--- a/gst_plugins_good/gst/audiofx/audioinvert.c Fri Jul 09 16:26:45 2010 -0500
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,252 +0,0 @@
-/*
- * GStreamer
- * Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
- * Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-/**
- * SECTION:element-audioinvert
- *
- * Swaps upper and lower half of audio samples. Mixing an inverted sample on top of
- * the original with a slight delay can produce effects that sound like resonance.
- * Creating a stereo sample from a mono source, with one channel inverted produces wide-stereo sounds.
- *
- * <refsect2>
- * <title>Example launch line</title>
- * |[
- * gst-launch audiotestsrc wave=saw ! audioinvert invert=0.4 ! alsasink
- * gst-launch filesrc location="melo1.ogg" ! oggdemux ! vorbisdec ! audioconvert ! audioinvert invert=0.4 ! alsasink
- * gst-launch audiotestsrc wave=saw ! audioconvert ! audioinvert invert=0.4 ! audioconvert ! alsasink
- * ]|
- * </refsect2>
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <gst/gst.h>
-#include <gst/base/gstbasetransform.h>
-#include <gst/audio/audio.h>
-#include <gst/audio/gstaudiofilter.h>
-#include <gst/controller/gstcontroller.h>
-
-#include "audioinvert.h"
-
-#define GST_CAT_DEFAULT gst_audio_invert_debug
-GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
-
-static const GstElementDetails element_details =
-GST_ELEMENT_DETAILS ("Audio inversion",
- "Filter/Effect/Audio",
- "Swaps upper and lower half of audio samples",
- "Sebastian Dröge <slomo@circular-chaos.org>");
-
-/* Filter signals and args */
-enum
-{
- /* FILL ME */
- LAST_SIGNAL
-};
-
-enum
-{
- PROP_0,
- PROP_DEGREE
-};
-
-#define ALLOWED_CAPS \
- "audio/x-raw-int," \
- " depth=(int)16," \
- " width=(int)16," \
- " endianness=(int)BYTE_ORDER," \
- " signed=(bool)TRUE," \
- " rate=(int)[1,MAX]," \
- " channels=(int)[1,MAX]; " \
- "audio/x-raw-float," \
- " width=(int)32," \
- " endianness=(int)BYTE_ORDER," \
- " rate=(int)[1,MAX]," \
- " channels=(int)[1,MAX]"
-
-#define DEBUG_INIT(bla) \
- GST_DEBUG_CATEGORY_INIT (gst_audio_invert_debug, "audioinvert", 0, "audioinvert element");
-
-GST_BOILERPLATE_FULL (GstAudioInvert, gst_audio_invert, GstAudioFilter,
- GST_TYPE_AUDIO_FILTER, DEBUG_INIT);
-
-static void gst_audio_invert_set_property (GObject * object, guint prop_id,
- const GValue * value, GParamSpec * pspec);
-static void gst_audio_invert_get_property (GObject * object, guint prop_id,
- GValue * value, GParamSpec * pspec);
-
-static gboolean gst_audio_invert_setup (GstAudioFilter * filter,
- GstRingBufferSpec * format);
-static GstFlowReturn gst_audio_invert_transform_ip (GstBaseTransform * base,
- GstBuffer * buf);
-
-static void gst_audio_invert_transform_int (GstAudioInvert * filter,
- gint16 * data, guint num_samples);
-static void gst_audio_invert_transform_float (GstAudioInvert * filter,
- gfloat * data, guint num_samples);
-
-/* GObject vmethod implementations */
-
-static void
-gst_audio_invert_base_init (gpointer klass)
-{
- GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
- GstCaps *caps;
-
- gst_element_class_set_details (element_class, &element_details);
-
- caps = gst_caps_from_string (ALLOWED_CAPS);
- gst_audio_filter_class_add_pad_templates (GST_AUDIO_FILTER_CLASS (klass),
- caps);
- gst_caps_unref (caps);
-}
-
-static void
-gst_audio_invert_class_init (GstAudioInvertClass * klass)
-{
- GObjectClass *gobject_class;
-
