pcm_encoder.h

Go to the documentation of this file.

/*
 * Copyright (c) 2015 Roc Streaming authors
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
 
//! @file roc_audio/pcm_encoder.h
//! @brief PCM encoder.
 
#ifndef ROC_AUDIO_PCM_ENCODER_H_
#define ROC_AUDIO_PCM_ENCODER_H_
 
#include "roc_audio/iframe_encoder.h"
#include "roc_audio/pcm_mapper.h"
#include "roc_audio/sample_spec.h"
#include "roc_core/noncopyable.h"
 
namespace roc {
namespace audio {
 
//! PCM encoder.
class PcmEncoder : public IFrameEncoder, public core::NonCopyable<> {
public:
    //! Construction function.
    static IFrameEncoder* construct(core::IArena& arena,
                                    const PcmFormat& pcm_format,
                                    const SampleSpec& sample_spec);
 
    //! Initialize.
    PcmEncoder(const PcmFormat& pcm_format, const SampleSpec& sample_spec);
 
    //! Get encoded frame size in bytes for given number of samples per channel.
    virtual size_t encoded_byte_count(size_t num_samples) const;
 
    //! Start encoding a new frame.
    virtual void begin(void* frame, size_t frame_size);
 
    //! Encode samples.
    virtual size_t write(const sample_t* samples, size_t n_samples);
 
    //! Finish encoding frame.
    virtual void end();
 
private:
    PcmMapper pcm_mapper_;
    const size_t n_chans_;
 
    void* frame_data_;
    size_t frame_byte_size_;
    size_t frame_bit_off_;
};
 
} // namespace audio
} // namespace roc
 
#endif // ROC_AUDIO_PCM_ENCODER_H_