/src/FreeRDP/libfreerdp/codec/h264.c

Source
/**
 * FreeRDP: A Remote Desktop Protocol Implementation
 * H.264 Bitmap Compression
 *
 * Copyright 2014 Mike McDonald <Mike.McDonald@software.dell.com>
 * Copyright 2017 David Fort <contact@hardening-consulting.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <freerdp/config.h>

#include <winpr/crt.h>
#include <winpr/print.h>
#include <winpr/library.h>
#include <winpr/bitstream.h>
#include <winpr/synch.h>

#include <freerdp/primitives.h>
#include <freerdp/codec/h264.h>
#include <freerdp/codec/yuv.h>
#include <freerdp/log.h>

#include "h264.h"

#define TAG FREERDP_TAG("codec")

static BOOL avc444_ensure_buffer(H264_CONTEXT* h264, DWORD nDstHeight);

static BOOL yuv_ensure_buffer(H264_CONTEXT* h264, UINT32 stride, UINT32 width, UINT32 height)
{
  BOOL isNull = FALSE;
  UINT32 pheight = height;

  if (!h264)
    return FALSE;

  if (stride == 0)
    stride = width;

  if (stride % 16 != 0)
    stride += 16 - stride % 16;

  if (pheight % 16 != 0)
    pheight += 16 - pheight % 16;

  const size_t nPlanes = h264->hwAccel ? 2 : 3;

  for (size_t x = 0; x < nPlanes; x++)
  {
    if (!h264->pYUVData[x] || !h264->pOldYUVData[x])
      isNull = TRUE;
  }

  if (pheight == 0)
    return FALSE;
  if (stride == 0)
    return FALSE;

  if (isNull || (width != h264->width) || (height != h264->height) ||
      (stride != h264->iStride[0]))
  {
    if (h264->hwAccel) /* NV12 */
    {
      h264->iStride[0] = stride;
      h264->iStride[1] = stride;
      h264->iStride[2] = 0;
    }
    else /* I420 */
    {
      h264->iStride[0] = stride;
      h264->iStride[1] = (stride + 1) / 2;
      h264->iStride[2] = (stride + 1) / 2;
    }

    h264->width = width;
    h264->height = height;

    for (size_t x = 0; x < nPlanes; x++)
    {
      BYTE* tmp1 = winpr_aligned_recalloc(h264->pYUVData[x], h264->iStride[x], pheight, 16);
      BYTE* tmp2 =
          winpr_aligned_recalloc(h264->pOldYUVData[x], h264->iStride[x], pheight, 16);
      if (tmp1)
        h264->pYUVData[x] = tmp1;
      if (tmp2)
        h264->pOldYUVData[x] = tmp2;
      if (!tmp1 || !tmp2)
        return FALSE;
    }
  }

  return TRUE;
}

BOOL avc420_ensure_buffer(H264_CONTEXT* h264, UINT32 stride, UINT32 width, UINT32 height)
{
  return yuv_ensure_buffer(h264, stride, width, height);
}

static BOOL isRectValid(UINT32 width, UINT32 height, const RECTANGLE_16* rect)
{
  WINPR_ASSERT(rect);
  if (rect->left > width)
    return FALSE;
  if (rect->right > width)
    return FALSE;
  if (rect->left >= rect->right)
    return FALSE;
  if (rect->top > height)
    return FALSE;
  if (rect->bottom > height)
    return FALSE;
  if (rect->top >= rect->bottom)
    return FALSE;
  return TRUE;
}

static BOOL areRectsValid(UINT32 width, UINT32 height, const RECTANGLE_16* rects, UINT32 count)
{
  WINPR_ASSERT(rects || (count == 0));
  for (size_t x = 0; x < count; x++)
  {
    const RECTANGLE_16* rect = &rects[x];
    if (!isRectValid(width, height, rect))
      return FALSE;
  }
  return TRUE;
}

