filter: added normalize filter plugin
Wrap the AudioCompress library in a filter plugin.
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@ -706,6 +706,7 @@ FILTER_SRC = \
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src/filter/chain_filter_plugin.c \
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src/filter/convert_filter_plugin.c \
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src/filter/route_filter_plugin.c \
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src/filter/normalize_filter_plugin.c \
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src/filter/volume_filter_plugin.c
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@ -843,6 +844,7 @@ test_run_filter_SOURCES = test/run_filter.c \
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src/audio_check.c \
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src/audio_format.c \
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src/audio_parser.c \
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src/AudioCompress/compress.c \
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$(FILTER_SRC)
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if HAVE_LIBSAMPLERATE
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123
src/filter/normalize_filter_plugin.c
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123
src/filter/normalize_filter_plugin.c
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@ -0,0 +1,123 @@
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/*
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* Copyright (C) 2003-2009 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "filter_plugin.h"
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#include "filter_internal.h"
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#include "filter_registry.h"
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#include "pcm_buffer.h"
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#include "audio_format.h"
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#include "AudioCompress/compress.h"
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#include <assert.h>
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#include <string.h>
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struct normalize_filter {
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struct filter filter;
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struct Compressor *compressor;
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struct pcm_buffer buffer;
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};
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static inline GQuark
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normalize_quark(void)
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{
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return g_quark_from_static_string("normalize");
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}
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static struct filter *
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normalize_filter_init(G_GNUC_UNUSED const struct config_param *param,
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G_GNUC_UNUSED GError **error_r)
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{
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struct normalize_filter *filter = g_new(struct normalize_filter, 1);
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filter_init(&filter->filter, &normalize_filter_plugin);
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return &filter->filter;
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}
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static void
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normalize_filter_finish(struct filter *filter)
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{
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g_free(filter);
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}
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static const struct audio_format *
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normalize_filter_open(struct filter *_filter,
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const struct audio_format *audio_format,
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GError **error_r)
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{
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struct normalize_filter *filter = (struct normalize_filter *)_filter;
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if (audio_format->format != SAMPLE_FORMAT_S16) {
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g_set_error(error_r, normalize_quark(), 0,
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"Unsupported audio format");
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return false;
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}
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if (audio_format->reverse_endian) {
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g_set_error(error_r, normalize_quark(), 0,
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"Normalize for reverse endian "
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"samples is not implemented");
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return false;
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}
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filter->compressor = Compressor_new(0);
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pcm_buffer_init(&filter->buffer);
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return audio_format;
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}
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static void
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normalize_filter_close(struct filter *_filter)
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{
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struct normalize_filter *filter = (struct normalize_filter *)_filter;
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pcm_buffer_deinit(&filter->buffer);
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Compressor_delete(filter->compressor);
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}
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static const void *
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normalize_filter_filter(struct filter *_filter,
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const void *src, size_t src_size, size_t *dest_size_r,
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G_GNUC_UNUSED GError **error_r)
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{
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struct normalize_filter *filter = (struct normalize_filter *)_filter;
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void *dest;
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dest = pcm_buffer_get(&filter->buffer, src_size);
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memcpy(dest, src, src_size);
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Compressor_Process_int16(filter->compressor, dest, src_size / 2);
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*dest_size_r = src_size;
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return dest;
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}
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const struct filter_plugin normalize_filter_plugin = {
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.name = "normalize",
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.init = normalize_filter_init,
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.finish = normalize_filter_finish,
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.open = normalize_filter_open,
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.close = normalize_filter_close,
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.filter = normalize_filter_filter,
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};
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@ -28,6 +28,7 @@ const struct filter_plugin *const filter_plugins[] = {
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&null_filter_plugin,
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&chain_filter_plugin,
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&route_filter_plugin,
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&normalize_filter_plugin,
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&volume_filter_plugin,
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NULL,
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};
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@ -30,6 +30,7 @@ extern const struct filter_plugin null_filter_plugin;
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extern const struct filter_plugin chain_filter_plugin;
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extern const struct filter_plugin convert_filter_plugin;
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extern const struct filter_plugin route_filter_plugin;
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extern const struct filter_plugin normalize_filter_plugin;
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extern const struct filter_plugin volume_filter_plugin;
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const struct filter_plugin *
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