author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 15:30:33 +0300 | |
branch | RCL_3 |
changeset 29 | 567bb019e3e3 |
parent 0 | 0e761a78d257 |
child 30 | 7e817e7e631c |
permissions | -rw-r--r-- |
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/* GStreamer |
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* Copyright (C) 2005 Stefan Kost <ensonic@users.sf.net> |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public |
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* License along with this library; if not, write to the |
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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* Boston, MA 02111-1307, USA. |
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*/ |
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#ifndef __GST_AUDIO_TEST_SRC_H__ |
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#define __GST_AUDIO_TEST_SRC_H__ |
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#include <gst/gst.h> |
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#include <gst/base/gstbasesrc.h> |
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G_BEGIN_DECLS |
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#define GST_TYPE_AUDIO_TEST_SRC \ |
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(gst_audio_test_src_get_type()) |
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#define GST_AUDIO_TEST_SRC(obj) \ |
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_TEST_SRC,GstAudioTestSrc)) |
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#define GST_AUDIO_TEST_SRC_CLASS(klass) \ |
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIO_TEST_SRC,GstAudioTestSrcClass)) |
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#define GST_IS_AUDIO_TEST_SRC(obj) \ |
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_TEST_SRC)) |
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#define GST_IS_AUDIO_TEST_SRC_CLASS(klass) \ |
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_TEST_SRC)) |
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/** |
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* GstAudioTestSrcWave: |
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* @GST_AUDIO_TEST_SRC_WAVE_SINE: a sine wave |
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* @GST_AUDIO_TEST_SRC_WAVE_SQUARE: a square wave |
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* @GST_AUDIO_TEST_SRC_WAVE_SAW: a saw wave |
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* @GST_AUDIO_TEST_SRC_WAVE_TRIANGLE: a tringle wave |
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* @GST_AUDIO_TEST_SRC_WAVE_SILENCE: silence |
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* @GST_AUDIO_TEST_SRC_WAVE_WHITE_NOISE: white uniform noise |
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* @GST_AUDIO_TEST_SRC_WAVE_PINK_NOISE: pink noise |
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* @GST_AUDIO_TEST_SRC_WAVE_SINE_TAB: sine wave using a table |
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* @GST_AUDIO_TEST_SRC_WAVE_TICKS: periodic ticks |
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* @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. |
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* |
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* Different types of supported sound waves. |
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*/ |
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typedef enum { |
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GST_AUDIO_TEST_SRC_WAVE_SINE, |
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GST_AUDIO_TEST_SRC_WAVE_SQUARE, |
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GST_AUDIO_TEST_SRC_WAVE_SAW, |
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GST_AUDIO_TEST_SRC_WAVE_TRIANGLE, |
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GST_AUDIO_TEST_SRC_WAVE_SILENCE, |
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GST_AUDIO_TEST_SRC_WAVE_WHITE_NOISE, |
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GST_AUDIO_TEST_SRC_WAVE_PINK_NOISE, |
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GST_AUDIO_TEST_SRC_WAVE_SINE_TAB, |
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GST_AUDIO_TEST_SRC_WAVE_TICKS, |
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GST_AUDIO_TEST_SRC_WAVE_GAUSSIAN_WHITE_NOISE |
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} GstAudioTestSrcWave; |
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#define PINK_MAX_RANDOM_ROWS (30) |
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#define PINK_RANDOM_BITS (16) |
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#define PINK_RANDOM_SHIFT ((sizeof(long)*8)-PINK_RANDOM_BITS) |
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typedef struct { |
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glong rows[PINK_MAX_RANDOM_ROWS]; |
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glong running_sum; /* Used to optimize summing of generators. */ |
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gint index; /* Incremented each sample. */ |
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gint index_mask; /* Index wrapped by ANDing with this mask. */ |
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gdouble scalar; /* Used to scale within range of -1.0 to +1.0 */ |
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} GstPinkNoise; |
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typedef enum { |
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GST_AUDIO_TEST_SRC_FORMAT_NONE = -1, |
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GST_AUDIO_TEST_SRC_FORMAT_S16 = 0, |
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GST_AUDIO_TEST_SRC_FORMAT_S32, |
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GST_AUDIO_TEST_SRC_FORMAT_F32, |
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GST_AUDIO_TEST_SRC_FORMAT_F64 |
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} GstAudioTestSrcFormat; |
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typedef struct _GstAudioTestSrc GstAudioTestSrc; |
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typedef struct _GstAudioTestSrcClass GstAudioTestSrcClass; |
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typedef void (*ProcessFunc) (GstAudioTestSrc*, guint8 *); |
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/** |
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* GstAudioTestSrc: |
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* |
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* audiotestsrc object structure. |
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*/ |
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struct _GstAudioTestSrc { |
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GstBaseSrc parent; |
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101 |
|
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ProcessFunc process; |
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103 |
|
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/* parameters */ |
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GstAudioTestSrcWave wave; |
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gdouble volume; |
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gdouble freq; |
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108 |
|
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/* audio parameters */ |
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gint channels; |
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gint samplerate; |
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gint samples_per_buffer; |
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gint sample_size; |
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GstAudioTestSrcFormat format; |
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115 |
|
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/*< private >*/ |
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gboolean tags_pushed; /* send tags just once ? */ |
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GstClockTimeDiff timestamp_offset; /* base offset */ |
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GstClockTime next_time; /* next timestamp */ |
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gint64 next_sample; /* next sample to send */ |
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gint64 next_byte; /* next byte to send */ |
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gint64 sample_stop; |
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gboolean check_seek_stop; |
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gboolean eos_reached; |
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gint generate_samples_per_buffer; /* used to generate a partial buffer */ |
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gboolean can_activate_pull; |
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127 |
|
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/* waveform specific context data */ |
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gdouble accumulator; /* phase angle */ |
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GstPinkNoise pink; |
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gdouble wave_table[1024]; |
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}; |
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133 |
|
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struct _GstAudioTestSrcClass { |
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GstBaseSrcClass parent_class; |
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}; |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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141 |
|
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GType gst_audio_test_src_get_type (void); |
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|
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G_END_DECLS |
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|
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#endif /* __GST_AUDIO_TEST_SRC_H__ */ |