922 lines
33 KiB
C++
922 lines
33 KiB
C++
#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <semaphore.h>
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#include <iterator> //std::distance
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#include <mist/bitfields.h>
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#include <mist/stream.h>
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#include <mist/defines.h>
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#include <mist/http_parser.h>
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#include <mist/timing.h>
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#include "output.h"
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namespace Mist {
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JSON::Value Output::capa = JSON::Value();
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int getDTSCLen(char * mapped, long long int offset){
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return Bit::btohl(mapped + offset + 4);
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}
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unsigned long long getDTSCTime(char * mapped, long long int offset){
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return Bit::btohll(mapped + offset + 12);
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}
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void Output::init(Util::Config * cfg){
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capa["optional"]["debug"]["name"] = "debug";
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capa["optional"]["debug"]["help"] = "The debug level at which messages need to be printed.";
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capa["optional"]["debug"]["option"] = "--debug";
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capa["optional"]["debug"]["type"] = "debug";
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}
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Output::Output(Socket::Connection & conn) : myConn(conn) {
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firstTime = 0;
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crc = getpid();
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parseData = false;
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wantRequest = true;
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sought = false;
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isInitialized = false;
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isBlocking = false;
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completeKeysOnly = false;
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lastStats = 0;
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maxSkipAhead = 7500;
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minSkipAhead = 5000;
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realTime = 1000;
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if (myConn){
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setBlocking(true);
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}else{
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DEBUG_MSG(DLVL_WARN, "Warning: MistOut created with closed socket!");
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}
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sentHeader = false;
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}
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void Output::setBlocking(bool blocking){
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isBlocking = blocking;
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myConn.setBlocking(isBlocking);
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}
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void Output::updateMeta(){
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//read metadata from page to myMeta variable
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if (nProxy.metaPages[0].mapped){
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IPC::semaphore * liveSem = 0;
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if (!myMeta.vod){
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static char liveSemName[NAME_BUFFER_SIZE];
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snprintf(liveSemName, NAME_BUFFER_SIZE, SEM_LIVE, streamName.c_str());
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liveSem = new IPC::semaphore(liveSemName, O_RDWR, ACCESSPERMS, 1);
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if (*liveSem){
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liveSem->wait();
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}else{
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delete liveSem;
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liveSem = 0;
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}
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}
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DTSC::Packet tmpMeta(nProxy.metaPages[0].mapped, nProxy.metaPages[0].len, true);
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if (tmpMeta.getVersion()){
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myMeta.reinit(tmpMeta);
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}
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if (liveSem){
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liveSem->post();
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delete liveSem;
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liveSem = 0;
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}
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}
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}
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/// Called when stream initialization has failed.
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/// The standard implementation will set isInitialized to false and close the client connection,
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/// thus causing the process to exit cleanly.
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void Output::onFail(){
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isInitialized = false;
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wantRequest = true;
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parseData= false;
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streamName.clear();
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myConn.close();
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}
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void Output::initialize(){
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if (isInitialized){
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return;
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}
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if (nProxy.metaPages[0].mapped){
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return;
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}
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if (streamName.size() < 1){
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return; //abort - no stream to initialize...
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}
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isInitialized = true;
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reconnect();
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//if the connection failed, fail
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if (streamName.size() < 1){
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onFail();
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return;
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}
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sought = false;
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}
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std::string Output::getConnectedHost(){
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return myConn.getHost();
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}
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std::string Output::getConnectedBinHost(){
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return myConn.getBinHost();
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}
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bool Output::isReadyForPlay() {
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if (myMeta.tracks.size()){
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if (!selectedTracks.size()){
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selectDefaultTracks();
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}
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if (myMeta.tracks[getMainSelectedTrack()].keys.size() >= 2){
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return true;
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}else{
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HIGH_MSG("NOT READY YET (%lu tracks, %lu = %lu keys)", myMeta.tracks.size(), getMainSelectedTrack(), myMeta.tracks[getMainSelectedTrack()].keys.size());
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}
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}else{
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HIGH_MSG("NOT READY YET (%lu tracks)", myMeta.tracks.size());
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}
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return false;
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}
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/// Connects or reconnects to the stream.
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/// Assumes streamName class member has been set already.
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/// Will start input if not currently active, calls onFail() if this does not succeed.
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/// After assuring stream is online, clears nProxy.metaPages, then sets nProxy.metaPages[0], statsPage and nProxy.userClient to (hopefully) valid handles.
