546 lines
14 KiB
C
546 lines
14 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* NSCodec Encoder
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*
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* Copyright 2012 Vic Lee
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* Copyright 2016 Armin Novak <armin.novak@thincast.com>
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* Copyright 2016 Thincast Technologies GmbH
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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 <freerdp/codec/nsc.h>
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#include <freerdp/codec/color.h>
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#include "nsc_types.h"
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#include "nsc_encode.h"
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struct _NSC_MESSAGE
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{
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UINT32 x;
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UINT32 y;
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UINT32 width;
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UINT32 height;
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const BYTE* data;
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UINT32 scanline;
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BYTE* PlaneBuffer;
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UINT32 MaxPlaneSize;
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BYTE* PlaneBuffers[5];
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UINT32 OrgByteCount[4];
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UINT32 LumaPlaneByteCount;
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UINT32 OrangeChromaPlaneByteCount;
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UINT32 GreenChromaPlaneByteCount;
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UINT32 AlphaPlaneByteCount;
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UINT8 ColorLossLevel;
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UINT8 ChromaSubsamplingLevel;
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};
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typedef struct _NSC_MESSAGE NSC_MESSAGE;
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static BOOL nsc_write_message(NSC_CONTEXT* context, wStream* s,
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const NSC_MESSAGE* message);
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static BOOL nsc_context_initialize_encode(NSC_CONTEXT* context)
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{
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int i;
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UINT32 length;
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UINT32 tempWidth;
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UINT32 tempHeight;
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tempWidth = ROUND_UP_TO(context->width, 8);
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tempHeight = ROUND_UP_TO(context->height, 2);
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/* The maximum length a decoded plane can reach in all cases */
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length = tempWidth * tempHeight + 16;
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if (length > context->priv->PlaneBuffersLength)
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{
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for (i = 0; i < 5; i++)
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{
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BYTE* tmp = (BYTE*) realloc(context->priv->PlaneBuffers[i], length);
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if (!tmp)
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goto fail;
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context->priv->PlaneBuffers[i] = tmp;
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}
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context->priv->PlaneBuffersLength = length;
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}
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if (context->ChromaSubsamplingLevel)
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{
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context->OrgByteCount[0] = tempWidth * context->height;
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context->OrgByteCount[1] = tempWidth * tempHeight / 4;
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context->OrgByteCount[2] = tempWidth * tempHeight / 4;
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context->OrgByteCount[3] = context->width * context->height;
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}
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else
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{
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context->OrgByteCount[0] = context->width * context->height;
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context->OrgByteCount[1] = context->width * context->height;
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context->OrgByteCount[2] = context->width * context->height;
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context->OrgByteCount[3] = context->width * context->height;
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}
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return TRUE;
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fail:
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if (length > context->priv->PlaneBuffersLength)
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{
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for (i = 0; i < 5; i++)
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free(context->priv->PlaneBuffers[i]);
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}
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return FALSE;
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}
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static BOOL nsc_encode_argb_to_aycocg(NSC_CONTEXT* context, const BYTE* data,
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UINT32 scanline)
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{
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UINT16 x;
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UINT16 y;
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UINT16 rw;
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BYTE ccl;
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const BYTE* src;
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BYTE* yplane = NULL;
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BYTE* coplane = NULL;
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BYTE* cgplane = NULL;
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BYTE* aplane = NULL;
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INT16 r_val;
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INT16 g_val;
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INT16 b_val;
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BYTE a_val;
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UINT32 tempWidth;
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tempWidth = ROUND_UP_TO(context->width, 8);
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rw = (context->ChromaSubsamplingLevel ? tempWidth : context->width);
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ccl = context->ColorLossLevel;
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for (y = 0; y < context->height; y++)
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{
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src = data + (context->height - 1 - y) * scanline;
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yplane = context->priv->PlaneBuffers[0] + y * rw;
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coplane = context->priv->PlaneBuffers[1] + y * rw;
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cgplane = context->priv->PlaneBuffers[2] + y * rw;
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aplane = context->priv->PlaneBuffers[3] + y * context->width;
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for (x = 0; x < context->width; x++)
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{
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switch (context->format)
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{
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case PIXEL_FORMAT_BGRX32:
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b_val = *src++;
