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MP4: mp4开始点播确保MediaSource注册后再返回

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This commit is contained in:
xiongziliang 2021-12-17 22:33:08 +08:00
parent 0b2e55429d
commit 0feac7c924
2 changed files with 77 additions and 50 deletions
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95
src/Record/MP4Reader.cpp
View File

@ -9,14 +9,16 @@
*/
#ifdef ENABLE_MP4
#include "MP4Reader.h"
#include "Common/config.h"
#include "Thread/WorkThreadPool.h"
using namespace toolkit;
namespace mediakit {
MP4Reader::MP4Reader(const string &vhost, const string &app, const string &stream_id, const string &file_path) {
_poller = WorkThreadPool::Instance().getPoller();
_file_path = file_path;
if (_file_path.empty()) {
GET_CONFIG(string, recordPath, Record::kFilePath);
@ -37,12 +39,12 @@ MP4Reader::MP4Reader(const string &vhost, const string &app, const string &strea
}
_muxer = std::make_shared<MultiMediaSourceMuxer>(vhost, app, stream_id, _demuxer->getDurationMS() / 1000.0f, true, true, false, false);
auto tracks = _demuxer->getTracks(false);
if(tracks.empty()){
if (tracks.empty()) {
throw std::runtime_error(StrPrinter << "该mp4文件没有有效的track:" << _file_path);
}
for(auto &track : tracks){
for (auto &track : tracks) {
_muxer->addTrack(track);
if(track->getTrackType() == TrackVideo){
if (track->getTrackType() == TrackVideo) {
_have_video = true;
}
}
@ -70,8 +72,8 @@ bool MP4Reader::readSample() {
}
}
GET_CONFIG(bool, fileRepeat, Record::kFileRepeat);
if (eof && (fileRepeat || _file_repeat)) {
GET_CONFIG(bool, file_repeat, Record::kFileRepeat);
if (eof && (file_repeat || _file_repeat)) {
//需要从头开始看
seekTo(0);
return true;
@ -80,37 +82,53 @@ bool MP4Reader::readSample() {
return !eof;
}
bool MP4Reader::readNextSample() {
bool keyFrame = false;
bool eof = false;
auto frame = _demuxer->readFrame(keyFrame, eof);
if (!frame) {
return false;
}
if (_muxer) {
_muxer->inputFrame(frame);
}
setCurrentStamp(frame->dts());
return true;
}
void MP4Reader::stopReadMP4() {
_timer = nullptr;
}
void MP4Reader::startReadMP4(const EventPoller::Ptr &poller, uint64_t sample_ms, bool ref_self, bool file_repeat) {
void MP4Reader::startReadMP4(const EventPoller::Ptr &poller_in, uint64_t sample_ms, bool ref_self, bool file_repeat) {
GET_CONFIG(uint32_t, sampleMS, Record::kSampleMS);
auto strongSelf = shared_from_this();
if (_muxer) { _muxer->setMediaListener(strongSelf); }
auto strong_self = shared_from_this();
if (_muxer) {
_muxer->setMediaListener(strong_self);
//一直读到所有track就绪为止
while (!_muxer->isAllTrackReady() && readNextSample()) {}
}
//先获取关键帧
seekTo(0);
//读sampleMS毫秒的数据用于产生MediaSource
setCurrentStamp(getCurrentStamp() + sampleMS);
readSample();
//未指定线程，那么使用后台线程(读写文件采用后台线程)
auto poller = poller_in ? poller_in : WorkThreadPool::Instance().getPoller();
auto timer_sec = (sample_ms ? sample_ms : sampleMS) / 1000.0f;
//启动定时器
if (ref_self) {
_timer = std::make_shared<Timer>((sample_ms ? sample_ms : sampleMS) / 1000.0f, [strongSelf]() {
lock_guard<recursive_mutex> lck(strongSelf->_mtx);
return strongSelf->readSample();
}, poller ? poller : _poller);
_timer = std::make_shared<Timer>(timer_sec, [strong_self]() {
lock_guard<recursive_mutex> lck(strong_self->_mtx);
return strong_self->readSample();
}, poller);
} else {
weak_ptr<MP4Reader> weak_self = strongSelf;
_timer = std::make_shared<Timer>((sample_ms ? sample_ms : sampleMS) / 1000.0f, [weak_self]() {
auto strongSelf = weak_self.lock();
if (!strongSelf) {
weak_ptr<MP4Reader> weak_self = strong_self;
_timer = std::make_shared<Timer>(timer_sec, [weak_self]() {
auto strong_self = weak_self.lock();
if (!strong_self) {
return false;
}
lock_guard<recursive_mutex> lck(strongSelf->_mtx);
return strongSelf->readSample();
}, poller ? poller : _poller);
lock_guard<recursive_mutex> lck(strong_self->_mtx);
return strong_self->readSample();
}, poller);
}
_file_repeat = file_repeat;
@ -121,10 +139,10 @@ const MP4Demuxer::Ptr &MP4Reader::getDemuxer() const {
}
uint32_t MP4Reader::getCurrentStamp() {
return (uint32_t)(_seek_to + !_paused * _speed * _seek_ticker.elapsedTime());
return (uint32_t) (_seek_to + !_paused * _speed * _seek_ticker.elapsedTime());
}
void MP4Reader::setCurrentStamp(uint32_t new_stamp){
void MP4Reader::setCurrentStamp(uint32_t new_stamp) {
auto old_stamp = getCurrentStamp();
_seek_to = new_stamp;
_last_dts = new_stamp;
@ -168,22 +186,21 @@ bool MP4Reader::speed(MediaSource &sender, float speed) {
return true;
}
bool MP4Reader::seekTo(uint32_t ui32Stamp) {
bool MP4Reader::seekTo(uint32_t stamp_seek) {
lock_guard<recursive_mutex> lck(_mtx);
if (ui32Stamp > _demuxer->getDurationMS()) {
if (stamp_seek > _demuxer->getDurationMS()) {
//超过文件长度
return false;
}
auto stamp = _demuxer->seekTo(ui32Stamp);
if(stamp == -1){
auto stamp = _demuxer->seekTo(stamp_seek);
if (stamp == -1) {
//seek失败
return false;
}
if(!_have_video){
//没有视频，不需要搜索关键帧
//设置当前时间戳
setCurrentStamp((uint32_t)stamp);
if (!_have_video) {
//没有视频，不需要搜索关键帧；设置当前时间戳
setCurrentStamp((uint32_t) stamp);
return true;
}
//搜索到下一帧关键帧
@ -191,11 +208,11 @@ bool MP4Reader::seekTo(uint32_t ui32Stamp) {
bool eof = false;
while (!eof) {
auto frame = _demuxer->readFrame(keyFrame, eof);
if(!frame){
if (!frame) {
//文件读完了都未找到下一帧关键帧
continue;
}
if(keyFrame || frame->keyFrame() || frame->configFrame()){
if (keyFrame || frame->keyFrame() || frame->configFrame()) {
//定位到key帧
if (_muxer) {
_muxer->inputFrame(frame);
@ -208,8 +225,8 @@ bool MP4Reader::seekTo(uint32_t ui32Stamp) {
return false;
}
bool MP4Reader::close(MediaSource &sender,bool force){
if(!_muxer || (!force && _muxer->totalReaderCount())){
bool MP4Reader::close(MediaSource &sender, bool force) {
if (!_muxer || (!force && _muxer->totalReaderCount())) {
return false;
}
_timer.reset();

