3063c37600
It only handles the realloc constraint (preserving low elements) by serendipity, and we don't actually rely on that behavior anyway. Meanwhile the calls may do extra copying that gets immediately clobbered by the callers. Change-Id: I8dfa89e4a81084b084889c27bd272fdf85184e8d
79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/*
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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 = (InternalFrameBuffer *)vpx_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 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) 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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vpx_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 *)vpx_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 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) int_fb->in_use = 0;
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return 0;
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}
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