#ifndef MPEGVIDEO_H #define MPEGVIDEO_H 1 /* ** ** $VER: mpegvideo.h 1.10 (30.10.97) ** mpegvideo.datatype 1.10 ** ** header for the video decoder model ** ** Written 1996/1997 by Roland 'Gizzy' Mainz ** */ /* amiga includes */ #include /* MPEG Stream Constants */ /* Start codes. */ #define PICTURE_START_CODE (0x00000100) #define SLICE_MIN_START_CODE (0x00000101) #define SLICE_MAX_START_CODE (0x000001af) #define RESERVED_START_CODE_1 (0x000001b0) #define RESERVED_START_CODE_2 (0x000001b1) #define USER_START_CODE (0x000001b2) #define SEQ_START_CODE (0x000001b3) #define EXT_START_CODE (0x000001b5) #define RESERVED_START_CODE_3 (0x000001b6) #define SEQ_END_CODE (0x000001b7) #define GOP_START_CODE (0x000001b8) #define ISO_11172_END_CODE (0x000001b9) #define PACK_START_CODE (0x000001ba) #define SYSTEM_HEADER_START_CODE (0x000001bb) #define RESERVED_STREAM (0x000001bc) #define PRIVATE_STREAM_1 (0x000001bd) #define PADDING_STREAM (0x000001be) #define PRIVATE_STREAM_2 (0x000001bf) #define AUDIO_STREAM_0 (0x000001c0) #define AUDIO_STREAM_31 (0x000001df) #define VIDIO_STREAM_0 (0x000001e0) #define VIDIO_STREAM_15 (0x000001ef) #define RESERVED_DATA_STREAM_0 (0x000001f0) #define RESERVED_DATA_STREAM_15 (0x000001ff) /* Picture_coding_type */ #define I_TYPE (1) #define P_TYPE (2) #define B_TYPE (3) #define D_TYPE (4) /* Macros used with macroblock address decoding. */ #define MB_STUFFING (34) #define MB_ESCAPE (35) /* Special values for DCT Coefficients */ #define END_OF_BLOCK (62) #define ESCAPE (61) /* Define Parsing error codes. */ #define SKIP_PICTURE (-10) #define SKIP_TO_START_CODE (-1) #define PARSE_OK (1) /* Set ring buffer size. */ #define RING_BUF_SIZE (5) /* Number of macroblocks to process in one call to mpegVidRsrc. */ #define MB_QUANTUM (120) /* Lock flags for pict images. */ #define DISPLAY_LOCK (0x01) /* n/a */ #define PAST_LOCK (0x02) #define FUTURE_LOCK (0x04) /* dither modes for ditherType var */ #define HAM_DITHER (5) #define GRAY_DITHER (6) #define FULL_COLOR_DITHER (7) #define FULL_COLOR_DITHER16 (8) #if 0 #define FAST_COLOR_DITHER (10) #endif #define ORDERED_DITHER (9) /* Temporary definition of time stamp structure. */ typedef int TimeStamp; /* Structure with reconstructed pixel values. */ typedef struct pict_image { UBYTE *luminance; /* Luminance plane. */ UBYTE *Cr; /* Cr plane. */ UBYTE *Cb; /* Cb plane. */ UBYTE *display; /* Display plane. */ UWORD locked; /* Lock flag. (DISPLAY_LOCK, PAST_LOCK, FUTURE_LOCK) */ TimeStamp show_time; /* Presentation time. */ } PictImage; /* Group of pictures structure. */ typedef struct GoP { BOOL drop_flag; /* Flag indicating dropped frame. */ UBYTE tc_hours; /* Hour component of time code. (5 bits) */ UBYTE tc_minutes; /* Minute component of time code. (6 bits) */ UBYTE tc_seconds; /* Second component of time code. (6 bits) */ UBYTE tc_pictures; /* Picture counter of time code. (6 bits) */ BOOL closed_gop; /* Indicates no pred. vectors to previous group of pictures. */ BOOL broken_link; /* B frame unable to be decoded. */ UWORD Pad0; /* LW-align */ char *ext_data; /* Extension data. */ char *user_data; /* User data. */ } GoP; /* Picture structure. */ typedef struct pict { unsigned int temp_ref; /* Temporal reference. (10 bits) */ UBYTE code_type; /* Frame type: P, B, I, D (3 bits) */ UBYTE Pad0; UWORD vbv_delay; /* Buffer delay. (16 bits) */ BOOL full_pel_forw_vector; /* Forw. vectors specified in full pixel values flag. */ UWORD Pad1; ULONG forw_r_size; /* Used for vector decoding. */ LONG forw_f; /* Used for vector decoding. */ BOOL full_pel_back_vector; /* Back vectors specified in full pixel values flag. */ UWORD Pad2; ULONG back_r_size; /* Used