mpegvideo.h

mediastreamer2是开源的网络传输媒体流的库

    int msmpeg4_version;   ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
    int per_mb_rl_table;
    int esc3_level_length;
    int esc3_run_length;
    /** [mb_intra][isChroma][level][run][last] */
    int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
    int inter_intra_pred;
    int mspel;

    /* decompression specific */
    GetBitContext gb;

    /* Mpeg1 specific */
    int gop_picture_number;  ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
    int last_mv_dir;         ///< last mv_dir, used for b frame encoding
    int broken_link;         ///< no_output_of_prior_pics_flag
    uint8_t *vbv_delay_ptr;  ///< pointer to vbv_delay in the bitstream

    /* MPEG2 specific - I wish I had not to support this mess. */
    int progressive_sequence;
    int mpeg_f_code[2][2];
    int picture_structure;
/* picture type */
#define PICT_TOP_FIELD     1
#define PICT_BOTTOM_FIELD  2
#define PICT_FRAME         3

    int intra_dc_precision;
    int frame_pred_frame_dct;
    int top_field_first;
    int concealment_motion_vectors;
    int q_scale_type;
    int intra_vlc_format;
    int alternate_scan;
    int repeat_first_field;
    int chroma_420_type;
    int chroma_format;
#define CHROMA_420 1
#define CHROMA_422 2
#define CHROMA_444 3
    int chroma_x_shift;//depend on pix_format, that depend on chroma_format
    int chroma_y_shift;

    int progressive_frame;
    int full_pel[2];
    int interlaced_dct;
    int first_slice;
    int first_field;         ///< is 1 for the first field of a field picture 0 otherwise

    /* RTP specific */
    int rtp_mode;

    uint8_t *ptr_lastgob;
    int swap_uv;//vcr2 codec is mpeg2 varint with UV swaped
    short * pblocks[12];

    DCTELEM (*block)[64]; ///< points to one of the following blocks
    DCTELEM (*blocks)[8][64]; // for HQ mode we need to keep the best block
    int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
#define SLICE_OK         0
#define SLICE_ERROR     -1
#define SLICE_END       -2 ///<end marker found
#define SLICE_NOEND     -3 ///<no end marker or error found but mb count exceeded

    void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
                           DCTELEM *block/*align 16*/, int n, int qscale);
    void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
                           DCTELEM *block/*align 16*/, int n, int qscale);
    void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
                           DCTELEM *block/*align 16*/, int n, int qscale);
    void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
                           DCTELEM *block/*align 16*/, int n, int qscale);
    void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
                           DCTELEM *block/*align 16*/, int n, int qscale);
    void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
                           DCTELEM *block/*align 16*/, int n, int qscale);
    void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
                           DCTELEM *block/*align 16*/, int n, int qscale);
    void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
                           DCTELEM *block/*align 16*/, int n, int qscale);
    void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
                           DCTELEM *block/*align 16*/, int n, int qscale);
    void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
                           DCTELEM *block/*align 16*/, int n, int qscale);
    int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
    int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
    void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
} MpegEncContext;


void MPV_decode_defaults(MpegEncContext *s);
int MPV_common_init(MpegEncContext *s);
void MPV_common_end(MpegEncContext *s);
void MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]);
int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
void MPV_frame_end(MpegEncContext *s);
int MPV_encode_init(AVCodecContext *avctx);
int MPV_encode_end(AVCodecContext *avctx);
int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
void MPV_common_init_mmx(MpegEncContext *s);
void MPV_common_init_axp(MpegEncContext *s);
void MPV_common_init_mlib(MpegEncContext *s);
void MPV_common_init_mmi(MpegEncContext *s);
void MPV_common_init_armv4l(MpegEncContext *s);
void MPV_common_init_altivec(MpegEncContext *s);
extern void (*draw_edges)(uint8_t *buf, int wrap, int width, int height, int w);
void ff_clean_intra_table_entries(MpegEncContext *s);
void ff_init_scantable(uint8_t *, ScanTable *st, const uint8_t *src_scantable);
void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
void ff_emulated_edge_mc(uint8_t *buf, uint8_t *src, int linesize, int block_w, int block_h,
                                    int src_x, int src_y, int w, int h);
void ff_mpeg_flush(AVCodecContext *avctx);
void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
int ff_find_unused_picture(MpegEncContext *s, int shared);
void ff_denoise_dct(MpegEncContext *s, DCTELEM *block);
void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
const uint8_t *ff_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);

void ff_er_frame_start(MpegEncContext *s);
void ff_er_frame_end(MpegEncContext *s);
void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);

int ff_dct_common_init(MpegEncContext *s);
void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
                       const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);

void ff_init_block_index(MpegEncContext *s);

static inline void ff_update_block_index(MpegEncContext *s){
    const int block_size= 8>>s->avctx->lowres;

    s->block_index[0]+=2;
    s->block_index[1]+=2;
    s->block_index[2]+=2;
    s->block_index[3]+=2;
    s->block_index[4]++;
    s->block_index[5]++;
    s->dest[0]+= 2*block_size;
    s->dest[1]+= block_size;
    s->dest[2]+= block_size;
}

static inline int get_bits_diff(MpegEncContext *s){
    const int bits= put_bits_count(&s->pb);
    const int last= s->last_bits;

    s->last_bits = bits;

    return bits - last;
}

static inline int ff_h263_round_chroma(int x){
    static const uint8_t h263_chroma_roundtab[16] = {
    //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
        0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
    };
    return h263_chroma_roundtab[x & 0xf] + (x >> 3);
}

