CWE-ou-minkata/Sources/Plasma/FeatureLib/pfMoviePlayer/plMoviePlayer.cpp

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

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*==LICENSE==*/

#include "plMoviePlayer.h"

#ifdef VIDEO_AVAILABLE
#   define VPX_CODEC_DISABLE_COMPAT 1
#   include <vpx/vpx_decoder.h>
#   include <vpx/vp8dx.h>
#   define iface (vpx_codec_vp9_dx())
#   include <opus.h>
#endif

#include "plGImage/plMipmap.h"
#include "pnKeyedObject/plUoid.h"
#include "plPipeline/hsGDeviceRef.h"
#include "plPipeline/plPlates.h"
#include "plPlanarImage.h"
#include "hsResMgr.h"
#include "hsTimer.h"
#include "plAudio/plWin32VideoSound.h"

#include "webm/mkvreader.hpp"
#include "webm/mkvparser.hpp"

#define SAFE_OP(x, err) \
    { \
        int64_t ret = 0; \
        ret = x; \
        if (ret == -1) \
        { \
            hsAssert(false, "failed to " err); \
            return false; \
        } \
    }

// =====================================================

class VPX
{
    VPX() { }

#ifdef VIDEO_AVAILABLE
public:
    vpx_codec_ctx_t codec;

    ~VPX() {
        if (vpx_codec_destroy(&codec))
            hsAssert(false, vpx_codec_error_detail(&codec));
    }

    static VPX* Create()
    {
        VPX* instance = new VPX;
        if(vpx_codec_dec_init(&instance->codec, iface, nullptr, 0))
        {
            hsAssert(false, vpx_codec_error_detail(&instance->codec));
            return nullptr;
        }
        return instance;
    }

    vpx_image_t* Decode(uint8_t* buf, uint32_t size)
    {
        if (vpx_codec_decode(&codec, buf, size, nullptr, 0) != VPX_CODEC_OK)
        {
            const char* detail = vpx_codec_error_detail(&codec);
            hsAssert(false, detail ? detail : "unspecified decode error");
            return nullptr;
        }

        vpx_codec_iter_t  iter = nullptr;
        // ASSUMPTION: only one image per frame
        // if this proves false, move decoder function into IProcessVideoFrame
        return vpx_codec_get_frame(&codec, &iter);
    }
#endif
};

// =====================================================

class TrackMgr
{
protected:
    const mkvparser::Track* fTrack;
    const mkvparser::BlockEntry* fCurrentBlock;
    int32_t fStatus;

public:
    TrackMgr(const mkvparser::Track* track) : fTrack(track), fCurrentBlock(nullptr), fStatus(0) { }

    const mkvparser::Track* GetTrack() { return fTrack; }

    bool GetFrames(mkvparser::MkvReader* reader, int64_t movieTime, std::vector<blkbuf_t>& frames)
    {
        // If we have no block yet, grab the first one
        if (!fCurrentBlock)
            fStatus = fTrack->GetFirst(fCurrentBlock);

        // Continue through the blocks until our current movie time
        while (fCurrentBlock && fStatus == 0)
        {
            const mkvparser::Block* block = fCurrentBlock->GetBlock();
            int64_t time = block->GetTime(fCurrentBlock->GetCluster()) - fTrack->GetCodecDelay();
            if (time <= movieTime * 1000000) // Block time is nano seconds
            {
                // We want to play this block, add it to the frames buffer
                frames.reserve(frames.size() + block->GetFrameCount());
                for (int32_t i = 0; i < block->GetFrameCount(); i++)
                {
                    const mkvparser::Block::Frame data = block->GetFrame(i);
                    uint8_t* buf = new uint8_t[data.len];
                    data.Read(reader, buf);
                    frames.push_back(std::make_tuple(std::unique_ptr<uint8_t>(buf), static_cast<int32_t>(data.len)));
                }
                fStatus = fTrack->GetNext(fCurrentBlock, fCurrentBlock);
            }
            else
            {
                // We've got all frames that have to play... come back for more later!
                return true;
            }
        }

        return false; // No more blocks... We're done!
    }
};

