2009-03-13 18:43:16 +01:00
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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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2004-05-08 14:04:23 +02:00
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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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2009-03-13 18:43:16 +01:00
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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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/*
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* (c)2004 replayGain code by AliasMrJones
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2004-05-08 14:04:23 +02:00
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*/
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2004-05-08 00:42:54 +02:00
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2008-11-11 15:55:34 +01:00
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#include "replay_gain.h"
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2004-05-08 00:42:54 +02:00
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#include "conf.h"
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2008-09-07 19:19:55 +02:00
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#include "audio_format.h"
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2009-01-07 18:05:38 +01:00
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#include "pcm_volume.h"
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2009-11-01 15:44:56 +01:00
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#include "idle.h"
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2006-07-20 18:02:40 +02:00
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2008-11-11 16:24:27 +01:00
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#include <glib.h>
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2009-10-17 22:40:50 +02:00
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#include <assert.h>
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2008-11-11 16:38:33 +01:00
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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2008-11-11 16:24:27 +01:00
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static const char *const replay_gain_mode_names[] = {
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[REPLAY_GAIN_ALBUM] = "album",
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[REPLAY_GAIN_TRACK] = "track",
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};
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2008-11-11 16:18:31 +01:00
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enum replay_gain_mode replay_gain_mode = REPLAY_GAIN_OFF;
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2004-05-08 00:42:54 +02:00
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2008-11-11 15:55:34 +01:00
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static float replay_gain_preamp = 1.0;
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2009-06-19 09:02:12 +02:00
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static float replay_gain_missing_preamp = 1.0;
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2004-07-17 16:54:22 +02:00
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2009-10-17 22:58:19 +02:00
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const char *
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replay_gain_get_mode_string(void)
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{
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switch (replay_gain_mode) {
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case REPLAY_GAIN_OFF:
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return "off";
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case REPLAY_GAIN_TRACK:
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return "track";
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case REPLAY_GAIN_ALBUM:
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return "album";
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}
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/* unreachable */
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assert(false);
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return "off";
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}
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bool
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2009-10-17 22:40:50 +02:00
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replay_gain_set_mode_string(const char *p)
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2006-07-20 18:02:40 +02:00
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{
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2009-10-17 22:40:50 +02:00
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assert(p != NULL);
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2004-05-08 00:42:54 +02:00
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2009-10-17 22:40:50 +02:00
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if (strcmp(p, "off") == 0)
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2009-10-17 21:38:32 +02:00
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replay_gain_mode = REPLAY_GAIN_OFF;
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2009-10-17 22:40:50 +02:00
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else if (strcmp(p, "track") == 0)
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2008-11-11 15:55:34 +01:00
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replay_gain_mode = REPLAY_GAIN_TRACK;
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2009-10-17 22:40:50 +02:00
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else if (strcmp(p, "album") == 0)
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2008-11-11 15:55:34 +01:00
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replay_gain_mode = REPLAY_GAIN_ALBUM;
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2009-10-17 22:40:50 +02:00
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else
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return false;
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2009-11-01 15:44:56 +01:00
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idle_add(IDLE_OPTIONS);
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2009-10-17 22:40:50 +02:00
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return true;
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}
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void replay_gain_global_init(void)
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{
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const struct config_param *param = config_get_param(CONF_REPLAYGAIN);
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if (param != NULL && !replay_gain_set_mode_string(param->value)) {
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2008-11-11 16:38:26 +01:00
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g_error("replaygain value \"%s\" at line %i is invalid\n",
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param->value, param->line);
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2004-05-08 00:42:54 +02:00
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}
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2004-07-17 16:54:22 +02:00
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2009-01-17 20:23:27 +01:00
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param = config_get_param(CONF_REPLAYGAIN_PREAMP);
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2004-10-28 07:14:55 +02:00
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2006-07-20 18:02:40 +02:00
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if (param) {
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char *test;
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2004-10-28 07:14:55 +02:00
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float f = strtod(param->value, &test);
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2004-07-17 16:54:22 +02:00
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2006-07-20 18:02:40 +02:00
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if (*test != '\0') {
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2008-11-11 16:38:26 +01:00
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g_error("Replaygain preamp \"%s\" is not a number at "
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"line %i\n", param->value, param->line);
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2004-07-17 16:54:22 +02:00
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}
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2006-07-20 18:02:40 +02:00
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if (f < -15 || f > 15) {
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2008-11-11 16:38:26 +01:00
