973 lines
26 KiB
C
973 lines
26 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Server Audio Virtual Channel
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*
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* Copyright 2012 Vic Lee
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* Copyright 2015 Thincast Technologies GmbH
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* Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <winpr/crt.h>
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#include <winpr/print.h>
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#include <winpr/stream.h>
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#include <freerdp/channels/log.h>
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#include "rdpsnd_common.h"
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#include "rdpsnd_main.h"
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT rdpsnd_server_send_formats(RdpsndServerContext* context, wStream* s)
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{
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size_t pos;
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UINT16 i;
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BOOL status;
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ULONG written;
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Stream_Write_UINT8(s, SNDC_FORMATS);
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Stream_Write_UINT8(s, 0);
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Stream_Seek_UINT16(s);
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Stream_Write_UINT32(s, 0); /* dwFlags */
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Stream_Write_UINT32(s, 0); /* dwVolume */
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Stream_Write_UINT32(s, 0); /* dwPitch */
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Stream_Write_UINT16(s, 0); /* wDGramPort */
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Stream_Write_UINT16(s, context->num_server_formats); /* wNumberOfFormats */
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Stream_Write_UINT8(s, context->block_no); /* cLastBlockConfirmed */
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Stream_Write_UINT16(s, CHANNEL_VERSION_WIN_MAX); /* wVersion */
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Stream_Write_UINT8(s, 0); /* bPad */
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for (i = 0; i < context->num_server_formats; i++)
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{
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Stream_Write_UINT16(s,
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context->server_formats[i].wFormatTag); /* wFormatTag (WAVE_FORMAT_PCM) */
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Stream_Write_UINT16(s, context->server_formats[i].nChannels); /* nChannels */
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Stream_Write_UINT32(s,
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context->server_formats[i].nSamplesPerSec); /* nSamplesPerSec */
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Stream_Write_UINT32(s, context->server_formats[i].nSamplesPerSec*
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context->server_formats[i].nChannels*
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context->server_formats[i].wBitsPerSample / 8); /* nAvgBytesPerSec */
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Stream_Write_UINT16(s,
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context->server_formats[i].nBlockAlign); /* nBlockAlign */
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Stream_Write_UINT16(s,
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context->server_formats[i].wBitsPerSample); /* wBitsPerSample */
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Stream_Write_UINT16(s, context->server_formats[i].cbSize); /* cbSize */
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if (context->server_formats[i].cbSize > 0)
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{
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Stream_Write(s, context->server_formats[i].data,
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context->server_formats[i].cbSize);
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}
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}
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pos = Stream_GetPosition(s);
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Stream_SetPosition(s, 2);
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Stream_Write_UINT16(s, pos - 4);
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Stream_SetPosition(s, pos);
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status = WTSVirtualChannelWrite(context->priv->ChannelHandle,
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(PCHAR) Stream_Buffer(s), Stream_GetPosition(s), &written);
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Stream_SetPosition(s, 0);
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return status ? CHANNEL_RC_OK : ERROR_INTERNAL_ERROR;
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}
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT rdpsnd_server_recv_waveconfirm(RdpsndServerContext* context,
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wStream* s)
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{
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UINT16 timestamp;
