src/audio/windib/SDL_dibaudio.c
author Ryan C. Gordon <icculus@icculus.org>
Wed, 13 Sep 2006 04:47:46 +0000
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parent 2008 4ad1e863d100
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child 3798 c8b3d3d13ed1
permissions -rw-r--r--
Fixed typo in windib audio.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2006 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* Allow access to a raw mixing buffer */
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <mmsystem.h>
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#include "SDL_timer.h"
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#include "SDL_audio.h"
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#include "../SDL_audio_c.h"
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#include "SDL_dibaudio.h"
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#if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
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#include "win_ce_semaphore.h"
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#endif
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/* Audio driver functions */
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static int DIB_OpenAudio(_THIS, SDL_AudioSpec * spec);
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static void DIB_ThreadInit(_THIS);
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static void DIB_WaitAudio(_THIS);
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static Uint8 *DIB_GetAudioBuf(_THIS);
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static void DIB_PlayAudio(_THIS);
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static void DIB_WaitDone(_THIS);
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static void DIB_CloseAudio(_THIS);
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/* Audio driver bootstrap functions */
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static int
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Audio_Available(void)
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{
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    return (1);
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}
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static void
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Audio_DeleteDevice(SDL_AudioDevice * device)
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{
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    SDL_free(device->hidden);
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    SDL_free(device);
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}
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static SDL_AudioDevice *
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Audio_CreateDevice(int devindex)
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{
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    SDL_AudioDevice *this;
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    /* Initialize all variables that we clean on shutdown */
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    this = (SDL_AudioDevice *) SDL_malloc(sizeof(SDL_AudioDevice));
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    if (this) {
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        SDL_memset(this, 0, (sizeof *this));
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        this->hidden = (struct SDL_PrivateAudioData *)
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            SDL_malloc((sizeof *this->hidden));
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    }
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    if ((this == NULL) || (this->hidden == NULL)) {
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        SDL_OutOfMemory();
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        if (this) {
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            SDL_free(this);
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        }
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        return (0);
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    }
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    SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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    /* Set the function pointers */
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    this->OpenAudio = DIB_OpenAudio;
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    this->ThreadInit = DIB_ThreadInit;
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    this->WaitAudio = DIB_WaitAudio;
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    this->PlayAudio = DIB_PlayAudio;
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    this->GetAudioBuf = DIB_GetAudioBuf;
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    this->WaitDone = DIB_WaitDone;
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    this->CloseAudio = DIB_CloseAudio;
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    this->free = Audio_DeleteDevice;
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    return this;
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}
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AudioBootStrap WAVEOUT_bootstrap = {
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    "waveout", "Win95/98/NT/2000 WaveOut",
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    Audio_Available, Audio_CreateDevice
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};
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/* The Win32 callback for filling the WAVE device */
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static void CALLBACK
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FillSound(HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance,
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          DWORD dwParam1, DWORD dwParam2)
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{
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    SDL_AudioDevice *this = (SDL_AudioDevice *) dwInstance;
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    /* Only service "buffer done playing" messages */
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    if (uMsg != WOM_DONE)
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        return;
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    /* Signal that we are done playing a buffer */
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#if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
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    ReleaseSemaphoreCE(audio_sem, 1, NULL);
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#else
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    ReleaseSemaphore(audio_sem, 1, NULL);
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#endif
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}
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static void
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SetMMerror(char *function, MMRESULT code)
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{
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    size_t len;
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    char errbuf[MAXERRORLENGTH];
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#ifdef _WIN32_WCE
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    wchar_t werrbuf[MAXERRORLENGTH];
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#endif
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    SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: ", function);
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    len = SDL_strlen(errbuf);
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#ifdef _WIN32_WCE
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    /* UNICODE version */
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    waveOutGetErrorText(code, werrbuf, MAXERRORLENGTH - len);
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    WideCharToMultiByte(CP_ACP, 0, werrbuf, -1, errbuf + len,
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                        MAXERRORLENGTH - len, NULL, NULL);
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#else
