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5f350149a0
Original commit message from CVS: * gst/audiofx/audioamplify.c: (gst_audio_amplify_init), (gst_audio_amplify_setup), (gst_audio_amplify_transform_ip): * gst/audiofx/audiodynamic.c: (gst_audio_dynamic_set_process_function), (gst_audio_dynamic_init), (gst_audio_dynamic_setup), (gst_audio_dynamic_transform_ip): * gst/audiofx/audiodynamic.h: * gst/audiofx/audioinvert.c: (gst_audio_invert_init), (gst_audio_invert_setup), (gst_audio_invert_transform_ip): * gst/audiofx/audioinvert.h: Don't save format information ourselves, this is already saved in GstAudioFilter.
426 lines
13 KiB
C
426 lines
13 KiB
C
/*
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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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* SECTION:element-audioamplify
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* @short_description: Amplifies an audio stream with selectable clipping mode
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*
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* <refsect2>
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* Amplifies an audio stream by a given factor and allows the selection of different clipping modes.
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* The difference between the clipping modes is best evaluated by testing.
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* <title>Example launch line</title>
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* <para>
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* <programlisting>
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* gst-launch audiotestsrc wave=saw ! audioamplify amplification=1.5 ! alsasink
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* gst-launch filesrc location="melo1.ogg" ! oggdemux ! vorbisdec ! audioconvert ! audioamplify amplification=1.5 method=wrap-negative ! alsasink
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* gst-launch audiotestsrc wave=saw ! audioconvert ! audioamplify amplification=1.5 method=wrap-positive ! audioconvert ! alsasink
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* </programlisting>
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* </para>
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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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#include "audioamplify.h"
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#define GST_CAT_DEFAULT gst_audio_amplify_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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static const GstElementDetails element_details =
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GST_ELEMENT_DETAILS ("AudioAmplify",
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"Filter/Effect/Audio",
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"Amplifies an audio stream by a given factor",
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"Sebastian Dröge <slomo@circular-chaos.org>");
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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_AMPLIFICATION,
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PROP_CLIPPING_METHOD
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};
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enum
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{
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METHOD_CLIP = 0,
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METHOD_WRAP_NEGATIVE,
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METHOD_WRAP_POSITIVE,
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NUM_METHODS
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};
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#define GST_TYPE_AUDIO_AMPLIFY_CLIPPING_METHOD (gst_audio_amplify_clipping_method_get_type ())
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static GType
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gst_audio_amplify_clipping_method_get_type (void)
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{
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static GType gtype = 0;
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if (gtype == 0) {
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static const GEnumValue values[] = {
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{METHOD_CLIP, "Normal Clipping (default)", "clip"},
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{METHOD_WRAP_NEGATIVE,
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"Push overdriven values back from the opposite side",
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"wrap-negative"},
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{METHOD_WRAP_POSITIVE, "Push overdriven values back from the same side",
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"wrap-positive"},
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{0, NULL, NULL}
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};
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gtype = g_enum_register_static ("GstAudioPanoramaClippingMethod", values);
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}
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return gtype;
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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_amplify_debug, "audioamplify", 0, "audioamplify element");
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GST_BOILERPLATE_FULL (GstAudioAmplify, gst_audio_amplify, GstAudioFilter,
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GST_TYPE_AUDIO_FILTER, DEBUG_INIT);
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static void gst_audio_amplify_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_audio_amplify_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_audio_amplify_setup (GstAudioFilter * filter,
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GstRingBufferSpec * format);
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static GstFlowReturn gst_audio_amplify_transform_ip (GstBaseTransform * base,
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GstBuffer * buf);
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static void gst_audio_amplify_transform_int_clip (GstAudioAmplify * filter,
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gint16 * data, guint num_samples);
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static void gst_audio_amplify_transform_int_wrap_negative (GstAudioAmplify *
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filter, gint16 * data, guint num_samples);
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static void gst_audio_amplify_transform_int_wrap_positive (GstAudioAmplify *
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filter, gint16 * data, guint num_samples);
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static void gst_audio_amplify_transform_float_clip (GstAudioAmplify * filter,
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gfloat * data, guint num_samples);
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static void gst_audio_amplify_transform_float_wrap_negative (GstAudioAmplify *
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filter, gfloat * data, guint num_samples);
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static void gst_audio_amplify_transform_float_wrap_positive (GstAudioAmplify *
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filter, gfloat * data, guint num_samples);
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/* table of processing functions: [format][clipping_method] */
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static GstAudioAmplifyProcessFunc processing_functions[2][3] = {
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{
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(GstAudioAmplifyProcessFunc) gst_audio_amplify_transform_int_clip,
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(GstAudioAmplifyProcessFunc)
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gst_audio_amplify_transform_int_wrap_negative,