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BYTE confirmBlockNum;
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UINT error = CHANNEL_RC_OK;
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if (Stream_GetRemainingLength(s) < 4)
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{
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WLog_ERR(TAG, "not enough data in stream!");
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return ERROR_INVALID_DATA;
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}
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Stream_Read_UINT16(s, timestamp);
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Stream_Read_UINT8(s, confirmBlockNum);
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Stream_Seek_UINT8(s);
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IFCALLRET(context->ConfirmBlock, error, context, confirmBlockNum, timestamp);
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if (error)
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WLog_ERR(TAG, "context->ConfirmBlock failed with error %"PRIu32"", error);
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return error;
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}
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT rdpsnd_server_recv_quality_mode(RdpsndServerContext* context,
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wStream* s)
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{
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UINT16 quality;
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if (Stream_GetRemainingLength(s) < 4)
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{
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WLog_ERR(TAG, "not enough data in stream!");
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return ERROR_INVALID_DATA;
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}
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Stream_Read_UINT16(s, quality);
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Stream_Seek_UINT16(s); // reserved
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WLog_DBG(TAG, "Client requested sound quality: 0x%04"PRIX16"", quality);
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return CHANNEL_RC_OK;
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}
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT rdpsnd_server_recv_formats(RdpsndServerContext* context, wStream* s)
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{
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UINT16 i, num_known_format = 0;
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UINT32 flags, vol, pitch;
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UINT16 udpPort;
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BYTE lastblock;
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UINT error = CHANNEL_RC_OK;
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if (Stream_GetRemainingLength(s) < 20)
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{
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WLog_ERR(TAG, "not enough data in stream!");
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return ERROR_INVALID_DATA;
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}
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Stream_Read_UINT32(s, flags); /* dwFlags */
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Stream_Read_UINT32(s, vol); /* dwVolume */
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Stream_Read_UINT32(s, pitch); /* dwPitch */
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Stream_Read_UINT16(s, udpPort); /* wDGramPort */
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Stream_Read_UINT16(s, context->num_client_formats); /* wNumberOfFormats */
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Stream_Read_UINT8(s, lastblock); /* cLastBlockConfirmed */
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Stream_Read_UINT16(s, context->clientVersion); /* wVersion */
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Stream_Seek_UINT8(s); /* bPad */
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/* this check is only a guess as cbSize can influence the size of a format record */
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if (Stream_GetRemainingLength(s) < context->num_client_formats * 18)
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{
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WLog_ERR(TAG, "not enough data in stream!");
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return ERROR_INVALID_DATA;
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}
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if (!context->num_client_formats)
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{
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WLog_ERR(TAG, "client doesn't support any format!");
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return ERROR_INTERNAL_ERROR;
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}
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context->client_formats = (AUDIO_FORMAT*)calloc(context->num_client_formats,
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sizeof(AUDIO_FORMAT));
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if (!context->client_formats)
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{
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WLog_ERR(TAG, "calloc failed!");
