Gba filter (#13613)

New GBA filter Upscale_240x160-320x240

Makefile.common

@@ -2395,7 +2395,8 @@ ifeq ($(HAVE_STATIC_VIDEO_FILTERS), 1)
           gfx/video_filters/dot_matrix_4x.o \
           gfx/video_filters/upscale_1_5x.o \
           gfx/video_filters/upscale_256x_320x240.o \
-          gfx/video_filters/picoscale_256x_320x240.o
+          gfx/video_filters/picoscale_256x_320x240.o \
+          gfx/video_filters/upscale_240x160_320x240.o
 endif
 
 ifeq ($(WANT_IOSUHAX), 1)

gfx/video_filter.c

@@ -293,6 +293,7 @@ extern const struct softfilter_implementation *dot_matrix_4x_get_implementation(
 extern const struct softfilter_implementation *upscale_1_5x_get_implementation(softfilter_simd_mask_t simd);
 extern const struct softfilter_implementation *upscale_256x_320x240_get_implementation(softfilter_simd_mask_t simd);
 extern const struct softfilter_implementation *picoscale_256x_320x240_get_implementation(softfilter_simd_mask_t simd);
+extern const struct softfilter_implementation *upscale_240x160_320x240_get_implementation(softfilter_simd_mask_t simd);
 
 static const softfilter_get_implementation_t soft_plugs_builtin[] = {
    blargg_ntsc_snes_get_implementation,
@@ -319,6 +320,7 @@ static const softfilter_get_implementation_t soft_plugs_builtin[] = {
    upscale_1_5x_get_implementation,
    upscale_256x_320x240_get_implementation,
    picoscale_256x_320x240_get_implementation,
+   upscale_240x160_320x240_get_implementation,
 };
 
 static bool append_softfilter_plugs(rarch_softfilter_t *filt,

gfx/video_filters/Makefile

@@ -127,7 +127,8 @@ objects += blargg_ntsc_snes.$(DYLIB) \
 			  dot_matrix_4x.$(DYLIB) \
 			  upscale_1_5x.$(DYLIB) \
 			  upscale_256x_320x240.$(DYLIB) \
-			  picoscale_256x_320x240.$(DYLIB)
+			  picoscale_256x_320x240.$(DYLIB) \
+			  upscale_240x160_320x240.$(DYLIB)
 
 all: build;
 

gfx/video_filters/Upscale_240x160-320x240.filt

@@ -0,0 +1,9 @@
+filter = upscale_240x160_320x240
+
+# Aspect ratio correction:
+# - 1: 240x160 content is scaled to 320x213, with
+#      padding added to the top and bottom of the
+#      image (letterboxing) to maintain the native
+#      content aspect ratio
+# - 0: 240x160 content is stretched to 320x240
+upscale_240x160_320x240_keep_aspect = "1"

gfx/video_filters/Upscale_240x160-320x240_Stretched.filt

@@ -0,0 +1,9 @@
+filter = upscale_240x160_320x240
+
+# Aspect ratio correction:
+# - 1: 240x160 content is scaled to 320x213, with
+#      padding added to the top and bottom of the
+#      image (letterboxing) to maintain the native
+#      content aspect ratio
+# - 0: 240x160 content is stretched to 320x240
+upscale_240x160_320x240_keep_aspect = "0"

