예제 #1
0
파일: Segment.cpp 프로젝트: Distrotech/vlc
SegmentChunk* Segment::toChunk(size_t index, BaseRepresentation *ctxrep)
{
    SegmentChunk *chunk = ISegment::toChunk(index, ctxrep);
    if (chunk && ctxrep)
        chunk->setBitrate(ctxrep->getBandwidth());
    return chunk;
}
예제 #2
0
파일: Segment.cpp 프로젝트: 0xheart0/vlc
SegmentChunk* ISegment::toChunk(size_t index, BaseRepresentation *ctxrep, HTTPConnectionManager *connManager)
{
    SegmentChunk *chunk;
    try
    {
        chunk = getChunk(getUrlSegment().toString(index, ctxrep), connManager);
        if (!chunk)
            return NULL;
    }
    catch (int)
    {
        return NULL;
    };

    chunk->setRepresentation(ctxrep);

    return chunk;
}
예제 #3
0
파일: Segment.cpp 프로젝트: Distrotech/vlc
SegmentChunk* ISegment::toChunk(size_t index, BaseRepresentation *ctxrep)
{
    SegmentChunk *chunk;
    try
    {
        chunk = getChunk(getUrlSegment().toString(index, ctxrep));
        if (!chunk)
            return NULL;
    }
    catch (int)
    {
        return NULL;
    }

    if(startByte != endByte)
    {
        chunk->setStartByte(startByte);
        chunk->setEndByte(endByte);
    }

    chunk->setRepresentation(ctxrep);

    return chunk;
}
예제 #4
0
파일: Streams.cpp 프로젝트: kraftdream/vlc
block_t * AbstractStream::readNextBlock(size_t toread)
{
    SegmentChunk *chunk = getChunk();
    if(!chunk)
        return NULL;

    if(format != chunk->getStreamFormat())
    {
        /* Force stream to end for this call */
        msg_Info(p_realdemux, "Changing stream format %u->%u",
                 (unsigned)format, (unsigned)chunk->getStreamFormat());

        restarting_output = true;
        format = chunk->getStreamFormat();
        /* Next stream will use current unused chunk */
        return NULL;
    }

    if(chunk->discontinuity)
    {
        discontinuity = true;
        chunk->discontinuity = false;
        msg_Info(p_realdemux, "Encountered discontinuity");
        return NULL;
    }

    const bool b_segment_head_chunk = (chunk->getBytesRead() == 0);

    block_t *block = chunk->read(toread);
    if(block == NULL)
    {
        currentChunk = NULL;
        delete chunk;
        return NULL;
    }

    if (chunk->getBytesToRead() == 0)
    {
        currentChunk = NULL;
        delete chunk;
    }

    block = checkBlock(block, b_segment_head_chunk);

    return block;
}
예제 #5
0
파일: Streams.cpp 프로젝트: JatWaston/vlc
size_t Stream::read(HTTPConnectionManager *connManager)
{
    SegmentChunk *chunk = getChunk();
    if(!chunk)
        return 0;

    if(!chunk->getConnection())
    {
       if(!connManager->connectChunk(chunk))
        return 0;
    }

    size_t readsize = 0;
    bool b_segment_head_chunk = false;

    /* New chunk, do query */
    if(chunk->getBytesRead() == 0)
    {
        if(chunk->getConnection()->query(chunk->getPath()) != VLC_SUCCESS)
        {
            chunk->getConnection()->releaseChunk();
            currentChunk = NULL;
            delete chunk;
            return 0;
        }
        b_segment_head_chunk = true;
    }

    /* Because we don't know Chunk size at start, we need to get size
       from content length */
    readsize = chunk->getBytesToRead();
    if (readsize > 32768)
        readsize = 32768;

    block_t *block = block_Alloc(readsize);
    if(!block)
        return 0;

    mtime_t time = mdate();
    ssize_t ret = chunk->getConnection()->read(block->p_buffer, readsize);
    time = mdate() - time;

    if(ret < 0)
    {
        block_Release(block);
        chunk->getConnection()->releaseChunk();
        currentChunk = NULL;
        delete chunk;
        return 0;
    }
    else
    {
        block->i_buffer = (size_t)ret;

        adaptationLogic->updateDownloadRate(block->i_buffer, time);
        chunk->onDownload(&block);

        StreamFormat chunkStreamFormat = chunk->getStreamFormat();
        if(output && chunkStreamFormat != output->getStreamFormat())
        {
            msg_Info(p_demux, "Changing stream format");
            updateFormat(chunkStreamFormat);
        }

        if (chunk->getBytesToRead() == 0)
        {
            chunk->getConnection()->releaseChunk();
            currentChunk = NULL;
            delete chunk;
        }
    }

    readsize = block->i_buffer;

    if(output)
        output->pushBlock(block, b_segment_head_chunk);
    else
        block_Release(block);

    return readsize;
}
예제 #6
0
SegmentChunk * SegmentTracker::getNextChunk(bool switch_allowed, HTTPConnectionManager *connManager)
{
    BaseRepresentation *rep = NULL;
    ISegment *segment;

    if(!adaptationSet)
        return NULL;

