Slightly improve QR code speed

Makefile

@@ -49,7 +49,7 @@ ICON_FLAGS          :=	nosavebackups,visible
 #---------------------------------------------------------------------------------
 ARCH	:=	-march=armv6k -mtune=mpcore -mfloat-abi=hard -mtp=soft
 
-CFLAGS	:=	-g -Wall -Wextra -mword-relocations \
+CFLAGS	:=	-g -Wall -Wextra -O2 -mword-relocations \
 			-ffunction-sections \
 			$(ARCH)
 

include/camera.h

@@ -29,8 +29,6 @@
 
 #include "common.h"
 
-struct quirc* context;
-u16 *buf;
 bool qr_mode;
 
 void init_qr(void);

include/draw.h

@@ -35,7 +35,6 @@ void init_screens(void);
 void exit_screens(void);
 
 void draw_themext_error(void);
-void draw_qr(void);
 void draw_base_interface(void);
 void draw_theme_install(int install_type);
 void draw_theme_interface(Theme_s * themes_list, int theme_count, int selected_theme, bool preview_mode, int shuffle_theme_count);

source/camera.c

@@ -30,9 +30,11 @@
 #include "draw.h"
 #include "fs.h"
 #include "themes.h"
+#include "pp2d/pp2d/pp2d.h"
 
 u32 transfer_size;
 Handle event;
+struct quirc* context;
 
 void init_qr(void)
 {
@@ -47,8 +49,6 @@ void init_qr(void)
     CAMU_SetTrimming(PORT_CAM1, false);
     CAMU_SetTrimming(PORT_CAM2, false);
 
-    buf = malloc(sizeof(u16) * 400 * 240 * 2);
-
     CAMU_GetMaxBytes(&transfer_size, 400, 240);
     CAMU_SetTransferBytes(PORT_BOTH, transfer_size, 400, 240);
 
@@ -69,14 +69,65 @@ void exit_qr(void)
     CAMU_Activate(SELECT_NONE);
     camExit();
     quirc_destroy(context);
-    free(buf);
+}
+
+void scan_qr(u16 *buf)
+{
+    int w;
+    int h;
+
+    u8 *image = (u8*) quirc_begin(context, &w, &h);
+
+    for (ssize_t x = 0; x < w; x++)
+    {
+        for (ssize_t y = 0; y < h; y++)
+        {
+            u16 px = buf[y * 400 + x];
+            image[y * w + x] = (u8)(((((px >> 11) & 0x1F) << 3) + (((px >> 5) & 0x3F) << 2) + ((px & 0x1F) << 3)) / 3);
+        }
+    }
+
+    quirc_end(context);
+
+    if (quirc_count(context) > 0)
+    {
+        struct quirc_code code;
+        struct quirc_data data;
+        quirc_extract(context, 0, &code);
+        if (!quirc_decode(&code, &data))
+        {
+            qr_mode = false;
+
+            http_get((char*)data.payload, "/Themes/");
+        }
+    }
 }
 
 void take_picture(void)
 {
+    u16 *buf = malloc(sizeof(u16) * 400 * 240 * 4);
+    if (buf == NULL) return;
     CAMU_SetReceiving(&event, buf, PORT_CAM1, 240 * 400 * 2, transfer_size);
     svcWaitSynchronization(event, U64_MAX);
     svcCloseHandle(event);
+    CAMU_StopCapture(PORT_BOTH);
+    CAMU_Activate(SELECT_NONE);
+    pp2d_begin_draw(GFX_TOP);
+    u32 *rgba8_buf = malloc(240 * 400 * sizeof(u32));
+    if (rgba8_buf == NULL) return;
+    for (int i = 0; i < 240 * 400; i++)
+    {
+        rgba8_buf[i] = RGB565_TO_ABGR8(buf[i]);
+    }
+    pp2d_load_texture_memory(TEXTURE_QR, rgba8_buf, 400, 240);
+    pp2d_draw_texture(TEXTURE_QR, 0, 0);
+    pp2d_end_draw();
+    free(rgba8_buf);
+    pp2d_free_texture(TEXTURE_QR);
+    scan_qr(buf);
+    free(buf);
+    CAMU_Activate(SELECT_OUT1_OUT2);
+    CAMU_StartCapture(PORT_BOTH);
 }
 
 /*

source/draw.c

@@ -73,57 +73,6 @@ void draw_themext_error(void)
     throw_error("Theme extdata does not exist\nSet a default theme from the home menu", ERROR);
 }
 
-void draw_qr(void)
-{
-    take_picture();
-    pp2d_begin_draw(GFX_TOP);
-    pp2d_free_texture(TEXTURE_QR);
-    u32 *rgba8_buf = malloc(240 * 400 * sizeof(u32));
-    for (int i = 0; i < 240 * 400; i++)
-    {
-        rgba8_buf[i] = RGB565_TO_RGBA8(buf[i]);
-        u8 *byte_pointer = (u8*)&rgba8_buf[i];
-        u8 r = *(byte_pointer+3);
-        u8 g = *(byte_pointer+2);
-        u8 b = *(byte_pointer+1);
-        u8 a = *(byte_pointer);
-        rgba8_buf[i] = RGBA8(r, g, b, a);
-    }
-    pp2d_load_texture_memory(TEXTURE_QR, rgba8_buf, 400, 240);
-    pp2d_draw_texture(TEXTURE_QR, 0, 0);
-    free(rgba8_buf);
-    pp2d_end_draw();
-
-    int w;
-    int h;
-
-    u8 *image = (u8*) quirc_begin(context, &w, &h);
-
-    for (ssize_t x = 0; x < w; x++)
-    {
-        for (ssize_t y = 0; y < h; y++)
-        {
-            u16 px = buf[y * 400 + x];
-            image[y * w + x] = (u8)(((((px >> 11) & 0x1F) << 3) + (((px >> 5) & 0x3F) << 2) + ((px & 0x1F) << 3)) / 3);
-        }
-    }
-
-    quirc_end(context);
-
-    if (quirc_count(context) > 0)
-    {
-        struct quirc_code code;
-        struct quirc_data data;
-        quirc_extract(context, 0, &code);
-        if (!quirc_decode(&code, &data))
-        {
-            qr_mode = false;
-
-            http_get((char*)data.payload, "/Themes/");
-        }
-    }
-}
-
 void draw_base_interface(void)
 {
     pp2d_begin_draw(GFX_TOP);

source/main.c

@@ -105,7 +105,7 @@ int main(void)
         
         if (qr_mode) 
         {
-            draw_qr();
+            take_picture();
         } else if (!splash_mode)
         {
             draw_theme_interface(themes_list, theme_count, selected_theme, preview_mode, shuffle_theme_count);