distrib/sdl-1.2.12/src/audio/windib/SDL_dibaudio.c - platform/external/qemu - Gitiles

 /*
     SDL - Simple DirectMedia Layer
     Copyright (C) 1997-2006 Sam Lantinga

     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.

     This library 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
     Lesser General Public License for more details.

     You should have received a copy of the GNU Lesser General Public
     License along with this library; if not, write to the Free Software
     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

     Sam Lantinga
     slouken@libsdl.org
 */
 #include "SDL_config.h"

 /* Allow access to a raw mixing buffer */

 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <mmsystem.h>

 #include "SDL_timer.h"
 #include "SDL_audio.h"
 #include "../SDL_audio_c.h"
 #include "SDL_dibaudio.h"
 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
 #include "win_ce_semaphore.h"
 #endif


 /* Audio driver functions */
 static int DIB_OpenAudio(_THIS, SDL_AudioSpec *spec);
 static void DIB_ThreadInit(_THIS);
 static void DIB_WaitAudio(_THIS);
 static Uint8 *DIB_GetAudioBuf(_THIS);
 static void DIB_PlayAudio(_THIS);
 static void DIB_WaitDone(_THIS);
 static void DIB_CloseAudio(_THIS);

 int volatile   dibaudio_thread_debug = 0;
 int volatile   dibaudio_cb_debug     = 0;
 int volatile   dibaudio_main_debug   = 0;

 /* Audio driver bootstrap functions */

 static int Audio_Available(void)
 {
 	return(1);
 }

 static void Audio_DeleteDevice(SDL_AudioDevice *device)
 {
 	SDL_free(device->hidden);
 	SDL_free(device);
 }

 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
 {
 	SDL_AudioDevice *this;

 	/* Initialize all variables that we clean on shutdown */
 	this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
 	if ( this ) {
 		SDL_memset(this, 0, (sizeof *this));
 		this->hidden = (struct SDL_PrivateAudioData *)
 				SDL_malloc((sizeof *this->hidden));
 	}
 	if ( (this == NULL) || (this->hidden == NULL) ) {
 		SDL_OutOfMemory();
 		if ( this ) {
 			SDL_free(this);
 		}
 		return(0);
 	}
 	SDL_memset(this->hidden, 0, (sizeof *this->hidden));

 	/* Set the function pointers */
 	this->OpenAudio = DIB_OpenAudio;
 	this->ThreadInit = DIB_ThreadInit;
 	this->WaitAudio = DIB_WaitAudio;
 	this->PlayAudio = DIB_PlayAudio;
 	this->GetAudioBuf = DIB_GetAudioBuf;
 	this->WaitDone = DIB_WaitDone;
 	this->CloseAudio = DIB_CloseAudio;

 	this->free = Audio_DeleteDevice;

 	return this;
 }

 AudioBootStrap WAVEOUT_bootstrap = {
 	"waveout", "Win95/98/NT/2000 WaveOut",
 	Audio_Available, Audio_CreateDevice
 };


 /* The Win32 callback for filling the WAVE device */
 static void CALLBACK FillSound(HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance,
 						DWORD dwParam1, DWORD dwParam2)
 {
 	SDL_AudioDevice *this = (SDL_AudioDevice *)dwInstance;

 	/* Only service "buffer done playing" messages */
 	if ( uMsg != WOM_DONE )
 		return;

 	/* Signal that we are done playing a buffer */
 	dibaudio_cb_debug = 1;
 	EnterCriticalSection( &audio_cs );
 	dibaudio_cb_debug = 2;
 	SetEvent( audio_event );
 	dibaudio_cb_debug = 3;
 	LeaveCriticalSection( &audio_cs );
 	dibaudio_cb_debug = 4;
 }

 static void SetMMerror(char *function, MMRESULT code)
 {
 	size_t len;
 	char errbuf[MAXERRORLENGTH];
 #ifdef _WIN32_WCE
 	wchar_t werrbuf[MAXERRORLENGTH];
 #endif

 	SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: ", function);
 	len = SDL_strlen(errbuf);

 #ifdef _WIN32_WCE
 	/* UNICODE version */
 	waveOutGetErrorText(code, werrbuf, MAXERRORLENGTH-len);
 	WideCharToMultiByte(CP_ACP,0,werrbuf,-1,errbuf+len,MAXERRORLENGTH-len,NULL,NULL);
 #else
 	waveOutGetErrorText(code, errbuf+len, (UINT)(MAXERRORLENGTH-len));
 #endif