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return CHANNEL_RC_NO_MEMORY;
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}
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for (i = 0; i < context->num_client_formats; i++)
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{
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if (Stream_GetRemainingLength(s) < 18)
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{
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WLog_ERR(TAG, "not enough data in stream!");
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error = ERROR_INVALID_DATA;
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goto out_free;
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}
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Stream_Read_UINT16(s, context->client_formats[i].wFormatTag);
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Stream_Read_UINT16(s, context->client_formats[i].nChannels);
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Stream_Read_UINT32(s, context->client_formats[i].nSamplesPerSec);
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Stream_Read_UINT32(s, context->client_formats[i].nAvgBytesPerSec);
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Stream_Read_UINT16(s, context->client_formats[i].nBlockAlign);
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Stream_Read_UINT16(s, context->client_formats[i].wBitsPerSample);
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Stream_Read_UINT16(s, context->client_formats[i].cbSize);
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if (context->client_formats[i].cbSize > 0)
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{
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if (!Stream_SafeSeek(s, context->client_formats[i].cbSize))
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{
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WLog_ERR(TAG, "Stream_SafeSeek failed!");
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error = ERROR_INTERNAL_ERROR;
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goto out_free;
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}
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}
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if (context->client_formats[i].wFormatTag != 0)
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{
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//lets call this a known format
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//TODO: actually look through our own list of known formats
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num_known_format++;
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}
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}
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if (!context->num_client_formats)
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{
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WLog_ERR(TAG, "client doesn't support any known format!");
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goto out_free;
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}
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return CHANNEL_RC_OK;
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out_free:
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free(context->client_formats);
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return error;
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}
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static DWORD WINAPI rdpsnd_server_thread(LPVOID arg)
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{
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DWORD nCount, status;
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HANDLE events[8];
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RdpsndServerContext* context;
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UINT error = CHANNEL_RC_OK;
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context = (RdpsndServerContext*)arg;
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nCount = 0;
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events[nCount++] = context->priv->channelEvent;
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events[nCount++] = context->priv->StopEvent;
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if ((error = rdpsnd_server_send_formats(context, context->priv->rdpsnd_pdu)))
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{
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WLog_ERR(TAG, "rdpsnd_server_send_formats failed with error %"PRIu32"", error);
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goto out;
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}
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while (TRUE)
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{
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status = WaitForMultipleObjects(nCount, events, FALSE, INFINITE);
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if (status == WAIT_FAILED)
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{
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error = GetLastError();
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WLog_ERR(TAG, "WaitForMultipleObjects failed with error %"PRIu32"!", error);
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break;
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}
