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/*
* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <assert.h>
#include "vp9/common/vp9_frame_buffers.h"
#include "vpx_mem/vpx_mem.h"
int vp9_alloc_internal_frame_buffers(InternalFrameBufferList *list) {
const int num_buffers = VP9_MAXIMUM_REF_BUFFERS + VPX_MAXIMUM_WORK_BUFFERS;
assert(list != NULL);
vp9_free_internal_frame_buffers(list);
list->int_fb =
(InternalFrameBuffer *)vpx_calloc(num_buffers, sizeof(*list->int_fb));
if (list->int_fb) {
list->num_internal_frame_buffers = num_buffers;
return 0;
}
return -1;
}
void vp9_free_internal_frame_buffers(InternalFrameBufferList *list) {
int i;
assert(list != NULL);
for (i = 0; i < list->num_internal_frame_buffers; ++i) {
vpx_free(list->int_fb[i].data);
list->int_fb[i].data = NULL;
}
vpx_free(list->int_fb);
list->int_fb = NULL;
list->num_internal_frame_buffers = 0;
}
int vp9_get_frame_buffer(void *cb_priv, size_t min_size,
vpx_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) {
vpx_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 *)vpx_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 vp9_release_frame_buffer(void *cb_priv, vpx_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;
}
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