--- trunk/xvidcore/src/quant/quant_mpeg4.c 2002/06/09 23:30:50 194 +++ trunk/xvidcore/src/quant/quant_mpeg4.c 2002/06/12 20:38:41 195 @@ -63,17 +63,16 @@ #define SCALEBITS 17 #define FIX(X) ((1UL << SCALEBITS) / (X) + 1) -static const uint32_t multipliers[32] = -{ - 0, FIX(2), FIX(4), FIX(6), - FIX(8), FIX(10), FIX(12), FIX(14), - FIX(16), FIX(18), FIX(20), FIX(22), - FIX(24), FIX(26), FIX(28), FIX(30), - FIX(32), FIX(34), FIX(36), FIX(38), - FIX(40), FIX(42), FIX(44), FIX(46), - FIX(48), FIX(50), FIX(52), FIX(54), - FIX(56), FIX(58), FIX(60), FIX(62) -}; +static const uint32_t multipliers[32] = { + 0, FIX(2), FIX(4), FIX(6), + FIX(8), FIX(10), FIX(12), FIX(14), + FIX(16), FIX(18), FIX(20), FIX(22), + FIX(24), FIX(26), FIX(28), FIX(30), + FIX(32), FIX(34), FIX(36), FIX(38), + FIX(40), FIX(42), FIX(44), FIX(46), + FIX(48), FIX(50), FIX(52), FIX(54), + FIX(56), FIX(58), FIX(60), FIX(62) +}; /* quantize intra-block @@ -83,38 +82,38 @@ // coeff[i] = (level + quantd) / quant2; */ -void quant4_intra_c(int16_t * coeff, const int16_t * data, const uint32_t quant, const uint32_t dcscalar) +void +quant4_intra_c(int16_t * coeff, + const int16_t * data, + const uint32_t quant, + const uint32_t dcscalar) { - const uint32_t quantd = ((VM18P*quant) + (VM18Q/2)) / VM18Q; - const uint32_t mult = multipliers[quant]; - uint32_t i; + const uint32_t quantd = ((VM18P * quant) + (VM18Q / 2)) / VM18Q; + const uint32_t mult = multipliers[quant]; + uint32_t i; int16_t *intra_matrix; intra_matrix = get_intra_matrix(); - coeff[0] = DIV_DIV(data[0], (int32_t)dcscalar); + coeff[0] = DIV_DIV(data[0], (int32_t) dcscalar); - for (i = 1; i < 64; i++) - { - if (data[i] < 0) - { - uint32_t level = -data[i]; - level = ((level<<4) + (intra_matrix[i]>>1)) / intra_matrix[i]; - level = ((level + quantd) * mult) >> 17; - coeff[i] = -(int16_t)level; - } - else if (data[i] > 0) - { - uint32_t level = data[i]; - level = ((level<<4) + (intra_matrix[i]>>1)) / intra_matrix[i]; - level = ((level + quantd) * mult) >> 17; - coeff[i] = level; - } - else - { - coeff[i] = 0; - } - } + for (i = 1; i < 64; i++) { + if (data[i] < 0) { + uint32_t level = -data[i]; + + level = ((level << 4) + (intra_matrix[i] >> 1)) / intra_matrix[i]; + level = ((level + quantd) * mult) >> 17; + coeff[i] = -(int16_t) level; + } else if (data[i] > 0) { + uint32_t level = data[i]; + + level = ((level << 4) + (intra_matrix[i] >> 1)) / intra_matrix[i]; + level = ((level + quantd) * mult) >> 17; + coeff[i] = level; + } else { + coeff[i] = 0; + } + } } @@ -123,42 +122,40 @@ // data[i] = (coeff[i] * default_intra_matrix[i] * quant2) >> 4; */ -void dequant4_intra_c(int16_t *data, const int16_t *coeff, const uint32_t quant, const uint32_t dcscalar) +void +dequant4_intra_c(int16_t * data, + const int16_t * coeff, + const uint32_t quant, + const uint32_t dcscalar) { - uint32_t i; + uint32_t i; int16_t *intra_matrix; intra_matrix = get_intra_matrix(); - - data[0] = coeff[0] * dcscalar; - if (data[0] < -2048) - { - data[0] = -2048; - } - else if (data[0] > 2047) - { - data[0] = 2047; - } - - for (i = 1; i < 64; i++) - { - if (coeff[i] == 0) - { - data[i] = 0; - } - else if (coeff[i] < 0) - { - uint32_t level = -coeff[i]; - level = (level * intra_matrix[i] * quant) >> 3; - data[i] = (level <= 2048 ? -(int16_t)level : -2048); - } - else // if (coeff[i] > 0) - { - uint32_t level = coeff[i]; - level = (level * intra_matrix[i] * quant) >> 