// Given the capture hardware is working, fill a buffer with some data. This call is
// asynchronous. When this buffer is filled, the function done will be called.
// returns 0 for success, -1 for failure
int HAE_StartAudioCapture(HAE_CaptureDone done, void *callbackContext)
{
long error = -1;
//fprintf(stderr, ">> HAE_API_LinuxOS_Capture: HAE_StartAudioCapture()\n");
if (g_waveDevice && g_openForCapture) {
// start capture
g_captureDoneProc = done;
// allocate the capture buffer
// $$jb: 05.19.99: This is set in HAE_AquireAudioCapture
//g_audioFramesToRead = HAE_LINUX_FRAMES_PER_BUFFER; // our read buffer will hold this many frames of sampled audio data
// we're going to build this many buffers at a time
if (g_bitSize == 8) {
g_captureByteBufferSize = (sizeof(char) * g_audioFramesToRead);
} else {
g_captureByteBufferSize = (sizeof(short int) * g_audioFramesToRead);
}
g_captureByteBufferSize *= g_channels;
// allocate read buffer
g_captureBufferBlock = HAE_Allocate(g_captureByteBufferSize);
if (g_captureBufferBlock) {
// $$kk: 10.12.98: added this so we can restart capture
// $$kk: 11.03.98: mark ourselves active *before* creating frame thread
g_captureShutdown = FALSE;
// create thread to manage audio capture
error = HAE_CreateFrameThread(callbackContext, PV_AudioWaveInFrameThread);
if (error == 0) {
error = HAE_ResumeAudioCapture();
}
}
if (error != 0) {
g_captureShutdown = TRUE;
}
}
//fprintf(stderr, "<< HAE_API_LinuxOS_Capture: HAE_StartAudioCapture() returning %d\n", error);
return (error == 0) ? 0 : -1;
}
// Given the capture hardware is working, fill a buffer with some data. This call is
// asynchronous. When this buffer is filled, the function done will be called.
// returns 0 for success, -1 for failure
int HAE_StartAudioCapture(HAE_CaptureDone done, void *callbackContext) {
long error = 0;
int i;
// start capture
g_captureDoneProc = done;
g_captureDoneContext = callbackContext;
// calculate the number of bytes per capture buffer
if (g_bitSize == 8) {
g_audioBytesPerBuffer = (sizeof(char) * g_audioFramesPerBuffer);
} else {
g_audioBytesPerBuffer = (sizeof(short int) * g_audioFramesPerBuffer);
}
g_audioBytesPerBuffer *= g_channels;
// allocate the capture data buffers
// this could really be done in initialiation...?
for (i = 0; i < HAE_WAVEIN_NUM_BUFFERS; i++) {
g_audioBufferBlock[i] = HAE_Allocate(g_audioBytesPerBuffer);
if (g_audioBufferBlock[i] == NULL) {
error = -1; // something is wrong
break;
}
} // for
if (error == 0) {
// create thread to manage audio capture
error = HAE_CreateFrameThread(callbackContext, PV_AudioWaveInFrameThread);
if (error == 0) {
error = HAE_ResumeAudioCapture();
}
}
if (error == 0) {
// $$kk: 10.12.98: added this so we can restart capture
g_captureShutdown = FALSE;
}
return (error == 0) ? 0 : -1;
}
