1 /* 2 * Copyright (c) 2014 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include <assert.h> 12 13 #include "vp9/common/vp9_frame_buffers.h" 14 #include "vpx_mem/vpx_mem.h" 15 vp9_alloc_internal_frame_buffers(InternalFrameBufferList * list)16int vp9_alloc_internal_frame_buffers(InternalFrameBufferList *list) { 17 assert(list != NULL); 18 vp9_free_internal_frame_buffers(list); 19 20 list->num_internal_frame_buffers = 21 VP9_MAXIMUM_REF_BUFFERS + VPX_MAXIMUM_WORK_BUFFERS; 22 list->int_fb = 23 (InternalFrameBuffer *)vpx_calloc(list->num_internal_frame_buffers, 24 sizeof(*list->int_fb)); 25 return (list->int_fb == NULL); 26 } 27 vp9_free_internal_frame_buffers(InternalFrameBufferList * list)28void vp9_free_internal_frame_buffers(InternalFrameBufferList *list) { 29 int i; 30 31 assert(list != NULL); 32 33 for (i = 0; i < list->num_internal_frame_buffers; ++i) { 34 vpx_free(list->int_fb[i].data); 35 list->int_fb[i].data = NULL; 36 } 37 vpx_free(list->int_fb); 38 list->int_fb = NULL; 39 } 40 vp9_get_frame_buffer(void * cb_priv,size_t min_size,vpx_codec_frame_buffer_t * fb)41int vp9_get_frame_buffer(void *cb_priv, size_t min_size, 42 vpx_codec_frame_buffer_t *fb) { 43 int i; 44 InternalFrameBufferList *const int_fb_list = 45 (InternalFrameBufferList *)cb_priv; 46 if (int_fb_list == NULL) 47 return -1; 48 49 // Find a free frame buffer. 50 for (i = 0; i < int_fb_list->num_internal_frame_buffers; ++i) { 51 if (!int_fb_list->int_fb[i].in_use) 52 break; 53 } 54 55 if (i == int_fb_list->num_internal_frame_buffers) 56 return -1; 57 58 if (int_fb_list->int_fb[i].size < min_size) { 59 int_fb_list->int_fb[i].data = 60 (uint8_t *)vpx_realloc(int_fb_list->int_fb[i].data, min_size); 61 if (!int_fb_list->int_fb[i].data) 62 return -1; 63 64 int_fb_list->int_fb[i].size = min_size; 65 } 66 67 fb->data = int_fb_list->int_fb[i].data; 68 fb->size = int_fb_list->int_fb[i].size; 69 int_fb_list->int_fb[i].in_use = 1; 70 71 // Set the frame buffer's private data to point at the internal frame buffer. 72 fb->priv = &int_fb_list->int_fb[i]; 73 return 0; 74 } 75 vp9_release_frame_buffer(void * cb_priv,vpx_codec_frame_buffer_t * fb)76int vp9_release_frame_buffer(void *cb_priv, vpx_codec_frame_buffer_t *fb) { 77 InternalFrameBuffer *const int_fb = (InternalFrameBuffer *)fb->priv; 78 (void)cb_priv; 79 int_fb->in_use = 0; 80 return 0; 81 } 82