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/// Finally, calls updateMeta()
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void Output::reconnect(){
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thisPacket.null();
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if (!Util::startInput(streamName)){
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FAIL_MSG("Opening stream %s failed - aborting initialization", streamName.c_str());
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onFail();
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return;
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}
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if (statsPage.getData()){
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statsPage.finish();
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}
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statsPage = IPC::sharedClient(SHM_STATISTICS, STAT_EX_SIZE, true);
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if (nProxy.userClient.getData()){
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nProxy.userClient.finish();
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}
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char userPageName[NAME_BUFFER_SIZE];
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snprintf(userPageName, NAME_BUFFER_SIZE, SHM_USERS, streamName.c_str());
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nProxy.userClient = IPC::sharedClient(userPageName, PLAY_EX_SIZE, true);
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char pageId[NAME_BUFFER_SIZE];
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snprintf(pageId, NAME_BUFFER_SIZE, SHM_STREAM_INDEX, streamName.c_str());
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nProxy.metaPages.clear();
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nProxy.metaPages[0].init(pageId, DEFAULT_STRM_PAGE_SIZE);
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if (!nProxy.metaPages[0].mapped){
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FAIL_MSG("Could not connect to server for %s", streamName.c_str());
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onFail();
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return;
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}
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stats(true);
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updateMeta();
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selectDefaultTracks();
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if (!myMeta.vod && !isReadyForPlay()){
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unsigned long long waitUntil = Util::epoch() + 15;
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while (!myMeta.vod && !isReadyForPlay()){
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if (Util::epoch() > waitUntil + 45 || (!selectedTracks.size() && Util::epoch() > waitUntil)){
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INFO_MSG("Giving up waiting for playable tracks. Stream: %s, IP: %s", streamName.c_str(), getConnectedHost().c_str());
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break;
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}
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Util::wait(750);
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stats();
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updateMeta();
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}
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}
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}
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void Output::selectDefaultTracks(){
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if (!isInitialized){
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initialize();
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return;
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}
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//check which tracks don't actually exist
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std::set<unsigned long> toRemove;
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for (std::set<unsigned long>::iterator it = selectedTracks.begin(); it != selectedTracks.end(); it++){
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if (!myMeta.tracks.count(*it)){
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toRemove.insert(*it);
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}
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}
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//remove those from selectedtracks
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for (std::set<unsigned long>::iterator it = toRemove.begin(); it != toRemove.end(); it++){
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selectedTracks.erase(*it);
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}
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//loop through all codec combinations, count max simultaneous active
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unsigned int bestSoFar = 0;
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unsigned int bestSoFarCount = 0;
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unsigned int index = 0;
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jsonForEach(capa["codecs"], it) {
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unsigned int genCounter = 0;
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unsigned int selCounter = 0;
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if ((*it).size() > 0){
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jsonForEach((*it), itb) {
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if ((*itb).size() > 0){
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bool found = false;
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jsonForEach(*itb, itc) {
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for (std::set<unsigned long>::iterator itd = selectedTracks.begin(); itd != selectedTracks.end(); itd++){
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if (myMeta.tracks[*itd].codec == (*itc).asStringRef()){
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selCounter++;
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found = true;
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break;
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}
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}
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if (!found){
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for (std::map<unsigned int,DTSC::Track>::iterator trit = myMeta.tracks.begin(); trit != myMeta.tracks.end(); trit++){
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if (trit->second.codec == (*itc).asStringRef() || (*itc).asStringRef() == "*"){
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genCounter++;
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found = true;
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if ((*itc).asStringRef() != "*"){
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break;
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}
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}
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}
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}
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}
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}
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}
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if (selCounter == selectedTracks.size()){
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if (selCounter + genCounter > bestSoFarCount){
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bestSoFarCount = selCounter + genCounter;
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bestSoFar = index;
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HIGH_MSG("Match (%u/%u): %s", selCounter, selCounter+genCounter, (*it).toString().c_str());
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}
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}else{
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VERYHIGH_MSG("Not a match for currently selected tracks: %s", (*it).toString().c_str());
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}
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}
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index++;
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}
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MEDIUM_MSG("Trying to fill: %s", capa["codecs"][bestSoFar].toString().c_str());
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//try to fill as many codecs simultaneously as possible
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if (capa["codecs"][bestSoFar].size() > 0){
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jsonForEach(capa["codecs"][bestSoFar], itb) {
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if ((*itb).size() && myMeta.tracks.size()){
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bool found = false;
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jsonForEach((*itb), itc) {
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if (found) {
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break;
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}
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for (std::set<unsigned long>::iterator itd = selectedTracks.begin(); itd != selectedTracks.end(); itd++){
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if (myMeta.tracks[*itd].codec == (*itc).asStringRef()){
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found = true;
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break;
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}
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}
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if (!found){
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for (std::map<unsigned int,DTSC::Track>::iterator trit = myMeta.tracks.begin(); trit != myMeta.tracks.end(); trit++){
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if (trit->second.codec == (*itc).asStringRef() || (*itc).asStringRef() == "*"){
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selectedTracks.insert(trit->first);
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found = true;
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if ((*itc).asStringRef() != "*"){
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break;
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}
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}
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}
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}
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}
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}
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}
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}
