RFX_MESSAGE* rfx_process_message(RFX_CONTEXT* context, BYTE* data, UINT32 length)
{
int pos;
STREAM* s;
UINT32 blockLen;
UINT32 blockType;
RFX_MESSAGE* message;
message = (RFX_MESSAGE*) malloc(sizeof(RFX_MESSAGE));
ZeroMemory(message, sizeof(RFX_MESSAGE));
s = stream_new(0);
stream_attach(s, data, length);
while (stream_get_left(s) > 6)
{
/* RFX_BLOCKT */
stream_read_UINT16(s, blockType); /* blockType (2 bytes) */
stream_read_UINT32(s, blockLen); /* blockLen (4 bytes) */
DEBUG_RFX("blockType 0x%X blockLen %d", blockType, blockLen);
if (blockLen == 0)
{
DEBUG_WARN("zero blockLen");
break;
}
if (stream_get_left(s) < blockLen - 6)
{
DEBUG_WARN("rfx_process_message: packet too small for blocklen=%d", blockLen);
break;
}
pos = stream_get_pos(s) - 6 + blockLen;
if (blockType >= WBT_CONTEXT && blockType <= WBT_EXTENSION)
{
/* RFX_CODEC_CHANNELT */
/* codecId (1 byte) must be set to 0x01 */
/* channelId (1 byte) must be set to 0x00 */
if (!stream_skip(s, 2))
{
DEBUG_WARN("rfx_process_message: unable to skip RFX_CODEC_CHANNELT");
break;
}
}
switch (blockType)
{
case WBT_SYNC:
rfx_process_message_sync(context, s);
break;
case WBT_CODEC_VERSIONS:
rfx_process_message_codec_versions(context, s);
break;
case WBT_CHANNELS:
rfx_process_message_channels(context, s);
break;
case WBT_CONTEXT:
rfx_process_message_context(context, s);
break;
case WBT_FRAME_BEGIN:
rfx_process_message_frame_begin(context, message, s);
break;
case WBT_FRAME_END:
rfx_process_message_frame_end(context, message, s);
break;
case WBT_REGION:
rfx_process_message_region(context, message, s);
break;
case WBT_EXTENSION:
rfx_process_message_tileset(context, message, s);
break;
default:
DEBUG_WARN("unknown blockType 0x%X", blockType);
break;
}
stream_set_pos(s, pos);
}
stream_detach(s);
stream_free(s);
return message;
}
RFX_MESSAGE* rfx_process_message(RFX_CONTEXT* context, uint8* data, uint32 length)
{
int pos;
STREAM* s;
uint32 blockLen;
uint32 blockType;
RFX_MESSAGE* message;
s = stream_new(0);
message = xnew(RFX_MESSAGE);
stream_attach(s, data, length);
while (stream_get_left(s) > 6)
{
/* RFX_BLOCKT */
stream_read_uint16(s, blockType); /* blockType (2 bytes) */
stream_read_uint32(s, blockLen); /* blockLen (4 bytes) */
DEBUG_RFX("blockType 0x%X blockLen %d", blockType, blockLen);
if (blockLen == 0)
{
DEBUG_WARN("zero blockLen");
break;
}
pos = stream_get_pos(s) - 6 + blockLen;
if (blockType >= WBT_CONTEXT && blockType <= WBT_EXTENSION)
{
/* RFX_CODEC_CHANNELT */
/* codecId (1 byte) must be set to 0x01 */
/* channelId (1 byte) must be set to 0x00 */
stream_seek(s, 2);
}
switch (blockType)
{
case WBT_SYNC:
rfx_process_message_sync(context, s);
break;
case WBT_CODEC_VERSIONS:
rfx_process_message_codec_versions(context, s);
break;
case WBT_CHANNELS:
rfx_process_message_channels(context, s);