// =====================================================

plMoviePlayer::plMoviePlayer() :
    fPlate(nullptr),
    fTexture(nullptr),
    fReader(nullptr),
    fMovieTime(0),
    fLastFrameTime(0),
    fPosition(hsPoint2()),
    fPlaying(false),
    fPaused(false),
    fOpusDecoder(nullptr)
{
    fScale.Set(1.0f, 1.0f);
}

plMoviePlayer::~plMoviePlayer()
{
    if (fPlate)
        // The plPlate owns the Mipmap Texture, so it destroys it for us
        plPlateManager::Instance().DestroyPlate(fPlate);
#ifdef VIDEO_AVAILABLE
    if (fOpusDecoder)
        opus_decoder_destroy(fOpusDecoder);
    if (fReader)
    {
        fReader->Close();
        delete fReader;
    }
#endif
}

bool plMoviePlayer::IOpenMovie()
{
#ifdef VIDEO_AVAILABLE
    if (!plFileInfo(fMoviePath).Exists())
    {
        hsAssert(false, "Tried to play a movie that doesn't exist");
        return false;
    }

    // open the movie with libwebm
    fReader = new mkvparser::MkvReader;
    SAFE_OP(fReader->Open(fMoviePath.AsString().c_str()), "open movie");

    // opens the segment
    // it contains everything you ever want to know about the movie
    long long pos = 0;
    mkvparser::EBMLHeader ebmlHeader;
    ebmlHeader.Parse(fReader, pos);
    mkvparser::Segment* seg;
    SAFE_OP(mkvparser::Segment::CreateInstance(fReader, pos, seg), "get segment info");
    SAFE_OP(seg->Load(), "load segment from webm");
    fSegment.reset(seg);

    // TODO: Figure out video and audio based on current language
    //       For now... just take the first one.
    const mkvparser::Tracks* tracks = fSegment->GetTracks();
    for (uint32_t i = 0; i < tracks->GetTracksCount(); ++i)
    {
        const mkvparser::Track* track = tracks->GetTrackByIndex(i);
        if (!track)
            continue;

        switch (track->GetType())
        {
        case mkvparser::Track::kAudio:
            {
                if (!fAudioTrack)
                    fAudioTrack.reset(new TrackMgr(track));
                break;
            }
        case mkvparser::Track::kVideo:
            {
                if (!fVideoTrack)
                    fVideoTrack.reset(new TrackMgr(track));
                break;
            }
        }
    }
    return true;
#else
    return false;
#endif
}

void plMoviePlayer::IProcessVideoFrame(const std::vector<blkbuf_t>& frames)
{
#ifdef VIDEO_AVAILABLE
    vpx_image_t* img = nullptr;

    // We have to decode all the frames, but we only want to display the most recent one to the user.
    for (auto it = frames.begin(); it != frames.end(); ++it)
    {
        const std::unique_ptr<uint8_t>& buf = std::get<0>(*it);
        int32_t size = std::get<1>(*it);
        img = fVpx->Decode(buf.get(), static_cast<uint32_t>(size));
    }

    if (img)
    {
        // According to VideoLAN[1], I420 is the most common image format in videos. I am inclined to believe this as our
        // attemps to convert the common Uru videos use I420 image data. So, as a shortcut, we will only implement that format.
        // If for some reason we need other formats, please, be my guest!
        // [1] = http://wiki.videolan.org/YUV#YUV_4:2:0_.28I420.2FJ420.2FYV12.29
        switch (img->fmt)
        {
        case VPX_IMG_FMT_I420:
            plPlanarImage::Yuv420ToRgba(img->d_w, img->d_h, img->stride, img->planes, reinterpret_cast<uint8_t*>(fTexture->GetImage()));
            break;

        DEFAULT_FATAL("image format");
        }

        // Flush new data to the device
        if (fTexture->GetDeviceRef())
            fTexture->GetDeviceRef()->SetDirty(true);
        fPlate->SetVisible(true);
    }
#endif
}

void plMoviePlayer::IProcessAudioFrame(const std::vector<blkbuf_t>& frames)
{
#ifdef VIDEO_AVAILABLE
    const uint8_t* data = nullptr;
    int32_t size = 0;
    for (auto it = frames.begin(); it != frames.end(); ++it)
    {
        const std::unique_ptr<uint8_t>& buf = std::get<0>(*it);
        data = buf.get();
        size = std::get<1>(*it);

        static const int frameSize = 5760; //max packet duration at 48kHz
        const mkvparser::AudioTrack* audio = static_cast<const mkvparser::AudioTrack*>(fAudioTrack->GetTrack());
        int16_t* pcm = new int16_t[frameSize * audio->GetChannels() * sizeof(int16_t)];
        int samples = opus_decode(fOpusDecoder, data, size, pcm, frameSize, 0);
        if (samples < 0)
            hsAssert(false, "opus error");
        fAudioSound->UpdateSoundBuffer(reinterpret_cast<uint8_t*>(pcm), samples * audio->GetChannels() * sizeof(int16_t));
    }
#endif
}

bool plMoviePlayer::Start()
{
    if (fPlaying)
        return false;