INT32 avc420_decompress(H264_CONTEXT* h264, const BYTE* pSrcData, UINT32 SrcSize, BYTE* pDstData,
                        DWORD DstFormat, UINT32 nDstStep, WINPR_ATTR_UNUSED UINT32 nDstWidth,
                        WINPR_ATTR_UNUSED UINT32 nDstHeight, const RECTANGLE_16* regionRects,
                        UINT32 numRegionRects)
{
  int status = 0;
  const BYTE* pYUVData[3];

  if (!h264 || h264->Compressor)
    return -1001;

  if (!areRectsValid(nDstWidth, nDstHeight, regionRects, numRegionRects))
    return -1013;

  status = h264->subsystem->Decompress(h264, pSrcData, SrcSize);

  if (status == 0)
    return 1;

  if (status < 0)
    return status;

  pYUVData[0] = h264->pYUVData[0];
  pYUVData[1] = h264->pYUVData[1];
  pYUVData[2] = h264->pYUVData[2];
  if (!yuv420_context_decode(h264->yuv, pYUVData, h264->iStride, h264->height, DstFormat,
                             pDstData, nDstStep, regionRects, numRegionRects))
    return -1002;

  return 1;
}

static BOOL allocate_h264_metablock(UINT32 QP, RECTANGLE_16* rectangles,
                                    RDPGFX_H264_METABLOCK* meta, size_t count)
{
  /* [MS-RDPEGFX] 2.2.4.4.2 RDPGFX_AVC420_QUANT_QUALITY */
  if (!meta || (QP > UINT8_MAX))
  {
    free(rectangles);
    return FALSE;
  }

  meta->regionRects = rectangles;
  if (count == 0)
    return TRUE;

  if (count > UINT32_MAX)
    return FALSE;

  meta->quantQualityVals = calloc(count, sizeof(RDPGFX_H264_QUANT_QUALITY));

  if (!meta->quantQualityVals || !meta->regionRects)
    return FALSE;
  meta->numRegionRects = (UINT32)count;
  for (size_t x = 0; x < count; x++)
  {
    RDPGFX_H264_QUANT_QUALITY* cur = &meta->quantQualityVals[x];
    cur->qp = (UINT8)QP;

    /* qpVal bit 6 and 7 are flags, so mask them out here.
     * qualityVal is [0-100] so 100 - qpVal [0-64] is always in range */
    cur->qualityVal = 100 - (QP & 0x3F);
  }
  return TRUE;
}

static inline BOOL diff_tile(const RECTANGLE_16* regionRect, BYTE* pYUVData[3],
                             BYTE* pOldYUVData[3], UINT32 const iStride[3])
{
  size_t size = 0;

  if (!regionRect || !pYUVData || !pOldYUVData || !iStride)
    return FALSE;
  size = regionRect->right - regionRect->left;
  if (regionRect->right > iStride[0])
    return FALSE;
  if (regionRect->right / 2u > iStride[1])
    return FALSE;
  if (regionRect->right / 2u > iStride[2])
    return FALSE;

  for (size_t y = regionRect->top; y < regionRect->bottom; y++)
  {
    const BYTE* cur0 = &pYUVData[0][y * iStride[0]];
    const BYTE* cur1 = &pYUVData[1][y * iStride[1]];
    const BYTE* cur2 = &pYUVData[2][y * iStride[2]];
    const BYTE* old0 = &pOldYUVData[0][y * iStride[0]];
    const BYTE* old1 = &pOldYUVData[1][y * iStride[1]];
    const BYTE* old2 = &pOldYUVData[2][y * iStride[2]];

    if (memcmp(&cur0[regionRect->left], &old0[regionRect->left], size) != 0)
      return TRUE;
    if (memcmp(&cur1[regionRect->left / 2], &old1[regionRect->left / 2], size / 2) != 0)
      return TRUE;
    if (memcmp(&cur2[regionRect->left / 2], &old2[regionRect->left / 2], size / 2) != 0)
      return TRUE;
  }
  return FALSE;
}

