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/*
* lingot, a musical instrument tuner.
*
* Copyright (C) 2004-2011 Ibán Cereijo Graña, Jairo Chapela Martínez.
*
* This file is part of lingot.
*
* lingot is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* lingot is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with lingot; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include "lingot-defs.h"
#include "lingot-audio-portaudio.h"
#include "lingot-i18n.h"
#include "lingot-msg.h"
#include <string.h>
LingotAudioHandler* lingot_audio_portaudio_new(char* device, int sample_rate) {
LingotAudioHandler* audio = NULL;
# ifdef PORTAUDIO
char error_message[1000];
PaError err;
const char* exception;
int channels = 1;
const PaStreamInfo* s_info;
PaDeviceIndex dev_idx_default;
const PaDeviceInfo* dev_info;
audio = malloc(sizeof(LingotAudioHandler));
audio->read_buffer = NULL;
audio->audio_system = AUDIO_SYSTEM_PORTAUDIO;
audio->read_buffer_size = 128;
try {
if ((err = Pa_Initialize()) != paNoError)
{
sprintf(error_message, "Pa_Initialize error: %s\n",
Pa_GetErrorText(err));
throw(error_message);
}
dev_idx_default = Pa_GetDefaultInputDevice();
dev_info = Pa_GetDeviceInfo(dev_idx_default);
strcpy(audio->device, dev_info->name);
if ((err = Pa_OpenDefaultStream( &audio->portaudio_stream, channels, 0, paInt16, sample_rate,
audio->read_buffer_size, NULL,
NULL)) != paNoError)
{
sprintf(error_message, "Pa_OpenDefaultStream error: %s\n",
Pa_GetErrorText(err));
throw(error_message);
}
if ((err = Pa_StartStream(audio->portaudio_stream)) != paNoError)
{
sprintf(error_message, "Pa_StartStream error: %s\n",
Pa_GetErrorText(err));
throw(error_message);
}
s_info = Pa_GetStreamInfo(audio->portaudio_stream);
audio->real_sample_rate = s_info->sampleRate;
audio->read_buffer = malloc(channels * audio->read_buffer_size
* Pa_GetSampleSize(paInt16));
memset(audio->read_buffer, 0, audio->read_buffer_size
* Pa_GetSampleSize(paInt16));
} catch {
if (audio->portaudio_stream != NULL)
Pa_CloseStream(audio->portaudio_stream);
free(audio);
audio = NULL;
lingot_msg_add_error(exception);
}
# else
lingot_msg_add_error(
_("The application has not been built with PORTAUDIO support"));
# endif
return audio;
}
void lingot_audio_portaudio_destroy(LingotAudioHandler* audio) {
# ifdef PORTAUDIO
if (audio != NULL) {
Pa_CloseStream(audio->portaudio_stream);
free(audio->read_buffer);
}
# endif
}
int lingot_audio_portaudio_read(LingotAudioHandler* audio) {
# ifdef PORTAUDIO
PaError err;
int i;
if (((err = Pa_ReadStream(audio->portaudio_stream, audio->read_buffer,
audio->read_buffer_size)) != paNoError) && (err != paInputOverflowed))
{
char buff[100];
sprintf(buff, _("Read from audio interface failed.\n%s."),
Pa_GetErrorText(err));
lingot_msg_add_error(buff);
return -1;
}
// float point conversion
for (i = 0; i < audio->read_buffer_size; i++) {
audio->flt_read_buffer[i] = audio->read_buffer[i];
}
# endif
return 0;
}
LingotAudioSystemProperties* lingot_audio_portaudio_get_audio_system_properties(
audio_system_t audio_system) {
LingotAudioSystemProperties* result =
(LingotAudioSystemProperties*) malloc(1
* sizeof(LingotAudioSystemProperties));
// TODO
result->forced_sample_rate = 0;
result->n_devices = 0;
result->devices = NULL;
result->n_sample_rates = 5;
result->sample_rates = malloc(result->n_sample_rates * sizeof(int));
result->sample_rates[0] = 8000;
result->sample_rates[1] = 11025;
result->sample_rates[2] = 22050;
result->sample_rates[3] = 44100;
result->sample_rates[4] = 48000;
return result;
}
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