lsws/input: add NV15 and NV20 formats support

Signed-off-by: nyanmisaka <nst799610810@gmail.com>

libswscale/input.c

@@ -793,6 +793,39 @@ static void nv21ToUV_c(uint8_t *dstU, uint8_t *dstV,
     nvXXtoUV_c(dstV, dstU, src1, width);
 }
 
+static av_always_inline void nv15_20ToYUV_c(uint16_t *dst, const uint8_t *src,
+                                            int dst_pos, int src_pos)
+{
+    int shift = (src_pos << 1) & 7;
+    src_pos = (src_pos * 10) >> 3;
+    AV_WN16(dst + dst_pos,
+            ((AV_RL16(src + src_pos) >> shift) |
+             (AV_RL16(src + src_pos + 1) << (8 - shift))) & 0x3FF);
+}
+
+static void nv15_20ToY_c(uint8_t *_dst, const uint8_t *_src, const uint8_t *unused1,
+                         const uint8_t *unused2, int width, uint32_t *unused, void *opq)
+{
+    int i;
+    const uint8_t *src = (const uint8_t *)_src;
+    uint16_t *dst      = (uint16_t *)_dst;
+    for (i = 0; i < width; i++)
+        nv15_20ToYUV_c(dst, src, i, i);
+}
+
+static void nv15_20ToUV_c(uint8_t *_dstU, uint8_t *_dstV,
+                          const uint8_t *unused0, const uint8_t *_src1, const uint8_t *_src2,
+                          int width, uint32_t *unused, void *opq)
+{
+    int i;
+    const uint8_t *src1 = (const uint8_t *)_src1;
+    uint16_t *dstU      = (uint16_t *)_dstU, *dstV = (uint16_t *)_dstV;
+    for (i = 0; i < width; i++) {
+        nv15_20ToYUV_c(dstU, src1, i, 2 * i);
+        nv15_20ToYUV_c(dstV, src1, i, 2 * i + 1);
+    }
+}
+
 #define p01x_uv_wrapper(bits, shift) \
     static void p0 ## bits ## LEToUV_c(uint8_t *dstU, uint8_t *dstV,     \
                                        const uint8_t *unused0,           \
@@ -1444,6 +1477,10 @@ av_cold void ff_sws_init_input_funcs(SwsContext *c)
     case AV_PIX_FMT_XV36LE:
         c->chrToYV12 = read_xv36le_UV_c;
         break;
+    case AV_PIX_FMT_NV15:
+    case AV_PIX_FMT_NV20:
+        c->chrToYV12 = nv15_20ToUV_c;
+        break;
     case AV_PIX_FMT_P010LE:
     case AV_PIX_FMT_P210LE:
     case AV_PIX_FMT_P410LE:
@@ -1944,6 +1981,10 @@ av_cold void ff_sws_init_input_funcs(SwsContext *c)
     case AV_PIX_FMT_BGRA64LE:
         c->lumToYV12 = bgr64LEToY_c;
         break;
+    case AV_PIX_FMT_NV15:
+    case AV_PIX_FMT_NV20:
+        c->lumToYV12 = nv15_20ToY_c;
+        break;
     case AV_PIX_FMT_P010LE:
     case AV_PIX_FMT_P210LE:
     case AV_PIX_FMT_P410LE:

libswscale/utils.c

@@ -230,6 +230,8 @@ static const FormatEntry format_entries[] = {
     [AV_PIX_FMT_XYZ12BE]     = { 1, 1, 1 },
     [AV_PIX_FMT_XYZ12LE]     = { 1, 1, 1 },
     [AV_PIX_FMT_AYUV64LE]    = { 1, 1},
+    [AV_PIX_FMT_NV15]        = { 1, 0 },
+    [AV_PIX_FMT_NV20]        = { 1, 0 },
     [AV_PIX_FMT_P010LE]      = { 1, 1 },
     [AV_PIX_FMT_P010BE]      = { 1, 1 },
     [AV_PIX_FMT_P012LE]      = { 1, 1 },

tests/ref/fate/imgutils

@@ -268,3 +268,4 @@ p412be          planes: 2, linesizes: 128 256   0   0, plane_sizes:  6144 12288
 p412le          planes: 2, linesizes: 128 256   0   0, plane_sizes:  6144 12288     0     0, plane_offsets:  6144     0     0, total_size: 18432
 gbrap14be       planes: 4, linesizes: 128 128 128 128, plane_sizes:  6144  6144  6144  6144, plane_offsets:  6144  6144  6144, total_size: 24576
 gbrap14le       planes: 4, linesizes: 128 128 128 128, plane_sizes:  6144  6144  6144  6144, plane_offsets:  6144  6144  6144, total_size: 24576
+nv15            planes: 2, linesizes:  80  80   0   0, plane_sizes:  3840  1920     0     0, plane_offsets:  3840     0     0, total_size: 5760

tests/ref/fate/sws-pixdesc-query

@@ -61,6 +61,7 @@ isNBPS:
   gray14le
   gray9be
   gray9le
+  nv15
   nv20be
   nv20le
   p010be
@@ -221,6 +222,7 @@ isYUV:
   ayuv64be
   ayuv64le
   nv12
+  nv15
   nv16
   nv20be
   nv20le
@@ -337,6 +339,7 @@ isYUV:
 
 isPlanarYUV:
   nv12
+  nv15
   nv16
   nv20be
   nv20le
@@ -434,6 +437,7 @@ isPlanarYUV:
 
 isSemiPlanarYUV:
   nv12
+  nv15
   nv16
   nv20be
   nv20le
@@ -868,6 +872,7 @@ Planar:
   gbrpf32be
   gbrpf32le
   nv12
+  nv15
   nv16
   nv20be
   nv20le