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    waveOutGetErrorText(code, errbuf + len, (UINT) (MAXERRORLENGTH - len));
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#endif
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    SDL_SetError("%s", errbuf);
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}
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/* Set high priority for the audio thread */
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static void
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DIB_ThreadInit(_THIS)
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{
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    SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST);
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}
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void
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DIB_WaitAudio(_THIS)
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{
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    /* Wait for an audio chunk to finish */
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#if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
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    WaitForSemaphoreCE(audio_sem, INFINITE);
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#else
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    WaitForSingleObject(audio_sem, INFINITE);
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#endif
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}
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Uint8 *
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DIB_GetAudioBuf(_THIS)
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{
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    Uint8 *retval;
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    retval = (Uint8 *) (wavebuf[next_buffer].lpData);
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    return retval;
0
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}
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void
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DIB_PlayAudio(_THIS)
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{
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    /* Queue it up */
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    waveOutWrite(sound, &wavebuf[next_buffer], sizeof(wavebuf[0]));
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    next_buffer = (next_buffer + 1) % NUM_BUFFERS;
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}
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void
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DIB_WaitDone(_THIS)
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{
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    int i, left;
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    do {
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        left = NUM_BUFFERS;
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        for (i = 0; i < NUM_BUFFERS; ++i) {
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            if (wavebuf[i].dwFlags & WHDR_DONE) {
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                --left;
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            }
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        }
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        if (left > 0) {
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            SDL_Delay(100);
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        }
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    }
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    while (left > 0);
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}
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void
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DIB_CloseAudio(_THIS)
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{
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    int i;
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    /* Close up audio */
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    if (audio_sem) {
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#if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
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        CloseSynchHandle(audio_sem);
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#else
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        CloseHandle(audio_sem);
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#endif
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    }
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    if (sound) {
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        waveOutClose(sound);
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    }
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    /* Clean up mixing buffers */
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    for (i = 0; i < NUM_BUFFERS; ++i) {
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        if (wavebuf[i].dwUser != 0xFFFF) {
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            waveOutUnprepareHeader(sound, &wavebuf[i], sizeof(wavebuf[i]));
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            wavebuf[i].dwUser = 0xFFFF;
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        }
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    }
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    /* Free raw mixing buffer */
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    if (mixbuf != NULL) {
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        SDL_free(mixbuf);
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        mixbuf = NULL;
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   229
    }
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}
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int
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DIB_OpenAudio(_THIS, SDL_AudioSpec * spec)
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{
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    MMRESULT result;
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    int i;
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    WAVEFORMATEX waveformat;
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    /* Initialize the wavebuf structures for closing */
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    sound = NULL;
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   241
    audio_sem = NULL;
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    for (i = 0; i < NUM_BUFFERS; ++i)
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   243
        wavebuf[i].dwUser = 0xFFFF;
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    mixbuf = NULL;
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    /* Set basic WAVE format parameters */
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   247
    SDL_memset(&waveformat, 0, sizeof(waveformat));
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    waveformat.wFormatTag = WAVE_FORMAT_PCM;
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   250
    /* Determine the audio parameters from the AudioSpec */
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   251
    switch (SDL_AUDIO_BITSIZE(spec->format)) {
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   252
    case 8:
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   253
        /* Unsigned 8 bit audio data */
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   254
        spec->format = AUDIO_U8;
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   255
        waveformat.wBitsPerSample = 8;
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   256
        break;
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   257
    case 16:
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   258
        /* Signed 16 bit audio data */
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   259
        spec->format = AUDIO_S16;
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        waveformat.wBitsPerSample = 16;
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   261
        break;
2026
a5d0758f88d8 Fixed typo in windib audio.