static BOOL detect_changes(BOOL firstFrameDone, const UINT32 QP, const RECTANGLE_16* regionRect,
                           BYTE* pYUVData[3], BYTE* pOldYUVData[3], UINT32 const iStride[3],
                           RDPGFX_H264_METABLOCK* meta)
{
  size_t count = 0;
  size_t wc = 0;
  size_t hc = 0;
  RECTANGLE_16* rectangles = nullptr;

  if (!regionRect || !pYUVData || !pOldYUVData || !iStride || !meta)
    return FALSE;

  wc = (regionRect->right - regionRect->left) / 64 + 1;
  hc = (regionRect->bottom - regionRect->top) / 64 + 1;
  rectangles = calloc(wc * hc, sizeof(RECTANGLE_16));
  if (!rectangles)
    return FALSE;
  if (!firstFrameDone)
  {
    rectangles[0] = *regionRect;
    count = 1;
  }
  else
  {
    for (size_t y = regionRect->top; y < regionRect->bottom; y += 64)
    {
      for (size_t x = regionRect->left; x < regionRect->right; x += 64)
      {
        RECTANGLE_16 rect;
        rect.left = (UINT16)MIN(UINT16_MAX, regionRect->left + x);
        rect.top = (UINT16)MIN(UINT16_MAX, regionRect->top + y);
        rect.right =
            (UINT16)MIN(UINT16_MAX, MIN(regionRect->left + x + 64, regionRect->right));
        rect.bottom =
            (UINT16)MIN(UINT16_MAX, MIN(regionRect->top + y + 64, regionRect->bottom));
        if (diff_tile(&rect, pYUVData, pOldYUVData, iStride))
          rectangles[count++] = rect;
      }
    }
  }
  if (!allocate_h264_metablock(QP, rectangles, meta, count))
    return FALSE;
  return TRUE;
}

INT32 h264_get_yuv_buffer(H264_CONTEXT* h264, UINT32 nSrcStride, UINT32 nSrcWidth,
                          UINT32 nSrcHeight, BYTE* YUVData[3], UINT32 stride[3])
{
  if (!h264 || !h264->Compressor || !h264->subsystem || !h264->subsystem->Compress)
    return -1;

  if (!yuv_ensure_buffer(h264, nSrcStride, nSrcWidth, nSrcHeight))
    return -1;

  for (size_t x = 0; x < 3; x++)
  {
    YUVData[x] = h264->pYUVData[x];
    stride[x] = h264->iStride[x];
  }

  return 0;
}

INT32 h264_compress(H264_CONTEXT* h264, BYTE** ppDstData, UINT32* pDstSize)
{
  if (!h264 || !h264->Compressor || !h264->subsystem || !h264->subsystem->Compress)
    return -1;

  const BYTE* pcYUVData[3] = { h264->pYUVData[0], h264->pYUVData[1], h264->pYUVData[2] };

  return h264->subsystem->Compress(h264, pcYUVData, h264->iStride, ppDstData, pDstSize);
}

INT32 avc420_compress(H264_CONTEXT* h264, const BYTE* pSrcData, DWORD SrcFormat, UINT32 nSrcStep,
                      UINT32 nSrcWidth, UINT32 nSrcHeight, const RECTANGLE_16* regionRect,
                      BYTE** ppDstData, UINT32* pDstSize, RDPGFX_H264_METABLOCK* meta)
{
  INT32 rc = -1;
  BYTE* pYUVData[3] = WINPR_C_ARRAY_INIT;
  const BYTE* pcYUVData[3] = WINPR_C_ARRAY_INIT;
  BYTE* pOldYUVData[3] = WINPR_C_ARRAY_INIT;

  if (!h264 || !regionRect || !meta || !h264->Compressor)
    return -1;

  if (!h264->subsystem->Compress)
    return -1;

  if (!avc420_ensure_buffer(h264, nSrcStep, nSrcWidth, nSrcHeight))
    return -1;

