223 lines
6.9 KiB
C
223 lines
6.9 KiB
C
/*
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* mpeg2.h
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* Copyright (C) 2000-2004 Michel Lespinasse <walken@zoy.org>
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* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
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*
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* This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
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* See http://libmpeg2.sourceforge.net/ for updates.
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*
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* mpeg2dec is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpeg2dec is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* $Id$
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* libmpeg2 sync history:
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* 2008-07-01 - CVS revision 1.67
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*/
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#ifndef MPEG2_H
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#define MPEG2_H
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#include "mpeg2dec_config.h"
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#define MPEG2_VERSION(a,b,c) (((a)<<16)|((b)<<8)|(c))
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#define MPEG2_RELEASE MPEG2_VERSION (0, 5, 0) /* 0.5.0 */
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#define SEQ_FLAG_MPEG2 1
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#define SEQ_FLAG_CONSTRAINED_PARAMETERS 2
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#define SEQ_FLAG_PROGRESSIVE_SEQUENCE 4
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#define SEQ_FLAG_LOW_DELAY 8
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#define SEQ_FLAG_COLOUR_DESCRIPTION 16
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#define SEQ_MASK_VIDEO_FORMAT 0xe0
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#define SEQ_VIDEO_FORMAT_COMPONENT 0x00
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#define SEQ_VIDEO_FORMAT_PAL 0x20
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#define SEQ_VIDEO_FORMAT_NTSC 0x40
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#define SEQ_VIDEO_FORMAT_SECAM 0x60
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#define SEQ_VIDEO_FORMAT_MAC 0x80
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#define SEQ_VIDEO_FORMAT_UNSPECIFIED 0xa0
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typedef struct mpeg2_sequence_s
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{
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unsigned int width, height;
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unsigned int chroma_width, chroma_height;
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unsigned int byte_rate;
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unsigned int vbv_buffer_size;
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uint32_t flags;
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unsigned int picture_width, picture_height;
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unsigned int display_width, display_height;
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unsigned int pixel_width, pixel_height;
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unsigned int frame_period;
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uint8_t profile_level_id;
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uint8_t colour_primaries;
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uint8_t transfer_characteristics;
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uint8_t matrix_coefficients;
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} mpeg2_sequence_t;
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#define GOP_FLAG_DROP_FRAME 1
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#define GOP_FLAG_BROKEN_LINK 2
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#define GOP_FLAG_CLOSED_GOP 4
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typedef struct mpeg2_gop_s
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{
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uint8_t hours;
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uint8_t minutes;
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uint8_t seconds;
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uint8_t pictures;
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uint32_t flags;
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} mpeg2_gop_t;
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#define PIC_MASK_CODING_TYPE 7
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#define PIC_FLAG_CODING_TYPE_I 1
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#define PIC_FLAG_CODING_TYPE_P 2
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#define PIC_FLAG_CODING_TYPE_B 3
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#define PIC_FLAG_CODING_TYPE_D 4
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#define PIC_FLAG_TOP_FIELD_FIRST 8
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#define PIC_FLAG_PROGRESSIVE_FRAME 16
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#define PIC_FLAG_COMPOSITE_DISPLAY 32
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#define PIC_FLAG_SKIP 64
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#define PIC_FLAG_TAGS 128
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#define PIC_MASK_COMPOSITE_DISPLAY 0xfffff000
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typedef struct mpeg2_picture_s
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{
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unsigned int temporal_reference;
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unsigned int nb_fields;
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uint32_t tag, tag2;
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uint32_t flags;
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struct
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{
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int x, y;
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} display_offset[3];
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} mpeg2_picture_t;
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typedef struct mpeg2_fbuf_s
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{
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uint8_t * buf[MPEG2_COMPONENTS];
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void * id;
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} mpeg2_fbuf_t;
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typedef struct mpeg2_info_s
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{
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const mpeg2_sequence_t * sequence;
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const mpeg2_gop_t * gop;
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const mpeg2_picture_t * current_picture;
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const mpeg2_picture_t * current_picture_2nd;
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const mpeg2_fbuf_t * current_fbuf;
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const mpeg2_picture_t * display_picture;
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const mpeg2_picture_t * display_picture_2nd;
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const mpeg2_fbuf_t * display_fbuf;