 	SDL_SetError("%s",errbuf);
 }

 /* Set high priority for the audio thread */
 static void DIB_ThreadInit(_THIS)
 {
 	SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST);
 }

 void DIB_WaitAudio(_THIS)
 {
 	/* Wait for an audio chunk to finish */
 	dibaudio_thread_debug = 1;
 	WaitForSingleObject(audio_event, INFINITE);
 	dibaudio_thread_debug = 2;
 	ResetEvent( audio_event );
 	dibaudio_thread_debug = 3;
 }

 Uint8 *DIB_GetAudioBuf(_THIS)
 {
     Uint8 *retval;

 	dibaudio_thread_debug = 4;
     EnterCriticalSection( &audio_cs );
 	dibaudio_thread_debug = 5;
 	retval = (Uint8 *)(wavebuf[next_buffer].lpData);
 	return retval;
 }

 void DIB_PlayAudio(_THIS)
 {
 	/* Queue it up */
 	dibaudio_thread_debug = 6;
 	waveOutWrite(sound, &wavebuf[next_buffer], sizeof(wavebuf[0]));
 	dibaudio_thread_debug = 7;
 	next_buffer = (next_buffer+1)%NUM_BUFFERS;
 	LeaveCriticalSection( &audio_cs );
 	dibaudio_thread_debug = 8;
 }

 void DIB_WaitDone(_THIS)
 {
 	int i, left, tries = 5;

 	dibaudio_thread_debug = 9;

    /* give some time for the wave output to send the last buffer,
 	* but don't hang if one was cancelled
 	*/
 	do {
 		left = NUM_BUFFERS;
 		for ( i=0; i<NUM_BUFFERS; ++i ) {
 			if ( wavebuf[i].dwFlags & WHDR_DONE ) {
 				--left;
 			}
 		}
 		if ( left == 0 )
 			break;

 		SDL_Delay(100);
 	} while ( --tries > 0 );

 	dibaudio_thread_debug = 10;
 }

 void DIB_CloseAudio(_THIS)
 {
 	int i;

 	/* Close up audio */
 	if ( audio_event != INVALID_HANDLE_VALUE ) {
 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
 		CloseSynchHandle(audio_event);
 #else
 		CloseHandle(audio_event);
 #endif
 	}
 	if ( sound ) {
 	    waveOutReset(sound);
 	}

 	/* Clean up mixing buffers */
 	for ( i=0; i<NUM_BUFFERS; ++i ) {
 		if ( wavebuf[i].dwUser != 0xFFFF ) {
 			waveOutUnprepareHeader(sound, &wavebuf[i],
 						sizeof(wavebuf[i]));
 			wavebuf[i].dwUser = 0xFFFF;
 		}
 	}
 	/* Free raw mixing buffer */
 	if ( mixbuf != NULL ) {
 		SDL_free(mixbuf);
 		mixbuf = NULL;
 	}

 	if ( sound )
 		waveOutClose(sound);
 }

 int DIB_OpenAudio(_THIS, SDL_AudioSpec *spec)
 {
 	MMRESULT result;
 	int i;
 	WAVEFORMATEX waveformat;

 	/* Initialize the wavebuf structures for closing */
 	sound = NULL;
 	InitializeCriticalSection( &audio_cs );
 	audio_event = INVALID_HANDLE_VALUE;
 	for ( i = 0; i < NUM_BUFFERS; ++i )
 		wavebuf[i].dwUser = 0xFFFF;
 	mixbuf = NULL;

 	/* Set basic WAVE format parameters */
 	SDL_memset(&waveformat, 0, sizeof(waveformat));
 	waveformat.wFormatTag = WAVE_FORMAT_PCM;

 	/* Determine the audio parameters from the AudioSpec */
 	switch ( spec->format & 0xFF ) {
 		case 8:
 			/* Unsigned 8 bit audio data */
 			spec->format = AUDIO_U8;
 			waveformat.wBitsPerSample = 8;
 			break;
 		case 16:
 			/* Signed 16 bit audio data */
 			spec->format = AUDIO_S16;
 			waveformat.wBitsPerSample = 16;
 			break;
 		default:
 			SDL_SetError("Unsupported audio format");
 			return(-1);
 	}
 	waveformat.nChannels = spec->channels;
 	waveformat.nSamplesPerSec = spec->freq;
 	waveformat.nBlockAlign =
 		waveformat.nChannels * (waveformat.wBitsPerSample/8);
 	waveformat.nAvgBytesPerSec =
 		waveformat.nSamplesPerSec * waveformat.nBlockAlign;

