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/*
* 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 "avassert.h"
#include "container_fifo.h"
#include "error.h"
#include "fifo.h"
#include "frame.h"
#include "mem.h"
#include "refstruct.h"
struct AVContainerFifo {
AVFifo *fifo;
AVRefStructPool *pool;
void *opaque;
void* (*container_alloc)(void *opaque);
void (*container_reset)(void *opaque, void *obj);
void (*container_free) (void *opaque, void *obj);
int (*fifo_transfer) (void *opaque, void *dst, void *src, unsigned flags);
};
static int container_fifo_init_entry(AVRefStructOpaque opaque, void *obj)
{
AVContainerFifo *cf = opaque.nc;
void **pobj = obj;
*pobj = cf->container_alloc(cf->opaque);
if (!*pobj)
return AVERROR(ENOMEM);
return 0;
}
static void container_fifo_reset_entry(AVRefStructOpaque opaque, void *obj)
{
AVContainerFifo *cf = opaque.nc;
cf->container_reset(cf->opaque, *(void**)obj);
}
static void container_fifo_free_entry(AVRefStructOpaque opaque, void *obj)
{
AVContainerFifo *cf = opaque.nc;
cf->container_free(cf->opaque, *(void**)obj);
}
AVContainerFifo*
av_container_fifo_alloc(void *opaque,
void* (*container_alloc)(void *opaque),
void (*container_reset)(void *opaque, void *obj),
void (*container_free) (void *opaque, void *obj),
int (*fifo_transfer) (void *opaque, void *dst, void *src, unsigned flags),
unsigned flags)
{
AVContainerFifo *cf;
cf = av_mallocz(sizeof(*cf));
if (!cf)
return NULL;
cf->opaque = opaque;
cf->container_alloc = container_alloc;
cf->container_reset = container_reset;
cf->container_free = container_free;
cf->fifo_transfer = fifo_transfer;
cf->fifo = av_fifo_alloc2(1, sizeof(void*), AV_FIFO_FLAG_AUTO_GROW);
if (!cf->fifo)
goto fail;
cf->pool = av_refstruct_pool_alloc_ext(sizeof(void*), 0, cf,
container_fifo_init_entry,
container_fifo_reset_entry,
container_fifo_free_entry,
NULL);
if (!cf->pool)
goto fail;
return cf;
fail:
av_container_fifo_free(&cf);
return NULL;
}
void av_container_fifo_free(AVContainerFifo **pcf)
{
AVContainerFifo *cf;
if (!*pcf)
return;
cf = *pcf;
if (cf->fifo) {
void *obj;
while (av_fifo_read(cf->fifo, &obj, 1) >= 0)
av_refstruct_unref(&obj);
av_fifo_freep2(&cf->fifo);
}
av_refstruct_pool_uninit(&cf->pool);
av_freep(pcf);
}
int av_container_fifo_read(AVContainerFifo *cf, void *obj, unsigned flags)
{
void **psrc;
int ret;
ret = av_fifo_read(cf->fifo, &psrc, 1);
if (ret < 0)
return ret;
ret = cf->fifo_transfer(cf->opaque, obj, *psrc, flags);
av_refstruct_unref(&psrc);
return ret;
}
int av_container_fifo_peek(AVContainerFifo *cf, void **pdst, size_t offset)
{
void **pobj;
int ret;
ret = av_fifo_peek(cf->fifo, &pobj, 1, offset);
if (ret < 0)
return ret;
*pdst = *pobj;
return 0;
}
void av_container_fifo_drain(AVContainerFifo *cf, size_t nb_elems)
{
av_assert0(nb_elems <= av_fifo_can_read(cf->fifo));
while (nb_elems--) {
void **pobj;
int ret = av_fifo_read(cf->fifo, &pobj, 1);
av_assert0(ret >= 0);
av_refstruct_unref(&pobj);
}
}
int av_container_fifo_write(AVContainerFifo *cf, void *obj, unsigned flags)
{
void **pdst;
int ret;
pdst = av_refstruct_pool_get(cf->pool);
if (!pdst)
return AVERROR(ENOMEM);
ret = cf->fifo_transfer(cf->opaque, *pdst, obj, flags);
if (ret < 0)
goto fail;
ret = av_fifo_write(cf->fifo, &pdst, 1);
if (ret < 0)
goto fail;
return 0;
fail:
av_refstruct_unref(&pdst);
return ret;
}
size_t av_container_fifo_can_read(const AVContainerFifo *cf)
{
return av_fifo_can_read(cf->fifo);
}
static void *frame_alloc(void *opaque)
{
return av_frame_alloc();
}
static void frame_reset(void *opaque, void *obj)
{
av_frame_unref(obj);
}
static void frame_free(void *opaque, void *obj)
{
AVFrame *frame = obj;
av_frame_free(&frame);
}
static int frame_transfer(void *opaque, void *dst, void *src, unsigned flags)
{
if (flags & AV_CONTAINER_FIFO_FLAG_REF)
return av_frame_ref(dst, src);
av_frame_move_ref(dst, src);
return 0;
}
AVContainerFifo *av_container_fifo_alloc_avframe(unsigned flags)
{
return av_container_fifo_alloc(NULL, frame_alloc, frame_reset, frame_free,
frame_transfer, 0);
}
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