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const mpeg2_fbuf_t * discard_fbuf;
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const uint8_t * user_data;
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unsigned int user_data_len;
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} mpeg2_info_t;
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typedef struct mpeg2dec_s mpeg2dec_t;
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typedef struct mpeg2_decoder_s mpeg2_decoder_t;
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typedef enum
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{
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STATE_INTERNAL_NORETURN = -1,
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STATE_BUFFER = 0,
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STATE_SEQUENCE = 1,
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STATE_SEQUENCE_REPEATED = 2,
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STATE_SEQUENCE_MODIFIED = 3,
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STATE_GOP = 4,
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STATE_PICTURE = 5,
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STATE_SLICE_1ST = 6,
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STATE_PICTURE_2ND = 7,
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STATE_SLICE = 8,
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STATE_END = 9,
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STATE_INVALID = 10,
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STATE_INVALID_END = 11,
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} mpeg2_state_t;
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typedef struct mpeg2_convert_init_s
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{
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unsigned int id_size;
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unsigned int buf_size[MPEG2_COMPONENTS];
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void (* start)(void * id, const mpeg2_fbuf_t * fbuf,
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const mpeg2_picture_t * picture, const mpeg2_gop_t * gop);
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void (* copy)(void * id, uint8_t * const * src, unsigned int v_offset);
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} mpeg2_convert_init_t;
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typedef enum
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{
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MPEG2_CONVERT_SET = 0,
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MPEG2_CONVERT_STRIDE = 1,
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MPEG2_CONVERT_START = 2
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} mpeg2_convert_stage_t;
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typedef int mpeg2_convert_t (int stage, void * id,
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const mpeg2_sequence_t * sequence, int stride,
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void * arg, mpeg2_convert_init_t * result);
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int mpeg2_convert (mpeg2dec_t * mpeg2dec, mpeg2_convert_t convert, void * arg);
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int mpeg2_stride (mpeg2dec_t * mpeg2dec, int stride);
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void mpeg2_set_buf (mpeg2dec_t * mpeg2dec, uint8_t * buf[MPEG2_COMPONENTS],
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void * id);
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void mpeg2_custom_fbuf (mpeg2dec_t * mpeg2dec, int custom_fbuf);
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mpeg2dec_t * mpeg2_init (void);
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const mpeg2_info_t * mpeg2_info (mpeg2dec_t * mpeg2dec);
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void mpeg2_close (mpeg2dec_t * mpeg2dec);
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void mpeg2_buffer (mpeg2dec_t * mpeg2dec, uint8_t * start, uint8_t * end);
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int mpeg2_getpos (mpeg2dec_t * mpeg2dec);
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mpeg2_state_t mpeg2_parse (mpeg2dec_t * mpeg2dec);
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void mpeg2_reset (mpeg2dec_t * mpeg2dec, int full_reset);
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void mpeg2_skip (mpeg2dec_t * mpeg2dec, int skip);
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void mpeg2_slice_region (mpeg2dec_t * mpeg2dec, int start, int end);
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void mpeg2_tag_picture (mpeg2dec_t * mpeg2dec, uint32_t tag, uint32_t tag2);
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void mpeg2_init_fbuf (mpeg2_decoder_t * decoder,
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uint8_t * current_fbuf[MPEG2_COMPONENTS],
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uint8_t * forward_fbuf[MPEG2_COMPONENTS],
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uint8_t * backward_fbuf[MPEG2_COMPONENTS]);
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void mpeg2_slice (mpeg2_decoder_t * decoder, int code, const uint8_t * buffer);
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int mpeg2_guess_aspect (const mpeg2_sequence_t * sequence,
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unsigned int * pixel_width,
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unsigned int * pixel_height);
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typedef enum
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{
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MPEG2_ALLOC_MPEG2DEC = 0,
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MPEG2_ALLOC_CHUNK = 1,
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MPEG2_ALLOC_YUV = 2,
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MPEG2_ALLOC_CONVERT_ID = 3,
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MPEG2_ALLOC_CONVERTED = 4,
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MPEG_ALLOC_CODEC_MALLOC,
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MPEG_ALLOC_CODEC_CALLOC,
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MPEG_ALLOC_MPEG2_BUFFER,
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MPEG_ALLOC_AUDIOBUF,
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MPEG_ALLOC_PCMOUT,
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MPEG_ALLOC_DISKBUF,
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__MPEG_ALLOC_FIRST = -256,
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} mpeg2_alloc_t;
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void * mpeg2_malloc (unsigned size, mpeg2_alloc_t reason);
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#if 0
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void mpeg2_free (void * buf);
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#endif
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/* allocates a dedicated buffer and locks all previous allocation in place */
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void * mpeg2_bufalloc(unsigned size, mpeg2_alloc_t reason);
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/* clears all non-dedicated buffer space */
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void mpeg2_mem_reset(void);
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void mpeg2_alloc_init(unsigned char* buf, int mallocsize);
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#endif /* MPEG2_H */
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