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Diffstat (limited to '')
| -rw-r--r-- | src/filter/ReplayGainFilterPlugin.cxx | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/src/filter/ReplayGainFilterPlugin.cxx b/src/filter/ReplayGainFilterPlugin.cxx deleted file mode 100644 index b2dcde4cc..000000000 --- a/src/filter/ReplayGainFilterPlugin.cxx +++ /dev/null @@ -1,235 +0,0 @@ -/* - * Copyright (C) 2003-2013 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 "ReplayGainFilterPlugin.hxx" -#include "FilterPlugin.hxx" -#include "FilterInternal.hxx" -#include "FilterRegistry.hxx" -#include "AudioFormat.hxx" -#include "ReplayGainInfo.hxx" -#include "ReplayGainConfig.hxx" -#include "MixerControl.hxx" -#include "pcm/PcmVolume.hxx" -#include "pcm/PcmBuffer.hxx" -#include "util/Error.hxx" -#include "util/Domain.hxx" -#include "Log.hxx" - -#include <assert.h> -#include <string.h> - -static constexpr Domain replay_gain_domain("replay_gain"); - -class ReplayGainFilter final : public Filter { - /** - * If set, then this hardware mixer is used for applying - * replay gain, instead of the software volume library. - */ - Mixer *mixer; - - /** - * The base volume level for scale=1.0, between 1 and 100 - * (including). - */ - unsigned base; - - ReplayGainMode mode; - - ReplayGainInfo 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; - - AudioFormat format; - - PcmBuffer buffer; - -public: - ReplayGainFilter() - :mixer(nullptr), mode(REPLAY_GAIN_OFF), - volume(PCM_VOLUME_1) { - info.Clear(); - } - - void SetMixer(Mixer *_mixer, unsigned _base) { - assert(_mixer == nullptr || (_base > 0 && _base <= 100)); - - mixer = _mixer; - base = _base; - - Update(); - } - - void SetInfo(const ReplayGainInfo *_info) { - if (_info != nullptr) { - info = *_info; - info.Complete(); - } else - info.Clear(); - - Update(); - } - - void SetMode(ReplayGainMode _mode) { - if (_mode == mode) - /* no change */ - return; - - FormatDebug(replay_gain_domain, - "replay gain mode has changed %d->%d\n", - mode, _mode); - - mode = _mode; - Update(); - } - - /** - * Recalculates the new volume after a property was changed. - */ - void Update(); - - virtual AudioFormat Open(AudioFormat &af, Error &error) override; - virtual void Close(); - virtual const void *FilterPCM(const void *src, size_t src_size, - size_t *dest_size_r, Error &error); -}; - -void -ReplayGainFilter::Update() -{ - if (mode != REPLAY_GAIN_OFF) { - const auto &tuple = info.tuples[mode]; - float scale = tuple.CalculateScale(replay_gain_preamp, - replay_gain_missing_preamp, - replay_gain_limit); - FormatDebug(replay_gain_domain, - "scale=%f\n", (double)scale); - - volume = pcm_float_to_volume(scale); - } else - volume = PCM_VOLUME_1; - - if (mixer != nullptr) { - /* update the hardware mixer volume */ - - unsigned _volume = (volume * base) / PCM_VOLUME_1; - if (_volume > 100) - _volume = 100; - - Error error; - if (!mixer_set_volume(mixer, _volume, error)) - LogError(error, "Failed to update hardware mixer"); - } -} - -static Filter * -replay_gain_filter_init(gcc_unused const config_param ¶m, - gcc_unused Error &error) -{ - return new ReplayGainFilter(); -} - -AudioFormat -ReplayGainFilter::Open(AudioFormat &af, gcc_unused Error &error) -{ - format = af; - - return format; -} - -void -ReplayGainFilter::Close() -{ - buffer.Clear(); -} - -const void * -ReplayGainFilter::FilterPCM(const void *src, size_t src_size, - size_t *dest_size_r, Error &error) -{ - - *dest_size_r = src_size; - - if (volume == PCM_VOLUME_1) - /* optimized special case: 100% volume = no-op */ - return src; - - void *dest = buffer.Get(src_size); - if (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); - - bool success = pcm_volume(dest, src_size, - format.format, - volume); - if (!success) { - error.Set(replay_gain_domain, "pcm_volume() has failed"); - return nullptr; - } - - return dest; -} - -const struct filter_plugin replay_gain_filter_plugin = { - "replay_gain", - replay_gain_filter_init, -}; - -void -replay_gain_filter_set_mixer(Filter *_filter, Mixer *mixer, - unsigned base) -{ - ReplayGainFilter *filter = (ReplayGainFilter *)_filter; - - filter->SetMixer(mixer, base); -} - -void -replay_gain_filter_set_info(Filter *_filter, const ReplayGainInfo *info) -{ - ReplayGainFilter *filter = (ReplayGainFilter *)_filter; - - filter->SetInfo(info); -} - -void -replay_gain_filter_set_mode(Filter *_filter, ReplayGainMode mode) -{ - ReplayGainFilter *filter = (ReplayGainFilter *)_filter; - - filter->SetMode(mode); -} |