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Add Scanline contrast 

Reduce scanline strength for bright pixels
This commit is contained in:
paulb-nl 2018-02-20 22:24:52 +01:00
parent 9a2c9bb020
commit 990bc1563e
6 changed files with 1051 additions and 1015 deletions
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2
ossc.qsf
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@ -225,7 +225,7 @@ set_global_assignment -name USE_SIGNALTAP_FILE output_files/ossc_la.stp
set_global_assignment -name FITTER_EFFORT "AUTO FIT"
set_global_assignment -name SEED 2
set_global_assignment -name SEED 5

37
rtl/scanconverter.v
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@ -42,6 +42,9 @@
`define SCANLINES_V 2'h2
`define SCANLINES_ALT 2'h3
`define SCANLINES_CONTRAST_LOW 2'h1
`define SCANLINES_CONTRAST_HIGH 2'h2
`define VSYNCGEN_LEN 6
`define VSYNCGEN_GENMID_BIT 0
`define VSYNCGEN_CHOPMID_BIT 1
@ -100,6 +103,8 @@ reg [7:0] R_in_L, G_in_L, B_in_L, R_in_LL, G_in_LL, B_in_LL, R_1x, G_1x, B_1x;
reg [7:0] R_pp3, G_pp3, B_pp3, R_pp4, G_pp4, B_pp4, R_pp5, G_pp5, B_pp5, R_pp6, G_pp6, B_pp6;
reg [7:0] R_prev_pp2, G_prev_pp2, B_prev_pp2, R_prev_pp3, G_prev_pp3, B_prev_pp3, R_prev_pp4, G_prev_pp4, B_prev_pp4;
reg signed [14:0] R_diff_pp3, G_diff_pp3, B_diff_pp3, R_diff_pp4, G_diff_pp4, B_diff_pp4;
reg [7:0] R_sl_contrast_pp4, G_sl_contrast_pp4, B_sl_contrast_pp4, R_scanline_str_pp5, G_scanline_str_pp5, B_scanline_str_pp5;
//H+V syncs + data enable signals&registers
wire HSYNC_act, VSYNC_act, DE_act;
@ -163,8 +168,10 @@ reg [9:0] H_L5BORDER;
reg [3:0] X_MASK_BR;
reg [7:0] X_SCANLINESTR;
reg [5:0] X_REV_LPF_STR;
reg [1:0] H_SL_CONTRAST;
reg X_REV_LPF_ENABLE;
//clk27 related registers
reg VSYNC_in_cc_L, VSYNC_in_cc_LL, VSYNC_in_cc_LLL;
reg [21:0] clk27_ctr; // min. 6.5Hz
@ -175,6 +182,20 @@ assign pclk_1x = PCLK_in;
assign PCLK_out = pclk_act;
assign pclk_lock = {pclk_2x_lock, pclk_3x_lock};
//Scanline contrast. Bright pixels decrease scanline strength.
function [7:0] apply_scanline_strength;
input [7:0] str;
input [7:0] data;
input [1:0] contrast;
begin
if (contrast)
apply_scanline_strength = (str > data) ? (str - data) : 8'h00;
else
apply_scanline_strength = str;
end
endfunction
//Scanline generation
function [7:0] apply_scanlines;
input [1:0] mode;
@ -184,6 +205,7 @@ function [7:0] apply_scanlines;
input [2:0] line_id;
input [2:0] col_id;
input fid;
begin
if ((mode == `SCANLINES_H) && (mask & (5'h1<<line_id)))
apply_scanlines = (data > str) ? (data-str) : 8'h00;
@ -492,6 +514,10 @@ begin
R_diff_pp4 <= (R_diff_pp3 * X_REV_LPF_STR);
G_diff_pp4 <= (G_diff_pp3 * X_REV_LPF_STR);
B_diff_pp4 <= (B_diff_pp3 * X_REV_LPF_STR);
// Scanline contrast Low (62%) and High (87%) setting.
R_sl_contrast_pp4 <= (H_SL_CONTRAST == `SCANLINES_CONTRAST_HIGH) ? (R_pp3 - (R_pp3 >> 3)) : ((R_pp3 >> 1) + (R_pp3 >> 3));
G_sl_contrast_pp4 <= (H_SL_CONTRAST == `SCANLINES_CONTRAST_HIGH) ? (G_pp3 - (G_pp3 >> 3)) : ((G_pp3 >> 1) + (G_pp3 >> 3));
B_sl_contrast_pp4 <= (H_SL_CONTRAST == `SCANLINES_CONTRAST_HIGH) ? (B_pp3 - (B_pp3 >> 3)) : ((B_pp3 >> 1) + (B_pp3 >> 3));
R_pp5 <= apply_reverse_lpf(X_REV_LPF_ENABLE, R_pp4, R_prev_pp4, R_diff_pp4);
G_pp5 <= apply_reverse_lpf(X_REV_LPF_ENABLE, G_pp4, G_prev_pp4, G_diff_pp4);
@ -503,10 +529,13 @@ begin
col_id_pp5 <= col_id_pp4;
border_enable_pp5 <= border_enable_pp4;
lt_box_enable_pp5 <= lt_box_enable_pp4;
R_scanline_str_pp5 <= apply_scanline_strength(X_SCANLINESTR, R_sl_contrast_pp4, H_SL_CONTRAST);
G_scanline_str_pp5 <= apply_scanline_strength(X_SCANLINESTR, G_sl_contrast_pp4, H_SL_CONTRAST);
B_scanline_str_pp5 <= apply_scanline_strength(X_SCANLINESTR, B_sl_contrast_pp4, H_SL_CONTRAST);
R_pp6 <= apply_scanlines(V_SCANLINEMODE, R_pp5, X_SCANLINESTR, V_SCANLINEID, line_id_pp5, col_id_pp5, FID_1x);
G_pp6 <= apply_scanlines(V_SCANLINEMODE, G_pp5, X_SCANLINESTR, V_SCANLINEID, line_id_pp5, col_id_pp5, FID_1x);
B_pp6 <= apply_scanlines(V_SCANLINEMODE, B_pp5, X_SCANLINESTR, V_SCANLINEID, line_id_pp5, col_id_pp5, FID_1x);
R_pp6 <= apply_scanlines(V_SCANLINEMODE, R_pp5, R_scanline_str_pp5, V_SCANLINEID, line_id_pp5, col_id_pp5, FID_1x);
G_pp6 <= apply_scanlines(V_SCANLINEMODE, G_pp5, G_scanline_str_pp5, V_SCANLINEID, line_id_pp5, col_id_pp5, FID_1x);
B_pp6 <= apply_scanlines(V_SCANLINEMODE, B_pp5, B_scanline_str_pp5, V_SCANLINEID, line_id_pp5, col_id_pp5, FID_1x);
HSYNC_pp6 <= HSYNC_pp5;
VSYNC_pp6 <= VSYNC_pp5;
DE_pp6 <= DE_pp5;
@ -688,6 +717,8 @@ begin
H_OPT_SAMPLE_MULT <= h_info2[12:10];
H_OPT_STARTOFF <= h_info2[9:0];
H_SL_CONTRAST <= extra_info[14:13];
X_REV_LPF_ENABLE <= (extra_info[12:8] != 5'b00000);
X_REV_LPF_STR <= (extra_info[12:8] + 6'd16);

