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/*
* OMAP3 ISP library - V4L2 buffers pool
*
* Copyright (C) 2010-2011 Ideas on board SPRL
*
* Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
*
* This library 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.
*
* This library 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 General Public License for
* more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include <string.h>
#include "v4l2-pool.h"
struct v4l2_buffers_pool *v4l2_buffers_pool_new(unsigned int nbufs)
{
struct v4l2_video_buffer *buffers;
struct v4l2_buffers_pool *pool;
pool = malloc(sizeof *pool);
if (pool == NULL)
return NULL;
buffers = malloc(sizeof *buffers * nbufs);
if (buffers == NULL) {
free(pool);
return NULL;
}
memset(buffers, 0, sizeof *buffers * nbufs);
pool->nbufs = nbufs;
pool->buffers = buffers;
return pool;
}
void v4l2_buffers_pool_delete(struct v4l2_buffers_pool *pool)
{
unsigned int i;
for (i = 0; i < pool->nbufs; ++i) {
if (pool->buffers[i].allocated)
free(pool->buffers[i].mem);
}
free(pool->buffers);
free(pool);
}
int v4l2_buffers_pool_alloc(struct v4l2_buffers_pool *pool, size_t size,
size_t align)
{
unsigned int i;
int ret;
for (i = 0; i < pool->nbufs; ++i) {
ret = posix_memalign(&pool->buffers[i].mem, align, size);
if (ret != 0)
return -ret;
pool->buffers[i].size = size;
pool->buffers[i].allocated = true;
}
return 0;
}
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