AOMedia AV1 Codec: aom_scale/yv12config.h Source File

| AOMedia AV1 Codec

yv12config.h
1/*
2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved.
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
11
12#ifndef AOM_AOM_SCALE_YV12CONFIG_H_
13#define AOM_AOM_SCALE_YV12CONFIG_H_
14
15#ifdef __cplusplus
16extern "C" {
17#endif
18
19#include <stdbool.h>
20
21#include "config/aom_config.h"
22
23#include "aom/aom_codec.h"
24#include "aom/aom_frame_buffer.h"
25#include "aom/aom_integer.h"
26#include "aom/internal/aom_image_internal.h"
27
29
30#define AOMINNERBORDERINPIXELS 160
31#define AOM_INTERP_EXTEND 4
32#define AOM_BORDER_IN_PIXELS 288
33#define AOM_ENC_NO_SCALE_BORDER 160
34#define AOM_ENC_ALLINTRA_BORDER 64
35#define AOM_DEC_BORDER_IN_PIXELS 64
36
37#if CONFIG_AV1_ENCODER && !CONFIG_REALTIME_ONLY
38struct image_pyramid;
39struct corner_list;
40#endif // CONFIG_AV1_ENCODER && !CONFIG_REALTIME_ONLY
41
46 typedef struct yv12_buffer_config {
48 union {
49 struct {
50 // The aligned frame width of luma.
51 // It is aligned to a multiple of 8:
52 // y_width = (y_crop_width + 7) & ~7
53 int y_width;
54 // The aligned frame width of chroma.
55 // uv_width = y_width >> subsampling_x
56 int uv_width;
57 };
58 int widths[2];
59 };
60 union {
61 struct {
62 // The aligned frame height of luma.
63 // It is aligned to a multiple of 8:
64 // y_height = (y_crop_height + 7) & ~7
65 int y_height;
66 // The aligned frame height of chroma.
67 // uv_height = y_height >> subsampling_y
68 int uv_height;
69 };
70 int heights[2];
71 };
72 // The frame size en/decoded by AV1
73 union {
74 struct {
75 int y_crop_width;
76 int uv_crop_width;
77 };
78 int crop_widths[2];
79 };
80 union {
81 struct {
82 int y_crop_height;
83 int uv_crop_height;
84 };
85 int crop_heights[2];
86 };
87 union {
88 struct {
89 int y_stride;
90 int uv_stride;
91 };
92 int strides[2];
93 };
94 union {
95 struct {
96 uint8_t *y_buffer;
97 uint8_t *u_buffer;
98 uint8_t *v_buffer;
99 };
100 uint8_t *buffers[3];
101 };
102
103 // Indicate whether y_buffer, u_buffer, and v_buffer points to the internally
104 // allocated memory or external buffers.
105 int use_external_reference_buffers;
106 // This is needed to store y_buffer, u_buffer, and v_buffer when set reference
107 // uses an external refernece, and restore those buffer pointers after the
108 // external reference frame is no longer used.
109 uint8_t *store_buf_adr[3];
110
111 // Global motion search data
112#if CONFIG_AV1_ENCODER && !CONFIG_REALTIME_ONLY
113 // 8-bit downsampling pyramid for the Y plane
114 struct image_pyramid *y_pyramid;
115 struct corner_list *corners;
116#endif // CONFIG_AV1_ENCODER && !CONFIG_REALTIME_ONLY
117
118 uint8_t *buffer_alloc;
119 size_t buffer_alloc_sz;
120 int border;
121 size_t frame_size;
122 int subsampling_x;
123 int subsampling_y;
124 unsigned int bit_depth;
125 aom_color_primaries_t color_primaries;
126 aom_transfer_characteristics_t transfer_characteristics;
127 aom_matrix_coefficients_t matrix_coefficients;
128 uint8_t monochrome;
129 aom_chroma_sample_position_t chroma_sample_position;
130 aom_color_range_t color_range;
131 int render_width;
132 int render_height;
133
134 int corrupted;
135 int flags;
136 aom_metadata_array_t *metadata;
138} YV12_BUFFER_CONFIG;
139
141
142#define YV12_FLAG_HIGHBITDEPTH 8
143
144// Allocate a frame buffer
145//
146// If ybf currently contains an image, all associated memory will be freed and
147// then reallocated. In contrast, aom_realloc_frame_buffer() will reuse any
148// existing allocations where possible. So, if ybf is likely to already be
149// set up, please consider aom_realloc_frame_buffer() instead.