break;
case WBT_CONTEXT:
rfx_process_message_context(context, s);
break;
case WBT_FRAME_BEGIN:
rfx_process_message_frame_begin(context, message, s);
break;
case WBT_FRAME_END:
rfx_process_message_frame_end(context, message, s);
break;
case WBT_REGION:
rfx_process_message_region(context, message, s);
break;
case WBT_EXTENSION:
rfx_process_message_tileset(context, message, s);
break;
default:
DEBUG_WARN("unknown blockType 0x%X", blockType);
break;
}
stream_set_pos(s, pos);
}
stream_detach(s);
stream_free(s);
return message;
}
RFX_MESSAGE* rfx_process_message(RFX_CONTEXT* context, BYTE* data, UINT32 length)
{
int pos;
UINT32 blockLen;
UINT32 blockType;
RFX_MESSAGE* message = NULL;
wStream* s = NULL;
BOOL ok = TRUE;
UINT16 expectedDataBlockType = WBT_FRAME_BEGIN;
if (!context || !data || !length)
goto fail;
if (!(s = Stream_New(data, length)))
goto fail;
if (!(message = (RFX_MESSAGE*) calloc(1, sizeof(RFX_MESSAGE))))
goto fail;
message->freeRects = TRUE;
while (ok && Stream_GetRemainingLength(s) > 6)
{
/* RFX_BLOCKT */
Stream_Read_UINT16(s, blockType); /* blockType (2 bytes) */
Stream_Read_UINT32(s, blockLen); /* blockLen (4 bytes) */
WLog_Print(context->priv->log, WLOG_DEBUG, "blockType 0x%X blockLen %d", blockType, blockLen);
if (blockLen == 0)
{
WLog_ERR(TAG, "zero blockLen");
goto fail;
}
if (Stream_GetRemainingLength(s) < blockLen - 6)
{
WLog_ERR(TAG, "%s: packet too small for blocklen=%d", __FUNCTION__, blockLen);
goto fail;
}
pos = Stream_GetPosition(s) - 6 + blockLen;
if (blockType > WBT_CONTEXT && context->decodedHeaderBlocks != _RFX_DECODED_HEADERS)
{
WLog_ERR(TAG, "%s: incomplete header blocks processing", __FUNCTION__);
goto fail;
}
if (blockType >= WBT_CONTEXT && blockType <= WBT_EXTENSION)
{
/* RFX_CODEC_CHANNELT */
UINT8 codecId;
UINT8 channelId;
if (Stream_GetRemainingLength(s) < 2)
goto fail;
Stream_Read_UINT8(s, codecId); /* codecId (1 byte) must be set to 0x01 */
Stream_Read_UINT8(s, channelId); /* channelId (1 byte) 0xFF or 0x00, see below */
if (codecId != 0x01)
{
WLog_ERR(TAG, "%s: invalid codecId 0x%02X", __FUNCTION__, codecId);
goto fail;
}
if (blockType == WBT_CONTEXT)
{
/* If the blockType is set to WBT_CONTEXT, then channelId MUST be set to 0xFF.*/
if (channelId != 0xFF)
{
WLog_ERR(TAG, "%s: invalid channelId 0x%02X for blockType 0x%04X", __FUNCTION__, channelId, blockType);
goto fail;
}
}
else
{
/* For all other values of blockType, channelId MUST be set to 0x00. */
if (channelId != 0x00)
{
WLog_ERR(TAG, "%s: invalid channelId 0x%02X for blockType WBT_CONTEXT", __FUNCTION__, channelId);
goto fail;
}
}
}
switch (blockType)
{
/* Header messages:
* The stream MUST start with the header messages and any of these headers can appear
* in the stream at a later stage. The header messages can be repeated.
