/src/FreeRDP/channels/rdpgfx/client/rdpgfx_codec.c

Source
/**
 * FreeRDP: A Remote Desktop Protocol Implementation
 * Graphics Pipeline Extension
 *
 * Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.com>
 * Copyright 2015 Thincast Technologies GmbH
 * Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.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/stream.h>
#include <freerdp/log.h>
#include <freerdp/utils/profiler.h>

#include "rdpgfx_common.h"

#include "rdpgfx_codec.h"

/**
 * Function description
 *
 * @return 0 on success, otherwise a Win32 error code
 */
static UINT rdpgfx_read_h264_metablock(WINPR_ATTR_UNUSED RDPGFX_PLUGIN* gfx, wStream* s,
                                       RDPGFX_H264_METABLOCK* meta)
{
  RECTANGLE_16* regionRect = nullptr;
  RDPGFX_H264_QUANT_QUALITY* quantQualityVal = nullptr;
  UINT error = ERROR_INVALID_DATA;
  meta->regionRects = nullptr;
  meta->quantQualityVals = nullptr;

  if (!Stream_CheckAndLogRequiredLengthWLog(gfx->base.log, s, 4))
    goto error_out;

  Stream_Read_UINT32(s, meta->numRegionRects); /* numRegionRects (4 bytes) */

  if (!Stream_CheckAndLogRequiredLengthOfSizeWLog(gfx->base.log, s, meta->numRegionRects, 8ull))
    goto error_out;

  meta->regionRects = (RECTANGLE_16*)calloc(meta->numRegionRects, sizeof(RECTANGLE_16));

  if (!meta->regionRects)
  {
    WLog_Print(gfx->base.log, WLOG_ERROR, "malloc failed!");
    error = CHANNEL_RC_NO_MEMORY;
    goto error_out;
  }

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

  if (!meta->quantQualityVals)
  {
    WLog_Print(gfx->base.log, WLOG_ERROR, "malloc failed!");
    error = CHANNEL_RC_NO_MEMORY;
    goto error_out;
  }

  WLog_Print(gfx->base.log, WLOG_TRACE, "H264_METABLOCK: numRegionRects: %" PRIu32 "",
             meta->numRegionRects);

  for (UINT32 index = 0; index < meta->numRegionRects; index++)
  {
    regionRect = &(meta->regionRects[index]);

    if ((error = rdpgfx_read_rect16(gfx->base.log, s, regionRect)))
    {
      WLog_Print(gfx->base.log, WLOG_ERROR,
                 "rdpgfx_read_rect16 failed with error %" PRIu32 "!", error);
      goto error_out;
    }

    WLog_Print(gfx->base.log, WLOG_TRACE,
               "regionRects[%" PRIu32 "]: left: %" PRIu16 " top: %" PRIu16 " right: %" PRIu16
               " bottom: %" PRIu16 "",
               index, regionRect->left, regionRect->top, regionRect->right, regionRect->bottom);
  }

  if (!Stream_CheckAndLogRequiredLengthOfSizeWLog(gfx->base.log, s, meta->numRegionRects, 2ull))
  {
    error = ERROR_INVALID_DATA;
    goto error_out;
  }

  for (UINT32 index = 0; index < meta->numRegionRects; index++)
  {
    quantQualityVal = &(meta->quantQualityVals[index]);
    Stream_Read_UINT8(s, quantQualityVal->qpVal);      /* qpVal (1 byte) */
    Stream_Read_UINT8(s, quantQualityVal->qualityVal); /* qualityVal (1 byte) */
    quantQualityVal->qp = quantQualityVal->qpVal & 0x3F;
    quantQualityVal->r = (quantQualityVal->qpVal >> 6) & 1;
    quantQualityVal->p = (quantQualityVal->qpVal >> 7) & 1;
    WLog_Print(gfx->base.log, WLOG_TRACE,
               "quantQualityVals[%" PRIu32 "]: qp: %" PRIu8 " r: %" PRIu8 " p: %" PRIu8
               " qualityVal: %" PRIu8 "",
               index, quantQualityVal->qp, quantQualityVal->r, quantQualityVal->p,
               quantQualityVal->qualityVal);
  }