2014
software/sys_controller/mem_init/sys_onchip_memory2_0.hex
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File diff suppressed because it is too large Load Diff

10
software/sys_controller/ossc/av_controller.c
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@ -307,7 +307,8 @@ status_t get_status(tvp_input_t input, video_format format)
(tc.v_mask != cm.cc.v_mask) ||
(tc.mask_br != cm.cc.mask_br) ||
(tc.ar_256col != cm.cc.ar_256col) ||
(tc.reverse_lpf != cm.cc.reverse_lpf))
(tc.reverse_lpf != cm.cc.reverse_lpf) ||
(tc.sl_contrast != cm.cc.sl_contrast))
status = (status < INFO_CHANGE) ? INFO_CHANGE : status;
if (tc.sampler_phase != cm.cc.sampler_phase) {
@ -365,8 +366,8 @@ status_t get_status(tvp_input_t input, video_format format)
// v_info: [31:29] [28:27] [26] [25:20] [19:17] [16:11] [10:0]
// | V_MULTMODE[2:0] | V_SCANLINEMODE[1:0] | V_SCANLINEID | V_MASK[5:0] | V_SYNCLEN[2:0] | V_BACKPORCH[5:0] | V_ACTIVE[10:0] |
//
// extra: [31:13] [12:8] [7:4] [3:0]
// | | X_REV_LPF_STR | H_MASK_BR[3:0] | H_SCANLINESTR[3:0] |
// extra: [31:15] [14:13] [12:8] [7:4] [3:0]
// | | H_SL_CONTRAST | X_REV_LPF_STR | H_MASK_BR[3:0] | H_SCANLINESTR[3:0] |
//
void set_videoinfo()
{
@ -461,7 +462,8 @@ void set_videoinfo()
(video_modes[cm.id].v_synclen<<17) |
(v_backporch<<11) |
v_active);
IOWR_ALTERA_AVALON_PIO_DATA(PIO_6_BASE, (cm.cc.reverse_lpf<<8) |
IOWR_ALTERA_AVALON_PIO_DATA(PIO_6_BASE, (cm.cc.sl_contrast<<13) |
(cm.cc.reverse_lpf<<8) |
(cm.cc.mask_br<<4) |
cm.cc.sl_str);
}

