/* GStreamer

 * Copyright (C) 2005 Stefan Kost <ensonic@users.sf.net>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library 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

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

#ifndef __GST_AUDIO_TEST_SRC_H__

#define __GST_AUDIO_TEST_SRC_H__

#include <gst/gst.h>

#include <gst/base/gstbasesrc.h>

#include <gst/audio/audio.h>

G_BEGIN_DECLS

#define GST_TYPE_AUDIO_TEST_SRC \

  (gst_audio_test_src_get_type())

#define GST_AUDIO_TEST_SRC(obj) \

  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_TEST_SRC,GstAudioTestSrc))

#define GST_AUDIO_TEST_SRC_CLASS(klass) \

  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIO_TEST_SRC,GstAudioTestSrcClass))

#define GST_IS_AUDIO_TEST_SRC(obj) \

  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_TEST_SRC))

#define GST_IS_AUDIO_TEST_SRC_CLASS(klass) \

  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_TEST_SRC))

/**

 * GstAudioTestSrcWave:

 * @GST_AUDIO_TEST_SRC_WAVE_SINE: a sine wave

 * @GST_AUDIO_TEST_SRC_WAVE_SQUARE: a square wave

 * @GST_AUDIO_TEST_SRC_WAVE_SAW: a saw wave

 * @GST_AUDIO_TEST_SRC_WAVE_TRIANGLE: a tringle wave

 * @GST_AUDIO_TEST_SRC_WAVE_SILENCE: silence

 * @GST_AUDIO_TEST_SRC_WAVE_WHITE_NOISE: white uniform noise

 * @GST_AUDIO_TEST_SRC_WAVE_PINK_NOISE: pink noise

 * @GST_AUDIO_TEST_SRC_WAVE_SINE_TAB: sine wave using a table

 * @GST_AUDIO_TEST_SRC_WAVE_TICKS: periodic ticks

 * @GST_AUDIO_TEST_SRC_WAVE_GAUSSIAN_WHITE_NOISE: white (zero mean) Gaussian noise

 * @GST_AUDIO_TEST_SRC_WAVE_RED_NOISE: red (brownian) noise

 * @GST_AUDIO_TEST_SRC_WAVE_BLUE_NOISE: spectraly inverted pink noise

 * @GST_AUDIO_TEST_SRC_WAVE_VIOLET_NOISE: spectraly inverted red (brownian) noise

 *

 * Different types of supported sound waves.

 */

typedef enum {

  GST_AUDIO_TEST_SRC_WAVE_SINE,

  GST_AUDIO_TEST_SRC_WAVE_SQUARE,

  GST_AUDIO_TEST_SRC_WAVE_SAW,

  GST_AUDIO_TEST_SRC_WAVE_TRIANGLE,

  GST_AUDIO_TEST_SRC_WAVE_SILENCE,

  GST_AUDIO_TEST_SRC_WAVE_WHITE_NOISE,

  GST_AUDIO_TEST_SRC_WAVE_PINK_NOISE,

  GST_AUDIO_TEST_SRC_WAVE_SINE_TAB,

  GST_AUDIO_TEST_SRC_WAVE_TICKS,

  GST_AUDIO_TEST_SRC_WAVE_GAUSSIAN_WHITE_NOISE,

  GST_AUDIO_TEST_SRC_WAVE_RED_NOISE,

  GST_AUDIO_TEST_SRC_WAVE_BLUE_NOISE,

  GST_AUDIO_TEST_SRC_WAVE_VIOLET_NOISE

} GstAudioTestSrcWave;

#define PINK_MAX_RANDOM_ROWS   (30)

#define PINK_RANDOM_BITS       (16)

#define PINK_RANDOM_SHIFT      ((sizeof(long)*8)-PINK_RANDOM_BITS)

typedef struct {

  glong      rows[PINK_MAX_RANDOM_ROWS];

  glong      running_sum;   /* Used to optimize summing of generators. */

  gint       index;         /* Incremented each sample. */

  gint       index_mask;    /* Index wrapped by ANDing with this mask. */

  gdouble    scalar;        /* Used to scale within range of -1.0 to +1.0 */

} GstPinkNoise;

typedef struct {

  gdouble    state;         /* noise state */

} GstRedNoise;

typedef struct _GstAudioTestSrc GstAudioTestSrc;

typedef struct _GstAudioTestSrcClass GstAudioTestSrcClass;

typedef void (*ProcessFunc) (GstAudioTestSrc*, guint8 *);

/**

 * GstAudioTestSrc:

 *

 * audiotestsrc object structure.

 */

struct _GstAudioTestSrc {

  GstBaseSrc parent;

  ProcessFunc process;

  GstAudioFormatPack pack_func;

  gint pack_size;

  gpointer tmp;

  gsize tmpsize;

  /* parameters */

  GstAudioTestSrcWave wave;

  gdouble volume;

  gdouble freq;

  /* audio parameters */

  GstAudioInfo info;

  gint samples_per_buffer;

  /*< private >*/

  gboolean tags_pushed;			/* send tags just once ? */

  GstClockTimeDiff timestamp_offset;    /* base offset */

  GstClockTime next_time;               /* next timestamp */

  gint64 next_sample;                   /* next sample to send */

  gint64 next_byte;                     /* next byte to send */

  gint64 sample_stop;

  gboolean check_seek_stop;

  gboolean eos_reached;

  gint generate_samples_per_buffer;	/* used to generate a partial buffer */

  gboolean can_activate_pull;

  gboolean reverse;                  /* play backwards */

  /* waveform specific context data */

  GRand *gen;               /* random number generator */

  gdouble accumulator;			/* phase angle */

  GstPinkNoise pink;

  GstRedNoise red;

  gdouble wave_table[1024];

  guint sine_periods_per_tick;

  guint64 tick_interval;

  guint marker_tick_period;

  gdouble marker_tick_volume;

  gboolean apply_tick_ramp;

  guint samples_between_ticks;

  guint tick_counter;

};

struct _GstAudioTestSrcClass {

  GstBaseSrcClass parent_class;

};

GType gst_audio_test_src_get_type (void);

G_END_DECLS

#endif /* __GST_AUDIO_TEST_SRC_H__ */