mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-25 03:01:03 +00:00
7f3f034d44
Original commit message from CVS: * gst/audiotestsrc/gstaudiotestsrc.c: (gst_audiostestsrc_wave_get_type), (gst_audiotestsrc_class_init), (gst_audiotestsrc_init), (gst_audiotestsrc_create_sine), (gst_audiotestsrc_create_square), (gst_audiotestsrc_create_saw), (gst_audiotestsrc_create_triangle), (gst_audiotestsrc_create_silence), (gst_audiotestsrc_create_white_noise), (gst_audiotestsrc_init_pink_noise), (gst_audiotestsrc_generate_pink_noise_value), (gst_audiotestsrc_create_pink_noise), (gst_audiotestsrc_change_wave): * gst/audiotestsrc/gstaudiotestsrc.h: fixed typo, added pink noise
110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000 Wim Taymans <wtay@chello.be>
|
|
*
|
|
* gstsinesrc.h:
|
|
*
|
|
* 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_AUDIOTESTSRC_H__
|
|
#define __GST_AUDIOTESTSRC_H__
|
|
|
|
|
|
#include <gst/gst.h>
|
|
#include <gst/base/gstbasesrc.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
|
|
#define GST_TYPE_AUDIOTESTSRC \
|
|
(gst_audiotestsrc_get_type())
|
|
#define GST_AUDIOTESTSRC(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIOTESTSRC,GstAudioTestSrc))
|
|
#define GST_AUDIOTESTSRC_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIOTESTSRC,GstAudioTestSrcClass))
|
|
#define GST_IS_AUDIOTESTSRC(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIOTESTSRC))
|
|
#define GST_IS_AUDIOTESTSRC_CLASS(obj) \
|
|
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIOTESTSRC))
|
|
|
|
typedef enum {
|
|
GST_AUDIOTESTSRC_WAVE_SINE,
|
|
GST_AUDIOTESTSRC_WAVE_SQUARE,
|
|
GST_AUDIOTESTSRC_WAVE_SAW,
|
|
GST_AUDIOTESTSRC_WAVE_TRIANGLE,
|
|
GST_AUDIOTESTSRC_WAVE_SILENCE,
|
|
GST_AUDIOTESTSRC_WAVE_WHITE_NOISE,
|
|
GST_AUDIOTESTSRC_WAVE_PINK_NOISE,
|
|
} GstAudioTestSrcWaves;
|
|
|
|
#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. */
|
|
gfloat scalar; /* Used to scale within range of -1.0 to +1.0 */
|
|
} GstPinkNoise;
|
|
|
|
typedef struct _GstAudioTestSrc GstAudioTestSrc;
|
|
typedef struct _GstAudioTestSrcClass GstAudioTestSrcClass;
|
|
|
|
struct _GstAudioTestSrc {
|
|
GstBaseSrc parent;
|
|
|
|
void (*process)(GstAudioTestSrc*, gint16 *);
|
|
|
|
/* parameters */
|
|
GstAudioTestSrcWaves wave;
|
|
gdouble volume;
|
|
gdouble freq;
|
|
|
|
/* audio parameters */
|
|
gint samplerate;
|
|
|
|
gint samples_per_buffer;
|
|
|
|
guint64 timestamp;
|
|
guint64 offset;
|
|
|
|
gdouble accumulator;
|
|
|
|
gboolean tags_pushed;
|
|
|
|
GstClockID clock_id;
|
|
GstClockTimeDiff timestamp_offset;
|
|
|
|
/* < private > */
|
|
|
|
/* waveform specific context data */
|
|
GstPinkNoise pink;
|
|
};
|
|
|
|
struct _GstAudioTestSrcClass {
|
|
GstBaseSrcClass parent_class;
|
|
};
|
|
|
|
GType gst_audiotestsrc_get_type(void);
|
|
gboolean gst_audiotestsrc_factory_init (GstElementFactory *factory);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_AUDIOTESTSRC_H__ */
|