80 строки
2.6 KiB
C
80 строки
2.6 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#include <assert.h>
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#include "av1/common/frame_buffers.h"
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#include "aom_mem/aom_mem.h"
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int av1_alloc_internal_frame_buffers(InternalFrameBufferList *list) {
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assert(list != NULL);
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av1_free_internal_frame_buffers(list);
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list->num_internal_frame_buffers =
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AOM_MAXIMUM_REF_BUFFERS + AOM_MAXIMUM_WORK_BUFFERS;
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list->int_fb = (InternalFrameBuffer *)aom_calloc(
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list->num_internal_frame_buffers, sizeof(*list->int_fb));
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return (list->int_fb == NULL);
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}
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void av1_free_internal_frame_buffers(InternalFrameBufferList *list) {
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int i;
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assert(list != NULL);
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for (i = 0; i < list->num_internal_frame_buffers; ++i) {
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aom_free(list->int_fb[i].data);
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list->int_fb[i].data = NULL;
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}
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aom_free(list->int_fb);
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list->int_fb = NULL;
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}
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int av1_get_frame_buffer(void *cb_priv, size_t min_size,
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aom_codec_frame_buffer_t *fb) {
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int i;
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InternalFrameBufferList *const int_fb_list =
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(InternalFrameBufferList *)cb_priv;
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if (int_fb_list == NULL) return -1;
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// Find a free frame buffer.
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for (i = 0; i < int_fb_list->num_internal_frame_buffers; ++i) {
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if (!int_fb_list->int_fb[i].in_use) break;
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}
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if (i == int_fb_list->num_internal_frame_buffers) return -1;
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if (int_fb_list->int_fb[i].size < min_size) {
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aom_free(int_fb_list->int_fb[i].data);
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// The data must be zeroed to fix a valgrind error from the C loop filter
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// due to access uninitialized memory in frame border. It could be
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// skipped if border were totally removed.
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int_fb_list->int_fb[i].data = (uint8_t *)aom_calloc(1, min_size);
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if (!int_fb_list->int_fb[i].data) return -1;
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int_fb_list->int_fb[i].size = min_size;
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}
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fb->data = int_fb_list->int_fb[i].data;
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fb->size = int_fb_list->int_fb[i].size;
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int_fb_list->int_fb[i].in_use = 1;
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// Set the frame buffer's private data to point at the internal frame buffer.
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fb->priv = &int_fb_list->int_fb[i];
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return 0;
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}
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int av1_release_frame_buffer(void *cb_priv, aom_codec_frame_buffer_t *fb) {
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InternalFrameBuffer *const int_fb = (InternalFrameBuffer *)fb->priv;
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(void)cb_priv;
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if (int_fb) int_fb->in_use = 0;
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return 0;
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}
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