mirror of
https://github.com/mackron/miniaudio.git
synced 2026-04-22 08:14:04 +02:00
WinMM: Simplify format selection.
This commit is contained in:
David Reid
@@ -5607,11 +5607,6 @@ static mal_result mal_device_init__winmm(mal_context* pContext, mal_device_type
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(void)pContext;
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mal_uint32 heapSize;
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mal_uint32 iBit;
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WORD closestBitsPerSample = 0;
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WORD closestChannels = 0;
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DWORD closestSampleRate = 0;
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mal_assert(pDevice != NULL);
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mal_zero_object(&pDevice->winmm);
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@@ -5663,10 +5658,12 @@ static mal_result mal_device_init__winmm(mal_context* pContext, mal_device_type
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// Change the format based on the closest match of the supported standard formats.
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DWORD dwFormats = 0;
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WORD wChannels = 0;
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if (type == mal_device_type_playback) {
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WAVEOUTCAPSA caps;
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if (((MAL_PFN_waveOutGetDevCapsA)pContext->winmm.waveOutGetDevCapsA)(winMMDeviceID, &caps, sizeof(caps)) == MMSYSERR_NOERROR) {
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dwFormats = caps.dwFormats;
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wChannels = caps.wChannels;
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} else {
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errorMsg = "[WinMM] Failed to retrieve internal device caps.", errorCode = MAL_WINMM_FAILED_TO_GET_DEVICE_CAPS;
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goto on_error;
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@@ -5675,6 +5672,7 @@ static mal_result mal_device_init__winmm(mal_context* pContext, mal_device_type
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WAVEINCAPSA caps;
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if (((MAL_PFN_waveInGetDevCapsA)pContext->winmm.waveInGetDevCapsA)(winMMDeviceID, &caps, sizeof(caps)) == MMSYSERR_NOERROR) {
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dwFormats = caps.dwFormats;
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wChannels = caps.wChannels;
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} else {
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errorMsg = "[WinMM] Failed to retrieve internal device caps.", errorCode = MAL_WINMM_FAILED_TO_GET_DEVICE_CAPS;
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goto on_error;
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@@ -5686,187 +5684,68 @@ static mal_result mal_device_init__winmm(mal_context* pContext, mal_device_type
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goto on_error;
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}
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for (iBit = 0; iBit < 32; ++iBit) {
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WORD formatBitsPerSample = 0;
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WORD formatChannels = 0;
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DWORD formatSampleRate = 0;
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DWORD format = (dwFormats & (1 << iBit));
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if (format != 0) {
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switch (format)
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{
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case WAVE_FORMAT_1M08:
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{
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formatBitsPerSample = 8;
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formatChannels = 1;
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formatSampleRate = 110025;
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} break;
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case WAVE_FORMAT_1M16:
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{
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formatBitsPerSample = 16;
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formatChannels = 1;
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formatSampleRate = 110025;
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} break;
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case WAVE_FORMAT_1S08:
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{
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formatBitsPerSample = 8;
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formatChannels = 2;
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formatSampleRate = 110025;
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} break;
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case WAVE_FORMAT_1S16:
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{
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formatBitsPerSample = 16;
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formatChannels = 2;
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formatSampleRate = 110025;
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} break;
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case WAVE_FORMAT_2M08:
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{
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formatBitsPerSample = 8;
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formatChannels = 1;
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formatSampleRate = 22050;
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} break;
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case WAVE_FORMAT_2M16:
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{
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formatBitsPerSample = 16;
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formatChannels = 1;
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formatSampleRate = 22050;
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} break;
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case WAVE_FORMAT_2S08:
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{
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formatBitsPerSample = 8;
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formatChannels = 2;
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formatSampleRate = 22050;
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} break;
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case WAVE_FORMAT_2S16:
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{
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formatBitsPerSample = 16;
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formatChannels = 2;
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formatSampleRate = 22050;
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} break;
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case WAVE_FORMAT_44M08:
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{
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formatBitsPerSample = 8;
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formatChannels = 1;
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formatSampleRate = 44100;
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} break;