gfx/video_filters/upscale_240x160_320x240.c

@@ -0,0 +1,480 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
+ *  Copyright (C) 2011-2018 - Daniel De Matteis
+ *
+ *  RetroArch is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with RetroArch.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Compile: gcc -o upscale_240x160_320x240.so -shared upscale_240x160_320x240.c -std=c99 -O3 -Wall -pedantic -fPIC */
+
+#include "softfilter.h"
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef RARCH_INTERNAL
+#define softfilter_get_implementation upscale_240x160_320x240_get_implementation
+#define softfilter_thread_data upscale_240x160_320x240_softfilter_thread_data
+#define filter_data upscale_240x160_320x240_filter_data
+#endif
+
+typedef struct
+{
+   void (*upscale_240x160_320x240)(
+         uint16_t *dst, const uint16_t *src,
+         uint16_t dst_stride, uint16_t src_stride);
+} upscale_function_t;
+
+struct softfilter_thread_data
+{
+   void *out_data;
+   const void *in_data;
+   size_t out_pitch;
+   size_t in_pitch;
+   unsigned colfmt;
+   unsigned width;
+   unsigned height;
+   int first;
+   int last;
+};
+
+struct filter_data
+{
+   unsigned threads;
+   struct softfilter_thread_data *workers;
+   unsigned in_fmt;
+   upscale_function_t function;
+};
+
+/*******************************************************************
+ * Approximately bilinear scaler, 240x160 to 320x240
+ * Copyright (C) 2014 hi-ban, Nebuleon <nebuleon.fumika@gmail.com>
+ * (Optimisations by jdgleaver)
+ *******************************************************************/
+
+#define UPSCALE_240__WEIGHT(A, B, out, tmp) \
+   *(out) = ((A + B + ((A ^ B) & 0x821)) >> 1)
+
+/* Upscales a 240x160 image to 320x240 using an approximate bilinear
+ * resampling algorithm that only uses integer math */
+void upscale_240x160_to_320x240(uint16_t *dst, const uint16_t *src,
+      uint16_t dst_stride, uint16_t src_stride)
+{
+   /* There are 80 blocks of 3 pixels horizontally,
+    * and 80 blocks of 2 pixels vertically
+    * Each block of 3x2 becomes 4x3 */
+   uint32_t block_x;
+   uint32_t block_y;
+
+   for (block_y = 0; block_y < 80; block_y++) 
+   { 
+      const uint16_t *block_src = src + block_y * src_stride * 2;
+      uint16_t *block_dst       = dst + block_y * dst_stride * 3;
+
+      for (block_x = 0; block_x < 80; block_x++)
+      {
+         const uint16_t *block_src_ptr = block_src;
+         uint16_t *block_dst_ptr       = block_dst;
+
+         uint16_t _1, _2, _3,
+                  _4, _5, _6;
+
+         uint16_t _1_2;
+         uint16_t _2_3;
+         uint16_t _4_5;
+         uint16_t _5_6;
+
+         uint16_t tmp;
+
+         /* Horizontally:
+          * Before(3):
+          * (a)(b)(c)
+          * After(4):
+          * (a)(ab)(bc)(c)
+          *
+          * Vertically:
+          * Before(2): After(3):
+          * (a)        (a)
+          * (b)        (ab)
+          *            (b)
+          */
+
+         /* -- Row 1 -- */
+         _1 = *(block_src_ptr    );
+         _2 = *(block_src_ptr + 1);
+         _3 = *(block_src_ptr + 2);
+
+         *(block_dst_ptr    ) = _1;
+         UPSCALE_240__WEIGHT(_1, _2, &_1_2, tmp);
+         *(block_dst_ptr + 1) = _1_2;
+         UPSCALE_240__WEIGHT(_2, _3, &_2_3, tmp);
+         *(block_dst_ptr + 2) = _2_3;
+         *(block_dst_ptr + 3) = _3;
+
+         block_src_ptr += src_stride;
+         block_dst_ptr += dst_stride;
+
+         /* -- Row 2 -- */
+         _4 = *(block_src_ptr    );
+         _5 = *(block_src_ptr + 1);
+         _6 = *(block_src_ptr + 2);
+
+         UPSCALE_240__WEIGHT(_1, _4, block_dst_ptr, tmp);
+         UPSCALE_240__WEIGHT(_4, _5, &_4_5, tmp);