  if (h264->encodingBuffer)
  {
    for (size_t x = 0; x < 3; x++)
    {
      pYUVData[x] = h264->pYUVData[x];
      pOldYUVData[x] = h264->pOldYUVData[x];
    }
  }
  else
  {
    for (size_t x = 0; x < 3; x++)
    {
      pYUVData[x] = h264->pOldYUVData[x];
      pOldYUVData[x] = h264->pYUVData[x];
    }
  }
  h264->encodingBuffer = !h264->encodingBuffer;

  if (!yuv420_context_encode(h264->yuv, pSrcData, nSrcStep, SrcFormat, h264->iStride, pYUVData,
                             regionRect, 1))
    goto fail;

  if (!detect_changes(h264->firstLumaFrameDone, h264->QP, regionRect, pYUVData, pOldYUVData,
                      h264->iStride, meta))
    goto fail;

  if (meta->numRegionRects == 0)
  {
    rc = 0;
    goto fail;
  }

  for (size_t x = 0; x < 3; x++)
    pcYUVData[x] = pYUVData[x];

  rc = h264->subsystem->Compress(h264, pcYUVData, h264->iStride, ppDstData, pDstSize);
  if (rc >= 0)
    h264->firstLumaFrameDone = TRUE;

fail:
  if (rc < 0)
    free_h264_metablock(meta);
  return rc;
}

INT32 avc444_compress(H264_CONTEXT* h264, const BYTE* pSrcData, DWORD SrcFormat, UINT32 nSrcStep,
                      UINT32 nSrcWidth, UINT32 nSrcHeight, BYTE version, const RECTANGLE_16* region,
                      BYTE* op, BYTE** ppDstData, UINT32* pDstSize, BYTE** ppAuxDstData,
                      UINT32* pAuxDstSize, RDPGFX_H264_METABLOCK* meta,
                      RDPGFX_H264_METABLOCK* auxMeta)
{
  int rc = -1;
  BYTE* coded = nullptr;
  UINT32 codedSize = 0;
  BYTE** pYUV444Data = nullptr;
  BYTE** pOldYUV444Data = nullptr;
  BYTE** pYUVData = nullptr;
  BYTE** pOldYUVData = nullptr;

  if (!h264 || !h264->Compressor)
    return -1;

  if (!h264->subsystem->Compress)
    return -1;

  if (!avc420_ensure_buffer(h264, nSrcStep, nSrcWidth, nSrcHeight))
    return -1;

  if (!avc444_ensure_buffer(h264, nSrcHeight))
    return -1;

  if (h264->encodingBuffer)
  {
    pYUV444Data = h264->pOldYUV444Data;
    pOldYUV444Data = h264->pYUV444Data;
    pYUVData = h264->pOldYUVData;
    pOldYUVData = h264->pYUVData;
  }
  else
  {
    pYUV444Data = h264->pYUV444Data;
    pOldYUV444Data = h264->pOldYUV444Data;
    pYUVData = h264->pYUVData;
    pOldYUVData = h264->pOldYUVData;
  }
  h264->encodingBuffer = !h264->encodingBuffer;

  if (!yuv444_context_encode(h264->yuv, version, pSrcData, nSrcStep, SrcFormat, h264->iStride,
                             pYUV444Data, pYUVData, region, 1))
    goto fail;

  if (!detect_changes(h264->firstLumaFrameDone, h264->QP, region, pYUV444Data, pOldYUV444Data,
                      h264->iStride, meta))
    goto fail;
  if (!detect_changes(h264->firstChromaFrameDone, h264->QP, region, pYUVData, pOldYUVData,
                      h264->iStride, auxMeta))
    goto fail;