 	/* Check the buffer size -- minimum of 1/4 second (word aligned) */
 	if ( spec->samples < (spec->freq/4) )
 		spec->samples = ((spec->freq/4)+3)&~3;

 	/* Update the fragment size as size in bytes */
 	SDL_CalculateAudioSpec(spec);

 	/* Open the audio device */
 	result = waveOutOpen(&sound, WAVE_MAPPER, &waveformat,
 			(DWORD_PTR)FillSound, (DWORD_PTR)this, CALLBACK_FUNCTION);
 	if ( result != MMSYSERR_NOERROR ) {
 		SetMMerror("waveOutOpen()", result);
 		return(-1);
 	}

 #ifdef SOUND_DEBUG
 	/* Check the sound device we retrieved */
 	{
 		WAVEOUTCAPS caps;

 		result = waveOutGetDevCaps((UINT)sound, &caps, sizeof(caps));
 		if ( result != MMSYSERR_NOERROR ) {
 			SetMMerror("waveOutGetDevCaps()", result);
 			return(-1);
 		}
 		printf("Audio device: %s\n", caps.szPname);
 	}
 #endif

 	/* Create the audio buffer semaphore */
 	audio_event = CreateEvent( NULL, TRUE, FALSE, NULL );
 	if ( audio_event == NULL ) {
 		SDL_SetError("Couldn't create semaphore");
 		return(-1);
 	}

 	/* Create the sound buffers */
 	mixbuf = (Uint8 *)SDL_malloc(NUM_BUFFERS*spec->size);
 	if ( mixbuf == NULL ) {
 		SDL_SetError("Out of memory");
 		return(-1);
 	}
 	for ( i = 0; i < NUM_BUFFERS; ++i ) {
 		SDL_memset(&wavebuf[i], 0, sizeof(wavebuf[i]));
 		wavebuf[i].lpData = (LPSTR) &mixbuf[i*spec->size];
 		wavebuf[i].dwBufferLength = spec->size;
 		wavebuf[i].dwFlags = WHDR_DONE;
 		result = waveOutPrepareHeader(sound, &wavebuf[i],
 							sizeof(wavebuf[i]));
 		if ( result != MMSYSERR_NOERROR ) {
 			SetMMerror("waveOutPrepareHeader()", result);
 			return(-1);
 		}
 	}

 	/* Ready to go! */
 	next_buffer = 0;
 	return(0);
 }
	/*
	SDL - Simple DirectMedia Layer
	Copyright (C) 1997-2006 Sam Lantinga

	This library is free software; you can redistribute it and/or
	modify it under the terms of the GNU Lesser General Public
	License as published by the Free Software Foundation; either
	version 2.1 of the License, or (at your option) any later version.

	This library 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
	Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public
	License along with this library; if not, write to the Free Software
	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

	Sam Lantinga
	slouken@libsdl.org
	*/
	#include "SDL_config.h"

	/* Allow access to a raw mixing buffer */

	#define WIN32_LEAN_AND_MEAN
	#include <windows.h>
	#include <mmsystem.h>

	#include "SDL_timer.h"
	#include "SDL_audio.h"
	#include "../SDL_audio_c.h"
	#include "SDL_dibaudio.h"
	#if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
	#include "win_ce_semaphore.h"
	#endif


	/* Audio driver functions */
	static int DIB_OpenAudio(_THIS, SDL_AudioSpec *spec);
	static void DIB_ThreadInit(_THIS);
	static void DIB_WaitAudio(_THIS);
	static Uint8 *DIB_GetAudioBuf(_THIS);
	static void DIB_PlayAudio(_THIS);
	static void DIB_WaitDone(_THIS);
	static void DIB_CloseAudio(_THIS);

	int volatile dibaudio_thread_debug = 0;
	int volatile dibaudio_cb_debug = 0;
	int volatile dibaudio_main_debug = 0;

	/* Audio driver bootstrap functions */

	static int Audio_Available(void)
	{
	return(1);
	}

	static void Audio_DeleteDevice(SDL_AudioDevice *device)
	{
	SDL_free(device->hidden);
	SDL_free(device);
	}

	static SDL_AudioDevice *Audio_CreateDevice(int devindex)
	{
	SDL_AudioDevice *this;

