943718, 1189010, 1498059, 1887436 /* 48 - 51 */
};
+// should the intra and inter lambdas be different?
+// I'm just matching the behaviour of deadzone quant.
+static const int x264_trellis_lambda2_tab[2][52] = {
+ // inter lambda = .85 * .85 * 2**(qp/3. + 10 - LAMBDA_BITS)
+ { 46, 58, 73, 92, 117, 147,
+ 185, 233, 294, 370, 466, 587,
+ 740, 932, 1174, 1480, 1864, 2349,
+ 2959, 3728, 4697, 5918, 7457, 9395,
+ 11837, 14914, 18790, 23674, 29828, 37581,
+ 47349, 59656, 75163, 94699, 119313, 150326,
+ 189399, 238627, 300652, 378798, 477255, 601304,
+ 757596, 954511, 1202608, 1515192, 1909022, 2405217,
+ 3030384, 3818045, 4810435, 6060769 },
+ // intra lambda = .65 * .65 * 2**(qp/3. + 10 - LAMBDA_BITS)
+ { 27, 34, 43, 54, 68, 86,
+ 108, 136, 172, 216, 273, 343,
+ 433, 545, 687, 865, 1090, 1374,
+ 1731, 2180, 2747, 3461, 4361, 5494,
+ 6922, 8721, 10988, 13844, 17442, 21976,
+ 27688, 34885, 43953, 55377, 69771, 87906,
+ 110755, 139543, 175813, 221511, 279087, 351627,
+ 443023, 558174, 703255, 886046, 1116348, 1406511,
+ 1772093, 2232697, 2813022, 3544186 }
+};
+
+static const uint16_t x264_chroma_lambda2_offset_tab[] = {
+ 16, 20, 25, 32, 40, 50,
+ 64, 80, 101, 128, 161, 203,
+ 256, 322, 406, 512, 645, 812,
+ 1024, 1290, 1625, 2048, 2580, 3250,
+ 4096, 5160, 6501, 8192, 10321, 13003,
+ 16384, 20642, 26007, 32768, 41285, 52015,
+ 65535
+};
+
/* TODO: calculate CABAC costs */
static const int i_mb_b_cost_table[X264_MBTYPE_MAX] = {
9, 9, 9, 9, 0, 0, 0, 1, 3, 7, 7, 7, 3, 7, 7, 7, 5, 9, 0
static void x264_analyse_update_cache( x264_t *h, x264_mb_analysis_t *a );
-uint16_t *x264_cost_mv_fpel[52][4];
-uint16_t x264_cost_ref[52][3][33];
+/* Indexed by lambda instead of qp because, due to rounding,
+ * some quantizers share lambdas. This saves memory. */
+uint16_t *x264_cost_mv_fpel[92][4];
+uint16_t x264_cost_ref[92][3][33];
/* initialize an array of lambda*nbits for all possible mvs */
static void x264_mb_analyse_load_costs( x264_t *h, x264_mb_analysis_t *a )
{
- static int16_t *p_cost_mv[52];
+ static int16_t *p_cost_mv[92];
int i, j;
- if( !p_cost_mv[a->i_qp] )
+ if( !p_cost_mv[a->i_lambda] )
{
x264_emms();
/* could be faster, but isn't called many times */
/* factor of 4 from qpel, 2 from sign, and 2 because mv can be opposite from mvp */
- p_cost_mv[a->i_qp] = x264_malloc( (4*4*2048 + 1) * sizeof(int16_t) );
- p_cost_mv[a->i_qp] += 2*4*2048;
+ p_cost_mv[a->i_lambda] = x264_malloc( (4*4*2048 + 1) * sizeof(int16_t) );
+ p_cost_mv[a->i_lambda] += 2*4*2048;
for( i = 0; i <= 2*4*2048; i++ )
{
- p_cost_mv[a->i_qp][-i] =
- p_cost_mv[a->i_qp][i] = a->i_lambda * (log2f(i+1)*2 + 0.718f + !!i) + .5f;
+ p_cost_mv[a->i_lambda][-i] =
+ p_cost_mv[a->i_lambda][i] = a->i_lambda * (log2f(i+1)*2 + 0.718f + !!i) + .5f;
}
for( i = 0; i < 3; i++ )
for( j = 0; j < 33; j++ )
- x264_cost_ref[a->i_qp][i][j] = a->i_lambda * bs_size_te( i, j );
+ x264_cost_ref[a->i_lambda][i][j] = i ? a->i_lambda * bs_size_te( i, j ) : 0;
}
- a->p_cost_mv = p_cost_mv[a->i_qp];
- a->p_cost_ref0 = x264_cost_ref[a->i_qp][x264_clip3(h->sh.i_num_ref_idx_l0_active-1,0,2)];
- a->p_cost_ref1 = x264_cost_ref[a->i_qp][x264_clip3(h->sh.i_num_ref_idx_l1_active-1,0,2)];