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status = WaitForSingleObject(context->priv->StopEvent, 0);
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if (status == WAIT_FAILED)
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{
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error = GetLastError();
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WLog_ERR(TAG, "WaitForSingleObject failed with error %"PRIu32"!", error);
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break;
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}
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if (status == WAIT_OBJECT_0)
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break;
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if ((error = rdpsnd_server_handle_messages(context)))
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{
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WLog_ERR(TAG, "rdpsnd_server_handle_messages failed with error %"PRIu32"", error);
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break;
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}
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}
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out:
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if (error && context->rdpcontext)
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setChannelError(context->rdpcontext, error,
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"rdpsnd_server_thread reported an error");
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ExitThread(error);
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return error;
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}
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT rdpsnd_server_initialize(RdpsndServerContext* context,
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BOOL ownThread)
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{
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context->priv->ownThread = ownThread;
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return context->Start(context);
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}
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT rdpsnd_server_select_format(RdpsndServerContext* context,
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UINT16 client_format_index)
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{
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int bs;
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int out_buffer_size;
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AUDIO_FORMAT* format;
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UINT error = CHANNEL_RC_OK;
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if (client_format_index < 0
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|| client_format_index >= context->num_client_formats)
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{
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WLog_ERR(TAG, "index %d is not correct.", client_format_index);
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return ERROR_INVALID_DATA;
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}
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EnterCriticalSection(&context->priv->lock);
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context->priv->src_bytes_per_sample = context->src_format.wBitsPerSample / 8;
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context->priv->src_bytes_per_frame = context->priv->src_bytes_per_sample *
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context->src_format.nChannels;
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context->selected_client_format = client_format_index;
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format = &context->client_formats[client_format_index];
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if (format->nSamplesPerSec == 0)
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{
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WLog_ERR(TAG, "invalid Client Sound Format!!");
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error = ERROR_INVALID_DATA;
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goto out;
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}
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if (context->latency <= 0)
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context->latency = 50;
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context->priv->out_frames = context->src_format.nSamplesPerSec *
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context->latency / 1000;
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if (context->priv->out_frames < 1)
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context->priv->out_frames = 1;
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switch (format->wFormatTag)
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{
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case WAVE_FORMAT_DVI_ADPCM:
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bs = (format->nBlockAlign - 4 * format->nChannels) * 4;
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context->priv->out_frames -= context->priv->out_frames % bs;
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if (context->priv->out_frames < bs)
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context->priv->out_frames = bs;
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break;