    /* Ensure we don't keep chaining init/index without data */
    if( initializing )
    {
        if( prevRepresentation )
            switch_allowed = false;
        else
            switch_allowed = true;
    }

    if( !switch_allowed ||
       (prevRepresentation && prevRepresentation->getSwitchPolicy() == SegmentInformation::SWITCH_UNAVAILABLE) )
        rep = prevRepresentation;
    else
        rep = logic->getNextRepresentation(adaptationSet, prevRepresentation);

    if ( rep == NULL )
            return NULL;


    if(rep != prevRepresentation)
    {
        notify(SegmentTrackerEvent(prevRepresentation, rep));
        prevRepresentation = rep;
        init_sent = false;
        index_sent = false;
        initializing = true;
    }

    /* Ensure ephemere content is updated/loaded */
    if(rep->needsUpdate())
        updateSelected();

    if(!init_sent)
    {
        init_sent = true;
        segment = rep->getSegment(BaseRepresentation::INFOTYPE_INIT);
        if(segment)
            return segment->toChunk(count, rep, connManager);
    }

    if(!index_sent)
    {
        index_sent = true;
        segment = rep->getSegment(BaseRepresentation::INFOTYPE_INDEX);
        if(segment)
            return segment->toChunk(count, rep, connManager);
    }

    bool b_gap = false;
    segment = rep->getNextSegment(BaseRepresentation::INFOTYPE_MEDIA, count, &count, &b_gap);
    if(!segment)
    {
        reset();
        return NULL;
    }

    /* stop initializing after 1st chunk */
    initializing = false;

    SegmentChunk *chunk = segment->toChunk(count, rep, connManager);
    if(chunk)
        count++;

    /* We need to check segment/chunk format changes, as we can't rely on representation's (HLS)*/
    if(format != chunk->getStreamFormat())
    {
        format = chunk->getStreamFormat();
        notify(SegmentTrackerEvent(&format));
    }

    /* Handle both implicit and explicit discontinuities */
    if( (b_gap && count) || (chunk && chunk->discontinuity) )
    {
        notify(SegmentTrackerEvent(chunk));
    }

    return chunk;
}
예제 #7
0
파일: Streams.cpp 프로젝트: kallolpar/vlc
block_t * AbstractStream::readNextBlock(size_t)
{
    SegmentChunk *chunk = getChunk();
    if(!chunk)
        return NULL;

    if(format != chunk->getStreamFormat())
    {
        /* Force stream to end for this call */
        msg_Info(p_realdemux, "Changing stream format %u->%u",
                 (unsigned)format, (unsigned)chunk->getStreamFormat());

        restarting_output = true;
        format = chunk->getStreamFormat();
        /* Next stream will use current unused chunk */
        return NULL;
    }

    if(chunk->discontinuity)
    {
        discontinuity = true;
        chunk->discontinuity = false;
        msg_Info(p_realdemux, "Encountered discontinuity");
        return NULL;
    }

    if(!chunk->getConnection())
    {
       if(!connManager->connectChunk(chunk))
        return NULL;
    }

    size_t readsize = 0;
    bool b_segment_head_chunk = false;

    /* New chunk, do query */
    if(chunk->getBytesRead() == 0)
    {
        if(chunk->getConnection()->query(chunk->getPath()) != VLC_SUCCESS)
        {
            chunk->getConnection()->releaseChunk();
            currentChunk = NULL;
            delete chunk;
            return NULL;
        }
        b_segment_head_chunk = true;
    }

    /* Because we don't know Chunk size at start, we need to get size
       from content length */
    readsize = chunk->getBytesToRead();
    if (readsize > 32768)
        readsize = 32768;

    block_t *block = block_Alloc(readsize);
    if(!block)
        return NULL;

    mtime_t time = mdate();
    ssize_t ret = chunk->getConnection()->read(block->p_buffer, readsize);
    time = mdate() - time;

    if(ret < 0)
    {
        block_Release(block);
        chunk->getConnection()->releaseChunk();
        currentChunk = NULL;
        delete chunk;
        return NULL;
    }
    else
    {
        block->i_buffer = (size_t)ret;

        adaptationLogic->updateDownloadRate(block->i_buffer, time);
        chunk->onDownload(&block);

        if (chunk->getBytesToRead() == 0)
        {
            chunk->getConnection()->releaseChunk();
            currentChunk = NULL;
            delete chunk;
        }
    }

    block = checkBlock(block, b_segment_head_chunk);

    return block;
}
예제 #8
0
SegmentChunk * SegmentTracker::getNextChunk(bool switch_allowed, HTTPConnectionManager *connManager)
{
    BaseRepresentation *rep = NULL, *prevRep = NULL;
    ISegment *segment;

    if(!adaptationSet)
        return NULL;

