},
};
+static const uint8_t scan_1x1[1] = {
+ 0,
+};
+
+static const uint8_t horiz_scan2x2_x[4] = {
+ 0, 1, 0, 1,
+};
+
+static const uint8_t horiz_scan2x2_y[4] = {
+ 0, 0, 1, 1
+};
+
+static const uint8_t horiz_scan4x4_x[16] = {
+ 0, 1, 2, 3,
+ 0, 1, 2, 3,
+ 0, 1, 2, 3,
+ 0, 1, 2, 3,
+};
+
+static const uint8_t horiz_scan4x4_y[16] = {
+ 0, 0, 0, 0,
+ 1, 1, 1, 1,
+ 2, 2, 2, 2,
+ 3, 3, 3, 3,
+};
+
+static const uint8_t horiz_scan8x8_inv[8][8] = {
+ { 0, 1, 2, 3, 16, 17, 18, 19, },
+ { 4, 5, 6, 7, 20, 21, 22, 23, },
+ { 8, 9, 10, 11, 24, 25, 26, 27, },
+ { 12, 13, 14, 15, 28, 29, 30, 31, },
+ { 32, 33, 34, 35, 48, 49, 50, 51, },
+ { 36, 37, 38, 39, 52, 53, 54, 55, },
+ { 40, 41, 42, 43, 56, 57, 58, 59, },
+ { 44, 45, 46, 47, 60, 61, 62, 63, },
+};
+
+static const uint8_t diag_scan4x1_x[4] = {
+ 0, 1, 2, 3,
+};
+
+static const uint8_t diag_scan1x4_y[4] = {
+ 0, 1, 2, 3,
+};
+
+static const uint8_t diag_scan2x2_x[4] = {
+ 0, 0, 1, 1,
+};
+
+static const uint8_t diag_scan2x2_y[4] = {
+ 0, 1, 0, 1,
+};
+
+static const uint8_t diag_scan2x2_inv[2][2] = {
+ { 0, 2, },
+ { 1, 3, },
+};
+
+static const uint8_t diag_scan8x2_x[16] = {
+ 0, 0, 1, 1,
+ 2, 2, 3, 3,
+ 4, 4, 5, 5,
+ 6, 6, 7, 7,
+};
+
+static const uint8_t diag_scan8x2_y[16] = {
+ 0, 1, 0, 1,
+ 0, 1, 0, 1,
+ 0, 1, 0, 1,
+ 0, 1, 0, 1,
+};
+
+static const uint8_t diag_scan8x2_inv[2][8] = {
+ { 0, 2, 4, 6, 8, 10, 12, 14, },
+ { 1, 3, 5, 7, 9, 11, 13, 15, },
+};
+
+static const uint8_t diag_scan2x8_x[16] = {
+ 0, 0, 1, 0,
+ 1, 0, 1, 0,
+ 1, 0, 1, 0,
+ 1, 0, 1, 1,
+};
+
+static const uint8_t diag_scan2x8_y[16] = {
+ 0, 1, 0, 2,
+ 1, 3, 2, 4,
+ 3, 5, 4, 6,
+ 5, 7, 6, 7,
+};
+
+static const uint8_t diag_scan2x8_inv[8][2] = {
+ { 0, 2, },
+ { 1, 4, },
+ { 3, 6, },
+ { 5, 8, },
+ { 7, 10, },
+ { 9, 12, },
+ { 11, 14, },
+ { 13, 15, },
+};
+
+const uint8_t ff_hevc_diag_scan4x4_x[16] = {
+ 0, 0, 1, 0,
+ 1, 2, 0, 1,
+ 2, 3, 1, 2,
+ 3, 2, 3, 3,
+};
+
+const uint8_t ff_hevc_diag_scan4x4_y[16] = {
+ 0, 1, 0, 2,
+ 1, 0, 3, 2,
+ 1, 0, 3, 2,
+ 1, 3, 2, 3,
+};
+
+static const uint8_t diag_scan4x4_inv[4][4] = {
+ { 0, 2, 5, 9, },
+ { 1, 4, 8, 12, },
+ { 3, 7, 11, 14, },
+ { 6, 10, 13, 15, },
+};
+
+const uint8_t ff_hevc_diag_scan8x8_x[64] = {
+ 0, 0, 1, 0,
+ 1, 2, 0, 1,
+ 2, 3, 0, 1,
+ 2, 3, 4, 0,
+ 1, 2, 3, 4,
+ 5, 0, 1, 2,
+ 3, 4, 5, 6,
+ 0, 1, 2, 3,
+ 4, 5, 6, 7,
+ 1, 2, 3, 4,
+ 5, 6, 7, 2,
+ 3, 4, 5, 6,
+ 7, 3, 4, 5,
+ 6, 7, 4, 5,
+ 6, 7, 5, 6,
+ 7, 6, 7, 7,
+};
+
+const uint8_t ff_hevc_diag_scan8x8_y[64] = {
+ 0, 1, 0, 2,
+ 1, 0, 3, 2,
+ 1, 0, 4, 3,
+ 2, 1, 0, 5,
+ 4, 3, 2, 1,
+ 0, 6, 5, 4,
+ 3, 2, 1, 0,
+ 7, 6, 5, 4,
+ 3, 2, 1, 0,
+ 7, 6, 5, 4,
+ 3, 2, 1, 7,
+ 6, 5, 4, 3,
+ 2, 7, 6, 5,
+ 4, 3, 7, 6,
+ 5, 4, 7, 6,
+ 5, 7, 6, 7,
+};