  return CHANNEL_RC_OK;
error_out:
  free_h264_metablock(meta);
  return error;
}

WINPR_ATTR_NODISCARD
static BOOL checkSurfaceCommand(const RDPGFX_PLUGIN* gfx, const RDPGFX_SURFACE_COMMAND* cmd)
{
  switch (cmd->codecId)
  {
    case RDPGFX_CODECID_UNCOMPRESSED:
    case RDPGFX_CODECID_CAVIDEO:
    case RDPGFX_CODECID_CLEARCODEC:
    case RDPGFX_CODECID_PLANAR:
    case RDPGFX_CODECID_AVC420:
    case RDPGFX_CODECID_ALPHA:
    case RDPGFX_CODECID_AVC444:
    case RDPGFX_CODECID_AVC444v2:
    case RDPGFX_CODECID_CAPROGRESSIVE:
    case RDPGFX_CODECID_CAPROGRESSIVE_V2:
      return TRUE;
#if defined(WITH_GFX_AV1)
    case RDPGFX_CODECID_AV1:
      if (gfx->ConnectionCaps.version != RDPGFX_CAPVERSION_FRDP_1)
      {
        WLog_Print(gfx->base.log, WLOG_ERROR,
                   "RDPGFX_SURFACE_COMMAND::codecId %" PRIu32
                   " only supported with %s but connection uses %s [0x%08" PRIx32 "]",
                   cmd->codecId, rdpgfx_caps_version_str(RDPGFX_CAPVERSION_FRDP_1),
                   rdpgfx_caps_version_str(gfx->ConnectionCaps.version),
                   gfx->ConnectionCaps.version);
        return FALSE;
      }
      return TRUE;
#endif
    default:
      WLog_Print(gfx->base.log, WLOG_ERROR,
                 "Unknown RDPGFX_SURFACE_COMMAND::codecId %" PRIu32, cmd->codecId);
      return FALSE;
  }
}

static UINT logSurfaceCommand(RDPGFX_PLUGIN* gfx, const RDPGFX_SURFACE_COMMAND* cmd)
{
  WINPR_ASSERT(gfx);

  WLog_Print(gfx->base.log, WLOG_DEBUG, "Got GFX %s",
             rdpgfx_get_codec_id_string(WINPR_ASSERTING_INT_CAST(UINT16, cmd->codecId)));

  RdpgfxClientContext* context = gfx->context;
  if (!context)
    return CHANNEL_RC_OK;

  if (!checkSurfaceCommand(gfx, cmd))
    return CHANNEL_RC_NULL_DATA;

  const UINT error = IFCALLRESULT(CHANNEL_RC_OK, context->SurfaceCommand, context, cmd);

  if (error)
    WLog_Print(gfx->base.log, WLOG_ERROR,
               "context->SurfaceCommand failed with error %" PRIu32 "", error);
  return error;
}

/**
 * Function description
 *
 * @return 0 on success, otherwise a Win32 error code
 */
static UINT rdpgfx_decode_AVC420(RDPGFX_PLUGIN* gfx, RDPGFX_SURFACE_COMMAND* cmd)
{
  RDPGFX_AVC420_BITMAP_STREAM h264 = WINPR_C_ARRAY_INIT;
  wStream* s = Stream_New(cmd->data, cmd->length);

  if (!s)
  {
    WLog_Print(gfx->base.log, WLOG_ERROR, "Stream_New failed!");
    return CHANNEL_RC_NO_MEMORY;
  }

  UINT error = rdpgfx_read_h264_metablock(gfx, s, &(h264.meta));
  if (error != CHANNEL_RC_OK)
  {
    Stream_Free(s, FALSE);
    WLog_Print(gfx->base.log, WLOG_ERROR,
               "rdpgfx_read_h264_metablock failed with error %" PRIu32 "!", error);
    return error;
  }

  h264.data = Stream_Pointer(s);
  h264.length = (UINT32)Stream_GetRemainingLength(s);
  Stream_Free(s, FALSE);
  cmd->extra = (void*)&h264;

  error = logSurfaceCommand(gfx, cmd);

  free_h264_metablock(&h264.meta);
  cmd->extra = nullptr;
  return error;
}

/**
 * Function description
 *
 * @return 0 on success, otherwise a Win32 error code
 */
static UINT rdpgfx_decode_AVC444(RDPGFX_PLUGIN* gfx, RDPGFX_SURFACE_COMMAND* cmd)
{
  UINT error = CHANNEL_RC_OK;
  UINT32 tmp = 0;
  size_t pos1 = 0;
  size_t pos2 = 0;