/* motion_est.c */
void ff_estimate_p_frame_motion(MpegEncContext * s,
                             int mb_x, int mb_y);
void ff_estimate_b_frame_motion(MpegEncContext * s,
                             int mb_x, int mb_y);
int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
void ff_fix_long_p_mvs(MpegEncContext * s);
void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
                     int16_t (*mv_table)[2], int f_code, int type, int truncate);
void ff_init_me(MpegEncContext *s);
int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
                             int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
                             int ref_mv_scale, int size, int h);
int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
                               int ref_index, int size, int h, int add_rate);

/* mpeg12.c */
extern const uint16_t ff_mpeg1_default_intra_matrix[64];
extern const uint16_t ff_mpeg1_default_non_intra_matrix[64];
extern const uint8_t ff_mpeg1_dc_scale_table[128];
extern const AVRational ff_frame_rate_tab[];

void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
void mpeg1_encode_mb(MpegEncContext *s,
                     DCTELEM block[6][64],
                     int motion_x, int motion_y);
void ff_mpeg1_encode_init(MpegEncContext *s);
void ff_mpeg1_encode_slice_header(MpegEncContext *s);
void ff_mpeg1_clean_buffers(MpegEncContext *s);
int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);

#include "rl.h"

extern const uint8_t ff_mpeg4_y_dc_scale_table[32];
extern const uint8_t ff_mpeg4_c_dc_scale_table[32];
extern const uint8_t ff_aic_dc_scale_table[32];
extern const int16_t ff_mpeg4_default_intra_matrix[64];
extern const int16_t ff_mpeg4_default_non_intra_matrix[64];
extern const uint8_t ff_h263_chroma_qscale_table[32];
extern const uint8_t ff_h263_loop_filter_strength[32];

/* h261.c */
void ff_h261_loop_filter(MpegEncContext *s);
void ff_h261_reorder_mb_index(MpegEncContext* s);
void ff_h261_encode_mb(MpegEncContext *s,
                    DCTELEM block[6][64],
                    int motion_x, int motion_y);
void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
void ff_h261_encode_init(MpegEncContext *s);
int ff_h261_get_picture_format(int width, int height);


/* h263.c, h263dec.c */
int ff_h263_decode_init(AVCodecContext *avctx);
int ff_h263_decode_frame(AVCodecContext *avctx,
                             void *data, int *data_size,
                             const uint8_t *buf, int buf_size);
int ff_h263_decode_end(AVCodecContext *avctx);
void h263_encode_mb(MpegEncContext *s,
                    DCTELEM block[6][64],
                    int motion_x, int motion_y);
void mpeg4_encode_mb(MpegEncContext *s,
                    DCTELEM block[6][64],
                    int motion_x, int motion_y);
void h263_encode_picture_header(MpegEncContext *s, int picture_number);
void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number);
void h263_encode_gob_header(MpegEncContext * s, int mb_line);
int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir,
                        int *px, int *py);
void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
                   int dir);
void ff_set_mpeg4_time(MpegEncContext * s);
void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
void h263_encode_init(MpegEncContext *s);
void h263_decode_init_vlc(MpegEncContext *s);
int h263_decode_picture_header(MpegEncContext *s);
int ff_h263_decode_gob_header(MpegEncContext *s);
int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
void ff_h263_update_motion_val(MpegEncContext * s);
void ff_h263_loop_filter(MpegEncContext * s);
void ff_set_qscale(MpegEncContext * s, int qscale);
int ff_h263_decode_mba(MpegEncContext *s);
void ff_h263_encode_mba(MpegEncContext *s);

int intel_h263_decode_picture_header(MpegEncContext *s);
int flv_h263_decode_picture_header(MpegEncContext *s);
int ff_h263_decode_mb(MpegEncContext *s,
                      DCTELEM block[6][64]);
int ff_mpeg4_decode_mb(MpegEncContext *s,
                      DCTELEM block[6][64]);
int h263_get_picture_format(int width, int height);
void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
void ff_mpeg4_clean_buffers(MpegEncContext *s);
void ff_mpeg4_stuffing(PutBitContext * pbc);
void ff_mpeg4_init_partitions(MpegEncContext *s);
void ff_mpeg4_merge_partitions(MpegEncContext *s);
void ff_clean_mpeg4_qscales(MpegEncContext *s);
void ff_clean_h263_qscales(MpegEncContext *s);
int ff_mpeg4_decode_partitions(MpegEncContext *s);
int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
int ff_h263_resync(MpegEncContext *s);
int ff_h263_get_gob_height(MpegEncContext *s);
void ff_mpeg4_init_direct_mv(MpegEncContext *s);
int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);


/* rv10.c */
void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
int rv_decode_dc(MpegEncContext *s, int n);
void rv20_encode_picture_header(MpegEncContext *s, int picture_number);


/* msmpeg4.c */
void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
void msmpeg4_encode_ext_header(MpegEncContext * s);
void msmpeg4_encode_mb(MpegEncContext * s,
                       DCTELEM block[6][64],
                       int motion_x, int motion_y);
int msmpeg4_decode_picture_header(MpegEncContext * s);
int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
int ff_msmpeg4_decode_init(MpegEncContext *s);
void ff_msmpeg4_encode_init(MpegEncContext *s);
int ff_wmv2_decode_picture_header(MpegEncContext * s);
int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
void ff_mspel_motion(MpegEncContext *s,
                               uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
                               uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
                               int motion_x, int motion_y, int h);
int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
void ff_wmv2_encode_mb(MpegEncContext * s,
                       DCTELEM block[6][64],
                       int motion_x, int motion_y);

#endif /* FFMPEG_MPEGVIDEO_H */