Archipelago » qemu

/* public domain */

#include "qemu-common.h"

#define AUDIO_CAP "win-int"

#include <windows.h>

#include <mmsystem.h>

#include "audio.h"

#include "audio_int.h"

#include "audio_win_int.h"

int waveformat_from_audio_settings (WAVEFORMATEX *wfx,

                                    struct audsettings *as)

{

    memset (wfx, 0, sizeof (*wfx));

    wfx->wFormatTag = WAVE_FORMAT_PCM;

    wfx->nChannels = as->nchannels;

    wfx->nSamplesPerSec = as->freq;

    wfx->nAvgBytesPerSec = as->freq << (as->nchannels == 2);

    wfx->nBlockAlign = 1 << (as->nchannels == 2);

    wfx->cbSize = 0;

    switch (as->fmt) {

    case AUD_FMT_S8:

    case AUD_FMT_U8:

        wfx->wBitsPerSample = 8;

        break;

    case AUD_FMT_S16:

    case AUD_FMT_U16:

        wfx->wBitsPerSample = 16;

        wfx->nAvgBytesPerSec <<= 1;

        wfx->nBlockAlign <<= 1;

        break;

    case AUD_FMT_S32:

    case AUD_FMT_U32:

        wfx->wBitsPerSample = 32;

        wfx->nAvgBytesPerSec <<= 2;

        wfx->nBlockAlign <<= 2;

        break;

    default:

        dolog ("Internal logic error: Bad audio format %d\n", as->freq);

        return -1;

    }

    return 0;

}

int waveformat_to_audio_settings (WAVEFORMATEX *wfx,

                                  struct audsettings *as)

{

    if (wfx->wFormatTag != WAVE_FORMAT_PCM) {

        dolog ("Invalid wave format, tag is not PCM, but %d\n",

               wfx->wFormatTag);

        return -1;

    }

    if (!wfx->nSamplesPerSec) {

        dolog ("Invalid wave format, frequency is zero\n");

        return -1;

    }

    as->freq = wfx->nSamplesPerSec;

    switch (wfx->nChannels) {

    case 1:

        as->nchannels = 1;

        break;

    case 2:

        as->nchannels = 2;

        break;

    default:

        dolog (

            "Invalid wave format, number of channels is not 1 or 2, but %d\n",

            wfx->nChannels

            );

        return -1;

    }

    switch (wfx->wBitsPerSample) {

    case 8:

        as->fmt = AUD_FMT_U8;

        break;

    case 16:

        as->fmt = AUD_FMT_S16;

        break;

    case 32:

        as->fmt = AUD_FMT_S32;

        break;

    default:

        dolog ("Invalid wave format, bits per sample is not "

               "8, 16 or 32, but %d\n",

               wfx->wBitsPerSample);

        return -1;

    }

    return 0;

}