/**

 * FreeRDP: A Remote Desktop Protocol Implementation

 *

 * Copyright 2014 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 "shadow.h"

#include "shadow_encoder.h"

int shadow_encoder_preferred_fps(rdpShadowEncoder* encoder)

{

	/* Return preferred fps calculated according to the last

	 * sent frame id and last client-acknowledged frame id.

	 */

	return encoder->fps;

}

UINT32 shadow_encoder_inflight_frames(rdpShadowEncoder* encoder)

{

	/* Return inflight frame count.

	 * If queueDepth is SUSPEND_FRAME_ACKNOWLEDGEMENT, count = 0

	 * Otherwise, calculate count =

	 * <last sent frame id> - <last client-acknowledged frame id>

	 * Note: This function is exported so that subsystem could

	 * implement its own strategy to tune fps.

	 */

	return (encoder->queueDepth == SUSPEND_FRAME_ACKNOWLEDGEMENT) ? 0 : encoder->frameId -

	       encoder->lastAckframeId;

}

UINT32 shadow_encoder_create_frame_id(rdpShadowEncoder* encoder)

{

	UINT32 frameId;

	int inFlightFrames;

	inFlightFrames = shadow_encoder_inflight_frames(encoder);

	/*

	 * Calculate preferred fps according to how much frames are

	 * in-progress. Note that it only works when subsytem implementation

	 * calls shadow_encoder_preferred_fps and takes the suggestion.

	 */

	if (inFlightFrames > 1)

	{

		encoder->fps = (100 / (inFlightFrames + 1) * encoder->maxFps) / 100;

	}

	else

	{

		encoder->fps += 2;

		if (encoder->fps > encoder->maxFps)

			encoder->fps = encoder->maxFps;

	}

	if (encoder->fps < 1)

		encoder->fps = 1;

	frameId = ++encoder->frameId;

	return frameId;

}

static int shadow_encoder_init_grid(rdpShadowEncoder* encoder)

{

	int i, j, k;

	int tileSize;

	int tileCount;

	encoder->gridWidth = ((encoder->width + (encoder->maxTileWidth - 1)) /

	                      encoder->maxTileWidth);

	encoder->gridHeight = ((encoder->height + (encoder->maxTileHeight - 1)) /

	                       encoder->maxTileHeight);

	tileSize = encoder->maxTileWidth * encoder->maxTileHeight * 4;

	tileCount = encoder->gridWidth * encoder->gridHeight;

	encoder->gridBuffer = (BYTE*) calloc(tileSize, tileCount);

	if (!encoder->gridBuffer)

		return -1;

	encoder->grid = (BYTE**) calloc(tileCount, sizeof(BYTE*));

	if (!encoder->grid)

		return -1;

	for (i = 0; i < encoder->gridHeight; i++)

	{

		for (j = 0; j < encoder->gridWidth; j++)

		{

			k = (i * encoder->gridWidth) + j;

			encoder->grid[k] = &(encoder->gridBuffer[k * tileSize]);

		}

	}

	return 0;

}

static int shadow_encoder_uninit_grid(rdpShadowEncoder* encoder)

{

	if (encoder->gridBuffer)

	{

		free(encoder->gridBuffer);

		encoder->gridBuffer = NULL;

	}

	if (encoder->grid)

	{

		free(encoder->grid);

		encoder->grid = NULL;

	}

	encoder->gridWidth = 0;

	encoder->gridHeight = 0;

	return 0;

}

static int shadow_encoder_init_rfx(rdpShadowEncoder* encoder)

{

	if (!encoder->rfx)

		encoder->rfx = rfx_context_new(TRUE);

	if (!encoder->rfx)

		goto fail;

	if (!rfx_context_reset(encoder->rfx, encoder->width, encoder->height))

		goto fail;

	encoder->rfx->mode = encoder->server->rfxMode;

	rfx_context_set_pixel_format(encoder->rfx, PIXEL_FORMAT_BGRX32);

	encoder->codecs |= FREERDP_CODEC_REMOTEFX;

	return 1;

fail:

	rfx_context_free(encoder->rfx);

	return -1;

}

static int shadow_encoder_init_nsc(rdpShadowEncoder* encoder)

{

	rdpContext* context = (rdpContext*) encoder->client;

	rdpSettings* settings = context->settings;

	if (!encoder->nsc)

		encoder->nsc = nsc_context_new();

	if (!encoder->nsc)

		goto fail;

	if (!nsc_context_reset(encoder->nsc, encoder->width, encoder->height))

		goto fail;

	encoder->nsc->ColorLossLevel = settings->NSCodecColorLossLevel;

	encoder->nsc->ChromaSubsamplingLevel = settings->NSCodecAllowSubsampling ? 1 :