  /* [MS-RDPEGFX] 2.2.4.5 RFX_AVC444_BITMAP_STREAM
   * LC:
   * 0 ... Luma & Chroma
   * 1 ... Luma
   * 2 ... Chroma
   */
  if ((meta->numRegionRects > 0) && (auxMeta->numRegionRects > 0))
    *op = 0;
  else if (meta->numRegionRects > 0)
    *op = 1;
  else if (auxMeta->numRegionRects > 0)
    *op = 2;
  else
  {
    WLog_INFO(TAG, "no changes detected for luma or chroma frame");
    rc = 0;
    goto fail;
  }

  if ((*op == 0) || (*op == 1))
  {
    const BYTE* pcYUV444Data[3] = { pYUV444Data[0], pYUV444Data[1], pYUV444Data[2] };

    if (h264->subsystem->Compress(h264, pcYUV444Data, h264->iStride, &coded, &codedSize) < 0)
      goto fail;
    h264->firstLumaFrameDone = TRUE;
    memcpy(h264->lumaData, coded, codedSize);
    *ppDstData = h264->lumaData;
    *pDstSize = codedSize;
  }

  if ((*op == 0) || (*op == 2))
  {
    const BYTE* pcYUVData[3] = { pYUVData[0], pYUVData[1], pYUVData[2] };

    if (h264->subsystem->Compress(h264, pcYUVData, h264->iStride, &coded, &codedSize) < 0)
      goto fail;
    h264->firstChromaFrameDone = TRUE;
    *ppAuxDstData = coded;
    *pAuxDstSize = codedSize;
  }

  rc = 1;
fail:
  if (rc < 0)
  {
    free_h264_metablock(meta);
    free_h264_metablock(auxMeta);
  }
  return rc;
}

static BOOL avc444_ensure_buffer(H264_CONTEXT* h264, DWORD nDstHeight)
{
  WINPR_ASSERT(h264);

  const UINT32* piMainStride = h264->iStride;
  UINT32* piDstSize = h264->iYUV444Size;
  UINT32* piDstStride = h264->iYUV444Stride;
  BYTE** ppYUVDstData = h264->pYUV444Data;
  BYTE** ppOldYUVDstData = h264->pOldYUV444Data;

  nDstHeight = MAX(h264->height, nDstHeight);
  const UINT32 pad = nDstHeight % 16;
  UINT32 padDstHeight = nDstHeight; /* Need alignment to 16x16 blocks */

  if (pad != 0)
    padDstHeight += 16 - pad;

  if ((piMainStride[0] != piDstStride[0]) ||
      (piDstSize[0] != 1ull * piMainStride[0] * padDstHeight))
  {
    for (UINT32 x = 0; x < 3; x++)
    {
      piDstStride[x] = piMainStride[0];
      piDstSize[x] = piDstStride[x] * padDstHeight;

      if (piDstSize[x] == 0)
        return FALSE;

      BYTE* tmp1 = winpr_aligned_recalloc(ppYUVDstData[x], piDstSize[x], 1, 16);
      if (!tmp1)
        return FALSE;
      ppYUVDstData[x] = tmp1;
      BYTE* tmp2 = winpr_aligned_recalloc(ppOldYUVDstData[x], piDstSize[x], 1, 16);
      if (!tmp2)
        return FALSE;
      ppOldYUVDstData[x] = tmp2;
    }

    {
      BYTE* tmp = winpr_aligned_recalloc(h264->lumaData, piDstSize[0], 4, 16);
      if (!tmp)
        goto fail;
      h264->lumaData = tmp;
    }
  }

  for (UINT32 x = 0; x < 3; x++)
  {
    if (!ppOldYUVDstData[x] || !ppYUVDstData[x] || (piDstSize[x] == 0) || (piDstStride[x] == 0))
    {
      WLog_Print(h264->log, WLOG_ERROR,
                 "YUV buffer not initialized! check your decoder settings");
      goto fail;
    }
  }

  if (!h264->lumaData)
    goto fail;

