746db74c
 Hu Chunming
实现recode
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#include "FFRecoderTaskManager.h"
#include <chrono>
struct RecodeThreadParam {
FFRecoderTaskManager* _this;
RecodeParam param;
};
static long get_cur_time() {
chrono::time_point<chrono::system_clock, chrono::milliseconds> tpMicro
= chrono::time_point_cast<chrono::milliseconds>(chrono::system_clock::now());
return tpMicro.time_since_epoch().count();
}
static string get_cur_datetime()
{
using namespace std;
auto t = chrono::system_clock::to_time_t(chrono::system_clock::now());
char buffer[40];
strftime(buffer, 80, "%Y_%m_%d_%H_%M_%S", std::localtime(&t));
buffer[20] = '\0';
return buffer;
}
static bool is_key_frame(AVPacket *pkt) {
return (pkt->flags & AV_PKT_FLAG_KEY) != 0;
}
FFRecoderTaskManager::FFRecoderTaskManager(){
}
FFRecoderTaskManager::~FFRecoderTaskManager(){
}
bool FFRecoderTaskManager::init(AVRational time_base, AVCodecContext* avctx){
m_time_base = time_base;
m_avctx = avctx;
m_recoder_thread = new std::thread(
[](void* arg) {
FFRecoderTaskManager* _this=(FFRecoderTaskManager*)arg;
if(_this != nullptr) {
_this->recode_thread2();
}else{
LOG_ERROR("recode 线程启动失败 !");
}
return (void*)0;
}, this);
return true;
}
void FFRecoderTaskManager::cache_pkt(AVPacket* pkt, long long frame_nb){
std::lock_guard<std::mutex> l_pkt(m_pkt_list_mtx);
// 考虑到一个AVPacket中的数据并不很大，为减少与解码模块的耦合度，方便管理，这里做一个clone
AVPacket *new_pkt = av_packet_clone(pkt);
DataPacket* newDataPkt = new DataPacket();
newDataPkt->pkt = new_pkt;
newDataPkt->frame_nb = frame_nb;
m_pkt_list.emplace_back(newDataPkt);
if(is_key_frame(pkt)){
// 越来越大的值
newDataPkt->isKeyFrame = true;
LOG_INFO("key frame_nb: {}", frame_nb);
} else {
newDataPkt->isKeyFrame = false;
}
std::lock_guard<std::mutex> l_info(m_recoderinfo_list_mtx);
if(m_recoderinfo_list.size() <= 0){
// 没有任务的时候，维持500的长度
while(m_pkt_list.size() > 1000) {
DataPacket* dataPkt = m_pkt_list.front();
delete dataPkt;
dataPkt = nullptr;
m_pkt_list.pop_front();
}
}
}
void FFRecoderTaskManager::save_intask_frame_nb(unsigned long long frame_nb) {
if(m_intask_frame_nb_list.size() <= 0) {
m_intask_frame_nb_list.push_back(frame_nb);
return;
}
for(auto it = m_intask_frame_nb_list.begin(); it != m_intask_frame_nb_list.end(); it++) {
if(*it > frame_nb) {
m_intask_frame_nb_list.insert(it, frame_nb);
return;
}
}
// 新 frame_nb 比所有的都大
m_intask_frame_nb_list.push_back(frame_nb);
}
void FFRecoderTaskManager::save_intask_recoderinfo(RecoderInfo info) {
std::lock_guard<std::mutex> l(m_recoderinfo_list_mtx);
if(m_recoderinfo_list.size() <= 0) {
m_recoderinfo_list.push_back(info);
return;
}
for(auto it = m_recoderinfo_list.begin(); it != m_recoderinfo_list.end(); it++) {
if(it->frame_nb > info.frame_nb) {
m_recoderinfo_list.insert(it, info);
return;
}
}
// 新 frame_nb 比所有的都大
m_recoderinfo_list.push_back(info);
}
list<DataPacket*>::iterator FFRecoderTaskManager::getStartIterator(unsigned long long frame_nb){
std::lock_guard<std::mutex> l(m_pkt_list_mtx);
auto it_first = m_pkt_list.begin();
long long start_frame_nb = (long long)(frame_nb - 375);
if(start_frame_nb <= 0) {
return it_first;
}
auto it_second = m_pkt_list.begin();
for(;it_second != m_pkt_list.end(); it_second++) {
DataPacket* dataPkt = *it_second;
if(dataPkt->isKeyFrame) {
it_first = it_second;
}
if(start_frame_nb >= (*it_first)->frame_nb && start_frame_nb <= (*it_second)->frame_nb) {
return it_first;
}
}
return m_pkt_list.begin();
}
// 多线程版
void FFRecoderTaskManager::create_recode_task(AVRational time_base, AVCodecContext* avctx, RecoderInfo& recoderInfo){
std::lock_guard<std::mutex> l(m_task_creat_mtx);
RecodeParam recodeParam;
recodeParam.time_base = time_base;
recodeParam.avctx = avctx;
recodeParam.recoderInfo = recoderInfo;
RecodeThreadParam* threadParam = new RecodeThreadParam();
