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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* img_encoder.cc
*
* Mon Nov 15 19:45:07 CET 2004
* Copyright 2004 Bent Bisballe
* deva@aasimon.org
****************************************************************************/
/*
* Originally from:
* RTVideoRec Realtime video recoder and encoder for Linux
*
* Copyright (C) 2004 B. Stultiens
* Copyright (C) 2004 Koen Otter and Glenn van der Meyden
*/
/*
* This file is part of MIaV.
*
* MIaV is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MIaV is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MIaV; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "img_encoder.h"
#include <stdio.h>
#include <libdv/dv.h>
#include <libdv/dv_types.h>
extern "C" {
#include <jpeglib.h>
}
#include <hugin.hpp>
#include "jpeg_mem_dest.h"
#include "miav_config.h"
ImgEncoder::ImgEncoder(const char* cpr)
{
// Create path and filename
char fname[256];
string *server_root;
char birthmonth[3];
char date[32];
char encrypted_cpr[32];
// Get server root
server_root = config->readString("server_image_root");
// Copy the bytes representing the birth month from the cpr
// [dd][mm][yy]-[nn][nn]
strncpy(birthmonth, &cpr[2], 2);
birthmonth[2] = 0;
// Create date (today) in [yyyy][mm][dd]
struct tm *ltime;
time_t t = time(NULL);
ltime = localtime(&t);
sprintf(date, "%.4d%.2d%.2d",
ltime->tm_year + 1900,
ltime->tm_mon,
ltime->tm_mday);
// Create 'encrypted' cpr, reverse numbers, skip month, and subtract from 9
// [d1][d2][m1][m2][y1][y2]-[n1][n2][n3][n4]
// =>
// [9-n4][9-n3][9-n2][9-n1][9-y2][9-y1][9-d2][9-d1]
memset(encrypted_cpr, 0, sizeof(encrypted_cpr));
int p = strlen(cpr) - 1;
int cnt = 0;
while(p) {
encrypted_cpr[cnt] = cpr[p];
p--;
if(p == 2) p--;
if(cpr[p] == '-' || p == 3) p--;
cnt++;
}
sprintf(fname, "%s/%s/%s/%s-%s-", server_root->c_str(), birthmonth, encrypted_cpr, cpr, date);
file = new File(fname, "jpg");
}
ImgEncoder::~ImgEncoder()
{
delete file;
}
void ImgEncoder::encode(Frame *dvframe, int quality)
{
unsigned char rgb[720*576*4];
getRGB(dvframe, rgb);
writeJPEGFile(quality, rgb, 720, 576);
}
void ImgEncoder::writeJPEGFile(int quality, unsigned char *rgb, int image_width, int image_height)
{
JSAMPLE *image_buffer = (JSAMPLE*)rgb;
size_t buffersize = (image_width * image_height * 3) + JPEG_HEADER_PAD;
char *jpeg_output_buffer = new char [buffersize];
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
JSAMPROW row_pointer[1]; // pointer to JSAMPLE row[s]
int row_stride; // physical row width in image buffer
// Allocate and initialize JPEG compression object
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
// Specify data destination (see jpeg_mem_dest)
jpeg_mem_dest(&cinfo, jpeg_output_buffer, &buffersize);
// Set compression parameters
cinfo.image_width = image_width; // image width and height, in pixels
cinfo.image_height = image_height;
cinfo.input_components = 3; // # of color components per pixel
cinfo.in_color_space = JCS_RGB; // colorspace of input image
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, quality, TRUE); // limit to baseline-JPEG values
// Start compressor
jpeg_start_compress(&cinfo, TRUE);
// While (scan lines remain to be written)
row_stride = image_width * 3; // JSAMPLEs per row in image_buffer
while (cinfo.next_scanline < cinfo.image_height) {
row_pointer[0] = & image_buffer[cinfo.next_scanline * row_stride];
(void) jpeg_write_scanlines(&cinfo, row_pointer, 1);
}
// Finish compression
jpeg_finish_compress(&cinfo);
// Release JPEG compression object
jpeg_destroy_compress(&cinfo);
DEBUG(jpeg, "JPEG buffersize: %d", (int)buffersize);
file->Write(jpeg_output_buffer, buffersize);
delete jpeg_output_buffer;
}
void ImgEncoder::getRGB(Frame *frame, unsigned char *rgb)
{
unsigned char *pixels[3];
int pitches[3];
pixels[ 0 ] = rgb;
pixels[ 1 ] = NULL;
pixels[ 2 ] = NULL;
pitches[ 0 ] = 720 * 3;
pitches[ 1 ] = 0;
pitches[ 2 ] = 0;
dv_decoder_t *decoder = dv_decoder_new(FALSE/*this value is unused*/, FALSE, FALSE);
decoder->quality = DV_QUALITY_BEST;
dv_parse_header(decoder, frame->data);
decoder->system = e_dv_system_625_50; // PAL lines, PAL framerate
decoder->sampling = e_dv_sample_422; // 4 bytes y, 2 bytes u, 2 bytes v
decoder->std = e_dv_std_iec_61834;
decoder->num_dif_seqs = 12;
// libdv img decode to rgb
dv_decode_full_frame(decoder,
frame->data,
e_dv_color_rgb,
pixels,
pitches);
dv_decoder_free(decoder);
}
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