72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
/*
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* Copyright (c) 2019, Linaro Limited
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr.h>
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#include <drivers/video.h>
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K_HEAP_DEFINE(video_buffer_pool,
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CONFIG_VIDEO_BUFFER_POOL_SZ_MAX *
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CONFIG_VIDEO_BUFFER_POOL_NUM_MAX);
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static struct video_buffer video_buf[CONFIG_VIDEO_BUFFER_POOL_NUM_MAX];
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struct mem_block {
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void *data;
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};
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static struct mem_block video_block[CONFIG_VIDEO_BUFFER_POOL_NUM_MAX];
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struct video_buffer *video_buffer_alloc(size_t size)
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{
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struct video_buffer *vbuf = NULL;
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struct mem_block *block;
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int i;
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/* find available video buffer */
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for (i = 0; i < ARRAY_SIZE(video_buf); i++) {
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if (video_buf[i].buffer == NULL) {
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vbuf = &video_buf[i];
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block = &video_block[i];
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break;
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}
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}
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if (vbuf == NULL) {
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return NULL;
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}
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/* Alloc buffer memory */
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block->data = k_heap_alloc(&video_buffer_pool, size, K_FOREVER);
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if (block->data == NULL) {
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return NULL;
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}
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vbuf->buffer = block->data;
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vbuf->size = size;
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vbuf->bytesused = 0;
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return vbuf;
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}
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void video_buffer_release(struct video_buffer *vbuf)
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{
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struct mem_block *block = NULL;
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int i;
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/* vbuf to block */
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for (i = 0; i < ARRAY_SIZE(video_block); i++) {
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if (video_block[i].data == vbuf->buffer) {
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block = &video_block[i];
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break;
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}
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}
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vbuf->buffer = NULL;
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if (block) {
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k_heap_free(&video_buffer_pool, block->data);
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}
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}
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