diff options
Diffstat (limited to 'src/replay_gain.c')
| -rw-r--r-- | src/replay_gain.c | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/src/replay_gain.c b/src/replay_gain.c deleted file mode 100644 index bcb501e54..000000000 --- a/src/replay_gain.c +++ /dev/null @@ -1,134 +0,0 @@ -/* - * Copyright (C) 2003-2009 The Music Player Daemon Project - * http://www.musicpd.org - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ -/* - * (c)2004 replayGain code by AliasMrJones - */ - -#include "replay_gain.h" -#include "conf.h" -#include "audio_format.h" -#include "pcm_volume.h" - -#include <glib.h> -#include <stdlib.h> -#include <string.h> -#include <math.h> - -static const char *const replay_gain_mode_names[] = { - [REPLAY_GAIN_ALBUM] = "album", - [REPLAY_GAIN_TRACK] = "track", -}; - -enum replay_gain_mode replay_gain_mode = REPLAY_GAIN_OFF; - -static float replay_gain_preamp = 1.0; - -void replay_gain_global_init(void) -{ - const struct config_param *param = config_get_param(CONF_REPLAYGAIN); - - if (!param) - return; - - if (strcmp(param->value, "track") == 0) { - replay_gain_mode = REPLAY_GAIN_TRACK; - } else if (strcmp(param->value, "album") == 0) { - replay_gain_mode = REPLAY_GAIN_ALBUM; - } else { - g_error("replaygain value \"%s\" at line %i is invalid\n", - param->value, param->line); - } - - param = config_get_param(CONF_REPLAYGAIN_PREAMP); - - if (param) { - char *test; - float f = strtod(param->value, &test); - - if (*test != '\0') { - g_error("Replaygain preamp \"%s\" is not a number at " - "line %i\n", param->value, param->line); - } - - if (f < -15 || f > 15) { - g_error("Replaygain preamp \"%s\" is not between -15 and" - "15 at line %i\n", param->value, param->line); - } - - replay_gain_preamp = pow(10, f / 20.0); - } -} - -static float calc_replay_gain_scale(float gain, float peak) -{ - float scale; - - if (gain == 0.0) - return (1); - scale = pow(10.0, gain / 20.0); - scale *= replay_gain_preamp; - if (scale > 15.0) - scale = 15.0; - - if (scale * peak > 1.0) { - scale = 1.0 / peak; - } - return (scale); -} - -struct replay_gain_info *replay_gain_info_new(void) -{ - struct replay_gain_info *ret = g_new(struct replay_gain_info, 1); - - for (unsigned i = 0; i < G_N_ELEMENTS(ret->tuples); ++i) { - ret->tuples[i].gain = 0.0; - ret->tuples[i].peak = 0.0; - } - - /* set to -1 so that we know in replay_gain_apply to compute the scale */ - ret->scale = -1.0; - - return ret; -} - -void replay_gain_info_free(struct replay_gain_info *info) -{ - g_free(info); -} - -void -replay_gain_apply(struct replay_gain_info *info, char *buffer, int size, - const struct audio_format *format) -{ - if (replay_gain_mode == REPLAY_GAIN_OFF || !info) - return; - - if (info->scale < 0) { - const struct replay_gain_tuple *tuple = - &info->tuples[replay_gain_mode]; - - g_debug("computing ReplayGain %s scale with gain %f, peak %f\n", - replay_gain_mode_names[replay_gain_mode], - tuple->gain, tuple->peak); - - info->scale = calc_replay_gain_scale(tuple->gain, tuple->peak); - } - - pcm_volume(buffer, size, format, pcm_float_to_volume(info->scale)); -} |