.nBlockAlign * wf.nSamplesPerSec ;
error = waveOutOpen (&(audio_data.hwave), WAVE_MAPPER, &wf, (DWORD_PTR) win32_audio_out_callback,
(DWORD_PTR) &audio_data, CALLBACK_FUNCTION) ;
if (error)
{ puts ("waveOutOpen failed.") ;
audio_data.hwave = 0 ;
continue ;
} ;
audio_data.whdr [0].lpData = (char*) audio_data.buffer ;
audio_data.whdr [1].lpData = ((char*) audio_data.buffer) + sizeof (audio_data.buffer) / 2 ;
audio_data.whdr [0].dwBufferLength = sizeof (audio_data.buffer) / 2 ;
audio_data.whdr [1].dwBufferLength = sizeof (audio_data.buffer) / 2 ;
audio_data.whdr [0].dwFlags = 0 ;
audio_data.whdr [1].dwFlags = 0 ;
/* length of each audio buffer in samples */
audio_data.bufferlen = sizeof (audio_data.buffer) / 2 / sizeof (short) ;
/* Prepare the WAVEHDRs */
if ((error = waveOutPrepareHeader (audio_data.hwave, &(audio_data.whdr [0]), sizeof (WAVEHDR))))
{ printf ("waveOutPrepareHeader [0] failed : %08X\n", error) ;
waveOutClose (audio_data.hwave) ;
continue ;
} ;
if ((error = waveOutPrepareHeader (audio_data.hwave, &(audio_data.whdr [1]), sizeof (WAVEHDR))))
{ printf ("waveOutPrepareHeader [1] failed : %08X\n", error) ;
waveOutUnprepareHeader (audio_data.hwave, &(audio_data.whdr [0]), sizeof (WAVEHDR)) ;
waveOutClose (audio_data.hwave) ;
continue ;
} ;
/* Fill up both buffers with audio data */
audio_data.BuffersInUse = 0 ;
win32_play_data (&audio_data) ;
win32_play_data (&audio_data) ;
/* loop until both buffers are released */
while (audio_data.BuffersInUse > 0)
{
/* wait for buffer to be released */
WaitForSingleObject (audio_data.Event, INFINITE) ;
/* refill the buffer if there is more data to play */
win32_play_data (&audio_data) ;
} ;
waveOutUnprepareHeader (audio_data.hwave, &(audio_data.whdr [0]), sizeof (WAVEHDR)) ;
waveOutUnprepareHeader (audio_data.hwave, &(audio_data.whdr [1]), sizeof (WAVEHDR)) ;
waveOutClose (audio_data.hwave) ;
audio_data.hwave = 0 ;
DeleteCriticalSection (&audio_data.mutex) ;
sf_close (audio_data.sndfile) ;
} ;
} /* win32_play */
static void
win32_play (int argc, char *argv [])
{ Win32_Audio_Data audio_data ;
WAVEFORMATEX wf ;
int k, error ;
audio_data.sndfile = NULL ;
audio_data.hwave = 0 ;
for (k = 1 ; k < argc ; k++)
{ printf ("Playing %s\n", argv [k]) ;
if (! (audio_data.sndfile = sf_open (argv [k], SFM_READ, &(audio_data.sfinfo))))
{ puts (sf_strerror (NULL)) ;
continue ;
} ;
audio_data.remaining = audio_data.sfinfo.frames ;
audio_data.current = 0 ;
audio_data.Event = CreateEvent (0, FALSE, FALSE, 0) ;
wf.nChannels = audio_data.sfinfo.channels ;
wf.wFormatTag = WAVE_FORMAT_PCM ;
wf.cbSize = 0 ;
wf.wBitsPerSample = 16 ;
wf.nSamplesPerSec = audio_data.sfinfo.samplerate ;
wf.nBlockAlign = audio_data.sfinfo.channels * sizeof (short) ;
wf.nAvgBytesPerSec = wf.nBlockAlign * wf.nSamplesPerSec ;
error = waveOutOpen (&(audio_data.hwave), WAVE_MAPPER, &wf, (DWORD) win32_audio_out_callback,
(DWORD) &audio_data, CALLBACK_FUNCTION) ;
if (error)
{ puts ("waveOutOpen failed.") ;
audio_data.hwave = 0 ;
continue ;
} ;
waveOutPause (audio_data.hwave) ;
audio_data.whdr [0].lpData = (char*) audio_data.buffer ;
audio_data.whdr [1].lpData = ((char*) audio_data.buffer) + sizeof (audio_data.buffer) / 2 ;
audio_data.whdr [0].dwBufferLength = sizeof (audio_data.buffer) / 2 ;
audio_data.whdr [1].dwBufferLength = sizeof (audio_data.buffer) / 2 ;
audio_data.bufferlen = sizeof (audio_data.buffer) / 2 / sizeof (short) ;
/* Prepare the WAVEHDRs */
if ((error = waveOutPrepareHeader (audio_data.hwave, &(audio_data.whdr [0]), sizeof (WAVEHDR))))
{ printf("waveOutPrepareHeader [0] failed : %08X\n", error) ;
waveOutClose (audio_data.hwave) ;
continue ;
} ;
if ((error = waveOutPrepareHeader (audio_data.hwave, &(audio_data.whdr [1]), sizeof (WAVEHDR))))
{ printf("waveOutPrepareHeader [1] failed : %08X\n", error) ;
waveOutUnprepareHeader (audio_data.hwave, &(audio_data.whdr [0]), sizeof(WAVEHDR)) ;
waveOutClose (audio_data.hwave) ;
continue ;
} ;
waveOutRestart (audio_data.hwave) ;
/* Need to call this twice to queue up enough audio. */
win32_play_data (&audio_data) ;
win32_play_data (&audio_data) ;
/* Wait for playback to finish. My callback notifies me when all wave data has been played */
WaitForSingleObject (audio_data.Event, INFINITE);
waveOutPause (audio_data.hwave) ;
waveOutReset (audio_data.hwave);
waveOutUnprepareHeader (audio_data.hwave, &(audio_data.whdr [0]), sizeof(WAVEHDR)) ;
waveOutUnprepareHeader (audio_data.hwave, &(audio_data.whdr [1]), sizeof(WAVEHDR)) ;
waveOutClose (audio_data.hwave) ;
audio_data.hwave = 0 ;
sf_close (audio_data.sndfile) ;
} ;
} /* win32_play */
