/* HTS_Audio_open: open audio device */
static void HTS_Audio_open(HTS_Audio * audio, int sampling_rate, int max_buff_size)
{
if (audio->sampling_rate == sampling_rate && audio->max_buff_size == max_buff_size)
return;
HTS_Audio_close(audio);
audio->sampling_rate = sampling_rate;
audio->max_buff_size = max_buff_size;
if (audio->max_buff_size <= 0)
return;
audio->err = Pa_Initialize();
if (audio->err != paNoError)
HTS_error(0, "hts_engine: Failed to initialize your output audio device to play waveform.\n");
audio->parameters.device = Pa_GetDefaultOutputDevice();
audio->parameters.channelCount = 1;
audio->parameters.sampleFormat = paInt16;
audio->parameters.suggestedLatency = Pa_GetDeviceInfo(audio->parameters.device)->defaultLowOutputLatency;
audio->parameters.hostApiSpecificStreamInfo = NULL;
audio->err = Pa_OpenStream(&audio->stream, NULL, &audio->parameters, sampling_rate, max_buff_size, paClipOff, NULL, NULL);
if (audio->err != paNoError)
HTS_error(0, "hts_engine: Failed to open your output audio device to play waveform.\n");
audio->err = Pa_StartStream(audio->stream);
if (audio->err != paNoError)
HTS_error(0, "hts_engine: Failed to start your output audio device to play waveform.\n");
audio->buff = (short *) HTS_calloc(max_buff_size, sizeof(short));
audio->buff_size = 0;
}
/* HTS_Audio_open: open audio device */
static void HTS_Audio_open(HTS_Audio * audio, int sampling_rate, int max_buff_size)
{
MMRESULT error;
if (audio->sampling_rate == sampling_rate && audio->max_buff_size == max_buff_size)
return;
HTS_Audio_close(audio);
audio->sampling_rate = sampling_rate;
audio->max_buff_size = max_buff_size;
if (audio->max_buff_size <= 0)
return;
/* queue */
audio->which_buff = 1;
audio->now_buff_1 = FALSE;
audio->now_buff_2 = FALSE;
audio->buff = (short *) HTS_calloc(max_buff_size, sizeof(short));
/* format */
audio->waveformatex.wFormatTag = WAVE_FORMAT_PCM;
audio->waveformatex.nChannels = AUDIO_CHANNEL;
audio->waveformatex.nSamplesPerSec = sampling_rate;
audio->waveformatex.wBitsPerSample = sizeof(short) * 8;
audio->waveformatex.nBlockAlign = AUDIO_CHANNEL * audio->waveformatex.wBitsPerSample / 8;
audio->waveformatex.nAvgBytesPerSec = sampling_rate * audio->waveformatex.nBlockAlign;
/* open */
error = waveOutOpen(&audio->hwaveout, WAVE_MAPPER, &audio->waveformatex, (DWORD) HTS_Audio_callback_function, (DWORD) audio, CALLBACK_FUNCTION);
if (error != MMSYSERR_NOERROR)
HTS_error(0, "hts_engine: Failed to open your output audio device to play waveform.\n");
/* prepare */
audio->buff_1.lpData = (LPSTR) HTS_calloc(max_buff_size, sizeof(short));
audio->buff_1.dwBufferLength = max_buff_size * sizeof(short);
audio->buff_1.dwFlags = WHDR_BEGINLOOP | WHDR_ENDLOOP;
audio->buff_1.dwLoops = 1;
audio->buff_1.lpNext = 0;
audio->buff_1.reserved = 0;
error = waveOutPrepareHeader(audio->hwaveout, &(audio->buff_1), sizeof(WAVEHDR));
if (error != MMSYSERR_NOERROR)
HTS_error(0, "hts_engine: Cannot initialize audio datablocks to play waveform.\n");
audio->buff_2.lpData = (LPSTR) HTS_calloc(max_buff_size, sizeof(short));
audio->buff_2.dwBufferLength = max_buff_size * sizeof(short);
audio->buff_2.dwFlags = WHDR_BEGINLOOP | WHDR_ENDLOOP;
audio->buff_2.dwLoops = 1;
audio->buff_2.lpNext = 0;
audio->buff_2.reserved = 0;
error = waveOutPrepareHeader(audio->hwaveout, &(audio->buff_2), sizeof(WAVEHDR));
if (error != MMSYSERR_NOERROR)
HTS_error(0, "hts_engine: Cannot initialize audio datablocks to play waveform.\n");
}
/* HTS_Vocoder_clear: clear vocoder */
void HTS_Vocoder_clear(HTS_Vocoder *v)
{
if (v != NULL) {
/* free buffer */
if (v->freqt_buff != NULL) {
HTS_free(v->freqt_buff);
v->freqt_buff = NULL;
}
v->freqt_size = 0;
if (v->gc2gc_buff != NULL) {
HTS_free(v->gc2gc_buff);
v->gc2gc_buff = NULL;
}
v->gc2gc_size = 0;
if (v->lsp2lpc_buff != NULL) {
HTS_free(v->lsp2lpc_buff);
v->lsp2lpc_buff = NULL;
}
v->lsp2lpc_size = 0;
if (v->postfilter_buff != NULL) {
HTS_free(v->postfilter_buff);
v->postfilter_buff = NULL;
}
v->postfilter_size = 0;
if (v->spectrum2en_buff != NULL) {
HTS_free(v->spectrum2en_buff);
v->spectrum2en_buff = NULL;
}
v->spectrum2en_size = 0;
if (v->pade != NULL) {
HTS_free(v->pade);
v->pade = NULL;
}
if (v->c != NULL) {
HTS_free(v->c);
v->c = NULL;
}
/* close audio device */
if (v->audio != NULL) {
HTS_Audio_close(v->audio);
HTS_free(v->audio);
v->audio = NULL;
}
}
}
/* HTS_Audio_clear: free audio */
void HTS_Audio_clear(HTS_Audio * audio)
{
HTS_Audio_flush(audio);
HTS_Audio_close(audio);
}