common.h

关于DVD的MPEG2用的DSP代码,在DSP的实现MPEG的压缩,解压算法.

/* General Definitions */

#define         MPEG_AUDIO_ID           1
#define         MONO                    1
#define         STEREO                  2
#define         CRC16_POLYNOMIAL        0x8005
#define         SCALE_BLOCK             12
#define         SCALE_RANGE             64
#define         SBLIMIT                 32

#define         SIZE_ALLOC_0_1          44      // steps 2, bits 1, group 1,
#define         SIZE_ALLOC_2_3          24      // quant 1,

//#define         FRAME_SIZE_LIMIT        16129   // =1152*448/32+1
#define         FRAME_SIZE_LIMIT        4096*2  //debug
//#define         FRAME_SIZE_LIMIT        400*2  //debug

/* MPEG Header Definitions - Mode Values */

#define         SYNC_WORD_MPG           0x0fff
#define         MPG_MD_STEREO           0
#define         MPG_MD_JOINT_STEREO     1
#define         MPG_MD_DUAL_CHANNEL     2
#define         MPG_MD_MONO             3

/* Error Flags */

#define         F_SYNC_ERROR            1
#define         F_CRC_ERROR             2
//#define         F_LAYER_ERROR           3
#define         F_LAYER_ERROR           4
#define         F_INFO_ERROR            8