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xrdp/libxrdp/xrdp_jpeg_compress.c
Jay Sorg 6cd6f15d46 libxrdp: not logic change, comments
2014-02-15 20:37:10 -08:00

425 lines
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/**
* xrdp: A Remote Desktop Protocol server.
*
* Copyright (C) Jay Sorg 2004-2014
*
* 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.
*
* jpeg compressor
*/
#include "libxrdp.h"
#if defined(XRDP_TJPEG)
/* turbo jpeg */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <turbojpeg.h>
/*****************************************************************************/
int APP_CC
xrdp_jpeg_compress(void *handle, char *in_data, int width, int height,
struct stream *s, int bpp, int byte_limit,
int start_line, struct stream *temp_s,
int e, int quality)
{
int error;
int i;
int j;
unsigned int pixel;
unsigned int *src32;
unsigned int *dst32;
unsigned long cdata_bytes;
unsigned char *src_buf;
unsigned char *dst_buf;
char *temp_buf;
tjhandle tj_han;
if (bpp != 24)
{
g_writeln("xrdp_jpeg_compress: bpp wrong %d", bpp);
return height;
}
if (handle == 0)
{
g_writeln("xrdp_jpeg_compress: handle is nil");
return height;
}
tj_han = (tjhandle) handle;
cdata_bytes = byte_limit;
src_buf = (unsigned char *) in_data;
dst_buf = (unsigned char *) (s->p);
temp_buf = 0;
if (e == 0)
{
src_buf = (unsigned char*)in_data;
}
else
{
temp_buf = (char *) g_malloc((width + e) * height * 4, 0);
dst32 = (unsigned int *) temp_buf;
src32 = (unsigned int *) in_data;
for (j = 0; j < height; j++)
{
for (i = 0; i < width; i++)
{
pixel = *src32;
src32++;
*dst32 = pixel;
dst32++;
}
for (i = 0; i < e; i++)
{
*dst32 = pixel;
dst32++;
}
}
src_buf = (unsigned char *) temp_buf;
}
dst_buf = (unsigned char*)(s->p);
error = tjCompress(tj_han, src_buf, width + e, (width + e) * 4, height,
TJPF_XBGR, dst_buf, &cdata_bytes,
TJSAMP_420, quality, 0);
s->p += cdata_bytes;
g_free(temp_buf);
return height;
}
/**
* Compress a rectangular area (aka inner rectangle) inside our
* frame buffer (inp_data)
*****************************************************************************/
int APP_CC
xrdp_codec_jpeg_compress(void *handle,
int format, /* input data format */
char *inp_data, /* input data */
int width, /* width of inp_data */
int height, /* height of inp_data */
int stride, /* inp_data stride, in bytes*/
int x, /* x loc in inp_data */
int y, /* y loc in inp_data */
int cx, /* width of area to compress */
int cy, /* height of area to compress */
int quality, /* higher numbers compress less */
char *out_data, /* dest for jpg image */
int *io_len /* length of out_data and on return */
/* len of compressed data */
)
{
tjhandle tj_han;
int error;
int bpp;
char *src_ptr;
/*
* note: for now we assume that format is always XBGR and ignore format
*/
if (handle == 0)
{
g_writeln("xrdp_codec_jpeg_compress: handle is nil");
return height;
}
tj_han = (tjhandle) handle;
/* get bytes per pixel */
bpp = stride / width;
/* start of inner rect in inp_data */
src_ptr = inp_data + (y * stride + x * bpp);
/* compress inner rect */
error = tjCompress(tj_han, /* opaque handle */
src_ptr, /* source buf */
cx, /* width of area to compress */
stride, /* pitch */
cy, /* height of area to compress */
TJPF_XBGR, /* pixel size */
out_data, /* dest buf */
io_len, /* inner_buf length & compressed_size */
TJSAMP_420, /* jpeg sub sample */
quality, /* jpeg quality */
0 /* flags */
);
return height;
}
/*****************************************************************************/
void *APP_CC
xrdp_jpeg_init(void)
{
tjhandle tj_han;
tj_han = tjInitCompress();
return tj_han;
}
/*****************************************************************************/
int APP_CC
xrdp_jpeg_deinit(void *handle)
{
tjhandle tj_han;
if (handle == 0)
{
return 0;
}
tj_han = (tjhandle) handle;
tjDestroy(tj_han);
return 0;
}
#elif defined(XRDP_JPEG)
/* libjpeg */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <jpeglib.h>
#define JP_QUALITY 75
struct mydata_comp
{
char *cb;
int cb_bytes;
int total_done;
int overwrite;
};
/*****************************************************************************/
/* called at begining */
static void DEFAULT_CC
my_init_destination(j_compress_ptr cinfo)
{
struct mydata_comp *md;
md = (struct mydata_comp *)(cinfo->client_data);
md->total_done = 0;
md->overwrite = 0;
cinfo->dest->next_output_byte = md->cb;
cinfo->dest->free_in_buffer = md->cb_bytes;
}
/*****************************************************************************/
