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Initial working implementation of full-duplex on WASAPI.

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This commit is contained in:
David Reid
2019-02-09 17:39:49 +10:00
parent 934c7d5e63
commit 32c64703dd
5 changed files with 303 additions and 151 deletions
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examples/simple_capture.c
+45 -79
View File
@@ -1,106 +1,72 @@
// This example simply captures data from your default microphone until you press Enter, after
// which it plays back the captured audio.
// This example simply captures data from your default microphone until you press Enter. The output is saved to the file specified on the command line.
#define MINI_AL_IMPLEMENTATION
#include "../mini_al.h"
#define DR_WAV_IMPLEMENTATION
#include "../extras/dr_wav.h"
#include <stdlib.h>
#include <stdio.h>
mal_uint32 capturedSampleCount = 0;
mal_int16* pCapturedSamples = NULL;
mal_uint32 playbackSample = 0;
void on_recv_frames(mal_device* pDevice, void* pOutput, const void* pInput, mal_uint32 frameCount)
void data_callback(mal_device* pDevice, void* pOutput, const void* pInput, mal_uint32 frameCount)
{
mal_uint32 sampleCount = frameCount * pDevice->channels;
mal_uint32 newCapturedSampleCount = capturedSampleCount + sampleCount;
mal_int16* pNewCapturedSamples = (mal_int16*)realloc(pCapturedSamples, newCapturedSampleCount * sizeof(mal_int16));
if (pNewCapturedSamples == NULL) {
return;
}
memcpy(pNewCapturedSamples + capturedSampleCount, pInput, sampleCount * sizeof(mal_int16));
pCapturedSamples = pNewCapturedSamples;
capturedSampleCount = newCapturedSampleCount;
(void)pOutput;
drwav* pWav = (drwav*)pDevice->pUserData;
mal_assert(pWav != NULL);
drwav_write_pcm_frames(pWav, frameCount, pInput);
}
void on_send_frames(mal_device* pDevice, void* pOutput, const void* pInput, mal_uint32 frameCount)
int main(int argc, char** argv)
{
mal_uint32 samplesToRead = frameCount * pDevice->channels;
if (samplesToRead > capturedSampleCount-playbackSample) {
samplesToRead = capturedSampleCount-playbackSample;
}
if (samplesToRead == 0) {
return;
}
memcpy(pOutput, pCapturedSamples + playbackSample, samplesToRead * sizeof(mal_int16));
playbackSample += samplesToRead;
(void)pInput;
}
int main()
{
mal_device_config config;
mal_context context;
if (mal_context_init(NULL, 0, NULL, &context) != MAL_SUCCESS) {
printf("Failed to initialize context.");
if (argc < 2) {
printf("No input file.\n");
return -1;
}
printf("Recording...\n");
config = mal_device_config_init(mal_format_s16, 2, 48000, on_recv_frames, NULL);
mal_device captureDevice;
if (mal_device_init(&context, mal_device_type_capture, NULL, &config, &captureDevice) != MAL_SUCCESS) {
mal_context_uninit(&context);
mal_result result;
drwav_data_format wavFormat;
wavFormat.container = drwav_container_riff;
wavFormat.format = DR_WAVE_FORMAT_IEEE_FLOAT;
wavFormat.channels = 2;
wavFormat.sampleRate = 44100;
wavFormat.bitsPerSample = 32;
drwav wav;
if (drwav_init_file_write(&wav, argv[1], &wavFormat) == DRWAV_FALSE) {
printf("Failed to initialize output file.\n");
return -1;
}
mal_device_config config = mal_device_config_init(mal_device_type_capture);
config.capture.format = mal_format_f32;
config.capture.channels = wavFormat.channels;
config.sampleRate = wavFormat.sampleRate;
config.dataCallback = data_callback;
config.pUserData = &wav;
mal_device device;
result = mal_device_init(NULL, &config, &device);
if (result != MAL_SUCCESS) {
printf("Failed to initialize capture device.\n");
return -2;
}
if (mal_device_start(&captureDevice) != MAL_SUCCESS) {
mal_device_uninit(&captureDevice);
mal_context_uninit(&context);
printf("Failed to start capture device.\n");
result = mal_device_start(&device);
if (result != MAL_SUCCESS) {
mal_device_uninit(&device);
printf("Failed to start device.\n");
return -3;
}
printf("Press Enter to stop recording...\n");
getchar();
mal_device_uninit(&device);
drwav_uninit(&wav);
mal_device_uninit(&captureDevice);
printf("Playing...\n");
config = mal_device_config_init(mal_format_s16, 2, 48000, on_send_frames, NULL);
mal_device playbackDevice;
if (mal_device_init(&context, mal_device_type_playback, NULL, &config, &playbackDevice) != MAL_SUCCESS) {
mal_context_uninit(&context);
printf("Failed to initialize playback device.\n");
return -4;
}
if (mal_device_start(&playbackDevice) != MAL_SUCCESS) {
mal_device_uninit(&playbackDevice);
mal_context_uninit(&context);
printf("Failed to start playback device.\n");
return -5;
}
printf("Press Enter to quit...\n");
getchar();
mal_device_uninit(&playbackDevice);
mal_context_uninit(&context);
return 0;
}