1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
/*
* Copyright (c) 2010 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.
*/
/*!\defgroup vp8_decoder WebM VP8/VP9 Decoder
* \ingroup vp8
*
* @{
*/
/*!\file
* \brief Provides definitions for using VP8 or VP9 within the vpx Decoder
* interface.
*/
#ifndef VPX_VP8DX_H_
#define VPX_VP8DX_H_
#ifdef __cplusplus
extern "C" {
#endif
/* Include controls common to both the encoder and decoder */
#include "./vp8.h"
/*!\name Algorithm interface for VP8
*
* This interface provides the capability to decode VP8 streams.
* @{
*/
extern vpx_codec_iface_t vpx_codec_vp8_dx_algo;
extern vpx_codec_iface_t *vpx_codec_vp8_dx(void);
/*!@} - end algorithm interface member group*/
/*!\name Algorithm interface for VP9
*
* This interface provides the capability to decode VP9 streams.
* @{
*/
extern vpx_codec_iface_t vpx_codec_vp9_dx_algo;
extern vpx_codec_iface_t *vpx_codec_vp9_dx(void);
/*!@} - end algorithm interface member group*/
/*!\enum vp8_dec_control_id
* \brief VP8 decoder control functions
*
* This set of macros define the control functions available for the VP8
* decoder interface.
*
* \sa #vpx_codec_control
*/
enum vp8_dec_control_id {
/** control function to get info on which reference frames were updated
* by the last decode
*/
VP8D_GET_LAST_REF_UPDATES = VP8_DECODER_CTRL_ID_START,
/** check if the indicated frame is corrupted */
VP8D_GET_FRAME_CORRUPTED,
/** control function to get info on which reference frames were used
* by the last decode
*/
VP8D_GET_LAST_REF_USED,
/** decryption function to decrypt encoded buffer data immediately
* before decoding. Takes a vpx_decrypt_init, which contains
* a callback function and opaque context pointer.
*/
VPXD_SET_DECRYPTOR,
VP8D_SET_DECRYPTOR = VPXD_SET_DECRYPTOR,
/** control function to get the dimensions that the current frame is decoded
* at. This may be different to the intended display size for the frame as
* specified in the wrapper or frame header (see VP9D_GET_DISPLAY_SIZE). */
VP9D_GET_FRAME_SIZE,
/** control function to get the current frame's intended display dimensions
* (as specified in the wrapper or frame header). This may be different to
* the decoded dimensions of this frame (see VP9D_GET_FRAME_SIZE). */
VP9D_GET_DISPLAY_SIZE,
/** control function to get the bit depth of the stream. */
VP9D_GET_BIT_DEPTH,
/** control function to set the byte alignment of the planes in the reference
* buffers. Valid values are power of 2, from 32 to 1024. A value of 0 sets
* legacy alignment. I.e. Y plane is aligned to 32 bytes, U plane directly
* follows Y plane, and V plane directly follows U plane. Default value is 0.
*/
VP9_SET_BYTE_ALIGNMENT,
/** control function to invert the decoding order to from right to left. The
* function is used in a test to confirm the decoding independence of tile
* columns. The function may be used in application where this order
* of decoding is desired.
*
* TODO(yaowu): Rework the unit test that uses this control, and in a future
* release, this test-only control shall be removed.
*/
VP9_INVERT_TILE_DECODE_ORDER,
/** control function to set the skip loop filter flag. Valid values are
* integers. The decoder will skip the loop filter when its value is set to
* nonzero. If the loop filter is skipped the decoder may accumulate decode
* artifacts. The default value is 0.
*/
VP9_SET_SKIP_LOOP_FILTER,
VP8_DECODER_CTRL_ID_MAX
};
/** Decrypt n bytes of data from input -> output, using the decrypt_state
* passed in VPXD_SET_DECRYPTOR.
*/
typedef void (*vpx_decrypt_cb)(void *decrypt_state, const unsigned char *input,
unsigned char *output, int count);
/*!\brief Structure to hold decryption state
*
* Defines a structure to hold the decryption state and access function.
*/
typedef struct vpx_decrypt_init {
/*! Decrypt callback. */
vpx_decrypt_cb decrypt_cb;
/*! Decryption state. */
void *decrypt_state;
} vpx_decrypt_init;
/*!\brief A deprecated alias for vpx_decrypt_init.
*/
typedef vpx_decrypt_init vp8_decrypt_init;
/*!\brief VP8 decoder control function parameter type
*
* Defines the data types that VP8D control functions take. Note that
* additional common controls are defined in vp8.h
*
*/
VPX_CTRL_USE_TYPE(VP8D_GET_LAST_REF_UPDATES, int *)
VPX_CTRL_USE_TYPE(VP8D_GET_FRAME_CORRUPTED, int *)
VPX_CTRL_USE_TYPE(VP8D_GET_LAST_REF_USED, int *)
VPX_CTRL_USE_TYPE(VPXD_SET_DECRYPTOR, vpx_decrypt_init *)
VPX_CTRL_USE_TYPE(VP8D_SET_DECRYPTOR, vpx_decrypt_init *)
VPX_CTRL_USE_TYPE(VP9D_GET_DISPLAY_SIZE, int *)
VPX_CTRL_USE_TYPE(VP9D_GET_BIT_DEPTH, unsigned int *)
VPX_CTRL_USE_TYPE(VP9D_GET_FRAME_SIZE, int *)
VPX_CTRL_USE_TYPE(VP9_INVERT_TILE_DECODE_ORDER, int)
/*! @} - end defgroup vp8_decoder */
#ifdef __cplusplus
} // extern "C"
#endif
#endif // VPX_VP8DX_H_
|