Ryan C. Gordon <icculus@icculus.org>
parents: 2008
diff changeset
   262
    case 32:
2008
4ad1e863d100 int32 support for windib and windx5 audio backends.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   263
        /* Signed 32 bit audio data */
4ad1e863d100 int32 support for windib and windx5 audio backends.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   264
        spec->format = AUDIO_S32;
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diff changeset
   265
        waveformat.wBitsPerSample = 32;
4ad1e863d100 int32 support for windib and windx5 audio backends.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   266
        break;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   267
    default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   268
        SDL_SetError("Unsupported audio format");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   269
        return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   270
    }
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   271
    waveformat.nChannels = spec->channels;
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   272
    waveformat.nSamplesPerSec = spec->freq;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   273
    waveformat.nBlockAlign =
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   274
        waveformat.nChannels * (waveformat.wBitsPerSample / 8);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   275
    waveformat.nAvgBytesPerSec =
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   276
        waveformat.nSamplesPerSec * waveformat.nBlockAlign;
0
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   277
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   278
    /* Check the buffer size -- minimum of 1/4 second (word aligned) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   279
    if (spec->samples < (spec->freq / 4))
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   280
        spec->samples = ((spec->freq / 4) + 3) & ~3;
0
74212992fb08 Initial revision
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parents:
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   281
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1456
diff changeset
   282
    /* Update the fragment size as size in bytes */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   283
    SDL_CalculateAudioSpec(spec);
0
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   284
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   285
    /* Open the audio device */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   286
    result = waveOutOpen(&sound, WAVE_MAPPER, &waveformat,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   287
                         (DWORD_PTR) FillSound, (DWORD_PTR) this,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   288
                         CALLBACK_FUNCTION);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   289
    if (result != MMSYSERR_NOERROR) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   290
        SetMMerror("waveOutOpen()", result);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   291
        return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
   292
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   293
#ifdef SOUND_DEBUG
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   294
    /* Check the sound device we retrieved */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
   295
    {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   296
        WAVEOUTCAPS caps;
0
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diff changeset
   297
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   298
        result = waveOutGetDevCaps((UINT) sound, &caps, sizeof(caps));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   299
        if (result != MMSYSERR_NOERROR) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   300
            SetMMerror("waveOutGetDevCaps()", result);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   301
            return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   302
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   303
        printf("Audio device: %s\n", caps.szPname);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   304
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   305
#endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   306
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   307
    /* Create the audio buffer semaphore */
36
13ee9f4834ea Windows CE patches contributed by Rainer Loritz
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
   308
#if defined(_WIN32_WCE) && (_WIN32_WCE < 300)
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   309
    audio_sem = CreateSemaphoreCE(NULL, NUM_BUFFERS - 1, NUM_BUFFERS, NULL);
36
13ee9f4834ea Windows CE patches contributed by Rainer Loritz
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
   310
#else
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   311
    audio_sem = CreateSemaphore(NULL, NUM_BUFFERS - 1, NUM_BUFFERS, NULL);
36
13ee9f4834ea Windows CE patches contributed by Rainer Loritz
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
   312
#endif
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   313
    if (audio_sem == NULL) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   314
        SDL_SetError("Couldn't create semaphore");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   315
        return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   316
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   317
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   318
    /* Create the sound buffers */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   319
    mixbuf = (Uint8 *) SDL_malloc(NUM_BUFFERS * spec->size);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   320
    if (mixbuf == NULL) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   321
        SDL_SetError("Out of memory");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   322
        return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   323
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   324
    for (i = 0; i < NUM_BUFFERS; ++i) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   325
        SDL_memset(&wavebuf[i], 0, sizeof(wavebuf[i]));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   326
        wavebuf[i].lpData = (LPSTR) & mixbuf[i * spec->size];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   327
        wavebuf[i].dwBufferLength = spec->size;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   328
        wavebuf[i].dwFlags = WHDR_DONE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   329
        result = waveOutPrepareHeader(sound, &wavebuf[i], sizeof(wavebuf[i]));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   330
        if (result != MMSYSERR_NOERROR) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   331
            SetMMerror("waveOutPrepareHeader()", result);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   332
            return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   333
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   334
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   335
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   336
    /* Ready to go! */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   337
    next_buffer = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   338
    return (0);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   339
}
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   340
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
   341
/* vi: set ts=4 sw=4 expandtab: */