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g_error("Replaygain preamp \"%s\" is not between -15 and"
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"15 at line %i\n", param->value, param->line);
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2004-07-17 16:54:22 +02:00
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}
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2008-11-11 15:55:34 +01:00
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replay_gain_preamp = pow(10, f / 20.0);
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2004-07-17 16:54:22 +02:00
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}
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2009-06-19 09:02:12 +02:00
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param = config_get_param(CONF_REPLAYGAIN_MISSING_PREAMP);
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if (param) {
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char *test;
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float f = strtod(param->value, &test);
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if (*test != '\0') {
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g_error("Replaygain missing preamp \"%s\" is not a number at "
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"line %i\n", param->value, param->line);
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}
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if (f < -15 || f > 15) {
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g_error("Replaygain missing preamp \"%s\" is not between -15 and"
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"15 at line %i\n", param->value, param->line);
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}
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replay_gain_missing_preamp = pow(10, f / 20.0);
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}
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2004-05-08 00:42:54 +02:00
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}
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2008-11-11 15:55:34 +01:00
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static float calc_replay_gain_scale(float gain, float peak)
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2006-07-20 18:02:40 +02:00
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{
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2004-05-08 00:42:54 +02:00
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float scale;
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2006-07-20 18:02:40 +02:00
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if (gain == 0.0)
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return (1);
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scale = pow(10.0, gain / 20.0);
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2008-11-11 15:55:34 +01:00
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scale *= replay_gain_preamp;
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2006-07-20 18:02:40 +02:00
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if (scale > 15.0)
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scale = 15.0;
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2004-05-08 00:42:54 +02:00
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if (scale * peak > 1.0) {
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scale = 1.0 / peak;
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}
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2006-07-20 18:02:40 +02:00
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return (scale);
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2004-05-08 00:42:54 +02:00
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}
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2008-11-11 15:55:34 +01:00
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struct replay_gain_info *replay_gain_info_new(void)
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2006-07-20 18:02:40 +02:00
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{
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2008-11-11 16:38:26 +01:00
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struct replay_gain_info *ret = g_new(struct replay_gain_info, 1);
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2004-11-02 20:56:59 +01:00
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2008-11-11 16:24:27 +01:00
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for (unsigned i = 0; i < G_N_ELEMENTS(ret->tuples); ++i) {
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ret->tuples[i].gain = 0.0;
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ret->tuples[i].peak = 0.0;
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}
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2004-11-02 20:56:59 +01:00
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2008-11-11 15:55:34 +01:00
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/* set to -1 so that we know in replay_gain_apply to compute the scale */
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2004-11-02 20:56:59 +01:00
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ret->scale = -1.0;
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return ret;
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}
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2008-11-11 15:55:34 +01:00
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void replay_gain_info_free(struct replay_gain_info *info)
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2006-07-20 18:02:40 +02:00
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{
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2008-11-11 16:38:26 +01:00
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g_free(info);
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2004-11-02 20:56:59 +01:00
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}
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2008-11-11 15:55:34 +01:00
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void
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replay_gain_apply(struct replay_gain_info *info, char *buffer, int size,
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2008-09-07 19:19:55 +02:00
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const struct audio_format *format)
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2004-05-08 00:42:54 +02:00
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{
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2009-06-19 09:02:12 +02:00
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float scale;
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if (replay_gain_mode == REPLAY_GAIN_OFF)
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2006-07-20 18:02:40 +02:00
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return;
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2004-11-02 20:56:59 +01:00
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2009-06-19 09:02:12 +02:00
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if (info) {
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if (info->scale < 0) {
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const struct replay_gain_tuple *tuple =
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&info->tuples[replay_gain_mode];
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2008-11-11 16:24:27 +01:00
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2009-06-19 09:02:12 +02:00
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g_debug("computing ReplayGain %s scale with gain %f, peak %f\n",
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replay_gain_mode_names[replay_gain_mode],
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tuple->gain, tuple->peak);
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2008-11-11 16:24:27 +01:00
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2009-06-19 09:02:12 +02:00
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info->scale = calc_replay_gain_scale(tuple->gain, tuple->peak);
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}
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scale = info->scale;
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}
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else {
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scale = replay_gain_missing_preamp;
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g_debug("ReplayGain is missing, computing scale %f\n", scale);
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2004-11-02 20:56:59 +01:00
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}
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2009-06-19 09:02:12 +02:00
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pcm_volume(buffer, size, format, pcm_float_to_volume(scale));
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2004-05-08 00:42:54 +02:00
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}
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