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if (Util::Config::printDebugLevel >= DLVL_MEDIUM){
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//print the selected tracks
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std::stringstream selected;
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if (selectedTracks.size()){
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for (std::set<long unsigned int>::iterator it = selectedTracks.begin(); it != selectedTracks.end(); it++){
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if (it != selectedTracks.begin()){
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selected << ", ";
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}
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selected << (*it);
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}
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}
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DEBUG_MSG(DLVL_MEDIUM, "Selected tracks: %s (%lu)", selected.str().c_str(), selectedTracks.size());
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}
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if (selectedTracks.size() == 0) {
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INSANE_MSG("We didn't find any tracks which that we can use. selectedTrack.size() is 0.");
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for (std::map<unsigned int,DTSC::Track>::iterator trit = myMeta.tracks.begin(); trit != myMeta.tracks.end(); trit++){
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INSANE_MSG("Found track/codec: %s", trit->second.codec.c_str());
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}
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static std::string source;
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if (!source.size()){
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IPC::sharedPage serverCfg(SHM_CONF, DEFAULT_CONF_PAGE_SIZE, false, false); ///< Contains server configuration and capabilities
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IPC::semaphore configLock(SEM_CONF, O_CREAT | O_RDWR, ACCESSPERMS, 1);
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configLock.wait();
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std::string smp = streamName.substr(0, streamName.find_first_of("+ "));
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//check if smp (everything before + or space) exists
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DTSC::Scan streamCfg = DTSC::Scan(serverCfg.mapped, serverCfg.len).getMember("streams").getMember(smp);
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if (streamCfg){
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source = streamCfg.getMember("source").asString();
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}
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configLock.post();
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configLock.close();
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}
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if (!myMeta.tracks.size() && (source.find("dtsc://") == 0)){
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//Wait 5 seconds and try again. Keep a counter, try at most 3 times
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static int counter = 0;
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if (counter++ < 10){
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Util::wait(1000);
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nProxy.userClient.keepAlive();
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stats();
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updateMeta();
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selectDefaultTracks();
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}
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}
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}
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}
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/// Clears the buffer, sets parseData to false, and generally makes not very much happen at all.
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void Output::stop(){
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buffer.clear();
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parseData = false;
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}
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unsigned int Output::getKeyForTime(long unsigned int trackId, long long timeStamp){
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DTSC::Track & trk = myMeta.tracks[trackId];
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if (!trk.keys.size()){
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return 0;
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}
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unsigned int keyNo = trk.keys.begin()->getNumber();
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unsigned int partCount = 0;
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std::deque<DTSC::Key>::iterator it;
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for (it = trk.keys.begin(); it != trk.keys.end() && it->getTime() <= timeStamp; it++){
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keyNo = it->getNumber();
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partCount += it->getParts();
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}
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//if the time is before the next keyframe but after the last part, correctly seek to next keyframe
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if (partCount && it != trk.keys.end() && timeStamp > it->getTime() - trk.parts[partCount-1].getDuration()){
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++keyNo;
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}
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return keyNo;
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}
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int Output::pageNumForKey(long unsigned int trackId, long long int keyNum){
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if (!nProxy.metaPages.count(trackId) || !nProxy.metaPages[trackId].mapped){
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char id[NAME_BUFFER_SIZE];
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snprintf(id, NAME_BUFFER_SIZE, SHM_TRACK_INDEX, streamName.c_str(), trackId);
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nProxy.metaPages[trackId].init(id, SHM_TRACK_INDEX_SIZE);
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}
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if (!nProxy.metaPages[trackId].mapped){return -1;}
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int len = nProxy.metaPages[trackId].len / 8;
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for (int i = 0; i < len; i++){
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int * tmpOffset = (int *)(nProxy.metaPages[trackId].mapped + (i * 8));
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long amountKey = ntohl(tmpOffset[1]);
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if (amountKey == 0){continue;}
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long tmpKey = ntohl(tmpOffset[0]);
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if (tmpKey <= keyNum && ((tmpKey?tmpKey:1) + amountKey) > keyNum){
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return tmpKey;
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}
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}
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return -1;
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}
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/// Gets the highest page number available for the given trackId.
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int Output::pageNumMax(long unsigned int trackId){
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if (!nProxy.metaPages.count(trackId) || !nProxy.metaPages[trackId].mapped){
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char id[NAME_BUFFER_SIZE];
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snprintf(id, NAME_BUFFER_SIZE, SHM_TRACK_INDEX, streamName.c_str(), trackId);
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nProxy.metaPages[trackId].init(id, SHM_TRACK_INDEX_SIZE);
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}
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if (!nProxy.metaPages[trackId].mapped){return -1;}
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int len = nProxy.metaPages[trackId].len / 8;
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int highest = -1;
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for (int i = 0; i < len; i++){
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int * tmpOffset = (int *)(nProxy.metaPages[trackId].mapped + (i * 8));
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long amountKey = ntohl(tmpOffset[1]);
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if (amountKey == 0){continue;}
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long tmpKey = ntohl(tmpOffset[0]);
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if (tmpKey > highest){highest = tmpKey;}
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}
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return highest;
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}
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void Output::loadPageForKey(long unsigned int trackId, long long int keyNum){
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if (myMeta.vod && keyNum > myMeta.tracks[trackId].keys.rbegin()->getNumber()){
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INFO_MSG("Seek in track %lu to key %lld aborted, is > %lld", trackId, keyNum, myMeta.tracks[trackId].keys.rbegin()->getNumber());
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nProxy.curPage.erase(trackId);
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currKeyOpen.erase(trackId);
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return;
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}
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VERYHIGH_MSG("Loading track %lu, containing key %lld", trackId, keyNum);
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unsigned int timeout = 0;
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unsigned long pageNum = pageNumForKey(trackId, keyNum);
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while (pageNum == -1){
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if (!timeout){
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HIGH_MSG("Requesting page with key %lu:%lld", trackId, keyNum);
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}
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++timeout;
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//if we've been waiting for this page for 3 seconds, reconnect to the stream - something might be going wrong...
