diff options
Diffstat (limited to 'libvpx/vp9/encoder/vp9_quantize.c')
| -rw-r--r-- | libvpx/vp9/encoder/vp9_quantize.c | 78 |
1 files changed, 32 insertions, 46 deletions
diff --git a/libvpx/vp9/encoder/vp9_quantize.c b/libvpx/vp9/encoder/vp9_quantize.c index fca7525..d24be96 100644 --- a/libvpx/vp9/encoder/vp9_quantize.c +++ b/libvpx/vp9/encoder/vp9_quantize.c @@ -22,7 +22,7 @@ extern int enc_debug; #endif -void vp9_quantize_b_c(const int16_t *coeff_ptr, intptr_t n_coeffs, +void vp9_quantize_b_c(const int16_t *coeff_ptr, intptr_t count, int skip_block, const int16_t *zbin_ptr, const int16_t *round_ptr, const int16_t *quant_ptr, const int16_t *quant_shift_ptr, @@ -30,58 +30,44 @@ void vp9_quantize_b_c(const int16_t *coeff_ptr, intptr_t n_coeffs, const int16_t *dequant_ptr, int zbin_oq_value, uint16_t *eob_ptr, const int16_t *scan, const int16_t *iscan) { - int i, rc, eob; - int zbins[2], nzbins[2], zbin; - int x, y, z, sz; - int zero_flag = n_coeffs; + int i, non_zero_count = count, eob = -1; + const int zbins[2] = { zbin_ptr[0] + zbin_oq_value, + zbin_ptr[1] + zbin_oq_value }; + const int nzbins[2] = { zbins[0] * -1, + zbins[1] * -1 }; - vpx_memset(qcoeff_ptr, 0, n_coeffs*sizeof(int16_t)); - vpx_memset(dqcoeff_ptr, 0, n_coeffs*sizeof(int16_t)); - - eob = -1; - - // Base ZBIN - zbins[0] = zbin_ptr[0] + zbin_oq_value; - zbins[1] = zbin_ptr[1] + zbin_oq_value; - nzbins[0] = zbins[0] * -1; - nzbins[1] = zbins[1] * -1; + vpx_memset(qcoeff_ptr, 0, count * sizeof(int16_t)); + vpx_memset(dqcoeff_ptr, 0, count * sizeof(int16_t)); if (!skip_block) { // Pre-scan pass - for (i = n_coeffs - 1; i >= 0; i--) { - rc = scan[i]; - z = coeff_ptr[rc]; + for (i = count - 1; i >= 0; i--) { + const int rc = scan[i]; + const int coeff = coeff_ptr[rc]; - if (z < zbins[rc != 0] && z > nzbins[rc != 0]) { - zero_flag--; - } else { + if (coeff < zbins[rc != 0] && coeff > nzbins[rc != 0]) + non_zero_count--; + else break; - } } // Quantization pass: All coefficients with index >= zero_flag are // skippable. Note: zero_flag can be zero. - for (i = 0; i < zero_flag; i++) { - rc = scan[i]; - z = coeff_ptr[rc]; - - zbin = (zbins[rc != 0]); - - sz = (z >> 31); // sign of z - x = (z ^ sz) - sz; - - if (x >= zbin) { - x += (round_ptr[rc != 0]); - x = clamp(x, INT16_MIN, INT16_MAX); - y = (((int)(((int)(x * quant_ptr[rc != 0]) >> 16) + x)) * - quant_shift_ptr[rc != 0]) >> 16; // quantize (x) - x = (y ^ sz) - sz; // get the sign back - qcoeff_ptr[rc] = x; // write to destination - dqcoeff_ptr[rc] = x * dequant_ptr[rc != 0]; // dequantized value - - if (y) { - eob = i; // last nonzero coeffs - } + for (i = 0; i < non_zero_count; i++) { + const int rc = scan[i]; + const int coeff = coeff_ptr[rc]; + const int coeff_sign = (coeff >> 31); + const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign; + + if (abs_coeff >= zbins[rc != 0]) { + int tmp = clamp(abs_coeff + round_ptr[rc != 0], INT16_MIN, INT16_MAX); + tmp = ((((tmp * quant_ptr[rc != 0]) >> 16) + tmp) * + quant_shift_ptr[rc != 0]) >> 16; // quantization + qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign; + dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0]; + + if (tmp) + eob = i; } } } @@ -315,17 +301,17 @@ void vp9_mb_init_quantizer(VP9_COMP *cpi, MACROBLOCK *x) { SEG_LVL_SKIP); /* save this macroblock QIndex for vp9_update_zbin_extra() */ - x->e_mbd.q_index = qindex; + x->q_index = qindex; /* R/D setup */ cpi->mb.errorperbit = rdmult >> 6; cpi->mb.errorperbit += (cpi->mb.errorperbit == 0); - vp9_initialize_me_consts(cpi, xd->q_index); + vp9_initialize_me_consts(cpi, x->q_index); } void vp9_update_zbin_extra(VP9_COMP *cpi, MACROBLOCK *x) { - const int qindex = x->e_mbd.q_index; + const int qindex = x->q_index; const int y_zbin_extra = (cpi->common.y_dequant[qindex][1] * (cpi->zbin_mode_boost + x->act_zbin_adj)) >> 7; const int uv_zbin_extra = (cpi->common.uv_dequant[qindex][1] * |