127 lines
3.1 KiB
C++
127 lines
3.1 KiB
C++
/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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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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*
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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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#include "config.h"
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#include "AutoConvertFilterPlugin.hxx"
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#include "ConvertFilterPlugin.hxx"
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#include "FilterPlugin.hxx"
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#include "FilterInternal.hxx"
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#include "FilterRegistry.hxx"
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#include "AudioFormat.hxx"
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#include "ConfigData.hxx"
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#include <assert.h>
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class AutoConvertFilter final : public Filter {
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/**
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* The underlying filter.
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*/
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Filter *filter;
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/**
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* A convert_filter, just in case conversion is needed. nullptr
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* if unused.
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*/
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Filter *convert;
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public:
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AutoConvertFilter(Filter *_filter):filter(_filter) {}
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~AutoConvertFilter() {
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delete filter;
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}
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virtual AudioFormat Open(AudioFormat &af, GError **error_r);
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virtual void Close();
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virtual const void *FilterPCM(const void *src, size_t src_size,
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size_t *dest_size_r, GError **error_r);
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};
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AudioFormat
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AutoConvertFilter::Open(AudioFormat &in_audio_format, GError **error_r)
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{
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assert(in_audio_format.IsValid());
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/* open the "real" filter */
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const AudioFormat child_audio_format = in_audio_format;
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AudioFormat out_audio_format = filter->Open(in_audio_format, error_r);
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if (!out_audio_format.IsDefined())
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return out_audio_format;
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/* need to convert? */
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if (in_audio_format != child_audio_format) {
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/* yes - create a convert_filter */
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const config_param empty;
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convert = filter_new(&convert_filter_plugin, empty, error_r);
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if (convert == nullptr) {
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filter->Close();
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return AudioFormat::Undefined();
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}
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AudioFormat audio_format2 = in_audio_format;
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AudioFormat audio_format3 =
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convert->Open(audio_format2, error_r);
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if (!audio_format3.IsDefined()) {
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delete convert;
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filter->Close();
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return AudioFormat::Undefined();
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}
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assert(audio_format2 == in_audio_format);
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convert_filter_set(convert, child_audio_format);
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} else
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/* no */
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convert = nullptr;
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return out_audio_format;
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}
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void
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AutoConvertFilter::Close()
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{
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if (convert != nullptr) {
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convert->Close();
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delete convert;
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}
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filter->Close();
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}
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const void *
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AutoConvertFilter::FilterPCM(const void *src, size_t src_size,
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size_t *dest_size_r, GError **error_r)
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{
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if (convert != nullptr) {
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src = convert->FilterPCM(src, src_size, &src_size, error_r);
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if (src == nullptr)
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return nullptr;
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}
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return filter->FilterPCM(src, src_size, dest_size_r, error_r);
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}
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Filter *
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autoconvert_filter_new(Filter *filter)
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{
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return new AutoConvertFilter(filter);
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}
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