- add portaudio

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;
+}
+