#ifdef VIDEO_AVAILABLE
    if (!IOpenMovie())
        return false;
    hsAssert(fVideoTrack, "nil video track -- expect bad things to happen!");

    // Initialize VPX
    if (VPX* vpx = VPX::Create())
        fVpx.reset(vpx);
    else
        return false;

    // Need to figure out scaling based on pipe size.
    plPlateManager& plateMgr = plPlateManager::Instance();
    const mkvparser::VideoTrack* video = static_cast<const mkvparser::VideoTrack*>(fVideoTrack->GetTrack());
    float width = (static_cast<float>(video->GetWidth()) / static_cast<float>(plateMgr.GetPipeWidth())) * fScale.fX;
    float height = (static_cast<float>(video->GetHeight()) / static_cast<float>(plateMgr.GetPipeHeight())) * fScale.fY;

    plateMgr.CreatePlate(&fPlate, fPosition.fX, fPosition.fY, width, height);
    fTexture = fPlate->CreateMaterial(static_cast<uint32_t>(video->GetWidth()), static_cast<uint32_t>(video->GetHeight()), false);

    //initialize opus
    const mkvparser::AudioTrack* audio = static_cast<const mkvparser::AudioTrack*>(fAudioTrack->GetTrack());
    plWAVHeader header;
    header.fFormatTag = plWAVHeader::kPCMFormatTag;
    header.fNumChannels = audio->GetChannels();
    header.fBitsPerSample = audio->GetBitDepth() == 8 ? 8 : 16;
    header.fNumSamplesPerSec = 48000; // OPUS specs say we shall always decode at 48kHz
    header.fBlockAlign = header.fNumChannels * header.fBitsPerSample / 8;
    header.fAvgBytesPerSec = header.fNumSamplesPerSec * header.fBlockAlign;
    fAudioSound.reset(new plWin32VideoSound(header));
    int error;
    fOpusDecoder = opus_decoder_create(48000, audio->GetChannels(), &error);
    if (error != OPUS_OK)
        hsAssert(false, "Error occured initalizing opus");

    fLastFrameTime = static_cast<int64_t>(hsTimer::GetMilliSeconds());
    fPlaying = true;

    return true;
#else
    return false;
#endif // VIDEO_AVAILABLE
}

bool plMoviePlayer::NextFrame()
{
    if (!fPlaying)
        return false;

    int64_t frameTime = static_cast<int64_t>(hsTimer::GetMilliSeconds());
    int64_t frameTimeDelta = frameTime - fLastFrameTime;
    fLastFrameTime = frameTime;

    if (fPaused)
        return true;

#ifdef VIDEO_AVAILABLE
    // Get our current timecode
    fMovieTime += frameTimeDelta;

    std::vector<blkbuf_t> audio;
    std::vector<blkbuf_t> video;
    uint8_t tracksWithData = 0;
    if (fAudioTrack)
    {
        if (fAudioTrack->GetFrames(fReader, fMovieTime, audio))
            tracksWithData++;
    }
    if (fVideoTrack)
    {
        if (fVideoTrack->GetFrames(fReader, fMovieTime, video))
            tracksWithData++;
    }
    if (!tracksWithData)
    {
        Stop();
        return false;
    }

    // Show our mess
    IProcessVideoFrame(video);
    IProcessAudioFrame(audio);

    return true;
#else
    return false;
#endif // VIDEO_AVAILABLE
}

bool plMoviePlayer::Pause(bool on)
{
    if (!fPlaying)
        return false;

    fPaused = on;
    return true;
}

bool plMoviePlayer::Stop()
{
    fPlaying = false;
    if (fAudioSound)
        fAudioSound->Stop();
    if (fPlate)
        fPlate->SetVisible(false);
    for (int i = 0; i < fCallbacks.size(); i++)
        fCallbacks[i]->Send();
    fCallbacks.clear();
    return true;
}