exporting qscale data for postprocessing (for MPlayer)
[libav.git] / libavcodec / avcodec.h
1 #ifndef AVCODEC_H
2 #define AVCODEC_H
3
4 #include "common.h"
5
6 enum CodecID {
7 CODEC_ID_NONE,
8 CODEC_ID_MPEG1VIDEO,
9 CODEC_ID_H263,
10 CODEC_ID_RV10,
11 CODEC_ID_MP2,
12 CODEC_ID_AC3,
13 CODEC_ID_MJPEG,
14 CODEC_ID_MPEG4,
15 CODEC_ID_RAWVIDEO,
16 CODEC_ID_MSMPEG4,
17 CODEC_ID_H263P,
18 CODEC_ID_H263I,
19
20 /* various pcm "codecs" */
21 CODEC_ID_PCM_S16LE,
22 CODEC_ID_PCM_S16BE,
23 CODEC_ID_PCM_U16LE,
24 CODEC_ID_PCM_U16BE,
25 CODEC_ID_PCM_S8,
26 CODEC_ID_PCM_U8,
27 CODEC_ID_PCM_MULAW,
28 CODEC_ID_PCM_ALAW,
29 };
30
31 enum CodecType {
32 CODEC_TYPE_VIDEO,
33 CODEC_TYPE_AUDIO,
34 };
35
36 enum PixelFormat {
37 PIX_FMT_YUV420P,
38 PIX_FMT_YUV422,
39 PIX_FMT_RGB24,
40 PIX_FMT_BGR24,
41 PIX_FMT_YUV422P,
42 PIX_FMT_YUV444P,
43 };
44
45 /* currently unused, may be used if 24/32 bits samples ever supported */
46 enum SampleFormat {
47 SAMPLE_FMT_S16 = 0, /* signed 16 bits */
48 };
49
50 /* in bytes */
51 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 18432
52
53 /* motion estimation type */
54 extern int motion_estimation_method;
55 #define ME_ZERO 0
56 #define ME_FULL 1
57 #define ME_LOG 2
58 #define ME_PHODS 3
59
60 /* encoding support */
61
62 #define CODEC_FLAG_HQ 0x0001 /* high quality (non real time) encoding */
63 #define CODEC_FLAG_QSCALE 0x0002 /* use fixed qscale */
64
65 /* codec capabilities */
66
67 /* decoder can use draw_horiz_band callback */
68 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001
69
70 #define FRAME_RATE_BASE 10000
71
72 typedef struct AVCodecContext {
73 int bit_rate;
74 int flags;
75 int sub_id; /* some codecs needs additionnal format info. It is
76 stored there */
77 /* video only */
78 int frame_rate; /* frames per sec multiplied by FRAME_RATE_BASE */
79 int width, height;
80 int gop_size; /* 0 = intra only */
81 int pix_fmt; /* pixel format, see PIX_FMT_xxx */
82
83 /* if non NULL, 'draw_horiz_band' is called by the libavcodec
84 decoder to draw an horizontal band. It improve cache usage. Not
85 all codecs can do that. You must check the codec capabilities
86 before */
87 void (*draw_horiz_band)(struct AVCodecContext *s,
88 UINT8 **src_ptr, int linesize,
89 int y, int width, int height);
90
91 /* audio only */
92 int sample_rate; /* samples per sec */
93 int channels;
94 int sample_fmt; /* sample format, currenly unused */
95
96 /* the following data should not be initialized */
97 int frame_size; /* in samples, initialized when calling 'init' */
98 int frame_number; /* audio or video frame number */
99 int key_frame; /* true if the previous compressed frame was
100 a key frame (intra, or seekable) */
101 int quality; /* quality of the previous encoded frame
102 (between 1 (good) and 31 (bad)) */
103 struct AVCodec *codec;
104 void *priv_data;
105
106 /* the following fields are ignored */
107 void *opaque; /* can be used to carry app specific stuff */
108 char codec_name[32];
109 int codec_type; /* see CODEC_TYPE_xxx */
110 int codec_id; /* see CODEC_ID_xxx */
111 unsigned int codec_tag; /* codec tag, only used if unknown codec */
112 } AVCodecContext;
113
114 typedef struct AVCodec {
115 char *name;
116 int type;
117 int id;
118 int priv_data_size;
119 int (*init)(AVCodecContext *);
120 int (*encode)(AVCodecContext *, UINT8 *buf, int buf_size, void *data);
121 int (*close)(AVCodecContext *);
122 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
123 UINT8 *buf, int buf_size);
124 int capabilities;
125 struct AVCodec *next;
126 } AVCodec;
127
128 /* three components are given, that's all */
129 typedef struct AVPicture {
130 UINT8 *data[3];
131 int linesize[3];
132 } AVPicture;
133
