video-pc/AvRecorder/recorder/audio_recorder.h

#ifndef __AUDIO_RECORDER_H__
#define __AUDIO_RECORDER_H__

#include "capturer/audio/audio_capturer.h"
#include "encoder/audio_mixer.h"
#include "muxer/av_muxer.h"
#include "basic/timer.h"

class AudioRecorder
{
public:
    AudioRecorder();
    ~AudioRecorder();

    struct Info
    {
        AudioMixer* mixer = nullptr;
        AvMuxer* muxer = nullptr;
        bool* isRecord = nullptr;
        int mixIndex;
        int* streamIndex = nullptr;
    };

    bool Open(const std::vector<AudioCapturer::Type>& deviceTypes,
              Encoder<MediaType::AUDIO>::Param& param,
              const uint32_t sampleRate = AUDIO_SAMPLE_RATE,
              const uint32_t channels = AUDIO_CHANNEL,
              const uint32_t bitsPerSample = 32,
              const AVSampleFormat format = AUDIO_FMT);
    bool LoadMuxer(AvMuxer& muxer);
    bool StartRecord();
    void StopRecord();
    void Close();
    void PullAndProcessAudio(); // 新增：主动拉取音频数据
    auto GetCaptureInfo(int mixIndex) { return _mixer.GetInputInfo(mixIndex); }
    void SetVolumeScale(float scale, int mixIndex);

private:
    std::vector<IAudioCapturer*> m_audioCapturers;
    AudioMixer _mixer;
    std::vector<Info> _infos;
    bool _isRecord = false;
    int _streamIndex;
    Encoder<MediaType::AUDIO>::Param _param;

    Timer m_audioTimer; // 新增高精度定时器
    static constexpr int AUDIO_PULL_INTERVAL_MS = 10;
    AVSampleFormat _GetAVSampleFormat(int wBitsPerSample, bool isFloat = true)
    {
        // isFloat=true 表示32/64位时优先返回浮点格式，否则返回整型
        switch (wBitsPerSample) {
            case 8:
                return AV_SAMPLE_FMT_U8;
            case 16:
                return AV_SAMPLE_FMT_S16;
            case 24:
                // FFmpeg没有24bit整型，通常用32bit整型或float
                return isFloat ? AV_SAMPLE_FMT_FLT : AV_SAMPLE_FMT_S32;
            case 32:
                return isFloat ? AV_SAMPLE_FMT_FLT : AV_SAMPLE_FMT_S32;
            case 64:
                return isFloat ? AV_SAMPLE_FMT_DBL : AV_SAMPLE_FMT_S64;
            default:
                // 默认返回float
                return AV_SAMPLE_FMT_FLT;
        }
    }
};

#endif