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if (timeout == 30){
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DEVEL_MSG("Loading is taking longer than usual, reconnecting to stream %s...", streamName.c_str());
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reconnect();
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}
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if (timeout > 100){
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FAIL_MSG("Timeout while waiting for requested page %lld for track %lu. Aborting.", keyNum, trackId);
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nProxy.curPage.erase(trackId);
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currKeyOpen.erase(trackId);
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return;
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}
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if (keyNum){
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nxtKeyNum[trackId] = keyNum-1;
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}else{
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nxtKeyNum[trackId] = 0;
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}
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stats(true);
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Util::wait(100);
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pageNum = pageNumForKey(trackId, keyNum);
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}
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if (keyNum){
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nxtKeyNum[trackId] = keyNum-1;
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}else{
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nxtKeyNum[trackId] = 0;
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}
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stats(true);
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if (currKeyOpen.count(trackId) && currKeyOpen[trackId] == (unsigned int)pageNum){
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return;
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}
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char id[NAME_BUFFER_SIZE];
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snprintf(id, NAME_BUFFER_SIZE, SHM_TRACK_DATA, streamName.c_str(), trackId, pageNum);
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nProxy.curPage[trackId].init(id, DEFAULT_DATA_PAGE_SIZE);
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if (!(nProxy.curPage[trackId].mapped)){
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FAIL_MSG("Initializing page %s failed", nProxy.curPage[trackId].name.c_str());
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return;
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}
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currKeyOpen[trackId] = pageNum;
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VERYHIGH_MSG("Page %s loaded for %s", id, streamName.c_str());
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}
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/// Prepares all tracks from selectedTracks for seeking to the specified ms position.
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void Output::seek(unsigned long long pos){
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sought = true;
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firstTime = Util::getMS() - pos;
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if (!isInitialized){
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initialize();
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}
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buffer.clear();
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thisPacket.null();
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if (myMeta.live){
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updateMeta();
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}
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MEDIUM_MSG("Seeking to %llums", pos);
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for (std::set<long unsigned int>::iterator it = selectedTracks.begin(); it != selectedTracks.end(); it++){
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if (myMeta.tracks.count(*it)){
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seek(*it, pos);
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}
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}
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}
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bool Output::seek(unsigned int tid, unsigned long long pos, bool getNextKey){
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if (myMeta.tracks[tid].lastms < pos){
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INFO_MSG("Aborting seek to %llums in track %u: past end of track (= %llums).", pos, tid, myMeta.tracks[tid].lastms);
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return false;
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}
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unsigned int keyNum = getKeyForTime(tid, pos);
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if (myMeta.tracks[tid].getKey(keyNum).getTime() > pos){
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if (myMeta.live){
|
|
INFO_MSG("Actually seeking to %d, for %d is not available any more", myMeta.tracks[tid].getKey(keyNum).getTime(), pos);
|
|
pos = myMeta.tracks[tid].getKey(keyNum).getTime();
|
|
}
|
|
}
|
|
loadPageForKey(tid, keyNum + (getNextKey?1:0));
|
|
if (!nProxy.curPage.count(tid) || !nProxy.curPage[tid].mapped){
|
|
INFO_MSG("Aborting seek to %llums in track %u: not available.", pos, tid);
|
|
return false;
|
|
}
|
|
sortedPageInfo tmp;
|
|
tmp.tid = tid;
|
|
tmp.offset = 0;
|
|
DTSC::Packet tmpPack;
|
|
tmpPack.reInit(nProxy.curPage[tid].mapped + tmp.offset, 0, true);
|
|
tmp.time = tmpPack.getTime();
|
|
char * mpd = nProxy.curPage[tid].mapped;
|
|
while ((long long)tmp.time < pos && tmpPack){
|
|
tmp.offset += tmpPack.getDataLen();
|
|
tmpPack.reInit(mpd + tmp.offset, 0, true);
|
|
tmp.time = tmpPack.getTime();
|
|
}
|
|
if (tmpPack){
|
|
HIGH_MSG("Sought to time %d in %s@%u", tmp.time, streamName.c_str(), tid);
|
|
buffer.insert(tmp);
|
|
return true;
|
|
}else{
|
|
//don't print anything for empty packets - not sign of corruption, just unfinished stream.
