media/codec2/components/mp3/C2SoftMp3Dec.h

/*
 * Copyright (C) 2018 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ANDROID_C2_SOFT_MP3_DEC_H_
#define ANDROID_C2_SOFT_MP3_DEC_H_

#include <SimpleC2Component.h>


struct tPVMP3DecoderExternal;

bool parseMp3Header(uint32_t header, size_t *frame_size,
                    uint32_t *out_sampling_rate = nullptr,
                    uint32_t *out_channels = nullptr,
                    uint32_t *out_bitrate = nullptr,
                    uint32_t *out_num_samples = nullptr);

namespace android {

struct C2SoftMP3 : public SimpleC2Component {
    class IntfImpl;

    C2SoftMP3(const char *name, c2_node_id_t id,
              const std::shared_ptr<IntfImpl> &intfImpl);
    virtual ~C2SoftMP3();

    // From SimpleC2Component
    c2_status_t onInit() override;
    c2_status_t onStop() override;
    void onReset() override;
    void onRelease() override;
    c2_status_t onFlush_sm() override;
    void process(
            const std::unique_ptr<C2Work> &work,
            const std::shared_ptr<C2BlockPool> &pool) override;
    c2_status_t drain(
            uint32_t drainMode,
            const std::shared_ptr<C2BlockPool> &pool) override;

private:
    enum {
        kPVMP3DecoderDelay = 529 // samples
    };

    std::shared_ptr<IntfImpl> mIntf;
    tPVMP3DecoderExternal *mConfig;
    void *mDecoderBuf;

    bool mIsFirst;
    bool mSignalledError;
    bool mSignalledOutputEos;
    bool mGaplessBytes;
    uint64_t mAnchorTimeStamp;
    uint64_t mProcessedSamples;

    status_t initDecoder();

    C2_DO_NOT_COPY(C2SoftMP3);
};

}  // namespace android

#endif  // ANDROID_C2_SOFT_MP3_DEC_H_