+
+static const uint8_t diag_scan8x8_inv[8][8] = {
+ { 0, 2, 5, 9, 14, 20, 27, 35, },
+ { 1, 4, 8, 13, 19, 26, 34, 42, },
+ { 3, 7, 12, 18, 25, 33, 41, 48, },
+ { 6, 11, 17, 24, 32, 40, 47, 53, },
+ { 10, 16, 23, 31, 39, 46, 52, 57, },
+ { 15, 22, 30, 38, 45, 51, 56, 60, },
+ { 21, 29, 37, 44, 50, 55, 59, 62, },
+ { 28, 36, 43, 49, 54, 58, 61, 63, },
+};
+
void ff_hevc_save_states(HEVCContext *s, int ctb_addr_ts)
{
if (s->pps->entropy_coding_sync_enabled_flag &&
i++; \
return i;
-int ff_hevc_last_significant_coeff_x_prefix_decode(HEVCContext *s, int c_idx,
+static av_always_inline int last_significant_coeff_x_prefix_decode(HEVCContext *s, int c_idx,
int log2_size)
{
LAST_SIG_COEFF(LAST_SIGNIFICANT_COEFF_X_PREFIX)
}
-int ff_hevc_last_significant_coeff_y_prefix_decode(HEVCContext *s, int c_idx,
+static av_always_inline int last_significant_coeff_y_prefix_decode(HEVCContext *s, int c_idx,
int log2_size)
{
LAST_SIG_COEFF(LAST_SIGNIFICANT_COEFF_Y_PREFIX)
}
-int ff_hevc_last_significant_coeff_suffix_decode(HEVCContext *s,
+static av_always_inline int last_significant_coeff_suffix_decode(HEVCContext *s,
int last_significant_coeff_prefix)
{
int i;
return value;
}
-int ff_hevc_significant_coeff_group_flag_decode(HEVCContext *s, int c_idx, int x_cg,
- int y_cg, int log2_trafo_size)
+static av_always_inline int significant_coeff_group_flag_decode(HEVCContext *s, int c_idx, int ctx_cg)
{
- int ctx_cg = 0;
int inc;
- if (x_cg < (1 << (log2_trafo_size - 2)) - 1)
- ctx_cg += s->HEVClc.rc.significant_coeff_group_flag[x_cg + 1][y_cg];
- if (y_cg < (1 << (log2_trafo_size - 2)) - 1)
- ctx_cg += s->HEVClc.rc.significant_coeff_group_flag[x_cg][y_cg + 1];
-
inc = FFMIN(ctx_cg, 1) + (c_idx>0 ? 2 : 0);
return GET_CABAC(elem_offset[SIGNIFICANT_COEFF_GROUP_FLAG] + inc);
}
-int ff_hevc_significant_coeff_flag_decode(HEVCContext *s, int c_idx, int x_c, int y_c,
- int log2_trafo_size, int scan_idx)
+static av_always_inline int significant_coeff_flag_decode(HEVCContext *s, int c_idx, int x_c, int y_c,
+ int log2_trafo_size, int scan_idx, int prev_sig)
{
static const uint8_t ctx_idx_map[] = {
0, 1, 4, 5, 2, 3, 4, 5, 6, 6, 8, 8, 7, 7, 8, 8
} else if (log2_trafo_size == 2) {
sig_ctx = ctx_idx_map[(y_c << 2) + x_c];
} else {
- int prev_sig = 0;
-
- if (x_cg < ((1 << log2_trafo_size) - 1) >> 2)
- prev_sig += s->HEVClc.rc.significant_coeff_group_flag[x_cg + 1][y_cg];
- if (y_cg < ((1 << log2_trafo_size) - 1) >> 2)
- prev_sig += (s->HEVClc.rc.significant_coeff_group_flag[x_cg][y_cg + 1] << 1);
-
switch (prev_sig) {
case 0: {
int x_off = x_c & 3;
return GET_CABAC(elem_offset[SIGNIFICANT_COEFF_FLAG] + inc);
}
-int ff_hevc_coeff_abs_level_greater1_flag_decode(HEVCContext *s, int c_idx,
- int i, int n,
