87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
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/*
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* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <assert.h>
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#include "vp9/common/vp9_frame_buffers.h"
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#include "vpx_mem/vpx_mem.h"
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int vp9_alloc_internal_frame_buffers(InternalFrameBufferList *list) {
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assert(list != NULL);
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vp9_free_internal_frame_buffers(list);
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list->num_internal_frame_buffers =
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VP9_MAXIMUM_REF_BUFFERS + VPX_MAXIMUM_WORK_BUFFERS;
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list->int_fb =
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(InternalFrameBuffer *)vpx_calloc(list->num_internal_frame_buffers,
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sizeof(*list->int_fb));
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return (list->int_fb == NULL);
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}
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void vp9_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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vpx_free(list->int_fb[i].data);
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list->int_fb[i].data = NULL;
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}
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vpx_free(list->int_fb);
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list->int_fb = NULL;
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}
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int vp9_get_frame_buffer(void *cb_priv, size_t min_size,
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vpx_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)
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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)
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break;
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}
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if (i == int_fb_list->num_internal_frame_buffers)
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return -1;
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if (int_fb_list->int_fb[i].size < min_size) {
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int_fb_list->int_fb[i].data =
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(uint8_t *)vpx_realloc(int_fb_list->int_fb[i].data, min_size);
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if (!int_fb_list->int_fb[i].data)
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return -1;
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// This memset is needed for fixing valgrind error from C loop filter
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// due to access uninitialized memory in frame border. It could be
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// removed if border is totally removed.
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memset(int_fb_list->int_fb[i].data, 0, min_size);
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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 vp9_release_frame_buffer(void *cb_priv, vpx_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)
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int_fb->in_use = 0;
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return 0;
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}
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