+         UPSCALE_240__WEIGHT(_1_2, _4_5, block_dst_ptr + 1, tmp);
+         UPSCALE_240__WEIGHT(_5, _6, &_5_6, tmp);
+         UPSCALE_240__WEIGHT(_2_3, _5_6, block_dst_ptr + 2, tmp);
+         UPSCALE_240__WEIGHT(_3, _6, block_dst_ptr + 3, tmp);
+
+         block_src_ptr += src_stride;
+         block_dst_ptr += dst_stride;
+
+         /* -- Row 3 -- */
+         *(block_dst_ptr    ) = _4;
+         UPSCALE_240__WEIGHT(_4, _5, block_dst_ptr + 1, tmp);
+         UPSCALE_240__WEIGHT(_5, _6, block_dst_ptr + 2, tmp);
+         *(block_dst_ptr + 3) = _6;
+
+         block_src += 3;
+         block_dst += 4;
+      }
+   }
+}
+
+/* Upscales a 240x160 image to 320x213 (padding the result
+ * to 320x240 via letterboxing) using an approximate bilinear
+ * resampling algorithm that only uses integer math */
+void upscale_240x160_to_320x240_aspect(uint16_t *dst, const uint16_t *src,
+      uint16_t dst_stride, uint16_t src_stride)
+{  
+   /* There are 80 blocks of 3 pixels horizontally,
+    * and 53 blocks of 3 pixels vertically
+    * Each block of 3x3 becomes 4x4 */
+   uint32_t block_x;
+   uint32_t block_y;
+   const uint16_t *block_src = NULL;
+   uint16_t *block_dst       = NULL;
+
+   /* Letterboxing - zero out first 13 rows */
+   memset(dst, 0, sizeof(uint16_t) * dst_stride * 13);
+
+   /* Scale blocks from 3x3 to 4x4 */
+   for (block_y = 0; block_y < 53; block_y++) 
+   { 
+      block_src = src + block_y * src_stride * 3;
+      block_dst = (dst + (13 * dst_stride)) + block_y * dst_stride * 4;
+
+      for (block_x = 0; block_x < 80; block_x++)
+      {
+         const uint16_t *block_src_ptr = block_src;
+         uint16_t *block_dst_ptr       = block_dst;
+
+         uint16_t _1, _2, _3,
+                  _4, _5, _6,
+                  _7, _8, _9;
+
+         uint16_t _1_2;
+         uint16_t _2_3;
+         uint16_t _4_5;
+         uint16_t _5_6;
+         uint16_t _7_8;
+         uint16_t _8_9;
+
+         uint16_t tmp;
+
+         /* Horizontally:
+          * Before(3):
+          * (a)(b)(c)
+          * After(4):
+          * (a)(ab)(bc)(c)
+          *
+          * Vertically:
+          * Before(2): After(3):
+          * (a)        (a)
+          * (b)        (ab)
+          * (c)        (bc)
+          *            (c)
+          */
+
+         /* -- Row 1 -- */
+         _1 = *(block_src_ptr    );
+         _2 = *(block_src_ptr + 1);
+         _3 = *(block_src_ptr + 2);
+
+         *(block_dst_ptr    ) = _1;
+         UPSCALE_240__WEIGHT(_1, _2, &_1_2, tmp);
+         *(block_dst_ptr + 1) = _1_2;
+         UPSCALE_240__WEIGHT(_2, _3, &_2_3, tmp);
+         *(block_dst_ptr + 2) = _2_3;
+         *(block_dst_ptr + 3) = _3;
+
+         block_src_ptr += src_stride;
+         block_dst_ptr += dst_stride;
+
+         /* -- Row 2 -- */
+         _4 = *(block_src_ptr    );
+         _5 = *(block_src_ptr + 1);
+         _6 = *(block_src_ptr + 2);
+
+         UPSCALE_240__WEIGHT(_1, _4, block_dst_ptr, tmp);
+         UPSCALE_240__WEIGHT(_4, _5, &_4_5, tmp);
+         UPSCALE_240__WEIGHT(_1_2, _4_5, block_dst_ptr + 1, tmp);
+         UPSCALE_240__WEIGHT(_5, _6, &_5_6, tmp);
+         UPSCALE_240__WEIGHT(_2_3, _5_6, block_dst_ptr + 2, tmp);
+         UPSCALE_240__WEIGHT(_3, _6, block_dst_ptr + 3, tmp);
+
+         block_src_ptr += src_stride;
+         block_dst_ptr += dst_stride;
+
+         /* -- Row 3 -- */
+         _7 = *(block_src_ptr    );
+         _8 = *(block_src_ptr + 1);
+         _9 = *(block_src_ptr + 2);
+
+         UPSCALE_240__WEIGHT(_4, _7, block_dst_ptr, tmp);
+         UPSCALE_240__WEIGHT(_7, _8, &_7_8, tmp);
+         UPSCALE_240__WEIGHT(_4_5, _7_8, block_dst_ptr + 1, tmp);
+         UPSCALE_240__WEIGHT(_8, _9, &_8_9, tmp);