- int first_elem,
- int first_subset)
+static av_always_inline int coeff_abs_level_greater1_flag_decode(HEVCContext *s, int c_idx, int inc)
{
- int inc;
-
- if (first_elem) {
- s->HEVClc.ctx_set = (i > 0 && c_idx == 0) ? 2 : 0;
-
- if (!first_subset && s->HEVClc.greater1_ctx == 0)
- s->HEVClc.ctx_set++;
- s->HEVClc.greater1_ctx = 1;
- }
-
- inc = (s->HEVClc.ctx_set << 2) + s->HEVClc.greater1_ctx;
if (c_idx > 0)
inc += 16;
- s->HEVClc.last_coeff_abs_level_greater1_flag =
- GET_CABAC(elem_offset[COEFF_ABS_LEVEL_GREATER1_FLAG] + inc);
-
- if (s->HEVClc.last_coeff_abs_level_greater1_flag) {
- s->HEVClc.greater1_ctx = 0;
- } else if (s->HEVClc.greater1_ctx > 0 && s->HEVClc.greater1_ctx < 3) {
- s->HEVClc.greater1_ctx++;
- }
-
- return s->HEVClc.last_coeff_abs_level_greater1_flag;
+ return GET_CABAC(elem_offset[COEFF_ABS_LEVEL_GREATER1_FLAG] + inc);
}
-int ff_hevc_coeff_abs_level_greater2_flag_decode(HEVCContext *s, int c_idx,
- int i, int n)
+static av_always_inline int coeff_abs_level_greater2_flag_decode(HEVCContext *s, int c_idx, int inc)
{
- int inc;
-
- inc = s->HEVClc.ctx_set;
if (c_idx > 0)
inc += 4;
return GET_CABAC(elem_offset[COEFF_ABS_LEVEL_GREATER2_FLAG] + inc);
}
-int ff_hevc_coeff_abs_level_remaining(HEVCContext *s, int first_elem, int base_level)
+static av_always_inline int coeff_abs_level_remaining_decode(HEVCContext *s, int base_level, int rc_rice_param)
{
- int i;
- HEVCLocalContext *lc = &s->HEVClc;
int prefix = 0;
int suffix = 0;
-
- if (first_elem) {
- lc->c_rice_param = 0;
- lc->last_coeff_abs_level_remaining = 0;
- }
+ int last_coeff_abs_level_remaining;
+ int i;
while (prefix < CABAC_MAX_BIN && get_cabac_bypass(&s->HEVClc.cc))
prefix++;
if (prefix == CABAC_MAX_BIN)
av_log(s->avctx, AV_LOG_ERROR, "CABAC_MAX_BIN : %d\n", prefix);
if (prefix < 3) {
- for (i = 0; i < lc->c_rice_param; i++)
+ for (i = 0; i < rc_rice_param; i++)
suffix = (suffix << 1) | get_cabac_bypass(&s->HEVClc.cc);
- lc->last_coeff_abs_level_remaining = (prefix << lc->c_rice_param) + suffix;
+ last_coeff_abs_level_remaining = (prefix << rc_rice_param) + suffix;
} else {
- for (i = 0; i < prefix - 3 + lc->c_rice_param; i++)
+ int prefix_minus3 = prefix - 3;
+ for (i = 0; i < prefix_minus3 + rc_rice_param; i++)
suffix = (suffix << 1) | get_cabac_bypass(&s->HEVClc.cc);
- lc->last_coeff_abs_level_remaining = (((1 << (prefix - 3)) + 3 - 1)
- << lc->c_rice_param) + suffix;
+ last_coeff_abs_level_remaining = (((1 << prefix_minus3) + 3 - 1)
+ << rc_rice_param) + suffix;
}
-
- lc->c_rice_param = FFMIN(lc->c_rice_param +
- ((base_level + lc->last_coeff_abs_level_remaining) >
- (3 * (1 << lc->c_rice_param))), 4);
-
- return lc->last_coeff_abs_level_remaining;
+ return last_coeff_abs_level_remaining;
