- import version 0.9.1 from upstream

1 files changed, 123 insertions, 0 deletions

diff --git a/src/lingot-config.h b/src/lingot-config.h
new file mode 100644
index 0000000..157baa6
--- /dev/null
+++ b/src/lingot-config.h
@@ -0,0 +1,123 @@
+/*
+ * 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
+ */
+
+#ifndef __LINGOT_CONFIG_H__
+#define __LINGOT_CONFIG_H__
+
+#include "lingot-defs.h"
+#include "lingot-config-scale.h"
+
+typedef enum audio_system_t {
+	AUDIO_SYSTEM_OSS = 0, AUDIO_SYSTEM_ALSA = 1, AUDIO_SYSTEM_JACK = 2
+} audio_system_t;
+
+typedef enum window_type_t {
+	NONE = 0, RECTANGULAR = 1, HANNING = 2, HAMMING = 3
+} window_type_t;
+
+
+typedef struct _LingotConfig LingotConfig;
+
+// Configuration struct. Determines the tuner behaviour.
+// Some parameters are internal only.
+struct _LingotConfig {
+
+	audio_system_t audio_system;
+
+	char audio_dev[3][80];
+	int sample_rate; // soundcard sample rate.
+	unsigned int oversampling; // oversampling factor.
+
+	//	root_frequency_reference_note_t root_frequency_referente_note;
+	FLT root_frequency_error; // deviation of the above root frequency.
+
+	FLT min_frequency; // minimum valid frequency.
+
+	unsigned int fft_size; // number of samples of the FFT.
+
+	FLT calculation_rate;
+	FLT visualization_rate;
+
+	FLT temporal_window; // duration in seconds of the temporal window.
+
+	// samples stored in the temporal window (internal parameter).
+	unsigned int temporal_buffer_size;
+
+	FLT noise_threshold_db; // dB
+	FLT noise_threshold_nu; // natural units (internal parameter)
+
+	window_type_t window_type;
+
+	// frequency finding algorithm configuration
+	//-------------------------------------------
+
+	unsigned int peak_number; // number of maximum peaks considered.
+
+	// number of adjacent samples needed to consider a peak.
+	unsigned int peak_half_width;
+
+	/* maximum amplitude relation between principal and secondary peaks.
+	 The max peak doesn't has to be the fundamental frequency carrier if it
+	 has an amplitude relation with the fundamental considered peak lower than
+	 this parameter. */
+	FLT peak_rejection_relation_db; // dBs
+	FLT peak_rejection_relation_nu; // natural units (internal)
+
+	FLT gain; // dBs
+	FLT gain_nu; // natural units (internal)
+
+	// DFT approximation
+	unsigned int dft_number; // number of DFTs.
+	unsigned int dft_size; // samples of each DFT.
+
+	// max iterations for Newton-Raphson algorithm.
+	unsigned int max_nr_iter;
+
+	//----------------------------------------------------------------------------
+
+	// gauge rest value. (gauge contemplates [-0.5, 0.5])
+	FLT gauge_rest_value;
+
+	//----------------------------------------------------------------------------
+
+	LingotScale* scale;
+};
+
+// converts an audio_system_t to a string
+const char* audio_system_t_to_str(audio_system_t audio_system);
+// converts a string to an audio_system_t
+audio_system_t str_to_audio_system_t(char* audio_system);
+
+LingotConfig* lingot_config_new();
+void lingot_config_destroy(LingotConfig*);
+void lingot_config_copy(LingotConfig* dst, LingotConfig* src);
+
+// back to default configuration.
+void lingot_config_restore_default_values(LingotConfig*);
+
+// derivate internal parameters from external ones.
+void lingot_config_update_internal_params(LingotConfig*);
+
+void lingot_config_save(LingotConfig*, char* filename);
+void lingot_config_load(LingotConfig*, char* filename);
+
+#endif // __LINGOT_CONFIG_H__