88 lines
2.2 KiB
C++
88 lines
2.2 KiB
C++
/*
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* Chromaprint -- Audio fingerprinting toolkit
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* Copyright (C) 2010 Lukas Lalinsky <lalinsky@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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* USA
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*/
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#ifndef CHROMAPRINT_AUDIO_PROCESSOR_H_
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#define CHROMAPRINT_AUDIO_PROCESSOR_H_
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#include "utils.h"
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#include "audio_consumer.h"
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struct AVResampleContext;
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namespace Chromaprint
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{
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class AudioProcessor : public AudioConsumer
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{
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public:
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AudioProcessor(int sample_rate, AudioConsumer *consumer);
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virtual ~AudioProcessor();
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int target_sample_rate() const
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{
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return m_target_sample_rate;
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}
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void set_target_sample_rate(int sample_rate)
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{
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m_target_sample_rate = sample_rate;
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}
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AudioConsumer *consumer() const
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{
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return m_consumer;
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}
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void set_consumer(AudioConsumer *consumer)
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{
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m_consumer = consumer;
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}
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//! Prepare for a new audio stream
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bool Reset(int sample_rate, int num_channels);
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//! Process a chunk of data from the audio stream
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void Consume(short *input, int length);
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//! Process any buffered input that was not processed before and clear buffers
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void Flush();
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private:
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CHROMAPRINT_DISABLE_COPY(AudioProcessor);
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int Load(short *input, int length);
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void LoadMono(short *input, int length);
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void LoadStereo(short *input, int length);
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void LoadMultiChannel(short *input, int length);
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void Resample();
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short *m_buffer;
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short *m_resample_buffer;
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int m_buffer_offset;
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int m_buffer_size;
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int m_target_sample_rate;
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int m_num_channels;
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AudioConsumer *m_consumer;
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struct AVResampleContext *m_resample_ctx;
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};
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};
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#endif
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