+         UPSCALE_240__WEIGHT(_5_6, _8_9, block_dst_ptr + 2, tmp);
+         UPSCALE_240__WEIGHT(_6, _9, block_dst_ptr + 3, tmp);
+
+         block_src_ptr += src_stride;
+         block_dst_ptr += dst_stride;
+
+         /* -- Row 4 -- */
+         *(block_dst_ptr    ) = _7;
+         *(block_dst_ptr + 1) = _7_8;
+         *(block_dst_ptr + 2) = _8_9;
+         *(block_dst_ptr + 3) = _9;
+
+         block_src += 3;
+         block_dst += 4;
+      }
+   }
+
+   /* Above scaling excludes the last row of the
+    * source image. Handle this separately. */
+   block_src = src + (src_stride * 159);
+   block_dst = dst + (225 * dst_stride);
+
+   for (block_x = 0; block_x < 80; block_x++)
+   {
+      const uint16_t *block_src_ptr = block_src;
+      uint16_t *block_dst_ptr       = block_dst;
+
+      uint16_t _1, _2, _3;
+      uint16_t tmp;
+
+      /* Horizontally:
+       * Before(3):
+       * (a)(b)(c)
+       * After(4):
+       * (a)(ab)(bc)(c)
+       */
+
+      /* -- Row 1 -- */
+      _1 = *(block_src_ptr    );
+      _2 = *(block_src_ptr + 1);
+      _3 = *(block_src_ptr + 2);
+
+      *(block_dst_ptr    ) = _1;
+      UPSCALE_240__WEIGHT(_1, _2, block_dst_ptr + 1, tmp);
+      UPSCALE_240__WEIGHT(_2, _3, block_dst_ptr + 2, tmp);
+      *(block_dst_ptr + 3) = _3;
+
+      block_src += 3;
+      block_dst += 4;
+   }
+
+   /* Letterboxing - zero out last 14 rows */
+   memset(dst + (226 * dst_stride), 0, sizeof(uint16_t) * dst_stride * 14);
+}
+
+/*******************************************************************
+ *******************************************************************/
+
+static unsigned upscale_240x160_320x240_generic_input_fmts(void)
+{
+   return SOFTFILTER_FMT_RGB565;
+}
+
+static unsigned upscale_240x160_320x240_generic_output_fmts(unsigned input_fmts)
+{
+   return input_fmts;
+}
+
+static unsigned upscale_240x160_320x240_generic_threads(void *data)
+{
+   struct filter_data *filt = (struct filter_data*)data;
+   return filt->threads;
+}
+
+static void upscale_240x160_320x240_initialize(struct filter_data *filt,
+      const struct softfilter_config *config,
+      void *userdata)
+{
+   int keep_aspect = 1;
+
+   /* Assign default scaling functions */
+   filt->function.upscale_240x160_320x240 = upscale_240x160_to_320x240_aspect;
+
+   /* Read aspect ratio correction setting */
+   if (config->get_int(userdata, "keep_aspect", &keep_aspect, 1) &&
+       !keep_aspect)
+      filt->function.upscale_240x160_320x240 = upscale_240x160_to_320x240;
+}
+
+static void *upscale_240x160_320x240_generic_create(const struct softfilter_config *config,
+      unsigned in_fmt, unsigned out_fmt,
+      unsigned max_width, unsigned max_height,
+      unsigned threads, softfilter_simd_mask_t simd, void *userdata)
+{
+   struct filter_data *filt = (struct filter_data*)calloc(1, sizeof(*filt));
+   (void)simd;
+   (void)config;
+   (void)userdata;
+
+   if (!filt) {
+      return NULL;
+   }
+   /* Apparently the code is not thread-safe,
+    * so force single threaded operation... */
+   filt->workers = (struct softfilter_thread_data*)calloc(1, sizeof(struct softfilter_thread_data));
+   filt->threads = 1;
+   filt->in_fmt  = in_fmt;
+   if (!filt->workers) {
+      free(filt);
+      return NULL;
+   }
+
+   /* Assign scaling functions */
+   upscale_240x160_320x240_initialize(filt, config, userdata);
+
+   return filt;
+}
+
+static void upscale_240x160_320x240_generic_output(void *data,
+      unsigned *out_width, unsigned *out_height,
+      unsigned width, unsigned height)
+{
+   if ((width == 240) && (height == 160))
+   {
+      *out_width  = 320;
+      *out_height = 240;
+   }
+   else
+   {
+      *out_width  = width;
+      *out_height = height;
