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/* win32sound.c: Win32 sound using MS Windows Mulitmedia API
Copyright (c) 2007 Marek Januszewski
$Id: win32sound.c 3754 2008-08-20 03:34:23Z specu $
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Author contact information:
E-mail: philip-fuse@shadowmagic.org.uk
*/
#include <config.h>
#include <windows.h>
#include "settings.h"
#include "sound.h"
#include "ui/ui.h"
static HWAVEOUT hwaveout;
static WAVEHDR wavehdr[2];
static HANDLE sem_sound_done;
static CRITICAL_SECTION sound_lock;
#define BUFFER_SIZE 4096
static void *buffers[2];
static int buffer_used[2];
static int current_buffer;
static char buffer1[ BUFFER_SIZE ];
static char buffer2[ BUFFER_SIZE ];
static int sixteenbit;
static void
sound_display_mmresult( char *func, MMRESULT result );
static void CALLBACK
sound_callback( HWAVEOUT hwo,UINT uMsg,DWORD dwInstance,DWORD dwParam1,DWORD dwParam2 );
int
sound_lowlevel_init( const char *device, int *freqptr, int *stereoptr )
{
WAVEFORMATEX pcmwf; /* waveformat struct */
MMRESULT result;
/* create wave format description */
memset( &pcmwf, 0, sizeof( WAVEFORMATEX ) );
pcmwf.cbSize = 0;
if( settings_current.sound_force_8bit ) {
pcmwf.wBitsPerSample = 8;
sixteenbit = 0;
} else {
pcmwf.wBitsPerSample = 16;
sixteenbit = 1;
}
pcmwf.nChannels = *stereoptr ? 2 : 1;
pcmwf.nBlockAlign = pcmwf.nChannels * ( sixteenbit ? 2 : 1 );
pcmwf.nSamplesPerSec = *freqptr;
pcmwf.nAvgBytesPerSec = pcmwf.nSamplesPerSec * pcmwf.nBlockAlign;
pcmwf.wFormatTag = WAVE_FORMAT_PCM;
/* Open sound device for output */
result = waveOutOpen( &hwaveout, WAVE_MAPPER,
&pcmwf, ( DWORD_PTR ) sound_callback, 0,
CALLBACK_FUNCTION );
if( result != MMSYSERR_NOERROR )
sound_display_mmresult( "waveOutOpen", result );
buffers[0] = buffer1;
buffers[1] = buffer2;
buffer_used[0] = 0;
buffer_used[1] = 0;
current_buffer = 0;
memset( &wavehdr[0], 0, sizeof( WAVEHDR ) );
memset( &wavehdr[1], 0, sizeof( WAVEHDR ) );
sem_sound_done = CreateSemaphore( NULL, 0, 2, NULL );
InitializeCriticalSection( &sound_lock );
return 0;
}
void
sound_lowlevel_end( void )
{
MMRESULT result;
/* reset the sound */
result = waveOutReset( hwaveout );
if( result != MMSYSERR_NOERROR ) {
settings_current.sound = 0;
sound_display_mmresult( "Couldn't stop sound (waveOutReset)", result );
return;
}
/* unprepare wave headers */
if( wavehdr[ 0 ].dwFlags & WHDR_PREPARED ) {
result = waveOutUnprepareHeader( hwaveout, &wavehdr[ 0 ], sizeof( WAVEHDR ) );
if( result != MMSYSERR_NOERROR )
sound_display_mmresult( "waveOutUnprepareHeader", result );
}
if( wavehdr[ 1 ].dwFlags & WHDR_PREPARED ) {
result = waveOutUnprepareHeader( hwaveout, &wavehdr[ 1 ], sizeof( WAVEHDR ) );
if( result != MMSYSERR_NOERROR )
sound_display_mmresult( "waveOutUnprepareHeader", result );
}
/* close the device */
result = waveOutClose( hwaveout );
if( result != MMSYSERR_NOERROR ) {
settings_current.sound = 0;
sound_display_mmresult( "Couldn't stop sound (waveOutClose)", result );
}
CloseHandle( sem_sound_done );
