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FFmpeg/libavcodec/avcodec.h
Michael Niedermayer 098eefe183 statistics for 2-pass encoding 
Originally committed as revision 354 to svn://svn.ffmpeg.org/ffmpeg/trunk
2002-03-23 17:43:30 +00:00

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#ifndef AVCODEC_H
#define AVCODEC_H
#include "common.h"
enum CodecID {
CODEC_ID_NONE,
CODEC_ID_MPEG1VIDEO,
CODEC_ID_H263,
CODEC_ID_RV10,
CODEC_ID_MP2,
CODEC_ID_MP3LAME,
CODEC_ID_AC3,
CODEC_ID_MJPEG,
CODEC_ID_MPEG4,
CODEC_ID_RAWVIDEO,
CODEC_ID_MSMPEG4,
CODEC_ID_H263P,
CODEC_ID_H263I,
/* various pcm "codecs" */
CODEC_ID_PCM_S16LE,
CODEC_ID_PCM_S16BE,
CODEC_ID_PCM_U16LE,
CODEC_ID_PCM_U16BE,
CODEC_ID_PCM_S8,
CODEC_ID_PCM_U8,
CODEC_ID_PCM_MULAW,
CODEC_ID_PCM_ALAW,
};
enum CodecType {
CODEC_TYPE_VIDEO,
CODEC_TYPE_AUDIO,
};
enum PixelFormat {
PIX_FMT_YUV420P,
PIX_FMT_YUV422,
PIX_FMT_RGB24,
PIX_FMT_BGR24,
PIX_FMT_YUV422P,
PIX_FMT_YUV444P,
};
/* currently unused, may be used if 24/32 bits samples ever supported */
enum SampleFormat {
SAMPLE_FMT_S16 = 0, /* signed 16 bits */
};
/* 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
#define ME_EPZS 4
#define ME_X1 5
/* encoding support */
#define CODEC_FLAG_HQ 0x0001 /* high quality (non real time) encoding */
#define CODEC_FLAG_QSCALE 0x0002 /* use fixed qscale */
/* codec capabilities */
/* decoder can use draw_horiz_band callback */
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001
#define FRAME_RATE_BASE 10000
typedef struct AVCodecContext {
int bit_rate;
int bit_rate_tolerance; /* amount of +- bits (>0)*/
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 aspect_ratio_info;
#define FF_ASPECT_SQUARE 1
#define FF_ASPECT_4_3_625 2
#define FF_ASPECT_4_3_525 3
#define FF_ASPECT_16_9_625 4
#define FF_ASPECT_16_9_525 5
int gop_size; /* 0 = intra only */
int pix_fmt; /* pixel format, see PIX_FMT_xxx */
/* if non NULL, 'draw_horiz_band' is called by the libavcodec
decoder to draw an horizontal band. It improve cache usage. Not
all codecs can do that. You must check the codec capabilities
before */
void (*draw_horiz_band)(struct AVCodecContext *s,
UINT8 **src_ptr, int linesize,
int y, int width, int height);
/* audio only */
int sample_rate; /* samples per sec */
int channels;
int sample_fmt; /* sample format, currenly unused */
/* 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)) */
float qcompress; /* amount of qscale change between easy & hard scenes (0.0-1.0)*/
float qblur; /* amount of qscale smoothing over time (0.0-1.0) */
int qmin; /* min qscale */
int qmax; /* max qscale */
int max_qdiff; /* max qscale difference between frames */
struct AVCodec *codec;
void *priv_data;
/* The following data is for RTP friendly coding */
/* By now only H.263/H.263+ coder honours this */
int rtp_mode; /* 1 for activate RTP friendly-mode */
/* highers numbers represent more error-prone */
/* enviroments, by now just "1" exist */
int rtp_payload_size; /* The size of the RTP payload, the coder will */
/* do it's best to deliver a chunk with size */
/* below rtp_payload_size, the chunk will start */
/* with a start code on some codecs like H.263 */
/* This doesn't take account of any particular */
/* headers inside the transmited RTP payload */
/* The RTP callcack: This function is called */
/* every time the encoder as a packet to send */
/* Depends on the encoder if the data starts */
/* with a Start Code (it should) H.263 does */
void (*rtp_callback)(void *data, int size, int packet_number);
/* These are for PSNR calculation, if you set get_psnr to 1 */
/* after encoding you will have the PSNR on psnr_y/cb/cr */
int get_psnr;
float psnr_y;
float psnr_cb;
float psnr_cr;
/* statistics, used for 2-pass encoding */
int mv_bits;
int header_bits;
int i_tex_bits;
int p_tex_bits;
int i_count;
int p_count;
int skip_count;
int misc_bits; // cbp, mb_type
int frame_bits;
/* the following fields are ignored */
void *opaque; /* can be used to carry app specific stuff */
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);
int capabilities;
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 mp3lame_encoder;
extern AVCodec mpeg1video_encoder;
extern AVCodec h263_encoder;
extern AVCodec h263p_encoder;
extern AVCodec rv10_encoder;
extern AVCodec mjpeg_encoder;
extern AVCodec mpeg4_encoder;
extern AVCodec msmpeg4_encoder;
extern AVCodec h263_decoder;
extern AVCodec mpeg4_decoder;
extern AVCodec msmpeg4_decoder;
extern AVCodec mpeg_decoder;
extern AVCodec h263i_decoder;
extern AVCodec rv10_decoder;
extern AVCodec mjpeg_decoder;
extern AVCodec mp3_decoder;
/* pcm codecs */
#define PCM_CODEC(id, name) \
extern AVCodec name ## _decoder; \
extern AVCodec name ## _encoder;
PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
#undef PCM_CODEC
/* dummy raw video codec */
extern AVCodec rawvideo_codec;
/* the following codecs use external GPL libs */
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);
void avpicture_fill(AVPicture *picture, UINT8 *ptr,
int pix_fmt, int width, int height);
int avpicture_get_size(int pix_fmt, int width, int height);
/* convert among pixel formats */
int img_convert(AVPicture *dst, int dst_pix_fmt,
AVPicture *src, int pix_fmt,
int width, int height);
/* deinterlace a picture */
int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
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_encoder_by_name(const char *name);
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);
#ifdef FF_POSTPROCESS
#ifndef MBC
#define MBC 48
#define MBR 36
#endif
extern int quant_store[MBR+1][MBC+1]; // [Review]
#endif
#endif /* AVCODEC_H */
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