134 extern AVCodec ac3_encoder;
135 extern AVCodec mp2_encoder;
136 extern AVCodec mpeg1video_encoder;
137 extern AVCodec h263_encoder;
138 extern AVCodec h263p_encoder;
139 extern AVCodec rv10_encoder;
140 extern AVCodec mjpeg_encoder;
141 extern AVCodec mpeg4_encoder;
142 extern AVCodec msmpeg4_encoder;
143
144 extern AVCodec h263_decoder;
145 extern AVCodec mpeg4_decoder;
146 extern AVCodec msmpeg4_decoder;
147 extern AVCodec mpeg_decoder;
148 extern AVCodec h263i_decoder;
149 extern AVCodec rv10_decoder;
150 extern AVCodec mjpeg_decoder;
151 extern AVCodec mp3_decoder;
152
153 /* pcm codecs */
154 #define PCM_CODEC(id, name) \
155 extern AVCodec name ## _decoder; \
156 extern AVCodec name ## _encoder;
157
158 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
159 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
160 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
161 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
162 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
163 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
164 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
165 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
166
167 #undef PCM_CODEC
168
169 /* dummy raw video codec */
170 extern AVCodec rawvideo_codec;
171
172 /* the following codecs use external GPL libs */
173 extern AVCodec ac3_decoder;
174
175 /* resample.c */
176
177 struct ReSampleContext;
178
179 typedef struct ReSampleContext ReSampleContext;
180
181 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
182 int output_rate, int input_rate);
183 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
184 void audio_resample_close(ReSampleContext *s);
185
186 /* YUV420 format is assumed ! */
187
188 struct ImgReSampleContext;
189
190 typedef struct ImgReSampleContext ImgReSampleContext;
191
192 ImgReSampleContext *img_resample_init(int output_width, int output_height,
193 int input_width, int input_height);
194 void img_resample(ImgReSampleContext *s,
195 AVPicture *output, AVPicture *input);
196
197 void img_resample_close(ImgReSampleContext *s);
198
199 void avpicture_fill(AVPicture *picture, UINT8 *ptr,
200 int pix_fmt, int width, int height);
201 int avpicture_get_size(int pix_fmt, int width, int height);
202
203 /* convert among pixel formats */
204 int img_convert(AVPicture *dst, int dst_pix_fmt,
205 AVPicture *src, int pix_fmt,
206 int width, int height);
207
208 /* deinterlace a picture */
209 int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
210 int pix_fmt, int width, int height);
211
212 /* external high level API */
213
214 extern AVCodec *first_avcodec;
215
216 void avcodec_init(void);
217
218 void register_avcodec(AVCodec *format);
219 AVCodec *avcodec_find_encoder(enum CodecID id);
220 AVCodec *avcodec_find_decoder(enum CodecID id);
221 AVCodec *avcodec_find_decoder_by_name(const char *name);
222 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
223
224 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
225 int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
226 int *frame_size_ptr,
227 UINT8 *buf, int buf_size);
228 int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture,
229 int *got_picture_ptr,
230 UINT8 *buf, int buf_size);
231 int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
232 const short *samples);
233 int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
234 const AVPicture *pict);
235
236 int avcodec_close(AVCodecContext *avctx);
237
238 void avcodec_register_all(void);
239
240 #ifdef FF_POSTPROCESS
241 #ifndef MBC
242 #define MBC 48
243 #define MBR 36
244 #endif
245 extern int quant_store[MBR+1][MBC+1]; // [Review]
246 #endif
247
248 #endif /* AVCODEC_H */