  return TRUE;
fail:
  return FALSE;
}

static BOOL avc444_process_rects(H264_CONTEXT* h264, const BYTE* pSrcData, UINT32 SrcSize,
                                 BYTE* pDstData, UINT32 DstFormat, UINT32 nDstStep,
                                 WINPR_ATTR_UNUSED UINT32 nDstWidth, UINT32 nDstHeight,
                                 const RECTANGLE_16* rects, UINT32 nrRects, avc444_frame_type type)
{
  const BYTE* pYUVData[3];
  BYTE* pYUVDstData[3];
  UINT32* piDstStride = h264->iYUV444Stride;
  BYTE** ppYUVDstData = h264->pYUV444Data;
  const UINT32* piStride = h264->iStride;

  if (h264->subsystem->Decompress(h264, pSrcData, SrcSize) < 0)
    return FALSE;

  pYUVData[0] = h264->pYUVData[0];
  pYUVData[1] = h264->pYUVData[1];
  pYUVData[2] = h264->pYUVData[2];
  if (!avc444_ensure_buffer(h264, nDstHeight))
    return FALSE;

  pYUVDstData[0] = ppYUVDstData[0];
  pYUVDstData[1] = ppYUVDstData[1];
  pYUVDstData[2] = ppYUVDstData[2];
  return (yuv444_context_decode(h264->yuv, (BYTE)type, pYUVData, piStride, h264->height,
                                pYUVDstData, piDstStride, DstFormat, pDstData, nDstStep, rects,
                                nrRects));
}

#if defined(AVC444_FRAME_STAT)
static UINT64 op1 = 0;
static double op1sum = 0;
static UINT64 op2 = 0;
static double op2sum = 0;
static UINT64 op3 = 0;
static double op3sum = 0;
static double avg(UINT64* count, double old, double size)
{
  double tmp = size + *count * old;
  (*count)++;
  tmp = tmp / *count;
  return tmp;
}
#endif

INT32 avc444_decompress(H264_CONTEXT* h264, BYTE op, const RECTANGLE_16* regionRects,
                        UINT32 numRegionRects, const BYTE* pSrcData, UINT32 SrcSize,
                        const RECTANGLE_16* auxRegionRects, UINT32 numAuxRegionRect,
                        const BYTE* pAuxSrcData, UINT32 AuxSrcSize, BYTE* pDstData, DWORD DstFormat,
                        UINT32 nDstStep, UINT32 nDstWidth, UINT32 nDstHeight, UINT32 codecId)
{
  INT32 status = -1;
  avc444_frame_type chroma =
      (codecId == RDPGFX_CODECID_AVC444) ? AVC444_CHROMAv1 : AVC444_CHROMAv2;

  if (!h264 || !regionRects || !pSrcData || !pDstData || h264->Compressor)
    return -1001;

  if (!areRectsValid(nDstWidth, nDstHeight, regionRects, numRegionRects))
    return -1013;
  if (!areRectsValid(nDstWidth, nDstHeight, auxRegionRects, numAuxRegionRect))
    return -1014;

  switch (op)
  {
    case 0: /* YUV420 in stream 1
             * Chroma420 in stream 2 */
      if (!avc444_process_rects(h264, pSrcData, SrcSize, pDstData, DstFormat, nDstStep,
                                nDstWidth, nDstHeight, regionRects, numRegionRects,
                                AVC444_LUMA))
        status = -1;
      else if (!avc444_process_rects(h264, pAuxSrcData, AuxSrcSize, pDstData, DstFormat,
                                     nDstStep, nDstWidth, nDstHeight, auxRegionRects,
                                     numAuxRegionRect, chroma))
        status = -1;
      else
        status = 0;

      break;

    case 2: /* Chroma420 in stream 1 */
      if (!avc444_process_rects(h264, pSrcData, SrcSize, pDstData, DstFormat, nDstStep,
                                nDstWidth, nDstHeight, regionRects, numRegionRects, chroma))
        status = -1;
      else
        status = 0;

      break;