DeleteCriticalSection( &sound_lock );
free( buffers[ 0 ] );
free( buffers[ 1 ] );
}
void
sound_lowlevel_frame( libspectrum_signed_word *data, int len )
{
static unsigned char buf8[4096];
MMRESULT result;
/* Convert to bytes */
unsigned char *bytes = (unsigned char *) data;
len <<= 1;
if( !sixteenbit ) {
libspectrum_signed_word *src;
unsigned char *dst;
int f;
src = data; dst = buf8;
len >>= 1;
/* TODO: confirm byteorder on IA64 */
for( f = 0; f < len; f++ )
*dst++ = 128 + (int)( (*src++) / 256 );
bytes = buf8;
}
if( len > BUFFER_SIZE ) {
ui_error( UI_ERROR_WARNING, "%s: requested wave size exceeds the buffer size", __func__ );
return;
}
/* wait for the buffer to finish playing */
if( buffer_used[ current_buffer ] > 0 )
WaitForSingleObject( sem_sound_done, INFINITE );
/* unprepare the header if it's prepared */
if( wavehdr[ current_buffer ].dwFlags & WHDR_PREPARED ) {
result = waveOutUnprepareHeader( hwaveout, &wavehdr[ current_buffer ], sizeof( WAVEHDR ) );
if( result != MMSYSERR_NOERROR )
sound_display_mmresult( "waveOutUnprepareHeader", result );
}
/* copy the new wave into the buffer */
memcpy( buffers[ current_buffer ], bytes, len );
buffer_used[ current_buffer ] = len;
/* prepare the header */
wavehdr[ current_buffer ].lpData = ( LPSTR ) bytes;
wavehdr[ current_buffer ].dwBufferLength = len;
wavehdr[ current_buffer ].dwLoops |= WHDR_BEGINLOOP | WHDR_ENDLOOP;
result = waveOutPrepareHeader( hwaveout, &wavehdr[ current_buffer ], sizeof( WAVEHDR ) );
if( result != MMSYSERR_NOERROR )
sound_display_mmresult( "waveOutPrepareHeader", result );
/* play */
result = waveOutWrite( hwaveout, &wavehdr[ current_buffer ], sizeof( WAVEHDR ) );
if( result != MMSYSERR_NOERROR )
sound_display_mmresult( "waveOutWrite", result );
/* FIXME this could be done way easier */
current_buffer++;
if( current_buffer == 2 )
current_buffer = 0;
}
static void
sound_display_mmresult( char *func, MMRESULT result )
{
char *mmresult;
switch ( result ) {
case WAVERR_BADFORMAT: mmresult = "WAVERR_BADFORMAT"; break;
case WAVERR_SYNC: mmresult = "WAVERR_SYNC"; break;
case WAVERR_STILLPLAYING: mmresult = "WAVERR_STILLPLAYING"; break;
case MMSYSERR_NOERROR: mmresult = "MMSYSERR_NOERROR"; break;
case MMSYSERR_BADDEVICEID: mmresult = "MMSYSERR_BADDEVICEID"; break;
case MMSYSERR_NODRIVER: mmresult = "MMSYSERR_NODRIVER"; break;
case MMSYSERR_INVALHANDLE: mmresult = "MMSYSERR_INVALHANDLE"; break;
case MMSYSERR_NOMEM: mmresult = "MMSYSERR_NOMEM"; break;
case MMSYSERR_ALLOCATED: mmresult = "MMSYSERR_ALLOCATED"; break;
default: mmresult = "UNKNOWN"; break;
}
ui_error( UI_ERROR_ERROR, "%s error: %s(error no: %d)", func, mmresult, result );
}
static void CALLBACK
sound_callback( HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance, DWORD_PTR dwParam1, DWORD_PTR dwParam2 )
{
if( uMsg == WOM_DONE ) {
EnterCriticalSection( &sound_lock );
ReleaseSemaphore( sem_sound_done, 1, NULL );
LeaveCriticalSection( &sound_lock );
}
}
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