/*
 *      Copyright (C) 2013 Team XBMC
 *      http://xbmc.org
 *
 *  This Program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This Program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with XBMC; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */

// http://developer.android.com/reference/android/media/MediaCodec.html
//
// Android MediaCodec class can be used to access low-level media codec,
// i.e. encoder/decoder components. (android.media.MediaCodec). Requires
// SDK16+ which is 4.1 Jellybean and above.
//

#include "DVDVideoCodecAndroidMediaCodec.h"

#include "Application.h"
#include "ApplicationMessenger.h"
#include "DVDClock.h"
#include "threads/Atomics.h"
#include "utils/BitstreamConverter.h"
#include "utils/CPUInfo.h"
#include "utils/log.h"

#include "android/jni/ByteBuffer.h"
#include "android/jni/MediaCodec.h"
#include "android/jni/MediaCrypto.h"
#include "android/jni/MediaFormat.h"
#include "android/jni/MediaCodecList.h"
#include "android/jni/MediaCodecInfo.h"
#include "android/jni/Surface.h"
#include "android/jni/SurfaceTexture.h"
#include "android/activity/AndroidFeatures.h"

#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>

static bool CanSurfaceRenderWhiteList(const std::string &name)
{
  // All devices 'should' be capiable of surface rendering
  // but that seems to be hit or miss as most odd name devices
  // cannot surface render.
  static const char *cansurfacerender_decoders[] = {
    "OMX.Nvidia",
    "OMX.rk",
    "OMX.qcom",
    "OMX.Intel",
    "OMX.Exynos",
    NULL
  };
  for (const char **ptr = cansurfacerender_decoders; *ptr; ptr++)
  {
    if (!strnicmp(*ptr, name.c_str(), strlen(*ptr)))
      return true;
  }
  return false;
}

static bool IsBlacklisted(const std::string &name)
{
  static const char *blacklisted_decoders[] = {
    // No software decoders
    "OMX.google",
    // For Rockchip non-standard components
    "AVCDecoder",
    "AVCDecoder_FLASH",
    "FLVDecoder",
    "M2VDecoder",
    "M4vH263Decoder",
    "RVDecoder",
    "VC1Decoder",
    "VPXDecoder",
    // End of Rockchip
    NULL
  };
  for (const char **ptr = blacklisted_decoders; *ptr; ptr++)
  {
    if (!strnicmp(*ptr, name.c_str(), strlen(*ptr)))
      return true;
  }
  return false;
}

static bool IsSupportedColorFormat(int color_format)
{
  static const int supported_colorformats[] = {
    CJNIMediaCodecInfoCodecCapabilities::COLOR_FormatYUV420Planar,
    CJNIMediaCodecInfoCodecCapabilities::COLOR_TI_FormatYUV420PackedSemiPlanar,
    CJNIMediaCodecInfoCodecCapabilities::COLOR_FormatYUV420SemiPlanar,
    CJNIMediaCodecInfoCodecCapabilities::COLOR_QCOM_FormatYUV420SemiPlanar,
    CJNIMediaCodecInfoCodecCapabilities::OMX_QCOM_COLOR_FormatYVU420SemiPlanarInterlace,
    -1
  };
  for (const int *ptr = supported_colorformats; *ptr != -1; ptr++)
  {
    if (color_format == *ptr)
      return true;
  }
  return false;
}

/*****************************************************************************/
/*****************************************************************************/
class CNULL_Listener : public CJNISurfaceTextureOnFrameAvailableListener
{
public:
  CNULL_Listener() : CJNISurfaceTextureOnFrameAvailableListener(jni::jhobject(NULL)) {};

protected:
  virtual void OnFrameAvailable(CJNISurfaceTexture &surface) {};
};

class CDVDMediaCodecOnFrameAvailable : public CEvent, CJNISurfaceTextureOnFrameAvailableListener
{
public:
  CDVDMediaCodecOnFrameAvailable(boost::shared_ptr<CJNISurfaceTexture> &surfaceTexture)
  : m_surfaceTexture(surfaceTexture)
  {
    m_surfaceTexture->setOnFrameAvailableListener(*this);
  }

  virtual ~CDVDMediaCodecOnFrameAvailable()
  {
    // unhook the callback
    CNULL_Listener null_listener;
    m_surfaceTexture->setOnFrameAvailableListener(null_listener);
  }

protected:
  virtual void OnFrameAvailable(CJNISurfaceTexture &surface)
  {
    Set();
  }

private:
  boost::shared_ptr<CJNISurfaceTexture> m_surfaceTexture;

};

/*****************************************************************************/
/*****************************************************************************/
CDVDMediaCodecInfo::CDVDMediaCodecInfo(
    int index
  , unsigned int texture
  , boost::shared_ptr<CJNIMediaCodec> &codec
  , boost::shared_ptr<CJNISurfaceTexture> &surfacetexture
  , boost::shared_ptr<CDVDMediaCodecOnFrameAvailable> &frameready
)
: m_refs(1)
, m_valid(true)
, m_index(index)
, m_texture(texture)
, m_timestamp(0)
, m_codec(codec)
, m_surfacetexture(surfacetexture)
, m_frameready(frameready)
{
  // paranoid checks
  assert(m_index >= 0);
  assert(m_texture > 0);
  assert(m_codec != NULL);
  assert(m_surfacetexture != NULL);
  assert(m_frameready != NULL);
}

