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/*
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* GStreamer
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* Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
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* Copyright (C) 2006 Sebastian Dröge <slomo@circular-chaos.org>
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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-audiopanorama
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*
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* Stereo panorama effect with controllable pan position. One can choose between the default psychoacoustic panning method,
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* which keeps the same perceived loudness, and a simple panning method that just controls the volume on one channel.
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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 ! audiopanorama panorama=-1.00 ! alsasink
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* gst-launch filesrc location="melo1.ogg" ! oggdemux ! vorbisdec ! audioconvert ! audiopanorama panorama=-1.00 ! alsasink
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* gst-launch audiotestsrc wave=saw ! audioconvert ! audiopanorama panorama=-1.00 ! audioconvert ! alsasink
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* gst-launch audiotestsrc wave=saw ! audioconvert ! audiopanorama method=simple panorama=-0.50 ! 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/controller/gstcontroller.h>
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#include "audiopanorama.h"
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#define GST_CAT_DEFAULT gst_audio_panorama_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 ("Stereo positioning",
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"Filter/Effect/Audio",
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"Positions audio streams in the stereo panorama",
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"Stefan Kost <ensonic@users.sf.net>");
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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_PANORAMA,
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PROP_METHOD
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};
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enum
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{
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METHOD_PSYCHOACOUSTIC = 0,
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METHOD_SIMPLE,
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NUM_METHODS
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};
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#define GST_TYPE_AUDIO_PANORAMA_METHOD (gst_audio_panorama_method_get_type ())
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static GType
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gst_audio_panorama_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_PSYCHOACOUSTIC, "Psychoacoustic Panning (default)",
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"psychoacoustic"},
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{METHOD_SIMPLE, "Simple Panning", "simple"},
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{0, NULL, NULL}
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};
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gtype = g_enum_register_static ("GstAudioPanoramaMethod", values);
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}
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return gtype;
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}
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static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/x-raw-float, "
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"rate = (int) [ 1, MAX ], "
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"channels = (int) [ 1, 2 ], "
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"endianness = (int) BYTE_ORDER, " "width = (int) 32; "
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"audio/x-raw-int, "
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"rate = (int) [ 1, MAX ], "
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"channels = (int) [ 1, 2 ], "
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"endianness = (int) BYTE_ORDER, "
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"width = (int) 16, " "depth = (int) 16, " "signed = (boolean) true")
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);
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/x-raw-float, "
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"rate = (int) [ 1, MAX ], "
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"channels = (int) 2, "
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"endianness = (int) BYTE_ORDER, " "width = (int) 32; "
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"audio/x-raw-int, "
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"rate = (int) [ 1, MAX ], "
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"channels = (int) 2, "
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"endianness = (int) BYTE_ORDER, "
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"width = (int) 16, " "depth = (int) 16, " "signed = (boolean) true")