3; - data[i] = (level <= 2047 ? level : 2047); - } - } + + data[0] = coeff[0] * dcscalar; + if (data[0] < -2048) { + data[0] = -2048; + } else if (data[0] > 2047) { + data[0] = 2047; + } + + for (i = 1; i < 64; i++) { + if (coeff[i] == 0) { + data[i] = 0; + } else if (coeff[i] < 0) { + uint32_t level = -coeff[i]; + + level = (level * intra_matrix[i] * quant) >> 3; + data[i] = (level <= 2048 ? -(int16_t) level : -2048); + } else // if (coeff[i] > 0) + { + uint32_t level = coeff[i]; + + level = (level * intra_matrix[i] * quant) >> 3; + data[i] = (level <= 2047 ? level : 2047); + } + } } @@ -170,39 +167,38 @@ // sum += abs(level); */ -uint32_t quant4_inter_c(int16_t * coeff, const int16_t * data, const uint32_t quant) +uint32_t +quant4_inter_c(int16_t * coeff, + const int16_t * data, + const uint32_t quant) { - const uint32_t mult = multipliers[quant]; - uint32_t sum = 0; - uint32_t i; + const uint32_t mult = multipliers[quant]; + uint32_t sum = 0; + uint32_t i; int16_t *inter_matrix; inter_matrix = get_inter_matrix(); - - for (i = 0; i < 64; i++) - { - if (data[i] < 0) - { - uint32_t level = -data[i]; - level = ((level<<4) + (inter_matrix[i]>>1)) / inter_matrix[i]; - level = (level * mult) >> 17; - sum += level; - coeff[i] = -(int16_t)level; - } - else if (data[i] > 0) - { - uint32_t level = data[i]; - level = ((level<<4) + (inter_matrix[i]>>1)) / inter_matrix[i]; - level = (level * mult) >> 17; - sum += level; - coeff[i] = level; - } - else - { - coeff[i] = 0; - } - } - return sum; + + for (i = 0; i < 64; i++) { + if (data[i] < 0) { + uint32_t level = -data[i]; + + level = ((level << 4) + (inter_matrix[i] >> 1)) / inter_matrix[i]; + level = (level * mult) >> 17; + sum += level; + coeff[i] = -(int16_t) level; + } else if (data[i] > 0) { + uint32_t level = data[i]; + + level = ((level << 4) + (inter_matrix[i] >> 1)) / inter_matrix[i]; + level = (level * mult) >> 17; + sum += level; + coeff[i] = level; + } else { + coeff[i] = 0; + } + } + return sum; } @@ -211,40 +207,39 @@ data = ((2 * coeff + SIGN(coeff)) * inter_matrix[i] * quant) / 16 */ -void dequant4_inter_c(int16_t *data, const int16_t *coeff, const uint32_t quant) +void +dequant4_inter_c(int16_t * data, + const int16_t * coeff, + const uint32_t quant) { - uint32_t sum = 0; - uint32_t i; + uint32_t sum = 0; + uint32_t i; int16_t *inter_matrix; inter_matrix = get_inter_matrix(); - - for (i = 0; i < 64; i++) - { - if (coeff[i] == 0) - { - data[i] = 0; - } - else if (coeff[i] < 0) - { - int32_t level = -coeff[i]; - level = ((2 * level + 1) * inter_matrix[i] * quant) >> 4; - data[i] = (level <= 2048 ? -level : -2048); - } - else // if (coeff[i] > 0) - { - uint32_t level = coeff[i]; - level = ((2 * level + 1) * inter_matrix[i] * quant) >> 4; - data[i] = (level <= 2047 ? level : 2047); - } - - sum ^= data[i]; - } - - // mismatch control - - if ((sum & 1) == 0) - { - data[63] ^= 1; - } + + for (i = 0; i < 64; i++) { + if (coeff[i] == 0) { + data[i] = 0; + } else if (coeff[i] < 0) { + int32_t level = -coeff[i]; + + level = ((2 * level + 1) * inter_matrix[i] * quant) >> 4; + data[i] = (level <= 2048 ? -level : -2048); + } else // if (coeff[i] > 0) + { + uint32_t level = coeff[i]; + + level = ((2 * level + 1) * inter_matrix[i] * quant) >> 4; + data[i] = (level <= 2047 ? level : 2047); + } + + sum ^= data[i]; + } + + // mismatch control + + if ((sum & 1) == 0) { + data[63] ^= 1; + } }