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
|
/*
* Copyright (c) 2013 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.
*/
/**
* SvcContext - input parameters and state to encode a multi-layered
* spatial SVC frame
*/
#ifndef VPX_SVC_CONTEXT_H_
#define VPX_SVC_CONTEXT_H_
#include "vpx/vp8cx.h"
#include "vpx/vpx_encoder.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef enum SVC_ENCODING_MODE {
INTER_LAYER_PREDICTION_I,
ALT_INTER_LAYER_PREDICTION_IP,
INTER_LAYER_PREDICTION_IP,
USE_GOLDEN_FRAME
} SVC_ENCODING_MODE;
typedef enum SVC_LOG_LEVEL {
SVC_LOG_ERROR,
SVC_LOG_INFO,
SVC_LOG_DEBUG
} SVC_LOG_LEVEL;
typedef struct {
// public interface to svc_command options
int spatial_layers; // number of layers
int first_frame_full_size; // set to one to force first frame full size
SVC_ENCODING_MODE encoding_mode; // svc encoding strategy
SVC_LOG_LEVEL log_level; // amount of information to display
int log_print; // when set, printf log messages instead of returning the
// message with svc_get_message
// private storage for vpx_svc_encode
void *internal;
} SvcContext;
/**
* Set SVC options
* options are supplied as a single string separated by spaces
* Format: encoding-mode=<i|ip|alt-ip|gf>
* layers=<layer_count>
* scaling-factors=<n1>/<d1>,<n2>/<d2>,...
* quantizers=<q1>,<q2>,...
*/
vpx_codec_err_t vpx_svc_set_options(SvcContext *svc_ctx, const char *options);
/**
* Set SVC quantizer values
* values comma separated, ordered from lowest resolution to highest
* e.g., "60,53,39,33,27"
*/
vpx_codec_err_t vpx_svc_set_quantizers(SvcContext *svc_ctx,
const char *quantizer_values);
/**
* Set SVC scale factors
* values comma separated, ordered from lowest resolution to highest
* e.g., "4/16,5/16,7/16,11/16,16/16"
*/
vpx_codec_err_t vpx_svc_set_scale_factors(SvcContext *svc_ctx,
const char *scale_factors);
/**
* initialize SVC encoding
*/
vpx_codec_err_t vpx_svc_init(SvcContext *svc_ctx, vpx_codec_ctx_t *codec_ctx,
vpx_codec_iface_t *iface,
vpx_codec_enc_cfg_t *cfg);
/**
* encode a frame of video with multiple layers
*/
vpx_codec_err_t vpx_svc_encode(SvcContext *svc_ctx, vpx_codec_ctx_t *codec_ctx,
struct vpx_image *rawimg, vpx_codec_pts_t pts,
int64_t duration, int deadline);
/**
* finished with svc encoding, release allocated resources
*/
void vpx_svc_release(SvcContext *svc_ctx);
/**
* dump accumulated statistics and reset accumulated values
*/
const char *vpx_svc_dump_statistics(SvcContext *svc_ctx);
/**
* get status message from previous encode
*/
const char *vpx_svc_get_message(const SvcContext *svc_ctx);
/**
* return size of encoded data to be returned by vpx_svc_get_buffer
*/
size_t vpx_svc_get_frame_size(const SvcContext *svc_ctx);
/**
* return buffer with encoded data
*/
void *vpx_svc_get_buffer(const SvcContext *svc_ctx);
/**
* return spatial resolution of the specified layer
*/
vpx_codec_err_t vpx_svc_get_layer_resolution(const SvcContext *svc_ctx,
int layer,
unsigned int *width,
unsigned int *height);
/**
* return number of frames that have been encoded
*/
int vpx_svc_get_encode_frame_count(const SvcContext *svc_ctx);
/**
* return 1 if last encoded frame was a keyframe
*/
int vpx_svc_is_keyframe(const SvcContext *svc_ctx);
/**
* force the next frame to be a keyframe
*/
void vpx_svc_set_keyframe(SvcContext *svc_ctx);
#ifdef __cplusplus
} // extern "C"
#endif
#endif /* VPX_SVC_CONTEXT_H_ */
|
