apps/plugins/mpegplayer/mpeg2.h

   1 /*
   2  * mpeg2.h
   3  * Copyright (C) 2000-2004 Michel Lespinasse <walken@zoy.org>
   4  * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
   5  *
   6  * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
   7  * See http://libmpeg2.sourceforge.net/ for updates.
   8  *
   9  * mpeg2dec is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * mpeg2dec is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  * $Id$
  24  * libmpeg2 sync history:
  25  * 2008-07-01 - CVS revision 1.67
  26  */
  27
  28 #ifndef MPEG2_H
  29 #define MPEG2_H
  30
  31 #include "mpeg2dec_config.h"
  32
  33 #define MPEG2_VERSION(a,b,c) (((a)<<16)|((b)<<8)|(c))
  34 #define MPEG2_RELEASE MPEG2_VERSION (0, 5, 0)   /* 0.5.0 */
  35
  36 #define SEQ_FLAG_MPEG2                  1
  37 #define SEQ_FLAG_CONSTRAINED_PARAMETERS 2
  38 #define SEQ_FLAG_PROGRESSIVE_SEQUENCE   4
  39 #define SEQ_FLAG_LOW_DELAY              8
  40 #define SEQ_FLAG_COLOUR_DESCRIPTION    16
  41
  42 #define SEQ_MASK_VIDEO_FORMAT        0xe0
  43 #define SEQ_VIDEO_FORMAT_COMPONENT   0x00
  44 #define SEQ_VIDEO_FORMAT_PAL         0x20
  45 #define SEQ_VIDEO_FORMAT_NTSC        0x40
  46 #define SEQ_VIDEO_FORMAT_SECAM       0x60
  47 #define SEQ_VIDEO_FORMAT_MAC         0x80
  48 #define SEQ_VIDEO_FORMAT_UNSPECIFIED 0xa0
  49
  50 typedef struct mpeg2_sequence_s
  51 {
  52     unsigned int width, height;
  53     unsigned int chroma_width, chroma_height;
  54     unsigned int byte_rate;
  55     unsigned int vbv_buffer_size;
  56     uint32_t flags;
  57
  58     unsigned int picture_width, picture_height;
  59     unsigned int display_width, display_height;
  60     unsigned int pixel_width, pixel_height;
  61     unsigned int frame_period;
  62
  63     uint8_t profile_level_id;
  64     uint8_t colour_primaries;
  65     uint8_t transfer_characteristics;
  66     uint8_t matrix_coefficients;
  67 } mpeg2_sequence_t;
  68
  69 #define GOP_FLAG_DROP_FRAME  1
  70 #define GOP_FLAG_BROKEN_LINK 2
  71 #define GOP_FLAG_CLOSED_GOP  4
  72
  73 typedef struct mpeg2_gop_s
  74 {
  75     uint8_t hours;
  76     uint8_t minutes;
  77     uint8_t seconds;
  78     uint8_t pictures;
  79     uint32_t flags;
  80 } mpeg2_gop_t;
  81
  82 #define PIC_MASK_CODING_TYPE   7
  83 #define PIC_FLAG_CODING_TYPE_I 1
  84 #define PIC_FLAG_CODING_TYPE_P 2
  85 #define PIC_FLAG_CODING_TYPE_B 3
  86 #define PIC_FLAG_CODING_TYPE_D 4
  87
  88 #define PIC_FLAG_TOP_FIELD_FIRST    8
  89 #define PIC_FLAG_PROGRESSIVE_FRAME 16
  90 #define PIC_FLAG_COMPOSITE_DISPLAY 32
  91 #define PIC_FLAG_SKIP              64
  92 #define PIC_FLAG_TAGS             128
  93 #define PIC_MASK_COMPOSITE_DISPLAY 0xfffff000
  94
  95 typedef struct mpeg2_picture_s
  96 {
  97     unsigned int temporal_reference;
  98     unsigned int nb_fields;
  99     uint32_t tag, tag2;
 100     uint32_t flags;
 101     struct
 102     {
 103             int x, y;
 104     } display_offset[3];
 105 } mpeg2_picture_t;
 106
 107 typedef struct mpeg2_fbuf_s
 108 {
 109     uint8_t * buf[MPEG2_COMPONENTS];
 110     void * id;
 111 } mpeg2_fbuf_t;
 112
 113 typedef struct mpeg2_info_s
 114 {
 115     const mpeg2_sequence_t * sequence;
 116     const mpeg2_gop_t * gop;
 117     const mpeg2_picture_t * current_picture;
 118     const mpeg2_picture_t * current_picture_2nd;
 119     const mpeg2_fbuf_t * current_fbuf;
 120     const mpeg2_picture_t * display_picture;
 121     const mpeg2_picture_t * display_picture_2nd;
 122     const mpeg2_fbuf_t * display_fbuf;
 123     const mpeg2_fbuf_t * discard_fbuf;
 124     const uint8_t * user_data;
 125     unsigned int user_data_len;
 126 } mpeg2_info_t;
 127
 128 typedef struct mpeg2dec_s mpeg2dec_t;
 129 typedef struct mpeg2_decoder_s mpeg2_decoder_t;
