author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 16 Apr 2010 15:15:52 +0300 | |
changeset 8 | 4a7fac7dd34a |
permissions | -rw-r--r-- |
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/* |
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* GStreamer |
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* Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org> |
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* Copyright (C) 2006 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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|
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/** |
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* SECTION:element-audioinvert |
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* |
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* Swaps upper and lower half of audio samples. Mixing an inverted sample on top of |
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* the original with a slight delay can produce effects that sound like resonance. |
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* Creating a stereo sample from a mono source, with one channel inverted produces wide-stereo sounds. |
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* |
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* <refsect2> |
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* <title>Example launch line</title> |
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* |[ |
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* gst-launch audiotestsrc wave=saw ! audioinvert invert=0.4 ! alsasink |
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* gst-launch filesrc location="melo1.ogg" ! oggdemux ! vorbisdec ! audioconvert ! audioinvert invert=0.4 ! alsasink |
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* gst-launch audiotestsrc wave=saw ! audioconvert ! audioinvert invert=0.4 ! audioconvert ! alsasink |
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* ]| |
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* </refsect2> |
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*/ |
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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#include <gst/gst.h> |
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#include <gst/base/gstbasetransform.h> |
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#include <gst/audio/audio.h> |
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#include <gst/audio/gstaudiofilter.h> |
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#include <gst/controller/gstcontroller.h> |
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|
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#include "audioinvert.h" |
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#define GST_CAT_DEFAULT gst_audio_invert_debug |
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT); |
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|
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static const GstElementDetails element_details = |
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GST_ELEMENT_DETAILS ("Audio inversion", |
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"Filter/Effect/Audio", |
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"Swaps upper and lower half of audio samples", |
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"Sebastian Dröge <slomo@circular-chaos.org>"); |
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|
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/* Filter signals and args */ |
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enum |
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{ |
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/* FILL ME */ |
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LAST_SIGNAL |
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}; |
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enum |
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{ |
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PROP_0, |
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PROP_DEGREE |
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}; |
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|
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#define ALLOWED_CAPS \ |
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"audio/x-raw-int," \ |
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" depth=(int)16," \ |
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" width=(int)16," \ |
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" endianness=(int)BYTE_ORDER," \ |
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" signed=(bool)TRUE," \ |
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" rate=(int)[1,MAX]," \ |
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" channels=(int)[1,MAX]; " \ |
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"audio/x-raw-float," \ |
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" width=(int)32," \ |
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" endianness=(int)BYTE_ORDER," \ |
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" rate=(int)[1,MAX]," \ |
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" channels=(int)[1,MAX]" |
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#define DEBUG_INIT(bla) \ |
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GST_DEBUG_CATEGORY_INIT (gst_audio_invert_debug, "audioinvert", 0, "audioinvert element"); |
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GST_BOILERPLATE_FULL (GstAudioInvert, gst_audio_invert, GstAudioFilter, |
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GST_TYPE_AUDIO_FILTER, DEBUG_INIT); |
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static void gst_audio_invert_set_property (GObject * object, guint prop_id, |
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const GValue * value, GParamSpec * pspec); |
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static void gst_audio_invert_get_property (GObject * object, guint prop_id, |
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GValue * value, GParamSpec * pspec); |
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static gboolean gst_audio_invert_setup (GstAudioFilter * filter, |
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GstRingBufferSpec * format); |
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static GstFlowReturn gst_audio_invert_transform_ip (GstBaseTransform * base, |
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|
101 |
GstBuffer * buf); |
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|
102 |
|
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|
103 |
static void gst_audio_invert_transform_int (GstAudioInvert * filter, |
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|
104 |
gint16 * data, guint num_samples); |
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|
105 |
static void gst_audio_invert_transform_float (GstAudioInvert * filter, |
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|
106 |
gfloat * data, guint num_samples); |
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|
107 |
|
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108 |
/* GObject vmethod implementations */ |
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|
109 |
|
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110 |
static void |
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111 |
gst_audio_invert_base_init (gpointer klass) |
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112 |
{ |
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass); |
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114 |
GstCaps *caps; |
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|
115 |
|
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116 |
gst_element_class_set_details (element_class, &element_details); |
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|
117 |
|
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caps = gst_caps_from_string (ALLOWED_CAPS); |
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119 |
gst_audio_filter_class_add_pad_templates (GST_AUDIO_FILTER_CLASS (klass), |
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120 |
caps); |
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121 |
gst_caps_unref (caps); |
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122 |
} |
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123 |
|
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124 |
static void |
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125 |
gst_audio_invert_class_init (GstAudioInvertClass * klass) |
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126 |
{ |
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127 |
GObjectClass *gobject_class; |
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|
128 |
|
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129 |
gobject_class = (GObjectClass *) klass; |
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130 |
gobject_class->set_property = gst_audio_invert_set_property; |
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|
131 |
gobject_class->get_property = gst_audio_invert_get_property; |
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|
132 |
|
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133 |
g_object_class_install_property (gobject_class, PROP_DEGREE, |
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|
134 |
g_param_spec_float ("degree", "Degree", |
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|
135 |
"Degree of inversion", 0.0, 1.0, |
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|
136 |
0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); |