    case 1: /* YUV420 in stream 1 */
      if (!avc444_process_rects(h264, pSrcData, SrcSize, pDstData, DstFormat, nDstStep,
                                nDstWidth, nDstHeight, regionRects, numRegionRects,
                                AVC444_LUMA))
        status = -1;
      else
        status = 0;

      break;

    default: /* WTF? */
      break;
  }

#if defined(AVC444_FRAME_STAT)

  switch (op)
  {
    case 0:
      op1sum = avg(&op1, op1sum, SrcSize + AuxSrcSize);
      break;

    case 1:
      op2sum = avg(&op2, op2sum, SrcSize);
      break;

    case 2:
      op3sum = avg(&op3, op3sum, SrcSize);
      break;

    default:
      break;
  }

  WLog_Print(h264->log, WLOG_INFO,
             "luma=%" PRIu64 " [avg=%lf] chroma=%" PRIu64 " [avg=%lf] combined=%" PRIu64
             " [avg=%lf]",
             op1, op1sum, op2, op2sum, op3, op3sum);
#endif
  return status;
}

#define MAX_SUBSYSTEMS 10
static INIT_ONCE subsystems_once = INIT_ONCE_STATIC_INIT;
static const H264_CONTEXT_SUBSYSTEM* subSystems[MAX_SUBSYSTEMS] = WINPR_C_ARRAY_INIT;

static BOOL CALLBACK h264_register_subsystems(WINPR_ATTR_UNUSED PINIT_ONCE once,
                                              WINPR_ATTR_UNUSED PVOID param,
                                              WINPR_ATTR_UNUSED PVOID* context)
{
  int i = 0;

#ifdef WITH_MEDIACODEC
  {
    subSystems[i] = &g_Subsystem_mediacodec;
    i++;
  }
#endif
#if defined(_WIN32) && defined(WITH_MEDIA_FOUNDATION)
  {
    subSystems[i] = &g_Subsystem_MF;
    i++;
  }
#endif
#ifdef WITH_OPENH264
  {
    subSystems[i] = &g_Subsystem_OpenH264;
    i++;
  }
#endif
#ifdef WITH_VIDEO_FFMPEG
  {
    subSystems[i] = &g_Subsystem_libavcodec;
    i++;
  }
#endif
  return i > 0;
}

static BOOL h264_context_init(H264_CONTEXT* h264)
{
  if (!h264)
    return FALSE;

  h264->subsystem = nullptr;
  if (!InitOnceExecuteOnce(&subsystems_once, h264_register_subsystems, nullptr, nullptr))
    return FALSE;

  for (size_t i = 0; i < MAX_SUBSYSTEMS; i++)
  {
    const H264_CONTEXT_SUBSYSTEM* subsystem = subSystems[i];

    if (!subsystem || !subsystem->Init)
      break;

    if (subsystem->Init(h264))
    {
      h264->subsystem = subsystem;
      return TRUE;
    }
  }

  return FALSE;
}

BOOL h264_context_reset(H264_CONTEXT* h264, UINT32 width, UINT32 height)
{
  if (!h264)
    return FALSE;

  h264->width = width;
  h264->height = height;

  if (h264->subsystem && h264->subsystem->Uninit)
    h264->subsystem->Uninit(h264);
  if (!h264_context_init(h264))
    return FALSE;

  return yuv_context_reset(h264->yuv, width, height);
}

H264_CONTEXT* h264_context_new(BOOL Compressor)
{
  H264_CONTEXT* h264 = (H264_CONTEXT*)calloc(1, sizeof(H264_CONTEXT));
  if (!h264)
    return nullptr;

  h264->log = WLog_Get(TAG);

  if (!h264->log)
    goto fail;

  h264->Compressor = Compressor;
  if (Compressor)
  {
    /* Default compressor settings, may be changed by caller */
    h264->BitRate = 1000000;
    h264->FrameRate = 30;
  }

  if (!h264_context_init(h264))
    goto fail;

  h264->yuv = yuv_context_new(Compressor, 0);
  if (!h264->yuv)
    goto fail;

