mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-26 20:47:08 +08:00
354 lines
11 KiB
C++
354 lines
11 KiB
C++
/*
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* Copyright (c) 2020 The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
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*
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* Use of this source code is governed by MIT license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#include "HlsPlayer.h"
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namespace mediakit {
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HlsPlayer::HlsPlayer(const EventPoller::Ptr &poller){
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_segment.setOnSegment([this](const char *data, uint64_t len) { onPacket(data, len); });
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setPoller(poller ? poller : EventPollerPool::Instance().getPoller());
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}
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HlsPlayer::~HlsPlayer() {}
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void HlsPlayer::play(const string &strUrl) {
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_m3u8_list.emplace_back(strUrl);
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play_l();
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}
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void HlsPlayer::play_l(){
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if (_m3u8_list.empty()) {
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teardown_l(SockException(Err_shutdown, "所有hls url都尝试播放失败!"));
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return;
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}
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float playTimeOutSec = (*this)[Client::kTimeoutMS].as<int>() / 1000.0;
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setMethod("GET");
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if(!(*this)[kNetAdapter].empty()) {
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setNetAdapter((*this)[kNetAdapter]);
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}
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sendRequest(_m3u8_list.back(), playTimeOutSec);
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}
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void HlsPlayer::teardown_l(const SockException &ex){
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_timer.reset();
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_timer_ts.reset();
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_http_ts_player.reset();
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shutdown(ex);
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}
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void HlsPlayer::teardown() {
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teardown_l(SockException(Err_shutdown,"teardown"));
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}
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void HlsPlayer::playNextTs(bool force){
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if (_ts_list.empty()) {
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//播放列表为空，那么立即重新下载m3u8文件
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_timer.reset();
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play_l();
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return;
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}
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if (!force && _http_ts_player && _http_ts_player->alive()) {
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//播放器目前还存活，正在下载中
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return;
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}
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auto ts_duration = _ts_list.front().duration * 1000;
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weak_ptr<HlsPlayer> weakSelf = dynamic_pointer_cast<HlsPlayer>(shared_from_this());
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std::shared_ptr<Ticker> ticker(new Ticker);
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_http_ts_player = std::make_shared<HttpTSPlayer>(getPoller(), false);
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_http_ts_player->setOnCreateSocket([weakSelf](const EventPoller::Ptr &poller) {
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auto strongSelf = weakSelf.lock();
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if (strongSelf) {
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return strongSelf->createSocket();
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}
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return Socket::createSocket(poller, true);
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});
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_http_ts_player->setOnDisconnect([weakSelf, ticker, ts_duration](const SockException &err) {
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auto strongSelf = weakSelf.lock();
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if (!strongSelf) {
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return;
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}
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auto delay = ts_duration - 500 - ticker->elapsedTime();
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if (delay <= 0) {
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//播放这个ts切片花费了太长时间，我们立即下一个切片的播放
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strongSelf->playNextTs(true);
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} else {
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//下一个切片慢点播放
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strongSelf->_timer_ts.reset(new Timer(delay / 1000.0, [weakSelf, delay]() {
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auto strongSelf = weakSelf.lock();
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if (!strongSelf) {
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return false;
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}
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strongSelf->playNextTs(true);
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return false;
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}, strongSelf->getPoller()));
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}
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});
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_http_ts_player->setOnPacket([weakSelf](const char *data, uint64_t len) {
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auto strongSelf = weakSelf.lock();
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if (!strongSelf) {
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return;
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}
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//收到ts包
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strongSelf->onPacket_l(data, len);
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});
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_http_ts_player->setMethod("GET");
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if (!(*this)[kNetAdapter].empty()) {
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_http_ts_player->setNetAdapter((*this)[Client::kNetAdapter]);
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}
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_http_ts_player->sendRequest(_ts_list.front().url, 2 * _ts_list.front().duration);
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_ts_list.pop_front();
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}
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void HlsPlayer::onParsed(bool is_m3u8_inner,int64_t sequence,const map<int,ts_segment> &ts_map){
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if (!is_m3u8_inner) {
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//这是ts播放列表
