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
169
170
171
172
173
174
175
176
177
|
#include "common.h"
enum CodecID {
CODEC_ID_NONE,
CODEC_ID_MPEG1VIDEO,
CODEC_ID_H263,
CODEC_ID_RV10,
CODEC_ID_MP2,
CODEC_ID_AC3,
CODEC_ID_MJPEG,
CODEC_ID_OPENDIVX,
CODEC_ID_PCM,
CODEC_ID_RAWVIDEO,
CODEC_ID_MSMPEG4,
CODEC_ID_H263P,
CODEC_ID_H263I,
};
enum CodecType {
CODEC_TYPE_VIDEO,
CODEC_TYPE_AUDIO,
};
enum PixelFormat {
PIX_FMT_YUV420P,
PIX_FMT_YUV422,
PIX_FMT_RGB24,
PIX_FMT_BGR24,
};
/* in bytes */
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 18432
/* motion estimation type */
extern int motion_estimation_method;
#define ME_ZERO 0
#define ME_FULL 1
#define ME_LOG 2
#define ME_PHODS 3
/* encoding support */
#define CODEC_FLAG_HQ 0x0001 /* high quality (non real time) encoding */
#define CODEC_FLAG_QSCALE 0x0002 /* use fixed qscale */
#define FRAME_RATE_BASE 10000
typedef struct AVCodecContext {
int bit_rate;
int flags;
int sub_id; /* some codecs needs additionnal format info. It is
stored there */
/* video only */
int frame_rate; /* frames per sec multiplied by FRAME_RATE_BASE */
int width, height;
int gop_size; /* 0 = intra only */
int pix_fmt; /* pixel format, see PIX_FMT_xxx */
/* audio only */
int sample_rate; /* samples per sec */
int channels;
/* the following data should not be initialized */
int frame_size; /* in samples, initialized when calling 'init' */
int frame_number; /* audio or video frame number */
int key_frame; /* true if the previous compressed frame was
a key frame (intra, or seekable) */
int quality; /* quality of the previous encoded frame
(between 1 (good) and 31 (bad)) */
struct AVCodec *codec;
void *priv_data;
/* the following fields are ignored */
char codec_name[32];
int codec_type; /* see CODEC_TYPE_xxx */
int codec_id; /* see CODEC_ID_xxx */
unsigned int codec_tag; /* codec tag, only used if unknown codec */
} AVCodecContext;
typedef struct AVCodec {
char *name;
int type;
int id;
int priv_data_size;
int (*init)(AVCodecContext *);
int (*encode)(AVCodecContext *, UINT8 *buf, int buf_size, void *data);
int (*close)(AVCodecContext *);
int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
UINT8 *buf, int buf_size);
struct AVCodec *next;
} AVCodec;
/* three components are given, that's all */
typedef struct AVPicture {
UINT8 *data[3];
int linesize[3];
} AVPicture;
extern AVCodec ac3_encoder;
extern AVCodec mp2_encoder;
extern AVCodec mpeg1video_encoder;
extern AVCodec h263_encoder;
extern AVCodec h263p_encoder;
extern AVCodec rv10_encoder;
extern AVCodec mjpeg_encoder;
extern AVCodec opendivx_encoder;
extern AVCodec msmpeg4_encoder;
extern AVCodec h263_decoder;
extern AVCodec opendivx_decoder;
extern AVCodec msmpeg4_decoder;
extern AVCodec mpeg_decoder;
extern AVCodec h263i_decoder;
extern AVCodec rv10_decoder;
/* dummy raw codecs */
extern AVCodec pcm_codec;
extern AVCodec rawvideo_codec;
/* the following codecs use external GPL libs */
extern AVCodec mp3_decoder;
extern AVCodec ac3_decoder;
/* resample.c */
struct ReSampleContext;
typedef struct ReSampleContext ReSampleContext;
ReSampleContext *audio_resample_init(int output_channels, int input_channels,
int output_rate, int input_rate);
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
void audio_resample_close(ReSampleContext *s);
/* YUV420 format is assumed ! */
struct ImgReSampleContext;
typedef struct ImgReSampleContext ImgReSampleContext;
ImgReSampleContext *img_resample_init(int output_width, int output_height,
int input_width, int input_height);
void img_resample(ImgReSampleContext *s,
AVPicture *output, AVPicture *input);
void img_resample_close(ImgReSampleContext *s);
int img_convert_to_yuv420(UINT8 *img_out, UINT8 *img,
int pix_fmt, int width, int height);
/* external high level API */
extern AVCodec *first_avcodec;
void avcodec_init(void);
void register_avcodec(AVCodec *format);
AVCodec *avcodec_find_encoder(enum CodecID id);
AVCodec *avcodec_find_decoder(enum CodecID id);
AVCodec *avcodec_find_decoder_by_name(const char *name);
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
int *frame_size_ptr,
UINT8 *buf, int buf_size);
int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture,
int *got_picture_ptr,
UINT8 *buf, int buf_size);
int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
const short *samples);
int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
const AVPicture *pict);
int avcodec_close(AVCodecContext *avctx);
void avcodec_register_all(void);
void avcodec_register_more(void);
|
