| /* |
| 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 |
| |
| #if defined(_WIN32_WCE) |
| #define WINDOWS_OS_NAME "Windows CE/PocketPC" |
| #elif defined(WIN64) |
| #define WINDOWS_OS_NAME "Win64" |
| #else |
| #define WINDOWS_OS_NAME "Win32" |
| #endif |
| |
| /* 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 */ |
| #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
| ReleaseSemaphoreCE(this->hidden->audio_sem, 1, NULL); |
| #else |
| ReleaseSemaphore(this->hidden->audio_sem, 1, NULL); |
| #endif |
| } |
| |
| 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 |
| WINWAVEOUT_ThreadInit(_THIS) |
| { |
| SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST); |
| } |
| |
| void |
| WINWAVEOUT_WaitDevice(_THIS) |
| { |
| /* Wait for an audio chunk to finish */ |
| #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
| WaitForSemaphoreCE(this->hidden->audio_sem, INFINITE); |
| #else |
| WaitForSingleObject(this->hidden->audio_sem, INFINITE); |
| #endif |
| } |
| |
| Uint8 * |
| WINWAVEOUT_GetDeviceBuf(_THIS) |
| { |
| return (Uint8 *) (this->hidden->wavebuf[this->hidden->next_buffer].lpData); |
| } |
| |
| void |
| WINWAVEOUT_PlayDevice(_THIS) |
| { |
| /* Queue it up */ |
| waveOutWrite(this->hidden->sound, |
| &this->hidden->wavebuf[this->hidden->next_buffer], |
| sizeof (this->hidden->wavebuf[0])); |
| this->hidden->next_buffer = (this->hidden->next_buffer + 1) % NUM_BUFFERS; |
| } |
| |
| void |
| WINWAVEOUT_WaitDone(_THIS) |
| { |
| int i, left; |
| |
| do { |
| left = NUM_BUFFERS; |
| for (i = 0; i < NUM_BUFFERS; ++i) { |
| if (this->hidden->wavebuf[i].dwFlags & WHDR_DONE) { |
| --left; |
| } |
| } |
| if (left > 0) { |
| SDL_Delay(100); |
| } |
| } |
| while (left > 0); |
| } |
| |
| void |
| WINWAVEOUT_CloseDevice(_THIS) |
| { |
| /* Close up audio */ |
| if (this->hidden != NULL) { |
| int i; |
| |
| if (this->hidden->audio_sem) { |
| #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
| CloseSynchHandle(this->hidden->audio_sem); |
| #else |
| CloseHandle(this->hidden->audio_sem); |
| #endif |
| this->hidden->audio_sem = 0; |
| } |
| |
| if (this->hidden->sound) { |
| waveOutClose(this->hidden->sound); |
| this->hidden->sound = 0; |
| } |
| |
| /* Clean up mixing buffers */ |
| for (i = 0; i < NUM_BUFFERS; ++i) { |
| if (this->hidden->wavebuf[i].dwUser != 0xFFFF) { |
| waveOutUnprepareHeader(this->hidden->sound, |
| &this->hidden->wavebuf[i], |
| sizeof (this->hidden->wavebuf[i])); |
| this->hidden->wavebuf[i].dwUser = 0xFFFF; |
| } |
| } |
| |
| if (this->hidden->mixbuf != NULL) { |
| /* Free raw mixing buffer */ |
| SDL_free(this->hidden->mixbuf); |
| this->hidden->mixbuf = NULL; |
| } |
| |
| SDL_free(this->hidden); |
| this->hidden = NULL; |
| } |
| } |
| |
| int |
| WINWAVEOUT_OpenDevice(_THIS, const char *devname, int iscapture) |
| { |
| SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format); |
| int valid_datatype = 0; |
| MMRESULT result; |
| WAVEFORMATEX waveformat; |
| int i; |
| |
| /* Initialize all variables that we clean on shutdown */ |
| this->hidden = (struct SDL_PrivateAudioData *) |
| SDL_malloc((sizeof *this->hidden)); |
| if (this->hidden == NULL) { |
| SDL_OutOfMemory(); |
| return 0; |
| } |
| SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| |
| /* Initialize the wavebuf structures for closing */ |
| for (i = 0; i < NUM_BUFFERS; ++i) |
| this->hidden->wavebuf[i].dwUser = 0xFFFF; |
| |
| while ((!valid_datatype) && (test_format)) { |
| valid_datatype = 1; |
| _this->spec.format = test_format; |
| switch (test_format) { |
| case AUDIO_U8: |
| case AUDIO_S16: |
| case AUDIO_S32: |
