FaceAccess/Record/Player.cpp

#include "IoContext.h"
#include "main.h"
#include <boost/asio/post.hpp>
#include <filesystem>

void PlayerTask::setPath(const std::string &path) {
    if (m_path != path) {
        m_path = path;
    }
    if (std::filesystem::exists(path)) {
        m_ifs = std::make_shared<std::ifstream>(path, std::ifstream::binary);
    }
}

void PlayerTask::setChannels(int channels) {
    if (m_channels != channels) {
        m_channels = channels;
    }
}

/*
ffmpeg将一个1通道mp3文件，转换为 2通道,16bit,16000采样率的pcm文件,但是左通道数据为静音
ffmpeg -i 20200316_1900.mp3 -ac 2 -ar 16000 -filter_complex "[0:a]pan=stereo|c0=0*c0|c1=1*c0[a]" -map "[a]" -f s16le -acodec pcm_s16le
20200316_1900.pcm

ffmpeg将一个1通道mp3文件，转换为 2通道,16bit,16000采样率的pcm文件,但是右通道数据为静音
ffmpeg -i 20200316_1900.mp3 -ac 2 -ar 16000 -filter_complex "[0:a]pan=stereo|c0=1*c0|c1=0*c0[a]" -map "[a]" -f s16le -acodec pcm_s16le
20200316_1900.pcm


ffmpeg -i 20200316_1900.mp3 -ac 2 -ar 16000 -f s16le -acodec pcm_s16le 20200316_1900_2ch.pcm
ffmpeg -i 20200316_1900.mp3 -ac 1 -ar 16000 -f s16le -acodec pcm_s16le 20200316_1900_1ch.pcm


20200316_1900.mp3
./Record --play --channels=1 --path=/sdcard/data/20200316_1900_1ch.pcm
./Record --play --path=/sdcard/data/20200316_1900_2ch.pcm
./Record --play --path=/sdcard/data/20200316_1900_left_silence.pcm
./Record --play --path=/sdcard/data/20200316_1900_right_silense.pcm
20240904160913.pcm
*/

// ./Record --play --path=/sdcard/data/20240904160913.pcm
void PlayerTask::run() {
    using namespace Amass;

    RkAudio::Format format;
    format.channels = m_channels;
    format.period = 64;
    m_output = std::make_shared<RkAudio::Output>();
    if (!m_output->open(sizeof(uint16_t), format.sampleRate, format.channels, format.period, false)) {
        LOG(error) << "audio output open failed.";
        return;
    }
    m_buffer.resize(m_channels*sizeof(int16_t)*16*  format.period);
    play();
}

void PlayerTask::play() {
    using namespace Amass;
    auto ioConext = Singleton<IoContext>::instance();
    if (!m_ifs || !(*m_ifs)) {
        LOG(info) << "play finished";
        return;
    }
    m_ifs->read(m_buffer.data(), m_buffer.size());
    auto readedSize = m_ifs->gcount();
    m_output->write(reinterpret_cast<const uint8_t *>(m_buffer.data()), readedSize);

    boost::asio::post(*ioConext->ioContext(), [this]() { play(); });
}