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#include "mpeg3private.h"
#include <stdlib.h>
#include <string.h>
// This is basically qtcache.c with quicktime_ replaced by mpeg3_
mpeg3_cache_t* mpeg3_new_cache()
{
mpeg3_cache_t *result = calloc(1, sizeof(mpeg3_cache_t));
return result;
}
void mpeg3_delete_cache(mpeg3_cache_t *ptr)
{
if(ptr->frames)
{
int i;
for(i = 0; i < ptr->allocation; i++)
{
mpeg3_cacheframe_t *frame = &ptr->frames[i];
if(frame->y) free(frame->y);
if(frame->u) free(frame->u);
if(frame->v) free(frame->v);
}
free(ptr->frames);
free(ptr);
}
}
void mpeg3_reset_cache(mpeg3_cache_t *ptr)
{
ptr->total = 0;
}
void mpeg3_cache_put_frame(mpeg3_cache_t *ptr,
int64_t frame_number,
unsigned char *y,
unsigned char *u,
unsigned char *v,
int y_size,
int u_size,
int v_size)
{
mpeg3_cacheframe_t *frame = 0;
int i;
//printf("mpeg3_put_frame 1\n");
// Get existing frame
for(i = 0; i < ptr->total; i++)
{
if(ptr->frames[i].frame_number == frame_number)
{
frame = &ptr->frames[i];
break;
}
}
if(!frame)
{
if(ptr->total >= ptr->allocation)
{
int new_allocation = ptr->allocation * 2;
//printf("mpeg3_put_frame 10 %d\n", new_allocation);
if(!new_allocation) new_allocation = 32;
ptr->frames = realloc(ptr->frames,
sizeof(mpeg3_cacheframe_t) * new_allocation);
bzero(ptr->frames + ptr->total,
sizeof(mpeg3_cacheframe_t) * (new_allocation - ptr->allocation));
//printf("mpeg3_put_frame 20 %d %d %d\n", new_allocation, ptr->allocation, ptr->total);
ptr->allocation = new_allocation;
}
frame = &ptr->frames[ptr->total];
//printf("mpeg3_put_frame 30 %d %p %p %p\n", ptr->total, frame->y, frame->u, frame->v);
ptr->total++;
// Memcpy is a lot slower than just dropping the seeking frames.
if(y)
{
frame->y = realloc(frame->y, y_size);
frame->y_size = y_size;
memcpy(frame->y, y, y_size);
}
if(u)
{
frame->u = realloc(frame->u, u_size);
frame->u_size = u_size;
memcpy(frame->u, u, u_size);
}
if(v)
{
frame->v = realloc(frame->v, v_size);
frame->v_size = v_size;
memcpy(frame->v, v, v_size);
}
frame->frame_number = frame_number;
}
//printf("mpeg3_put_frame 100\n");
}
int mpeg3_cache_get_frame(mpeg3_cache_t *ptr,
int64_t frame_number,
unsigned char **y,
unsigned char **u,
unsigned char **v)
{
int i;
for(i = 0; i < ptr->total; i++)
{
mpeg3_cacheframe_t *frame = &ptr->frames[i];
if(frame->frame_number == frame_number)
{
*y = frame->y;
*u = frame->u;
*v = frame->v;
return 1;
break;
}
}
return 0;
}
int mpeg3_cache_has_frame(mpeg3_cache_t *ptr,
int64_t frame_number)
{
int i;
for(i = 0; i < ptr->total; i++)
{
mpeg3_cacheframe_t *frame = &ptr->frames[i];
if(frame->frame_number == frame_number)
return 1;
}
return 0;
}
int64_t mpeg3_cache_usage(mpeg3_cache_t *ptr)
{
int64_t result = 0;
int i;
for(i = 0; i < ptr->allocation; i++)
{
mpeg3_cacheframe_t *frame = &ptr->frames[i];
result += frame->y_size + frame->u_size + frame->v_size;
}
return result;
}
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