21 /* various pcm "codecs" */
46 /* currently unused, may be used if 24/32 bits samples ever supported */
48 SAMPLE_FMT_S16 = 0, /* signed 16 bits */
52 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 18432
54 /* motion estimation type */
55 extern int motion_estimation_method;
63 /* encoding support */
65 #define CODEC_FLAG_HQ 0x0001 /* high quality (non real time) encoding */
66 #define CODEC_FLAG_QSCALE 0x0002 /* use fixed qscale */
68 /* codec capabilities */
70 /* decoder can use draw_horiz_band callback */
71 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001
73 #define FRAME_RATE_BASE 10000
75 typedef struct AVCodecContext {
77 int bit_rate_tolerance; /* amount of +- bits (>0)*/
79 int sub_id; /* some codecs needs additionnal format info. It is
82 int frame_rate; /* frames per sec multiplied by FRAME_RATE_BASE */
84 int gop_size; /* 0 = intra only */
85 int pix_fmt; /* pixel format, see PIX_FMT_xxx */
87 /* if non NULL, 'draw_horiz_band' is called by the libavcodec
88 decoder to draw an horizontal band. It improve cache usage. Not
89 all codecs can do that. You must check the codec capabilities
91 void (*draw_horiz_band)(struct AVCodecContext *s,
92 UINT8 **src_ptr, int linesize,
93 int y, int width, int height);
96 int sample_rate; /* samples per sec */
98 int sample_fmt; /* sample format, currenly unused */
100 /* the following data should not be initialized */
101 int frame_size; /* in samples, initialized when calling 'init' */
102 int frame_number; /* audio or video frame number */
103 int key_frame; /* true if the previous compressed frame was
104 a key frame (intra, or seekable) */
105 int quality; /* quality of the previous encoded frame
106 (between 1 (good) and 31 (bad)) */
107 float qcompress; /* amount of qscale change between easy & hard scenes (0.0-1.0)*/
108 float qblur; /* amount of qscale smoothing over time (0.0-1.0) */
109 int qmin; /* min qscale */
110 int qmax; /* max qscale */
111 int max_qdiff; /* max qscale difference between frames */
113 struct AVCodec *codec;
116 /* The following data is for RTP friendly coding */
117 /* By now only H.263/H.263+ coder honours this */
118 int rtp_mode; /* 1 for activate RTP friendly-mode */
119 /* highers numbers represent more error-prone */
120 /* enviroments, by now just "1" exist */
122 int rtp_payload_size; /* The size of the RTP payload, the coder will */
123 /* do it's best to deliver a chunk with size */
124 /* below rtp_payload_size, the chunk will start */
125 /* with a start code on some codecs like H.263 */
126 /* This doesn't take account of any particular */
127 /* headers inside the transmited RTP payload */
130 /* The RTP callcack: This function is called */
131 /* every time the encoder as a packet to send */
132 /* Depends on the encoder if the data starts */
133 /* with a Start Code (it should) H.263 does */
134 void (*rtp_callback)(void *data, int size, int packet_number);
136 /* These are for PSNR calculation, if you set get_psnr to 1 */
137 /* after encoding you will have the PSNR on psnr_y/cb/cr */
143 /* the following fields are ignored */
144 void *opaque; /* can be used to carry app specific stuff */
146 int codec_type; /* see CODEC_TYPE_xxx */
147 int codec_id; /* see CODEC_ID_xxx */
148 unsigned int codec_tag; /* codec tag, only used if unknown codec */
151 typedef struct AVCodec {
156 int (*init)(AVCodecContext *);
157 int (*encode)(AVCodecContext *, UINT8 *buf, int buf_size, void *data);
158 int (*close)(AVCodecContext *);
159 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
160 UINT8 *buf, int buf_size);
162 struct AVCodec *next;
165 /* three components are given, that's all */
166 typedef struct AVPicture {
171 extern AVCodec ac3_encoder;
172 extern AVCodec mp2_encoder;
173 extern AVCodec mp3lame_encoder;
174 extern AVCodec mpeg1video_encoder;
175 extern AVCodec h263_encoder;
176 extern AVCodec h263p_encoder;
177 extern AVCodec rv10_encoder;
178 extern AVCodec mjpeg_encoder;
179 extern AVCodec mpeg4_encoder;
180 extern AVCodec msmpeg4_encoder;
182 extern AVCodec h263_decoder;
183 extern AVCodec mpeg4_decoder;
184 extern AVCodec msmpeg4_decoder;
185 extern AVCodec mpeg_decoder;
186 extern AVCodec h263i_decoder;
187 extern AVCodec rv10_decoder;
188 extern AVCodec mjpeg_decoder;
189 extern AVCodec mp3_decoder;
192 #define PCM_CODEC(id, name) \
193 extern AVCodec name ## _decoder; \
194 extern AVCodec name ## _encoder;
196 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
197 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
198 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
199 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
200 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
201 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
202 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
203 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
207 /* dummy raw video codec */
208 extern AVCodec rawvideo_codec;
210 /* the following codecs use external GPL libs */
211 extern AVCodec ac3_decoder;
215 struct ReSampleContext;
217 typedef struct ReSampleContext ReSampleContext;
219 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
220 int output_rate, int input_rate);
221 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
222 void audio_resample_close(ReSampleContext *s);
224 /* YUV420 format is assumed ! */
226 struct ImgReSampleContext;
228 typedef struct ImgReSampleContext ImgReSampleContext;
230 ImgReSampleContext *img_resample_init(int output_width, int output_height,
231 int input_width, int input_height);
232 void img_resample(ImgReSampleContext *s,
233 AVPicture *output, AVPicture *input);
235 void img_resample_close(ImgReSampleContext *s);
237 void avpicture_fill(AVPicture *picture, UINT8 *ptr,
238 int pix_fmt, int width, int height);
239 int avpicture_get_size(int pix_fmt, int width, int height);
241 /* convert among pixel formats */
242 int img_convert(AVPicture *dst, int dst_pix_fmt,
243 AVPicture *src, int pix_fmt,
244 int width, int height);
246 /* deinterlace a picture */
247 int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
248 int pix_fmt, int width, int height);
250 /* external high level API */
252 extern AVCodec *first_avcodec;
254 void avcodec_init(void);
256 void register_avcodec(AVCodec *format);
257 AVCodec *avcodec_find_encoder(enum CodecID id);
258 AVCodec *avcodec_find_encoder_by_name(const char *name);
259 AVCodec *avcodec_find_decoder(enum CodecID id);
260 AVCodec *avcodec_find_decoder_by_name(const char *name);
261 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
263 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
264 int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
266 UINT8 *buf, int buf_size);
267 int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture,
268 int *got_picture_ptr,
269 UINT8 *buf, int buf_size);
270 int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
271 const short *samples);
272 int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
273 const AVPicture *pict);
275 int avcodec_close(AVCodecContext *avctx);
277 void avcodec_register_all(void);
279 #ifdef FF_POSTPROCESS
284 extern int quant_store[MBR+1][MBC+1]; // [Review]
287 #endif /* AVCODEC_H */