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case WAVE_FORMAT_ADPCM:
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bs = (format->nBlockAlign - 7 * format->nChannels) * 2 / format->nChannels + 2;
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context->priv->out_frames -= context->priv->out_frames % bs;
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if (context->priv->out_frames < bs)
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context->priv->out_frames = bs;
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break;
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}
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context->priv->out_pending_frames = 0;
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out_buffer_size = context->priv->out_frames *
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context->priv->src_bytes_per_frame;
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if (context->priv->out_buffer_size < out_buffer_size)
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{
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BYTE* newBuffer;
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newBuffer = (BYTE*)realloc(context->priv->out_buffer, out_buffer_size);
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if (!newBuffer)
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{
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WLog_ERR(TAG, "realloc failed!");
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error = CHANNEL_RC_NO_MEMORY;
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goto out;
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}
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context->priv->out_buffer = newBuffer;
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context->priv->out_buffer_size = out_buffer_size;
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}
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freerdp_dsp_context_reset(context->priv->dsp_context, format);
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out:
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LeaveCriticalSection(&context->priv->lock);
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return error;
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}
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/**
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* Function description
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* context->priv->lock should be obtained before calling this function
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT rdpsnd_server_send_wave_pdu(RdpsndServerContext* context,
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UINT16 wTimestamp)
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{
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size_t length;
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size_t start, end = 0;
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const BYTE* src;
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AUDIO_FORMAT* format;
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ULONG written;
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wStream* s = context->priv->rdpsnd_pdu;
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UINT error = CHANNEL_RC_OK;
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format = &context->client_formats[context->selected_client_format];
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/* WaveInfo PDU */
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Stream_SetPosition(s, 0);
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Stream_Write_UINT8(s, SNDC_WAVE); /* msgType */
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Stream_Write_UINT8(s, 0); /* bPad */
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Stream_Write_UINT16(s, 0); /* BodySize */
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Stream_Write_UINT16(s, wTimestamp); /* wTimeStamp */
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Stream_Write_UINT16(s, context->selected_client_format); /* wFormatNo */
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Stream_Write_UINT8(s, context->block_no); /* cBlockNo */
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Stream_Seek(s, 3); /* bPad */
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start = Stream_GetPosition(s);
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src = context->priv->out_buffer;
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length = context->priv->out_pending_frames * context->priv->src_bytes_per_frame;
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if (!freerdp_dsp_encode(context->priv->dsp_context, format, src, length, s))
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error = ERROR_INTERNAL_ERROR;
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else
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{
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/* Set stream size */
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end = Stream_GetPosition(s);
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Stream_SetPosition(s, 2);
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Stream_Write_UINT16(s, end - start + 8);
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Stream_SetPosition(s, end);
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context->block_no = (context->block_no + 1) % 256;