|
|
if (nProxy.curPage[tid].mapped[tmp.offset] != 0){
|
|
FAIL_MSG("Noes! Couldn't find packet on track %d because of some kind of corruption error or somesuch.", tid);
|
|
}else{
|
|
VERYHIGH_MSG("Track %d no data (key %u @ %u) - waiting...", tid, getKeyForTime(tid, pos) + (getNextKey?1:0), tmp.offset);
|
|
unsigned int i = 0;
|
|
while (nProxy.curPage[tid].mapped[tmp.offset] == 0 && ++i < 42){
|
|
Util::wait(100);
|
|
}
|
|
if (nProxy.curPage[tid].mapped[tmp.offset] == 0){
|
|
FAIL_MSG("Track %d no data (key %u) - timeout", tid, getKeyForTime(tid, pos) + (getNextKey?1:0));
|
|
}else{
|
|
return seek(tid, pos, getNextKey);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
|
|
void Output::requestHandler(){
|
|
static bool firstData = true;//only the first time, we call onRequest if there's data buffered already.
|
|
if ((firstData && myConn.Received().size()) || myConn.spool()){
|
|
firstData = false;
|
|
DEBUG_MSG(DLVL_DONTEVEN, "onRequest");
|
|
onRequest();
|
|
}else{
|
|
if (!isBlocking && !parseData){
|
|
Util::sleep(500);
|
|
}
|
|
}
|
|
}
|
|
|
|
int Output::run() {
|
|
DONTEVEN_MSG("MistOut client handler started");
|
|
while (config->is_active && myConn && (wantRequest || parseData)){
|
|
if (wantRequest){
|
|
requestHandler();
|
|
}
|
|
if (parseData){
|
|
if (!isInitialized){
|
|
initialize();
|
|
}
|
|
if ( !sentHeader){
|
|
DONTEVEN_MSG("sendHeader");
|
|
sendHeader();
|
|
}
|
|
if (!sought){
|
|
if (myMeta.live){
|
|
long unsigned int mainTrack = getMainSelectedTrack();
|
|
//cancel if there are no keys in the main track
|
|
if (!myMeta.tracks.count(mainTrack) || !myMeta.tracks[mainTrack].keys.size()){break;}
|
|
//seek to the newest keyframe, unless that is <5s, then seek to the oldest keyframe
|
|
unsigned long long seekPos = myMeta.tracks[mainTrack].keys.rbegin()->getTime();
|
|
if (seekPos < 5000){
|
|
seekPos = myMeta.tracks[mainTrack].keys.begin()->getTime();
|
|
}
|
|
seek(seekPos);
|
|
}else{
|
|
seek(0);
|
|
}
|
|
}
|
|
if (prepareNext()){
|
|
if (thisPacket){
|
|
|
|
|
|
//slow down processing, if real time speed is wanted
|
|
if (realTime){
|
|
while (thisPacket.getTime() > (((Util::getMS() - firstTime)*1000)+maxSkipAhead)/realTime) {
|
|
Util::sleep(std::min(thisPacket.getTime() - (((Util::getMS() - firstTime)*1000)+minSkipAhead)/realTime, 1000llu));
|
|
stats();
|
|
}
|
|
}
|
|
|
|
//delay the stream until its current keyframe is complete, if only complete keys wanted
|
|
if (completeKeysOnly){
|
|
bool completeKeyReady = false;
|
|
int timeoutTries = 40;//wait default 250ms*40=10 seconds
|
|
for (std::map<unsigned int, DTSC::Track>::iterator it = myMeta.tracks.begin(); it != myMeta.tracks.end(); it++){
|
|
if (it->second.keys.size() >1){
|
|
int thisTimeoutTries = ((it->second.lastms - it->second.firstms) / (it->second.keys.size()-1)) / 125;
|
|
if (thisTimeoutTries > timeoutTries) timeoutTries = thisTimeoutTries;
|
|
}
|
|
}
|
|
while(!completeKeyReady && timeoutTries>0){
|
|
completeKeyReady = true;
|
|
for (std::set<unsigned long>::iterator it = selectedTracks.begin(); it != selectedTracks.end(); it++){
|
|
if (!myMeta.tracks[*it].keys.size() || myMeta.tracks[*it].keys.rbegin()->getTime() + myMeta.tracks[*it].keys.rbegin()->getLength() <= thisPacket.getTime() ){
|
|
completeKeyReady = false;
|
|
break;
|
|
}
|
|
}
|
|
if (!completeKeyReady){
|
|
timeoutTries--;//we count down
|
|
stats();
|
|
Util::wait(250);
|
|
updateMeta();
|
|
}
|
|
}
|
|
if (timeoutTries<=0){
|
|
WARN_MSG("Waiting for key frame timed out");
|
|
completeKeysOnly = false;
|
|
}
|
|
}
|
|
|
|
sendNext();
|
|
}else{
|
|
if (!onFinish()){
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
stats();
|
|
}
|
|
MEDIUM_MSG("MistOut client handler shutting down: %s, %s, %s", myConn.connected() ? "conn_active" : "conn_closed", wantRequest ? "want_request" : "no_want_request", parseData ? "parsing_data" : "not_parsing_data");
|
|
|
|
stats(true);
|
|
nProxy.userClient.finish();
|
|
statsPage.finish();
|
|
myConn.close();
|
|
return 0;
|
|
}
|
|
|
|
/// Returns the ID of the main selected track, or 0 if no tracks are selected.
