mythtranscodeplayer.cpp

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// MythTV
#include "mythtranscodeplayer.h"
 
#define LOC QString("TranscodePlayer: ")
 
MythTranscodePlayer::MythTranscodePlayer(PlayerContext *Context, PlayerFlags Flags)
  : MythPlayer(Context, Flags)
{
}
 
void MythTranscodePlayer::SetTranscoding(bool Transcoding)
{
    // TODO this is called too early to work but the second call to DecoderBase::SetTranscoding
    // is embedded in the middle of MythPlayer::OpenFile
    m_transcoding = Transcoding;
    if (m_decoder)
        m_decoder->SetTranscoding(Transcoding);
    else
        LOG(VB_GENERAL, LOG_WARNING, LOC + "No decoder yet - cannot set transcoding");
}
 
void MythTranscodePlayer::InitForTranscode(bool CopyAudio, bool CopyVideo)
{
    // Are these really needed?
    SetPlaying(true);
    m_keyframeDist = 30;
 
    if (!InitVideo())
    {
        LOG(VB_GENERAL, LOG_ERR, LOC + "Unable to initialize video for transcode.");
        SetPlaying(false);
        return;
    }
 
    m_framesPlayed = 0;
    ClearAfterSeek();
 
    if (CopyVideo && m_decoder)
        m_decoder->SetRawVideoState(true);
    if (CopyAudio && m_decoder)
        m_decoder->SetRawAudioState(true);
    if (m_decoder)
        m_decoder->SetSeekSnap(0);
}
 
void MythTranscodePlayer::SetCutList(const frm_dir_map_t& CutList)
{
    m_deleteMap.SetMap(CutList);
}
 
bool MythTranscodePlayer::TranscodeGetNextFrame(int &DidFF, bool &KeyFrame, bool HonorCutList)
{
    m_playerCtx->LockPlayingInfo(__FILE__, __LINE__);
    if (m_playerCtx->m_playingInfo)
        m_playerCtx->m_playingInfo->UpdateInUseMark();
    m_playerCtx->UnlockPlayingInfo(__FILE__, __LINE__);
 
    int64_t lastDecodedFrameNumber = m_videoOutput->GetLastDecodedFrame()->m_frameNumber;
 
    if ((lastDecodedFrameNumber == 0) && HonorCutList)
        m_deleteMap.TrackerReset(0);
 
    if (!m_decoderThread)
        DecoderStart(true/*start paused*/);
 
    if (!m_decoder)
        return false;
 
    {
        QMutexLocker decoderlocker(&m_decoderChangeLock);
        if (!DoGetFrame(kDecodeAV))
            return false;
    }
 
    if (GetEof() != kEofStateNone)
        return false;
 
    if (HonorCutList && !m_deleteMap.IsEmpty())
    {
        if (m_totalFrames && lastDecodedFrameNumber >= static_cast<int64_t>(m_totalFrames))
            return false;
 
        uint64_t jumpto = 0;
        if (m_deleteMap.TrackerWantsToJump(static_cast<uint64_t>(lastDecodedFrameNumber), jumpto))
        {
            LOG(VB_GENERAL, LOG_INFO, LOC + QString("Fast-Forwarding from %1 to %2")
                .arg(lastDecodedFrameNumber).arg(jumpto));
            if (jumpto >= m_totalFrames)
            {
                SetEof(kEofStateDelayed);
                return false;
            }
 
            // For 0.25, move this to DoJumpToFrame(jumpto)
            WaitForSeek(jumpto, 0);
            m_decoder->ClearStoredData();
            ClearAfterSeek();
            m_decoderChangeLock.lock();
            DoGetFrame(kDecodeAV);
            m_decoderChangeLock.unlock();
            DidFF = 1;
        }
    }
    if (GetEof() != kEofStateNone)
        return false;
    KeyFrame = m_decoder->IsLastFrameKey();
    return true;
}
 
long MythTranscodePlayer::UpdateStoredFrameNum(long CurrentFrameNum)
{
    if (m_decoder)
        return m_decoder->UpdateStoredFrameNum(CurrentFrameNum);
    return 0;
}
 
bool MythTranscodePlayer::WriteStoredData(MythMediaBuffer* OutBuffer,
                                          bool Writevideo,
                                          std::chrono::milliseconds TimecodeOffset)
{
    if (!m_decoder)
        return false;
    if (Writevideo && !m_decoder->GetRawVideoState())
        Writevideo = false;
    m_decoder->WriteStoredData(OutBuffer, Writevideo, TimecodeOffset);
    return Writevideo;
}