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ffmpeg / libavcodec / avcodec.h @ 2efe097a

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#ifndef AVCODEC_H
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#define AVCODEC_H
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#include "common.h"
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enum CodecID {
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    CODEC_ID_NONE, 
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    CODEC_ID_MPEG1VIDEO,
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    CODEC_ID_H263,
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    CODEC_ID_RV10,
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    CODEC_ID_MP2,
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    CODEC_ID_MP3LAME,
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    CODEC_ID_AC3,
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    CODEC_ID_MJPEG,
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    CODEC_ID_MPEG4,
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    CODEC_ID_RAWVIDEO,
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    CODEC_ID_MSMPEG4,
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    CODEC_ID_H263P,
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    CODEC_ID_H263I,
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    /* various pcm "codecs" */
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    CODEC_ID_PCM_S16LE,
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    CODEC_ID_PCM_S16BE,
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    CODEC_ID_PCM_U16LE,
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    CODEC_ID_PCM_U16BE,
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    CODEC_ID_PCM_S8,
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    CODEC_ID_PCM_U8,
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    CODEC_ID_PCM_MULAW,
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    CODEC_ID_PCM_ALAW,
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};
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enum CodecType {
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    CODEC_TYPE_VIDEO,
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    CODEC_TYPE_AUDIO,
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};
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enum PixelFormat {
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    PIX_FMT_YUV420P,
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    PIX_FMT_YUV422,
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    PIX_FMT_RGB24,
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    PIX_FMT_BGR24,
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    PIX_FMT_YUV422P,
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    PIX_FMT_YUV444P,
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};
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/* currently unused, may be used if 24/32 bits samples ever supported */
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enum SampleFormat {
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    SAMPLE_FMT_S16 = 0,         /* signed 16 bits */
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};
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/* in bytes */
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#define AVCODEC_MAX_AUDIO_FRAME_SIZE 18432
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/* motion estimation type */
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extern int motion_estimation_method;
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#define ME_ZERO   0
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#define ME_FULL   1
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#define ME_LOG    2
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#define ME_PHODS  3
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#define ME_EPZS   4
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#define ME_X1     5
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/* encoding support */
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#define CODEC_FLAG_HQ     0x0001 /* high quality (non real time) encoding */
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#define CODEC_FLAG_QSCALE 0x0002 /* use fixed qscale */
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/* codec capabilities */
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/* decoder can use draw_horiz_band callback */
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#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001
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#define FRAME_RATE_BASE 10000
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typedef struct AVCodecContext {
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    int bit_rate;
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    int bit_rate_tolerance; /* amount of +- bits (>0)*/
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    int flags;
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    int sub_id;    /* some codecs needs additionnal format info. It is
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                      stored there */
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    /* video only */
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    int frame_rate; /* frames per sec multiplied by FRAME_RATE_BASE */
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    int width, height;
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    int aspect_ratio_info;
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#define FF_ASPECT_SQUARE 1
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#define FF_ASPECT_4_3_625 2
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#define FF_ASPECT_4_3_525 3
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#define FF_ASPECT_16_9_625 4
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#define FF_ASPECT_16_9_525 5
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    int gop_size; /* 0 = intra only */
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    int pix_fmt;  /* pixel format, see PIX_FMT_xxx */
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    /* if non NULL, 'draw_horiz_band' is called by the libavcodec
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       decoder to draw an horizontal band. It improve cache usage. Not
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       all codecs can do that. You must check the codec capabilities
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       before */
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    void (*draw_horiz_band)(struct AVCodecContext *s,
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                            UINT8 **src_ptr, int linesize,
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                            int y, int width, int height);
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    /* audio only */
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    int sample_rate; /* samples per sec */
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    int channels;
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    int sample_fmt;  /* sample format, currenly unused */
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    /* the following data should not be initialized */
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    int frame_size; /* in samples, initialized when calling 'init' */
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    int frame_number; /* audio or video frame number */
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    int key_frame;    /* true if the previous compressed frame was 
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                         a key frame (intra, or seekable) */
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    int quality;      /* quality of the previous encoded frame 
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                         (between 1 (good) and 31 (bad)) */
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    float qcompress;  /* amount of qscale change between easy & hard scenes (0.0-1.0)*/
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    float qblur;      /* amount of qscale smoothing over time (0.0-1.0) */
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    int qmin;         /* min qscale */
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    int qmax;         /* max qscale */
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    int max_qdiff;    /* max qscale difference between frames */
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    struct AVCodec *codec;
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    void *priv_data;
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    /* The following data is for RTP friendly coding */
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    /* By now only H.263/H.263+ coder honours this   */
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    int rtp_mode;   /* 1 for activate RTP friendly-mode           */
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                    /* highers numbers represent more error-prone */
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                    /* enviroments, by now just "1" exist         */
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    int rtp_payload_size;   /* The size of the RTP payload, the coder will  */
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                            /* do it's best to deliver a chunk with size    */
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                            /* below rtp_payload_size, the chunk will start */
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                            /* with a start code on some codecs like H.263  */
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                            /* This doesn't take account of any particular  */
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                            /* headers inside the transmited RTP payload    */
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    /* The RTP callcack: This function is called  */
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    /* every time the encoder as a packet to send */
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    /* Depends on the encoder if the data starts  */
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    /* with a Start Code (it should) H.263 does   */
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    void (*rtp_callback)(void *data, int size, int packet_number); 
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    /* These are for PSNR calculation, if you set get_psnr to 1 */
