mirror of
https://github.com/mackron/miniaudio.git
synced 2026-04-22 00:06:59 +02:00
Refactoring work on the null backend.
This commit is contained in:
David Reid
+192
-19
@@ -5899,12 +5899,16 @@ ma_result ma_device_stop__null(ma_device* pDevice)
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return MA_SUCCESS;
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}
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ma_result ma_device_write__null(ma_device* pDevice, const void* pPCMFrames, ma_uint32 frameCount)
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ma_result ma_device_write__null(ma_device* pDevice, const void* pPCMFrames, ma_uint32 frameCount, ma_uint32* pFramesWritten)
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{
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ma_result result = MA_SUCCESS;
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ma_uint32 totalPCMFramesProcessed;
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ma_bool32 wasStartedOnEntry;
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if (pFramesWritten != NULL) {
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*pFramesWritten = 0;
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}
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wasStartedOnEntry = pDevice->null_device.isStarted;
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/* Keep going until everything has been read. */
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@@ -5968,20 +5972,20 @@ ma_result ma_device_write__null(ma_device* pDevice, const void* pPCMFrames, ma_u
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pDevice->null_device.currentPeriodFramesRemainingPlayback = pDevice->playback.internalBufferSizeInFrames / pDevice->playback.internalPeriods;
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}
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if (pFramesWritten != NULL) {
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*pFramesWritten = totalPCMFramesProcessed;
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}
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return result;
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}
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ma_result ma_device_read__null(ma_device* pDevice, void* pPCMFrames, ma_uint32 frameCount)
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ma_result ma_device_read__null(ma_device* pDevice, void* pPCMFrames, ma_uint32 frameCount, ma_uint32* pFramesRead)
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{
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ma_result result = MA_SUCCESS;
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ma_uint32 totalPCMFramesProcessed;
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/* The device needs to be started immediately. */
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if (!pDevice->null_device.isStarted) {
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result = ma_device_start__null(pDevice);
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if (result != MA_SUCCESS) {
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return result;
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}
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if (pFramesRead != NULL) {
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*pFramesRead = 0;
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}
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/* Keep going until everything has been read. */
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@@ -6039,6 +6043,176 @@ ma_result ma_device_read__null(ma_device* pDevice, void* pPCMFrames, ma_uint32 f
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pDevice->null_device.currentPeriodFramesRemainingCapture = pDevice->capture.internalBufferSizeInFrames / pDevice->capture.internalPeriods;
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}
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if (pFramesRead != NULL) {
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*pFramesRead = totalPCMFramesProcessed;
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}
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return result;
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}
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ma_result ma_device_main_loop__null(ma_device* pDevice)
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{
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ma_result result = MA_SUCCESS;
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ma_bool32 exitLoop = MA_FALSE;
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ma_assert(pDevice != NULL);
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/* The capture device needs to be started immediately. */
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if (pDevice->type == ma_device_type_capture || pDevice->type == ma_device_type_duplex) {
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result = ma_device_start__null(pDevice);
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if (result != MA_SUCCESS) {
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return result;
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}
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}
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while (ma_device__get_state(pDevice) == MA_STATE_STARTED && !exitLoop) {
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switch (pDevice->type)
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{
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case ma_device_type_duplex:
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{
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/* The process is: device_read -> convert -> callback -> convert -> device_write */
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ma_uint8 capturedDeviceData[8192];
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ma_uint8 playbackDeviceData[8192];
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ma_uint32 capturedDeviceDataCapInFrames = sizeof(capturedDeviceData) / ma_get_bytes_per_frame(pDevice->capture.internalFormat, pDevice->capture.internalChannels);
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ma_uint32 playbackDeviceDataCapInFrames = sizeof(playbackDeviceData) / ma_get_bytes_per_frame(pDevice->playback.internalFormat, pDevice->playback.internalChannels);
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ma_uint32 totalFramesProcessed = 0;
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ma_uint32 periodSizeInFrames = ma_min(pDevice->capture.internalBufferSizeInFrames/pDevice->capture.internalPeriods, pDevice->playback.internalBufferSizeInFrames/pDevice->playback.internalPeriods);
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while (totalFramesProcessed < periodSizeInFrames) {
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ma_device_callback_proc onData;