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);
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#define DEBUG_INIT(bla) \
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GST_DEBUG_CATEGORY_INIT (gst_audio_panorama_debug, "audiopanorama", 0, "audiopanorama element");
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GST_BOILERPLATE_FULL (GstAudioPanorama, gst_audio_panorama, GstBaseTransform,
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GST_TYPE_BASE_TRANSFORM, DEBUG_INIT);
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static void gst_audio_panorama_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_audio_panorama_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_audio_panorama_get_unit_size (GstBaseTransform * base,
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GstCaps * caps, guint * size);
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static GstCaps *gst_audio_panorama_transform_caps (GstBaseTransform * base,
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GstPadDirection direction, GstCaps * caps);
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static gboolean gst_audio_panorama_set_caps (GstBaseTransform * base,
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GstCaps * incaps, GstCaps * outcaps);
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static void gst_audio_panorama_transform_m2s_int (GstAudioPanorama * filter,
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gint16 * idata, gint16 * odata, guint num_samples);
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static void gst_audio_panorama_transform_s2s_int (GstAudioPanorama * filter,
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gint16 * idata, gint16 * odata, guint num_samples);
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static void gst_audio_panorama_transform_m2s_float (GstAudioPanorama * filter,
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gfloat * idata, gfloat * odata, guint num_samples);
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static void gst_audio_panorama_transform_s2s_float (GstAudioPanorama * filter,
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gfloat * idata, gfloat * odata, guint num_samples);
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static void gst_audio_panorama_transform_m2s_int_simple (GstAudioPanorama *
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filter, gint16 * idata, gint16 * odata, guint num_samples);
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static void gst_audio_panorama_transform_s2s_int_simple (GstAudioPanorama *
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filter, gint16 * idata, gint16 * odata, guint num_samples);
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static void gst_audio_panorama_transform_m2s_float_simple (GstAudioPanorama *
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filter, gfloat * idata, gfloat * odata, guint num_samples);
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static void gst_audio_panorama_transform_s2s_float_simple (GstAudioPanorama *
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filter, gfloat * idata, gfloat * odata, guint num_samples);
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static GstFlowReturn gst_audio_panorama_transform (GstBaseTransform * base,
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GstBuffer * inbuf, GstBuffer * outbuf);
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/* Table with processing functions: [channels][format][method] */
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static GstAudioPanoramaProcessFunc panorama_process_functions[2][2][2] = {
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{
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{(GstAudioPanoramaProcessFunc) gst_audio_panorama_transform_m2s_int,
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(GstAudioPanoramaProcessFunc)
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gst_audio_panorama_transform_m2s_int_simple},
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{(GstAudioPanoramaProcessFunc) gst_audio_panorama_transform_m2s_float,
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(GstAudioPanoramaProcessFunc)
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gst_audio_panorama_transform_m2s_float_simple}
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},
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{
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{(GstAudioPanoramaProcessFunc) gst_audio_panorama_transform_s2s_int,
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(GstAudioPanoramaProcessFunc)
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gst_audio_panorama_transform_s2s_int_simple},
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{(GstAudioPanoramaProcessFunc) gst_audio_panorama_transform_s2s_float,
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(GstAudioPanoramaProcessFunc)
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gst_audio_panorama_transform_s2s_float_simple}
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}
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};
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/* GObject vmethod implementations */
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static void
