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
|
/*
* generic decoding-related code
*
* 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_DECODE_H
#define AVCODEC_DECODE_H
#include "libavutil/buffer.h"
#include "libavutil/frame.h"
#include "libavutil/hwcontext.h"
#include "avcodec.h"
/**
* This struct stores per-frame lavc-internal data and is attached to it via
* private_ref.
*/
typedef struct FrameDecodeData {
/**
* The callback to perform some delayed processing on the frame right
* before it is returned to the caller.
*
* @note This code is called at some unspecified point after the frame is
* returned from the decoder's decode/receive_frame call. Therefore it cannot rely
* on AVCodecContext being in any specific state, so it does not get to
* access AVCodecContext directly at all. All the state it needs must be
* stored in the post_process_opaque object.
*/
int (*post_process)(void *logctx, AVFrame *frame);
void *post_process_opaque;
void (*post_process_opaque_free)(void *opaque);
/**
* Per-frame private data for hwaccels.
*/
void *hwaccel_priv;
void (*hwaccel_priv_free)(void *priv);
} FrameDecodeData;
/**
* Called by decoders to get the next packet for decoding.
*
* @param pkt An empty packet to be filled with data.
* @return 0 if a new reference has been successfully written to pkt
* AVERROR(EAGAIN) if no data is currently available
* AVERROR_EOF if and end of stream has been reached, so no more data
* will be available
*/
int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt);
/**
* Set various frame properties from the codec context / packet data.
*/
int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame);
/**
* Make sure avctx.hw_frames_ctx is set. If it's not set, the function will
* try to allocate it from hw_device_ctx. If that is not possible, an error
* message is printed, and an error code is returned.
*/
int ff_decode_get_hw_frames_ctx(AVCodecContext *avctx,
enum AVHWDeviceType dev_type);
int ff_attach_decode_data(AVFrame *frame);
/**
* Perform decoder initialization and validation.
* Called when opening the decoder, before the AVCodec.init() call.
*/
int ff_decode_preinit(AVCodecContext *avctx);
#endif /* AVCODEC_DECODE_H */
|