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case WAVE_FORMAT_44M16:
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{
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formatBitsPerSample = 16;
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formatChannels = 1;
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formatSampleRate = 44100;
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} break;
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case WAVE_FORMAT_44S08:
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{
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formatBitsPerSample = 8;
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formatChannels = 2;
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formatSampleRate = 44100;
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} break;
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case WAVE_FORMAT_44S16:
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{
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formatBitsPerSample = 16;
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formatChannels = 2;
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formatSampleRate = 44100;
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} break;
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case WAVE_FORMAT_48M08:
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{
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formatBitsPerSample = 8;
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formatChannels = 1;
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formatSampleRate = 48000;
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} break;
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case WAVE_FORMAT_48M16:
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{
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formatBitsPerSample = 16;
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formatChannels = 1;
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formatSampleRate = 48000;
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} break;
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case WAVE_FORMAT_48S08:
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{
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formatBitsPerSample = 8;
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formatChannels = 2;
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formatSampleRate = 48000;
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} break;
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case WAVE_FORMAT_48S16:
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{
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formatBitsPerSample = 16;
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formatChannels = 2;
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formatSampleRate = 48000;
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} break;
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case WAVE_FORMAT_96M08:
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{
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formatBitsPerSample = 8;
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formatChannels = 1;
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formatSampleRate = 96000;
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} break;
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case WAVE_FORMAT_96M16:
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{
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formatBitsPerSample = 16;
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formatChannels = 1;
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formatSampleRate = 96000;
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} break;
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case WAVE_FORMAT_96S08:
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{
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formatBitsPerSample = 8;
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formatChannels = 2;
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formatSampleRate = 96000;
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} break;
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case WAVE_FORMAT_96S16:
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{
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formatBitsPerSample = 16;
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formatChannels = 2;
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formatSampleRate = 96000;
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} break;
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default:
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{
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errorMsg = "[WinMM] The internal device does not support any of the standard formats.", errorCode = MAL_ERROR; // <-- Should never hit this.
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goto on_error;
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} break;
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}
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if (formatBitsPerSample == wf.wBitsPerSample && formatChannels == wf.nChannels && formatSampleRate == wf.nSamplesPerSec) {
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break; // It's an exact match.
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if (wChannels == 1) {
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wf.nChannels = 1;
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wf.wBitsPerSample = 16;
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if ((dwFormats & WAVE_FORMAT_48M16) != 0) {
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wf.nSamplesPerSec = 48000;
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} else if ((dwFormats & WAVE_FORMAT_44M16) != 0) {
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wf.nSamplesPerSec = 44100;
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} else if ((dwFormats & WAVE_FORMAT_2M16) != 0) {
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wf.nSamplesPerSec = 22050;
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} else if ((dwFormats & WAVE_FORMAT_1M16) != 0) {
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wf.nSamplesPerSec = 11025;
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} else if ((dwFormats & WAVE_FORMAT_96M16) != 0) {
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wf.nSamplesPerSec = 96000;
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} else {
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wf.wBitsPerSample = 8;
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if ((dwFormats & WAVE_FORMAT_48M08) != 0) {
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wf.nSamplesPerSec = 48000;
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} else if ((dwFormats & WAVE_FORMAT_44M08) != 0) {
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wf.nSamplesPerSec = 44100;
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} else if ((dwFormats & WAVE_FORMAT_2M08) != 0) {
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wf.nSamplesPerSec = 22050;
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} else if ((dwFormats & WAVE_FORMAT_1M08) != 0) {
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wf.nSamplesPerSec = 11025;
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} else if ((dwFormats & WAVE_FORMAT_96M08) != 0) {
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wf.nSamplesPerSec = 96000;
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} else {
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// It's not an exact match. Compare it with the closest match.
