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#include <config.h>
#include "jpeg_mem_dest.h"
#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;
}
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