CDVDMediaCodecInfo::~CDVDMediaCodecInfo()
{
  assert(m_refs == 0);
}

CDVDMediaCodecInfo* CDVDMediaCodecInfo::Retain()
{
  AtomicIncrement(&m_refs);

  return this;
}

long CDVDMediaCodecInfo::Release()
{
  long count = AtomicDecrement(&m_refs);
  if (count == 0)
  {
    ReleaseOutputBuffer(false);
    delete this;
  }

  return count;
}

void CDVDMediaCodecInfo::Validate(bool state)
{
  CSingleLock lock(m_section);

  m_valid = state;
}

void CDVDMediaCodecInfo::ReleaseOutputBuffer(bool render)
{
  CSingleLock lock(m_section);

  if (!m_valid)
    return;

  // release OutputBuffer and render if indicated
  // then wait for rendered frame to become avaliable.

  if (render)
    m_frameready->Reset();

  m_codec->releaseOutputBuffer(m_index, render);

  if (xbmc_jnienv()->ExceptionOccurred())
  {
    CLog::Log(LOGERROR, "CDVDMediaCodecInfo::ReleaseOutputBuffer "
      "ExceptionOccurred render(%d)", render);
    xbmc_jnienv()->ExceptionDescribe();
    xbmc_jnienv()->ExceptionClear();
  }
}

int CDVDMediaCodecInfo::GetIndex() const
{
  CSingleLock lock(m_section);

  return m_index;
}

int CDVDMediaCodecInfo::GetTextureID() const
{
  // since m_texture never changes,
  // we do not need a m_section lock here.
  return m_texture;
}

void CDVDMediaCodecInfo::GetTransformMatrix(float *textureMatrix)
{
  CSingleLock lock(m_section);

  if (!m_valid)
    return;

  m_surfacetexture->getTransformMatrix(textureMatrix);
}

void CDVDMediaCodecInfo::UpdateTexImage()
{
  CSingleLock lock(m_section);

  if (!m_valid)
    return;

  // updateTexImage will check and spew any prior gl errors,
  // clear them before we call updateTexImage.
  glGetError();

  // this is key, after calling releaseOutputBuffer, we must
  // wait a little for MediaCodec to render to the surface.
  // Then we can updateTexImage without delay. If we do not
  // wait, then video playback gets jerky. To optomize this,
  // we hook the SurfaceTexture OnFrameAvailable callback
  // using CJNISurfaceTextureOnFrameAvailableListener and wait
  // on a CEvent to fire. 20ms seems to be a good max fallback.
  m_frameready->WaitMSec(20);

  m_surfacetexture->updateTexImage();
  if (xbmc_jnienv()->ExceptionOccurred())
  {
    CLog::Log(LOGERROR, "CDVDMediaCodecInfo::UpdateTexImage updateTexImage:ExceptionOccurred");
    xbmc_jnienv()->ExceptionDescribe();
    xbmc_jnienv()->ExceptionClear();
  }

  m_timestamp = m_surfacetexture->getTimestamp();
  if (xbmc_jnienv()->ExceptionOccurred())
  {
    CLog::Log(LOGERROR, "CDVDMediaCodecInfo::UpdateTexImage getTimestamp:ExceptionOccurred");
    xbmc_jnienv()->ExceptionDescribe();
    xbmc_jnienv()->ExceptionClear();
  }
}

/*****************************************************************************/
/*****************************************************************************/
CDVDVideoCodecAndroidMediaCodec::CDVDVideoCodecAndroidMediaCodec()
: m_formatname("mediacodec")
, m_opened(false)
, m_surface(NULL)
, m_textureId(0)
, m_bitstream(NULL)
, m_render_sw(false)
{
  memset(&m_videobuffer, 0x00, sizeof(DVDVideoPicture));
}

CDVDVideoCodecAndroidMediaCodec::~CDVDVideoCodecAndroidMediaCodec()
{
  Dispose();
}

bool CDVDVideoCodecAndroidMediaCodec::Open(CDVDStreamInfo &hints, CDVDCodecOptions &options)
{
  // check for 4.1 Jellybean and above.
  if (CAndroidFeatures::GetVersion() < 16)
    return false;

  m_drop = false;
  m_hints = hints;

