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Diffstat (limited to 'src/lingot-audio-portaudio.c')
| -rw-r--r-- | src/lingot-audio-portaudio.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/src/lingot-audio-portaudio.c b/src/lingot-audio-portaudio.c new file mode 100644 index 0000000..d002672 --- /dev/null +++ b/src/lingot-audio-portaudio.c @@ -0,0 +1,155 @@ +/* + * 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; +} + |