Beispiel #1
0
static int
WINMM_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
{
    SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
    int valid_datatype = 0;
    MMRESULT result;
    WAVEFORMATEX waveformat;
    UINT devId = WAVE_MAPPER;  /* WAVE_MAPPER == choose system's default */
    UINT i;

    if (handle != NULL) {  /* specific device requested? */
        /* -1 because we increment the original value to avoid NULL. */
        const size_t val = ((size_t) handle) - 1;
        devId = (UINT) val;
    }

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

    if (this->spec.channels > 2)
        this->spec.channels = 2;        /* !!! FIXME: is this right? */

    while ((!valid_datatype) && (test_format)) {
        switch (test_format) {
        case AUDIO_U8:
        case AUDIO_S16:
        case AUDIO_S32:
        case AUDIO_F32:
            this->spec.format = test_format;
            if (PrepWaveFormat(this, devId, &waveformat, iscapture)) {
                valid_datatype = 1;
            } else {
                test_format = SDL_NextAudioFormat();
            }
            break;

        default:
            test_format = SDL_NextAudioFormat();
            break;
        }
    }

    if (!valid_datatype) {
        WINMM_CloseDevice(this);
        return SDL_SetError("Unsupported audio format");
    }

    /* Update the fragment size as size in bytes */
    SDL_CalculateAudioSpec(&this->spec);

    /* Open the audio device */
    if (iscapture) {
        result = waveInOpen(&this->hidden->hin, devId, &waveformat,
                             (DWORD_PTR) CaptureSound, (DWORD_PTR) this,
                             CALLBACK_FUNCTION);
    } else {
        result = waveOutOpen(&this->hidden->hout, devId, &waveformat,
                             (DWORD_PTR) FillSound, (DWORD_PTR) this,
                             CALLBACK_FUNCTION);
    }

    if (result != MMSYSERR_NOERROR) {
        WINMM_CloseDevice(this);
        return SetMMerror("waveOutOpen()", result);
    }
#ifdef SOUND_DEBUG
    /* Check the sound device we retrieved */
    {
        WAVEOUTCAPS caps;

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

    /* Create the audio buffer semaphore */
    this->hidden->audio_sem =
        CreateSemaphore(NULL, NUM_BUFFERS - 1, NUM_BUFFERS, NULL);
    if (this->hidden->audio_sem == NULL) {
        WINMM_CloseDevice(this);
        return SDL_SetError("Couldn't create semaphore");
    }

    /* Create the sound buffers */
    this->hidden->mixbuf =
        (Uint8 *) SDL_malloc(NUM_BUFFERS * this->spec.size);
    if (this->hidden->mixbuf == NULL) {
        WINMM_CloseDevice(this);
        return SDL_OutOfMemory();
    }
    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->hout,
                                      &this->hidden->wavebuf[i],
                                      sizeof(this->hidden->wavebuf[i]));
        if (result != MMSYSERR_NOERROR) {
            WINMM_CloseDevice(this);
            return SetMMerror("waveOutPrepareHeader()", result);
        }
    }

    return 0;                   /* Ready to go! */
}
Beispiel #2
0
static int
WINMM_OpenDevice(_THIS, const char *devname, int iscapture)
{
    SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
    int valid_datatype = 0;
    MMRESULT result;
    WAVEFORMATEX waveformat;
    UINT_PTR devId = WAVE_MAPPER;  /* WAVE_MAPPER == choose system's default */
    char *utf8 = NULL;
    int i;

    if (devname != NULL) {  /* specific device requested? */
        if (iscapture) {
            const int devcount = (int) waveInGetNumDevs();
            WAVEINCAPS caps;
            for (i = 0; (i < devcount) && (devId == WAVE_MAPPER); i++) {
                result = waveInGetDevCaps(i, &caps, sizeof (caps));
                if (result != MMSYSERR_NOERROR)
                    continue;
                else if ((utf8 = WIN_StringToUTF8(caps.szPname)) == NULL)
                    continue;
                else if (SDL_strcmp(devname, utf8) == 0)
                    devId = (UINT_PTR) i;
                SDL_free(utf8);
            }
        } else {
            const int devcount = (int) waveOutGetNumDevs();
            WAVEOUTCAPS caps;
            for (i = 0; (i < devcount) && (devId == WAVE_MAPPER); i++) {
                result = waveOutGetDevCaps(i, &caps, sizeof (caps));
                if (result != MMSYSERR_NOERROR)
                    continue;
                else if ((utf8 = WIN_StringToUTF8(caps.szPname)) == NULL)
                    continue;
                else if (SDL_strcmp(devname, utf8) == 0)
                    devId = (UINT_PTR) i;
                SDL_free(utf8);
            }
        }

        if (devId == WAVE_MAPPER) {
            SDL_SetError("Requested device not found");
            return 0;
        }
    }

    /* 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) {
        WINMM_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 */
    if (iscapture) {
        result = waveInOpen(&this->hidden->hin, devId, &waveformat,
                             (DWORD_PTR) CaptureSound, (DWORD_PTR) this,
                             CALLBACK_FUNCTION);
    } else {
        result = waveOutOpen(&this->hidden->hout, devId, &waveformat,
                             (DWORD_PTR) FillSound, (DWORD_PTR) this,
                             CALLBACK_FUNCTION);
    }

    if (result != MMSYSERR_NOERROR) {
        WINMM_CloseDevice(this);
        SetMMerror("waveOutOpen()", result);
        return 0;
    }
#ifdef SOUND_DEBUG
    /* Check the sound device we retrieved */
    {
        WAVEOUTCAPS caps;

        result = waveOutGetDevCaps((UINT) this->hidden->hout,
                                   &caps, sizeof(caps));
        if (result != MMSYSERR_NOERROR) {
            WINMM_CloseDevice(this);
            SetMMerror("waveOutGetDevCaps()", result);
            return 0;
        }
        printf("Audio device: %s\n", caps.szPname);
    }
#endif

    /* Create the audio buffer semaphore */
    this->hidden->audio_sem =
        CreateSemaphore(NULL, NUM_BUFFERS - 1, NUM_BUFFERS, NULL);
    if (this->hidden->audio_sem == NULL) {
        WINMM_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 (this->hidden->mixbuf == NULL) {
        WINMM_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->hout,
                                      &this->hidden->wavebuf[i],
                                      sizeof(this->hidden->wavebuf[i]));
        if (result != MMSYSERR_NOERROR) {
            WINMM_CloseDevice(this);
            SetMMerror("waveOutPrepareHeader()", result);
            return 0;
        }
    }

    return 1;                   /* Ready to go! */
}