--- /dev/null
+/* 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_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; 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.
+ *
+ * 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
+} 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 channels;
+ gint samplerate;
+ gint samples_per_buffer;
+ gint sample_size;
+ GstAudioTestSrcFormat format;
+
+ /*< 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;
+ gdouble wave_table[1024];
+};
+
+struct _GstAudioTestSrcClass {
+ GstBaseSrcClass parent_class;
+};
+
+GType gst_audio_test_src_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_AUDIO_TEST_SRC_H__ */