quant_mpeg.h

经典的MP4编解码核心库

#ifndef _QUANT_MPEG_H_
#define _QUANT_MPEG_H_

#include "../global.h"
#include "common.h"

int16_t intra_matrix[64] = {
     8,17,18,19,21,23,25,27,
    17,18,19,21,23,25,27,28,
    20,21,22,23,24,26,28,30,
    21,22,23,24,26,28,30,32,
    22,23,24,26,28,30,32,35,
    23,24,26,28,30,32,35,38,
    25,26,28,30,32,35,38,41,
    27,28,30,32,35,38,41,45
};

int16_t intra_matrix2[64] = {
     8/2,17/2,18/2,19/2,21/2,23/2,25/2,27/2,
    17/2,18/2,19/2,21/2,23/2,25/2,27/2,28/2,
    20/2,21/2,22/2,23/2,24/2,26/2,28/2,30/2,
    21/2,22/2,23/2,24/2,26/2,28/2,30/2,32/2,
    22/2,23/2,24/2,26/2,28/2,30/2,32/2,35/2,
    23/2,24/2,26/2,28/2,30/2,32/2,35/2,38/2,
    25/2,26/2,28/2,30/2,32/2,35/2,38/2,41/2,
    27/2,28/2,30/2,32/2,35/2,38/2,41/2,45/2
};

int16_t intra_matrix_fix[64] = {
     FIX(8),FIX(17),FIX(18),FIX(19),FIX(21),FIX(23),FIX(25),FIX(27),
    FIX(17),FIX(18),FIX(19),FIX(21),FIX(23),FIX(25),FIX(27),FIX(28),
    FIX(20),FIX(21),FIX(22),FIX(23),FIX(24),FIX(26),FIX(28),FIX(30),
    FIX(21),FIX(22),FIX(23),FIX(24),FIX(26),FIX(28),FIX(30),FIX(32),
    FIX(22),FIX(23),FIX(24),FIX(26),FIX(28),FIX(30),FIX(32),FIX(35),
    FIX(23),FIX(24),FIX(26),FIX(28),FIX(30),FIX(32),FIX(35),FIX(38),
    FIX(25),FIX(26),FIX(28),FIX(30),FIX(32),FIX(35),FIX(38),FIX(41),
    FIX(27),FIX(28),FIX(30),FIX(32),FIX(35),FIX(38),FIX(41),FIX(45)
};

int16_t inter_matrix[64] = {
    16,17,18,19,20,21,22,23,
    17,18,19,20,21,22,23,24,
    18,19,20,21,22,23,24,25,
    19,20,21,22,23,24,26,27,
    20,21,22,23,25,26,27,28,
    21,22,23,24,26,27,28,30,
    22,23,24,26,27,28,30,31,
    23,24,25,27,28,30,31,33
};

int16_t inter_matrix2[64] = {
    16/2,17/2,18/2,19/2,20/2,21/2,22/2,23/2,
    17/2,18/2,19/2,20/2,21/2,22/2,23/2,24/2,
    18/2,19/2,20/2,21/2,22/2,23/2,24/2,25/2,
    19/2,20/2,21/2,22/2,23/2,24/2,26/2,27/2,
    20/2,21/2,22/2,23/2,25/2,26/2,27/2,28/2,
    21/2,22/2,23/2,24/2,26/2,27/2,28/2,30/2,
    22/2,23/2,24/2,26/2,27/2,28/2,30/2,31/2,
    23/2,24/2,25/2,27/2,28/2,30/2,31/2,33/2
};

int16_t inter_matrix_fix[64] = {
    FIX(16),FIX(17),FIX(18),FIX(19),FIX(20),FIX(21),FIX(22),FIX(23),
    FIX(17),FIX(18),FIX(19),FIX(20),FIX(21),FIX(22),FIX(23),FIX(24),
    FIX(18),FIX(19),FIX(20),FIX(21),FIX(22),FIX(23),FIX(24),FIX(25),
    FIX(19),FIX(20),FIX(21),FIX(22),FIX(23),FIX(24),FIX(26),FIX(27),
    FIX(20),FIX(21),FIX(22),FIX(23),FIX(25),FIX(26),FIX(27),FIX(28),
    FIX(21),FIX(22),FIX(23),FIX(24),FIX(26),FIX(27),FIX(28),FIX(30),
    FIX(22),FIX(23),FIX(24),FIX(26),FIX(27),FIX(28),FIX(30),FIX(31),
    FIX(23),FIX(24),FIX(25),FIX(27),FIX(28),FIX(30),FIX(31),FIX(33)
};


static const int16_t default_intra_matrix[64] = {
     8,17,18,19,21,23,25,27,
    17,18,19,21,23,25,27,28,
    20,21,22,23,24,26,28,30,
    21,22,23,24,26,28,30,32,
    22,23,24,26,28,30,32,35,
    23,24,26,28,30,32,35,38,
    25,26,28,30,32,35,38,41,
    27,28,30,32,35,38,41,45
};

static const int16_t default_inter_matrix[64] = {
    16,17,18,19,20,21,22,23,
    17,18,19,20,21,22,23,24,
    18,19,20,21,22,23,24,25,
    19,20,21,22,23,24,26,27,
    20,21,22,23,25,26,27,28,
    21,22,23,24,26,27,28,30,
    22,23,24,26,27,28,30,31,
    23,24,25,27,28,30,31,33
};



void quant_mpeg_intra_init(int16_t *intra_m, int use_default)
{
	if (use_default)
	{
		memcpy(intra_m, default_intra_matrix, 64 * sizeof (int16_t));
	}
}


void quant_mpeg_inter_init(int16_t *inter_m, int use_default)
{
	if (use_default)
	{
		memcpy(inter_m, default_inter_matrix, 64 * sizeof (int16_t));
	}
}



#endif /* _QUANT_MPEG_H_ */