  switch(m_hints.codec)
  {
    case AV_CODEC_ID_MPEG2VIDEO:
      m_mime = "video/mpeg2";
      m_formatname = "amc-mpeg2";
      break;
    case AV_CODEC_ID_MPEG4:
      m_mime = "video/mp4v-es";
      m_formatname = "amc-mpeg4";
      break;
    case AV_CODEC_ID_H263:
      m_mime = "video/3gpp";
      m_formatname = "amc-h263";
      break;
    case AV_CODEC_ID_VP3:
    case AV_CODEC_ID_VP6:
    case AV_CODEC_ID_VP6F:
    case AV_CODEC_ID_VP8:
      //m_mime = "video/x-vp6";
      //m_mime = "video/x-vp7";
      m_mime = "video/x-vnd.on2.vp8";
      m_formatname = "amc-vpX";
      break;
    case AV_CODEC_ID_AVS:
    case AV_CODEC_ID_CAVS:
    case AV_CODEC_ID_H264:
      m_mime = "video/avc";
      m_formatname = "amc-h264";
      // check for h264-avcC and convert to h264-annex-b
      if (m_hints.extradata && *(uint8_t*)m_hints.extradata == 1)
      {
        m_bitstream = new CBitstreamConverter;
        if (!m_bitstream->Open(m_hints.codec, (uint8_t*)m_hints.extradata, m_hints.extrasize, true))
        {
          SAFE_DELETE(m_bitstream);
          return false;
        }
      }
      break;
    case AV_CODEC_ID_VC1:
    case AV_CODEC_ID_WMV3:
      m_mime = "video/wvc1";
      //m_mime = "video/wmv9";
      m_formatname = "amc-vc1";
      break;
    default:
      CLog::Log(LOGDEBUG, "CDVDVideoCodecAndroidMediaCodec:: Unknown hints.codec(%d)", hints.codec);
      return false;
      break;
  }

  // CJNIMediaCodec::createDecoderByXXX doesn't handle errors nicely,
  // it crashes if the codec isn't found. This is fixed in latest AOSP,
  // but not in current 4.1 devices. So 1st search for a matching codec, then create it.
  bool hasSupportedColorFormat = false;
  int num_codecs = CJNIMediaCodecList::getCodecCount();
  for (int i = 0; i < num_codecs; i++)
  {
    CJNIMediaCodecInfo codec_info = CJNIMediaCodecList::getCodecInfoAt(i);
    if (codec_info.isEncoder())
      continue;
    m_codecname = codec_info.getName();
    if (IsBlacklisted(m_codecname))
      continue;

    std::vector<std::string> types = codec_info.getSupportedTypes();
    // return the 1st one we find, that one is typically 'the best'
    for (size_t j = 0; j < types.size(); ++j)
    {
      if (types[j] == m_mime)
      {
        m_codec = boost::shared_ptr<CJNIMediaCodec>(new CJNIMediaCodec(CJNIMediaCodec::createByCodecName(m_codecname)));

        CJNIMediaCodecInfoCodecCapabilities codec_caps = codec_info.getCapabilitiesForType(m_mime);
        std::vector<int> color_formats = codec_caps.colorFormats();

        // clear any jni exceptions, jni gets upset if we do not.
        if (xbmc_jnienv()->ExceptionOccurred())
        {
          CLog::Log(LOGERROR, "CDVDVideoCodecAndroidMediaCodec::Open ExceptionOccurred");
          xbmc_jnienv()->ExceptionClear();
          m_codec.reset();
          continue;
        }
        hasSupportedColorFormat = false;
        for (size_t k = 0; k < color_formats.size(); ++k)
        {
          CLog::Log(LOGDEBUG, "CDVDVideoCodecAndroidMediaCodec::Open "
            "m_codecname(%s), colorFormat(%d)", m_codecname.c_str(), color_formats[k]);
          if (IsSupportedColorFormat(color_formats[k]))
            hasSupportedColorFormat = true;
        }
        break;
      }
    }
    if (m_codec)
      break;
  }
  if (!m_codec)
  {
    CLog::Log(LOGERROR, "CDVDVideoCodecAndroidMediaCodec:: Failed to create Android MediaCodec");
    SAFE_DELETE(m_bitstream);
    return false;
  }

  // whitelist of devices that can surface render.
  m_render_sw = !CanSurfaceRenderWhiteList(m_codecname);
  if (m_render_sw)
  {
    if (!hasSupportedColorFormat)
    {
      CLog::Log(LOGERROR, "CDVDVideoCodecAndroidMediaCodec:: No supported color format");
      m_codec.reset();
      SAFE_DELETE(m_bitstream);
      return false;
    }
  }

  if (!ConfigureMediaCodec())
  {
    m_codec.reset();
    SAFE_DELETE(m_bitstream);
    return false;
  }

  // setup a YUV420P DVDVideoPicture buffer.
  // first make sure all properties are reset.
  memset(&m_videobuffer, 0x00, sizeof(DVDVideoPicture));

  m_videobuffer.dts = DVD_NOPTS_VALUE;
  m_videobuffer.pts = DVD_NOPTS_VALUE;
  m_videobuffer.color_range  = 0;
  m_videobuffer.color_matrix = 4;
  m_videobuffer.iFlags  = DVP_FLAG_ALLOCATED;
  m_videobuffer.iWidth  = m_hints.width;
  m_videobuffer.iHeight = m_hints.height;
  // these will get reset to crop values later
  m_videobuffer.iDisplayWidth  = m_hints.width;
  m_videobuffer.iDisplayHeight = m_hints.height;

  CLog::Log(LOGINFO, "CDVDVideoCodecAndroidMediaCodec:: "
    "Open Android MediaCodec %s", m_codecname.c_str());

  m_opened = true;

  return m_opened;
}

void CDVDVideoCodecAndroidMediaCodec::Dispose()
{
  m_opened = false;

