Mercurial > sdl-ios-xcode
diff src/audio/windib/SDL_dibaudio.c @ 1895:c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Mon, 10 Jul 2006 21:04:37 +0000 |
parents | 84de7511f79f |
children | 4ad1e863d100 |
line wrap: on
line diff
--- a/src/audio/windib/SDL_dibaudio.c Thu Jul 06 18:01:37 2006 +0000 +++ b/src/audio/windib/SDL_dibaudio.c Mon Jul 10 21:04:37 2006 +0000 @@ -37,7 +37,7 @@ /* Audio driver functions */ -static int DIB_OpenAudio(_THIS, SDL_AudioSpec *spec); +static int DIB_OpenAudio(_THIS, SDL_AudioSpec * spec); static void DIB_ThreadInit(_THIS); static void DIB_WaitAudio(_THIS); static Uint8 *DIB_GetAudioBuf(_THIS); @@ -47,276 +47,290 @@ /* Audio driver bootstrap functions */ -static int Audio_Available(void) +static int +Audio_Available(void) { - return(1); + return (1); } -static void Audio_DeleteDevice(SDL_AudioDevice *device) +static void +Audio_DeleteDevice(SDL_AudioDevice * device) { - SDL_free(device->hidden); - SDL_free(device); + SDL_free(device->hidden); + SDL_free(device); } -static SDL_AudioDevice *Audio_CreateDevice(int devindex) +static SDL_AudioDevice * +Audio_CreateDevice(int devindex) { - SDL_AudioDevice *this; + 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)); + /* 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; + /* 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; + this->free = Audio_DeleteDevice; - return this; + return this; } AudioBootStrap WAVEOUT_bootstrap = { - "waveout", "Win95/98/NT/2000 WaveOut", - Audio_Available, Audio_CreateDevice + "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) +static void CALLBACK +FillSound(HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance, + DWORD dwParam1, DWORD dwParam2) { - SDL_AudioDevice *this = (SDL_AudioDevice *)dwInstance; + SDL_AudioDevice *this = (SDL_AudioDevice *) dwInstance; - /* Only service "buffer done playing" messages */ - if ( uMsg != WOM_DONE ) - return; + /* Only service "buffer done playing" messages */ + if (uMsg != WOM_DONE) + return; - /* Signal that we are done playing a buffer */ + /* Signal that we are done playing a buffer */ #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) - ReleaseSemaphoreCE(audio_sem, 1, NULL); + ReleaseSemaphoreCE(audio_sem, 1, NULL); #else - ReleaseSemaphore(audio_sem, 1, NULL); + ReleaseSemaphore(audio_sem, 1, NULL); #endif } -static void SetMMerror(char *function, MMRESULT code) +static void +SetMMerror(char *function, MMRESULT code) { - size_t len; - char errbuf[MAXERRORLENGTH]; + size_t len; + char errbuf[MAXERRORLENGTH]; #ifdef _WIN32_WCE - wchar_t werrbuf[MAXERRORLENGTH]; + wchar_t werrbuf[MAXERRORLENGTH]; #endif - SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: ", function); - len = SDL_strlen(errbuf); + 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); + /* 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)); + waveOutGetErrorText(code, errbuf + len, (UINT) (MAXERRORLENGTH - len)); #endif - SDL_SetError("%s",errbuf); + SDL_SetError("%s", errbuf); } /* Set high priority for the audio thread */ -static void DIB_ThreadInit(_THIS) +static void +DIB_ThreadInit(_THIS) { - SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST); + SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST); } -void DIB_WaitAudio(_THIS) +void +DIB_WaitAudio(_THIS) { - /* Wait for an audio chunk to finish */ + /* Wait for an audio chunk to finish */ #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) - WaitForSemaphoreCE(audio_sem, INFINITE); + WaitForSemaphoreCE(audio_sem, INFINITE); #else - WaitForSingleObject(audio_sem, INFINITE); + WaitForSingleObject(audio_sem, INFINITE); #endif } -Uint8 *DIB_GetAudioBuf(_THIS) +Uint8 * +DIB_GetAudioBuf(_THIS) { - Uint8 *retval; + Uint8 *retval; - retval = (Uint8 *)(wavebuf[next_buffer].lpData); - return retval; + retval = (Uint8 *) (wavebuf[next_buffer].lpData); + return retval; } -void DIB_PlayAudio(_THIS) +void +DIB_PlayAudio(_THIS) { - /* Queue it up */ - waveOutWrite(sound, &wavebuf[next_buffer], sizeof(wavebuf[0])); - next_buffer = (next_buffer+1)%NUM_BUFFERS; + /* Queue it up */ + waveOutWrite(sound, &wavebuf[next_buffer], sizeof(wavebuf[0])); + next_buffer = (next_buffer + 1) % NUM_BUFFERS; } -void DIB_WaitDone(_THIS) +void +DIB_WaitDone(_THIS) { - int i, left; + int i, left; - do { - left = NUM_BUFFERS; - for ( i=0; i<NUM_BUFFERS; ++i ) { - if ( wavebuf[i].dwFlags & WHDR_DONE ) { - --left; - } - } - if ( left > 0 ) { - SDL_Delay(100); - } - } while ( left > 0 ); + do { + left = NUM_BUFFERS; + for (i = 0; i < NUM_BUFFERS; ++i) { + if (wavebuf[i].dwFlags & WHDR_DONE) { + --left; + } + } + if (left > 0) { + SDL_Delay(100); + } + } + while (left > 0); } -void DIB_CloseAudio(_THIS) +void +DIB_CloseAudio(_THIS) { - int i; + int i; - /* Close up audio */ - if ( audio_sem ) { + /* Close up audio */ + if (audio_sem) { #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) - CloseSynchHandle(audio_sem); + CloseSynchHandle(audio_sem); #else - CloseHandle(audio_sem); + CloseHandle(audio_sem); #endif - } - if ( sound ) { - waveOutClose(sound); - } + } + if (sound) { + waveOutClose(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; - } + /* 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; + } } -int DIB_OpenAudio(_THIS, SDL_AudioSpec *spec) +int +DIB_OpenAudio(_THIS, SDL_AudioSpec * spec) { - MMRESULT result; - int i; - WAVEFORMATEX waveformat; + MMRESULT result; + int i; + WAVEFORMATEX waveformat; - /* Initialize the wavebuf structures for closing */ - sound = NULL; - audio_sem = NULL; - for ( i = 0; i < NUM_BUFFERS; ++i ) - wavebuf[i].dwUser = 0xFFFF; - mixbuf = NULL; + /* Initialize the wavebuf structures for closing */ + sound = NULL; + audio_sem = NULL; + 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; + /* 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; + /* 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; + /* 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); + /* 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); - } - + /* 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; + /* 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); - } + 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 */ + /* Create the audio buffer semaphore */ #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) - audio_sem = CreateSemaphoreCE(NULL, NUM_BUFFERS-1, NUM_BUFFERS, NULL); + audio_sem = CreateSemaphoreCE(NULL, NUM_BUFFERS - 1, NUM_BUFFERS, NULL); #else - audio_sem = CreateSemaphore(NULL, NUM_BUFFERS-1, NUM_BUFFERS, NULL); + audio_sem = CreateSemaphore(NULL, NUM_BUFFERS - 1, NUM_BUFFERS, NULL); #endif - if ( audio_sem == NULL ) { - SDL_SetError("Couldn't create semaphore"); - return(-1); - } + if (audio_sem == 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); - } - } + /* 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); + /* Ready to go! */ + next_buffer = 0; + return (0); } + +/* vi: set ts=4 sw=4 expandtab: */