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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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#define LIBAVCODEC_VERSION_INT 0x000406
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#define LIBAVCODEC_VERSION     "0.4.6"
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#define LIBAVCODEC_BUILD       4607
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#define LIBAVCODEC_BUILD_STR   "4607"
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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_MSMPEG4V1,
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    CODEC_ID_MSMPEG4V2,
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    CODEC_ID_MSMPEG4V3,
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    CODEC_ID_WMV1,
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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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#define CODEC_ID_MSMPEG4 CODEC_ID_MSMPEG4V3
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enum CodecType {
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    CODEC_TYPE_UNKNOWN = -1,
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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_ANY = -1,
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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, EPZS by default */
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enum Motion_Est_ID {
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    ME_ZERO = 1,
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    ME_FULL,
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    ME_LOG,
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    ME_PHODS,
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    ME_EPZS,
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    ME_X1
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};
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/* only for ME compatiblity with old apps */
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extern int motion_estimation_method;
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/* ME algos sorted by quality */
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static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG, 
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                                       ME_X1, ME_EPZS, ME_FULL };
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#define FF_MAX_B_FRAMES 4
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/* encoding support */
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/* note not everything is supported yet */
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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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#define CODEC_FLAG_4MV    0x0004 /* 4 MV per MB allowed */
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#define CODEC_FLAG_QPEL   0x0010 /* use qpel MC */
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#define CODEC_FLAG_GMC    0x0020 /* use GMC */
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#define CODEC_FLAG_TYPE   0x0040 /* fixed I/P frame type, from avctx->key_frame */
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/* parent program gurantees that the input for b-frame containing streams is not written to 
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   for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
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#define CODEC_FLAG_INPUT_PRESERVED 0x0100
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#define CODEC_FLAG_PASS1 0x0200  /* use internal 2pass ratecontrol in first  pass mode */
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#define CODEC_FLAG_PASS2 0x0400  /* use internal 2pass ratecontrol in second pass mode */
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#define CODEC_FLAG_EXTERN_HUFF 0x1000 /* use external huffman table (for mjpeg) */
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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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    int me_method; /* ME algorithm used for video coding */
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    /* extra data from parent application to codec, e.g. huffman table
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       for mjpeg */
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    /* the parent should allocate and free this buffer */
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    void *extradata;
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    int extradata_size;
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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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    enum PixelFormat pix_fmt;  /* pixel format, see PIX_FMT_xxx */
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    int repeat_pict; /* set this to 1 if you want the decoder
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                        to repeat frames for 3:2 pulldown (MPEG-2) */
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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 real_pict_num;  /* returns the real picture number of
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                           previous encoded frame */
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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 pict_type;      /* picture type of the previous 
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                           encoded frame */
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/* FIXME: these should have FF_ */
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#define I_TYPE 1 // Intra
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#define P_TYPE 2 // Predicted
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#define B_TYPE 3 // Bi-dir predicted
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#define S_TYPE 4 // S(GMC)-VOP MPEG4
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    int delay;          /* number of frames the decoded output 
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                           will be delayed relative to the encoded input */
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    uint8_t *mbskip_table; /* =1 if MB didnt change, is only valid for I/P frames 
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                              stride= mb_width = (width+15)>>4 */
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    /* encoding parameters */
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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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                         this is allso used to set the quality in vbr mode
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                         and the per frame quality in CODEC_FLAG_TYPE (second pass mode) */
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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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    int max_b_frames; /* maximum b frames, the output will be delayed by max_b_frames+1 relative to the input */
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    float b_quant_factor;/* qscale factor between ips and b frames */
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    int rc_strategy;
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    int b_frame_strategy;
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    int hurry_up;     /* when set to 1 during decoding, b frames will be skiped
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                         when set to 2 idct/dequant will be skipped too */
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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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    /* statistics, used for 2-pass encoding */
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    int mv_bits;
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    int header_bits;
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    int i_tex_bits;
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    int p_tex_bits;
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    int i_count;
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    int p_count;
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    int skip_count;
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    int misc_bits; // cbp, mb_type
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    int frame_bits;
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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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    enum CodecType codec_type; /* see CODEC_TYPE_xxx */
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    enum CodecID 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 msmpeg4v1_encoder;
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extern AVCodec msmpeg4v2_encoder;
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extern AVCodec msmpeg4v3_encoder;
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extern AVCodec h263_decoder;
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extern AVCodec mpeg4_decoder;
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extern AVCodec msmpeg4v1_decoder;
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extern AVCodec msmpeg4v2_decoder;
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extern AVCodec msmpeg4v3_decoder;
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extern AVCodec wmv1_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 mp2_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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/* returns LIBAVCODEC_VERSION_INT constant */
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unsigned avcodec_version( void );
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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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void avcodec_flush_buffers(AVCodecContext *avctx);
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#ifdef FF_POSTPROCESS
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#ifndef MBC
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#define MBC 128
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#define MBR 96
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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 */