lavc/av1: Add unit test for level handling

Signed-off-by: Fei Wang <fei.w.wang@intel.com>
Reviewed-by: Neal Gompa <ngompa13@gmail.com>

libavcodec/tests/.gitignore

@@ -1,3 +1,4 @@
+/av1_levels
 /avcodec
 /avfft
 /avpacket

libavcodec/tests/av1_levels.c

@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2023 Intel Corporation
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stddef.h>
+#include <inttypes.h>
+#include "libavutil/log.h"
+#include "libavcodec/av1_levels.h"
+
+static const struct {
+    int width;
+    int height;
+    float framerate;
+    int level_idx;
+} test_sizes[] = {
+    {  426,  240,  30.0,  0 },
+    {  640,  360,  30.0,  1 },
+    {  854,  480,  30.0,  4 },
+    { 1280,  720,  30.0,  5 },
+    { 1920, 1080,  30.0,  8 },
+    { 1920, 1080,  60.0,  9 },
+    { 3840, 2160,  30.0, 12 },
+    { 3840, 2160,  60.0, 13 },
+    { 3840, 2160, 120.0, 14 },
+    { 7680, 4320,  30.0, 16 },
+    { 7680, 4320,  60.0, 17 },
+    { 7680, 4320, 120.0, 18 },
+};
+
+static const struct {
+    int64_t bitrate;
+    int tier;
+    int level_idx;
+} test_bitrate[] = {
+    {   1500000, 0,  0 },
+    {   3000000, 0,  1 },
+    {   6000000, 0,  4 },
+    {  10000000, 0,  5 },
+    {  12000000, 0,  8 },
+    {  30000000, 1,  8 },
+    {  20000000, 0,  9 },
+    {  50000000, 1,  9 },
+    {  30000000, 0, 12 },
+    { 100000000, 1, 12 },
+    {  40000000, 0, 13 },
+    { 160000000, 1, 13 },
+    {  60000000, 0, 14 },
+    { 240000000, 1, 14 },
+    { 100000000, 0, 17 },
+    { 480000000, 1, 17 },
+    { 160000000, 0, 18 },
+    { 800000000, 1, 18 },
+};
+
+static const struct {
+    int tiles;
+    int tile_cols;
+    int level_idx;
+} test_tiles[] = {
+    {    8,  4,  0 },
+    {   16,  6,  4 },
+    {   32,  8,  8 },
+    {   64,  8, 12 },
+    {  128, 16, 16 },
+};
+
+int main(void)
+{
+    const AV1LevelDescriptor *level;
+    int i;
+
+#define CHECK(expected, format, ...) do { \
+        if (level ? (level->level_idx != expected) \
+                     : !level) { \
+            av_log(NULL, AV_LOG_ERROR, "Incorrect level for " \
+                   format ": expected %d, got %d.\n", __VA_ARGS__, \
+                   expected, level ? level->level_idx : -1); \
+            return 1; \
+        } \
+    } while (0)
+
+    for (i = 0; i < FF_ARRAY_ELEMS(test_sizes); i++) {
+        level = ff_av1_guess_level(0, 0,
+                                   test_sizes[i].width,
+                                   test_sizes[i].height,
+                                   0, 0, test_sizes[i].framerate);
+        CHECK(test_sizes[i].level_idx, "size %dx%d, framerate %f",
+              test_sizes[i].width, test_sizes[i].height, test_sizes[i].framerate);
+    }
+
+    for (i = 0; i < FF_ARRAY_ELEMS(test_bitrate); i++) {
+        level = ff_av1_guess_level(test_bitrate[i].bitrate,
+                                   test_bitrate[i].tier,
+                                   0, 0, 0, 0, 0);
+        CHECK(test_bitrate[i].level_idx, "bitrate %"PRId64" tier %d",
+              test_bitrate[i].bitrate, test_bitrate[i].tier);
+    }
+
+    for (i = 0; i < FF_ARRAY_ELEMS(test_tiles); i++) {
+        level = ff_av1_guess_level(0, 0, 0, 0,
+                                   test_tiles[i].tiles,
+                                   test_tiles[i].tile_cols,
+                                   0);
+        CHECK(test_tiles[i].level_idx, "tiles %d, tile cols %d",
+              test_tiles[i].tiles,
+              test_tiles[i].tile_cols);
+    }
+
+    return 0;
+}

tests/fate/libavcodec.mak

@@ -1,3 +1,8 @@
+FATE_LIBAVCODEC-$(CONFIG_AV1_VAAPI_ENCODER) += fate-av1-levels
+fate-av1-levels: libavcodec/tests/av1_levels$(EXESUF)
+fate-av1-levels: CMD = run libavcodec/tests/av1_levels$(EXESUF)
+fate-av1-levels: REF = /dev/null
+
 FATE_LIBAVCODEC-yes += fate-avpacket
 fate-avpacket: libavcodec/tests/avpacket$(EXESUF)
 fate-avpacket: CMD = run libavcodec/tests/avpacket$(EXESUF)