  RDPGFX_AVC444_BITMAP_STREAM h264 = WINPR_C_ARRAY_INIT;
  wStream* s = Stream_New(cmd->data, cmd->length);

  if (!s)
  {
    WLog_Print(gfx->base.log, WLOG_ERROR, "Stream_New failed!");
    return CHANNEL_RC_NO_MEMORY;
  }

  if (!Stream_CheckAndLogRequiredLengthWLog(gfx->base.log, s, 4))
  {
    error = ERROR_INVALID_DATA;
    goto fail;
  }

  Stream_Read_UINT32(s, tmp);
  h264.cbAvc420EncodedBitstream1 = tmp & 0x3FFFFFFFUL;
  h264.LC = (tmp >> 30UL) & 0x03UL;

  if (h264.LC == 0x03)
  {
    error = ERROR_INVALID_DATA;
    goto fail;
  }

  pos1 = Stream_GetPosition(s);

  if ((error = rdpgfx_read_h264_metablock(gfx, s, &(h264.bitstream[0].meta))))
  {
    WLog_Print(gfx->base.log, WLOG_ERROR,
               "rdpgfx_read_h264_metablock failed with error %" PRIu32 "!", error);
    goto fail;
  }

  pos2 = Stream_GetPosition(s);
  h264.bitstream[0].data = Stream_Pointer(s);

  if (h264.LC == 0)
  {
    const size_t bitstreamLen = 1ULL * h264.cbAvc420EncodedBitstream1 - pos2 + pos1;

    if ((bitstreamLen > UINT32_MAX) ||
        !Stream_CheckAndLogRequiredLengthWLog(gfx->base.log, s, bitstreamLen))
    {
      error = ERROR_INVALID_DATA;
      goto fail;
    }

    h264.bitstream[0].length = (UINT32)bitstreamLen;
    Stream_Seek(s, bitstreamLen);

    if ((error = rdpgfx_read_h264_metablock(gfx, s, &(h264.bitstream[1].meta))))
    {
      WLog_Print(gfx->base.log, WLOG_ERROR,
                 "rdpgfx_read_h264_metablock failed with error %" PRIu32 "!", error);
      goto fail;
    }

    h264.bitstream[1].data = Stream_Pointer(s);

    const size_t len = Stream_GetRemainingLength(s);
    if (len > UINT32_MAX)
      goto fail;
    h264.bitstream[1].length = (UINT32)len;
  }
  else
  {
    const size_t len = Stream_GetRemainingLength(s);
    if (len > UINT32_MAX)
      goto fail;
    h264.bitstream[0].length = (UINT32)len;
  }

  cmd->extra = (void*)&h264;

  error = logSurfaceCommand(gfx, cmd);

fail:
  Stream_Free(s, FALSE);
  free_h264_metablock(&h264.bitstream[0].meta);
  free_h264_metablock(&h264.bitstream[1].meta);
  cmd->extra = nullptr;
  return error;
}

/**
 * Function description
 *
 * @return 0 on success, otherwise a Win32 error code
 */
UINT rdpgfx_decode(RDPGFX_PLUGIN* gfx, RDPGFX_SURFACE_COMMAND* cmd)
{
  UINT error = CHANNEL_RC_OK;
  PROFILER_ENTER(context->SurfaceProfiler)

  switch (cmd->codecId)
  {
#if defined(WITH_GFX_AV1)
    case RDPGFX_CODECID_AV1:
#endif
    case RDPGFX_CODECID_AVC420:
      if ((error = rdpgfx_decode_AVC420(gfx, cmd)))
        WLog_Print(gfx->base.log, WLOG_ERROR,
                   "rdpgfx_decode_AVC420 failed with error %" PRIu32 "", error);