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|
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if (!WTSVirtualChannelWrite(context->priv->ChannelHandle,
|
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(PCHAR) Stream_Buffer(s), start + 4, &written))
|
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{
|
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WLog_ERR(TAG, "WTSVirtualChannelWrite failed!");
|
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error = ERROR_INTERNAL_ERROR;
|
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}
|
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}
|
|
|
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if (error != CHANNEL_RC_OK)
|
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{
|
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WLog_ERR(TAG, "WTSVirtualChannelWrite failed!");
|
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error = ERROR_INTERNAL_ERROR;
|
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goto out;
|
|
}
|
|
|
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Stream_SetPosition(s, start);
|
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Stream_Write_UINT32(s, 0); /* bPad */
|
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Stream_SetPosition(s, start);
|
|
|
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if (!WTSVirtualChannelWrite(context->priv->ChannelHandle,
|
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(PCHAR) Stream_Pointer(s), end - start, &written))
|
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{
|
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WLog_ERR(TAG, "WTSVirtualChannelWrite failed!");
|
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error = ERROR_INTERNAL_ERROR;
|
|
}
|
|
|
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out:
|
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Stream_SetPosition(s, 0);
|
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context->priv->out_pending_frames = 0;
|
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return error;
|
|
}
|
|
|
|
/**
|
|
* Function description
|
|
* context->priv->lock should be obtained before calling this function
|
|
*
|
|
* @return 0 on success, otherwise a Win32 error code
|
|
*/
|
|
static UINT rdpsnd_server_send_wave2_pdu(RdpsndServerContext* context,
|
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UINT16 wTimestamp)
|
|
{
|
|
size_t length;
|
|
size_t end = 0;
|
|
const BYTE* src;
|
|
AUDIO_FORMAT* format;
|
|
ULONG written;
|
|
wStream* s = context->priv->rdpsnd_pdu;
|
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UINT error = CHANNEL_RC_OK;
|
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format = &context->client_formats[context->selected_client_format];
|
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/* WaveInfo PDU */
|
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Stream_SetPosition(s, 0);
|
|
Stream_Write_UINT8(s, SNDC_WAVE2); /* msgType */
|
|
Stream_Write_UINT8(s, 0); /* bPad */
|
|
Stream_Write_UINT16(s, 0); /* BodySize */
|
|
Stream_Write_UINT16(s, wTimestamp); /* wTimeStamp */
|
|
Stream_Write_UINT16(s, context->selected_client_format); /* wFormatNo */
|
|
Stream_Write_UINT8(s, context->block_no); /* cBlockNo */
|
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Stream_Seek(s, 3); /* bPad */
|
|
Stream_Write_UINT16(s, wTimestamp); /* dwAudioTimeStamp */
|
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src = context->priv->out_buffer;
|
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length = context->priv->out_pending_frames * context->priv->src_bytes_per_frame;
|
|
|
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if (!freerdp_dsp_encode(context->priv->dsp_context, format, src, length, s))
|
|
error = ERROR_INTERNAL_ERROR;
|
|
else
|
|
{
|
|
/* Set stream size */
|
|
end = Stream_GetPosition(s);
|
|
Stream_SetPosition(s, 2);
|
|
Stream_Write_UINT16(s, end - 4);
|
|
Stream_SetPosition(s, end);
|
|
Stream_SealLength(s);
|
|
context->block_no = (context->block_no + 1) % 256;
|
|
|
|
if (!WTSVirtualChannelWrite(context->priv->ChannelHandle,
|
|
(PCHAR) Stream_Buffer(s), Stream_Length(s), &written))
|
|
{
|
|
WLog_ERR(TAG, "WTSVirtualChannelWrite failed!");
|
|
error = ERROR_INTERNAL_ERROR;
|
|
}
|
|
}
|
|
|
|
out:
|
|
Stream_SetPosition(s, 0);
|
|
context->priv->out_pending_frames = 0;
|
|
return error;
|
|
}
|
|
|
|
/* Wrapper function to send WAVE or WAVE2 PDU depending on client connected */
|
|
static UINT rdpsnd_server_send_audio_pdu(RdpsndServerContext* context,
|
|
UINT16 wTimestamp)
|
|
{
|
|
if (context->clientVersion >= CHANNEL_VERSION_WIN_8)
|
|
return rdpsnd_server_send_wave2_pdu(context, wTimestamp);
|
|
else
|
|
return rdpsnd_server_send_wave_pdu(context, wTimestamp);
|
|
}
|
|
|
|
/**
|
|
* Function description
|
|
*
|
|
* @return 0 on success, otherwise a Win32 error code
|
|
*/
|
|
static UINT rdpsnd_server_send_samples(RdpsndServerContext* context,
|
|
const void* buf, int nframes, UINT16 wTimestamp)
|
|
{
|
|
int cframes;
|
|
int cframesize;
|
|
UINT error = CHANNEL_RC_OK;
|
|
EnterCriticalSection(&context->priv->lock);
|
|
|
|
if (context->selected_client_format < 0)
|
|
{
|
|
/* It's possible while format negotiation has not been done */
|
|
WLog_WARN(TAG, "Drop samples because client format has not been negotiated.");
|
|
error = ERROR_NOT_READY;
|
|
goto out;
|
|
}
|
|
|
|
while (nframes > 0)
|
|
{
|
|
cframes = MIN(nframes, context->priv->out_frames -
