ref: b12e353424cdb71b0b5807931508ca167bbdc71b
dir: /vp9/common/vp9_frame_buffers.c/
/* * 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) { assert(list != NULL); vp9_free_internal_frame_buffers(list); list->num_internal_frame_buffers = VP9_MAXIMUM_REF_BUFFERS + VPX_MAXIMUM_WORK_BUFFERS; list->int_fb = (InternalFrameBuffer *)vpx_calloc(list->num_internal_frame_buffers, sizeof(*list->int_fb)); return (list->int_fb == NULL); } 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; } 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) { int_fb_list->int_fb[i].data = (uint8_t *)vpx_realloc(int_fb_list->int_fb[i].data, min_size); if (!int_fb_list->int_fb[i].data) return -1; // This memset is needed for fixing valgrind error from C loop filter // due to access uninitialized memory in frame border. It could be // removed if border is totally removed. memset(int_fb_list->int_fb[i].data, 0, min_size); 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; }