+ a->p_cost_mv = p_cost_mv[a->i_lambda];
+ a->p_cost_ref0 = x264_cost_ref[a->i_lambda][x264_clip3(h->sh.i_num_ref_idx_l0_active-1,0,2)];
+ a->p_cost_ref1 = x264_cost_ref[a->i_lambda][x264_clip3(h->sh.i_num_ref_idx_l1_active-1,0,2)];
/* FIXME is this useful for all me methods? */
- if( h->param.analyse.i_me_method >= X264_ME_ESA && !x264_cost_mv_fpel[a->i_qp][0] )
+ if( h->param.analyse.i_me_method >= X264_ME_ESA && !x264_cost_mv_fpel[a->i_lambda][0] )
{
for( j=0; j<4; j++ )
{
- x264_cost_mv_fpel[a->i_qp][j] = x264_malloc( (4*2048 + 1) * sizeof(int16_t) );
- x264_cost_mv_fpel[a->i_qp][j] += 2*2048;
+ x264_cost_mv_fpel[a->i_lambda][j] = x264_malloc( (4*2048 + 1) * sizeof(int16_t) );
+ x264_cost_mv_fpel[a->i_lambda][j] += 2*2048;
for( i = -2*2048; i < 2*2048; i++ )
- x264_cost_mv_fpel[a->i_qp][j][i] = p_cost_mv[a->i_qp][i*4+j];
+ x264_cost_mv_fpel[a->i_lambda][j][i] = p_cost_mv[a->i_lambda][i*4+j];
}
}
}
static void x264_mb_analyse_init( x264_t *h, x264_mb_analysis_t *a, int i_qp )
{
int i = h->param.analyse.i_subpel_refine - (h->sh.i_type == SLICE_TYPE_B);
+
/* mbrd == 1 -> RD mode decision */
/* mbrd == 2 -> RD refinement */
- a->i_mbrd = (i>=6) + (i>=8);
+ /* mbrd == 3 -> QPRD */
+ a->i_mbrd = (i>=6) + (i>=8) + (h->param.analyse.i_subpel_refine>=10);
+
/* conduct the analysis using this lamda and QP */
a->i_qp = h->mb.i_qp = i_qp;
h->mb.i_chroma_qp = h->chroma_qp_table[i_qp];
+
a->i_lambda = x264_lambda_tab[i_qp];
a->i_lambda2 = x264_lambda2_tab[i_qp];
+
+ h->mb.b_trellis = h->param.analyse.i_trellis > 1 && a->i_mbrd;
+ if( h->param.analyse.i_trellis )
+ {
+ h->mb.i_trellis_lambda2[0][0] = x264_trellis_lambda2_tab[0][h->mb.i_qp];
+ h->mb.i_trellis_lambda2[0][1] = x264_trellis_lambda2_tab[1][h->mb.i_qp];
+ h->mb.i_trellis_lambda2[1][0] = x264_trellis_lambda2_tab[0][h->mb.i_chroma_qp];
+ h->mb.i_trellis_lambda2[1][1] = x264_trellis_lambda2_tab[1][h->mb.i_chroma_qp];
+ }
+ h->mb.i_psy_rd_lambda = a->i_lambda;
+ /* Adjusting chroma lambda based on QP offset hurts PSNR, so we'll leave it as part of psy-RD. */
+ h->mb.i_chroma_lambda2_offset = h->mb.i_psy_rd ? x264_chroma_lambda2_offset_tab[h->mb.i_qp-h->mb.i_chroma_qp+12] : 256;
+
h->mb.i_me_method = h->param.analyse.i_me_method;
h->mb.i_subpel_refine = h->param.analyse.i_subpel_refine;
h->mb.b_chroma_me = h->param.analyse.b_chroma_me && h->sh.i_type == SLICE_TYPE_P
&& h->mb.i_subpel_refine >= 5;
- h->mb.b_trellis = h->param.analyse.i_trellis > 1 && a->i_mbrd;
+
h->mb.b_transform_8x8 = 0;
h->mb.b_noise_reduction = 0;
int i_fmv_range = 4 * h->param.analyse.i_mv_range;
// limit motion search to a slightly smaller range than the theoretical limit,
// since the search may go a few iterations past its given range
- int i_fpel_border = 5; // umh unconditional radius
- int i_spel_border = 8; // 1.5 for subpel_satd, 1.5 for subpel_rd, 2 for bime, round up
+ int i_fpel_border = 6; // umh: 1 for diamond, 2 for octagon, 2 for hpel
/* Calculate max allowed MV range */
#define CLIP_FMV(mv) x264_clip3( mv, -i_fmv_range, i_fmv_range-1 )
h->mb.mv_min[1] = 4*( -16*mb_y - 24 );
h->mb.mv_max[1] = 4*( 16*( mb_height - mb_y - 1 ) + 24 );