}
-int ff_hevc_coeff_sign_flag(HEVCContext *s, uint8_t nb)
+static av_always_inline int coeff_sign_flag_decode(HEVCContext *s, uint8_t nb)
{
int i;
int ret = 0;
ret = (ret << 1) | get_cabac_bypass(&s->HEVClc.cc);
return ret;
}
+
+void ff_hevc_hls_residual_coding(HEVCContext *s, int x0, int y0,
+ int log2_trafo_size, enum ScanType scan_idx,
+ int c_idx)
+{
+#define GET_COORD(offset, n) \
+ do { \
+ x_c = (scan_x_cg[offset >> 4] << 2) + scan_x_off[n]; \
+ y_c = (scan_y_cg[offset >> 4] << 2) + scan_y_off[n]; \
+ } while (0)
+ HEVCLocalContext *lc = &s->HEVClc;
+ int transform_skip_flag = 0;
+
+ int last_significant_coeff_x, last_significant_coeff_y;
+ int last_scan_pos;
+ int n_end;
+ int num_coeff = 0;
+ int greater1_ctx = 1;
+
+ int num_last_subset;
+ int x_cg_last_sig, y_cg_last_sig;
+
+ const uint8_t *scan_x_cg, *scan_y_cg, *scan_x_off, *scan_y_off;
+
+ ptrdiff_t stride = s->frame->linesize[c_idx];
+ int hshift = s->sps->hshift[c_idx];
+ int vshift = s->sps->vshift[c_idx];
+ uint8_t *dst = &s->frame->data[c_idx][(y0 >> vshift) * stride +
+ ((x0 >> hshift) << s->sps->pixel_shift)];
+ DECLARE_ALIGNED(16, int16_t, coeffs[MAX_TB_SIZE * MAX_TB_SIZE]) = {0};
+ DECLARE_ALIGNED(8, uint8_t, significant_coeff_group_flag[8][8]) = {{0}};
+
+ int trafo_size = 1 << log2_trafo_size;
+ int i;
+ int qp,shift,add,scale,scale_m;
+ const uint8_t level_scale[] = { 40, 45, 51, 57, 64, 72 };
+ const uint8_t *scale_matrix;
+ uint8_t dc_scale;
+
+ // Derive QP for dequant
+ if (!lc->cu.cu_transquant_bypass_flag) {
+ static const int qp_c[] = { 29, 30, 31, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37 };
+ static const uint8_t rem6[51 + 2 * 6 + 1] = {
+ 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2,
+ 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5,
+ 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
+ };
+
+ static const uint8_t div6[51 + 2 * 6 + 1] = {
+ 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3,
+ 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6,
+ 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10,
+ };
+ int qp_y = lc->qp_y;
+
+ if (c_idx == 0) {
+ qp = qp_y + s->sps->qp_bd_offset;
+ } else {
+ int qp_i, offset;
+
+ if (c_idx == 1)
+ offset = s->pps->cb_qp_offset + s->sh.slice_cb_qp_offset;
+ else
+ offset = s->pps->cr_qp_offset + s->sh.slice_cr_qp_offset;
+
+ qp_i = av_clip_c(qp_y + offset, - s->sps->qp_bd_offset, 57);
+ if (qp_i < 30)
+ qp = qp_i;
+ else if (qp_i > 43)
+ qp = qp_i - 6;
+ else
+ qp = qp_c[qp_i - 30];
+
+ qp += s->sps->qp_bd_offset;
+ }
+
+ shift = s->sps->bit_depth + log2_trafo_size - 5;
+ add = 1 << (shift-1);
+ scale = level_scale[rem6[qp]] << (div6[qp]);
+ scale_m = 16; // default when no custom scaling lists.
