/* 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., 59 Temple Place - Suite 330,

 * Boston, MA 02111-1307, USA.

 */

#ifndef __GST_AUDIO_TEST_SRC_H__

#define __GST_AUDIO_TEST_SRC_H__

#include <gst/gst.h>

#include <gst/base/gstbasesrc.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_PINK_NOISE: pink noise

 * @GST_AUDIO_TEST_SRC_WAVE_SINE_TAB: sine wave using a table

 *

 * 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,

} 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 enum {

  GST_AUDIO_TEST_SRC_FORMAT_NONE = -1,

  GST_AUDIO_TEST_SRC_FORMAT_S16 = 0,

  GST_AUDIO_TEST_SRC_FORMAT_S32,

  GST_AUDIO_TEST_SRC_FORMAT_F32,

  GST_AUDIO_TEST_SRC_FORMAT_F64

} GstAudioTestSrcFormat;

typedef struct _GstAudioTestSrc GstAudioTestSrc;

typedef struct _GstAudioTestSrcClass GstAudioTestSrcClass;

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

/**

 * GstAudioTestSrc:

 *

 * audiotestsrc object structure.

 */

struct _GstAudioTestSrc {

  GstBaseSrc parent;

  ProcessFunc process;

  /* parameters */

  GstAudioTestSrcWave wave;

  gdouble volume;

  gdouble freq;

  /* audio parameters */

  gint samplerate;

  gint samples_per_buffer;

  GstAudioTestSrcFormat format;

  /*< private >*/

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

  GstClockTimeDiff timestamp_offset;    /* base offset */

  gboolean check_seek_stop;

  gboolean eos_reached;

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

  /* waveform specific context data */

  gdouble accumulator;			/* phase angle */

  GstPinkNoise pink;

  gdouble wave_table[1024];

};

struct _GstAudioTestSrcClass {

  GstBaseSrcClass parent_class;

};

#ifdef __SYMBIAN32__

IMPORT_C

#endif

GType gst_audio_test_src_get_type (void);

G_END_DECLS

#endif /* __GST_AUDIO_TEST_SRC_H__ */