  return h264;

fail:
  WINPR_PRAGMA_DIAG_PUSH
  WINPR_PRAGMA_DIAG_IGNORED_MISMATCHED_DEALLOC
  h264_context_free(h264);
  WINPR_PRAGMA_DIAG_POP
  return nullptr;
}

void h264_context_free(H264_CONTEXT* h264)
{
  if (h264)
  {
    if (h264->subsystem)
    {
      WINPR_ASSERT(h264->subsystem->Uninit);
      h264->subsystem->Uninit(h264);
    }

    for (size_t x = 0; x < 3; x++)
    {
      if (h264->Compressor)
      {
        winpr_aligned_free(h264->pYUVData[x]);
        winpr_aligned_free(h264->pOldYUVData[x]);
      }
      winpr_aligned_free(h264->pYUV444Data[x]);
      winpr_aligned_free(h264->pOldYUV444Data[x]);
    }
    winpr_aligned_free(h264->lumaData);

    yuv_context_free(h264->yuv);
    free(h264);
  }
}

void free_h264_metablock(RDPGFX_H264_METABLOCK* meta)
{
  RDPGFX_H264_METABLOCK m = WINPR_C_ARRAY_INIT;
  if (!meta)
    return;
  free(meta->quantQualityVals);
  free(meta->regionRects);
  *meta = m;
}

BOOL h264_context_set_option(H264_CONTEXT* h264, H264_CONTEXT_OPTION option, UINT32 value)
{
  WINPR_ASSERT(h264);
  switch (option)
  {
    case H264_CONTEXT_OPTION_BITRATE:
      h264->BitRate = value;
      return TRUE;
    case H264_CONTEXT_OPTION_FRAMERATE:
      h264->FrameRate = value;
      return TRUE;
    case H264_CONTEXT_OPTION_RATECONTROL:
    {
      switch (value)
      {
        case H264_RATECONTROL_VBR:
          h264->RateControlMode = H264_RATECONTROL_VBR;
          return TRUE;
        case H264_RATECONTROL_CQP:
          h264->RateControlMode = H264_RATECONTROL_CQP;
          return TRUE;
        default:
          WLog_Print(h264->log, WLOG_WARN,
                     "Unknown H264_CONTEXT_OPTION_RATECONTROL value [0x%08" PRIx32 "]",
                     value);
          return FALSE;
      }
      return TRUE;
    }
    case H264_CONTEXT_OPTION_QP:
      h264->QP = value;
      return TRUE;
    case H264_CONTEXT_OPTION_USAGETYPE:
      h264->UsageType = value;
      return TRUE;
    case H264_CONTEXT_OPTION_HW_ACCEL:
      h264->hwAccel = (value);
      return TRUE;
    default:
      WLog_Print(h264->log, WLOG_WARN, "Unknown H264_CONTEXT_OPTION[0x%08" PRIx32 "]",
                 option);
      return FALSE;
  }
}

UINT32 h264_context_get_option(H264_CONTEXT* h264, H264_CONTEXT_OPTION option)
{
  WINPR_ASSERT(h264);
  switch (option)
  {
    case H264_CONTEXT_OPTION_BITRATE:
      return h264->BitRate;
    case H264_CONTEXT_OPTION_FRAMERATE:
      return h264->FrameRate;
    case H264_CONTEXT_OPTION_RATECONTROL:
      return h264->RateControlMode;
    case H264_CONTEXT_OPTION_QP:
      return h264->QP;
    case H264_CONTEXT_OPTION_USAGETYPE:
      return h264->UsageType;
    case H264_CONTEXT_OPTION_HW_ACCEL:
      return h264->hwAccel;
    default:
      WLog_Print(h264->log, WLOG_WARN, "Unknown H264_CONTEXT_OPTION[0x%08" PRIx32 "]",
                 option);
      return 0;
  }
}

Coverage Report

Created: 2026-03-04 06:17