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/*
FreeRDP: A Remote Desktop Protocol client.
RemoteFX Codec Library - Encode
Copyright 2011 Vic Lee
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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "rfx_rlgr.h"
#include "rfx_differential.h"
#include "rfx_quantization.h"
#include "rfx_dwt.h"
#include "rfx_encode.h"
#define MINMAX(_v,_l,_h) ((_v) < (_l) ? (_l) : ((_v) > (_h) ? (_h) : (_v)))
static __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
rfx_encode_format_RGB(const uint8 * rgb_data, int width, int height, int rowstride,
RFX_PIXEL_FORMAT pixel_format, sint16 * r_buf, sint16 * g_buf, sint16 * b_buf)
{
int x, y;
int x_exceed;
int y_exceed;
const uint8 * src;
x_exceed = 64 - width;
y_exceed = 64 - height;
for (y = 0; y < height; y++)
{
src = rgb_data + y * rowstride;
switch (pixel_format)
{
case RFX_PIXEL_FORMAT_BGRA:
for (x = 0; x < width; x++)
{
*b_buf++ = (sint16) (*src++);
*g_buf++ = (sint16) (*src++);
*r_buf++ = (sint16) (*src++);
src++;
}
break;
case RFX_PIXEL_FORMAT_RGBA:
for (x = 0; x < width; x++)
{
*r_buf++ = (sint16) (*src++);
*g_buf++ = (sint16) (*src++);
*b_buf++ = (sint16) (*src++);
src++;
}
break;
case RFX_PIXEL_FORMAT_BGR:
for (x = 0; x < width; x++)
{
*b_buf++ = (sint16) (*src++);
*g_buf++ = (sint16) (*src++);
*r_buf++ = (sint16) (*src++);
}
break;
case RFX_PIXEL_FORMAT_RGB:
for (x = 0; x < width; x++)
{
*r_buf++ = (sint16) (*src++);
*g_buf++ = (sint16) (*src++);
*b_buf++ = (sint16) (*src++);
}
break;
default:
break;
}
/* Fill the horizontal region outside of 64x64 tile size to 0 in order to be better compressed. */
if (x_exceed > 0)
{
memset(r_buf, 0, x_exceed * sizeof(sint16));
memset(g_buf, 0, x_exceed * sizeof(sint16));
memset(b_buf, 0, x_exceed * sizeof(sint16));
r_buf += x_exceed;
g_buf += x_exceed;
b_buf += x_exceed;
}
}
/* Fill the vertical region outside of 64x64 tile size to 0 in order to be better compressed. */
if (y_exceed > 0)
{
memset(r_buf, 0, y_exceed * 64 * sizeof(sint16));
memset(g_buf, 0, y_exceed * 64 * sizeof(sint16));
memset(b_buf, 0, y_exceed * 64 * sizeof(sint16));
}
}
void
rfx_encode_RGB_to_YCbCr(sint16 * y_r_buf, sint16 * cb_g_buf, sint16 * cr_b_buf)
{
sint16 y, cb, cr;
sint16 r, g, b;
int i;
for (i = 0; i < 4096; i++)
{
r = y_r_buf[i];
g = cb_g_buf[i];
b = cr_b_buf[i];
y = ((r >> 2) + (r >> 5) + (r >> 6)) + ((g >> 1) + (g >> 4) + (g >> 6) + (g >> 7)) + ((b >> 4) + (b >> 5) + (b >> 6));
y_r_buf[i] = MINMAX(y, 0, 255) - 128;
cb = 0 - ((r >> 3) + (r >> 5) + (r >> 7)) - ((g >> 2) + (g >> 4) + (g >> 6)) + (b >> 1);
cb_g_buf[i] = MINMAX(cb, -128, 127);
cr = (r >> 1) - ((g >> 2) + (g >> 3) + (g >> 5) + (g >> 7)) - ((b >> 4) + (b >> 6));
cr_b_buf[i] = MINMAX(cr, -128, 127);
}
}
static void
rfx_encode_component(RFX_CONTEXT * context, const uint32 * quantization_values,
sint16 * data, uint8 * buffer, int buffer_size, int * size)
{
PROFILER_ENTER(context->prof_rfx_encode_component);
PROFILER_ENTER(context->prof_rfx_dwt_2d_encode);
rfx_dwt_2d_encode(data, context->dwt_buffer);
PROFILER_EXIT(context->prof_rfx_dwt_2d_encode);
PROFILER_ENTER(context->prof_rfx_quantization_encode);
context->quantization_encode(data, quantization_values);
PROFILER_EXIT(context->prof_rfx_quantization_encode);
PROFILER_ENTER(context->prof_rfx_differential_encode);
rfx_differential_encode(data + 4032, 64);
PROFILER_EXIT(context->prof_rfx_differential_encode);
PROFILER_ENTER(context->prof_rfx_rlgr_encode);
*size = rfx_rlgr_encode(context->mode, data, 4096, buffer, buffer_size);
PROFILER_EXIT(context->prof_rfx_rlgr_encode);
PROFILER_EXIT(context->prof_rfx_encode_component);
}
void
rfx_encode_rgb(RFX_CONTEXT * context, const uint8 * rgb_data, int width, int height, int rowstride,
const uint32 * y_quants, const uint32 * cb_quants, const uint32 * cr_quants,
uint8 * ycbcr_buffer, int buffer_size, int * y_size, int * cb_size, int * cr_size)
{
sint16 * y_r_buffer = context->y_r_buffer;
sint16 * cb_g_buffer = context->cb_g_buffer;
sint16 * cr_b_buffer = context->cr_b_buffer;
PROFILER_ENTER(context->prof_rfx_encode_rgb);
PROFILER_ENTER(context->prof_rfx_encode_format_RGB);
rfx_encode_format_RGB(rgb_data, width, height, rowstride,
context->pixel_format, y_r_buffer, cb_g_buffer, cr_b_buffer);
PROFILER_EXIT(context->prof_rfx_encode_format_RGB);
PROFILER_ENTER(context->prof_rfx_encode_RGB_to_YCbCr);
context->encode_RGB_to_YCbCr(context->y_r_buffer, context->cb_g_buffer, context->cr_b_buffer);
PROFILER_EXIT(context->prof_rfx_encode_RGB_to_YCbCr);
rfx_encode_component(context, y_quants, context->y_r_buffer, ycbcr_buffer, buffer_size, y_size);
ycbcr_buffer += (*y_size);
buffer_size -= (*y_size);
rfx_encode_component(context, cb_quants, context->cb_g_buffer, ycbcr_buffer, buffer_size, cb_size);
ycbcr_buffer += (*cb_size);
buffer_size -= (*cb_size);
rfx_encode_component(context, cr_quants, context->cr_b_buffer, ycbcr_buffer, buffer_size, cr_size);
PROFILER_EXIT(context->prof_rfx_encode_rgb);
}
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