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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* RTVideoRec Realtime video recoder and encoder for Linux
*
* Copyright (C) 2004 Bent Bisballe
* Copyright (C) 2004 B. Stultiens
* Copyright (C) 2004 Koen Otter and Glenn van der Meyden
*
* This program 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.
*
* This program 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 this program; 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 <setjmp.h>
//av_alloc_format_context
//av_destruct_packet_nofree
ImgEncoder::ImgEncoder()
{
//////////////////// GLOBAL INIT
av_register_all();
//////////////////// DECODE INIT
AVCodec *deccodec;
// find the dvvideo decoder
deccodec = avcodec_find_decoder(CODEC_ID_DVVIDEO);
if (!deccodec) {
fprintf(stderr, "codec not found\n");
exit(1);
}
dcc= avcodec_alloc_context();
// open it
if (avcodec_open(dcc, deccodec) < 0) {
fprintf(stderr, "could not open codec\n");
exit(1);
}
}
ImgEncoder::~ImgEncoder()
{
// FIXME: free: deccodec and dcc
}
void ImgEncoder::encode(DVFrame *dvframe,
char *filename,
int quality)
{
int ret;
AVFrame *rawframe = avcodec_alloc_frame();
///////////////////////// DECODE
uint8_t *ptr;
int got_picture = 1;
int len;
ptr = (uint8_t *)dvframe->frame;
len = sizeof(dvframe->frame);
ret = avcodec_decode_video(dcc, rawframe, &got_picture, ptr, len);
if(!ret) {
printf("Decoder fuckup!\n");
return;
}
// TODO: Do image convertion here!
AVPicture pict;
avpicture_alloc(&pict,PIX_FMT_RGB24, 720, 576);
img_convert(&pict, PIX_FMT_RGB24, (AVPicture *)rawframe,
PIX_FMT_YUV420P, 720, 576);
printf("converted\n");
writeJPEGFile(filename, quality, (JSAMPLE*)(pict.data[0]), 720, 576);
printf("written\n");
avpicture_free(&pict);
av_free(rawframe);
}
///////////////////////////////////////////////////////////////////////////////////////////
void ImgEncoder::writeJPEGFile(char *filename,
int quality,
JSAMPLE * image_buffer, // Points to large array of R,G,B-order data
int image_width, // Number of columns in image
int image_height // Number of rows in image
)
{
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
FILE * outfile; // target file
JSAMPROW row_pointer[1]; // pointer to JSAMPLE row[s]
int row_stride; // physical row width in image buffer
// Step 1: allocate and initialize JPEG compression object
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
// Step 2: specify data destination (eg, a file)
if ((outfile = fopen(filename, "wb")) == NULL) {
fprintf(stderr, "can't open %s\n", filename);
exit(1);
}
jpeg_stdio_dest(&cinfo, outfile);
// Step 3: set parameters for compression
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
/*
typedef enum {
JCS_UNKNOWN, // error/unspecified
JCS_GRAYSCALE, // monochrome
JCS_RGB, // red/green/blue
JCS_YCbCr, // Y/Cb/Cr (also known as YUV)
JCS_CMYK, // C/M/Y/K
JCS_YCCK // Y/Cb/Cr/K
} J_COLOR_SPACE;
*/
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
// Step 4: Start compressor
jpeg_start_compress(&cinfo, TRUE);
// Step 5: 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);
}
// Step 6: Finish compression
jpeg_finish_compress(&cinfo);
fclose(outfile);
// Step 7: release JPEG compression object
jpeg_destroy_compress(&cinfo);
}
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