From 989c9a7317354a538aef7c3ed35cf995a9afc6e1 Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Mon, 7 Jan 2013 10:12:51 +0100 Subject: filter/replay_gain: convert to C++ --- src/filter/replay_gain_filter_plugin.c | 251 --------------------------------- 1 file changed, 251 deletions(-) delete mode 100644 src/filter/replay_gain_filter_plugin.c (limited to 'src/filter/replay_gain_filter_plugin.c') diff --git a/src/filter/replay_gain_filter_plugin.c b/src/filter/replay_gain_filter_plugin.c deleted file mode 100644 index 9fd3cbc07..000000000 --- a/src/filter/replay_gain_filter_plugin.c +++ /dev/null @@ -1,251 +0,0 @@ -/* - * Copyright (C) 2003-2011 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. - */ - -#include "config.h" -#include "filter/replay_gain_filter_plugin.h" -#include "filter_plugin.h" -#include "filter_internal.h" -#include "filter_registry.h" -#include "audio_format.h" -#include "pcm_buffer.h" -#include "pcm_volume.h" -#include "replay_gain_info.h" -#include "replay_gain_config.h" -#include "mixer_control.h" - -#include -#include - -#undef G_LOG_DOMAIN -#define G_LOG_DOMAIN "replay_gain" - -struct replay_gain_filter { - struct filter filter; - - /** - * If set, then this hardware mixer is used for applying - * replay gain, instead of the software volume library. - */ - struct mixer *mixer; - - /** - * The base volume level for scale=1.0, between 1 and 100 - * (including). - */ - unsigned base; - - enum replay_gain_mode mode; - - struct replay_gain_info info; - - /** - * The current volume, between 0 and a value that may or may not exceed - * #PCM_VOLUME_1. - * - * If the default value of true is used for replaygain_limit, the - * application of the volume to the signal will never cause clipping. - * - * On the other hand, if the user has set replaygain_limit to false, - * the chance of clipping is explicitly preferred if that's required to - * maintain a consistent audio level. Whether clipping will actually - * occur depends on what value the user is using for replaygain_preamp. - */ - unsigned volume; - - struct audio_format audio_format; - - struct pcm_buffer buffer; -}; - -static inline GQuark -replay_gain_quark(void) -{ - return g_quark_from_static_string("replay_gain"); -} - -/** - * Recalculates the new volume after a property was changed. - */ -static void -replay_gain_filter_update(struct replay_gain_filter *filter) -{ - if (filter->mode != REPLAY_GAIN_OFF) { - float scale = replay_gain_tuple_scale(&filter->info.tuples[filter->mode], - replay_gain_preamp, replay_gain_missing_preamp, replay_gain_limit); - g_debug("scale=%f\n", (double)scale); - - filter->volume = pcm_float_to_volume(scale); - } else - filter->volume = PCM_VOLUME_1; - - if (filter->mixer != NULL) { - /* update the hardware mixer volume */ - - unsigned volume = (filter->volume * filter->base) / PCM_VOLUME_1; - if (volume > 100) - volume = 100; - - GError *error = NULL; - if (!mixer_set_volume(filter->mixer, volume, &error)) { - g_warning("Failed to update hardware mixer: %s", - error->message); - g_error_free(error); - } - } -} - -static struct filter * -replay_gain_filter_init(G_GNUC_UNUSED const struct config_param *param, - G_GNUC_UNUSED GError **error_r) -{ - struct replay_gain_filter *filter = g_new(struct replay_gain_filter, 1); - - filter_init(&filter->filter, &replay_gain_filter_plugin); - filter->mixer = NULL; - - filter->mode = REPLAY_GAIN_OFF; - replay_gain_info_init(&filter->info); - filter->volume = PCM_VOLUME_1; - - return &filter->filter; -} - -static void -replay_gain_filter_finish(struct filter *filter) -{ - g_free(filter); -} - -static const struct audio_format * -replay_gain_filter_open(struct filter *_filter, - struct audio_format *audio_format, - G_GNUC_UNUSED GError **error_r) -{ - struct replay_gain_filter *filter = - (struct replay_gain_filter *)_filter; - - filter->audio_format = *audio_format; - pcm_buffer_init(&filter->buffer); - - return &filter->audio_format; -} - -static void -replay_gain_filter_close(struct filter *_filter) -{ - struct replay_gain_filter *filter = - (struct replay_gain_filter *)_filter; - - pcm_buffer_deinit(&filter->buffer); -} - -static const void * -replay_gain_filter_filter(struct filter *_filter, - const void *src, size_t src_size, - size_t *dest_size_r, GError **error_r) -{ - struct replay_gain_filter *filter = - (struct replay_gain_filter *)_filter; - bool success; - void *dest; - - *dest_size_r = src_size; - - if (filter->volume == PCM_VOLUME_1) - /* optimized special case: 100% volume = no-op */ - return src; - - dest = pcm_buffer_get(&filter->buffer, src_size); - - if (filter->volume <= 0) { - /* optimized special case: 0% volume = memset(0) */ - /* XXX is this valid for all sample formats? What - about floating point? */ - memset(dest, 0, src_size); - return dest; - } - - memcpy(dest, src, src_size); - - success = pcm_volume(dest, src_size, filter->audio_format.format, - filter->volume); - if (!success) { - g_set_error(error_r, replay_gain_quark(), 0, - "pcm_volume() has failed"); - return NULL; - } - - return dest; -} - -const struct filter_plugin replay_gain_filter_plugin = { - .name = "replay_gain", - .init = replay_gain_filter_init, - .finish = replay_gain_filter_finish, - .open = replay_gain_filter_open, - .close = replay_gain_filter_close, - .filter = replay_gain_filter_filter, -}; - -void -replay_gain_filter_set_mixer(struct filter *_filter, struct mixer *mixer, - unsigned base) -{ - struct replay_gain_filter *filter = - (struct replay_gain_filter *)_filter; - - assert(mixer == NULL || (base > 0 && base <= 100)); - - filter->mixer = mixer; - filter->base = base; - - replay_gain_filter_update(filter); -} - -void -replay_gain_filter_set_info(struct filter *_filter, - const struct replay_gain_info *info) -{ - struct replay_gain_filter *filter = - (struct replay_gain_filter *)_filter; - - if (info != NULL) { - filter->info = *info; - replay_gain_info_complete(&filter->info); - } else - replay_gain_info_init(&filter->info); - - replay_gain_filter_update(filter); -} - -void -replay_gain_filter_set_mode(struct filter *_filter, enum replay_gain_mode mode) -{ - struct replay_gain_filter *filter = - (struct replay_gain_filter *)_filter; - - if (mode == filter->mode) - /* no change */ - return; - - g_debug("replay gain mode has changed %d->%d\n", filter->mode, mode); - - filter->mode = mode; - replay_gain_filter_update(filter); -} -- cgit v1.2.3