|
|
/// The main track is the first video track, if any, and otherwise the first other track.
|
|
long unsigned int Output::getMainSelectedTrack(){
|
|
if (!selectedTracks.size()){
|
|
return 0;
|
|
}
|
|
for (std::set<long unsigned int>::iterator it = selectedTracks.begin(); it != selectedTracks.end(); it++){
|
|
if (myMeta.tracks.count(*it) && myMeta.tracks[*it].type == "video"){
|
|
return *it;
|
|
}
|
|
}
|
|
return *(selectedTracks.begin());
|
|
}
|
|
|
|
void Output::dropTrack(uint32_t trackId, std::string reason, bool probablyBad){
|
|
//depending on whether this is probably bad and the current debug level, print a message
|
|
unsigned int printLevel = DLVL_INFO;
|
|
if (probablyBad){
|
|
printLevel = DLVL_WARN;
|
|
}
|
|
DEBUG_MSG(printLevel, "Dropping %s (%s) track %lu@k%lu (nextP=%d, lastP=%d): %s", streamName.c_str(), myMeta.tracks[trackId].codec.c_str(), (long unsigned)trackId, nxtKeyNum[trackId]+1, pageNumForKey(trackId, nxtKeyNum[trackId]+1), pageNumMax(trackId), reason.c_str());
|
|
//now actually drop the track from the buffer
|
|
for (std::set<sortedPageInfo>::iterator it = buffer.begin(); it != buffer.end(); ++it){
|
|
if (it->tid == trackId){
|
|
buffer.erase(it);
|
|
break;
|
|
}
|
|
}
|
|
selectedTracks.erase(trackId);
|
|
}
|
|
|
|
///Attempts to prepare a new packet for output.
|
|
///If thisPacket evaluates to false, playback has completed.
|
|
///Could be called repeatedly in a loop if you really really want a new packet.
|
|
/// \returns true if thisPacket was filled with the next packet.
|
|
/// \returns false if we could not reliably determine the next packet yet.
|
|
bool Output::prepareNext(){
|
|
static bool atLivePoint = false;
|
|
static int nonVideoCount = 0;
|
|
static unsigned int emptyCount = 0;
|
|
if (!buffer.size()){
|
|
thisPacket.null();
|
|
INFO_MSG("Buffer completely played out");
|
|
return true;
|
|
}
|
|
sortedPageInfo nxt = *(buffer.begin());
|
|
|
|
if (!myMeta.tracks.count(nxt.tid)){
|
|
dropTrack(nxt.tid, "disappeared from metadata", true);
|
|
return false;
|
|
}
|
|
|
|
DONTEVEN_MSG("Loading track %u (next=%lu), %llu ms", nxt.tid, nxtKeyNum[nxt.tid], nxt.time);
|
|
|
|
//if we're going to read past the end of the data page, load the next page
|
|
//this only happens for VoD
|
|
if (nxt.offset >= nProxy.curPage[nxt.tid].len){
|
|
nxtKeyNum[nxt.tid] = getKeyForTime(nxt.tid, thisPacket.getTime());
|
|
loadPageForKey(nxt.tid, ++nxtKeyNum[nxt.tid]);
|
|
nxt.offset = 0;
|
|
if (nProxy.curPage.count(nxt.tid) && nProxy.curPage[nxt.tid].mapped){
|
|
if (getDTSCTime(nProxy.curPage[nxt.tid].mapped, nxt.offset) < nxt.time){
|
|
dropTrack(nxt.tid, "time going backwards");
|
|
}else{
|
|
nxt.time = getDTSCTime(nProxy.curPage[nxt.tid].mapped, nxt.offset);
|
|
//swap out the next object in the buffer with a new one
|
|
buffer.erase(buffer.begin());
|
|
buffer.insert(nxt);
|
|
}
|
|
}else{
|
|
dropTrack(nxt.tid, "page load failure", true);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
//have we arrived at the end of the memory page? (4 zeroes mark the end)
|
|
if (!memcmp(nProxy.curPage[nxt.tid].mapped + nxt.offset, "\000\000\000\000", 4)){
|
|
//if we don't currently know where we are, we're lost. We should drop the track.
|
|
if (!nxt.time){
|
|
dropTrack(nxt.tid, "timeless empty packet");
|
|
return false;
|
|
}
|
|
//if this is a live stream, we might have just reached the live point.
|
|
//check where the next key is
|
|
nxtKeyNum[nxt.tid] = getKeyForTime(nxt.tid, thisPacket.getTime());
|
|
int nextPage = pageNumForKey(nxt.tid, nxtKeyNum[nxt.tid]+1);
|
|
//are we live, and the next key hasn't shown up on another page, then we're waiting.