  // release any retained demux packets
  while (!m_demux.empty())
  {
    amc_demux &demux_pkt = m_demux.front();
    free(demux_pkt.pData);
    m_demux.pop();
  }

  // invalidate any inflight outputbuffers, make sure
  // m_output is empty so we do not create new ones
  m_input.clear();
  m_output.clear();
  FlushInternal();

  // clear m_videobuffer bits
  if (m_render_sw)
  {
    free(m_videobuffer.data[0]), m_videobuffer.data[0] = NULL;
    free(m_videobuffer.data[1]), m_videobuffer.data[1] = NULL;
    free(m_videobuffer.data[2]), m_videobuffer.data[2] = NULL;
  }
  m_videobuffer.iFlags = 0;
  // m_videobuffer.mediacodec is unioned with m_videobuffer.data[0]
  // so be very careful when and how you touch it.
  m_videobuffer.mediacodec = NULL;

  if (m_codec)
  {
    m_codec->stop();
    m_codec->release();
    m_codec.reset();
  }
  ReleaseSurfaceTexture();

  SAFE_DELETE(m_bitstream);
}

int CDVDVideoCodecAndroidMediaCodec::Decode(uint8_t *pData, int iSize, double dts, double pts)
{
  // Handle input, add demuxer packet to input queue, we must accept it or
  // it will be discarded as DVDPlayerVideo has no concept of "try again".
  // we must return VC_BUFFER or VC_PICTURE, default to VC_BUFFER.
  int rtn = VC_BUFFER;

  if (!m_opened)
    return rtn;

  if (m_hints.ptsinvalid)
    pts = DVD_NOPTS_VALUE;

  // must check for an output picture 1st,
  // otherwise, mediacodec can stall on some devices.
  if (GetOutputPicture() > 0)
    rtn |= VC_PICTURE;

  if (pData)
  {
    if (m_bitstream)
    {
      m_bitstream->Convert(pData, iSize);
      iSize = m_bitstream->GetConvertSize();
      pData = m_bitstream->GetConvertBuffer();
    }

    // queue demux pkt in case we cannot get an input buffer
    amc_demux demux_pkt;
    demux_pkt.dts = dts;
    demux_pkt.pts = pts;
    demux_pkt.iSize = iSize;
    demux_pkt.pData = (uint8_t*)malloc(iSize);
    memcpy(demux_pkt.pData, pData, iSize);
    m_demux.push(demux_pkt);

    // try to fetch an input buffer
    int64_t timeout_us = 5000;
    int index = m_codec->dequeueInputBuffer(timeout_us);
    if (index >= 0)
    {
      // docs lie, getInputBuffers should be good after
      // m_codec->start() but the internal refs are not
      // setup until much later on some devices.
      if (m_input.empty())
        m_input = m_codec->getInputBuffers();

      // we have an input buffer, fill it.
      int size = m_input[index].capacity();
      // fetch the front demux packet
      amc_demux &demux_pkt = m_demux.front();
      if (demux_pkt.iSize > size)
      {
        CLog::Log(LOGERROR, "CDVDVideoCodecAndroidMediaCodec::Decode, iSize(%d) > size(%d)", iSize, size);
        demux_pkt.iSize = size;
      }
      // fetch a pointer to the ByteBuffer backing store
      void *dst_ptr = xbmc_jnienv()->GetDirectBufferAddress(m_input[index].get_raw());
      if (dst_ptr)
        memcpy(dst_ptr, demux_pkt.pData, demux_pkt.iSize);

      free(demux_pkt.pData);
      m_demux.pop();

      // Translate from dvdplayer dts/pts to MediaCodec pts,
      // pts WILL get re-ordered by MediaCodec if needed.
      // Do not try to pass pts as a unioned double/int64_t,
      // some android devices will diddle with presentationTimeUs
      // and you will get NaN back and DVDPlayerVideo will barf.
      int64_t presentationTimeUs = AV_NOPTS_VALUE;
      if (demux_pkt.pts != DVD_NOPTS_VALUE)
        presentationTimeUs = demux_pkt.pts;
      else if (demux_pkt.dts != DVD_NOPTS_VALUE)
        presentationTimeUs = demux_pkt.dts;
/*
      CLog::Log(LOGDEBUG, "CDVDVideoCodecAndroidMediaCodec:: "
        "pts(%f), ipts(%lld), iSize(%d), GetDataSize(%d), loop_cnt(%d)",
        presentationTimeUs, pts_dtoi(presentationTimeUs), iSize, GetDataSize(), loop_cnt);
*/
      int flags = 0;
      int offset = 0;
      m_codec->queueInputBuffer(index, offset, demux_pkt.iSize, presentationTimeUs, flags);
      // clear any jni exceptions, jni gets upset if we do not.
      if (xbmc_jnienv()->ExceptionOccurred())
      {
        CLog::Log(LOGERROR, "CDVDVideoCodecAndroidMediaCodec::Decode ExceptionOccurred");
        xbmc_jnienv()->ExceptionClear();
      }
    }
  }

  return rtn;
}

void CDVDVideoCodecAndroidMediaCodec::Reset()
{
  if (!m_opened)
    return;