|
|
context->priv->out_pending_frames);
|
|
cframesize = cframes * context->priv->src_bytes_per_frame;
|
|
CopyMemory(context->priv->out_buffer +
|
|
(context->priv->out_pending_frames * context->priv->src_bytes_per_frame), buf,
|
|
cframesize);
|
|
buf = (BYTE*) buf + cframesize;
|
|
nframes -= cframes;
|
|
context->priv->out_pending_frames += cframes;
|
|
|
|
if (context->priv->out_pending_frames >= context->priv->out_frames)
|
|
{
|
|
if ((error = rdpsnd_server_send_audio_pdu(context, wTimestamp)))
|
|
{
|
|
WLog_ERR(TAG, "rdpsnd_server_send_audio_pdu failed with error %"PRIu32"", error);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
out:
|
|
LeaveCriticalSection(&context->priv->lock);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* Function description
|
|
*
|
|
* @return 0 on success, otherwise a Win32 error code
|
|
*/
|
|
static UINT rdpsnd_server_set_volume(RdpsndServerContext* context, int left,
|
|
int right)
|
|
{
|
|
size_t pos;
|
|
BOOL status;
|
|
ULONG written;
|
|
wStream* s = context->priv->rdpsnd_pdu;
|
|
Stream_Write_UINT8(s, SNDC_SETVOLUME);
|
|
Stream_Write_UINT8(s, 0);
|
|
Stream_Seek_UINT16(s);
|
|
Stream_Write_UINT16(s, left);
|
|
Stream_Write_UINT16(s, right);
|
|
pos = Stream_GetPosition(s);
|
|
Stream_SetPosition(s, 2);
|
|
Stream_Write_UINT16(s, pos - 4);
|
|
Stream_SetPosition(s, pos);
|
|
status = WTSVirtualChannelWrite(context->priv->ChannelHandle,
|
|
(PCHAR) Stream_Buffer(s), Stream_GetPosition(s), &written);
|
|
Stream_SetPosition(s, 0);
|
|
return status ? CHANNEL_RC_OK : ERROR_INTERNAL_ERROR;
|
|
}
|
|
|
|
/**
|
|
* Function description
|
|
*
|
|
* @return 0 on success, otherwise a Win32 error code
|
|
*/
|
|
static UINT rdpsnd_server_close(RdpsndServerContext* context)
|
|
{
|
|
size_t pos;
|
|
BOOL status;
|
|
ULONG written;
|
|
wStream* s = context->priv->rdpsnd_pdu;
|
|
UINT error = CHANNEL_RC_OK;
|
|
EnterCriticalSection(&context->priv->lock);
|
|
|
|
if (context->priv->out_pending_frames > 0)
|
|
{
|
|
if (context->selected_client_format < 0)
|
|
{
|
|
WLog_ERR(TAG, "Pending audio frame exists while no format selected.");
|
|
error = ERROR_INVALID_DATA;
|
|
}
|
|
else if ((error = rdpsnd_server_send_audio_pdu(context, 0)))
|
|
{
|
|
WLog_ERR(TAG, "rdpsnd_server_send_audio_pdu failed with error %"PRIu32"", error);
|
|
}
|
|
}
|
|
|
|
LeaveCriticalSection(&context->priv->lock);
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
context->selected_client_format = -1;
|
|
Stream_Write_UINT8(s, SNDC_CLOSE);
|
|
Stream_Write_UINT8(s, 0);
|
|
Stream_Seek_UINT16(s);
|
|
pos = Stream_GetPosition(s);
|
|
Stream_SetPosition(s, 2);
|
|
Stream_Write_UINT16(s, pos - 4);
|
|
Stream_SetPosition(s, pos);
|
|
status = WTSVirtualChannelWrite(context->priv->ChannelHandle,
|
|
(PCHAR) Stream_Buffer(s), Stream_GetPosition(s), &written);
|
|
Stream_SetPosition(s, 0);
|
|
return status ? CHANNEL_RC_OK : ERROR_INTERNAL_ERROR;
|
|
}
|
|
|
|
/**
|
|
* Function description
|
|
*
|
|
* @return 0 on success, otherwise a Win32 error code
|
|
*/
|
|
static UINT rdpsnd_server_start(RdpsndServerContext* context)
|
|
{
|
|
void* buffer = NULL;
|
|
DWORD bytesReturned;
|
|
RdpsndServerPrivate* priv = context->priv;
|
|
UINT error = ERROR_INTERNAL_ERROR;
|
|
priv->ChannelHandle = WTSVirtualChannelOpen(context->vcm, WTS_CURRENT_SESSION,
|
|
"rdpsnd");
|
|
|
|
if (!priv->ChannelHandle)
|
|
{
|
|
WLog_ERR(TAG, "WTSVirtualChannelOpen failed!");
|
|
return ERROR_INTERNAL_ERROR;
|
|
}
|
|
|
|
if (!WTSVirtualChannelQuery(priv->ChannelHandle, WTSVirtualEventHandle, &buffer,
|
|
&bytesReturned) || (bytesReturned != sizeof(HANDLE)))
|
|
{
|
|
WLog_ERR(TAG,
|
|
"error during WTSVirtualChannelQuery(WTSVirtualEventHandle) or invalid returned size(%"PRIu32")",
|
|
bytesReturned);
|
|
|
|
if (buffer)
|
|
WTSFreeMemory(buffer);
|
|
|
|
goto out_close;
|
|
}
|
|
|
|
CopyMemory(&priv->channelEvent, buffer, sizeof(HANDLE));
|
|
WTSFreeMemory(buffer);
|
|
priv->rdpsnd_pdu = Stream_New(NULL, 4096);
|
|
|
|
if (!priv->rdpsnd_pdu)
|
|
{
|
|
WLog_ERR(TAG, "Stream_New failed!");
|
|
error = CHANNEL_RC_NO_MEMORY;
|
|
goto out_close;
|
|
}
|
|
|
|
if (!InitializeCriticalSectionEx(&context->priv->lock, 0, 0))
|
|
{
|
|
WLog_ERR(TAG, "InitializeCriticalSectionEx failed!");
|
|
goto out_pdu;
|
|
}
|
|
|
|
if (priv->ownThread)
|
|
{
|
|
context->priv->StopEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
|
|
|
|
if (!context->priv->StopEvent)
|
|
{
|
|
WLog_ERR(TAG, "CreateEvent failed!");
|
|
goto out_lock;
|
|
}
|
|
|
|
context->priv->Thread = CreateThread(NULL, 0,
|
|
rdpsnd_server_thread, (void*) context, 0, NULL);
|
|
|
|
if (!context->priv->Thread)
|
|
{
|
|
WLog_ERR(TAG, "CreateThread failed!");
|
|
goto out_stopEvent;
|
|
}
|
|
}
|
|
|
|
return CHANNEL_RC_OK;
|
|
out_stopEvent:
|
|
CloseHandle(context->priv->StopEvent);
|
|
context->priv->StopEvent = NULL;
|
|
out_lock:
|
|
DeleteCriticalSection(&context->priv->lock);
|
|
out_pdu:
|
|
Stream_Free(context->priv->rdpsnd_pdu, TRUE);
|
|
context->priv->rdpsnd_pdu = NULL;
|
|
out_close:
|
|
WTSVirtualChannelClose(context->priv->ChannelHandle);
|
|
context->priv->ChannelHandle = NULL;
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* Function description
|
|
*
|
|
* @return 0 on success, otherwise a Win32 error code
|
|
*/
|
|
static UINT rdpsnd_server_stop(RdpsndServerContext* context)
|
|
{
|
|
UINT error = CHANNEL_RC_OK;
|
|
|
|
if (context->priv->ownThread)
|
|
{
|
|
if (context->priv->StopEvent)
|
|
{
|
|
