change ratio to 1..2 from 1..4

Signed-off-by: Liang <[email protected]>

Author: xiaoxial

README.md

@@ -68,7 +68,7 @@ ffmpeg -init_hw_device vaapi=va -init_hw_device opencl=ocl@va -hwaccel vaapi -hw
 `./ffmpeg -h filter=raisr`
 
     raisr AVOptions:
-      ratio             <float>      ..FV....... ratio of the upscaling, between 1 and 4 (from 1 to 4) (default 2)
+      ratio             <float>      ..FV....... ratio of the upscaling, between 1 and 2 (default 2)
       bits              <int>        ..FV....... bit depth (from 8 to 10) (default 8)
       range             <string>     ..FV....... color range of the input. If you are working with images, you may want to set range to full (video/full) (default video)
       threadcount       <int>        ..FV....... thread count (from 1 to 120) (default 20)

ffmpeg/vf_raisr.c

@@ -38,7 +38,7 @@
 #include <unistd.h>
 
 #define MIN_RATIO 1
-#define MAX_RATIO 4
+#define MAX_RATIO 2
 #define DEFAULT_RATIO 2
 
 #define MIN_THREADCOUNT 1
@@ -78,7 +78,7 @@ typedef struct RaisrContext
 #define OFFSET(x) offsetof(RaisrContext, x)
 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
 static const AVOption raisr_options[] = {
-    {"ratio", "ratio of the upscaling, between 1 and 4", OFFSET(ratio), AV_OPT_TYPE_FLOAT, {.dbl = DEFAULT_RATIO}, MIN_RATIO, MAX_RATIO, FLAGS},
+    {"ratio", "ratio of the upscaling, between 1 and 2", OFFSET(ratio), AV_OPT_TYPE_FLOAT, {.dbl = DEFAULT_RATIO}, MIN_RATIO, MAX_RATIO, FLAGS},
     {"bits", "bit depth", OFFSET(bits), AV_OPT_TYPE_INT, {.i64 = 8}, 8, 10, FLAGS},
     {"range", "input color range", OFFSET(range), AV_OPT_TYPE_STRING, {.str = "video"}, 0, 0, FLAGS},
     {"threadcount", "thread count", OFFSET(threadcount), AV_OPT_TYPE_INT, {.i64 = DEFAULT_THREADCOUNT}, MIN_THREADCOUNT, MAX_THREADCOUNT, FLAGS},

ffmpeg/vf_raisr_opencl.c

@@ -27,7 +27,7 @@
 #include "libavutil/pixdesc.h"
 
 #define MIN_RATIO 1
-#define MAX_RATIO 4
+#define MAX_RATIO 2
 #define DEFAULT_RATIO 2
 
 typedef struct RaisrOpenCLContext {
@@ -212,7 +212,7 @@ static av_cold void raisr_opencl_uninit(AVFilterContext *avctx)
 #define OFFSET(x) offsetof(RaisrOpenCLContext, x)
 #define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
 static const AVOption raisr_opencl_options[] = {
-    {"ratio", "ratio (currently only ratio of 2 is supported)", OFFSET(ratio),
+    {"ratio", "ratio of the upscaling, between 1 and 2", OFFSET(ratio),
 	 AV_OPT_TYPE_FLOAT, {.dbl = DEFAULT_RATIO}, MIN_RATIO, MAX_RATIO, FLAGS},
     {"bits", "bit depth", OFFSET(bits), AV_OPT_TYPE_INT, {.i64 = 8}, 8, 10, FLAGS},
     {"range", "input color range", OFFSET(range), AV_OPT_TYPE_INT, {.i64 = VideoRange}, VideoRange, FullRange, FLAGS, "range"},