	                                       0;

	encoder->nsc->DynamicColorFidelity = settings->NSCodecAllowDynamicColorFidelity;

	nsc_context_set_pixel_format(encoder->nsc, PIXEL_FORMAT_BGRX32);

	encoder->codecs |= FREERDP_CODEC_NSCODEC;

	return 1;

fail:

	nsc_context_free(encoder->nsc);

	return -1;

}

static int shadow_encoder_init_planar(rdpShadowEncoder* encoder)

{

	DWORD planarFlags = 0;

	rdpContext* context = (rdpContext*) encoder->client;

	rdpSettings* settings = context->settings;

	if (settings->DrawAllowSkipAlpha)

		planarFlags |= PLANAR_FORMAT_HEADER_NA;

	planarFlags |= PLANAR_FORMAT_HEADER_RLE;

	if (!encoder->planar)

	{

		encoder->planar = freerdp_bitmap_planar_context_new(planarFlags,

		                  encoder->maxTileWidth, encoder->maxTileHeight);

	}

	if (!encoder->planar)

		goto fail;

	if (!freerdp_bitmap_planar_context_reset(encoder->planar,

	        encoder->maxTileWidth,

	        encoder->maxTileHeight))

		goto fail;

	encoder->codecs |= FREERDP_CODEC_PLANAR;

	return 1;

fail:

	freerdp_bitmap_planar_context_free(encoder->planar);

	return -1;

}

static int shadow_encoder_init_interleaved(rdpShadowEncoder* encoder)

{

	if (!encoder->interleaved)

		encoder->interleaved = bitmap_interleaved_context_new(TRUE);

	if (!encoder->interleaved)

		goto fail;

	if (!bitmap_interleaved_context_reset(encoder->interleaved))

		goto fail;

	encoder->codecs |= FREERDP_CODEC_INTERLEAVED;

	return 1;

fail:

	bitmap_interleaved_context_free(encoder->interleaved);

	return -1;

}

static int shadow_encoder_init_h264(rdpShadowEncoder* encoder)

{

	if (!encoder->h264)

		encoder->h264 = h264_context_new(TRUE);

	if (!encoder->h264)

		goto fail;

	if (!h264_context_reset(encoder->h264, encoder->width, encoder->height))

		goto fail;

	encoder->h264->RateControlMode = encoder->server->h264RateControlMode;

	encoder->h264->BitRate = encoder->server->h264BitRate;

	encoder->h264->FrameRate = encoder->server->h264FrameRate;

	encoder->h264->QP = encoder->server->h264QP;

	encoder->codecs |= FREERDP_CODEC_AVC420 | FREERDP_CODEC_AVC444;

	return 1;

fail:

	h264_context_free(encoder->h264);

	return -1;

}

static int shadow_encoder_init(rdpShadowEncoder* encoder)

{

	encoder->width = encoder->server->screen->width;

	encoder->height = encoder->server->screen->height;

	encoder->maxTileWidth = 64;

	encoder->maxTileHeight = 64;

	shadow_encoder_init_grid(encoder);

	if (!encoder->bs)

		encoder->bs = Stream_New(NULL,

		                         encoder->maxTileWidth * encoder->maxTileHeight * 4);

	if (!encoder->bs)

		return -1;

	return 1;

}

static int shadow_encoder_uninit_rfx(rdpShadowEncoder* encoder)

{

	if (encoder->rfx)

	{

		rfx_context_free(encoder->rfx);

		encoder->rfx = NULL;

	}

	encoder->codecs &= ~FREERDP_CODEC_REMOTEFX;

	return 1;

}

static int shadow_encoder_uninit_nsc(rdpShadowEncoder* encoder)

{

	if (encoder->nsc)

	{

		nsc_context_free(encoder->nsc);

		encoder->nsc = NULL;

	}

	encoder->codecs &= ~FREERDP_CODEC_NSCODEC;

	return 1;

}

static int shadow_encoder_uninit_planar(rdpShadowEncoder* encoder)

{

	if (encoder->planar)

	{

		freerdp_bitmap_planar_context_free(encoder->planar);

		encoder->planar = NULL;

	}

	encoder->codecs &= ~FREERDP_CODEC_PLANAR;

	return 1;

}

static int shadow_encoder_uninit_interleaved(rdpShadowEncoder* encoder)

{

	if (encoder->interleaved)