    /* Ensure we don't keep chaining init/index without data */
    if( initializing )
    {
        if( curRepresentation )
            switch_allowed = false;
        else
            switch_allowed = true;
    }

    if( !switch_allowed ||
       (curRepresentation && curRepresentation->getSwitchPolicy() == SegmentInformation::SWITCH_UNAVAILABLE) )
        rep = curRepresentation;
    else
        rep = logic->getNextRepresentation(adaptationSet, curRepresentation);

    if ( rep == NULL )
            return NULL;


    if(rep != curRepresentation)
    {
        notify(SegmentTrackerEvent(curRepresentation, rep));
        prevRep = curRepresentation;
        curRepresentation = rep;
        init_sent = false;
        index_sent = false;
        initializing = true;
    }

    bool b_updated = false;
    /* Ensure ephemere content is updated/loaded */
    if(rep->needsUpdate())
        b_updated = rep->runLocalUpdates(getPlaybackTime(), curNumber, false);

    if(prevRep && !rep->consistentSegmentNumber())
    {
        /* Convert our segment number */
        next = rep->translateSegmentNumber(next, prevRep);
    }
    else if(first && rep->getPlaylist()->isLive())
    {
        next = rep->getLiveStartSegmentNumber(next);
        first = false;
    }

    if(b_updated)
    {
        if(!rep->consistentSegmentNumber())
            curRepresentation->pruneBySegmentNumber(curNumber);
        curRepresentation->scheduleNextUpdate(next);
    }

    if(!init_sent)
    {
        init_sent = true;
        segment = rep->getSegment(BaseRepresentation::INFOTYPE_INIT);
        if(segment)
            return segment->toChunk(next, rep, connManager);
    }

    if(!index_sent)
    {
        index_sent = true;
        segment = rep->getSegment(BaseRepresentation::INFOTYPE_INDEX);
        if(segment)
            return segment->toChunk(next, rep, connManager);
    }

    bool b_gap = false;
    segment = rep->getNextSegment(BaseRepresentation::INFOTYPE_MEDIA, next, &next, &b_gap);
    if(!segment)
    {
        reset();
        return NULL;
    }

    if(initializing)
    {
        b_gap = false;
        /* stop initializing after 1st chunk */
        initializing = false;
    }

    SegmentChunk *chunk = segment->toChunk(next, rep, connManager);

    /* We need to check segment/chunk format changes, as we can't rely on representation's (HLS)*/
    if(chunk && format != chunk->getStreamFormat())
    {
        format = chunk->getStreamFormat();
        notify(SegmentTrackerEvent(&format));
    }

    /* Handle both implicit and explicit discontinuities */
    if( (b_gap && next) || (chunk && chunk->discontinuity) )
    {
        notify(SegmentTrackerEvent(chunk));
    }

    if(chunk)
    {
        curNumber = next;
        next++;
    }

    return chunk;
}
예제 #9
0
SegmentChunk * SegmentTracker::getNextChunk(bool switch_allowed,
                                            AbstractConnectionManager *connManager)
{
    /* LVP added, TFE DEBUG */
    //msg_Info(NULL, "TFE DEBUG SegmentTracker getNextChunk, %" PRId64, mdate());
    //std::cerr << "TFE DEBUG SegmentTracker getNextChunk, " << mdate() << std::endl;

    BaseRepresentation *rep = NULL, *prevRep = NULL;
    ISegment *segment;

    if(!adaptationSet) {

        /* LVP added, TFE DEBUG */
        //msg_Info(NULL, "TFE DEBUG SegmentTracker getNextChunk no adaptation set, %" PRId64, mdate());
        //std::cerr << "TFE DEBUG SegmentTracker getNextChunk no adaptation set, " << mdate() << std::endl;

        return NULL;
    }


    /* Ensure we don't keep chaining init/index without data */
    if( initializing )
    {
        if( curRepresentation )
            switch_allowed = false;
        else
            switch_allowed = true;
    }

    if( !switch_allowed ||
       (curRepresentation && curRepresentation->getSwitchPolicy() == SegmentInformation::SWITCH_UNAVAILABLE) )
        rep = curRepresentation;
    else
        rep = logic->getNextRepresentation(adaptationSet, curRepresentation);

    if ( rep == NULL ) {

        /* LVP added, TFE DEBUG */
        //msg_Info(NULL, "TFE DEBUG SegmentTracker no rep 1, %" PRId64, mdate());
        //std::cerr << "TFE DEBUG SegmentTracker no rep 1, " << mdate() << std::endl;

