vsmigx: allow fp16 input & output (#86)

vsmigx/vs_migraphx.cpp

@@ -63,6 +63,7 @@ static void setDimensions(
     std::unique_ptr<VSVideoInfo> & vi,
     const std::array<int, 4> & input_shape,
     const std::array<int, 4> & output_shape,
+    int bitsPerSample,
     VSCore * core,
     const VSAPI * vsapi
 ) noexcept {
@@ -71,9 +72,9 @@ static void setDimensions(
     vi->width *= output_shape[3] / input_shape[3];
 
     if (output_shape[1] == 1) {
-        vi->format = vsapi->registerFormat(cmGray, stFloat, 32, 0, 0, core);
+        vi->format = vsapi->registerFormat(cmGray, stFloat, bitsPerSample, 0, 0, core);
     } else if (output_shape[1] == 3) {
-        vi->format = vsapi->registerFormat(cmRGB, stFloat, 32, 0, 0, core);
+        vi->format = vsapi->registerFormat(cmRGB, stFloat, bitsPerSample, 0, 0, core);
     }
 }
 
@@ -723,8 +724,8 @@ static void VS_CC vsMIGXCreate(
         }
         migraphx_shape_datatype_t type;
         checkError(migraphx_shape_type(&type, input_shape));
-        if (type != migraphx_shape_float_type) {
-            return set_error("input type must be float");
+        if (type != migraphx_shape_float_type && type != migraphx_shape_half_type) {
+            return set_error("input type must be float or half");
         }
         const size_t * lengths;
         size_t ndim;
@@ -769,6 +770,7 @@ static void VS_CC vsMIGXCreate(
 
     size_t output_size;
     const_migraphx_shape_t output_shape;
+    int bitsPerSample;
     {
         migraphx_shapes_t output_shapes;
         checkError(migraphx_program_get_output_shapes(&output_shapes, d->program));
@@ -786,9 +788,10 @@ static void VS_CC vsMIGXCreate(
         }
         migraphx_shape_datatype_t type;
         checkError(migraphx_shape_type(&type, output_shape));
-        if (type != migraphx_shape_float_type) {
-            return set_error("output type must be float");
+        if (type != migraphx_shape_float_type && type != migraphx_shape_half_type) {
+            return set_error("output type must be float or half");
         }
+        bitsPerSample = type == migraphx_shape_float_type ? 32 : 16;
         const size_t * lengths;
         size_t ndim;
         checkError(migraphx_shape_lengths(&lengths, &ndim, output_shape));
@@ -838,7 +841,7 @@ static void VS_CC vsMIGXCreate(
         return set_error("\"num_streams\" must be 1 for now");
     }
 
-    setDimensions(d->out_vi, d->src_tile_shape, d->dst_tile_shape, core, vsapi);
+    setDimensions(d->out_vi, d->src_tile_shape, d->dst_tile_shape, bitsPerSample, core, vsapi);
 
     // per-stream context
     d->instances.reserve(num_streams);