1
software/sys_controller/ossc/avconfig.h
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@ -79,6 +79,7 @@ typedef struct {
alt_u8 full_tx_setup;
alt_u8 vga_ilace_fix;
alt_u8 reverse_lpf;
alt_u8 sl_contrast;
#ifdef ENABLE_AUDIO
alt_u8 audio_dw_sampl;
alt_u8 audio_swap_lr;

2
software/sys_controller/ossc/menu.c
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@ -64,6 +64,7 @@ static const char *sl_type_desc[] = { LNG("Horizontal","ﾖｺ"), LNG("Vertical"
static const char *sl_id_desc[] = { LNG("Top","ｳｴ"), LNG("Bottom","ｼﾀ") };
static const char *audio_dw_sampl_desc[] = { LNG("Off (fs = 96kHz)","ｵﾌ (fs = 96kHz)"), "2x (fs = 48kHz)" };
static const char *lt_desc[] = { "Top-left", "Center", "Bottom-right" };
static const char *sl_contrast_desc[] = { LNG("Off","ｵﾌ"), "Low", "High" };
static void sampler_phase_disp(alt_u8 v) { sniprintf(menu_row2, LCD_ROW_LEN+1, LNG("%d deg","%d ﾄﾞ"), (v*1125)/100); }
static void sync_vth_disp(alt_u8 v) { sniprintf(menu_row2, LCD_ROW_LEN+1, "%d mV", (v*1127)/100); }
@ -141,6 +142,7 @@ MENU(menu_postproc, P99_PROTECT({ \
{ LNG("Scanline str.","ｽｷｬﾝﾗｲﾝﾂﾖｻ"), OPT_AVCONFIG_NUMVALUE, { .num = { &tc.sl_str, OPT_NOWRAP, 0, SCANLINESTR_MAX, sl_str_disp } } },
{ LNG("Scanline type","ｽｷｬﾝﾗｲﾝﾙｲ"), OPT_AVCONFIG_SELECTION, { .sel = { &tc.sl_type, OPT_WRAP, SETTING_ITEM(sl_type_desc) } } },
{ LNG("Scanline alignm.","ｽｷｬﾝﾗｲﾝﾎﾟｼﾞｼｮﾝ"), OPT_AVCONFIG_SELECTION, { .sel = { &tc.sl_id, OPT_WRAP, SETTING_ITEM(sl_id_desc) } } },
{ "ScanlineContrast", OPT_AVCONFIG_SELECTION, { .sel = { &tc.sl_contrast, OPT_WRAP, SETTING_ITEM(sl_contrast_desc) } } },
{ LNG("Horizontal mask","ｽｲﾍｲﾏｽｸ"), OPT_AVCONFIG_NUMVALUE, { .num = { &tc.h_mask, OPT_NOWRAP, 0, HV_MASK_MAX, pixels_disp } } },
{ LNG("Vertical mask","ｽｲﾁｮｸﾏｽｸ"), OPT_AVCONFIG_NUMVALUE, { .num = { &tc.v_mask, OPT_NOWRAP, 0, HV_MASK_MAX, pixels_disp } } },
{ LNG("Mask brightness","ﾏｽｸｱｶﾙｻ"), OPT_AVCONFIG_NUMVALUE, { .num = { &tc.mask_br, OPT_NOWRAP, 0, HV_MASK_MAX_BR, value_disp } } },