  // dump any pending demux packets
  while (!m_demux.empty())
  {
    amc_demux &demux_pkt = m_demux.front();
    free(demux_pkt.pData);
    m_demux.pop();
  }

  if (m_codec)
  {
    // flush all outputbuffers inflight, they will
    // become invalid on m_codec->flush and generate
    // a spew of java exceptions if used
    FlushInternal();

    // now we can flush the actual MediaCodec object
    m_codec->flush();
    if (xbmc_jnienv()->ExceptionOccurred())
    {
      CLog::Log(LOGERROR, "CDVDVideoCodecAndroidMediaCodec::Reset ExceptionOccurred");
      xbmc_jnienv()->ExceptionClear();
    }

    // Invalidate our local DVDVideoPicture bits
    m_videobuffer.pts = DVD_NOPTS_VALUE;
    if (!m_render_sw)
      m_videobuffer.mediacodec = NULL;
  }
}

bool CDVDVideoCodecAndroidMediaCodec::GetPicture(DVDVideoPicture* pDvdVideoPicture)
{
  if (!m_opened)
    return false;

  *pDvdVideoPicture = m_videobuffer;

  // Invalidate our local DVDVideoPicture bits
  m_videobuffer.pts = DVD_NOPTS_VALUE;
  if (!m_render_sw)
    m_videobuffer.mediacodec = NULL;

  return true;
}

bool CDVDVideoCodecAndroidMediaCodec::ClearPicture(DVDVideoPicture* pDvdVideoPicture)
{
  if (pDvdVideoPicture->format == RENDER_FMT_MEDIACODEC)
    SAFE_RELEASE(pDvdVideoPicture->mediacodec);
  memset(pDvdVideoPicture, 0x00, sizeof(DVDVideoPicture));

  return true;
}

void CDVDVideoCodecAndroidMediaCodec::SetDropState(bool bDrop)
{
  m_drop = bDrop;
  if (m_drop)
    m_videobuffer.iFlags |=  DVP_FLAG_DROPPED;
  else
    m_videobuffer.iFlags &= ~DVP_FLAG_DROPPED;
}

int CDVDVideoCodecAndroidMediaCodec::GetDataSize(void)
{
  // just ignore internal buffering contribution.
  return 0;
}

double CDVDVideoCodecAndroidMediaCodec::GetTimeSize(void)
{
  // just ignore internal buffering contribution.
  return 0.0;
}

unsigned CDVDVideoCodecAndroidMediaCodec::GetAllowedReferences()
{
  return 3;
}

void CDVDVideoCodecAndroidMediaCodec::FlushInternal()
{
  // invalidate any existing inflight buffers and create
  // new ones to match the number of output buffers

  if (m_render_sw)
    return;

  for (size_t i = 0; i < m_inflight.size(); i++)
    m_inflight[i]->Validate(false);
  m_inflight.clear();

  for (size_t i = 0; i < m_output.size(); i++)
  {
    m_inflight.push_back(
      new CDVDMediaCodecInfo(i, m_textureId, m_codec, m_surfaceTexture, m_frameAvailable)
    );
  }
}

bool CDVDVideoCodecAndroidMediaCodec::ConfigureMediaCodec(void)
{
  // setup a MediaFormat to match the video content,
  // used by codec during configure
  CJNIMediaFormat mediaformat = CJNIMediaFormat::createVideoFormat(
    m_mime.c_str(), m_hints.width, m_hints.height);
  // some android devices forget to default the demux input max size
  mediaformat.setInteger(CJNIMediaFormat::KEY_MAX_INPUT_SIZE, 0);

  // handle codec extradata
  if (m_hints.extrasize)
  {
    size_t size = m_hints.extrasize;
    void  *src_ptr = m_hints.extradata;
    if (m_bitstream)
    {
      size = m_bitstream->GetExtraSize();
      src_ptr = m_bitstream->GetExtraData();
    }
    // Allocate a byte buffer via allocateDirect in java instead of NewDirectByteBuffer,
    // since the latter doesn't allocate storage of its own, and we don't know how long
    // the codec uses the buffer.
    CJNIByteBuffer bytebuffer = CJNIByteBuffer::allocateDirect(size);
    void *dts_ptr = xbmc_jnienv()->GetDirectBufferAddress(bytebuffer.get_raw());
    memcpy(dts_ptr, src_ptr, size);
    // codec will automatically handle buffers as extradata
    // using entries with keys "csd-0", "csd-1", etc.
    mediaformat.setByteBuffer("csd-0", bytebuffer);
  }

  InitSurfaceTexture();