SetEvent(context->priv->StopEvent);
|
|
|
|
if (WaitForSingleObject(context->priv->Thread, INFINITE) == WAIT_FAILED)
|
|
{
|
|
error = GetLastError();
|
|
WLog_ERR(TAG, "WaitForSingleObject failed with error %"PRIu32"!", error);
|
|
return error;
|
|
}
|
|
|
|
CloseHandle(context->priv->Thread);
|
|
CloseHandle(context->priv->StopEvent);
|
|
}
|
|
}
|
|
|
|
DeleteCriticalSection(&context->priv->lock);
|
|
|
|
if (context->priv->rdpsnd_pdu)
|
|
Stream_Free(context->priv->rdpsnd_pdu, TRUE);
|
|
|
|
return error;
|
|
}
|
|
|
|
RdpsndServerContext* rdpsnd_server_context_new(HANDLE vcm)
|
|
{
|
|
RdpsndServerContext* context;
|
|
RdpsndServerPrivate* priv;
|
|
context = (RdpsndServerContext*)calloc(1, sizeof(RdpsndServerContext));
|
|
|
|
if (!context)
|
|
{
|
|
WLog_ERR(TAG, "calloc failed!");
|
|
return NULL;
|
|
}
|
|
|
|
context->vcm = vcm;
|
|
context->Start = rdpsnd_server_start;
|
|
context->Stop = rdpsnd_server_stop;
|
|
context->selected_client_format = -1;
|
|
context->Initialize = rdpsnd_server_initialize;
|
|
context->SelectFormat = rdpsnd_server_select_format;
|
|
context->SendSamples = rdpsnd_server_send_samples;
|
|
context->SetVolume = rdpsnd_server_set_volume;
|
|
context->Close = rdpsnd_server_close;
|
|
context->priv = priv = (RdpsndServerPrivate*)calloc(1,
|
|
sizeof(RdpsndServerPrivate));
|
|
|
|
if (!priv)
|
|
{
|
|
WLog_ERR(TAG, "calloc failed!");
|
|
goto out_free;
|
|
}
|
|
|
|
priv->dsp_context = freerdp_dsp_context_new(TRUE);
|
|
|
|
if (!priv->dsp_context)
|
|
{
|
|
WLog_ERR(TAG, "freerdp_dsp_context_new failed!");
|
|
goto out_free_priv;
|
|
}
|
|
|
|
priv->input_stream = Stream_New(NULL, 4);
|
|
|
|
if (!priv->input_stream)
|
|
{
|
|
WLog_ERR(TAG, "Stream_New failed!");
|
|
goto out_free_dsp;
|
|
}
|
|
|
|
priv->expectedBytes = 4;
|
|
priv->waitingHeader = TRUE;
|
|
priv->ownThread = TRUE;
|
|
return context;
|
|
out_free_dsp:
|
|
freerdp_dsp_context_free(priv->dsp_context);
|
|
out_free_priv:
|
|
free(context->priv);
|
|
out_free:
|
|
free(context);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
void rdpsnd_server_context_reset(RdpsndServerContext* context)
|
|
{
|
|
context->priv->expectedBytes = 4;
|
|
context->priv->waitingHeader = TRUE;
|
|
Stream_SetPosition(context->priv->input_stream, 0);
|
|
}
|
|
|
|
void rdpsnd_server_context_free(RdpsndServerContext* context)
|
|
{
|
|
if (context->priv->ChannelHandle)
|
|
WTSVirtualChannelClose(context->priv->ChannelHandle);
|
|
|
|
free(context->priv->out_buffer);
|
|
|
|
if (context->priv->dsp_context)
|
|
freerdp_dsp_context_free(context->priv->dsp_context);
|
|
|
|
if (context->priv->input_stream)
|
|
Stream_Free(context->priv->input_stream, TRUE);
|
|
|
|
free(context->client_formats);
|
|
free(context->priv);
|
|
free(context);
|
|
}
|
|
|
|
HANDLE rdpsnd_server_get_event_handle(RdpsndServerContext* context)
|
|
{
|
|
return context->priv->channelEvent;
|
|
}
|
|
|
|
/*
|
|
* Handle rpdsnd messages - server side
|
|
*
|
|
* @param Server side context
|
|
*
|
|
* @return 0 on success
|
|
* ERROR_NO_DATA if no data could be read this time
|
|
* otherwise error
|
|
*/
|
|
/**
|
|
* Function description
|
|
*
|
|
* @return 0 on success, otherwise a Win32 error code
|
|
*/
|
|
UINT rdpsnd_server_handle_messages(RdpsndServerContext* context)
|
|
{
|
|
DWORD bytesReturned;
|
|
UINT ret = CHANNEL_RC_OK;
|
|
RdpsndServerPrivate* priv = context->priv;
|
|
wStream* s = priv->input_stream;
|
|
|
|
if (!WTSVirtualChannelRead(priv->ChannelHandle, 0, (PCHAR)Stream_Pointer(s),
|
|
priv->expectedBytes, &bytesReturned))
|
|
{
|
|
if (GetLastError() == ERROR_NO_DATA)
|
|
return ERROR_NO_DATA;
|
|
|
|
WLog_ERR(TAG, "channel connection closed");
|
|
return ERROR_INTERNAL_ERROR;
|
|
}
|
|
|
|
priv->expectedBytes -= bytesReturned;
|
|
Stream_Seek(s, bytesReturned);
|
|
|
|
if (priv->expectedBytes)
|
|
return CHANNEL_RC_OK;
|
|
|
|
Stream_SealLength(s);
|
|
Stream_SetPosition(s, 0);
|
|
|
|
if (priv->waitingHeader)
|
|
{
|
|
/* header case */
|
|
Stream_Read_UINT8(s, priv->msgType);
|
|
Stream_Seek_UINT8(s); /* bPad */
|
|
Stream_Read_UINT16(s, priv->expectedBytes);
|
|
priv->waitingHeader = FALSE;
|
|
Stream_SetPosition(s, 0);
|
|
|
|
if (priv->expectedBytes)
|
|
{
|
|
if (!Stream_EnsureCapacity(s, priv->expectedBytes))
|
|
{
|
|
WLog_ERR(TAG, "Stream_EnsureCapacity failed!");
|
|
return CHANNEL_RC_NO_MEMORY;
|
|
}
|
|
|
|
return CHANNEL_RC_OK;
|
|
}
|
|
}
|
|
|
|
/* when here we have the header + the body */
|
|
#ifdef WITH_DEBUG_SND
|
|
WLog_DBG(TAG, "message type %"PRIu8"", priv->msgType);
|
|
#endif
|
|
priv->expectedBytes = 4;
|
|
priv->waitingHeader = TRUE;
|
|
|
|
switch (priv->msgType)
|
|
{
|
|
case SNDC_WAVECONFIRM:
|
|
ret = rdpsnd_server_recv_waveconfirm(context, s);
|
|
break;
|
|
|
|
case SNDC_FORMATS:
|
|
ret = rdpsnd_server_recv_formats(context, s);
|
|
|
|
if ((ret == CHANNEL_RC_OK) && (context->clientVersion < CHANNEL_VERSION_WIN_7))
|
|
IFCALL(context->Activated, context);
|
|
|
|
break;
|
|
|
|
case SNDC_QUALITYMODE:
|
|
ret = rdpsnd_server_recv_quality_mode(context, s);
|
|
Stream_SetPosition(s,
|
|
0); /* in case the Activated callback tries to treat some messages */
|
|
|
|
if ((ret == CHANNEL_RC_OK) && (context->clientVersion >= CHANNEL_VERSION_WIN_7))
|
|
IFCALL(context->Activated, context);
|
|
|
|
break;
|
|
|
|
default:
|
|
WLog_ERR(TAG, "UNKNOWN MESSAGE TYPE!! (0x%02"PRIX8")", priv->msgType);
|
|
ret = ERROR_INVALID_DATA;
|
|
break;
|
|
}
|
|
|
|
Stream_SetPosition(s, 0);
|
|
return ret;
|
|
}
|