--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_base/gst/audiotestsrc/gstaudiotestsrc.h	Fri Jan 22 09:59:59 2010 +0200
@@ -0,0 +1,138 @@
+/* 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 noise
+ * @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,
+  GST_AUDIO_TEST_SRC_WAVE_SINE_TAB
+} 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 */
+  GstClockTime running_time;            /* total running time */
+  gint64 n_samples;                     /* total samples sent */
+  gint64 n_samples_stop;
+  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__ */