      break;

    case RDPGFX_CODECID_AVC444:
    case RDPGFX_CODECID_AVC444v2:
      if ((error = rdpgfx_decode_AVC444(gfx, cmd)))
        WLog_Print(gfx->base.log, WLOG_ERROR,
                   "rdpgfx_decode_AVC444 failed with error %" PRIu32 "", error);

      break;

    default:
      error = logSurfaceCommand(gfx, cmd);
      break;
  }

  PROFILER_EXIT(context->SurfaceProfiler)
  return error;
}

Coverage Report

Created: 2026-04-12 07:03

Line	Count	Source
1		/**
2		* FreeRDP: A Remote Desktop Protocol Implementation
3		* Graphics Pipeline Extension
4		*
5		* Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.com>
6		* Copyright 2015 Thincast Technologies GmbH
7		* Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
8		*
9		* Licensed under the Apache License, Version 2.0 (the "License");
10		* you may not use this file except in compliance with the License.
11		* You may obtain a copy of the License at
12		*
13		* http://www.apache.org/licenses/LICENSE-2.0
14		*
15		* Unless required by applicable law or agreed to in writing, software
16		* distributed under the License is distributed on an "AS IS" BASIS,
17		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18		* See the License for the specific language governing permissions and
19		* limitations under the License.
20		*/
21
22		#include <freerdp/config.h>
23
24		#include <winpr/crt.h>
25		#include <winpr/stream.h>
26		#include <freerdp/log.h>
27		#include <freerdp/utils/profiler.h>
28
29		#include "rdpgfx_common.h"
30
31		#include "rdpgfx_codec.h"
32
33		/**
34		* Function description
35		*
36		* @return 0 on success, otherwise a Win32 error code
37		*/
38		static UINT rdpgfx_read_h264_metablock(WINPR_ATTR_UNUSED RDPGFX_PLUGIN* gfx, wStream* s,
39		RDPGFX_H264_METABLOCK* meta)
40	0	{
41	0	RECTANGLE_16* regionRect = nullptr;
42	0	RDPGFX_H264_QUANT_QUALITY* quantQualityVal = nullptr;
43	0	UINT error = ERROR_INVALID_DATA;
44	0	meta->regionRects = nullptr;
45	0	meta->quantQualityVals = nullptr;
46
47	0	if (!Stream_CheckAndLogRequiredLengthWLog(gfx->base.log, s, 4))
48	0	goto error_out;
49
50	0	Stream_Read_UINT32(s, meta->numRegionRects); /* numRegionRects (4 bytes) */
51
52	0	if (!Stream_CheckAndLogRequiredLengthOfSizeWLog(gfx->base.log, s, meta->numRegionRects, 8ull))
53	0	goto error_out;
54
55	0	meta->regionRects = (RECTANGLE_16*)calloc(meta->numRegionRects, sizeof(RECTANGLE_16));
56
57	0	if (!meta->regionRects)
58	0	{
59	0	WLog_Print(gfx->base.log, WLOG_ERROR, "malloc failed!");
60	0	error = CHANNEL_RC_NO_MEMORY;
61	0	goto error_out;
62	0	}
63
64	0	meta->quantQualityVals =
65	0	(RDPGFX_H264_QUANT_QUALITY*)calloc(meta->numRegionRects, sizeof(RDPGFX_H264_QUANT_QUALITY));
66
67	0	if (!meta->quantQualityVals)
68	0	{
69	0	WLog_Print(gfx->base.log, WLOG_ERROR, "malloc failed!");
70	0	error = CHANNEL_RC_NO_MEMORY;