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g_val = *src++;
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r_val = *src++;
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src++;
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a_val = 0xFF;
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break;
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case PIXEL_FORMAT_BGRA32:
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b_val = *src++;
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g_val = *src++;
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r_val = *src++;
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a_val = *src++;
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break;
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case PIXEL_FORMAT_RGBX32:
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r_val = *src++;
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g_val = *src++;
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b_val = *src++;
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src++;
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a_val = 0xFF;
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break;
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case PIXEL_FORMAT_RGBA32:
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r_val = *src++;
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g_val = *src++;
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b_val = *src++;
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a_val = *src++;
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break;
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case PIXEL_FORMAT_BGR24:
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b_val = *src++;
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g_val = *src++;
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r_val = *src++;
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a_val = 0xFF;
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break;
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case PIXEL_FORMAT_RGB24:
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r_val = *src++;
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g_val = *src++;
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b_val = *src++;
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a_val = 0xFF;
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break;
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case PIXEL_FORMAT_BGR16:
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b_val = (INT16)(((*(src + 1)) & 0xF8) | ((*(src + 1)) >> 5));
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g_val = (INT16)((((*(src + 1)) & 0x07) << 5) | (((*src) & 0xE0) >> 3));
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r_val = (INT16)((((*src) & 0x1F) << 3) | (((*src) >> 2) & 0x07));
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a_val = 0xFF;
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src += 2;
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break;
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case PIXEL_FORMAT_RGB16:
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r_val = (INT16)(((*(src + 1)) & 0xF8) | ((*(src + 1)) >> 5));
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g_val = (INT16)((((*(src + 1)) & 0x07) << 5) | (((*src) & 0xE0) >> 3));
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b_val = (INT16)((((*src) & 0x1F) << 3) | (((*src) >> 2) & 0x07));
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a_val = 0xFF;
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src += 2;
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break;
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case PIXEL_FORMAT_A4:
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{
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int shift;
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BYTE idx;
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shift = (7 - (x % 8));
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idx = ((*src) >> shift) & 1;
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idx |= (((*(src + 1)) >> shift) & 1) << 1;
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idx |= (((*(src + 2)) >> shift) & 1) << 2;
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idx |= (((*(src + 3)) >> shift) & 1) << 3;
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idx *= 3;
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r_val = (INT16) context->palette[idx];
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g_val = (INT16) context->palette[idx + 1];
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b_val = (INT16) context->palette[idx + 2];
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if (shift == 0)
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src += 4;
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}
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a_val = 0xFF;
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break;
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case PIXEL_FORMAT_RGB8:
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{
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int idx = (*src) * 3;
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r_val = (INT16) context->palette[idx];
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g_val = (INT16) context->palette[idx + 1];
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b_val = (INT16) context->palette[idx + 2];
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src++;
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}
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a_val = 0xFF;
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break;
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default:
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r_val = g_val = b_val = a_val = 0;
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break;
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}
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*yplane++ = (BYTE)((r_val >> 2) + (g_val >> 1) + (b_val >> 2));
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/* Perform color loss reduction here */
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*coplane++ = (BYTE)((r_val - b_val) >> ccl);
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*cgplane++ = (BYTE)((-(r_val >> 1) + g_val - (b_val >> 1)) >> ccl);
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*aplane++ = a_val;
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}
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if (context->ChromaSubsamplingLevel && (x % 2) == 1)
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{
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*yplane = *(yplane - 1);
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*coplane = *(coplane - 1);
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*cgplane = *(cgplane - 1);
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}
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}
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if (context->ChromaSubsamplingLevel && (y % 2) == 1)
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{
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yplane = context->priv->PlaneBuffers[0] + y * rw;
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coplane = context->priv->PlaneBuffers[1] + y * rw;
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cgplane = context->priv->PlaneBuffers[2] + y * rw;
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CopyMemory(yplane, yplane - rw, rw);
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CopyMemory(coplane, coplane - rw, rw);
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CopyMemory(cgplane, cgplane - rw, rw);
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}
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return TRUE;
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}
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static BOOL nsc_encode_subsampling(NSC_CONTEXT* context)
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{
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UINT16 x;
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UINT16 y;
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UINT32 tempWidth;
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UINT32 tempHeight;
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if (!context)
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return FALSE;
