2 * Copyright (C) 2005 Stefan Kost <ensonic@users.sf.net>
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.
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.
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.
20 #ifndef __GST_AUDIO_TEST_SRC_H__
21 #define __GST_AUDIO_TEST_SRC_H__
25 #include <gst/base/gstbasesrc.h>
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))
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 uniform 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 * @GST_AUDIO_TEST_SRC_WAVE_TICKS: periodic ticks
52 * @GST_AUDIO_TEST_SRC_WAVE_GAUSSIAN_WHITE_NOISE: white (zero mean) Gaussian noise; volume sets the standard deviation of the noise in units of the range of values of the sample type, e.g. volume=0.1 produces noise with a standard deviation of 0.1*32767=3277 with 16-bit integer samples, or 0.1*1.0=0.1 with floating-point samples.
54 * Different types of supported sound waves.
57 GST_AUDIO_TEST_SRC_WAVE_SINE,
58 GST_AUDIO_TEST_SRC_WAVE_SQUARE,
59 GST_AUDIO_TEST_SRC_WAVE_SAW,
60 GST_AUDIO_TEST_SRC_WAVE_TRIANGLE,
61 GST_AUDIO_TEST_SRC_WAVE_SILENCE,
62 GST_AUDIO_TEST_SRC_WAVE_WHITE_NOISE,
63 GST_AUDIO_TEST_SRC_WAVE_PINK_NOISE,
64 GST_AUDIO_TEST_SRC_WAVE_SINE_TAB,
65 GST_AUDIO_TEST_SRC_WAVE_TICKS,
66 GST_AUDIO_TEST_SRC_WAVE_GAUSSIAN_WHITE_NOISE
67 } GstAudioTestSrcWave;
69 #define PINK_MAX_RANDOM_ROWS (30)
70 #define PINK_RANDOM_BITS (16)
71 #define PINK_RANDOM_SHIFT ((sizeof(long)*8)-PINK_RANDOM_BITS)
74 glong rows[PINK_MAX_RANDOM_ROWS];
75 glong running_sum; /* Used to optimize summing of generators. */
76 gint index; /* Incremented each sample. */
77 gint index_mask; /* Index wrapped by ANDing with this mask. */
78 gdouble scalar; /* Used to scale within range of -1.0 to +1.0 */
82 GST_AUDIO_TEST_SRC_FORMAT_NONE = -1,
83 GST_AUDIO_TEST_SRC_FORMAT_S16 = 0,
84 GST_AUDIO_TEST_SRC_FORMAT_S32,
85 GST_AUDIO_TEST_SRC_FORMAT_F32,
86 GST_AUDIO_TEST_SRC_FORMAT_F64
87 } GstAudioTestSrcFormat;
89 typedef struct _GstAudioTestSrc GstAudioTestSrc;
90 typedef struct _GstAudioTestSrcClass GstAudioTestSrcClass;
92 typedef void (*ProcessFunc) (GstAudioTestSrc*, guint8 *);
97 * audiotestsrc object structure.
99 struct _GstAudioTestSrc {
105 GstAudioTestSrcWave wave;
109 /* audio parameters */
112 gint samples_per_buffer;
114 GstAudioTestSrcFormat format;
117 gboolean tags_pushed; /* send tags just once ? */
118 GstClockTimeDiff timestamp_offset; /* base offset */
119 GstClockTime next_time; /* next timestamp */
120 gint64 next_sample; /* next sample to send */
121 gint64 next_byte; /* next byte to send */
123 gboolean check_seek_stop;
124 gboolean eos_reached;
125 gint generate_samples_per_buffer; /* used to generate a partial buffer */
126 gboolean can_activate_pull;
127 gboolean reverse; /* play backwards */
129 /* waveform specific context data */
130 GRand *gen; /* random number generator */
131 gdouble accumulator; /* phase angle */
133 gdouble wave_table[1024];
136 struct _GstAudioTestSrcClass {
137 GstBaseSrcClass parent_class;
140 GType gst_audio_test_src_get_type (void);
144 #endif /* __GST_AUDIO_TEST_SRC_H__ */