 130
 131 typedef enum
 132 {
 133     STATE_INTERNAL_NORETURN = -1,
 134     STATE_BUFFER            = 0,
 135     STATE_SEQUENCE          = 1,
 136     STATE_SEQUENCE_REPEATED = 2,
 137     STATE_SEQUENCE_MODIFIED = 3,
 138     STATE_GOP               = 4,
 139     STATE_PICTURE           = 5,
 140     STATE_SLICE_1ST         = 6,
 141     STATE_PICTURE_2ND       = 7,
 142     STATE_SLICE             = 8,
 143     STATE_END               = 9,
 144     STATE_INVALID           = 10,
 145     STATE_INVALID_END       = 11,
 146 } mpeg2_state_t;
 147
 148 typedef struct mpeg2_convert_init_s
 149 {
 150     unsigned int id_size;
 151     unsigned int buf_size[MPEG2_COMPONENTS];
 152     void (* start)(void * id, const mpeg2_fbuf_t * fbuf,
 153                            const mpeg2_picture_t * picture, const mpeg2_gop_t * gop);
 154     void (* copy)(void * id, uint8_t * const * src, unsigned int v_offset);
 155 } mpeg2_convert_init_t;
 156
 157 typedef enum
 158 {
 159     MPEG2_CONVERT_SET    = 0,
 160     MPEG2_CONVERT_STRIDE = 1,
 161     MPEG2_CONVERT_START  = 2
 162 } mpeg2_convert_stage_t;
 163
 164 typedef int mpeg2_convert_t (int stage, void * id,
 165                              const mpeg2_sequence_t * sequence, int stride,
 166                              void * arg, mpeg2_convert_init_t * result);
 167 int mpeg2_convert (mpeg2dec_t * mpeg2dec, mpeg2_convert_t convert, void * arg);
 168 int mpeg2_stride (mpeg2dec_t * mpeg2dec, int stride);
 169 void mpeg2_set_buf (mpeg2dec_t * mpeg2dec, uint8_t * buf[MPEG2_COMPONENTS],
 170                     void * id);
 171 void mpeg2_custom_fbuf (mpeg2dec_t * mpeg2dec, int custom_fbuf);
 172
 173 mpeg2dec_t * mpeg2_init (void);
 174 const mpeg2_info_t * mpeg2_info (mpeg2dec_t * mpeg2dec);
 175 void mpeg2_close (mpeg2dec_t * mpeg2dec);
 176
 177 void mpeg2_buffer (mpeg2dec_t * mpeg2dec, uint8_t * start, uint8_t * end);
 178 int mpeg2_getpos (mpeg2dec_t * mpeg2dec);
 179 mpeg2_state_t mpeg2_parse (mpeg2dec_t * mpeg2dec);
 180
 181 void mpeg2_reset (mpeg2dec_t * mpeg2dec, int full_reset);
 182 void mpeg2_skip (mpeg2dec_t * mpeg2dec, int skip);
 183 void mpeg2_slice_region (mpeg2dec_t * mpeg2dec, int start, int end);
 184
 185 void mpeg2_tag_picture (mpeg2dec_t * mpeg2dec, uint32_t tag, uint32_t tag2);
 186
 187 void mpeg2_init_fbuf (mpeg2_decoder_t * decoder,
 188                       uint8_t * current_fbuf[MPEG2_COMPONENTS],
 189                       uint8_t * forward_fbuf[MPEG2_COMPONENTS],
 190                       uint8_t * backward_fbuf[MPEG2_COMPONENTS]);
 191 void mpeg2_slice (mpeg2_decoder_t * decoder, int code, const uint8_t * buffer);
 192
 193 int mpeg2_guess_aspect (const mpeg2_sequence_t * sequence,
 194                         unsigned int * pixel_width,
 195                         unsigned int * pixel_height);
 196
 197 typedef enum
 198 {
 199     MPEG2_ALLOC_MPEG2DEC   = 0,
 200     MPEG2_ALLOC_CHUNK      = 1,
 201     MPEG2_ALLOC_YUV        = 2,
 202     MPEG2_ALLOC_CONVERT_ID = 3,
 203     MPEG2_ALLOC_CONVERTED  = 4,
 204     MPEG_ALLOC_CODEC_MALLOC,
 205     MPEG_ALLOC_CODEC_CALLOC,
 206     MPEG_ALLOC_MPEG2_BUFFER,
 207     MPEG_ALLOC_AUDIOBUF,
 208     MPEG_ALLOC_PCMOUT,
 209     MPEG_ALLOC_DISKBUF,
 210     __MPEG_ALLOC_FIRST = -256,
 211 } mpeg2_alloc_t;
 212
 213 void * mpeg2_malloc (unsigned size, mpeg2_alloc_t reason);
 214 #if 0
 215 void mpeg2_free (void * buf);
 216 #endif
 217 /* allocates a dedicated buffer and locks all previous allocation in place */
 218 void * mpeg2_bufalloc(unsigned size, mpeg2_alloc_t reason);
 219 /* clears all non-dedicated buffer space */
 220 void mpeg2_mem_reset(void);
 221 void mpeg2_alloc_init(unsigned char* buf, int mallocsize);
 222
 223 #endif /* MPEG2_H */