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gst_audio_panorama_base_init (gpointer klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sink_template));
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gst_element_class_set_details (element_class, &element_details);
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}
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static void
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gst_audio_panorama_class_init (GstAudioPanoramaClass * 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_panorama_set_property;
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gobject_class->get_property = gst_audio_panorama_get_property;
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g_object_class_install_property (gobject_class, PROP_PANORAMA,
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g_param_spec_float ("panorama", "Panorama",
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"Position in stereo panorama (-1.0 left -> 1.0 right)", -1.0, 1.0,
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0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
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/**
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* GstAudioPanorama:method
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*
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* Panning method: psychoacoustic mode keeps the same perceived loudness,
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* while simple mode just controls the volume of one channel. It's merely
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* a matter of taste which method should be chosen.
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*
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* Since: 0.10.6
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**/
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g_object_class_install_property (gobject_class, PROP_METHOD,
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g_param_spec_enum ("method", "Panning method",
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"Psychoacoustic mode keeps same perceived loudness, "
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"simple mode just controls volume of one channel.",
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GST_TYPE_AUDIO_PANORAMA_METHOD, METHOD_PSYCHOACOUSTIC,
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G_PARAM_READWRITE));
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GST_BASE_TRANSFORM_CLASS (klass)->get_unit_size =
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GST_DEBUG_FUNCPTR (gst_audio_panorama_get_unit_size);
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GST_BASE_TRANSFORM_CLASS (klass)->transform_caps =
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GST_DEBUG_FUNCPTR (gst_audio_panorama_transform_caps);
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GST_BASE_TRANSFORM_CLASS (klass)->set_caps =
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GST_DEBUG_FUNCPTR (gst_audio_panorama_set_caps);
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GST_BASE_TRANSFORM_CLASS (klass)->transform =
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GST_DEBUG_FUNCPTR (gst_audio_panorama_transform);
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}
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static void
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gst_audio_panorama_init (GstAudioPanorama * filter,
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GstAudioPanoramaClass * klass)
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{
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filter->panorama = 0;
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filter->method = METHOD_PSYCHOACOUSTIC;
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filter->width = 0;
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filter->channels = 0;
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filter->format_float = FALSE;
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filter->process = NULL;
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gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM (filter), TRUE);
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}
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static gboolean
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gst_audio_panorama_set_process_function (GstAudioPanorama * filter)
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{
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gint channel_index, format_index, method_index;
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/* set processing function */
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channel_index = filter->channels - 1;
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if (channel_index > 1 || channel_index < 0) {
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filter->process = NULL;
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return FALSE;
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}
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format_index = (filter->format_float) ? 1 : 0;
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method_index = filter->method;