|
|
if (myMeta.live && currKeyOpen.count(nxt.tid) && (currKeyOpen[nxt.tid] == (unsigned int)nextPage || nextPage == -1)){
|
|
if (++emptyCount < 100){
|
|
Util::wait(250);
|
|
//we're waiting for new data to show up
|
|
if (emptyCount % 8 == 0){
|
|
reconnect();//reconnect every 2 seconds
|
|
}else{
|
|
if (emptyCount % 4 == 0){
|
|
updateMeta();
|
|
}
|
|
}
|
|
}else{
|
|
//after ~25 seconds, give up and drop the track.
|
|
dropTrack(nxt.tid, "could not reload empty packet");
|
|
}
|
|
return false;
|
|
}
|
|
|
|
//We've simply reached the end of the page. Load the next key = next page.
|
|
loadPageForKey(nxt.tid, ++nxtKeyNum[nxt.tid]);
|
|
nxt.offset = 0;
|
|
if (nProxy.curPage.count(nxt.tid) && nProxy.curPage[nxt.tid].mapped){
|
|
unsigned long long nextTime = getDTSCTime(nProxy.curPage[nxt.tid].mapped, nxt.offset);
|
|
if (nextTime && nextTime < nxt.time){
|
|
dropTrack(nxt.tid, "time going backwards");
|
|
}else{
|
|
if (nextTime){
|
|
nxt.time = nextTime;
|
|
}
|
|
//swap out the next object in the buffer with a new one
|
|
buffer.erase(buffer.begin());
|
|
buffer.insert(nxt);
|
|
MEDIUM_MSG("Next page for track %u starts at %llu.", nxt.tid, nxt.time);
|
|
}
|
|
}else{
|
|
dropTrack(nxt.tid, "page load failure");
|
|
}
|
|
return false;
|
|
}
|
|
|
|
//we've handled all special cases - at this point the packet should exist
|
|
//let's load it
|
|
thisPacket.reInit(nProxy.curPage[nxt.tid].mapped + nxt.offset, 0, true);
|
|
//if it failed, drop the track and continue
|
|
if (!thisPacket){
|
|
dropTrack(nxt.tid, "packet load failure");
|
|
return false;
|
|
}
|
|
emptyCount = 0;//valid packet - reset empty counter
|
|
|
|
//if there's a timestamp mismatch, print this.
|
|
//except for live, where we never know the time in advance
|
|
if (thisPacket.getTime() != nxt.time && nxt.time && !atLivePoint){
|
|
static int warned = 0;
|
|
if (warned < 5){
|
|
WARN_MSG("Loaded %s track %ld@%llu in stead of %u@%llu (%dms, %s)", streamName.c_str(), thisPacket.getTrackId(), thisPacket.getTime(), nxt.tid, nxt.time, (int)((long long)thisPacket.getTime() - (long long)nxt.time), myMeta.tracks[nxt.tid].codec.c_str());
|
|
if (++warned == 5){
|
|
WARN_MSG("Further warnings about time mismatches printed on HIGH level.");
|
|
}
|
|
}else{
|
|
HIGH_MSG("Loaded %s track %ld@%llu in stead of %u@%llu (%dms, %s)", streamName.c_str(), thisPacket.getTrackId(), thisPacket.getTime(), nxt.tid, nxt.time, (int)((long long)thisPacket.getTime() - (long long)nxt.time), myMeta.tracks[nxt.tid].codec.c_str());
|
|
}
|
|
}
|
|
|
|
//when live, every keyframe, check correctness of the keyframe number
|
|
if (myMeta.live && thisPacket.getFlag("keyframe")){
|
|
//Check whether returned keyframe is correct. If not, wait for approximately 10 seconds while checking.
|
|
//Failure here will cause tracks to drop due to inconsistent internal state.
|
|
nxtKeyNum[nxt.tid] = getKeyForTime(nxt.tid, thisPacket.getTime());
|
|
int counter = 0;
|
|
while(counter < 40 && myMeta.tracks[nxt.tid].getKey(nxtKeyNum[nxt.tid]).getTime() != thisPacket.getTime()){
|
|
if (counter++){
|
|
//Only sleep 250ms if this is not the first updatemeta try
|
|
Util::wait(250);
|
|
}
|
|
updateMeta();
|
|
nxtKeyNum[nxt.tid] = getKeyForTime(nxt.tid, thisPacket.getTime());
|
|
}
|
|
if (myMeta.tracks[nxt.tid].getKey(nxtKeyNum[nxt.tid]).getTime() != thisPacket.getTime()){
|
|
WARN_MSG("Keyframe value is not correct - state will now be inconsistent.");
|
|
}
|
|
EXTREME_MSG("Track %u @ %llums = key %lu", nxt.tid, thisPacket.getTime(), nxtKeyNum[nxt.tid]);
|
|
}
|
|
|
|
//always assume we're not at the live point
|
|
atLivePoint = false;
|
|
//we assume the next packet is the next on this same page
|
|
nxt.offset += thisPacket.getDataLen();
|
|
if (nxt.offset < nProxy.curPage[nxt.tid].len){
|
|
unsigned long long nextTime = getDTSCTime(nProxy.curPage[nxt.tid].mapped, nxt.offset);
|
|
if (nextTime){
|
|
nxt.time = nextTime;
|
|
}else{
|
|
++nxt.time;
|
|
//no packet -> we are at the live point
|
|
atLivePoint = true;
|
|
}
|
|
}
|
|
|
|
//exchange the current packet in the buffer for the next one
|
|
buffer.erase(buffer.begin());
|
|
buffer.insert(nxt);
|
|
|
|
return true;
|
|
}
|
|
|
|
/// Returns the name as it should be used in statistics.