- h->mb.mv_min_spel[1] = x264_clip3( h->mb.mv_min[1], X264_MAX(4*(-512+i_spel_border), -i_fmv_range), i_fmv_range );
+ h->mb.mv_min_spel[1] = x264_clip3( h->mb.mv_min[1], -i_fmv_range, i_fmv_range );
h->mb.mv_max_spel[1] = CLIP_FMV( h->mb.mv_max[1] );
h->mb.mv_max_spel[1] = X264_MIN( h->mb.mv_max_spel[1], thread_mvy_range*4 );
h->mb.mv_min_fpel[1] = (h->mb.mv_min_spel[1]>>2) + i_fpel_border;
int i_satd_thresh = a->i_mbrd ? COST_MAX : X264_MIN( i_satd_inter, a->i_satd_i16x16 );
int i_cost = 0;
h->mb.i_cbp_luma = 0;
- b_merged_satd = h->pixf.intra_sa8d_x3_8x8 && h->pixf.mbcmp[0] == h->pixf.satd[0];
+ b_merged_satd = h->pixf.intra_mbcmp_x3_8x8 && !h->mb.b_lossless;
// FIXME some bias like in i4x4?
if( h->sh.i_type == SLICE_TYPE_B )
if( b_merged_satd && i_max == 9 )
{
int satd[9];
- h->pixf.intra_sa8d_x3_8x8( p_src_by, edge, satd );
+ h->pixf.intra_mbcmp_x3_8x8( p_src_by, edge, satd );
satd[i_pred_mode] -= 3 * a->i_lambda;
for( i=2; i>=0; i-- )
{
int i_cost;
int i_satd_thresh = X264_MIN3( i_satd_inter, a->i_satd_i16x16, a->i_satd_i8x8 );
h->mb.i_cbp_luma = 0;
- b_merged_satd = h->pixf.intra_satd_x3_4x4 && h->pixf.mbcmp[0] == h->pixf.satd[0];
+ b_merged_satd = h->pixf.intra_mbcmp_x3_4x4 && !h->mb.b_lossless;
if( a->i_mbrd )
i_satd_thresh = i_satd_thresh * (10-a->b_fast_intra)/8;
if( b_merged_satd && i_max >= 6 )
{
int satd[9];
- h->pixf.intra_satd_x3_4x4( p_src_by, p_dst_by, satd );
+ h->pixf.intra_mbcmp_x3_4x4( p_src_by, p_dst_by, satd );
satd[i_pred_mode] -= 3 * a->i_lambda;
for( i=2; i>=0; i-- )
COPY2_IF_LT( i_best, satd[i] + 4 * a->i_lambda,
static void x264_intra_rd_refine( x264_t *h, x264_mb_analysis_t *a )
{
- uint8_t *p_src = h->mb.pic.p_fenc[0];
uint8_t *p_dst = h->mb.pic.p_fdec[0];
int i, j, idx, x, y;
int i_max, i_mode, i_thresh;
uint64_t i_satd, i_best;
- int i_pred_mode;
int predict_mode[9];
h->mb.i_skip_intra = 0;
uint8_t *p_dst_by = p_dst + block_idx_xy_fdec[idx];
i_best = COST_MAX64;
- i_pred_mode = x264_mb_predict_intra4x4_mode( h, idx );
-
predict_4x4_mode_available( h->mb.i_neighbour4[idx], predict_mode, &i_max );
if( (h->mb.i_neighbour4[idx] & (MB_TOPRIGHT|MB_TOP)) == MB_TOP )
uint64_t pels_h = 0;
uint8_t pels_v[7];
uint16_t i_nnz[2];
- uint8_t *p_src_by;
uint8_t *p_dst_by;
int j;
int cbp_luma_new = 0;
i_thresh = a->i_satd_i8x8_dir[a->i_predict8x8[idx]][idx] * 11/8;
i_best = COST_MAX64;
- i_pred_mode = x264_mb_predict_intra4x4_mode( h, 4*idx );
x = idx&1;
y = idx>>1;
- p_src_by = p_src + 8*x + 8*y*FENC_STRIDE;
p_dst_by = p_dst + 8*x + 8*y*FDEC_STRIDE;
predict_4x4_mode_available( h->mb.i_neighbour8[idx], predict_mode, &i_max );
- x264_predict_8x8_filter( p_dst_by, edge, h->mb.i_neighbour8[idx], ALL_NEIGHBORS );
+ h->predict_8x8_filter( p_dst_by, edge, h->mb.i_neighbour8[idx], ALL_NEIGHBORS );
for( i = 0; i < i_max; i++ )
{
{
int i_rd8;
x264_analyse_update_cache( h, a );
- h->mb.b_transform_8x8 = !h->mb.b_transform_8x8;
+ h->mb.b_transform_8x8 ^= 1;
/* FIXME only luma is needed, but the score for comparison already includes chroma */
i_rd8 = x264_rd_cost_mb( h, a->i_lambda2 );
*i_rd = i_rd8;
}
else
- h->mb.b_transform_8x8 = !h->mb.b_transform_8x8;
+ h->mb.b_transform_8x8 ^= 1;
}
}
+/* Rate-distortion optimal QP selection.