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    /* after encoding you will have the PSNR on psnr_y/cb/cr    */
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    int get_psnr;
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    float psnr_y;
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    float psnr_cb;
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    float psnr_cr;
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    /* the following fields are ignored */
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    void *opaque;   /* can be used to carry app specific stuff */
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    char codec_name[32];
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    int codec_type; /* see CODEC_TYPE_xxx */
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    int codec_id; /* see CODEC_ID_xxx */
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    unsigned int codec_tag;  /* codec tag, only used if unknown codec */
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} AVCodecContext;
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typedef struct AVCodec {
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    char *name;
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    int type;
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    int id;
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    int priv_data_size;
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    int (*init)(AVCodecContext *);
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    int (*encode)(AVCodecContext *, UINT8 *buf, int buf_size, void *data);
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    int (*close)(AVCodecContext *);
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    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, 
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                  UINT8 *buf, int buf_size);
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    int capabilities;
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    struct AVCodec *next;
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} AVCodec;
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/* three components are given, that's all */
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typedef struct AVPicture {
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    UINT8 *data[3];
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    int linesize[3];
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} AVPicture;
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extern AVCodec ac3_encoder;
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extern AVCodec mp2_encoder;
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extern AVCodec mp3lame_encoder;
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extern AVCodec mpeg1video_encoder;
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extern AVCodec h263_encoder;
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extern AVCodec h263p_encoder;
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extern AVCodec rv10_encoder;
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extern AVCodec mjpeg_encoder;
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extern AVCodec mpeg4_encoder;
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extern AVCodec msmpeg4_encoder;
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extern AVCodec h263_decoder;
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extern AVCodec mpeg4_decoder;
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extern AVCodec msmpeg4_decoder;
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extern AVCodec mpeg_decoder;
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extern AVCodec h263i_decoder;
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extern AVCodec rv10_decoder;
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extern AVCodec mjpeg_decoder;
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extern AVCodec mp3_decoder;
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/* pcm codecs */
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#define PCM_CODEC(id, name) \
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extern AVCodec name ## _decoder; \
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extern AVCodec name ## _encoder;
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PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
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PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
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PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
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PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
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PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
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PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
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PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
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PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
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#undef PCM_CODEC
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/* dummy raw video codec */
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extern AVCodec rawvideo_codec;
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/* the following codecs use external GPL libs */
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extern AVCodec ac3_decoder;
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/* resample.c */
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struct ReSampleContext;
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typedef struct ReSampleContext ReSampleContext;
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ReSampleContext *audio_resample_init(int output_channels, int input_channels, 
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                                     int output_rate, int input_rate);
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int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
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void audio_resample_close(ReSampleContext *s);
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/* YUV420 format is assumed ! */
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struct ImgReSampleContext;
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typedef struct ImgReSampleContext ImgReSampleContext;
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ImgReSampleContext *img_resample_init(int output_width, int output_height,
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                                      int input_width, int input_height);
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void img_resample(ImgReSampleContext *s, 
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                  AVPicture *output, AVPicture *input);
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void img_resample_close(ImgReSampleContext *s);
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void avpicture_fill(AVPicture *picture, UINT8 *ptr,
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                    int pix_fmt, int width, int height);
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int avpicture_get_size(int pix_fmt, int width, int height);
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/* convert among pixel formats */
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int img_convert(AVPicture *dst, int dst_pix_fmt,
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                AVPicture *src, int pix_fmt, 
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                int width, int height);
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/* deinterlace a picture */
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int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
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                          int pix_fmt, int width, int height);
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/* external high level API */
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extern AVCodec *first_avcodec;
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void avcodec_init(void);
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void register_avcodec(AVCodec *format);
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AVCodec *avcodec_find_encoder(enum CodecID id);
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AVCodec *avcodec_find_encoder_by_name(const char *name);
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AVCodec *avcodec_find_decoder(enum CodecID id);
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AVCodec *avcodec_find_decoder_by_name(const char *name);
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void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
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int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
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int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples, 
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                         int *frame_size_ptr,
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                         UINT8 *buf, int buf_size);
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int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture, 
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                         int *got_picture_ptr,
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                         UINT8 *buf, int buf_size);
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int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size, 
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                         const short *samples);
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int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size, 
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                         const AVPicture *pict);
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int avcodec_close(AVCodecContext *avctx);
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void avcodec_register_all(void);
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#ifdef FF_POSTPROCESS
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#ifndef MBC
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#define MBC 48
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#define MBR 36
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#endif
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extern int quant_store[MBR+1][MBC+1]; // [Review]
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#endif
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#endif /* AVCODEC_H */