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tempWidth = ROUND_UP_TO(context->width, 8);
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tempHeight = ROUND_UP_TO(context->height, 2);
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if (tempHeight == 0)
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return FALSE;
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if (tempWidth > context->priv->PlaneBuffersLength / tempHeight)
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return FALSE;
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for (y = 0; y < tempHeight >> 1; y++)
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{
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BYTE* co_dst = context->priv->PlaneBuffers[1] + y * (tempWidth >> 1);
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BYTE* cg_dst = context->priv->PlaneBuffers[2] + y * (tempWidth >> 1);
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const INT8* co_src0 = (INT8*) context->priv->PlaneBuffers[1] + (y << 1) * tempWidth;
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const INT8* co_src1 = co_src0 + tempWidth;
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const INT8* cg_src0 = (INT8*) context->priv->PlaneBuffers[2] + (y << 1) * tempWidth;
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const INT8* cg_src1 = cg_src0 + tempWidth;
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for (x = 0; x < tempWidth >> 1; x++)
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{
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*co_dst++ = (BYTE)(((INT16) * co_src0 + (INT16) * (co_src0 + 1) +
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(INT16) * co_src1 + (INT16) * (co_src1 + 1)) >> 2);
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*cg_dst++ = (BYTE)(((INT16) * cg_src0 + (INT16) * (cg_src0 + 1) +
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(INT16) * cg_src1 + (INT16) * (cg_src1 + 1)) >> 2);
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co_src0 += 2;
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co_src1 += 2;
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cg_src0 += 2;
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cg_src1 += 2;
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}
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}
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return TRUE;
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}
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BOOL nsc_encode(NSC_CONTEXT* context, const BYTE* bmpdata, UINT32 rowstride)
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{
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if (!context || !bmpdata || (rowstride == 0))
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return FALSE;
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if (!nsc_encode_argb_to_aycocg(context, bmpdata, rowstride))
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return FALSE;
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if (context->ChromaSubsamplingLevel)
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{
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if (!nsc_encode_subsampling(context))
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return FALSE;
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}
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return TRUE;
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}
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static UINT32 nsc_rle_encode(const BYTE* in, BYTE* out, UINT32 originalSize)
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{
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UINT32 left;
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UINT32 runlength = 1;
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UINT32 planeSize = 0;
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left = originalSize;
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/**
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* We quit the loop if the running compressed size is larger than the original.
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* In such cases data will be sent uncompressed.
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*/
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while (left > 4 && planeSize < originalSize - 4)
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{
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if (left > 5 && *in == *(in + 1))
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{
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runlength++;
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}
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else if (runlength == 1)
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{
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*out++ = *in;
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planeSize++;
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}
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else if (runlength < 256)
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{
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*out++ = *in;
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*out++ = *in;
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*out++ = runlength - 2;
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runlength = 1;
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planeSize += 3;
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}
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else
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{
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*out++ = *in;
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*out++ = *in;
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*out++ = 0xFF;
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*out++ = (runlength & 0x000000FF);
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*out++ = (runlength & 0x0000FF00) >> 8;
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*out++ = (runlength & 0x00FF0000) >> 16;
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*out++ = (runlength & 0xFF000000) >> 24;
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runlength = 1;
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planeSize += 7;
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}
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in++;
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left--;
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}
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if (planeSize < originalSize - 4)
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CopyMemory(out, in, 4);
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planeSize += 4;
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return planeSize;
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}
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static void nsc_rle_compress_data(NSC_CONTEXT* context)
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{
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UINT16 i;
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UINT32 planeSize;
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UINT32 originalSize;
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for (i = 0; i < 4; i++)
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{
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originalSize = context->OrgByteCount[i];
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if (originalSize == 0)
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{
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planeSize = 0;
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}
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else
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{
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planeSize = nsc_rle_encode(context->priv->PlaneBuffers[i],
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context->priv->PlaneBuffers[4], originalSize);
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if (planeSize < originalSize)
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CopyMemory(context->priv->PlaneBuffers[i], context->priv->PlaneBuffers[4],
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planeSize);
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else
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planeSize = originalSize;
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}
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context->PlaneByteCount[i] = planeSize;
