diff -r 29ecd5cb86b3 -r d43ce56a1534 gst_plugins_good/gst/audiofx/audiokaraoke.c --- a/gst_plugins_good/gst/audiofx/audiokaraoke.c Tue Jul 06 14:35:10 2010 +0300 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,357 +0,0 @@ -/* - * GStreamer - * Copyright (C) 2008 Wim Taymans - * - * 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-audiokaraoke - * - * Remove the voice from audio by filtering the center channel. - * This plugin is useful for karaoke applications. - * - * - * Example launch line - * |[ - * gst-launch filesrc location=song.ogg ! oggdemux ! vorbisdec ! audiokaraoke ! audioconvert ! alsasink - * ]| - * - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include - -#include -#include -#include -#include -#include - -#include "audiokaraoke.h" - -#define GST_CAT_DEFAULT gst_audio_karaoke_debug -GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT); - -static const GstElementDetails element_details = -GST_ELEMENT_DETAILS ("AudioKaraoke", - "Filter/Effect/Audio", - "Removes voice from sound", - "Wim Taymans "); - -/* Filter signals and args */ -enum -{ - /* FILL ME */ - LAST_SIGNAL -}; - -#define DEFAULT_LEVEL 1.0 -#define DEFAULT_MONO_LEVEL 1.0 -#define DEFAULT_FILTER_BAND 220.0 -#define DEFAULT_FILTER_WIDTH 100.0 - -enum -{ - PROP_0, - PROP_LEVEL, - PROP_MONO_LEVEL, - PROP_FILTER_BAND, - PROP_FILTER_WIDTH, - PROP_LAST -}; - -#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_karaoke_debug, "audiokaraoke", 0, "audiokaraoke element"); - -GST_BOILERPLATE_FULL (GstAudioKaraoke, gst_audio_karaoke, GstAudioFilter, - GST_TYPE_AUDIO_FILTER, DEBUG_INIT); - -static void gst_audio_karaoke_set_property (GObject * object, guint prop_id, - const GValue * value, GParamSpec * pspec); -static void gst_audio_karaoke_get_property (GObject * object, guint prop_id, - GValue * value, GParamSpec * pspec); - -static gboolean gst_audio_karaoke_setup (GstAudioFilter * filter, - GstRingBufferSpec * format); -static GstFlowReturn gst_audio_karaoke_transform_ip (GstBaseTransform * base, - GstBuffer * buf); - -static void gst_audio_karaoke_transform_int (GstAudioKaraoke * filter, - gint16 * data, guint num_samples); -static void gst_audio_karaoke_transform_float (GstAudioKaraoke * filter, - gfloat * data, guint num_samples); - -/* GObject vmethod implementations */ - -static void -gst_audio_karaoke_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_karaoke_class_init (GstAudioKaraokeClass * klass) -{ - GObjectClass *gobject_class; - - gobject_class = (GObjectClass *) klass; - gobject_class->set_property = gst_audio_karaoke_set_property; - gobject_class->get_property = gst_audio_karaoke_get_property; - - g_object_class_install_property (gobject_class, PROP_LEVEL, - g_param_spec_float ("level", "Level", - "Level of the effect (1.0 = full)", 0.0, 1.0, DEFAULT_LEVEL, - G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); - - g_object_class_install_property (gobject_class, PROP_MONO_LEVEL, - g_param_spec_float ("mono-level", "Mono Level", - "Level of the mono channel (1.0 = full)", 0.0, 1.0, DEFAULT_LEVEL, - G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); - - g_object_class_install_property (gobject_class, PROP_FILTER_BAND, - g_param_spec_float ("filter-band", "Filter Band", - "The Frequency band of the filter", 0.0, 441.0, DEFAULT_FILTER_BAND, - G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); - - g_object_class_install_property (gobject_class, PROP_FILTER_WIDTH, - g_param_spec_float ("filter-width", "Filter Width", - "The Frequency width of the filter", 0.0, 100.0, DEFAULT_FILTER_WIDTH, - G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); - - GST_AUDIO_FILTER_CLASS (klass)->setup = - GST_DEBUG_FUNCPTR (gst_audio_karaoke_setup); - GST_BASE_TRANSFORM_CLASS (klass)->transform_ip = - GST_DEBUG_FUNCPTR (gst_audio_karaoke_transform_ip); -} - -static void -gst_audio_karaoke_init (GstAudioKaraoke * filter, GstAudioKaraokeClass * klass) -{ - gst_base_transform_set_in_place (GST_BASE_TRANSFORM (filter), TRUE); - gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM (filter), TRUE); - - filter->level = DEFAULT_LEVEL; - filter->mono_level = DEFAULT_MONO_LEVEL; - filter->filter_band = DEFAULT_FILTER_BAND; - filter->filter_width = DEFAULT_FILTER_WIDTH; -} - -static void -update_filter (GstAudioKaraoke * filter, gint rate) -{ - gfloat A, B, C; - - if (rate == 0) - return; - - C = exp (-2 * M_PI * filter->filter_width / rate); - B = -4 * C / (1 + C) * cos (2 * M_PI * filter->filter_band / rate); - A = sqrt (1 - B * B / (4 * C)) * (1 - C); - - filter->A = A; - filter->B = B; - filter->C = C; - filter->y1 = 0.0; - filter->y2 = 0.0; -} - -static void -gst_audio_karaoke_set_property (GObject * object, guint prop_id, - const GValue * value, GParamSpec * pspec) -{ - GstAudioKaraoke *filter; - - filter = GST_AUDIO_KARAOKE (object); - - switch (prop_id) { - case PROP_LEVEL: - filter->level = g_value_get_float (value); - break; - case PROP_MONO_LEVEL: - filter->mono_level = g_value_get_float (value); - break; - case PROP_FILTER_BAND: - filter->filter_band = g_value_get_float (value); - update_filter (filter, filter->rate); - break; - case PROP_FILTER_WIDTH: - filter->filter_width = g_value_get_float (value); - update_filter (filter, filter->rate); - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); - break; - } -} - -static void -gst_audio_karaoke_get_property (GObject * object, guint prop_id, - GValue * value, GParamSpec * pspec) -{ - GstAudioKaraoke *filter; - - filter = GST_AUDIO_KARAOKE (object); - - switch (prop_id) { - case PROP_LEVEL: - g_value_set_float (value, filter->level); - break; - case PROP_MONO_LEVEL: - g_value_set_float (value, filter->mono_level); - break; - case PROP_FILTER_BAND: - g_value_set_float (value, filter->filter_band); - break; - case PROP_FILTER_WIDTH: - g_value_set_float (value, filter->filter_width); - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); - break; - } -} - -/* GstAudioFilter vmethod implementations */ - -static gboolean -gst_audio_karaoke_setup (GstAudioFilter * base, GstRingBufferSpec * format) -{ - GstAudioKaraoke *filter = GST_AUDIO_KARAOKE (base); - gboolean ret = TRUE; - - filter->channels = format->channels; - filter->rate = format->rate; - - if (format->type == GST_BUFTYPE_FLOAT && format->width == 32) - filter->process = (GstAudioKaraokeProcessFunc) - gst_audio_karaoke_transform_float; - else if (format->type == GST_BUFTYPE_LINEAR && format->width == 16) - filter->process = (GstAudioKaraokeProcessFunc) - gst_audio_karaoke_transform_int; - else - ret = FALSE; - - update_filter (filter, format->rate); - - return ret; -} - -static void -gst_audio_karaoke_transform_int (GstAudioKaraoke * filter, - gint16 * data, guint num_samples) -{ - gint i, l, r, o, x; - gint channels; - gdouble y; - gint level; - - channels = filter->channels; - level = filter->level * 256; - - for (i = 0; i < num_samples; i += channels) { - /* get left and right inputs */ - l = data[i]; - r = data[i + 1]; - /* do filtering */ - x = (l + r) / 2; - y = (filter->A * x - filter->B * filter->y1) - filter->C * filter->y2; - filter->y2 = filter->y1; - filter->y1 = y; - /* filter mono signal */ - o = (int) (y * filter->mono_level); - o = CLAMP (o, G_MININT16, G_MAXINT16); - o = (o * level) >> 8; - /* now cut the center */ - x = l - ((r * level) >> 8) + o; - r = r - ((l * level) >> 8) + o; - data[i] = CLAMP (x, G_MININT16, G_MAXINT16); - data[i + 1] = CLAMP (r, G_MININT16, G_MAXINT16); - } -} - -static void -gst_audio_karaoke_transform_float (GstAudioKaraoke * filter, - gfloat * data, guint num_samples) -{ - gint i; - gint channels; - gdouble l, r, o; - gdouble y; - - channels = filter->channels; - - for (i = 0; i < num_samples; i += channels) { - /* get left and right inputs */ - l = data[i]; - r = data[i + 1]; - /* do filtering */ - y = (filter->A * ((l + r) / 2.0) - filter->B * filter->y1) - - filter->C * filter->y2; - filter->y2 = filter->y1; - filter->y1 = y; - /* filter mono signal */ - o = y * filter->mono_level * filter->level; - /* now cut the center */ - data[i] = l - (r * filter->level) + o; - data[i + 1] = r - (l * filter->level) + o; - } -} - -/* GstBaseTransform vmethod implementations */ -static GstFlowReturn -gst_audio_karaoke_transform_ip (GstBaseTransform * base, GstBuffer * buf) -{ - GstAudioKaraoke *filter = GST_AUDIO_KARAOKE (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; -}