+ * FIXME: More than half of the benefit of this function seems to be
+ * in the way it improves the coding of chroma DC (by decimating or
+ * finding a better way to code a single DC coefficient.)
+ * There must be a more efficient way to get that portion of the benefit
+ * without doing full QP-RD, but RD-decimation doesn't seem to do the
+ * trick. */
+static inline void x264_mb_analyse_qp_rd( x264_t *h, x264_mb_analysis_t *a )
+{
+ int bcost, cost, direction, failures, prevcost, origcost;
+ int orig_qp = h->mb.i_qp, bqp = h->mb.i_qp;
+ origcost = bcost = x264_rd_cost_mb( h, a->i_lambda2 );
+
+ /* If CBP is already zero, don't raise the quantizer any higher. */
+ for( direction = h->mb.cbp[h->mb.i_mb_xy] ? 1 : -1; direction >= -1; direction-=2 )
+ {
+ h->mb.i_qp = orig_qp;
+ failures = 0;
+ prevcost = origcost;
+ while( h->mb.i_qp > 0 && h->mb.i_qp < 51 )
+ {
+ h->mb.i_qp += direction;
+ h->mb.i_chroma_qp = h->chroma_qp_table[h->mb.i_qp];
+ cost = x264_rd_cost_mb( h, a->i_lambda2 );
+ COPY2_IF_LT( bcost, cost, bqp, h->mb.i_qp );
+
+ /* We can't assume that the costs are monotonic over QPs.
+ * Tie case-as-failure seems to give better results. */
+ if( cost < prevcost )
+ failures = 0;
+ else
+ failures++;
+ prevcost = cost;
+
+ /* Without psy-RD, require monotonicity when lowering
+ * quant, allow 1 failure when raising quant.
+ * With psy-RD, allow 1 failure when lowering quant,
+ * allow 2 failures when raising quant.
+ * Psy-RD generally seems to result in more chaotic
+ * RD score-vs-quantizer curves. */
+ if( failures > ((direction + 1)>>1)+(!!h->mb.i_psy_rd) )
+ break;
+ if( direction == 1 && !h->mb.cbp[h->mb.i_mb_xy] )
+ break;
+ }
+ }
+
+ h->mb.i_qp = bqp;
+ h->mb.i_chroma_qp = h->chroma_qp_table[h->mb.i_qp];
+
+ /* Check transform again; decision from before may no longer be optimal. */
+ if( h->mb.i_qp != orig_qp && x264_mb_transform_8x8_allowed( h ) &&
+ h->param.analyse.b_transform_8x8 )
+ {
+ h->mb.b_transform_8x8 ^= 1;
+ cost = x264_rd_cost_mb( h, a->i_lambda2 );
+ if( cost > bcost )
+ h->mb.b_transform_8x8 ^= 1;
+ }
+}
/*****************************************************************************
* x264_macroblock_analyse:
h->mb.i_qp = x264_ratecontrol_qp( h );
if( h->param.rc.i_aq_mode )
+ {
x264_adaptive_quant( h );
+ /* If the QP of this MB is within 1 of the previous MB, code the same QP as the previous MB,
+ * to lower the bit cost of the qp_delta. Don't do this if QPRD is enabled. */
+ if( h->param.analyse.i_subpel_refine < 10 && abs(h->mb.i_qp - h->mb.i_last_qp) == 1 )
+ h->mb.i_qp = h->mb.i_last_qp;
+ }
x264_mb_analyse_init( h, &analysis, h->mb.i_qp );
if( !analysis.i_mbrd )
x264_mb_analyse_transform( h );
+ if( analysis.i_mbrd == 3 && !IS_SKIP(h->mb.i_type) )
+ x264_mb_analyse_qp_rd( h, &analysis );
+
h->mb.b_trellis = h->param.analyse.i_trellis;
h->mb.b_noise_reduction = !!h->param.analyse.i_noise_reduction;
if( !IS_SKIP(h->mb.i_type) && h->mb.i_psy_trellis && h->param.analyse.i_trellis == 1 )
projects / x264 / blobdiff