/* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <stdint.h> #include "libavcodec/packet.h" #include "libavutil/common.h"#include "libavutil/error.h"#include "libavutil/frame.h"#include "libavutil/mem.h" #include "objpool.h" struct ObjPool {    void        *pool[32];    unsigned int pool_count;     ObjPoolCBAlloc alloc;    ObjPoolCBReset reset;    ObjPoolCBFree  free;}; ObjPool *objpool_alloc(ObjPoolCBAlloc cb_alloc, ObjPoolCBReset cb_reset,                       ObjPoolCBFree cb_free){    ObjPool *op = av_mallocz(sizeof(*op));     if (!op)        return NULL;     op->alloc = cb_alloc;    op->reset = cb_reset;    op->free  = cb_free;     return op;} void objpool_free(ObjPool **pop){    ObjPool *op = *pop;     if (!op)        return;     for (unsigned int i = 0; i < op->pool_count; i++)        op->free(&op->pool[i]);     av_freep(pop);} int  objpool_get(ObjPool *op, void **obj){    if (op->pool_count) {        *obj = op->pool[--op->pool_count];        op->pool[op->pool_count] = NULL;    } else        *obj = op->alloc();     return *obj ? 0 : AVERROR(ENOMEM);} void objpool_release(ObjPool *op, void **obj){    if (!*obj)        return;     op->reset(*obj);     if (op->pool_count < FF_ARRAY_ELEMS(op->pool))        op->pool[op->pool_count++] = *obj;    else        op->free(obj);     *obj = NULL;} static void *alloc_packet(void){    return av_packet_alloc();}static void *alloc_frame(void){    return av_frame_alloc();} static void reset_packet(void *obj){    av_packet_unref(obj);}static void reset_frame(void *obj){    av_frame_unref(obj);} static void free_packet(void **obj){    AVPacket *pkt = *obj;    av_packet_free(&pkt);    *obj = NULL;}static void free_frame(void **obj){    AVFrame *frame = *obj;    av_frame_free(&frame);    *obj = NULL;} ObjPool *objpool_alloc_packets(void){    return objpool_alloc(alloc_packet, reset_packet, free_packet);}ObjPool *objpool_alloc_frames(void){    return objpool_alloc(alloc_frame, reset_frame, free_frame);}