  // configure and start the codec.
  // use the MediaFormat that we have setup.
  // use a null MediaCrypto, our content is not encrypted.
  // use a null Surface, we will extract the video picture data manually.
  int flags = 0;
  CJNIMediaCrypto crypto(jni::jhobject(NULL));
  // our jni gets upset if we do this a different
  // way, do not mess with it.
  if (m_render_sw)
  {
    CJNISurface surface(jni::jhobject(NULL));
    m_codec->configure(mediaformat, surface, crypto, flags);
  }
  else
  {
    m_codec->configure(mediaformat, *m_surface, crypto, flags);
  }
  // always, check/clear jni exceptions.
  if (xbmc_jnienv()->ExceptionOccurred())
  {
    xbmc_jnienv()->ExceptionClear();
    return false;
  }


  m_codec->start();
  // always, check/clear jni exceptions.
  if (xbmc_jnienv()->ExceptionOccurred())
  {
    xbmc_jnienv()->ExceptionClear();
    return false;
  }

  return true;
}

int CDVDVideoCodecAndroidMediaCodec::GetOutputPicture(void)
{
  int rtn = 0;

  int64_t timeout_us = 5000;
  CJNIMediaCodecBufferInfo bufferInfo;
  int index = m_codec->dequeueOutputBuffer(bufferInfo, timeout_us);
  if (index >= 0)
  {
    if (m_drop)
    {
      m_codec->releaseOutputBuffer(index, false);
      if (xbmc_jnienv()->ExceptionOccurred())
        xbmc_jnienv()->ExceptionClear();
      return 0;
    }

    // some devices will return a valid index
    // before signaling INFO_OUTPUT_BUFFERS_CHANGED which
    // is used to setup m_output, D'uh. setup m_output here.
    if (m_output.empty())
    {
      m_output = m_codec->getOutputBuffers();
      FlushInternal();
    }

    int flags = bufferInfo.flags();
    if (flags & CJNIMediaCodec::BUFFER_FLAG_SYNC_FRAME)
      CLog::Log(LOGDEBUG, "CDVDVideoCodecAndroidMediaCodec:: BUFFER_FLAG_SYNC_FRAME");

    if (flags & CJNIMediaCodec::BUFFER_FLAG_CODEC_CONFIG)
      CLog::Log(LOGDEBUG, "CDVDVideoCodecAndroidMediaCodec:: BUFFER_FLAG_CODEC_CONFIG");

    if (flags & CJNIMediaCodec::BUFFER_FLAG_END_OF_STREAM)
    {
      CLog::Log(LOGDEBUG, "CDVDVideoCodecAndroidMediaCodec:: BUFFER_FLAG_END_OF_STREAM");
      m_codec->releaseOutputBuffer(index, false);
      if (xbmc_jnienv()->ExceptionOccurred())
        xbmc_jnienv()->ExceptionClear();
      return 0;
    }

    if (!m_render_sw)
    {
      m_videobuffer.mediacodec = m_inflight[index]->Retain();
      m_videobuffer.mediacodec->Validate(true);
    }
    else
    {
      int size = bufferInfo.size();
      int offset = bufferInfo.offset();

      if (!m_output[index].isDirect())
        CLog::Log(LOGWARNING, "CDVDVideoCodecAndroidMediaCodec:: m_output[index].isDirect == false");

      if (size && m_output[index].capacity())
      {
        uint8_t *src_ptr = (uint8_t*)xbmc_jnienv()->GetDirectBufferAddress(m_output[index].get_raw());
        src_ptr += offset;

        int loop_end = 0;
        if (m_videobuffer.format == RENDER_FMT_NV12)
          loop_end = 2;
        else if (m_videobuffer.format == RENDER_FMT_YUV420P)
          loop_end = 3;

        for (int i = 0; i < loop_end; i++)
        {
          uint8_t *src   = src_ptr + m_src_offset[i];
          int src_stride = m_src_stride[i];
          uint8_t *dst   = m_videobuffer.data[i];
          int dst_stride = m_videobuffer.iLineSize[i];

          int height = m_videobuffer.iHeight;
          if (i > 0)
            height = (m_videobuffer.iHeight + 1) / 2;

          if (src_stride == dst_stride)
            memcpy(dst, src, dst_stride * height);
          else
            for (int j = 0; j < height; j++, src += src_stride, dst += dst_stride)
              memcpy(dst, src, dst_stride);
        }
      }
      m_codec->releaseOutputBuffer(index, false);
    }

    int64_t pts= bufferInfo.presentationTimeUs();
    m_videobuffer.dts = DVD_NOPTS_VALUE;
    m_videobuffer.pts = DVD_NOPTS_VALUE;
    if (pts != AV_NOPTS_VALUE)
      m_videobuffer.pts = pts;

/*
    CLog::Log(LOGDEBUG, "CDVDVideoCodecAndroidMediaCodec::GetOutputPicture "
      "index(%d), pts(%f)", index, m_videobuffer.pts);
*/
    // always, check/clear jni exceptions.
    if (xbmc_jnienv()->ExceptionOccurred())
      xbmc_jnienv()->ExceptionClear();

    rtn = 1;
  }
  else if (index == CJNIMediaCodec::INFO_OUTPUT_BUFFERS_CHANGED)
  {
    m_output = m_codec->getOutputBuffers();
    FlushInternal();
  }
  else if (index == CJNIMediaCodec::INFO_OUTPUT_FORMAT_CHANGED)
  {
    OutputFormatChanged();
  }
  else if (index == CJNIMediaCodec::INFO_TRY_AGAIN_LATER)
  {
    // normal dequeueOutputBuffer timeout, ignore it.
    rtn = -1;
  }
  else
  {
    // we should never get here
    CLog::Log(LOGERROR, "CDVDVideoCodecAndroidMediaCodec::GetOutputPicture unknown index(%d)", index);
  }

  return rtn;
}

void CDVDVideoCodecAndroidMediaCodec::OutputFormatChanged(void)
{
  CJNIMediaFormat mediaformat = m_codec->getOutputFormat();

  int width       = mediaformat.getInteger("width");
  int height      = mediaformat.getInteger("height");
  int stride      = mediaformat.getInteger("stride");
  int slice_height= mediaformat.getInteger("slice-height");
  int color_format= mediaformat.getInteger("color-format");
  int crop_left   = mediaformat.getInteger("crop-left");
  int crop_top    = mediaformat.getInteger("crop-top");
  int crop_right  = mediaformat.getInteger("crop-right");
  int crop_bottom = mediaformat.getInteger("crop-bottom");