	/* Initialize all variables that we clean on shutdown */
	this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
	if ( this ) {
	SDL_memset(this, 0, (sizeof *this));
	this->hidden = (struct SDL_PrivateAudioData *)
	SDL_malloc((sizeof *this->hidden));
	}
	if ( (this == NULL) \|\| (this->hidden == NULL) ) {
	SDL_OutOfMemory();
	if ( this ) {
	SDL_free(this);
	}
	return(0);
	}
	SDL_memset(this->hidden, 0, (sizeof *this->hidden));

	/* Set the function pointers */
	this->OpenAudio = DIB_OpenAudio;
	this->ThreadInit = DIB_ThreadInit;
	this->WaitAudio = DIB_WaitAudio;
	this->PlayAudio = DIB_PlayAudio;
	this->GetAudioBuf = DIB_GetAudioBuf;
	this->WaitDone = DIB_WaitDone;
	this->CloseAudio = DIB_CloseAudio;

	this->free = Audio_DeleteDevice;

	return this;
	}

	AudioBootStrap WAVEOUT_bootstrap = {
	"waveout", "Win95/98/NT/2000 WaveOut",
	Audio_Available, Audio_CreateDevice
	};


	/* The Win32 callback for filling the WAVE device */
	static void CALLBACK FillSound(HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance,
	DWORD dwParam1, DWORD dwParam2)
	{
	SDL_AudioDevice this = (SDL_AudioDevice )dwInstance;

	/* Only service "buffer done playing" messages */
	if ( uMsg != WOM_DONE )
	return;

	/* Signal that we are done playing a buffer */
	dibaudio_cb_debug = 1;
	EnterCriticalSection( &audio_cs );
	dibaudio_cb_debug = 2;
	SetEvent( audio_event );
	dibaudio_cb_debug = 3;
	LeaveCriticalSection( &audio_cs );
	dibaudio_cb_debug = 4;
	}

	static void SetMMerror(char *function, MMRESULT code)
	{
	size_t len;
	char errbuf[MAXERRORLENGTH];
	#ifdef _WIN32_WCE
	wchar_t werrbuf[MAXERRORLENGTH];
	#endif

	SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: ", function);
	len = SDL_strlen(errbuf);

	#ifdef _WIN32_WCE
	/* UNICODE version */
	waveOutGetErrorText(code, werrbuf, MAXERRORLENGTH-len);
	WideCharToMultiByte(CP_ACP,0,werrbuf,-1,errbuf+len,MAXERRORLENGTH-len,NULL,NULL);
	#else
	waveOutGetErrorText(code, errbuf+len, (UINT)(MAXERRORLENGTH-len));
	#endif

	SDL_SetError("%s",errbuf);
	}

	/* Set high priority for the audio thread */
	static void DIB_ThreadInit(_THIS)
	{
	SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST);
	}

	void DIB_WaitAudio(_THIS)
	{
	/* Wait for an audio chunk to finish */
	dibaudio_thread_debug = 1;
	WaitForSingleObject(audio_event, INFINITE);
	dibaudio_thread_debug = 2;
	ResetEvent( audio_event );
	dibaudio_thread_debug = 3;
	}

	Uint8 *DIB_GetAudioBuf(_THIS)
	{
	Uint8 *retval;

	dibaudio_thread_debug = 4;
	EnterCriticalSection( &audio_cs );
	dibaudio_thread_debug = 5;
	retval = (Uint8 *)(wavebuf[next_buffer].lpData);
	return retval;
	}

	void DIB_PlayAudio(_THIS)
	{
	/* Queue it up */
	dibaudio_thread_debug = 6;
	waveOutWrite(sound, &wavebuf[next_buffer], sizeof(wavebuf[0]));
	dibaudio_thread_debug = 7;
	next_buffer = (next_buffer+1)%NUM_BUFFERS;
	LeaveCriticalSection( &audio_cs );
	dibaudio_thread_debug = 8;
	}

	void DIB_WaitDone(_THIS)
	{
	int i, left, tries = 5;

	dibaudio_thread_debug = 9;

	/* give some time for the wave output to send the last buffer,
	* but don't hang if one was cancelled
	*/
	do {
	left = NUM_BUFFERS;
	for ( i=0; i<NUM_BUFFERS; ++i ) {
	if ( wavebuf[i].dwFlags & WHDR_DONE ) {
	--left;
	}
	}
	if ( left == 0 )
	break;

	SDL_Delay(100);
	} while ( --tries > 0 );

	dibaudio_thread_debug = 10;
	}

	void DIB_CloseAudio(_THIS)
	{
	int i;