71	0	goto error_out;
72	0	}
73
74	0	WLog_Print(gfx->base.log, WLOG_TRACE, "H264_METABLOCK: numRegionRects: %" PRIu32 "",
75	0	meta->numRegionRects);
76
77	0	for (UINT32 index = 0; index < meta->numRegionRects; index++)
78	0	{
79	0	regionRect = &(meta->regionRects[index]);
80
81	0	if ((error = rdpgfx_read_rect16(gfx->base.log, s, regionRect)))
82	0	{
83	0	WLog_Print(gfx->base.log, WLOG_ERROR,
84	0	"rdpgfx_read_rect16 failed with error %" PRIu32 "!", error);
85	0	goto error_out;
86	0	}
87
88	0	WLog_Print(gfx->base.log, WLOG_TRACE,
89	0	"regionRects[%" PRIu32 "]: left: %" PRIu16 " top: %" PRIu16 " right: %" PRIu16
90	0	" bottom: %" PRIu16 "",
91	0	index, regionRect->left, regionRect->top, regionRect->right, regionRect->bottom);
92	0	}
93
94	0	if (!Stream_CheckAndLogRequiredLengthOfSizeWLog(gfx->base.log, s, meta->numRegionRects, 2ull))
95	0	{
96	0	error = ERROR_INVALID_DATA;
97	0	goto error_out;
98	0	}
99
100	0	for (UINT32 index = 0; index < meta->numRegionRects; index++)
101	0	{
102	0	quantQualityVal = &(meta->quantQualityVals[index]);
103	0	Stream_Read_UINT8(s, quantQualityVal->qpVal); /* qpVal (1 byte) */
104	0	Stream_Read_UINT8(s, quantQualityVal->qualityVal); /* qualityVal (1 byte) */
105	0	quantQualityVal->qp = quantQualityVal->qpVal & 0x3F;
106	0	quantQualityVal->r = (quantQualityVal->qpVal >> 6) & 1;
107	0	quantQualityVal->p = (quantQualityVal->qpVal >> 7) & 1;
108	0	WLog_Print(gfx->base.log, WLOG_TRACE,
109	0	"quantQualityVals[%" PRIu32 "]: qp: %" PRIu8 " r: %" PRIu8 " p: %" PRIu8
110	0	" qualityVal: %" PRIu8 "",
111	0	index, quantQualityVal->qp, quantQualityVal->r, quantQualityVal->p,
112	0	quantQualityVal->qualityVal);
113	0	}
114
115	0	return CHANNEL_RC_OK;
116	0	error_out:
117	0	free_h264_metablock(meta);
118	0	return error;
119	0	}
120
121		WINPR_ATTR_NODISCARD
122		static BOOL checkSurfaceCommand(const RDPGFX_PLUGIN* gfx, const RDPGFX_SURFACE_COMMAND* cmd)
123	0	{
124	0	switch (cmd->codecId)
125	0	{
126	0	case RDPGFX_CODECID_UNCOMPRESSED:
127	0	case RDPGFX_CODECID_CAVIDEO:
128	0	case RDPGFX_CODECID_CLEARCODEC:
129	0	case RDPGFX_CODECID_PLANAR:
130	0	case RDPGFX_CODECID_AVC420:
131	0	case RDPGFX_CODECID_ALPHA:
132	0	case RDPGFX_CODECID_AVC444:
133	0	case RDPGFX_CODECID_AVC444v2:
134	0	case RDPGFX_CODECID_CAPROGRESSIVE:
135	0	case RDPGFX_CODECID_CAPROGRESSIVE_V2:
136	0	return TRUE;
137		#if defined(WITH_GFX_AV1)
138		case RDPGFX_CODECID_AV1:
139		if (gfx->ConnectionCaps.version != RDPGFX_CAPVERSION_FRDP_1)
140		{
141		WLog_Print(gfx->base.log, WLOG_ERROR,
142		"RDPGFX_SURFACE_COMMAND::codecId %" PRIu32
143		" only supported with %s but connection uses %s [0x%08" PRIx32 "]",
144		cmd->codecId, rdpgfx_caps_version_str(RDPGFX_CAPVERSION_FRDP_1),
145		rdpgfx_caps_version_str(gfx->ConnectionCaps.version),
146		gfx->ConnectionCaps.version);
147		return FALSE;