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ma_uint32 framesRemaining = periodSizeInFrames - totalFramesProcessed;
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ma_uint32 framesProcessed;
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ma_uint32 framesToProcess = framesRemaining;
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if (framesToProcess > capturedDeviceDataCapInFrames) {
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framesToProcess = capturedDeviceDataCapInFrames;
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}
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result = ma_device_read__null(pDevice, capturedDeviceData, framesToProcess, &framesProcessed);
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if (result != MA_SUCCESS) {
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exitLoop = MA_TRUE;
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break;
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}
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onData = pDevice->onData;
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if (onData != NULL) {
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pDevice->capture._dspFrameCount = framesToProcess;
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pDevice->capture._dspFrames = capturedDeviceData;
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for (;;) {
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ma_uint8 capturedData[8192];
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ma_uint8 playbackData[8192];
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ma_uint32 capturedDataCapInFrames = sizeof(capturedData) / ma_get_bytes_per_frame(pDevice->capture.format, pDevice->capture.channels);
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ma_uint32 playbackDataCapInFrames = sizeof(playbackData) / ma_get_bytes_per_frame(pDevice->playback.format, pDevice->playback.channels);
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ma_uint32 capturedFramesToTryProcessing = ma_min(capturedDataCapInFrames, playbackDataCapInFrames);
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ma_uint32 capturedFramesToProcess = (ma_uint32)ma_pcm_converter_read(&pDevice->capture.converter, capturedData, capturedFramesToTryProcessing);
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if (capturedFramesToProcess == 0) {
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break; /* Don't fire the data callback with zero frames. */
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}
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onData(pDevice, playbackData, capturedData, capturedFramesToProcess);
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/* At this point the playbackData buffer should be holding data that needs to be written to the device. */
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pDevice->playback._dspFrameCount = capturedFramesToProcess;
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pDevice->playback._dspFrames = playbackData;
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for (;;) {
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ma_uint32 playbackDeviceFramesCount = (ma_uint32)ma_pcm_converter_read(&pDevice->playback.converter, playbackDeviceData, playbackDeviceDataCapInFrames);
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if (playbackDeviceFramesCount == 0) {
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break;
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}
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result = ma_device_write__null(pDevice, playbackDeviceData, playbackDeviceFramesCount, NULL);
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if (result != MA_SUCCESS) {
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exitLoop = MA_TRUE;
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break;
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}
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if (playbackDeviceFramesCount < playbackDeviceDataCapInFrames) {
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break;
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}
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}
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if (capturedFramesToProcess < capturedFramesToTryProcessing) {
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break;
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}
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/* In case an error happened from ma_device_write2__alsa()... */
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if (result != MA_SUCCESS) {
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exitLoop = MA_TRUE;
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break;
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}
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}
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}
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totalFramesProcessed += framesProcessed;
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}
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} break;
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case ma_device_type_capture:
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{
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/* We read in chunks of the period size, but use a stack allocated buffer for the intermediary. */
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ma_uint8 intermediaryBuffer[8192];
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ma_uint32 intermediaryBufferSizeInFrames = sizeof(intermediaryBuffer) / ma_get_bytes_per_frame(pDevice->capture.internalFormat, pDevice->capture.internalChannels);
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ma_uint32 periodSizeInFrames = pDevice->capture.internalBufferSizeInFrames / pDevice->capture.internalPeriods;
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ma_uint32 framesReadThisPeriod = 0;
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while (framesReadThisPeriod < periodSizeInFrames) {
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ma_uint32 framesRemainingInPeriod = periodSizeInFrames - framesReadThisPeriod;
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ma_uint32 framesProcessed;
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ma_uint32 framesToReadThisIteration = framesRemainingInPeriod;
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if (framesToReadThisIteration > intermediaryBufferSizeInFrames) {
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framesToReadThisIteration = intermediaryBufferSizeInFrames;
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}
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result = ma_device_read__null(pDevice, intermediaryBuffer, framesToReadThisIteration, &framesProcessed);
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if (result != MA_SUCCESS) {
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exitLoop = MA_TRUE;