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if (method_index >= NUM_METHODS || method_index < 0)
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method_index = METHOD_PSYCHOACOUSTIC;
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filter->process =
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panorama_process_functions[channel_index][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_panorama_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstAudioPanorama *filter = GST_AUDIO_PANORAMA (object);
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switch (prop_id) {
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case PROP_PANORAMA:
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filter->panorama = g_value_get_float (value);
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break;
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case PROP_METHOD:
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filter->method = g_value_get_enum (value);
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gst_audio_panorama_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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293 |
break;
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}
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}
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297 |
static void
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gst_audio_panorama_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstAudioPanorama *filter = GST_AUDIO_PANORAMA (object);
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302 |
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switch (prop_id) {
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case PROP_PANORAMA:
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g_value_set_float (value, filter->panorama);
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break;
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case PROP_METHOD:
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g_value_set_enum (value, filter->method);
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break;
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310 |
default:
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311 |
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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312 |
break;
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313 |
}
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314 |
}
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315 |
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316 |
/* GstBaseTransform vmethod implementations */
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317 |
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318 |
static gboolean
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gst_audio_panorama_get_unit_size (GstBaseTransform * base, GstCaps * caps,
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320 |
guint * size)
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321 |
{
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322 |
gint width, channels;
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323 |
GstStructure *structure;
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324 |
gboolean ret;
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325 |
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g_assert (size);
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328 |
/* this works for both float and int */
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structure = gst_caps_get_structure (caps, 0);
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ret = gst_structure_get_int (structure, "width", &width);
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ret &= gst_structure_get_int (structure, "channels", &channels);
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332 |
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*size = width * channels / 8;
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334 |
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335 |
return ret;
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336 |
}
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337 |
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338 |
static GstCaps *
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339 |
gst_audio_panorama_transform_caps (GstBaseTransform * base,
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340 |
GstPadDirection direction, GstCaps * caps)
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341 |
{
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342 |
GstCaps *res;
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343 |
GstStructure *structure;
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344 |
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345 |
/* transform caps gives one single caps so we can just replace
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* the channel property with our range. */
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res = gst_caps_copy (caps);
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structure = gst_caps_get_structure (res, 0);
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349 |
if (direction == GST_PAD_SRC) {
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GST_INFO ("allow 1-2 channels");