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}
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}
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UINT32 nsc_compute_byte_count(NSC_CONTEXT* context, UINT32* ByteCount,
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UINT32 width, UINT32 height)
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{
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UINT32 tempWidth;
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UINT32 tempHeight;
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UINT32 maxPlaneSize;
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tempWidth = ROUND_UP_TO(width, 8);
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tempHeight = ROUND_UP_TO(height, 2);
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maxPlaneSize = tempWidth * tempHeight + 16;
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if (context->ChromaSubsamplingLevel)
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{
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ByteCount[0] = tempWidth * height;
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ByteCount[1] = tempWidth * tempHeight / 4;
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ByteCount[2] = tempWidth * tempHeight / 4;
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ByteCount[3] = width * height;
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}
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else
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{
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ByteCount[0] = width * height;
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ByteCount[1] = width * height;
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ByteCount[2] = width * height;
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ByteCount[3] = width * height;
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}
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return maxPlaneSize;
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}
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BOOL nsc_write_message(NSC_CONTEXT* context, wStream* s, const NSC_MESSAGE* message)
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{
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UINT32 totalPlaneByteCount;
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totalPlaneByteCount = message->LumaPlaneByteCount +
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message->OrangeChromaPlaneByteCount +
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message->GreenChromaPlaneByteCount + message->AlphaPlaneByteCount;
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if (!Stream_EnsureRemainingCapacity(s, 20 + totalPlaneByteCount))
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return FALSE;
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Stream_Write_UINT32(s,
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message->LumaPlaneByteCount); /* LumaPlaneByteCount (4 bytes) */
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Stream_Write_UINT32(s,
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message->OrangeChromaPlaneByteCount); /* OrangeChromaPlaneByteCount (4 bytes) */
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Stream_Write_UINT32(s,
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message->GreenChromaPlaneByteCount); /* GreenChromaPlaneByteCount (4 bytes) */
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Stream_Write_UINT32(s,
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message->AlphaPlaneByteCount); /* AlphaPlaneByteCount (4 bytes) */
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Stream_Write_UINT8(s, message->ColorLossLevel); /* ColorLossLevel (1 byte) */
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Stream_Write_UINT8(s,
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message->ChromaSubsamplingLevel); /* ChromaSubsamplingLevel (1 byte) */
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Stream_Write_UINT16(s, 0); /* Reserved (2 bytes) */
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if (message->LumaPlaneByteCount)
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Stream_Write(s, message->PlaneBuffers[0],
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message->LumaPlaneByteCount); /* LumaPlane */
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if (message->OrangeChromaPlaneByteCount)
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Stream_Write(s, message->PlaneBuffers[1],
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message->OrangeChromaPlaneByteCount); /* OrangeChromaPlane */
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if (message->GreenChromaPlaneByteCount)
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Stream_Write(s, message->PlaneBuffers[2],
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message->GreenChromaPlaneByteCount); /* GreenChromaPlane */
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if (message->AlphaPlaneByteCount)
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Stream_Write(s, message->PlaneBuffers[3],
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message->AlphaPlaneByteCount); /* AlphaPlane */
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return TRUE;
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}
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BOOL nsc_compose_message(NSC_CONTEXT* context, wStream* s, const BYTE* data,
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UINT32 width, UINT32 height, UINT32 scanline)
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{
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BOOL rc;
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NSC_MESSAGE message = { 0 };
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if (!context || !s || !data)
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return FALSE;
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context->width = width;
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context->height = height;
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if (!nsc_context_initialize_encode(context))
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return FALSE;
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/* ARGB to AYCoCg conversion, chroma subsampling and colorloss reduction */
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PROFILER_ENTER(context->priv->prof_nsc_encode)
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rc = context->encode(context, data, scanline);
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PROFILER_EXIT(context->priv->prof_nsc_encode)
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if (!rc)
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return FALSE;
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/* RLE encode */
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PROFILER_ENTER(context->priv->prof_nsc_rle_compress_data)
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nsc_rle_compress_data(context);
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PROFILER_EXIT(context->priv->prof_nsc_rle_compress_data)
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message.PlaneBuffers[0] = context->priv->PlaneBuffers[0];
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message.PlaneBuffers[1] = context->priv->PlaneBuffers[1];
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message.PlaneBuffers[2] = context->priv->PlaneBuffers[2];
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message.PlaneBuffers[3] = context->priv->PlaneBuffers[3];
|
|
message.LumaPlaneByteCount = context->PlaneByteCount[0];
|
|
message.OrangeChromaPlaneByteCount = context->PlaneByteCount[1];
|
|
message.GreenChromaPlaneByteCount = context->PlaneByteCount[2];
|
|
message.AlphaPlaneByteCount = context->PlaneByteCount[3];
|
|
message.ColorLossLevel = context->ColorLossLevel;
|
|
message.ChromaSubsamplingLevel = context->ChromaSubsamplingLevel;
|
|
return nsc_write_message(context, s, &message);
|
|
}
|
|
|
|
BOOL nsc_decompose_message(NSC_CONTEXT* context, wStream* s, BYTE* bmpdata,
|
|
UINT32 x, UINT32 y, UINT32 width, UINT32 height,
|
|
UINT32 rowstride, UINT32 format, UINT32 flip)
|
|
{
|
|
size_t size = Stream_GetRemainingLength(s);
|
|
if (size > UINT32_MAX)
|
|
return FALSE;
|
|
|
|
if (!nsc_process_message(context, (UINT16)GetBitsPerPixel(context->format),
|
|
width, height, Stream_Pointer(s),
|
|
(UINT32)size, bmpdata, format,
|
|
rowstride, x, y, width, height, flip))
|
|
return FALSE;
|
|
Stream_Seek(s, size);
|
|
return TRUE;
|
|
}
|