+ dc_scale = 16;
+
+ if (s->sps->scaling_list_enable_flag) {
+ const ScalingList *sl = s->pps->pps_scaling_list_data_present_flag ?
+ &s->pps->scaling_list : &s->sps->scaling_list;
+ int matrix_id = lc->cu.pred_mode != MODE_INTRA;
+
+ if (log2_trafo_size != 5)
+ matrix_id = 3 * matrix_id + c_idx;
+
+ scale_matrix = sl->sl[log2_trafo_size - 2][matrix_id];
+ if (log2_trafo_size >= 4)
+ dc_scale = sl->sl_dc[log2_trafo_size - 4][matrix_id];
+ }
+ }
+
+ if (s->pps->transform_skip_enabled_flag && !lc->cu.cu_transquant_bypass_flag &&
+ log2_trafo_size == 2) {
+ transform_skip_flag = ff_hevc_transform_skip_flag_decode(s, c_idx);
+ }
+
+ last_significant_coeff_x =
+ last_significant_coeff_x_prefix_decode(s, c_idx, log2_trafo_size);
+ last_significant_coeff_y =
+ last_significant_coeff_y_prefix_decode(s, c_idx, log2_trafo_size);
+
+ if (last_significant_coeff_x > 3) {
+ int suffix = last_significant_coeff_suffix_decode(s, last_significant_coeff_x);
+ last_significant_coeff_x = (1 << ((last_significant_coeff_x >> 1) - 1)) *
+ (2 + (last_significant_coeff_x & 1)) +
+ suffix;
+ }
+
+ if (last_significant_coeff_y > 3) {
+ int suffix = last_significant_coeff_suffix_decode(s, last_significant_coeff_y);
+ last_significant_coeff_y = (1 << ((last_significant_coeff_y >> 1) - 1)) *
+ (2 + (last_significant_coeff_y & 1)) +
+ suffix;
+ }
+
+ if (scan_idx == SCAN_VERT)
+ FFSWAP(int, last_significant_coeff_x, last_significant_coeff_y);
+
+ x_cg_last_sig = last_significant_coeff_x >> 2;
+ y_cg_last_sig = last_significant_coeff_y >> 2;
+
+ switch (scan_idx) {
+ case SCAN_DIAG: {
+ int last_x_c = last_significant_coeff_x & 3;
+ int last_y_c = last_significant_coeff_y & 3;
+
+ scan_x_off = ff_hevc_diag_scan4x4_x;
+ scan_y_off = ff_hevc_diag_scan4x4_y;
+ num_coeff = diag_scan4x4_inv[last_y_c][last_x_c];
+ if (trafo_size == 4) {
+ scan_x_cg = scan_1x1;
+ scan_y_cg = scan_1x1;
+ } else if (trafo_size == 8) {
+ num_coeff += diag_scan2x2_inv[y_cg_last_sig][x_cg_last_sig] << 4;
+ scan_x_cg = diag_scan2x2_x;
+ scan_y_cg = diag_scan2x2_y;
+ } else if (trafo_size == 16) {
+ num_coeff += diag_scan4x4_inv[y_cg_last_sig][x_cg_last_sig] << 4;
+ scan_x_cg = ff_hevc_diag_scan4x4_x;
+ scan_y_cg = ff_hevc_diag_scan4x4_y;
+ } else { // trafo_size == 32
+ num_coeff += diag_scan8x8_inv[y_cg_last_sig][x_cg_last_sig] << 4;
+ scan_x_cg = ff_hevc_diag_scan8x8_x;
+ scan_y_cg = ff_hevc_diag_scan8x8_y;
+ }
+ break;
+ }
+ case SCAN_HORIZ:
+ scan_x_cg = horiz_scan2x2_x;
+ scan_y_cg = horiz_scan2x2_y;
+ scan_x_off = horiz_scan4x4_x;
+ scan_y_off = horiz_scan4x4_y;
+ num_coeff = horiz_scan8x8_inv[last_significant_coeff_y][last_significant_coeff_x];
+ break;
+ default: //SCAN_VERT
+ scan_x_cg = horiz_scan2x2_y;
+ scan_y_cg = horiz_scan2x2_x;
+ scan_x_off = horiz_scan4x4_y;
+ scan_y_off = horiz_scan4x4_x;
+ num_coeff = horiz_scan8x8_inv[last_significant_coeff_x][last_significant_coeff_y];