148		}
149		return TRUE;
150		#endif
151	0	default:
152	0	WLog_Print(gfx->base.log, WLOG_ERROR,
153	0	"Unknown RDPGFX_SURFACE_COMMAND::codecId %" PRIu32, cmd->codecId);
154	0	return FALSE;
155	0	}
156	0	}
157
158		static UINT logSurfaceCommand(RDPGFX_PLUGIN* gfx, const RDPGFX_SURFACE_COMMAND* cmd)
159	0	{
160	0	WINPR_ASSERT(gfx);
161
162	0	WLog_Print(gfx->base.log, WLOG_DEBUG, "Got GFX %s",
163	0	rdpgfx_get_codec_id_string(WINPR_ASSERTING_INT_CAST(UINT16, cmd->codecId)));
164
165	0	RdpgfxClientContext* context = gfx->context;
166	0	if (!context)
167	0	return CHANNEL_RC_OK;
168
169	0	if (!checkSurfaceCommand(gfx, cmd))
170	0	return CHANNEL_RC_NULL_DATA;
171
172	0	const UINT error = IFCALLRESULT(CHANNEL_RC_OK, context->SurfaceCommand, context, cmd);
173
174	0	if (error)
175	0	WLog_Print(gfx->base.log, WLOG_ERROR,
176	0	"context->SurfaceCommand failed with error %" PRIu32 "", error);
177	0	return error;
178	0	}
179
180		/**
181		* Function description
182		*
183		* @return 0 on success, otherwise a Win32 error code
184		*/
185		static UINT rdpgfx_decode_AVC420(RDPGFX_PLUGIN* gfx, RDPGFX_SURFACE_COMMAND* cmd)
186	0	{
187	0	RDPGFX_AVC420_BITMAP_STREAM h264 = WINPR_C_ARRAY_INIT;
188	0	wStream* s = Stream_New(cmd->data, cmd->length);
189
190	0	if (!s)
191	0	{
192	0	WLog_Print(gfx->base.log, WLOG_ERROR, "Stream_New failed!");
193	0	return CHANNEL_RC_NO_MEMORY;
194	0	}
195
196	0	UINT error = rdpgfx_read_h264_metablock(gfx, s, &(h264.meta));
197	0	if (error != CHANNEL_RC_OK)
198	0	{
199	0	Stream_Free(s, FALSE);
200	0	WLog_Print(gfx->base.log, WLOG_ERROR,
201	0	"rdpgfx_read_h264_metablock failed with error %" PRIu32 "!", error);
202	0	return error;
203	0	}
204
205	0	h264.data = Stream_Pointer(s);
206	0	h264.length = (UINT32)Stream_GetRemainingLength(s);
207	0	Stream_Free(s, FALSE);
208	0	cmd->extra = (void*)&h264;
209
210	0	error = logSurfaceCommand(gfx, cmd);
211
212	0	free_h264_metablock(&h264.meta);
213	0	cmd->extra = nullptr;
214	0	return error;
215	0	}
216
217		/**
218		* Function description
219		*
220		* @return 0 on success, otherwise a Win32 error code
221		*/
222		static UINT rdpgfx_decode_AVC444(RDPGFX_PLUGIN* gfx, RDPGFX_SURFACE_COMMAND* cmd)
223	0	{
224	0	UINT error = CHANNEL_RC_OK;
225	0	UINT32 tmp = 0;
226	0	size_t pos1 = 0;
227	0	size_t pos2 = 0;
228
229	0	RDPGFX_AVC444_BITMAP_STREAM h264 = WINPR_C_ARRAY_INIT;
230	0	wStream* s = Stream_New(cmd->data, cmd->length);
231
232	0	if (!s)
233	0	{
234	0	WLog_Print(gfx->base.log, WLOG_ERROR, "Stream_New failed!");
235	0	return CHANNEL_RC_NO_MEMORY;
236	0	}
237
238	0	if (!Stream_CheckAndLogRequiredLengthWLog(gfx->base.log, s, 4))
239	0	{
240	0	error = ERROR_INVALID_DATA;
241	0	goto fail;
242	0	}
243
244	0	Stream_Read_UINT32(s, tmp);
245	0	h264.cbAvc420EncodedBitstream1 = tmp & 0x3FFFFFFFUL;
246	0	h264.LC = (tmp >> 30UL) & 0x03UL;