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gst_structure_set (structure, "channels", GST_TYPE_INT_RANGE, 1, 2, NULL);
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352 |
} else {
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353 |
GST_INFO ("allow 2 channels");
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gst_structure_set (structure, "channels", G_TYPE_INT, 2, NULL);
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355 |
}
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356 |
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357 |
return res;
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358 |
}
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359 |
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360 |
static gboolean
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361 |
gst_audio_panorama_set_caps (GstBaseTransform * base, GstCaps * incaps,
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362 |
GstCaps * outcaps)
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|
363 |
{
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364 |
GstAudioPanorama *filter = GST_AUDIO_PANORAMA (base);
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365 |
const GstStructure *structure;
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366 |
gboolean ret;
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367 |
gint width;
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368 |
const gchar *fmt;
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369 |
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370 |
/*GST_INFO ("incaps are %" GST_PTR_FORMAT, incaps); */
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371 |
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372 |
structure = gst_caps_get_structure (incaps, 0);
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373 |
ret = gst_structure_get_int (structure, "channels", &filter->channels);
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|
374 |
if (!ret)
|
|
375 |
goto no_channels;
|
|
376 |
|
|
377 |
ret = gst_structure_get_int (structure, "width", &width);
|
|
378 |
if (!ret)
|
|
379 |
goto no_width;
|
|
380 |
filter->width = width / 8;
|
|
381 |
|
|
382 |
fmt = gst_structure_get_name (structure);
|
|
383 |
if (!strcmp (fmt, "audio/x-raw-int"))
|
|
384 |
filter->format_float = FALSE;
|
|
385 |
else
|
|
386 |
filter->format_float = TRUE;
|
|
387 |
|
|
388 |
GST_DEBUG ("try to process %s input with %d channels", fmt, filter->channels);
|
|
389 |
|
|
390 |
ret = gst_audio_panorama_set_process_function (filter);
|
|
391 |
|
|
392 |
if (!ret)
|
|
393 |
GST_WARNING ("can't process input with %d channels", filter->channels);
|
|
394 |
|
|
395 |
return ret;
|
|
396 |
|
|
397 |
no_channels:
|
|
398 |
GST_DEBUG ("no channels in caps");
|
|
399 |
return ret;
|
|
400 |
no_width:
|
|
401 |
GST_DEBUG ("no width in caps");
|
|
402 |
return ret;
|
|
403 |
}
|
|
404 |
|
|
405 |
/* psychoacoustic processing functions */
|
|
406 |
static void
|
|
407 |
gst_audio_panorama_transform_m2s_int (GstAudioPanorama * filter, gint16 * idata,
|
|
408 |
gint16 * odata, guint num_samples)
|
|
409 |
{
|
|
410 |
guint i;
|
|
411 |
gdouble val;
|
|
412 |
glong lval, rval;
|
|
413 |
gdouble rpan, lpan;
|
|
414 |
|
|
415 |
/* pan: -1.0 0.0 1.0
|
|
416 |
* lpan: 1.0 0.5 0.0
|
|
417 |
* rpan: 0.0 0.5 1.0
|
|
418 |
*
|
|
419 |
* FIXME: we should use -3db (1/sqtr(2)) for 50:50
|
|
420 |
*/
|
|
421 |
rpan = (gdouble) (filter->panorama + 1.0) / 2.0;
|
|
422 |
lpan = 1.0 - rpan;
|
|
423 |
|
|
424 |
for (i = 0; i < num_samples; i++) {
|
|
425 |
val = (gdouble) * idata++;
|
|
426 |
|
|
427 |
lval = (glong) (val * lpan);
|
|
428 |
rval = (glong) (val * rpan);
|
|
429 |
|
|
430 |
*odata++ = (gint16) CLAMP (lval, G_MININT16, G_MAXINT16);
|
|
431 |
*odata++ = (gint16) CLAMP (rval, G_MININT16, G_MAXINT16);
|
|
432 |
}
|
|
433 |
}
|
|
434 |
|
|
435 |
static void
|
|
436 |
gst_audio_panorama_transform_s2s_int (GstAudioPanorama * filter, gint16 * idata,
|
|
437 |
gint16 * odata, guint num_samples)
|
|
438 |
{
|
|
439 |
guint i;
|
|
440 |
glong lval, rval;
|
|
441 |
gdouble lival, rival;
|
|
442 |
gdouble lrpan, llpan, rrpan, rlpan;
|
|
443 |
|
|
444 |
/* pan: -1.0 0.0 1.0
|
|
445 |
* llpan: 1.0 1.0 0.0
|
|
446 |
* lrpan: 1.0 0.0 0.0
|
|
447 |
* rrpan: 0.0 1.0 1.0
|
|
448 |
* rlpan: 0.0 0.0 1.0
|
|
449 |
*/
|
|
450 |
if (filter->panorama > 0) {
|
|
451 |
rlpan = (gdouble) filter->panorama;
|
|
452 |
llpan = 1.0 - rlpan;
|
|
453 |
lrpan = 0.0;
|
|
454 |
rrpan = 1.0;
|
|
455 |
} else {
|
|
456 |
rrpan = (gdouble) (1.0 + filter->panorama);
|
|
457 |
lrpan = 1.0 - rrpan;
|
|
458 |
rlpan = 0.0;
|
|
459 |
llpan = 1.0;
|
|
460 |
}
|
|
461 |
|
|
462 |
for (i = 0; i < num_samples; i++) {
|
|
463 |
lival = (gdouble) * idata++;
|
|
464 |
rival = (gdouble) * idata++;
|
|
465 |
|
|
466 |
lval = lival * llpan + rival * lrpan;
|
|
467 |
rval = lival * rlpan + rival * rrpan;
|
|
468 |
|
|
469 |
*odata++ = (gint16) CLAMP (lval, G_MININT16, G_MAXINT16);
|
|
470 |
*odata++ = (gint16) CLAMP (rval, G_MININT16, G_MAXINT16);
|
|
471 |
}
|
|
472 |
}
|
|
473 |
|
|
474 |
static void
|
|
475 |
gst_audio_panorama_transform_m2s_float (GstAudioPanorama * filter,
|
|
476 |
gfloat * idata, gfloat * odata, guint num_samples)
|
|
477 |
{
|
|
478 |
guint i;
|
|
479 |
gfloat val;
|
|
480 |