  CLog::Log(LOGDEBUG, "CDVDVideoCodecAndroidMediaCodec:: "
    "width(%d), height(%d), stride(%d), slice-height(%d), color-format(%d)",
    width, height, stride, slice_height, color_format);
  CLog::Log(LOGDEBUG, "CDVDVideoCodecAndroidMediaCodec:: "
    "crop-left(%d), crop-top(%d), crop-right(%d), crop-bottom(%d)",
    crop_left, crop_top, crop_right, crop_bottom);

  if (!m_render_sw)
  {
    CLog::Log(LOGDEBUG, "CDVDVideoCodecAndroidMediaCodec:: Direct Surface Rendering");
    m_videobuffer.format = RENDER_FMT_MEDIACODEC;
  }
  else
  {
    // Android device quirks and fixes

    // Samsung Quirk: ignore width/height/stride/slice: http://code.google.com/p/android/issues/detail?id=37768#c3
    if (strstr(m_codecname.c_str(), "OMX.SEC.avc.dec") != NULL || strstr(m_codecname.c_str(), "OMX.SEC.avcdec") != NULL)
    {
      width = stride = m_hints.width;
      height = slice_height = m_hints.height;
    }
    if (stride <= width)
        stride = width;
    if (slice_height <= height)
    {
      slice_height = height;
      if (color_format == CJNIMediaCodecInfoCodecCapabilities::COLOR_FormatYUV420Planar)
      {
        // NVidia Tegra 3 on Nexus 7 does not set slice_heights
        if (strstr(m_codecname.c_str(), "OMX.Nvidia.") != NULL)
        {
          slice_height = (((height) + 15) & ~15);
          CLog::Log(LOGDEBUG, "CDVDVideoCodecAndroidMediaCodec:: NVidia Tegra 3 quirk, slice_height(%d)", slice_height);
        }
      }
    }
    if (color_format == CJNIMediaCodecInfoCodecCapabilities::COLOR_TI_FormatYUV420PackedSemiPlanar)
    {
      slice_height -= crop_top / 2;
      // set crop top/left here, since the offset parameter already includes this.
      // if we would ignore the offset parameter in the BufferInfo, we could just keep
      // the original slice height and apply the top/left cropping instead.
      crop_top = 0;
      crop_left = 0;
    }

    // default picture format to none
    for (int i = 0; i < 4; i++)
      m_src_offset[i] = m_src_stride[i] = 0;
    // delete any existing buffers
    for (int i = 0; i < 4; i++)
      free(m_videobuffer.data[i]);

    // setup picture format and data offset vectors
    if (color_format == CJNIMediaCodecInfoCodecCapabilities::COLOR_FormatYUV420Planar)
    {
      CLog::Log(LOGDEBUG, "CDVDVideoCodecAndroidMediaCodec:: COLOR_FormatYUV420Planar");

      // Y plane
      m_src_stride[0] = stride;
      m_src_offset[0] = crop_top * stride;
      m_src_offset[0]+= crop_left;

      // U plane
      m_src_stride[1] = (stride + 1) / 2;
      //  skip over the Y plane
      m_src_offset[1] = slice_height * stride;
      //  crop_top/crop_left divided by two
      //  because one byte of the U/V planes
      //  corresponds to two pixels horizontally/vertically
      m_src_offset[1]+= crop_top  / 2 * m_src_stride[1];
      m_src_offset[1]+= crop_left / 2;

      // V plane
      m_src_stride[2] = (stride + 1) / 2;
      //  skip over the Y plane
      m_src_offset[2] = slice_height * stride;
      //  skip over the U plane
      m_src_offset[2]+= ((slice_height + 1) / 2) * ((stride + 1) / 2);
      //  crop_top/crop_left divided by two
      //  because one byte of the U/V planes
      //  corresponds to two pixels horizontally/vertically
      m_src_offset[2]+= crop_top  / 2 * m_src_stride[2];
      m_src_offset[2]+= crop_left / 2;

      m_videobuffer.iLineSize[0] =  width;         // Y
      m_videobuffer.iLineSize[1] = (width + 1) /2; // U
      m_videobuffer.iLineSize[2] = (width + 1) /2; // V
      m_videobuffer.iLineSize[3] = 0;