150//
151// See aom_realloc_frame_buffer() for the meanings of the arguments, and
152// available return values.
153int aom_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height,
154 int ss_x, int ss_y, int use_highbitdepth, int border,
155 int byte_alignment, bool alloc_pyramid,
156 int alloc_y_plane_only);
157
158// Updates the yv12 buffer config with the frame buffer. |byte_alignment| must
159// be a power of 2, from 32 to 1024. 0 sets legacy alignment. If cb is not
160// NULL, then libaom is using the frame buffer callbacks to handle memory.
161// If cb is not NULL, libaom will call cb with minimum size in bytes needed
162// to decode the current frame. If cb is NULL, libaom will allocate memory
163// internally to decode the current frame.
164//
165// If alloc_pyramid is true, then an image pyramid will be allocated
166// for use in global motion estimation. This is only needed if this frame
167// buffer will be used to store a source frame or a reference frame in
168// the encoder. Any other framebuffers (eg, intermediates for filtering,
169// or any buffer in the decoder) can set alloc_pyramid = false.
170//
171// Returns 0 on success. Returns < 0 on failure.
172int aom_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height,
173 int ss_x, int ss_y, int use_highbitdepth,
174 int border, int byte_alignment,
175 aom_codec_frame_buffer_t *fb,
176 aom_get_frame_buffer_cb_fn_t cb, void *cb_priv,
177 bool alloc_pyramid, int alloc_y_plane_only);
178
179int aom_free_frame_buffer(YV12_BUFFER_CONFIG *ybf);
180
189void aom_remove_metadata_from_frame_buffer(YV12_BUFFER_CONFIG *ybf);
190
204int aom_copy_metadata_to_frame_buffer(YV12_BUFFER_CONFIG *ybf,
205 const aom_metadata_array_t *arr);
206
215static inline int aom_calc_y_stride(int aligned_width, int border) {
216 return ((aligned_width + 2 * border) + 31) & ~31;
217}
218
219#ifdef __cplusplus
220}
221#endif
222
223#endif // AOM_AOM_SCALE_YV12CONFIG_H_
aom_codec.h
Describes the codec algorithm interface to applications.
aom_frame_buffer.h
Describes the decoder external frame buffer interface.
aom_get_frame_buffer_cb_fn_t
int(* aom_get_frame_buffer_cb_fn_t)(void *priv, size_t min_size, aom_codec_frame_buffer_t *fb)
get frame buffer callback prototype
Definition aom_frame_buffer.h:64
aom_codec_frame_buffer_t
struct aom_codec_frame_buffer aom_codec_frame_buffer_t
External frame buffer.
aom_chroma_sample_position_t
enum aom_chroma_sample_position aom_chroma_sample_position_t
List of chroma sample positions.
aom_metadata_array_t
struct aom_metadata_array aom_metadata_array_t
Array of aom_metadata structs for an image.
Definition aom_image.h:200
aom_transfer_characteristics_t
enum aom_transfer_characteristics aom_transfer_characteristics_t
List of supported transfer functions.
aom_color_range_t
enum aom_color_range aom_color_range_t
List of supported color range.
aom_color_primaries_t
enum aom_color_primaries aom_color_primaries_t
List of supported color primaries.
aom_matrix_coefficients_t
enum aom_matrix_coefficients aom_matrix_coefficients_t
List of supported matrix coefficients.
yv12_buffer_config
YV12 frame buffer data structure.
Definition yv12config.h:46