247
248	0	if (h264.LC == 0x03)
249	0	{
250	0	error = ERROR_INVALID_DATA;
251	0	goto fail;
252	0	}
253
254	0	pos1 = Stream_GetPosition(s);
255
256	0	if ((error = rdpgfx_read_h264_metablock(gfx, s, &(h264.bitstream[0].meta))))
257	0	{
258	0	WLog_Print(gfx->base.log, WLOG_ERROR,
259	0	"rdpgfx_read_h264_metablock failed with error %" PRIu32 "!", error);
260	0	goto fail;
261	0	}
262
263	0	pos2 = Stream_GetPosition(s);
264	0	h264.bitstream[0].data = Stream_Pointer(s);
265
266	0	if (h264.LC == 0)
267	0	{
268	0	const size_t bitstreamLen = 1ULL * h264.cbAvc420EncodedBitstream1 - pos2 + pos1;
269
270	0	if ((bitstreamLen > UINT32_MAX) \|\|
271	0	!Stream_CheckAndLogRequiredLengthWLog(gfx->base.log, s, bitstreamLen))
272	0	{
273	0	error = ERROR_INVALID_DATA;
274	0	goto fail;
275	0	}
276
277	0	h264.bitstream[0].length = (UINT32)bitstreamLen;
278	0	Stream_Seek(s, bitstreamLen);
279
280	0	if ((error = rdpgfx_read_h264_metablock(gfx, s, &(h264.bitstream[1].meta))))
281	0	{
282	0	WLog_Print(gfx->base.log, WLOG_ERROR,
283	0	"rdpgfx_read_h264_metablock failed with error %" PRIu32 "!", error);
284	0	goto fail;
285	0	}
286
287	0	h264.bitstream[1].data = Stream_Pointer(s);
288
289	0	const size_t len = Stream_GetRemainingLength(s);
290	0	if (len > UINT32_MAX)
291	0	goto fail;
292	0	h264.bitstream[1].length = (UINT32)len;
293	0	}
294	0	else
295	0	{
296	0	const size_t len = Stream_GetRemainingLength(s);
297	0	if (len > UINT32_MAX)
298	0	goto fail;
299	0	h264.bitstream[0].length = (UINT32)len;
300	0	}
301
302	0	cmd->extra = (void*)&h264;
303
304	0	error = logSurfaceCommand(gfx, cmd);
305
306	0	fail:
307	0	Stream_Free(s, FALSE);
308	0	free_h264_metablock(&h264.bitstream[0].meta);
309	0	free_h264_metablock(&h264.bitstream[1].meta);
310	0	cmd->extra = nullptr;
311	0	return error;
312	0	}
313
314		/**
315		* Function description
316		*
317		* @return 0 on success, otherwise a Win32 error code
318		*/
319		UINT rdpgfx_decode(RDPGFX_PLUGIN* gfx, RDPGFX_SURFACE_COMMAND* cmd)
320	0	{
321	0	UINT error = CHANNEL_RC_OK;
322	0	PROFILER_ENTER(context->SurfaceProfiler)
323
324	0	switch (cmd->codecId)
325	0	{
326		#if defined(WITH_GFX_AV1)
327		case RDPGFX_CODECID_AV1:
328		#endif
329	0	case RDPGFX_CODECID_AVC420:
330	0	if ((error = rdpgfx_decode_AVC420(gfx, cmd)))
331	0	WLog_Print(gfx->base.log, WLOG_ERROR,
332	0	"rdpgfx_decode_AVC420 failed with error %" PRIu32 "", error);
333
334	0	break;
335
336	0	case RDPGFX_CODECID_AVC444:
337	0	case RDPGFX_CODECID_AVC444v2:
338	0	if ((error = rdpgfx_decode_AVC444(gfx, cmd)))
339	0	WLog_Print(gfx->base.log, WLOG_ERROR,
340	0	"rdpgfx_decode_AVC444 failed with error %" PRIu32 "", error);
341
342	0	break;
343
344	0	default:
345	0	error = logSurfaceCommand(gfx, cmd);
346	0	break;
347	0	}
348
349	0	PROFILER_EXIT(context->SurfaceProfiler)
350	0	return error;
351	0	}