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|
137 |
|
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|
138 |
GST_AUDIO_FILTER_CLASS (klass)->setup = |
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|
139 |
GST_DEBUG_FUNCPTR (gst_audio_invert_setup); |
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|
140 |
GST_BASE_TRANSFORM_CLASS (klass)->transform_ip = |
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|
141 |
GST_DEBUG_FUNCPTR (gst_audio_invert_transform_ip); |
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142 |
} |
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|
143 |
|
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144 |
static void |
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145 |
gst_audio_invert_init (GstAudioInvert * filter, GstAudioInvertClass * klass) |
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146 |
{ |
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147 |
filter->degree = 0.0; |
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|
148 |
gst_base_transform_set_in_place (GST_BASE_TRANSFORM (filter), TRUE); |
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149 |
gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM (filter), TRUE); |
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150 |
} |
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|
151 |
|
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152 |
static void |
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153 |
gst_audio_invert_set_property (GObject * object, guint prop_id, |
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154 |
const GValue * value, GParamSpec * pspec) |
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155 |
{ |
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|
156 |
GstAudioInvert *filter = GST_AUDIO_INVERT (object); |
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|
157 |
|
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158 |
switch (prop_id) { |
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|
159 |
case PROP_DEGREE: |
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|
160 |
filter->degree = g_value_get_float (value); |
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|
161 |
gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (filter), |
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|
162 |
filter->degree == 0.0); |
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|
163 |
break; |
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|
164 |
default: |
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|
165 |
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
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|
166 |
break; |
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167 |
} |
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168 |
} |
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|
169 |
|
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170 |
static void |
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|
171 |
gst_audio_invert_get_property (GObject * object, guint prop_id, |
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|
172 |
GValue * value, GParamSpec * pspec) |
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|
173 |
{ |
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|
174 |
GstAudioInvert *filter = GST_AUDIO_INVERT (object); |
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|
175 |
|
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|
176 |
switch (prop_id) { |
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|
177 |
case PROP_DEGREE: |
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|
178 |
g_value_set_float (value, filter->degree); |
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|
179 |
break; |
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|
180 |
default: |
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|
181 |
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
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|
182 |
break; |
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|
183 |
} |
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|
184 |
} |
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|
185 |
|
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|
186 |
/* GstAudioFilter vmethod implementations */ |
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|
187 |
|
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|
188 |
static gboolean |
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|
189 |
gst_audio_invert_setup (GstAudioFilter * base, GstRingBufferSpec * format) |
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|
190 |
{ |
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|
191 |
GstAudioInvert *filter = GST_AUDIO_INVERT (base); |
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|
192 |
gboolean ret = TRUE; |
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|
193 |
|
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|
194 |
if (format->type == GST_BUFTYPE_FLOAT && format->width == 32) |
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|
195 |
filter->process = (GstAudioInvertProcessFunc) |
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|
196 |
gst_audio_invert_transform_float; |
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|
197 |
else if (format->type == GST_BUFTYPE_LINEAR && format->width == 16) |
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|
198 |
filter->process = (GstAudioInvertProcessFunc) |
4a7fac7dd34a
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|
199 |
gst_audio_invert_transform_int; |
4a7fac7dd34a
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|
200 |
else |
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|
201 |
ret = FALSE; |
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changeset
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return ret; |
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} |
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static void |
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gst_audio_invert_transform_int (GstAudioInvert * filter, |
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gint16 * data, guint num_samples) |
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{ |
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gint i; |
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gfloat dry = 1.0 - filter->degree; |
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glong val; |
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|
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for (i = 0; i < num_samples; i++) { |
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val = (*data) * dry + (-1 - (*data)) * filter->degree; |
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*data++ = (gint16) CLAMP (val, G_MININT16, G_MAXINT16); |
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} |
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} |
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static void |
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gst_audio_invert_transform_float (GstAudioInvert * filter, |
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gfloat * data, guint num_samples) |
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{ |
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gint i; |
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gfloat dry = 1.0 - filter->degree; |
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glong val; |
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|
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for (i = 0; i < num_samples; i++) { |
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val = (*data) * dry - (*data) * filter->degree; |
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*data++ = val; |
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} |
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} |
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|
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/* GstBaseTransform vmethod implementations */ |
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static GstFlowReturn |
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gst_audio_invert_transform_ip (GstBaseTransform * base, GstBuffer * buf) |
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{ |
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GstAudioInvert *filter = GST_AUDIO_INVERT (base); |
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guint num_samples = |
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GST_BUFFER_SIZE (buf) / (GST_AUDIO_FILTER (filter)->format.width / 8); |
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|
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if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (buf))) |
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gst_object_sync_values (G_OBJECT (filter), GST_BUFFER_TIMESTAMP (buf)); |
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|
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if (gst_base_transform_is_passthrough (base) || |
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G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_GAP))) |
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return GST_FLOW_OK; |
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|
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filter->process (filter, GST_BUFFER_DATA (buf), num_samples); |
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|
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return GST_FLOW_OK; |
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} |