	/* Close up audio */
	if ( audio_event != INVALID_HANDLE_VALUE ) {
	#if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
	CloseSynchHandle(audio_event);
	#else
	CloseHandle(audio_event);
	#endif
	}
	if ( sound ) {
	waveOutReset(sound);
	}

	/* Clean up mixing buffers */
	for ( i=0; i<NUM_BUFFERS; ++i ) {
	if ( wavebuf[i].dwUser != 0xFFFF ) {
	waveOutUnprepareHeader(sound, &wavebuf[i],
	sizeof(wavebuf[i]));
	wavebuf[i].dwUser = 0xFFFF;
	}
	}
	/* Free raw mixing buffer */
	if ( mixbuf != NULL ) {
	SDL_free(mixbuf);
	mixbuf = NULL;
	}

	if ( sound )
	waveOutClose(sound);
	}

	int DIB_OpenAudio(_THIS, SDL_AudioSpec *spec)
	{
	MMRESULT result;
	int i;
	WAVEFORMATEX waveformat;

	/* Initialize the wavebuf structures for closing */
	sound = NULL;
	InitializeCriticalSection( &audio_cs );
	audio_event = INVALID_HANDLE_VALUE;
	for ( i = 0; i < NUM_BUFFERS; ++i )
	wavebuf[i].dwUser = 0xFFFF;
	mixbuf = NULL;

	/* Set basic WAVE format parameters */
	SDL_memset(&waveformat, 0, sizeof(waveformat));
	waveformat.wFormatTag = WAVE_FORMAT_PCM;

	/* Determine the audio parameters from the AudioSpec */
	switch ( spec->format & 0xFF ) {
	case 8:
	/* Unsigned 8 bit audio data */
	spec->format = AUDIO_U8;
	waveformat.wBitsPerSample = 8;
	break;
	case 16:
	/* Signed 16 bit audio data */
	spec->format = AUDIO_S16;
	waveformat.wBitsPerSample = 16;
	break;
	default:
	SDL_SetError("Unsupported audio format");
	return(-1);
	}
	waveformat.nChannels = spec->channels;
	waveformat.nSamplesPerSec = spec->freq;
	waveformat.nBlockAlign =
	waveformat.nChannels * (waveformat.wBitsPerSample/8);
	waveformat.nAvgBytesPerSec =
	waveformat.nSamplesPerSec * waveformat.nBlockAlign;

	/* Check the buffer size -- minimum of 1/4 second (word aligned) */
	if ( spec->samples < (spec->freq/4) )
	spec->samples = ((spec->freq/4)+3)&~3;

	/* Update the fragment size as size in bytes */
	SDL_CalculateAudioSpec(spec);

	/* Open the audio device */
	result = waveOutOpen(&sound, WAVE_MAPPER, &waveformat,
	(DWORD_PTR)FillSound, (DWORD_PTR)this, CALLBACK_FUNCTION);
	if ( result != MMSYSERR_NOERROR ) {
	SetMMerror("waveOutOpen()", result);
	return(-1);
	}

	#ifdef SOUND_DEBUG
	/* Check the sound device we retrieved */
	{
	WAVEOUTCAPS caps;

	result = waveOutGetDevCaps((UINT)sound, &caps, sizeof(caps));
	if ( result != MMSYSERR_NOERROR ) {
	SetMMerror("waveOutGetDevCaps()", result);
	return(-1);
	}
	printf("Audio device: %s\n", caps.szPname);
	}
	#endif

	/* Create the audio buffer semaphore */
	audio_event = CreateEvent( NULL, TRUE, FALSE, NULL );
	if ( audio_event == NULL ) {
	SDL_SetError("Couldn't create semaphore");
	return(-1);
	}

	/* Create the sound buffers */
	mixbuf = (Uint8 )SDL_malloc(NUM_BUFFERSspec->size);
	if ( mixbuf == NULL ) {
	SDL_SetError("Out of memory");
	return(-1);
	}
	for ( i = 0; i < NUM_BUFFERS; ++i ) {
	SDL_memset(&wavebuf[i], 0, sizeof(wavebuf[i]));
	wavebuf[i].lpData = (LPSTR) &mixbuf[i*spec->size];
	wavebuf[i].dwBufferLength = spec->size;
	wavebuf[i].dwFlags = WHDR_DONE;
	result = waveOutPrepareHeader(sound, &wavebuf[i],
	sizeof(wavebuf[i]));
	if ( result != MMSYSERR_NOERROR ) {
	SetMMerror("waveOutPrepareHeader()", result);
	return(-1);
	}
	}

	/* Ready to go! */
	next_buffer = 0;
	return(0);
	}