1 /* GStreamer

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

     3  *

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

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

     6  * License as published by the Free Software Foundation; either

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

     8  *

     9  * This library is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    12  * Library General Public License for more details.

    13  *

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

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

    16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

    17  * Boston, MA 02111-1307, USA.

    18  */

    19 

    20 #ifndef __GST_AUDIO_TEST_SRC_H__

    21 #define __GST_AUDIO_TEST_SRC_H__

    22 

    23 

    24 #include <gst/gst.h>

    25 #include <gst/base/gstbasesrc.h>

    26 

    27 G_BEGIN_DECLS

    28 

    29 

    30 #define GST_TYPE_AUDIO_TEST_SRC \

    31   (gst_audio_test_src_get_type())

    32 #define GST_AUDIO_TEST_SRC(obj) \

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

    34 #define GST_AUDIO_TEST_SRC_CLASS(klass) \

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

    36 #define GST_IS_AUDIO_TEST_SRC(obj) \

    37   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_TEST_SRC))

    38 #define GST_IS_AUDIO_TEST_SRC_CLASS(klass) \

    39   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_TEST_SRC))

    40 

    41 /**

    42  * GstAudioTestSrcWave:

    43  * @GST_AUDIO_TEST_SRC_WAVE_SINE: a sine wave

    44  * @GST_AUDIO_TEST_SRC_WAVE_SQUARE: a square wave

    45  * @GST_AUDIO_TEST_SRC_WAVE_SAW: a saw wave

    46  * @GST_AUDIO_TEST_SRC_WAVE_TRIANGLE: a tringle wave

    47  * @GST_AUDIO_TEST_SRC_WAVE_SILENCE: silence

    48  * @GST_AUDIO_TEST_SRC_WAVE_WHITE_NOISE: white noise

    49  * @GST_AUDIO_TEST_SRC_WAVE_PINK_NOISE: pink noise

    50  * @GST_AUDIO_TEST_SRC_WAVE_SINE_TAB: sine wave using a table

    51  *

    52  * Different types of supported sound waves.

    53  */

    54 typedef enum {

    55   GST_AUDIO_TEST_SRC_WAVE_SINE,

    56   GST_AUDIO_TEST_SRC_WAVE_SQUARE,

    57   GST_AUDIO_TEST_SRC_WAVE_SAW,

    58   GST_AUDIO_TEST_SRC_WAVE_TRIANGLE,

    59   GST_AUDIO_TEST_SRC_WAVE_SILENCE,

    60   GST_AUDIO_TEST_SRC_WAVE_WHITE_NOISE,

    61   GST_AUDIO_TEST_SRC_WAVE_PINK_NOISE,

    62   GST_AUDIO_TEST_SRC_WAVE_SINE_TAB

    63 } GstAudioTestSrcWave; 

    64 

    65 #define PINK_MAX_RANDOM_ROWS   (30)

    66 #define PINK_RANDOM_BITS       (16)

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

    68 

    69 typedef struct {

    70   glong      rows[PINK_MAX_RANDOM_ROWS];

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

    72   gint       index;         /* Incremented each sample. */

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

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

    75 } GstPinkNoise;

    76 

    77 typedef enum {

    78   GST_AUDIO_TEST_SRC_FORMAT_NONE = -1,

    79   GST_AUDIO_TEST_SRC_FORMAT_S16 = 0,

    80   GST_AUDIO_TEST_SRC_FORMAT_S32,

    81   GST_AUDIO_TEST_SRC_FORMAT_F32,

    82   GST_AUDIO_TEST_SRC_FORMAT_F64

    83 } GstAudioTestSrcFormat;

    84 

    85 typedef struct _GstAudioTestSrc GstAudioTestSrc;

    86 typedef struct _GstAudioTestSrcClass GstAudioTestSrcClass;

    87 

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

    89 

    90 /**

    91  * GstAudioTestSrc:

    92  *

    93  * audiotestsrc object structure.

    94  */

    95 struct _GstAudioTestSrc {

    96   GstBaseSrc parent;

    97 

    98   ProcessFunc process;

    99 

   100   /* parameters */

   101   GstAudioTestSrcWave wave;

   102   gdouble volume;

   103   gdouble freq;

   104     

   105   /* audio parameters */

   106   gint samplerate;

   107   gint samples_per_buffer;

   108   GstAudioTestSrcFormat format;

   109   

   110   /*< private >*/

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

   112   GstClockTimeDiff timestamp_offset;    /* base offset */

   113   GstClockTime running_time;            /* total running time */

   114   gint64 n_samples;                     /* total samples sent */

   115   gint64 n_samples_stop;

   116   gboolean check_seek_stop;

   117   gboolean eos_reached;

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

   119   

   120   /* waveform specific context data */

   121   gdouble accumulator;			/* phase angle */

   122   GstPinkNoise pink;

   123   gdouble wave_table[1024];

   124 };

   125 

   126 struct _GstAudioTestSrcClass {

   127   GstBaseSrcClass parent_class;

   128 };

   129 #ifdef __SYMBIAN32__

   130 IMPORT_C

   131 #endif

   132 

   133 

   134 GType gst_audio_test_src_get_type (void);

   135 

   136 G_END_DECLS

   137 

   138 #endif /* __GST_AUDIO_TEST_SRC_H__ */