|
|
/// Outputs used as an input should return INPUT, outputs used for automation should return OUTPUT, others should return their proper name.
|
|
/// The default implementation is usually good enough for all the non-INPUT types.
|
|
std::string Output::getStatsName(){
|
|
if (config->hasOption("target") && config->getString("target").size()){
|
|
return "OUTPUT";
|
|
}else{
|
|
return capa["name"].asStringRef();
|
|
}
|
|
}
|
|
|
|
void Output::stats(bool force){
|
|
//cancel stats update if not initialized
|
|
if (!isInitialized){return;}
|
|
//also cancel if it has been less than a second since the last update
|
|
//unless force is set to true
|
|
unsigned long long int now = Util::epoch();
|
|
if (now == lastStats && !force){return;}
|
|
lastStats = now;
|
|
|
|
EXTREME_MSG("Writing stats: %s, %s, %lu", getConnectedHost().c_str(), streamName.c_str(), crc & 0xFFFFFFFFu);
|
|
if (statsPage.getData()){
|
|
IPC::statExchange tmpEx(statsPage.getData());
|
|
tmpEx.now(now);
|
|
if (tmpEx.host() == std::string("\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000", 16)){
|
|
tmpEx.host(getConnectedBinHost());
|
|
}
|
|
tmpEx.crc(crc);
|
|
tmpEx.streamName(streamName);
|
|
tmpEx.connector(getStatsName());
|
|
tmpEx.up(myConn.dataUp());
|
|
tmpEx.down(myConn.dataDown());
|
|
tmpEx.time(now - myConn.connTime());
|
|
if (thisPacket){
|
|
tmpEx.lastSecond(thisPacket.getTime());
|
|
}else{
|
|
tmpEx.lastSecond(0);
|
|
}
|
|
statsPage.keepAlive();
|
|
}
|
|
int tNum = 0;
|
|
if (!nProxy.userClient.getData()){
|
|
char userPageName[NAME_BUFFER_SIZE];
|
|
snprintf(userPageName, NAME_BUFFER_SIZE, SHM_USERS, streamName.c_str());
|
|
nProxy.userClient = IPC::sharedClient(userPageName, PLAY_EX_SIZE, true);
|
|
if (!nProxy.userClient.getData()){
|
|
WARN_MSG("Player connection failure - aborting output");
|
|
myConn.close();
|
|
return;
|
|
}
|
|
}
|
|
if (!nProxy.userClient.isAlive()){
|
|
myConn.close();
|
|
return;
|
|
}
|
|
if (!nProxy.trackMap.size()){
|
|
IPC::userConnection userConn(nProxy.userClient.getData());
|
|
for (std::set<unsigned long>::iterator it = selectedTracks.begin(); it != selectedTracks.end() && tNum < SIMUL_TRACKS; it++){
|
|
userConn.setTrackId(tNum, *it);
|
|
userConn.setKeynum(tNum, nxtKeyNum[*it]);
|
|
tNum ++;
|
|
}
|
|
}
|
|
nProxy.userClient.keepAlive();
|
|
if (tNum > SIMUL_TRACKS){
|
|
WARN_MSG("Too many tracks selected, using only first %d", SIMUL_TRACKS);
|
|
}
|
|
}
|
|
|
|
void Output::onRequest(){
|
|
//simply clear the buffer, we don't support any kind of input by default
|
|
myConn.Received().clear();
|
|
wantRequest = false;
|
|
}
|
|
|
|
void Output::sendHeader(){
|
|
//just set the sentHeader bool to true, by default
|
|
sentHeader = true;
|
|
}
|
|
|
|
bool Output::connectToFile(std::string file) {
|
|
int flags = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
|
|
int mode = O_RDWR | O_CREAT | O_TRUNC;
|
|
int outFile = open(file.c_str(), mode, flags);
|
|
if (outFile < 0) {
|
|
ERROR_MSG("Failed to open file %s, error: %s", file.c_str(), strerror(errno));
|
|
return false;
|
|
}
|
|
|
|
int r = dup2(outFile, myConn.getSocket());
|
|
if (r == -1) {
|
|
ERROR_MSG("Failed to create an alias for the socket using dup2: %s.", strerror(errno));
|
|
return false;
|
|
}
|
|
close(outFile);
|
|
return true;
|
|
}
|
|
|
|
}
|
|
|