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Import aom library

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This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.
This commit is contained in:
trav90 2018-10-15 21:45:30 -05:00 • committed by Roy Tam
commit edc8d83307
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79
third_party/aom/av1/common/frame_buffers.c vendored Normal file
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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include <assert.h>
#include "av1/common/frame_buffers.h"
#include "aom_mem/aom_mem.h"
int av1_alloc_internal_frame_buffers(InternalFrameBufferList *list) {
assert(list != NULL);
av1_free_internal_frame_buffers(list);
list->num_internal_frame_buffers =
AOM_MAXIMUM_REF_BUFFERS + AOM_MAXIMUM_WORK_BUFFERS;
list->int_fb = (InternalFrameBuffer *)aom_calloc(
list->num_internal_frame_buffers, sizeof(*list->int_fb));
return (list->int_fb == NULL);
}
void av1_free_internal_frame_buffers(InternalFrameBufferList *list) {
int i;
assert(list != NULL);
for (i = 0; i < list->num_internal_frame_buffers; ++i) {
aom_free(list->int_fb[i].data);
list->int_fb[i].data = NULL;
}
aom_free(list->int_fb);
list->int_fb = NULL;
}
int av1_get_frame_buffer(void *cb_priv, size_t min_size,
aom_codec_frame_buffer_t *fb) {
int i;
InternalFrameBufferList *const int_fb_list =
(InternalFrameBufferList *)cb_priv;
if (int_fb_list == NULL) return -1;
// Find a free frame buffer.
for (i = 0; i < int_fb_list->num_internal_frame_buffers; ++i) {
if (!int_fb_list->int_fb[i].in_use) break;
}
if (i == int_fb_list->num_internal_frame_buffers) return -1;
if (int_fb_list->int_fb[i].size < min_size) {
aom_free(int_fb_list->int_fb[i].data);
// The data must be zeroed to fix a valgrind error from the C loop filter
// due to access uninitialized memory in frame border. It could be
// skipped if border were totally removed.
int_fb_list->int_fb[i].data = (uint8_t *)aom_calloc(1, min_size);
if (!int_fb_list->int_fb[i].data) return -1;
int_fb_list->int_fb[i].size = min_size;
}
fb->data = int_fb_list->int_fb[i].data;
fb->size = int_fb_list->int_fb[i].size;
int_fb_list->int_fb[i].in_use = 1;
// Set the frame buffer's private data to point at the internal frame buffer.
fb->priv = &int_fb_list->int_fb[i];
return 0;
}
int av1_release_frame_buffer(void *cb_priv, aom_codec_frame_buffer_t *fb) {
InternalFrameBuffer *const int_fb = (InternalFrameBuffer *)fb->priv;
(void)cb_priv;
if (int_fb) int_fb->in_use = 0;
return 0;
}