| break; /* valid. */ |
| |
| default: |
| valid_datatype = 0; |
| test_format = SDL_NextAudioFormat(); |
| break; |
| } |
| } |
| |
| if (!valid_datatype) { |
| WINWAVEOUT_CloseDevice(this); |
| SDL_SetError("Unsupported audio format"); |
| return 0; |
| } |
| |
| /* Set basic WAVE format parameters */ |
| SDL_memset(&waveformat, '\0', sizeof (waveformat)); |
| waveformat.wFormatTag = WAVE_FORMAT_PCM; |
| waveformat.wBitsPerSample = SDL_AUDIO_BITSIZE(this->spec.format); |
| |
| if (this->spec.channels > 2) |
| this->spec.channels = 2; /* !!! FIXME: is this right? */ |
| |
| waveformat.nChannels = this->spec.channels; |
| waveformat.nSamplesPerSec = this->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 (this->spec.samples < (this->spec.freq / 4)) |
| this->spec.samples = ((this->spec.freq / 4) + 3) & ~3; |
| |
| /* Update the fragment size as size in bytes */ |
| SDL_CalculateAudioSpec(&this->spec); |
| |
| /* Open the audio device */ |
| result = waveOutOpen(&this->hidden->sound, WAVE_MAPPER, &waveformat, |
| (DWORD_PTR) FillSound, (DWORD_PTR) this, |
| CALLBACK_FUNCTION); |
| if (result != MMSYSERR_NOERROR) { |
| WINWAVEOUT_CloseDevice(this); |
| SetMMerror("waveOutOpen()", result); |
| return 0; |
| } |
| #ifdef SOUND_DEBUG |
| /* Check the sound device we retrieved */ |
| { |
| WAVEOUTCAPS caps; |
| |
| result = waveOutGetDevCaps((UINT) this->hidden->sound, |
| &caps, sizeof(caps)); |
| if (result != MMSYSERR_NOERROR) { |
| WINWAVEOUT_CloseDevice(this); |
| SetMMerror("waveOutGetDevCaps()", result); |
| return 0; |
| } |
| printf("Audio device: %s\n", caps.szPname); |
| } |
| #endif |
| |
| /* Create the audio buffer semaphore */ |
| this->hidden->audio_sem = |
| #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
| CreateSemaphoreCE(NULL, NUM_BUFFERS - 1, NUM_BUFFERS, NULL); |
| #else |
| CreateSemaphore(NULL, NUM_BUFFERS - 1, NUM_BUFFERS, NULL); |
| #endif |
| if (this->hidden->audio_sem == NULL) { |
| WINWAVEOUT_CloseDevice(this); |
| SDL_SetError("Couldn't create semaphore"); |
| return 0; |
| } |
| |
| /* Create the sound buffers */ |
| this->hidden->mixbuf = (Uint8 *) SDL_malloc(NUM_BUFFERS * this->spec.size); |
| if (mixbuf == NULL) { |
| WINWAVEOUT_CloseDevice(this); |
| SDL_OutOfMemory(); |
| return 0; |
| } |
| for (i = 0; i < NUM_BUFFERS; ++i) { |
| SDL_memset(&this->hidden->wavebuf[i], '\0', |
| sizeof (this->hidden->wavebuf[i])); |
| this->hidden->wavebuf[i].dwBufferLength = this->spec.size; |
| this->hidden->wavebuf[i].dwFlags = WHDR_DONE; |
| this->hidden->wavebuf[i].lpData = |
| (LPSTR) &this->hidden->mixbuf[i * this->spec.size]; |
| result = waveOutPrepareHeader(this->hidden->sound, |
| &this->hidden->wavebuf[i], |
| sizeof (this->hidden->wavebuf[i])); |
| if (result != MMSYSERR_NOERROR) { |
| WINWAVEOUT_CloseDevice(this); |
| SetMMerror("waveOutPrepareHeader()", result); |
| return 0; |
| } |
| } |
| |
| return 1; /* Ready to go! */ |
| } |
| |
| |
| static int |
| WINWAVEOUT_Init(SDL_AudioDriverImpl *impl) |
| { |
| /* Set the function pointers */ |
| impl->OpenDevice = WINWAVEOUT_OpenDevice; |
| impl->ThreadInit = WINWAVEOUT_ThreadInit; |
| impl->PlayDevice = WINWAVEOUT_PlayDevice; |
| impl->WaitDevice = WINWAVEOUT_WaitDevice; |
| impl->WaitDone = WINWAVEOUT_WaitDone; |
| impl->GetDeviceBuf = WINWAVEOUT_GetDeviceBuf; |
| impl->CloseDevice = WINWAVEOUT_CloseDevice; |
| impl->OnlyHasDefaultOutputDevice = 1; /* !!! FIXME: Is this true? */ |
| |
| return 1; |
| } |
| |
| AudioBootStrap WINWAVEOUT_bootstrap = { |
| "waveout", WINDOWS_OS_NAME " WaveOut", WINWAVEOUT_Init, 0 |
| }; |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |
