diff options
Diffstat (limited to 'src/filter/VolumeFilterPlugin.cxx')
-rw-r--r-- | src/filter/VolumeFilterPlugin.cxx | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/src/filter/VolumeFilterPlugin.cxx b/src/filter/VolumeFilterPlugin.cxx deleted file mode 100644 index 1b663f6eb..000000000 --- a/src/filter/VolumeFilterPlugin.cxx +++ /dev/null @@ -1,143 +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 "VolumeFilterPlugin.hxx" -#include "FilterPlugin.hxx" -#include "FilterInternal.hxx" -#include "FilterRegistry.hxx" -#include "pcm/PcmVolume.hxx" -#include "pcm/PcmBuffer.hxx" -#include "AudioFormat.hxx" -#include "util/Error.hxx" -#include "util/Domain.hxx" - -#include <assert.h> -#include <string.h> - -class VolumeFilter final : public Filter { - /** - * The current volume, from 0 to #PCM_VOLUME_1. - */ - unsigned volume; - - AudioFormat format; - - PcmBuffer buffer; - -public: - VolumeFilter() - :volume(PCM_VOLUME_1) {} - - unsigned GetVolume() const { - assert(volume <= PCM_VOLUME_1); - - return volume; - } - - void SetVolume(unsigned _volume) { - assert(_volume <= PCM_VOLUME_1); - - volume = _volume; - } - - 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); -}; - -static constexpr Domain volume_domain("pcm_volume"); - -static Filter * -volume_filter_init(gcc_unused const config_param ¶m, - gcc_unused Error &error) -{ - return new VolumeFilter(); -} - -AudioFormat -VolumeFilter::Open(AudioFormat &audio_format, gcc_unused Error &error) -{ - format = audio_format; - - return format; -} - -void -VolumeFilter::Close() -{ - buffer.Clear(); -} - -const void * -VolumeFilter::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(volume_domain, "pcm_volume() has failed"); - return NULL; - } - - return dest; -} - -const struct filter_plugin volume_filter_plugin = { - "volume", - volume_filter_init, -}; - -unsigned -volume_filter_get(const Filter *_filter) -{ - const VolumeFilter *filter = - (const VolumeFilter *)_filter; - - return filter->GetVolume(); -} - -void -volume_filter_set(Filter *_filter, unsigned volume) -{ - VolumeFilter *filter = (VolumeFilter *)_filter; - - filter->SetVolume(volume); -} - |