108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
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/* public domain */
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#include "qemu-common.h"
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#define AUDIO_CAP "win-int"
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#include <windows.h>
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#include <mmsystem.h>
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#include "audio.h"
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#include "audio_int.h"
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#include "audio_win_int.h"
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int waveformat_from_audio_settings (WAVEFORMATEX *wfx,
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struct audsettings *as)
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{
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memset (wfx, 0, sizeof (*wfx));
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wfx->wFormatTag = WAVE_FORMAT_PCM;
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wfx->nChannels = as->nchannels;
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wfx->nSamplesPerSec = as->freq;
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wfx->nAvgBytesPerSec = as->freq << (as->nchannels == 2);
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wfx->nBlockAlign = 1 << (as->nchannels == 2);
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wfx->cbSize = 0;
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switch (as->fmt) {
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case AUD_FMT_S8:
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case AUD_FMT_U8:
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wfx->wBitsPerSample = 8;
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break;
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case AUD_FMT_S16:
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case AUD_FMT_U16:
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wfx->wBitsPerSample = 16;
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wfx->nAvgBytesPerSec <<= 1;
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wfx->nBlockAlign <<= 1;
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break;
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case AUD_FMT_S32:
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case AUD_FMT_U32:
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wfx->wBitsPerSample = 32;
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wfx->nAvgBytesPerSec <<= 2;
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wfx->nBlockAlign <<= 2;
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break;
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default:
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dolog ("Internal logic error: Bad audio format %d\n", as->freq);
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return -1;
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}
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return 0;
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}
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int waveformat_to_audio_settings (WAVEFORMATEX *wfx,
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struct audsettings *as)
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{
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if (wfx->wFormatTag != WAVE_FORMAT_PCM) {
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dolog ("Invalid wave format, tag is not PCM, but %d\n",
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wfx->wFormatTag);
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return -1;
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}
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if (!wfx->nSamplesPerSec) {
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dolog ("Invalid wave format, frequency is zero\n");
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return -1;
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}
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as->freq = wfx->nSamplesPerSec;
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switch (wfx->nChannels) {
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case 1:
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as->nchannels = 1;
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break;
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case 2:
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as->nchannels = 2;
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break;
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default:
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dolog (
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"Invalid wave format, number of channels is not 1 or 2, but %d\n",
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wfx->nChannels
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);
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return -1;
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}
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switch (wfx->wBitsPerSample) {
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case 8:
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as->fmt = AUD_FMT_U8;
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break;
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case 16:
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as->fmt = AUD_FMT_S16;
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break;
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case 32:
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as->fmt = AUD_FMT_S32;
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break;
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default:
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dolog ("Invalid wave format, bits per sample is not "
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"8, 16 or 32, but %d\n",
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wfx->wBitsPerSample);
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return -1;
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}
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return 0;
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}
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