master/AOpusSoundPipe_8h_source.html

#pragma once


#include "AUI/Audio/ISoundPipe.h"

#include "AUI/IO/ADynamicPipe.h"


typedef struct OpusDecoder OpusDecoder;


class AOpusSoundPipe : public ISoundPipe {

public:

    static constexpr uint32_t SAMPLE_RATE = 48000;

    static constexpr AChannelFormat CHANNEL_COUNT = AChannelFormat::STEREO;

    static constexpr ASampleFormat SAMPLE_FORMAT = ASampleFormat::I16;


    ~AOpusSoundPipe() override;


    void write(const char *src, size_t size) override;


    size_t read(char* dst, size_t size) override;


    AAudioFormat info() override;


    [[nodiscard]]

    bool isLastWriteSuccessful() const {

        return mLastWriteSuccessful;

    }


private:

    static constexpr size_t HEADER_SIZE = 19;

    static constexpr size_t MAX_UNPACKED_SIZE = 11520;


    struct OpusHead {

        char signature[8];

        uint8_t version;

        uint8_t outputChannelCount;

        uint16_t preSkip; //TODO implement preskipping first samples

        uint32_t inputSampleRate;

        int16_t outputGain;

        int8_t channelMap;

        char _pad[1];

    };


    static_assert(sizeof(OpusHead) == 20);


    ADynamicPipe mDecodedSamples;

    bool mHeaderHasRead = false;

    bool mLastWriteSuccessful = true;


    OpusHead mHeader;

    OpusDecoder* mDecoder;

    char mSampleBuffer[MAX_UNPACKED_SIZE];

    size_t mPreSkipped = 0;

    AMutex mSync;

};


AOpusSoundPipe
Sound pipe for OPUS format, decodes OPUS packets.
Definition AOpusSoundPipe.h:12

AOpusSoundPipe::read
size_t read(char *dst, size_t size) override
Reads up to size bytes from stream. Blocking (waiting for new data) is allowed.

AOpusSoundPipe::write
void write(const char *src, size_t size) override
Writes exact size bytes to stream. Blocking (waiting for write all data) is allowed.

AOpusSoundPipe::info
AAudioFormat info() override
Get general info about sound stream.

ISoundPipe
ISoundPipe accepts sound data and outputs sound samples, useful for decoded audio passed in packets.
Definition ISoundPipe.h:10

ASampleFormat
ASampleFormat
Sample formats supported for mixing.
Definition ASampleFormat.h:12

ASampleFormat::I16
@ I16
Signed 16-bit integer.
Definition ASampleFormat.h:16

AAudioFormat
Audio format descriptor.
Definition AAudioFormat.h:13