154 lines
4.6 KiB
C++
154 lines
4.6 KiB
C++
/************************************************************
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*Copyright (C), 2017-2027,lcb0281@gmail.com
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*FileName: videoplayer.h
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*Date: 2019-06-15
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*Author: Caibiao Lee
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*Version: V1.0
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*Description: 音视频读取解码显示播放模块
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*Others: 该模块代码由网上拷贝，我只是添加了
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注释，规范了一些编码规范
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*History:
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***********************************************************/
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#ifndef VIDEOPLAYER_H
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#define VIDEOPLAYER_H
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#include <QThread>
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#include <QImage>
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extern "C"
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{
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#include "libavcodec/avcodec.h"
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#include "libavformat/avformat.h"
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#include <libavutil/time.h>
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#include "libavutil/pixfmt.h"
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#include "libswscale/swscale.h"
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#include "libswresample/swresample.h"
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#include <SDL.h>
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#include <SDL_audio.h>
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#include <SDL_types.h>
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#include <SDL_name.h>
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#include <SDL_main.h>
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#include <SDL_config.h>
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}
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#define VIDEO_PICTURE_QUEUE_SIZE 1
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#define MAX_AUDIO_SIZE (25 * 16 * 1024)
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#define MAX_VIDEO_SIZE (25 * 256 * 1024)
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#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 /**1 second of 48khz 32bit audio**/
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class VideoPlayer; /**前置声明**/
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typedef struct PacketQueue
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{
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AVPacketList *first_pkt; /**队列头指针**/
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AVPacketList *last_pkt; /**队列尾指针**/
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int nb_packets; /**队列长度**/
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int size; /**该节点数据大小**/
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SDL_mutex *mutex; /**互斥量**/
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SDL_cond *cond; /**状态变量**/
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} PacketQueue;
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typedef struct VideoState
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{
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DECLARE_ALIGNED(16,uint8_t,audio_buf2) [AVCODEC_MAX_AUDIO_FRAME_SIZE * 4];//字节对齐，提升效率
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AVFormatContext *pFormatContext; /**文件格式上下文**/
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PacketQueue audioq;//音频队列
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AVFrame *audio_frame;/**解码音频过程中的使用缓存**/
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AVStream *audio_st; /**音频流**/
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AVStream *video_st;//视频流
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AVPacket audio_pkt;
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PacketQueue videoq;//视频队列
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struct SwrContext *swr_ctx; /**用于解码后的音频格式转换**/
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uint8_t *audio_buf;
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uint8_t *audio_pkt_data;
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int audio_pkt_size;
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int s32VStreamCount; /**视频流数量**/
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int s32AStreamCount; /**音频流数量**/
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int audio_src_channels;
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int audio_tgt_channels;
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int audio_src_freq;
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int audio_tgt_freq;
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int audio_hw_buf_size;
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unsigned int audio_buf_size;
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unsigned int audio_buf_index;
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int64_t audio_src_channel_layout;
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int64_t audio_tgt_channel_layout;
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enum AVSampleFormat audio_src_fmt;
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enum AVSampleFormat audio_tgt_fmt;
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double audio_clock; /**音频时钟**/
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double video_clock; /**<pts of last decoded frame / predicted pts of next decoded frame**/
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/**跳转相关的变量**/
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int seek_req; /**跳转标志**/
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int64_t seek_pos; /**跳转的位置 -- 微秒**/
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int seek_flag_audio;/**跳转标志 -- 用于音频线程中**/
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int seek_flag_video;/**跳转标志 -- 用于视频线程中**/
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double seek_time; /**跳转的时间(秒) 值和seek_pos是一样的**/
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/**播放控制相关**/
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bool isPause; /**暂停标志**/
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bool quit; /**停止**/
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bool readFinished; /**文件读取完毕**/
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bool readThreadFinished;
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bool videoThreadFinished;
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SDL_Thread *video_tid; /**视频线程id**/
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SDL_AudioDeviceID audioID; /**SDL Audio Device IDs.**/
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VideoPlayer *player; /**记录下这个类的指针 主要用于在线程里面调用激发信号的函数**/
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}VideoState;
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class VideoPlayer : public QThread
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{
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Q_OBJECT
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public:
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enum PlayerState
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{
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Playing,
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Pause,
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Stop
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};
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explicit VideoPlayer();
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~VideoPlayer();
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bool setFileName(QString path);
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bool play();
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bool pause();
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bool stop(bool isWait = false); //参数表示是否等待所有的线程执行完毕再返回
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void seek(int64_t pos); //单位是微秒
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int64_t getTotalTime(); //单位微秒
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double getCurrentTime(); //单位秒
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void disPlayVideo(QImage img);
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void disPlayVideo(uchar *ptr,uint width,uint height);
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int SaveYuv(unsigned char *buf, int wrap, int xsize, int ysize, char *filename);
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signals:
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void sig_GetOneFrame(QImage); //获取到一帧图像 就发送此信号
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void sigYuv_liuyi(uchar *ptr,uint width,uint height); //获取到一帧图像 就发送此信号
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void sig_StateChanged(VideoPlayer::PlayerState state);
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void sig_TotalTimeChanged(qint64 uSec); //获取到视频时长的时候激发此信号
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protected:
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void run();
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private:
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QString mFileName;
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VideoState mVideoState;
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PlayerState mPlayerState; //播放状态
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};
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#endif // VIDEOPLAYER_H
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