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#include "img_encoder.h"
#include <stdio.h>
#include "debug.h"
#include <libdv/dv.h>
#include <libdv/dv_types.h>
ImgEncoder::ImgEncoder(const char* cpr, Info *i)
{
info = i;
char fname[256];
string *server_root;
char birthmonth[3];
char date[32];
char encrypted_cpr[32];
server_root = config->readString("server_image_root");
strncpy(birthmonth, &cpr[2], 2);
birthmonth[2] = 0;
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);
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", info);
}
ImgEncoder::~ImgEncoder()
{
delete file;
}
void ImgEncoder::encode(Frame *dvframe, int quality)
{
unsigned char rgb[720*576*4];
getRGB(dvframe, rgb);
writeJPEGFile(quality, (JSAMPLE*)rgb, 720, 576);
}
#define OUTPUT_BUF_SIZE 4096
typedef struct {
struct jpeg_destination_mgr pub;
JOCTET * outbuff;
size_t * size;
} mem_destination_mgr;
typedef mem_destination_mgr * mem_dest_ptr;
void init_destination (j_compress_ptr cinfo)
{
mem_dest_ptr dest = (mem_dest_ptr) cinfo->dest;
*dest->size = 0;
dest->pub.next_output_byte = dest->outbuff;
dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
}
void term_destination (j_compress_ptr cinfo)
{
mem_dest_ptr dest = (mem_dest_ptr) cinfo->dest;
size_t datacount = OUTPUT_BUF_SIZE - dest->pub.free_in_buffer;
if (datacount > 0) {
dest->outbuff+=datacount;
*dest->size+=datacount;
}
}
boolean empty_output_buffer (j_compress_ptr cinfo)
{
mem_dest_ptr dest = (mem_dest_ptr) cinfo->dest;
dest->outbuff+=OUTPUT_BUF_SIZE;
*dest->size+=OUTPUT_BUF_SIZE;
dest->pub.next_output_byte = dest->outbuff;
dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
return TRUE;
}
void jpeg_mem_dest (j_compress_ptr cinfo, char * outbuff, size_t * size)
{
mem_dest_ptr dest;
if (cinfo->dest == NULL) {
cinfo->dest = (struct jpeg_destination_mgr *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
sizeof(mem_destination_mgr));
}
dest = (mem_dest_ptr) cinfo->dest;
dest->pub.init_destination = init_destination;
dest->pub.empty_output_buffer = empty_output_buffer;
dest->pub.term_destination = term_destination;
dest->outbuff = (JOCTET *)outbuff;
dest->size = (size_t *)size;
}
void ImgEncoder::writeJPEGFile(int quality, JSAMPLE * image_buffer, int image_width, int image_height)
{
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];
int row_stride;
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
jpeg_mem_dest(&cinfo, jpeg_output_buffer, &buffersize);
cinfo.image_width = image_width;
cinfo.image_height = image_height;
cinfo.input_components = 3;
cinfo.in_color_space = JCS_RGB;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, quality, TRUE);
jpeg_start_compress(&cinfo, TRUE);
row_stride = image_width * 3;
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);
}
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
info->info("JPEG buffersize: %d", 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, FALSE, FALSE);
decoder->quality = DV_QUALITY_BEST;
dv_parse_header(decoder, frame->data);
decoder->system = e_dv_system_625_50;
decoder->sampling = e_dv_sample_422;
decoder->std = e_dv_std_iec_61834;
decoder->num_dif_seqs = 12;
dv_decode_full_frame(decoder,
frame->data,
e_dv_color_rgb,
pixels,
pitches);
dv_decoder_free(decoder);
}
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