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if (_last_sequence == sequence) {
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return;
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}
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_last_sequence = sequence;
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for (auto &pr : ts_map) {
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auto &ts = pr.second;
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if (_ts_url_cache.emplace(ts.url).second) {
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//该ts未重复
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_ts_list.emplace_back(ts);
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//按时间排序
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_ts_url_sort.emplace_back(ts.url);
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}
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}
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if (_ts_url_sort.size() > 2 * ts_map.size()) {
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//去除防重列表中过多的数据
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_ts_url_cache.erase(_ts_url_sort.front());
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_ts_url_sort.pop_front();
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}
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playNextTs();
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} else {
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//这是m3u8列表,我们播放最高清的子hls
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if (ts_map.empty()) {
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teardown_l(SockException(Err_shutdown, StrPrinter << "empty sub hls list:" + getUrl()));
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return;
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}
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_timer.reset();
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weak_ptr<HlsPlayer> weakSelf = dynamic_pointer_cast<HlsPlayer>(shared_from_this());
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auto url = ts_map.rbegin()->second.url;
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getPoller()->async([weakSelf, url]() {
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auto strongSelf = weakSelf.lock();
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if (strongSelf) {
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strongSelf->play(url);
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}
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}, false);
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}
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}
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int64_t HlsPlayer::onResponseHeader(const string &status, const HttpClient::HttpHeader &headers) {
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if (status != "200" && status != "206") {
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//失败
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teardown_l(SockException(Err_shutdown, StrPrinter << "bad http status code:" + status));
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return 0;
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}
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auto contet_type = const_cast< HttpClient::HttpHeader &>(headers)["Content-Type"];
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_is_m3u8 = (contet_type.find("application/vnd.apple.mpegurl") == 0);
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return -1;
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}
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void HlsPlayer::onResponseBody(const char *buf, int64_t size, int64_t recvedSize, int64_t totalSize) {
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if (recvedSize == size) {
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//刚开始
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_m3u8.clear();
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}
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_m3u8.append(buf, size);
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}
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void HlsPlayer::onResponseCompleted() {
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if (HlsParser::parse(getUrl(), _m3u8)) {
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playDelay();
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if (_first) {
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_first = false;
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onPlayResult(SockException(Err_success, "play success"));
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}
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} else {
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teardown_l(SockException(Err_shutdown, "解析m3u8文件失败"));
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}
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}
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float HlsPlayer::delaySecond(){
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if (HlsParser::isM3u8() && HlsParser::getTargetDur() > 0) {
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return HlsParser::getTargetDur();
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}
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return 1;
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}
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void HlsPlayer::onDisconnect(const SockException &ex) {
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if (_first) {
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//第一次失败，则播放失败
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_first = false;
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onPlayResult(ex);
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return;
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}
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//主动shutdown
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if (ex.getErrCode() == Err_shutdown) {
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if (_m3u8_list.size() <= 1) {
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//全部url都播放失败
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onShutdown(ex);
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} else {
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_m3u8_list.pop_back();
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//还有上一级url可以重试播放
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play_l();
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}
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return;
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}
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//eof等，之后播放失败，那么重试播放m3u8
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playDelay();
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}
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bool HlsPlayer::onRedirectUrl(const string &url,bool temporary) {
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_m3u8_list.emplace_back(url);
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return true;
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}
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void HlsPlayer::playDelay(){
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weak_ptr<HlsPlayer> weakSelf = dynamic_pointer_cast<HlsPlayer>(shared_from_this());
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_timer.reset(new Timer(delaySecond(), [weakSelf]() {
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auto strongSelf = weakSelf.lock();
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if (strongSelf) {
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strongSelf->play_l();
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}
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return false;
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}, getPoller()));
