71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
#include "IoContext.h"
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#include "main.h"
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#include <boost/asio/post.hpp>
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#include <filesystem>
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void PlayerTask::setPath(const std::string &path) {
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if (m_path != path) {
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m_path = path;
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}
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if (std::filesystem::exists(path)) {
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m_ifs = std::make_shared<std::ifstream>(path, std::ifstream::binary);
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}
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}
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void PlayerTask::setChannels(int channels) {
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if (m_channels != channels) {
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m_channels = channels;
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}
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}
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/*
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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
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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
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20200316_1900.pcm
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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
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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
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20200316_1900.pcm
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ffmpeg -i 20200316_1900.mp3 -ac 2 -ar 16000 -f s16le -acodec pcm_s16le 20200316_1900_2ch.pcm
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ffmpeg -i 20200316_1900.mp3 -ac 1 -ar 16000 -f s16le -acodec pcm_s16le 20200316_1900_1ch.pcm
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20200316_1900.mp3
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./Record --play --channels=1 --path=/sdcard/data/20200316_1900_1ch.pcm
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./Record --play --path=/sdcard/data/20200316_1900_2ch.pcm
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./Record --play --path=/sdcard/data/20200316_1900_left_silence.pcm
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./Record --play --path=/sdcard/data/20200316_1900_right_silense.pcm
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20240904160913.pcm
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*/
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// ./Record --play --path=/sdcard/data/20240904160913.pcm
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void PlayerTask::run() {
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using namespace Amass;
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RkAudio::Format format;
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format.channels = m_channels;
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format.period = 64;
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m_output = std::make_shared<RkAudio::Output>();
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if (!m_output->open(sizeof(uint16_t), format.sampleRate, format.channels, format.period, false)) {
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LOG(error) << "audio output open failed.";
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return;
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}
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m_buffer.resize(m_channels*sizeof(int16_t)*16* format.period);
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play();
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}
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void PlayerTask::play() {
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using namespace Amass;
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auto ioConext = Singleton<IoContext>::instance();
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if (!m_ifs || !(*m_ifs)) {
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LOG(info) << "play finished";
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return;
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}
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m_ifs->read(m_buffer.data(), m_buffer.size());
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auto readedSize = m_ifs->gcount();
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m_output->write(reinterpret_cast<const uint8_t *>(m_buffer.data()), readedSize);
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boost::asio::post(*ioConext->ioContext(), [this]() { play(); });
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} |