        return NULL;
    }


    if(rep != curRepresentation)
    {
        notify(SegmentTrackerEvent(curRepresentation, rep));
        prevRep = curRepresentation;
        curRepresentation = rep;
        init_sent = false;
        index_sent = false;
        initializing = true;
    }

    bool b_updated = false;
    /* Ensure ephemere content is updated/loaded */
    if(rep->needsUpdate())
        b_updated = rep->runLocalUpdates(getPlaybackTime(), curNumber, false);

    if(prevRep && !rep->consistentSegmentNumber())
    {
        /* Convert our segment number */
        next = rep->translateSegmentNumber(next, prevRep);
    }
    else if(first && rep->getPlaylist()->isLive())
    {
        next = rep->getLiveStartSegmentNumber(next);
        first = false;
    }

    if(b_updated)
    {
        if(!rep->consistentSegmentNumber())
            curRepresentation->pruneBySegmentNumber(curNumber);
        curRepresentation->scheduleNextUpdate(next);
    }

    if(rep->getStreamFormat() != format)
    {
        /* Initial format ? */
        if(format == StreamFormat(StreamFormat::UNSUPPORTED))
        {
            format = rep->getStreamFormat();
        }
        else
        {
            format = rep->getStreamFormat();
            notify(SegmentTrackerEvent(&format)); /* Notify new demux format */
            return NULL; /* Force current demux to end */
        }
    }

    if(format == StreamFormat(StreamFormat::UNSUPPORTED))
    {
        return NULL; /* Can't return chunk because no demux will be created */
    }

    if(!init_sent)
    {
        init_sent = true;
        segment = rep->getSegment(BaseRepresentation::INFOTYPE_INIT);
        if(segment) {
            /* LVP added, TFE DEBUG */
            std::cerr << "TFE DEBUG SegmentTracker getNextChunk no init sent but segment, " << mdate() << std::endl;
            //msg_Info(NULL, "TFE DEBUG SegmentTracker getNextChunk no init sent but segment, %" PRId64, mdate());
            //std::cerr << "TFE DEBUG SegmentTracker getNextChunk no init sent but segment, " << mdate() << std::endl;

            return segment->toChunk(next, rep, connManager);
        }
    }

    if(!index_sent)
    {
        index_sent = true;
        segment = rep->getSegment(BaseRepresentation::INFOTYPE_INDEX);
        if(segment) {
            /* LVP added, TFE DEBUG */
            // happens after no init sent
            //msg_Info(NULL, "TFE DEBUG SegmentTracker getNextChunk no index sent but segment, %" PRId64, mdate());
            //std::cerr << "TFE DEBUG SegmentTracker getNextChunk no index sent but segment, " << mdate() << std::endl;

            return segment->toChunk(next, rep, connManager);
        }

    }

    bool b_gap = false;
    segment = rep->getNextSegment(BaseRepresentation::INFOTYPE_MEDIA, next, &next, &b_gap);
    if(!segment)
    {
        reset();

        /* LVP added, TFE DEBUG */
        // once at the end
        //msg_Info(NULL, "TFE DEBUG SegmentTracker getNextChunk no segment and reset, %" PRId64, mdate());
        //std::cerr << "TFE DEBUG SegmentTracker getNextChunk no segment and reset, " << mdate() << std::endl;

        return NULL;
    }

    if(initializing)
    {
        b_gap = false;
        /* stop initializing after 1st chunk */
        initializing = false;
    }

    SegmentChunk *chunk = segment->toChunk(next, rep, connManager);

    /* Notify new segment length for stats / logic */
    if(chunk)
    {
        const Timescale timescale = rep->inheritTimescale();
        notify(SegmentTrackerEvent(rep->getAdaptationSet()->getID(),
                                   timescale.ToTime(segment->duration.Get())));
    }

    /* We need to check segment/chunk format changes, as we can't rely on representation's (HLS)*/
    if(chunk && format != chunk->getStreamFormat())
    {
        format = chunk->getStreamFormat();
        notify(SegmentTrackerEvent(&format));
    }

    /* Handle both implicit and explicit discontinuities */
    if( (b_gap && next) || (chunk && chunk->discontinuity) )
    {
        notify(SegmentTrackerEvent(chunk));
    }

    if(chunk)
    {
        curNumber = next;
        next++;
    }

    /* LVP added, TFE */
    //msg_Info(NULL, "TFE SegmentTracker getNextChunk done, %" PRId64 ", %" PRId64, mdate(), rep->getBandwidth());
    //std::cerr << "TFE SegmentTracker getNextChunk done, " << mdate() <<  ", " << rep->getBandwidth()  << std::endl;

    return chunk;
}