FreeRDP/server/Windows/wf_peer.c

/**
 * FreeRDP: A Remote Desktop Protocol Client
 * FreeRDP Windows Server
 *
 * Copyright 2012 Marc-Andre Moreau <marcandre.moreau@gmail.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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <winpr/tchar.h>
#include <winpr/windows.h>

#include <freerdp/listener.h>
#include <freerdp/utils/sleep.h>
#include <freerdp/codec/rfx.h>
#include <freerdp/utils/stream.h>

#include "wf_mirage.h"

#include "wf_peer.h"

void wf_peer_context_new(freerdp_peer* client, wfPeerContext* context)
{
#ifndef WITH_WIN8
	wfInfoSingleton = wf_info_init(wfInfoSingleton);
	wf_info_mirror_init(wfInfoSingleton, context);
#endif
}

void wf_peer_context_free(freerdp_peer* client, wfPeerContext* context)
{
#ifndef WITH_WIN8
	wf_info_subscriber_release(wfInfoSingleton, context);
#endif
}

static DWORD WINAPI wf_peer_mirror_monitor(LPVOID lpParam)
{
	DWORD start, end, diff;
	DWORD rate;
	
	freerdp_peer* client;

	rate = 42;
	client = (freerdp_peer*)lpParam;
	
	//todo: make sure we dont encode after no clients
	while(1)
	{

		start = GetTickCount();


		if(wf_info_has_subscribers(wfInfoSingleton))
		{
			wf_info_update_changes(wfInfoSingleton);
			if(wf_info_have_updates(wfInfoSingleton))
			{
				//wf_info_find_invalid_region(wfInfoSingleton);
				//printf("Fake Encode!\n");
				wf_rfx_encode(client);
			}			
		}

		end = GetTickCount();
		diff = end - start;
		if(diff < rate)
		{
			//printf("sleeping for %d ms...\n", rate - diff);
			Sleep(rate - diff);
		}
		
	}

	_tprintf(_T("monitor thread terminating...\n"));
	wf_info_set_thread_count(wfInfoSingleton, wf_info_get_thread_count(wfInfoSingleton) - 1 );
	return 0;
}

void wf_rfx_encode(freerdp_peer* client)
{
	STREAM* s;
	wfInfo* wfi;
	RFX_RECT rect;
	rdpUpdate* update;
	wfPeerContext* wfp;
	SURFACE_BITS_COMMAND* cmd;
	GETCHANGESBUF* buf;
	long height, width;
	long offset;
	int dRes;
	
	wfp = (wfPeerContext*) client->context;

	dRes = WaitForSingleObject(wfInfoSingleton->encodeMutex, INFINITE);
	switch(dRes)
	{
	case WAIT_OBJECT_0:

		wf_info_find_invalid_region(wfInfoSingleton);

		if( (wfp->activated == false) ||
			(wf_info_has_subscribers(wfInfoSingleton) == false) ||
			!wf_info_have_invalid_region(wfInfoSingleton) ||
			(wfInfoSingleton->enc_data == true) )
		{
			ReleaseMutex(wfInfoSingleton->encodeMutex);
			break;
		}

		update = client->update;
		cmd = &update->surface_bits_command;
		wfi = wfp->wfInfo;
		buf = (GETCHANGESBUF*)wfi->changeBuffer;

		//printf("encode %d\n", wfi->nextUpdate - wfi->lastUpdate);
		//printf("\tinvlaid region = (%d, %d), (%d, %d)\n", wfi->invalid_x1, wfi->invalid_y1, wfi->invalid_x2, wfi->invalid_y2);

		width = wfi->invalid_x2 - wfi->invalid_x1;
		height = wfi->invalid_y2 - wfi->invalid_y1;

		stream_clear(wfp->s);
		stream_set_pos(wfp->s, 0);
		s = wfp->s;
		
		rect.x = 0;
		rect.y = 0;
		rect.width = (uint16) width;
		rect.height = (uint16) height;

		offset = (4 * wfi->invalid_x1) + (wfi->invalid_y1 * wfi->width * 4);

		//printf("width = %d, height = %d\n", width, height);
		rfx_compose_message(wfp->rfx_context, s, &rect, 1,
				((uint8*) (buf->Userbuffer)) + offset, width, height, wfi->width * 4);

		cmd->destLeft = wfi->invalid_x1;
		cmd->destTop = wfi->invalid_y1;
		cmd->destRight = wfi->invalid_x1 + width;
		cmd->destBottom = wfi->invalid_y1 + height;


		cmd->bpp = 32;
		cmd->codecID = client->settings->rfx_codec_id;
		cmd->width = width;
		cmd->height = height;
		cmd->bitmapDataLength = stream_get_length(s);
		cmd->bitmapData = stream_get_head(s);

		wfi->enc_data = true;
		ReleaseMutex(wfInfoSingleton->encodeMutex);
		break;

	case WAIT_TIMEOUT:

		ReleaseMutex(wfInfoSingleton->encodeMutex);
		break;

	case WAIT_ABANDONED:

		printf("\n\nwf_rfx_encode: Got ownership of abandoned mutex... releasing...\n", dRes);
		ReleaseMutex(wfInfoSingleton->encodeMutex);
		break;
	default: 
        printf("\n\nwf_rfx_encode: Something else happened!!! dRes = %d\n", dRes);
	}

}

void wf_peer_init(freerdp_peer* client)
{
	client->context_size = sizeof(wfPeerContext);
	client->ContextNew = (psPeerContextNew) wf_peer_context_new;
	client->ContextFree = (psPeerContextFree) wf_peer_context_free;
	freerdp_peer_context_new(client);

#ifndef WITH_WIN8
	if (!wf_info_get_thread_count(wfInfoSingleton))
	{
		_tprintf(_T("Trying to create a monitor thread...\n"));

		if (CreateThread(NULL, 0, wf_peer_mirror_monitor, client, 0, NULL) != 0)
			_tprintf(_T("Created!\n"));

		wf_info_set_thread_count(wfInfoSingleton, wf_info_get_thread_count(wfInfoSingleton) + 1 );
	}
#endif
}

boolean wf_peer_post_connect(freerdp_peer* client)
{
	wfPeerContext* context = (wfPeerContext*) client->context;

	/**
	 * This callback is called when the entire connection sequence is done, i.e. we've received the
	 * Font List PDU from the client and sent out the Font Map PDU.
	 * The server may start sending graphics output and receiving keyboard/mouse input after this
	 * callback returns.
	 */

	printf("Client %s is activated (osMajorType %d osMinorType %d)", client->local ? "(local)" : client->hostname,
		client->settings->os_major_type, client->settings->os_minor_type);

	if (client->settings->autologon)
	{
		printf(" and wants to login automatically as %s\\%s",
			client->settings->domain ? client->settings->domain : "",
			client->settings->username);

		/* A real server may perform OS login here if NLA is not executed previously. */
	}
	printf("\n");

	printf("Client requested desktop: %dx%dx%d\n",
		client->settings->width, client->settings->height, client->settings->color_depth);

	printf("But we will try resizing to %dx%d\n",
		wf_info_get_width(wfInfoSingleton),
		wf_info_get_height(wfInfoSingleton)
		);

	client->settings->width = wf_info_get_width(wfInfoSingleton);
	client->settings->height = wf_info_get_height(wfInfoSingleton);

	client->update->DesktopResize(client->update->context);

	return true;
}

boolean wf_peer_activate(freerdp_peer* client)
{
	wfPeerContext* context = (wfPeerContext*) client->context;

	context->activated = true;

	return true;
}

void wf_peer_synchronize_event(rdpInput* input, uint32 flags)
{

}

void wf_peer_send_changes(rdpUpdate* update)
{
	int dRes;

	//are we currently encoding?
	dRes = WaitForSingleObject(wfInfoSingleton->encodeMutex, 0);
	switch(dRes)
	{
	case WAIT_OBJECT_0:
		//are there changes to send?
		if( !wf_info_have_updates(wfInfoSingleton) || !wf_info_have_invalid_region(wfInfoSingleton) || (wfInfoSingleton->enc_data == false) )
		{
			ReleaseMutex(wfInfoSingleton->encodeMutex);
			break;
		}
			

		wf_info_updated(wfInfoSingleton);
		/*
		printf("\tSend...");
		printf("\t(%d, %d), (%d, %d) [%dx%d]\n",
			update->surface_bits_command.destLeft, update->surface_bits_command.destTop,
			update->surface_bits_command.destRight, update->surface_bits_command.destBottom,
			update->surface_bits_command.width, update->surface_bits_command.height);
			*/
		update->SurfaceBits(update->context, &update->surface_bits_command);
		//wf_info_clear_invalid_region(wfInfoSingleton);
		wfInfoSingleton->enc_data = false;
		ReleaseMutex(wfInfoSingleton->encodeMutex);
		break;

	case WAIT_TIMEOUT:
		break;


	default: 
        printf("wf_peer_send_changes: Something else happened!!! dRes = %d\n", dRes);
	}

	
}