/* * mpeg2.h * Copyright (C) 2000-2003 Michel Lespinasse * Copyright (C) 1999-2000 Aaron Holtzman * * This file is part of mpeg2dec, a free MPEG-2 video stream decoder. * See http://libmpeg2.sourceforge.net/ for updates. * * mpeg2dec is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * mpeg2dec is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef MPEG2_H #define MPEG2_H #define MPEG2_VERSION(a,b,c) (((a)<<16)|((b)<<8)|(c)) #define MPEG2_RELEASE MPEG2_VERSION (0, 4, 0) /* 0.4.0 */ #define SEQ_FLAG_MPEG2 1 #define SEQ_FLAG_CONSTRAINED_PARAMETERS 2 #define SEQ_FLAG_PROGRESSIVE_SEQUENCE 4 #define SEQ_FLAG_LOW_DELAY 8 #define SEQ_FLAG_COLOUR_DESCRIPTION 16 #define SEQ_MASK_VIDEO_FORMAT 0xe0 #define SEQ_VIDEO_FORMAT_COMPONENT 0x00 #define SEQ_VIDEO_FORMAT_PAL 0x20 #define SEQ_VIDEO_FORMAT_NTSC 0x40 #define SEQ_VIDEO_FORMAT_SECAM 0x60 #define SEQ_VIDEO_FORMAT_MAC 0x80 #define SEQ_VIDEO_FORMAT_UNSPECIFIED 0xa0 typedef struct mpeg2_sequence_s { unsigned int width, height; unsigned int chroma_width, chroma_height; unsigned int byte_rate; unsigned int vbv_buffer_size; uint32_t flags; unsigned int picture_width, picture_height; unsigned int display_width, display_height; unsigned int pixel_width, pixel_height; unsigned int frame_period; uint8_t profile_level_id; uint8_t colour_primaries; uint8_t transfer_characteristics; uint8_t matrix_coefficients; } mpeg2_sequence_t; #define GOP_FLAG_DROP_FRAME 1 #define GOP_FLAG_BROKEN_LINK 2 #define GOP_FLAG_CLOSED_GOP 4 typedef struct mpeg2_gop_s { uint8_t hours; uint8_t minutes; uint8_t seconds; uint8_t pictures; uint32_t flags; } mpeg2_gop_t; #define PIC_MASK_CODING_TYPE 7 #define PIC_FLAG_CODING_TYPE_I 1 #define PIC_FLAG_CODING_TYPE_P 2 #define PIC_FLAG_CODING_TYPE_B 3 #define PIC_FLAG_CODING_TYPE_D 4 #define PIC_FLAG_TOP_FIELD_FIRST 8 #define PIC_FLAG_PROGRESSIVE_FRAME 16 #define PIC_FLAG_COMPOSITE_DISPLAY 32 #define PIC_FLAG_SKIP 64 #define PIC_FLAG_TAGS 128 #define PIC_MASK_COMPOSITE_DISPLAY 0xfffff000 typedef struct mpeg2_picture_s { unsigned int temporal_reference; unsigned int nb_fields; uint32_t tag, tag2; uint32_t flags; struct { int x, y; } display_offset[3]; } mpeg2_picture_t; typedef struct mpeg2_fbuf_s { uint8_t * buf[3]; void * id; } mpeg2_fbuf_t; typedef struct mpeg2_info_s { const mpeg2_sequence_t * sequence; const mpeg2_gop_t * gop; const mpeg2_picture_t * current_picture; const mpeg2_picture_t * current_picture_2nd; const mpeg2_fbuf_t * current_fbuf; const mpeg2_picture_t * display_picture; const mpeg2_picture_t * display_picture_2nd; const mpeg2_fbuf_t * display_fbuf; const mpeg2_fbuf_t * discard_fbuf; const uint8_t * user_data; unsigned int user_data_len; } mpeg2_info_t; typedef struct mpeg2dec_s mpeg2dec_t; typedef struct mpeg2_decoder_s mpeg2_decoder_t; typedef enum { STATE_BUFFER = 0, STATE_SEQUENCE = 1, STATE_SEQUENCE_REPEATED = 2, STATE_GOP = 3, STATE_PICTURE = 4, STATE_SLICE_1ST = 5, STATE_PICTURE_2ND = 6, STATE_SLICE = 7, STATE_END = 8, STATE_INVALID = 9, STATE_INVALID_END = 10 } mpeg2_state_t; typedef struct mpeg2_convert_init_s { unsigned int id_size; unsigned int buf_size[3]; void (* start)(void * id, const mpeg2_fbuf_t * fbuf, const mpeg2_picture_t * picture, const mpeg2_gop_t * gop); void (* copy)(void * id, uint8_t * const * src, unsigned int v_offset); } mpeg2_convert_init_t; typedef enum { MPEG2_CONVERT_SET = 0, MPEG2_CONVERT_STRIDE = 1, MPEG2_CONVERT_START = 2 } mpeg2_convert_stage_t; typedef int mpeg2_convert_t (int stage, void * id, const mpeg2_sequence_t * sequence, int stride, void * arg, mpeg2_convert_init_t * result); int mpeg2_convert (mpeg2dec_t * mpeg2dec, mpeg2_convert_t convert, void * arg); int mpeg2_stride (mpeg2dec_t * mpeg2dec, int stride); void mpeg2_set_buf (mpeg2dec_t * mpeg2dec, uint8_t * buf[3], void * id); void mpeg2_custom_fbuf (mpeg2dec_t * mpeg2dec, int custom_fbuf); mpeg2dec_t * mpeg2_init (void); const mpeg2_info_t * mpeg2_info (mpeg2dec_t * mpeg2dec); void mpeg2_close (mpeg2dec_t * mpeg2dec); void mpeg2_buffer (mpeg2dec_t * mpeg2dec, uint8_t * start, uint8_t * end); int mpeg2_getpos (mpeg2dec_t * mpeg2dec); mpeg2_state_t mpeg2_parse (mpeg2dec_t * mpeg2dec); void mpeg2_reset (mpeg2dec_t * mpeg2dec, int full_reset); void mpeg2_skip (mpeg2dec_t * mpeg2dec, int skip); void mpeg2_slice_region (mpeg2dec_t * mpeg2dec, int start, int end); void mpeg2_tag_picture (mpeg2dec_t * mpeg2dec, uint32_t tag, uint32_t tag2); void mpeg2_init_fbuf (mpeg2_decoder_t * decoder, uint8_t * current_fbuf[3], uint8_t * forward_fbuf[3], uint8_t * backward_fbuf[3]); void mpeg2_slice (mpeg2_decoder_t * decoder, int code, const uint8_t * buffer); typedef enum { MPEG2_ALLOC_MPEG2DEC = 0, MPEG2_ALLOC_CHUNK = 1, MPEG2_ALLOC_YUV = 2, MPEG2_ALLOC_CONVERT_ID = 3, MPEG2_ALLOC_CONVERTED = 4 } mpeg2_alloc_t; void * mpeg2_malloc (unsigned size, mpeg2_alloc_t reason); #if 0 void mpeg2_free (void * buf); #endif /* allocates a dedicated buffer and locks all previous allocation in place */ void * mpeg2_bufalloc(unsigned size, mpeg2_alloc_t reason); /* clears all non-dedicated buffer space */ void mpeg2_mem_reset(void); void mpeg2_alloc_init(unsigned char* buf, int mallocsize); #endif /* MPEG2_H */