aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/vda.h
blob: 6e9de9cd0a46bf7f8512563d5a8f709ddac29b52 (plain) (blame)
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
167
168
/*
 * VDA HW acceleration
 *
 * copyright (c) 2011 Sebastien Zwickert
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVCODEC_VDA_H
#define AVCODEC_VDA_H

#include <pthread.h>
#include <stdint.h>

// emmintrin.h is unable to compile with -std=c99 -Werror=missing-prototypes
// http://openradar.appspot.com/8026390
#undef __GNUC_STDC_INLINE__

#define Picture QuickdrawPicture
#include <VideoDecodeAcceleration/VDADecoder.h>
#undef Picture

/**
 *  This structure is used to store a decoded frame information and data.
 */
typedef struct {
    /**
    * The PTS of the frame.
    *
    * - encoding: unused
    * - decoding: Set/Unset by libavcodec.
    */
    int64_t             pts;

    /**
    * The CoreVideo buffer that contains the decoded data.
    *
    * - encoding: unused
    * - decoding: Set/Unset by libavcodec.
    */
    CVPixelBufferRef    cv_buffer;

    /**
    * A pointer to the next frame.
    *
    * - encoding: unused
    * - decoding: Set/Unset by libavcodec.
    */
    struct vda_frame    *next_frame;
} vda_frame;

/**
 * This structure is used to provide the necessary configurations and data
 * to the VDA FFmpeg HWAccel implementation.
 *
 * The application must make it available as AVCodecContext.hwaccel_context.
 */
struct vda_context {
    /**
    * VDA decoder object.
    *
    * - encoding: unused
    * - decoding: Set/Unset by libavcodec.
    */
    VDADecoder          decoder;

    /**
    * VDA frames queue ordered by presentation timestamp.
    *
    * - encoding: unused
    * - decoding: Set/Unset by libavcodec.
    */
    vda_frame           *queue;

    /**
    * Mutex for locking queue operations.
    *
    * - encoding: unused
    * - decoding: Set/Unset by libavcodec.
    */
    pthread_mutex_t     queue_mutex;

    /**
    * The frame width.
    *
    * - encoding: unused
    * - decoding: Set/Unset by user.
    */
    int                 width;

    /**
    * The frame height.
    *
    * - encoding: unused
    * - decoding: Set/Unset by user.
    */
    int                 height;

    /**
    * The frame format.
    *
    * - encoding: unused
    * - decoding: Set/Unset by user.
    */
    int                 format;

    /**
    * The pixel format for output image buffers.
    *
    * - encoding: unused
    * - decoding: Set/Unset by user.
    */
    OSType              cv_pix_fmt_type;

    /**
    * The current bitstream buffer.
    *
    * - encoding: unused
    * - decoding: Set/Unset by libavcodec.
    */
    uint8_t             *bitstream;

    /**
    * The current size of the bitstream.
    *
    * - encoding: unused
    * - decoding: Set/Unset by libavcodec.
    */
    int                 bitstream_size;

    /**
    * The reference size used for fast reallocation.
    *
    * - encoding: unused
    * - decoding: Set/Unset by libavcodec.
    */
    int                 ref_size;
};

/** Create the video decoder. */
int ff_vda_create_decoder(struct vda_context *vda_ctx,
                          uint8_t *extradata,
                          int extradata_size);

/** Destroy the video decoder. */
int ff_vda_destroy_decoder(struct vda_context *vda_ctx);

/** Return the top frame of the queue. */
vda_frame *ff_vda_queue_pop(struct vda_context *vda_ctx);

/** Release the given frame. */
void ff_vda_release_vda_frame(vda_frame *frame);

#endif /* AVCODEC_VDA_H */