+   }
+}
+
+static void upscale_240x160_320x240_generic_destroy(void *data)
+{
+   struct filter_data *filt = (struct filter_data*)data;
+   if (!filt) {
+      return;
+   }
+   free(filt->workers);
+   free(filt);
+}
+
+static void upscale_240x160_320x240_work_cb_rgb565(void *data, void *thread_data)
+{
+   struct filter_data *filt           = (struct filter_data*)data;   
+   struct softfilter_thread_data *thr = (struct softfilter_thread_data*)thread_data;
+   const uint16_t *input              = (const uint16_t*)thr->in_data;
+   uint16_t *output                   = (uint16_t*)thr->out_data;
+   uint16_t in_stride                 = (uint16_t)(thr->in_pitch >> 1);
+   uint16_t out_stride                = (uint16_t)(thr->out_pitch >> 1);
+   unsigned width                     = thr->width;
+   unsigned height                    = thr->height;
+
+   if ((width == 240) && (height == 160))
+   {
+      filt->function.upscale_240x160_320x240(output, input, out_stride, in_stride);
+      return;
+   }
+
+   /* Input buffer is of dimensions that cannot be upscaled
+    * > Simply copy input to output */
+
+   /* If source and destination buffers have the
+    * same pitch, perform fast copy of raw pixel data */
+   if (in_stride == out_stride)
+      memcpy(output, input, thr->out_pitch * height);
+   else
+   {
+      /* Otherwise copy pixel data line-by-line */
+      unsigned y;
+      for (y = 0; y < height; y++)
+      {
+         memcpy(output, input, width * sizeof(uint16_t));
+         input  += in_stride;
+         output += out_stride;
+      }
+   }
+}
+
+static void upscale_240x160_320x240_generic_packets(void *data,
+      struct softfilter_work_packet *packets,
+      void *output, size_t output_stride,
+      const void *input, unsigned width, unsigned height, size_t input_stride)
+{
+   /* We are guaranteed single threaded operation
+    * (filt->threads = 1) so we don't need to loop
+    * over threads and can cull some code. This only
+    * makes the tiniest performance difference, but
+    * every little helps when running on an o3DS... */
+   struct filter_data *filt = (struct filter_data*)data;
+   struct softfilter_thread_data *thr = (struct softfilter_thread_data*)&filt->workers[0];
+
+   thr->out_data = (uint8_t*)output;
+   thr->in_data = (const uint8_t*)input;
+   thr->out_pitch = output_stride;
+   thr->in_pitch = input_stride;
+   thr->width = width;
+   thr->height = height;
+
+   if (filt->in_fmt == SOFTFILTER_FMT_RGB565) {
+      packets[0].work = upscale_240x160_320x240_work_cb_rgb565;
+   }
+   packets[0].thread_data = thr;
+}
+
+static const struct softfilter_implementation upscale_240x160_320x240_generic = {
+   upscale_240x160_320x240_generic_input_fmts,
+   upscale_240x160_320x240_generic_output_fmts,
+
+   upscale_240x160_320x240_generic_create,
+   upscale_240x160_320x240_generic_destroy,
+
+   upscale_240x160_320x240_generic_threads,
+   upscale_240x160_320x240_generic_output,
+   upscale_240x160_320x240_generic_packets,
+
+   SOFTFILTER_API_VERSION,
+   "Upscale_240x160-320x240",
+   "upscale_240x160_320x240",
+};
+
+const struct softfilter_implementation *softfilter_get_implementation(
+      softfilter_simd_mask_t simd)
+{
+   (void)simd;
+   return &upscale_240x160_320x240_generic;
+}
+
+#ifdef RARCH_INTERNAL
+#undef softfilter_get_implementation
+#undef softfilter_thread_data
+#undef filter_data
+#endif

griffin/griffin.c

@@ -1043,6 +1043,7 @@ FILTERS
 #include "../gfx/video_filters/upscale_1_5x.c"
 #include "../gfx/video_filters/upscale_256x_320x240.c"
 #include "../gfx/video_filters/picoscale_256x_320x240.c"
+#include "../gfx/video_filters/upscale_240x160_320x240.c"
 #endif
 
 #ifdef HAVE_DSP_FILTER