32
src/Record/MP4Reader.h
View File

@ -16,27 +16,37 @@
using namespace toolkit;
namespace mediakit {
class MP4Reader : public std::enable_shared_from_this<MP4Reader> ,public MediaSourceEvent{
class MP4Reader : public std::enable_shared_from_this<MP4Reader>, public MediaSourceEvent {
public:
typedef std::shared_ptr<MP4Reader> Ptr;
virtual ~MP4Reader() = default;
using Ptr = std::shared_ptr<MP4Reader>;
/**
* 流化一个mp4文件，使之转换成RtspMediaSource和RtmpMediaSource
* 点播一个mp4文件，使之转换成MediaSource流媒体
* @param vhost 虚拟主机
* @param app 应用名
* @param stream_id 流id
* @param stream_id 流id,置空时,只解复用mp4,但是不生成MediaSource
* @param file_path 文件路径，如果为空则根据配置文件和上面参数自动生成，否则使用指定的文件
*/
MP4Reader(const string &vhost, const string &app, const string &stream_id, const string &file_path = "");
~MP4Reader() override = default;
/**
* 开始流化MP4文件，需要指出的是，MP4Reader对象一经过调用startReadMP4方法，它的强引用会自持有，
* 意思是在文件流化结束之前或中断之前,MP4Reader对象是不会被销毁的(不管有没有被外部对象持有)
* 开始解复用MP4文件
* @param poller 解复用mp4定时器所绑定线程，置空则随机采用一条后台线程
* @param sample_ms 每次读取文件数据量，单位毫秒，置0时采用配置文件配置
* @param ref_self 是否让定时器引用此对象本身，如果无其他对象引用本身，在不循环读文件时，读取文件结束后本对象将自动销毁
* @param file_repeat 是否循环读取文件，如果配置文件设置为循环读文件，此参数无效
*/
void startReadMP4(const EventPoller::Ptr &poller = nullptr, uint64_t sample_ms = 0, bool ref_self = true, bool file_repeat = false);
/**
* 停止解复用MP4定时器
*/
void stopReadMP4();
/**
* 获取mp4解复用器
*/
const MP4Demuxer::Ptr& getDemuxer() const;
private:
@ -51,9 +61,10 @@ private:
string getOriginUrl(MediaSource &sender) const override;
bool readSample();
bool readNextSample();
uint32_t getCurrentStamp();
void setCurrentStamp(uint32_t ui32Stamp);
bool seekTo(uint32_t ui32Stamp);
void setCurrentStamp(uint32_t stamp);
bool seekTo(uint32_t stamp_seek);
private:
bool _file_repeat = false;
@ -61,12 +72,11 @@ private:
bool _paused = false;
float _speed = 1.0;
uint32_t _last_dts = 0;
uint32_t _seek_to;
uint32_t _seek_to = 0;
string _file_path;
recursive_mutex _mtx;
Ticker _seek_ticker;
Timer::Ptr _timer;
EventPoller::Ptr _poller;
MP4Demuxer::Ptr _demuxer;
MultiMediaSourceMuxer::Ptr _muxer;
};