threadParam->_this = this;
threadParam->param = recodeParam;
std::thread* recode_thread = new std::thread(
[](void* arg) {
RecodeThreadParam* threadParam = (RecodeThreadParam*)arg;
if(threadParam != nullptr){
FFRecoderTaskManager* _this=(FFRecoderTaskManager*)threadParam->_this;
if(_this != nullptr) {
_this->recode_thread(threadParam->param);
}else{
LOG_ERROR("recode 线程启动失败 !");
}
}
return (void*)0;
}, threadParam);
std::string id = recoderInfo.task_id + "_" + recoderInfo.object_id + "_" + std::to_string(recoderInfo.frame_nb);
m_id_recoderTask[id] = recode_thread;
save_intask_frame_nb(recoderInfo.frame_nb);
}
void FFRecoderTaskManager::create_recode_task2(RecoderInfo& recoderInfo) {
save_intask_recoderinfo(recoderInfo);
}
// 多线程版
void FFRecoderTaskManager::recode_thread(RecodeParam recodeParam){
{
// 此处确保create_recode_task执行完成，m_id_recoderTask 已经保存当前线程信息
std::lock_guard<std::mutex> l(m_task_creat_mtx);
}
RecoderInfo recoderInfo;
recoderInfo = recodeParam.recoderInfo;
std::string id = recoderInfo.task_id + "_" + recoderInfo.object_id + "_" + std::to_string(recoderInfo.frame_nb);
string file_name = recoderInfo.recoderDir + "/recoder_" + id + "_" + std::to_string(get_cur_time()) + ".mp4";
FFRecoder ffrecoder;
bool bInit = ffrecoder.init(recodeParam.time_base, recodeParam.avctx, file_name.c_str());
if (!bInit) {
LOG_ERROR("ffrecoder init error : {} {} {}", recoderInfo.task_id, recoderInfo.object_id, recoderInfo.frame_nb);
m_id_recoderTask.erase(id);
return;
}
LOG_INFO("record start, pkt_list size: {} id: {}", m_pkt_list.size(), id);
int count = 0;
for (auto it = m_pkt_list.begin(); it != m_pkt_list.end() && count < 500; ++it) {
DataPacket* dataPkt = *it;
AVPacket* pkt = dataPkt->pkt;
ffrecoder.write_pkt(pkt);
count++;
}
ffrecoder.flush();
ffrecoder.uninit();
m_id_recoderTask.erase(id);
LOG_INFO("record end : {}", file_name);
}
void FFRecoderTaskManager::recode_thread2() {
while(true) {
m_recoderinfo_list_mtx.lock();
if(m_recoderinfo_list.size() <= 0){
m_recoderinfo_list_mtx.unlock();
std::this_thread::sleep_for(std::chrono::milliseconds(3));
continue;
}
auto it_param = m_recoderinfo_list.begin();
RecoderInfo recoderinfo = *it_param;
m_recoderinfo_list.pop_front();
m_recoderinfo_list_mtx.unlock();
auto it_data = getStartIterator(recoderinfo.frame_nb);
if(it_data == m_pkt_list.end()) {
std::this_thread::sleep_for(std::chrono::milliseconds(3));
continue;
}
LOG_INFO("start frame_nb: {}", (*it_data)->frame_nb);
m_pkt_list_mtx.lock();
auto it = m_pkt_list.begin();
while (it != it_data) {
DataPacket* dataPkt = m_pkt_list.front();
delete dataPkt;
dataPkt = nullptr;
m_pkt_list.pop_front();
it = m_pkt_list.begin();
}
m_pkt_list_mtx.unlock();
std::string id = recoderinfo.task_id + "_" + recoderinfo.object_id + "_" + std::to_string(recoderinfo.frame_nb);
string file_name = recoderinfo.recoderDir + "/recoder_" + id + "_" + std::to_string(get_cur_time()) + ".mp4";
FFRecoder ffrecoder;
bool bInit = ffrecoder.init(m_time_base, m_avctx, file_name.c_str());
if (!bInit) {
LOG_ERROR("ffrecoder init error : {} {} {}", recoderinfo.task_id, recoderinfo.object_id, recoderinfo.frame_nb);
continue;
}
LOG_INFO("record start, pkt_list size: {} id: {}", m_pkt_list.size(), id);
int count = 0;
auto it_save = it_data;
unsigned long long start_frame_nb = (*it_data)->frame_nb;
unsigned long long end_frame_nb = (*it_data)->frame_nb;
for (; it_save != m_pkt_list.end() && count < 500; ++it_save) {
DataPacket* dataPkt = *it_save;
AVPacket* pkt = dataPkt->pkt;
ffrecoder.write_pkt(pkt);
count++;
end_frame_nb = (*it_save)->frame_nb;
}
// ffrecoder.flush();
ffrecoder.uninit();
LOG_INFO("record end, total save: {} start_frame_nb: {} end_frame_nb: {} file_path: {}", count, start_frame_nb, end_frame_nb, file_name);
}
}
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