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break;
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}
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ma_device__send_frames_to_client(pDevice, framesProcessed, intermediaryBuffer);
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framesReadThisPeriod += framesProcessed;
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}
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} break;
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case ma_device_type_playback:
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{
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/* We write in chunks of the period size, but use a stack allocated buffer for the intermediary. */
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ma_uint8 intermediaryBuffer[8192];
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ma_uint32 intermediaryBufferSizeInFrames = sizeof(intermediaryBuffer) / ma_get_bytes_per_frame(pDevice->playback.internalFormat, pDevice->playback.internalChannels);
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ma_uint32 periodSizeInFrames = pDevice->playback.internalBufferSizeInFrames / pDevice->playback.internalPeriods;
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ma_uint32 framesWrittenThisPeriod = 0;
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while (framesWrittenThisPeriod < periodSizeInFrames) {
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ma_uint32 framesRemainingInPeriod = periodSizeInFrames - framesWrittenThisPeriod;
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ma_uint32 framesProcessed;
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ma_uint32 framesToWriteThisIteration = framesRemainingInPeriod;
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if (framesToWriteThisIteration > intermediaryBufferSizeInFrames) {
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framesToWriteThisIteration = intermediaryBufferSizeInFrames;
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}
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ma_device__read_frames_from_client(pDevice, framesToWriteThisIteration, intermediaryBuffer);
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result = ma_device_write__null(pDevice, intermediaryBuffer, framesToWriteThisIteration, &framesProcessed);
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if (result != MA_SUCCESS) {
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exitLoop = MA_TRUE;
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break;
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}
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framesWrittenThisPeriod += framesProcessed;
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}
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} break;
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/* To silence a warning. Will never hit this. */
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case ma_device_type_loopback:
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default: break;
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}
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}
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/* Here is where the device is started. */
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ma_device_stop__null(pDevice);
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return result;
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}
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@@ -6057,16 +6231,15 @@ ma_result ma_context_init__null(const ma_context_config* pConfig, ma_context* pC
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(void)pConfig;
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pContext->onUninit = ma_context_uninit__null;
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pContext->onDeviceIDEqual = ma_context_is_device_id_equal__null;
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pContext->onEnumDevices = ma_context_enumerate_devices__null;
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pContext->onGetDeviceInfo = ma_context_get_device_info__null;
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pContext->onDeviceInit = ma_device_init__null;
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pContext->onDeviceUninit = ma_device_uninit__null;
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pContext->onDeviceStart = ma_device_start__null;
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pContext->onDeviceStop = ma_device_stop__null;
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pContext->onDeviceWrite = ma_device_write__null;
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pContext->onDeviceRead = ma_device_read__null;
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pContext->onUninit = ma_context_uninit__null;
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pContext->onDeviceIDEqual = ma_context_is_device_id_equal__null;
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pContext->onEnumDevices = ma_context_enumerate_devices__null;
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pContext->onGetDeviceInfo = ma_context_get_device_info__null;
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pContext->onDeviceInit = ma_device_init__null;
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pContext->onDeviceUninit = ma_device_uninit__null;
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pContext->onDeviceStart = NULL; /* Not required for synchronous backends. */
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pContext->onDeviceStop = NULL; /* Not required for synchronous backends. */
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pContext->onDeviceMainLoop = ma_device_main_loop__null;
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/* The null backend always works. */
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return MA_SUCCESS;
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@@ -34438,7 +34611,7 @@ v0.9.7 - 2019-xx-xx
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- Fix a crash when an error is posted in ma_device_init().
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- Fix a compilation error when compiling for ARM architectures.
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- Fix a bug with the audio(4) backend where the device is incorrectly being opened in non-blocking mode.
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- Minor refactoring to the WinMM, ALSA, PulseAudio, OSS, audio(4) and sndio backends.
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- Minor refactoring to the WinMM, ALSA, PulseAudio, OSS, audio(4), sndio and null backends.
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v0.9.6 - 2019-08-04
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- Add support for loading decoders using a wchar_t string for file paths.
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