+ break;
+ }
+ num_coeff++;
+ num_last_subset = (num_coeff - 1) >> 4;
+
+ for (i = num_last_subset; i >= 0; i--) {
+ int n, m;
+ int x_cg, y_cg, x_c, y_c, pos;
+ int implicit_non_zero_coeff = 0;
+ int64_t trans_coeff_level;
+ int prev_sig = 0;
+ int offset = i << 4;
+
+ uint8_t significant_coeff_flag_idx[16];
+ uint8_t nb_significant_coeff_flag = 0;
+
+ x_cg = scan_x_cg[i];
+ y_cg = scan_y_cg[i];
+
+ if ((i < num_last_subset) && (i > 0)) {
+ int ctx_cg = 0;
+ if (x_cg < (1 << (log2_trafo_size - 2)) - 1)
+ ctx_cg += significant_coeff_group_flag[x_cg + 1][y_cg];
+ if (y_cg < (1 << (log2_trafo_size - 2)) - 1)
+ ctx_cg += significant_coeff_group_flag[x_cg][y_cg + 1];
+
+ significant_coeff_group_flag[x_cg][y_cg] =
+ significant_coeff_group_flag_decode(s, c_idx, ctx_cg);
+ implicit_non_zero_coeff = 1;
+ } else {
+ significant_coeff_group_flag[x_cg][y_cg] =
+ ((x_cg == x_cg_last_sig && y_cg == y_cg_last_sig) ||
+ (x_cg == 0 && y_cg == 0));
+ }
+
+ last_scan_pos = num_coeff - offset - 1;
+
+ if (i == num_last_subset) {
+ n_end = last_scan_pos - 1;
+ significant_coeff_flag_idx[0] = last_scan_pos;
+ nb_significant_coeff_flag = 1;
+ } else {
+ n_end = 15;
+ }
+
+ if (x_cg < ((1 << log2_trafo_size) - 1) >> 2)
+ prev_sig = significant_coeff_group_flag[x_cg + 1][y_cg];
+ if (y_cg < ((1 << log2_trafo_size) - 1) >> 2)
+ prev_sig += (significant_coeff_group_flag[x_cg][y_cg + 1] << 1);
+
+ for (n = n_end; n >= 0; n--) {
+ GET_COORD(offset, n);
+
+ if (significant_coeff_group_flag[x_cg][y_cg] &&
+ (n > 0 || implicit_non_zero_coeff == 0)) {
+ if (significant_coeff_flag_decode(s, c_idx, x_c, y_c, log2_trafo_size, scan_idx, prev_sig) == 1) {
+ significant_coeff_flag_idx[nb_significant_coeff_flag] = n;
+ nb_significant_coeff_flag++;
+ implicit_non_zero_coeff = 0;
+ }
+ } else {
+ int last_cg = (x_c == (x_cg << 2) && y_c == (y_cg << 2));
+ if (last_cg && implicit_non_zero_coeff && significant_coeff_group_flag[x_cg][y_cg]) {
+ significant_coeff_flag_idx[nb_significant_coeff_flag] = n;
+ nb_significant_coeff_flag++;
+ }
+ }
+ }
+
+ n_end = nb_significant_coeff_flag;
+
+
+ if (n_end) {
+ int first_nz_pos_in_cg = 16;
+ int last_nz_pos_in_cg = -1;
+ int c_rice_param = 0;
+ int first_greater1_coeff_idx = -1;
+ uint8_t coeff_abs_level_greater1_flag[16] = {0};
+ uint16_t coeff_sign_flag;
+ int sum_abs = 0;
+ int sign_hidden = 0;
+
+ // initialize first elem of coeff_bas_level_greater1_flag
+ int ctx_set = (i > 0 && c_idx == 0) ? 2 : 0;
+
+ if (!(i == num_last_subset) && greater1_ctx == 0)
+ ctx_set++;
+ greater1_ctx = 1;
+ last_nz_pos_in_cg = significant_coeff_flag_idx[0];
+
+ for (m = 0; m < (n_end > 8 ? 8 : n_end); m++) {
+ int n_idx = significant_coeff_flag_idx[m];
+ int inc = (ctx_set << 2) + greater1_ctx;
+ coeff_abs_level_greater1_flag[n_idx] =
+ coeff_abs_level_greater1_flag_decode(s, c_idx, inc);
+ if (coeff_abs_level_greater1_flag[n_idx]) {