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(GstAudioAmplifyProcessFunc)
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gst_audio_amplify_transform_int_wrap_positive},
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{
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(GstAudioAmplifyProcessFunc) gst_audio_amplify_transform_float_clip,
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(GstAudioAmplifyProcessFunc)
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gst_audio_amplify_transform_float_wrap_negative,
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(GstAudioAmplifyProcessFunc)
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gst_audio_amplify_transform_float_wrap_positive}
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};
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/* GObject vmethod implementations */
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static void
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gst_audio_amplify_base_init (gpointer klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GstCaps *caps;
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gst_element_class_set_details (element_class, &element_details);
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caps = gst_caps_from_string (ALLOWED_CAPS);
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gst_audio_filter_class_add_pad_templates (GST_AUDIO_FILTER_CLASS (klass),
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caps);
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gst_caps_unref (caps);
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}
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static void
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gst_audio_amplify_class_init (GstAudioAmplifyClass * klass)
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{
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GObjectClass *gobject_class;
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gobject_class = (GObjectClass *) klass;
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gobject_class->set_property = gst_audio_amplify_set_property;
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gobject_class->get_property = gst_audio_amplify_get_property;
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g_object_class_install_property (gobject_class, PROP_AMPLIFICATION,
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g_param_spec_float ("amplification", "Amplification",
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"Factor of amplification", 0.0, G_MAXFLOAT,
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1.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
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/**
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* GstAudioAmplify:clipping-method
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*
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* Clipping method: clip mode set values higher than the maximum to the
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* maximum. The wrap-negative mode pushes those values back from the
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* opposite side, wrap-positive pushes them back from the same side.
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*
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**/
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g_object_class_install_property (gobject_class, PROP_CLIPPING_METHOD,
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g_param_spec_enum ("clipping-method", "Clipping method",
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"Selects how to handle values higher than the maximum",
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GST_TYPE_AUDIO_AMPLIFY_CLIPPING_METHOD, METHOD_CLIP,
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G_PARAM_READWRITE));
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GST_AUDIO_FILTER_CLASS (klass)->setup =
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GST_DEBUG_FUNCPTR (gst_audio_amplify_setup);
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GST_BASE_TRANSFORM_CLASS (klass)->transform_ip =
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GST_DEBUG_FUNCPTR (gst_audio_amplify_transform_ip);
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}
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static void
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gst_audio_amplify_init (GstAudioAmplify * filter, GstAudioAmplifyClass * klass)
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{
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filter->amplification = 1.0;
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filter->clipping_method = METHOD_CLIP;
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filter->format_index = 0;
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gst_base_transform_set_in_place (GST_BASE_TRANSFORM (filter), TRUE);
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}
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static gboolean
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gst_audio_amplify_set_process_function (GstAudioAmplify * filter)
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{
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gint method_index;
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/* set processing function */
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method_index = filter->clipping_method;
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if (method_index >= NUM_METHODS || method_index < 0)
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method_index = METHOD_CLIP;
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filter->process = processing_functions[filter->format_index][method_index];
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return TRUE;
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}
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static void
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gst_audio_amplify_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstAudioAmplify *filter = GST_AUDIO_AMPLIFY (object);
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switch (prop_id) {
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case PROP_AMPLIFICATION:
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filter->amplification = g_value_get_float (value);
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gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (filter),
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filter->amplification == 1.0);
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break;
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case PROP_CLIPPING_METHOD:
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filter->clipping_method = g_value_get_enum (value);
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gst_audio_amplify_set_process_function (filter);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_audio_amplify_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstAudioAmplify *filter = GST_AUDIO_AMPLIFY (object);
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switch (prop_id) {
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case PROP_AMPLIFICATION:
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g_value_set_float (value, filter->amplification);
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break;
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case PROP_CLIPPING_METHOD:
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g_value_set_enum (value, filter->clipping_method);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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/* GstAudioFilter vmethod implementations */
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static gboolean
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gst_audio_amplify_setup (GstAudioFilter * base, GstRingBufferSpec * format)
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{