/* called when buffer is full and we need more space */
static int DEFAULT_CC
my_empty_output_buffer(j_compress_ptr cinfo)
{
struct mydata_comp *md;
int chunk_bytes;
md = (struct mydata_comp *)(cinfo->client_data);
chunk_bytes = md->cb_bytes;
md->total_done += chunk_bytes;
cinfo->dest->next_output_byte = md->cb;
cinfo->dest->free_in_buffer = md->cb_bytes;
md->overwrite = 1;
return 1;
}
/*****************************************************************************/
/* called at end */
static void DEFAULT_CC
my_term_destination(j_compress_ptr cinfo)
{
struct mydata_comp *md;
int chunk_bytes;
md = (struct mydata_comp *)(cinfo->client_data);
chunk_bytes = md->cb_bytes - cinfo->dest->free_in_buffer;
md->total_done += chunk_bytes;
}
/*****************************************************************************/
static int APP_CC
jp_do_compress(char *data, int width, int height, int bpp, int quality,
char *comp_data, int *comp_data_bytes)
{
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
struct jpeg_destination_mgr dst_mgr;
struct mydata_comp md;
JSAMPROW row_pointer[4];
int Bpp;
Bpp = (bpp + 7) / 8;
memset(&cinfo, 0, sizeof(cinfo));
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
memset(&md, 0, sizeof(md));
md.cb = comp_data,
md.cb_bytes = *comp_data_bytes;
cinfo.client_data = &md;
memset(&dst_mgr, 0, sizeof(dst_mgr));
dst_mgr.init_destination = my_init_destination;
dst_mgr.empty_output_buffer = my_empty_output_buffer;
dst_mgr.term_destination = my_term_destination;
cinfo.dest = &dst_mgr;
cinfo.image_width = width;
cinfo.image_height = height;
cinfo.input_components = Bpp;
cinfo.in_color_space = JCS_RGB;
jpeg_set_defaults(&cinfo);
cinfo.num_components = 3;
cinfo.dct_method = JDCT_FLOAT;
jpeg_set_quality(&cinfo, quality, 1);
jpeg_start_compress(&cinfo, 1);
while (cinfo.next_scanline + 3 < cinfo.image_height)
{
row_pointer[0] = data;
data += width * Bpp;
row_pointer[1] = data;
data += width * Bpp;
row_pointer[2] = data;
data += width * Bpp;
row_pointer[3] = data;
data += width * Bpp;
jpeg_write_scanlines(&cinfo, row_pointer, 4);
}
while (cinfo.next_scanline < cinfo.image_height)
{
row_pointer[0] = data;
data += width * Bpp;
jpeg_write_scanlines(&cinfo, row_pointer, 1);
}
jpeg_finish_compress(&cinfo);
*comp_data_bytes = md.total_done;
jpeg_destroy_compress(&cinfo);
if (md.overwrite)
{
return 1;
}
return 0;
}
/*****************************************************************************/
static int APP_CC
jpeg_compress(char *in_data, int width, int height,
struct stream *s, struct stream *temp_s, int bpp,
int byte_limit, int e, int quality)
{
char *data;
tui32 *src32;
tui16 *src16;
tui8 *dst8;
tui32 pixel;
int red;
int blue;
int green;
int j;
int i;
int cdata_bytes;
data = temp_s->data;
dst8 = data;
if (bpp == 24)
{
src32 = (tui32 *)in_data;
for (j = 0; j < height; j++)
{
for (i = 0; i < width; i++)
{
pixel = src32[i + j * width];
SPLITCOLOR32(red, green, blue, pixel);
*(dst8++) = blue;
*(dst8++) = green;
*(dst8++) = red;
}
for (i = 0; i < e; i++)
{
*(dst8++) = blue;
*(dst8++) = green;
*(dst8++) = red;
}
}
}
else
{
g_writeln("bpp wrong %d", bpp);
}
cdata_bytes = byte_limit;
jp_do_compress(data, width + e, height, 24, quality, s->p, &cdata_bytes);
s->p += cdata_bytes;
return cdata_bytes;
}
/*****************************************************************************/
int APP_CC
xrdp_jpeg_compress(void *handle, char *in_data, int width, int height,
struct stream *s, int bpp, int byte_limit,
int start_line, struct stream *temp_s,
int e, int quality)
{
jpeg_compress(in_data, width, height, s, temp_s, bpp, byte_limit,
e, quality);
return height;
}
/*****************************************************************************/
void *APP_CC
xrdp_jpeg_init(void)
{
return 0;
}
/*****************************************************************************/
int APP_CC
xrdp_jpeg_deinit(void *handle)
{
return 0;
}
#else
/*****************************************************************************/
int APP_CC
xrdp_jpeg_compress(void *handle, char *in_data, int width, int height,
struct stream *s, int bpp, int byte_limit,
int start_line, struct stream *temp_s,
int e, int quality)
{
return height;
}
/*****************************************************************************/
void *APP_CC
xrdp_jpeg_init(void)
{
return 0;
}
/*****************************************************************************/
int APP_CC
xrdp_jpeg_deinit(void *handle)
{
return 0;
}
#endif
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