*/
case WBT_SYNC:
ok = rfx_process_message_sync(context, s);
break;
case WBT_CONTEXT:
ok = rfx_process_message_context(context, s);
break;
case WBT_CODEC_VERSIONS:
ok = rfx_process_message_codec_versions(context, s);
break;
case WBT_CHANNELS:
ok = rfx_process_message_channels(context, s);
break;
/* Data messages:
* The data associated with each encoded frame or image is always bracketed by the
* TS_RFX_FRAME_BEGIN (section 2.2.2.3.1) and TS_RFX_FRAME_END (section 2.2.2.3.2) messages.
* There MUST only be one TS_RFX_REGION (section 2.2.2.3.3) message per frame and one TS_RFX_TILESET
* (section 2.2.2.3.4) message per TS_RFX_REGION.
*/
case WBT_FRAME_BEGIN:
ok = rfx_process_message_frame_begin(context, message, s, &expectedDataBlockType);
break;
case WBT_REGION:
ok = rfx_process_message_region(context, message, s, &expectedDataBlockType);
break;
case WBT_EXTENSION:
ok = rfx_process_message_tileset(context, message, s, &expectedDataBlockType);
break;
case WBT_FRAME_END:
ok = rfx_process_message_frame_end(context, message, s, &expectedDataBlockType);
break;
default:
WLog_ERR(TAG, "%s: unknown blockType 0x%X", __FUNCTION__, blockType);
goto fail;
}
Stream_SetPosition(s, pos);
}
if (ok)
{
Stream_Free(s, FALSE);
return message;
}
fail:
Stream_Free(s, FALSE);
rfx_message_free(context, message);
return NULL;
}
RFX_MESSAGE* rfx_process_message(RFX_CONTEXT* context, BYTE* data, UINT32 length)
{
int pos;
wStream* s;
UINT32 blockLen;
UINT32 blockType;
RFX_MESSAGE* message;
message = (RFX_MESSAGE*) malloc(sizeof(RFX_MESSAGE));
ZeroMemory(message, sizeof(RFX_MESSAGE));
message->freeRects = TRUE;
s = Stream_New(data, length);
while (Stream_GetRemainingLength(s) > 6)
{
/* RFX_BLOCKT */
Stream_Read_UINT16(s, blockType); /* blockType (2 bytes) */
Stream_Read_UINT32(s, blockLen); /* blockLen (4 bytes) */
WLog_Print(context->priv->log, WLOG_DEBUG, "blockType 0x%X blockLen %d", blockType, blockLen);
if (blockLen == 0)
{
DEBUG_WARN("zero blockLen");
break;
}
if (Stream_GetRemainingLength(s) < blockLen - 6)
{
DEBUG_WARN("rfx_process_message: packet too small for blocklen=%d", blockLen);
break;
}
pos = Stream_GetPosition(s) - 6 + blockLen;
if (blockType >= WBT_CONTEXT && blockType <= WBT_EXTENSION)
{
/* RFX_CODEC_CHANNELT */
/* codecId (1 byte) must be set to 0x01 */
/* channelId (1 byte) must be set to 0x00 */
if (!Stream_SafeSeek(s, 2))
{
DEBUG_WARN("rfx_process_message: unable to skip RFX_CODEC_CHANNELT");
break;
}
}
switch (blockType)
{
case WBT_SYNC:
rfx_process_message_sync(context, s);
break;
case WBT_CODEC_VERSIONS:
rfx_process_message_codec_versions(context, s);
break;
case WBT_CHANNELS:
rfx_process_message_channels(context, s);
break;
case WBT_CONTEXT:
rfx_process_message_context(context, s);
break;
case WBT_FRAME_BEGIN:
rfx_process_message_frame_begin(context, message, s);
break;
case WBT_FRAME_END:
rfx_process_message_frame_end(context, message, s);
break;
case WBT_REGION:
rfx_process_message_region(context, message, s);
break;
case WBT_EXTENSION:
rfx_process_message_tileset(context, message, s);
break;
default:
DEBUG_WARN("unknown blockType 0x%X", blockType);
break;
}
Stream_SetPosition(s, pos);
}
Stream_Free(s, FALSE);
return message;
}