	{

		bitmap_interleaved_context_free(encoder->interleaved);

		encoder->interleaved = NULL;

	}

	encoder->codecs &= ~FREERDP_CODEC_INTERLEAVED;

	return 1;

}

static int shadow_encoder_uninit_h264(rdpShadowEncoder* encoder)

{

	if (encoder->h264)

	{

		h264_context_free(encoder->h264);

		encoder->h264 = NULL;

	}

	encoder->codecs &= ~(FREERDP_CODEC_AVC420 | FREERDP_CODEC_AVC444);

	return 1;

}

static int shadow_encoder_uninit(rdpShadowEncoder* encoder)

{

	shadow_encoder_uninit_grid(encoder);

	if (encoder->bs)

	{

		Stream_Free(encoder->bs, TRUE);

		encoder->bs = NULL;

	}

	if (encoder->codecs & FREERDP_CODEC_REMOTEFX)

	{

		shadow_encoder_uninit_rfx(encoder);

	}

	if (encoder->codecs & FREERDP_CODEC_NSCODEC)

	{

		shadow_encoder_uninit_nsc(encoder);

	}

	if (encoder->codecs & FREERDP_CODEC_PLANAR)

	{

		shadow_encoder_uninit_planar(encoder);

	}

	if (encoder->codecs & FREERDP_CODEC_INTERLEAVED)

	{

		shadow_encoder_uninit_interleaved(encoder);

	}

	if (encoder->codecs & (FREERDP_CODEC_AVC420 | FREERDP_CODEC_AVC444))

	{

		shadow_encoder_uninit_h264(encoder);

	}

	return 1;

}

int shadow_encoder_reset(rdpShadowEncoder* encoder)

{

	int status;

	UINT32 codecs = encoder->codecs;

	rdpContext* context = (rdpContext*) encoder->client;

	rdpSettings* settings = context->settings;

	status = shadow_encoder_uninit(encoder);

	if (status < 0)

		return -1;

	status = shadow_encoder_init(encoder);

	if (status < 0)

		return -1;

	status = shadow_encoder_prepare(encoder, codecs);

	if (status < 0)

		return -1;

	encoder->fps = 16;

	encoder->maxFps = 32;

	encoder->frameId = 0;

	encoder->lastAckframeId = 0;

	encoder->frameAck = settings->SurfaceFrameMarkerEnabled;

	return 1;

}

int shadow_encoder_prepare(rdpShadowEncoder* encoder, UINT32 codecs)

{

	int status;

	if ((codecs & FREERDP_CODEC_REMOTEFX)

	    && !(encoder->codecs & FREERDP_CODEC_REMOTEFX))

	{

		status = shadow_encoder_init_rfx(encoder);

		if (status < 0)

			return -1;

	}

	if ((codecs & FREERDP_CODEC_NSCODEC)

	    && !(encoder->codecs & FREERDP_CODEC_NSCODEC))

	{

		status = shadow_encoder_init_nsc(encoder);

		if (status < 0)

			return -1;

	}

	if ((codecs & FREERDP_CODEC_PLANAR)

	    && !(encoder->codecs & FREERDP_CODEC_PLANAR))

	{

		status = shadow_encoder_init_planar(encoder);

		if (status < 0)

			return -1;

	}

	if ((codecs & FREERDP_CODEC_INTERLEAVED)

	    && !(encoder->codecs & FREERDP_CODEC_INTERLEAVED))

	{

		status = shadow_encoder_init_interleaved(encoder);

		if (status < 0)

			return -1;

	}

	if ((codecs & (FREERDP_CODEC_AVC420 | FREERDP_CODEC_AVC444))

	    && !(encoder->codecs & (FREERDP_CODEC_AVC420 | FREERDP_CODEC_AVC444)))

	{

		status = shadow_encoder_init_h264(encoder);

		if (status < 0)

			return -1;

	}

	return 1;

}

rdpShadowEncoder* shadow_encoder_new(rdpShadowClient* client)

{

	rdpShadowEncoder* encoder;

	rdpShadowServer* server = client->server;

	encoder = (rdpShadowEncoder*) calloc(1, sizeof(rdpShadowEncoder));

	if (!encoder)

		return NULL;

	encoder->client = client;

	encoder->server = server;

	encoder->fps = 16;

	encoder->maxFps = 32;

	if (shadow_encoder_init(encoder) < 0)

	{

		free(encoder);

		return NULL;

	}

	return encoder;

}

void shadow_encoder_free(rdpShadowEncoder* encoder)

{

	if (!encoder)

		return;

	shadow_encoder_uninit(encoder);

	free(encoder);

}