      unsigned int iPixels = width * height;
      unsigned int iChromaPixels = iPixels/4;
      m_videobuffer.data[0] = (uint8_t*)malloc(16 + iPixels);
      m_videobuffer.data[1] = (uint8_t*)malloc(16 + iChromaPixels);
      m_videobuffer.data[2] = (uint8_t*)malloc(16 + iChromaPixels);
      m_videobuffer.data[3] = NULL;
      m_videobuffer.format  = RENDER_FMT_YUV420P;
    }
    else if (color_format == CJNIMediaCodecInfoCodecCapabilities::COLOR_FormatYUV420SemiPlanar
          || color_format == CJNIMediaCodecInfoCodecCapabilities::COLOR_QCOM_FormatYUV420SemiPlanar
          || color_format == CJNIMediaCodecInfoCodecCapabilities::COLOR_TI_FormatYUV420PackedSemiPlanar
          || color_format == CJNIMediaCodecInfoCodecCapabilities::OMX_QCOM_COLOR_FormatYVU420SemiPlanarInterlace)

    {
      CLog::Log(LOGDEBUG, "CDVDVideoCodecAndroidMediaCodec:: COLOR_FormatYUV420SemiPlanar");

      // Y plane
      m_src_stride[0] = stride;
      m_src_offset[0] = crop_top * stride;
      m_src_offset[0]+= crop_left;

      // UV plane
      m_src_stride[1] = stride;
      //  skip over the Y plane
      m_src_offset[1] = slice_height * stride;
      m_src_offset[1]+= crop_top * stride;
      m_src_offset[1]+= crop_left;

      m_videobuffer.iLineSize[0] = width;  // Y
      m_videobuffer.iLineSize[1] = width;  // UV
      m_videobuffer.iLineSize[2] = 0;
      m_videobuffer.iLineSize[3] = 0;

      unsigned int iPixels = width * height;
      unsigned int iChromaPixels = iPixels;
      m_videobuffer.data[0] = (uint8_t*)malloc(16 + iPixels);
      m_videobuffer.data[1] = (uint8_t*)malloc(16 + iChromaPixels);
      m_videobuffer.data[2] = NULL;
      m_videobuffer.data[3] = NULL;
      m_videobuffer.format  = RENDER_FMT_NV12;
    }
    else
    {
      CLog::Log(LOGERROR, "CDVDVideoCodecAndroidMediaCodec:: Fixme unknown color_format(%d)", color_format);
      return;
    }
  }

  // picture display width/height include the cropping.
  m_videobuffer.iDisplayWidth  = crop_right  + 1 - crop_left;
  m_videobuffer.iDisplayHeight = crop_bottom + 1 - crop_top;

  // clear any jni exceptions
  if (xbmc_jnienv()->ExceptionOccurred())
    xbmc_jnienv()->ExceptionClear();
}

void CDVDVideoCodecAndroidMediaCodec::CallbackInitSurfaceTexture(void *userdata)
{
  CDVDVideoCodecAndroidMediaCodec *ctx = static_cast<CDVDVideoCodecAndroidMediaCodec*>(userdata);
  ctx->InitSurfaceTexture();
}

void CDVDVideoCodecAndroidMediaCodec::InitSurfaceTexture(void)
{
  if (m_render_sw)
    return;

  // We MUST create the GLES texture on the main thread
  // to match where the valid GLES context is located.
  // It would be nice to move this out of here, we would need
  // to create/fetch/create from g_RenderMananger. But g_RenderMananger
  // does not know we are using MediaCodec until Configure and we
  // we need m_surfaceTexture valid before then. Chicken, meet Egg.
  if (g_application.IsCurrentThread())
  {
    // localize GLuint so we do not spew gles includes in our header
    GLuint texture_id;

    glGenTextures(1, &texture_id);
    glBindTexture(  GL_TEXTURE_EXTERNAL_OES, texture_id);
    glTexParameterf(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameterf(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameterf(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameterf(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glBindTexture(  GL_TEXTURE_EXTERNAL_OES, 0);
    m_textureId = texture_id;

    m_surfaceTexture = boost::shared_ptr<CJNISurfaceTexture>(new CJNISurfaceTexture(m_textureId));
    // hook the surfaceTexture OnFrameAvailable callback
    m_frameAvailable = boost::shared_ptr<CDVDMediaCodecOnFrameAvailable>(new CDVDMediaCodecOnFrameAvailable(m_surfaceTexture));
    m_surface = new CJNISurface(*m_surfaceTexture);
  }
  else
  {
    ThreadMessageCallback callbackData;
    callbackData.callback = &CallbackInitSurfaceTexture;
    callbackData.userptr  = (void*)this;

    ThreadMessage msg;
    msg.dwMessage = TMSG_CALLBACK;
    msg.lpVoid = (void*)&callbackData;

    // wait for it.
    CApplicationMessenger::Get().SendMessage(msg, true);
  }

  return;
}

void CDVDVideoCodecAndroidMediaCodec::ReleaseSurfaceTexture(void)
{
  if (m_render_sw)
    return;

  // it is safe to delete here even though these items
  // were created in the main thread instance
  SAFE_DELETE(m_surface);
  m_frameAvailable.reset();
  m_surfaceTexture.reset();

  if (m_textureId > 0)
  {
    GLuint texture_id = m_textureId;
    glDeleteTextures(1, &texture_id);
    m_textureId = 0;
  }
}