+ greater1_ctx = 0;
+ } else if (greater1_ctx > 0 && greater1_ctx < 3) {
+ greater1_ctx++;
+ }
+
+ if (coeff_abs_level_greater1_flag[n_idx] &&
+ first_greater1_coeff_idx == -1)
+ first_greater1_coeff_idx = n_idx;
+ }
+ first_nz_pos_in_cg = significant_coeff_flag_idx[n_end - 1];
+ sign_hidden = (last_nz_pos_in_cg - first_nz_pos_in_cg >= 4 &&
+ !lc->cu.cu_transquant_bypass_flag);
+
+ if (first_greater1_coeff_idx != -1) {
+ coeff_abs_level_greater1_flag[first_greater1_coeff_idx] += coeff_abs_level_greater2_flag_decode(s, c_idx, ctx_set);
+ }
+ if (!s->pps->sign_data_hiding_flag || !sign_hidden ) {
+ coeff_sign_flag = coeff_sign_flag_decode(s, nb_significant_coeff_flag) << (16 - nb_significant_coeff_flag);
+ } else {
+ coeff_sign_flag = coeff_sign_flag_decode(s, nb_significant_coeff_flag - 1) << (16 - (nb_significant_coeff_flag - 1));
+ }
+
+ for (m = 0; m < n_end; m++) {
+ n = significant_coeff_flag_idx[m];
+ GET_COORD(offset, n);
+ trans_coeff_level = 1 + coeff_abs_level_greater1_flag[n];
+ if (trans_coeff_level == ((m < 8) ?
+ ((n == first_greater1_coeff_idx) ? 3 : 2) : 1)) {
+ int last_coeff_abs_level_remaining = coeff_abs_level_remaining_decode(s, trans_coeff_level, c_rice_param);
+
+ trans_coeff_level += last_coeff_abs_level_remaining;
+ if ((trans_coeff_level) > (3 * (1 << c_rice_param)))
+ c_rice_param = FFMIN(c_rice_param + 1, 4);
+
+ }
+ if (s->pps->sign_data_hiding_flag && sign_hidden) {
+ sum_abs += trans_coeff_level;
+ if (n == first_nz_pos_in_cg && ((sum_abs&1) == 1))
+ trans_coeff_level = -trans_coeff_level;
+ }
+ if (coeff_sign_flag >> 15)
+ trans_coeff_level = -trans_coeff_level;
+ coeff_sign_flag <<= 1;
+ if(!lc->cu.cu_transquant_bypass_flag) {
+ if(s->sps->scaling_list_enable_flag) {
+ if(y_c || x_c || log2_trafo_size < 4) {
+ switch(log2_trafo_size) {
+ case 3: pos = (y_c << 3) + x_c; break;
+ case 4: pos = ((y_c >> 1) << 3) + (x_c >> 1); break;
+ case 5: pos = ((y_c >> 2) << 3) + (x_c >> 2); break;
+ default: pos = (y_c << 2) + x_c;
+ }
+ scale_m = scale_matrix[pos];
+ } else {
+ scale_m = dc_scale;
+ }
+ }
+ trans_coeff_level = (trans_coeff_level * (int64_t)scale * (int64_t)scale_m + add) >> shift;
+ if(trans_coeff_level < 0) {
+ if((~trans_coeff_level) & 0xFffffffffff8000)
+ trans_coeff_level = -32768;
+ } else {
+ if(trans_coeff_level & 0xffffffffffff8000)
+ trans_coeff_level = 32767;
+ }
+ }
+ coeffs[y_c * trafo_size + x_c] = trans_coeff_level;
+ }
+ }
+ }
+
+ if (lc->cu.cu_transquant_bypass_flag) {
+ s->hevcdsp.transquant_bypass[log2_trafo_size-2](dst, coeffs, stride);
+ } else {
+ if (transform_skip_flag)
+ s->hevcdsp.transform_skip(dst, coeffs, stride);
+ else if (lc->cu.pred_mode == MODE_INTRA && c_idx == 0 && log2_trafo_size == 2)
+ s->hevcdsp.transform_4x4_luma_add(dst, coeffs, stride);
+ else
+ s->hevcdsp.transform_add[log2_trafo_size-2](dst, coeffs, stride);
+ }
+}
+
projects / ffmpeg / blobdiff