in decoding. */ LONG back_f; /* Used in decoding. */ char *extra_info; /* Extra bit picture info. */ char *ext_data; /* Extension data. */ char *user_data; /* User data. */ } Pict; /* Slice structure. */ typedef struct slice { UBYTE vert_pos; /* Vertical position of slice. */ UBYTE quant_scale; /* Quantization scale. (5 bits) */ UWORD Pad0; char *extra_info; /* Extra bit slice info. */ } Slice; /* Macroblock structure. */ typedef struct macroblock { int mb_address; /* Macroblock address. */ int past_mb_addr; /* Previous mblock address. */ int motion_h_forw_code; /* Forw. horiz. motion vector code. */ unsigned int motion_h_forw_r; /* Used in decoding vectors. */ int motion_v_forw_code; /* Forw. vert. motion vector code. */ unsigned int motion_v_forw_r; /* Used in decdoinge vectors. */ int motion_h_back_code; /* Back horiz. motion vector code. */ unsigned int motion_h_back_r; /* Used in decoding vectors. */ int motion_v_back_code; /* Back vert. motion vector code. */ unsigned int motion_v_back_r; /* Used in decoding vectors. */ unsigned int cbp; /* Coded block pattern. */ BOOL mb_intra; /* Intracoded mblock flag. */ BOOL bpict_past_forw; /* Past B frame forw. vector flag. */ BOOL bpict_past_back; /* Past B frame back vector flag. */ UWORD Pad0; int past_intra_addr; /* Addr of last intracoded mblock. */ int recon_right_for_prev; /* Past right forw. vector. */ int recon_down_for_prev; /* Past down forw. vector. */ int recon_right_back_prev; /* Past right back vector. */ int recon_down_back_prev; /* Past down back vector. */ } Macroblock; /* Block structure. */ typedef struct block { WORD dct_recon[ 8 ][ 8 ]; /* Reconstructed dct coeff matrix. */ WORD dct_dc_y_past; /* Past lum. dc dct coefficient. */ WORD dct_dc_cr_past; /* Past cr dc dct coefficient. */ WORD dct_dc_cb_past; /* Past cb dc dct coefficient. */ } Block; /* Video stream structure. */ typedef struct vid_stream { UWORD h_size; /* Horiz. size in pixels. (12 bits) */ UWORD v_size; /* Vert. size in pixels. (12 bits) */ UWORD mb_height; /* Vert. size in mblocks. */ UWORD mb_width; /* Horiz. size in mblocks. */ UBYTE aspect_ratio; /* Code for aspect ratio. (4 bits) */ UBYTE picture_rate; /* Code for picture rate. (4 bits) */ UWORD Pad0; ULONG bit_rate; /* Bit rate. (18 bits) */ UWORD vbv_buffer_size; /* Minimum buffer size. (10 bits) */ BOOL const_param_flag; /* Contrained parameter flag. */ UBYTE intra_quant_matrix[ 8 ][ 8 ]; /* Quantization matrix for intracoded frames. */ UBYTE non_intra_quant_matrix[ 8 ][ 8 ]; /* Quanitization matrix for non intracoded frames. */ char *ext_data; /* Extension data. */ char *user_data; /* User data. */ GoP group; /* Current group of pict. */ Pict picture; /* Current picture. */ Slice slice; /* Current slice. */ Macroblock mblock; /* Current macroblock. */ Block block; /* Current block. */ int state; /* State of decoding. */ int bit_offset; /* Bit offset in stream. */ unsigned int *buffer; /* Pointer to next byte in buffer. */ int buf_length; /* Length of remaining buffer. */ unsigned int *buf_start; /* Pointer to buffer start. */ int max_buf_length; /* Max lenght of buffer. */ PictImage *past; /* Past predictive frame. */ PictImage *future; /* Future predictive frame. */ PictImage *current; /* Current frame. */ PictImage *ring[ RING_BUF_SIZE ]; /* Ring buffer of frames. */ } VidStream; /* Definition of Contant integer scale factor. */ #define CONST_BITS (13) /* Misc DCT definitions */ #define DCTSIZE (8) /* The basic DCT block is 8x8 samples */ #define DCTSIZE2 (64) /* DCTSIZE squared; # of elements in a block */ typedef WORD DCTELEM; typedef DCTELEM DCTBLOCK[ DCTSIZE2 ]; #endif /* !MPEGVIDEO_H */