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GstAudioAmplify *filter = GST_AUDIO_AMPLIFY (base);
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gboolean ret;
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if (format->type == GST_BUFTYPE_LINEAR && format->width == 16)
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filter->format_index = 0;
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else if (format->type == GST_BUFTYPE_FLOAT && format->width == 32)
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filter->format_index = 1;
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else
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goto wrong_format;
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ret = gst_audio_amplify_set_process_function (filter);
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if (!ret)
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GST_WARNING ("can't process input");
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return ret;
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wrong_format:
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GST_DEBUG ("wrong format");
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return FALSE;
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}
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static void
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gst_audio_amplify_transform_int_clip (GstAudioAmplify * filter,
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gint16 * data, guint num_samples)
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{
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gint i;
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glong val;
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for (i = 0; i < num_samples; i++) {
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val = (*data) * filter->amplification;
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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_amplify_transform_int_wrap_negative (GstAudioAmplify * filter,
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gint16 * data, guint num_samples)
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{
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gint i;
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glong val;
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for (i = 0; i < num_samples; i++) {
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val = (*data) * filter->amplification;
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if (val > G_MAXINT16)
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val = ((val - G_MININT16) & 0xffff) + G_MININT16;
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else if (val < G_MININT16)
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val = ((val - G_MAXINT16) & 0xffff) + G_MAXINT16;
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*data++ = val;
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}
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}
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static void
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gst_audio_amplify_transform_int_wrap_positive (GstAudioAmplify * filter,
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gint16 * data, guint num_samples)
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{
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gint i;
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glong val;
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for (i = 0; i < num_samples; i++) {
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val = (*data) * filter->amplification;
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while (val > G_MAXINT16 || val < G_MININT16) {
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if (val > G_MAXINT16)
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val = G_MAXINT16 - (val - G_MAXINT16);
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else if (val < G_MININT16)
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val = G_MININT16 - (val - G_MININT16);
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}
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*data++ = val;
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}
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}
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static void
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gst_audio_amplify_transform_float_clip (GstAudioAmplify * 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 val;
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for (i = 0; i < num_samples; i++) {
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val = (*data) * filter->amplification;
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if (val > 1.0)
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val = 1.0;
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else if (val < -1.0)
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val = -1.0;
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*data++ = val;
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}
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}
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static void
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gst_audio_amplify_transform_float_wrap_negative (GstAudioAmplify * 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 val;
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for (i = 0; i < num_samples; i++) {
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val = (*data) * filter->amplification;
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while (val > 1.0 || val < -1.0) {
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if (val > 1.0)
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val = -1.0 + (val - 1.0);
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else if (val < -1.0)
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val = 1.0 + (val + 1.0);
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}
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*data++ = val;
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}
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}
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static void
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gst_audio_amplify_transform_float_wrap_positive (GstAudioAmplify * 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 val;
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for (i = 0; i < num_samples; i++) {
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val = (*data) * filter->amplification;
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while (val > 1.0 || val < -1.0) {
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if (val > 1.0)
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val = 1.0 - (val - 1.0);
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else if (val < -1.0)
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val = -1.0 - (val + 1.0);
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}
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*data++ = val;
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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_amplify_transform_ip (GstBaseTransform * base, GstBuffer * buf)
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{
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GstAudioAmplify *filter = GST_AUDIO_AMPLIFY (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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if (!gst_buffer_is_writable (buf))
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return GST_FLOW_OK;
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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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filter->process (filter, GST_BUFFER_DATA (buf), num_samples);
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return GST_FLOW_OK;
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}
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