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
|
/*
* Copyright (c) 2011 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.
*/
#ifndef VP8_ENCODER_LOOKAHEAD_H_
#define VP8_ENCODER_LOOKAHEAD_H_
#include "vpx_scale/yv12config.h"
#include "vpx/vpx_integer.h"
#ifdef __cplusplus
extern "C" {
#endif
struct lookahead_entry
{
YV12_BUFFER_CONFIG img;
int64_t ts_start;
int64_t ts_end;
unsigned int flags;
};
struct lookahead_ctx;
/**\brief Initializes the lookahead stage
*
* The lookahead stage is a queue of frame buffers on which some analysis
* may be done when buffers are enqueued.
*
*
*/
struct lookahead_ctx* vp8_lookahead_init(unsigned int width,
unsigned int height,
unsigned int depth
);
/**\brief Destroys the lookahead stage
*
*/
void vp8_lookahead_destroy(struct lookahead_ctx *ctx);
/**\brief Enqueue a source buffer
*
* This function will copy the source image into a new framebuffer with
* the expected stride/border.
*
* If active_map is non-NULL and there is only one frame in the queue, then copy
* only active macroblocks.
*
* \param[in] ctx Pointer to the lookahead context
* \param[in] src Pointer to the image to enqueue
* \param[in] ts_start Timestamp for the start of this frame
* \param[in] ts_end Timestamp for the end of this frame
* \param[in] flags Flags set on this frame
* \param[in] active_map Map that specifies which macroblock is active
*/
int
vp8_lookahead_push(struct lookahead_ctx *ctx,
YV12_BUFFER_CONFIG *src,
int64_t ts_start,
int64_t ts_end,
unsigned int flags,
unsigned char *active_map);
/**\brief Get the next source buffer to encode
*
*
* \param[in] ctx Pointer to the lookahead context
* \param[in] drain Flag indicating the buffer should be drained
* (return a buffer regardless of the current queue depth)
*
* \retval NULL, if drain set and queue is empty
* \retval NULL, if drain not set and queue not of the configured depth
*
*/
struct lookahead_entry*
vp8_lookahead_pop(struct lookahead_ctx *ctx,
int drain);
#define PEEK_FORWARD 1
#define PEEK_BACKWARD -1
/**\brief Get a future source buffer to encode
*
* \param[in] ctx Pointer to the lookahead context
* \param[in] index Index of the frame to be returned, 0 == next frame
*
* \retval NULL, if no buffer exists at the specified index
*
*/
struct lookahead_entry*
vp8_lookahead_peek(struct lookahead_ctx *ctx,
unsigned int index,
int direction);
/**\brief Get the number of frames currently in the lookahead queue
*
* \param[in] ctx Pointer to the lookahead context
*/
unsigned int
vp8_lookahead_depth(struct lookahead_ctx *ctx);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // VP8_ENCODER_LOOKAHEAD_H_
|