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if (closestBitsPerSample == 0) {
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// This is the first format, so nothing to compare against.
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closestBitsPerSample = formatBitsPerSample;
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closestChannels = formatChannels;
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closestSampleRate = formatSampleRate;
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} else {
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// Prefer the channel count be the same over the others.
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if (formatChannels != closestChannels) {
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// Channels aren't equal. Favour the one equal to our desired channel count.
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if (formatChannels == wf.nChannels) {
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closestBitsPerSample = formatBitsPerSample;
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closestChannels = formatChannels;
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closestSampleRate = formatSampleRate;
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}
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} else {
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// The channels are equal. Look at the format now.
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if (formatBitsPerSample != closestBitsPerSample) {
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if (formatBitsPerSample == wf.wBitsPerSample) {
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closestBitsPerSample = formatBitsPerSample;
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closestChannels = formatChannels;
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closestSampleRate = formatSampleRate;
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}
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} else {
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// Both the channels and formats are the same, so now just favour whichever's sample rate is closest to the requested rate.
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mal_uint32 closestRateDiff = (closestSampleRate > wf.nSamplesPerSec) ? (closestSampleRate - wf.nSamplesPerSec) : (wf.nSamplesPerSec - closestSampleRate);
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mal_uint32 formatRateDiff = (formatSampleRate > wf.nSamplesPerSec) ? (formatSampleRate - wf.nSamplesPerSec) : (wf.nSamplesPerSec - formatSampleRate);
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if (formatRateDiff < closestRateDiff) {
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closestBitsPerSample = formatBitsPerSample;
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closestChannels = formatChannels;
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closestSampleRate = formatSampleRate;
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}
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}
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}
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}
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errorMsg = "[WinMM] Could not find appropriate format for internal device.", errorCode = MAL_FORMAT_NOT_SUPPORTED;
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goto on_error;
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}
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}
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} else {
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wf.nChannels = 2;
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wf.wBitsPerSample = 16;
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if ((dwFormats & WAVE_FORMAT_48S16) != 0) {
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wf.nSamplesPerSec = 48000;
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} else if ((dwFormats & WAVE_FORMAT_44S16) != 0) {
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wf.nSamplesPerSec = 44100;
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} else if ((dwFormats & WAVE_FORMAT_2S16) != 0) {
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wf.nSamplesPerSec = 22050;
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} else if ((dwFormats & WAVE_FORMAT_1S16) != 0) {
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wf.nSamplesPerSec = 11025;
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} else if ((dwFormats & WAVE_FORMAT_96S16) != 0) {
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wf.nSamplesPerSec = 96000;
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} else {
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wf.wBitsPerSample = 8;
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if ((dwFormats & WAVE_FORMAT_48S08) != 0) {
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wf.nSamplesPerSec = 48000;
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} else if ((dwFormats & WAVE_FORMAT_44S08) != 0) {
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wf.nSamplesPerSec = 44100;
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} else if ((dwFormats & WAVE_FORMAT_2S08) != 0) {
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wf.nSamplesPerSec = 22050;
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} else if ((dwFormats & WAVE_FORMAT_1S08) != 0) {
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wf.nSamplesPerSec = 11025;
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} else if ((dwFormats & WAVE_FORMAT_96S08) != 0) {
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wf.nSamplesPerSec = 96000;
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} else {
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errorMsg = "[WinMM] Could not find appropriate format for internal device.", errorCode = MAL_FORMAT_NOT_SUPPORTED;
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goto on_error;
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}
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}
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}
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wf.wBitsPerSample = closestBitsPerSample;
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wf.nChannels = closestChannels;
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wf.nSamplesPerSec = closestSampleRate;
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wf.nBlockAlign = (wf.nChannels * wf.wBitsPerSample) / 8;
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wf.nAvgBytesPerSec = wf.nBlockAlign * wf.nSamplesPerSec;
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