gdouble rpan, lpan;
|
|
481 |
|
|
482 |
/* pan: -1.0 0.0 1.0
|
|
483 |
* lpan: 1.0 0.5 0.0
|
|
484 |
* rpan: 0.0 0.5 1.0
|
|
485 |
*
|
|
486 |
* FIXME: we should use -3db (1/sqtr(2)) for 50:50
|
|
487 |
*/
|
|
488 |
rpan = (gdouble) (filter->panorama + 1.0) / 2.0;
|
|
489 |
lpan = 1.0 - rpan;
|
|
490 |
|
|
491 |
for (i = 0; i < num_samples; i++) {
|
|
492 |
val = *idata++;
|
|
493 |
|
|
494 |
*odata++ = val * lpan;
|
|
495 |
*odata++ = val * rpan;
|
|
496 |
}
|
|
497 |
}
|
|
498 |
|
|
499 |
static void
|
|
500 |
gst_audio_panorama_transform_s2s_float (GstAudioPanorama * filter,
|
|
501 |
gfloat * idata, gfloat * odata, guint num_samples)
|
|
502 |
{
|
|
503 |
guint i;
|
|
504 |
gfloat lival, rival;
|
|
505 |
gdouble lrpan, llpan, rrpan, rlpan;
|
|
506 |
|
|
507 |
/* pan: -1.0 0.0 1.0
|
|
508 |
* llpan: 1.0 1.0 0.0
|
|
509 |
* lrpan: 1.0 0.0 0.0
|
|
510 |
* rrpan: 0.0 1.0 1.0
|
|
511 |
* rlpan: 0.0 0.0 1.0
|
|
512 |
*/
|
|
513 |
if (filter->panorama > 0) {
|
|
514 |
rlpan = (gdouble) filter->panorama;
|
|
515 |
llpan = 1.0 - rlpan;
|
|
516 |
lrpan = 0.0;
|
|
517 |
rrpan = 1.0;
|
|
518 |
} else {
|
|
519 |
rrpan = (gdouble) (1.0 + filter->panorama);
|
|
520 |
lrpan = 1.0 - rrpan;
|
|
521 |
rlpan = 0.0;
|
|
522 |
llpan = 1.0;
|
|
523 |
}
|
|
524 |
|
|
525 |
for (i = 0; i < num_samples; i++) {
|
|
526 |
lival = *idata++;
|
|
527 |
rival = *idata++;
|
|
528 |
|
|
529 |
*odata++ = lival * llpan + rival * lrpan;
|
|
530 |
*odata++ = lival * rlpan + rival * rrpan;
|
|
531 |
}
|
|
532 |
}
|
|
533 |
|
|
534 |
/* simple processing functions */
|
|
535 |
static void
|
|
536 |
gst_audio_panorama_transform_m2s_int_simple (GstAudioPanorama * filter,
|
|
537 |
gint16 * idata, gint16 * odata, guint num_samples)
|
|
538 |
{
|
|
539 |
guint i;
|
|
540 |
gdouble val;
|
|
541 |
glong lval, rval;
|
|
542 |
|
|
543 |
for (i = 0; i < num_samples; i++) {
|
|
544 |
val = (gdouble) * idata++;
|
|
545 |
|
|
546 |
if (filter->panorama > 0.0) {
|
|
547 |
lval = (glong) (val * (1.0 - filter->panorama));
|
|
548 |
rval = (glong) val;
|
|
549 |
} else {
|
|
550 |
lval = (glong) val;
|
|
551 |
rval = (glong) (val * (1.0 + filter->panorama));
|
|
552 |
}
|
|
553 |
|
|
554 |
*odata++ = (gint16) CLAMP (lval, G_MININT16, G_MAXINT16);
|
|
555 |
*odata++ = (gint16) CLAMP (rval, G_MININT16, G_MAXINT16);
|
|
556 |
}
|
|
557 |
}
|
|
558 |
|
|
559 |
static void
|
|
560 |
gst_audio_panorama_transform_s2s_int_simple (GstAudioPanorama * filter,
|
|
561 |
gint16 * idata, gint16 * odata, guint num_samples)
|
|
562 |
{
|
|
563 |
guint i;
|
|
564 |
glong lval, rval;
|
|
565 |
gdouble lival, rival;
|
|
566 |
|
|
567 |
for (i = 0; i < num_samples; i++) {
|
|
568 |
lival = (gdouble) * idata++;
|
|
569 |
rival = (gdouble) * idata++;
|
|
570 |
|
|
571 |
if (filter->panorama > 0.0) {
|
|
572 |
lval = (glong) (lival * (1.0 - filter->panorama));
|
|
573 |
rval = (glong) rival;
|
|
574 |
} else {
|
|
575 |
lval = (glong) lival;
|
|
576 |
rval = (glong) (rival * (1.0 + filter->panorama));
|
|
577 |
}
|
|
578 |
|
|
579 |
*odata++ = (gint16) CLAMP (lval, G_MININT16, G_MAXINT16);
|
|
580 |
*odata++ = (gint16) CLAMP (rval, G_MININT16, G_MAXINT16);
|
|
581 |
}
|
|
582 |
}
|
|
583 |
|
|
584 |
static void
|
|
585 |
gst_audio_panorama_transform_m2s_float_simple (GstAudioPanorama * filter,
|
|
586 |
gfloat * idata, gfloat * odata, guint num_samples)
|
|
587 |
{
|
|
588 |
guint i;
|
|
589 |
gfloat val;
|
|
590 |
|
|
591 |
|
|
592 |
for (i = 0; i < num_samples; i++) {
|
|
593 |
val = *idata++;
|
|
594 |
|
|
595 |
if (filter->panorama > 0.0) {
|
|
596 |
*odata++ = val * (1.0 - filter->panorama);
|
|
597 |
*odata++ = val;
|
|
598 |
} else {
|
|
599 |
*odata++ = val;
|
|
600 |
*odata++ = val * (1.0 + filter->panorama);
|
|
601 |
}
|
|
602 |
}
|
|
603 |
}
|
|
604 |
|
|
605 |
static void
|
|
606 |
gst_audio_panorama_transform_s2s_float_simple (GstAudioPanorama * filter,
|
|
607 |
gfloat * idata, gfloat * odata, guint num_samples)
|
|
608 |
{
|
|
609 |
guint i;
|
|
610 |
gfloat lival, rival;
|
|
611 |
|
|
612 |
for (i = 0; i < num_samples; i++) {
|
|
613 |
lival = *idata++;
|
|
614 |
rival = *idata++;
|
|
615 |
|
|
616 |
if (filter->panorama > 0.0) {
|
|
617 |
*odata++ = lival * (1.0 - filter->panorama);
|
|
618 |
*odata++ = rival;
|
|
619 |
} else {
|
|
620 |
*odata++ = lival;
|
|
621 |
*odata++ = rival * (1.0 + filter->panorama);
|
|
622 |
}
|
|
623 |
}
|
|
624 |
}
|
|
625 |
|
|
626 |
/* this function does the actual processing
|
|
627 |
*/
|
|
628 |
static GstFlowReturn
|
|
629 |
gst_audio_panorama_transform (GstBaseTransform * base, GstBuffer * inbuf,
|
|
630 |
GstBuffer * outbuf)
|
|
631 |
{
|
|
632 |
GstAudioPanorama *filter = GST_AUDIO_PANORAMA (base);
|
|
633 |
guint num_samples = GST_BUFFER_SIZE (outbuf) / (2 * filter->width);
|
|
634 |
|
|
635 |
if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (outbuf)))
|
|
636 |
gst_object_sync_values (G_OBJECT (filter), GST_BUFFER_TIMESTAMP (outbuf));
|
|
637 |
|
|
638 |
if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_GAP))) {
|
|
639 |
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_GAP);
|
|
640 |
memset (GST_BUFFER_DATA (outbuf), 0, GST_BUFFER_SIZE (outbuf));
|
|
641 |
return GST_FLOW_OK;
|
|
642 |
}
|
|
643 |
|
|
644 |
filter->process (filter, GST_BUFFER_DATA (inbuf),
|
|
645 |
GST_BUFFER_DATA (outbuf), num_samples);
|
|
646 |
|
|
647 |
return GST_FLOW_OK;
|
|
648 |
}
|