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}
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void HlsPlayer::onPacket_l(const char *data, uint64_t len){
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_segment.input(data,len);
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}
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//////////////////////////////////////////////////////////////////////////
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HlsPlayerImp::HlsPlayerImp(const EventPoller::Ptr &poller) : PlayerImp<HlsPlayer, PlayerBase>(poller) {
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}
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void HlsPlayerImp::setOnPacket(const TSSegment::onSegment &cb){
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_on_ts = cb;
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}
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void HlsPlayerImp::onPacket(const char *data,uint64_t len) {
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if (_on_ts) {
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_on_ts(data, len);
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}
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if (!_decoder) {
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_decoder = DecoderImp::createDecoder(DecoderImp::decoder_ts, this);
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}
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if (_decoder) {
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_decoder->input((uint8_t *) data, len);
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}
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}
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void HlsPlayerImp::onAllTrackReady() {
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PlayerImp<HlsPlayer, PlayerBase>::onPlayResult(SockException(Err_success,"play hls success"));
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}
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void HlsPlayerImp::onPlayResult(const SockException &ex) {
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if (ex) {
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PlayerImp<HlsPlayer, PlayerBase>::onPlayResult(ex);
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} else {
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_frame_cache.clear();
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_stamp[TrackAudio].setRelativeStamp(0);
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_stamp[TrackVideo].setRelativeStamp(0);
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_stamp[TrackAudio].syncTo(_stamp[TrackVideo]);
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setPlayPosition(0);
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weak_ptr<HlsPlayerImp> weakSelf = dynamic_pointer_cast<HlsPlayerImp>(shared_from_this());
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//每50毫秒执行一次
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_timer = std::make_shared<Timer>(0.05, [weakSelf]() {
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auto strongSelf = weakSelf.lock();
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if (!strongSelf) {
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return false;
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}
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strongSelf->onTick();
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return true;
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}, getPoller());
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}
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}
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void HlsPlayerImp::onShutdown(const SockException &ex) {
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PlayerImp<HlsPlayer, PlayerBase>::onShutdown(ex);
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_timer = nullptr;
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}
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vector<Track::Ptr> HlsPlayerImp::getTracks(bool trackReady) const {
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return MediaSink::getTracks(trackReady);
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}
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void HlsPlayerImp::inputFrame(const Frame::Ptr &frame) {
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//计算相对时间戳
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int64_t dts, pts;
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_stamp[frame->getTrackType()].revise(frame->dts(), frame->pts(), dts, pts);
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//根据时间戳缓存frame
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_frame_cache.emplace(dts, Frame::getCacheAbleFrame(frame));
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if (getBufferMS() > 30 * 1000) {
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//缓存超过30秒，强制消费至15秒(减少延时或内存占用)
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while (getBufferMS() > 15 * 1000) {
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MediaSink::inputFrame(_frame_cache.begin()->second);
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_frame_cache.erase(_frame_cache.begin());
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}
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//接着播放缓存中最早的帧
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setPlayPosition(_frame_cache.begin()->first);
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}
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}
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int64_t HlsPlayerImp::getPlayPosition(){
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return _ticker.elapsedTime() + _ticker_offset;
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}
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int64_t HlsPlayerImp::getBufferMS(){
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if(_frame_cache.empty()){
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return 0;
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}
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return _frame_cache.rbegin()->first - _frame_cache.begin()->first;
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}
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void HlsPlayerImp::setPlayPosition(int64_t pos){
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_ticker.resetTime();
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_ticker_offset = pos;
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}
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void HlsPlayerImp::onTick() {
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auto it = _frame_cache.begin();
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while (it != _frame_cache.end()) {
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if (it->first > getPlayPosition()) {
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//这些帧还未到时间播放
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break;
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}
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if (getBufferMS() < 3 * 1000) {
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//缓存小于3秒,那么降低定时器消费速度(让剩余的数据在3秒后消费完毕)
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//目的是为了防止定时器长时间干等后，数据瞬间消费完毕
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setPlayPosition(_frame_cache.begin()->first);
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}
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//消费掉已经到期的帧
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MediaSink::inputFrame(it->second);
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it = _frame_cache.erase(it);
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}
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}
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}//namespace mediakit
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