- gobject_class = (GObjectClass *) klass;
- gobject_class->set_property = gst_audio_invert_set_property;
- gobject_class->get_property = gst_audio_invert_get_property;
-
- g_object_class_install_property (gobject_class, PROP_DEGREE,
- g_param_spec_float ("degree", "Degree",
- "Degree of inversion", 0.0, 1.0,
- 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
-
- GST_AUDIO_FILTER_CLASS (klass)->setup =
- GST_DEBUG_FUNCPTR (gst_audio_invert_setup);
- GST_BASE_TRANSFORM_CLASS (klass)->transform_ip =
- GST_DEBUG_FUNCPTR (gst_audio_invert_transform_ip);
-}
-
-static void
-gst_audio_invert_init (GstAudioInvert * filter, GstAudioInvertClass * klass)
-{
- filter->degree = 0.0;
- gst_base_transform_set_in_place (GST_BASE_TRANSFORM (filter), TRUE);
- gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM (filter), TRUE);
-}
-
-static void
-gst_audio_invert_set_property (GObject * object, guint prop_id,
- const GValue * value, GParamSpec * pspec)
-{
- GstAudioInvert *filter = GST_AUDIO_INVERT (object);
-
- switch (prop_id) {
- case PROP_DEGREE:
- filter->degree = g_value_get_float (value);
- gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (filter),
- filter->degree == 0.0);
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-static void
-gst_audio_invert_get_property (GObject * object, guint prop_id,
- GValue * value, GParamSpec * pspec)
-{
- GstAudioInvert *filter = GST_AUDIO_INVERT (object);
-
- switch (prop_id) {
- case PROP_DEGREE:
- g_value_set_float (value, filter->degree);
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-/* GstAudioFilter vmethod implementations */
-
-static gboolean
-gst_audio_invert_setup (GstAudioFilter * base, GstRingBufferSpec * format)
-{
- GstAudioInvert *filter = GST_AUDIO_INVERT (base);
- gboolean ret = TRUE;
-
- if (format->type == GST_BUFTYPE_FLOAT && format->width == 32)
- filter->process = (GstAudioInvertProcessFunc)
- gst_audio_invert_transform_float;
- else if (format->type == GST_BUFTYPE_LINEAR && format->width == 16)
- filter->process = (GstAudioInvertProcessFunc)
- gst_audio_invert_transform_int;
- else
- ret = FALSE;
-
- return ret;
-}
-
-static void
-gst_audio_invert_transform_int (GstAudioInvert * filter,
- gint16 * data, guint num_samples)
-{
- gint i;
- gfloat dry = 1.0 - filter->degree;
- glong val;
-
- for (i = 0; i < num_samples; i++) {
- val = (*data) * dry + (-1 - (*data)) * filter->degree;
- *data++ = (gint16) CLAMP (val, G_MININT16, G_MAXINT16);
- }
-}
-
-static void
-gst_audio_invert_transform_float (GstAudioInvert * filter,
- gfloat * data, guint num_samples)
-{
- gint i;
- gfloat dry = 1.0 - filter->degree;
- glong val;
-
- for (i = 0; i < num_samples; i++) {
- val = (*data) * dry - (*data) * filter->degree;
- *data++ = val;
- }
-}
-
-/* GstBaseTransform vmethod implementations */
-static GstFlowReturn
-gst_audio_invert_transform_ip (GstBaseTransform * base, GstBuffer * buf)
-{
- GstAudioInvert *filter = GST_AUDIO_INVERT (base);
- guint num_samples =
- GST_BUFFER_SIZE (buf) / (GST_AUDIO_FILTER (filter)->format.width / 8);
-
- if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (buf)))
- gst_object_sync_values (G_OBJECT (filter), GST_BUFFER_TIMESTAMP (buf));
-
- if (gst_base_transform_is_passthrough (base) ||
- G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_GAP)))
- return GST_FLOW_OK;
-
- filter->process (filter, GST_BUFFER_DATA (buf), num_samples);
-
- return GST_FLOW_OK;
-}