From ac3e355f90694d5e5c07ca05199bec7ead9a5eee Mon Sep 17 00:00:00 2001
From: Kleis Auke Wolthuizen <github@kleisauke.nl>
Date: Tue, 22 Dec 2020 15:25:55 +0100
Subject: [PATCH] Add AVIF encoding support (#238)

---
 src/api/enums.h                               |   1 +
 src/api/parsers/enumeration.h                 |   2 +
 src/api/processors/stream.cpp                 |  26 +++++++
 src/api/utils/utility.h                       |   7 +-
 src/nginx/util.cpp                            |   2 +
 test/api/fixtures.h                           |   3 +
 ...frame12924_yuv420_10bpc_bt2020_pq_q50.avif | Bin 0 -> 17264 bytes
 test/api/processors/unit-stream.cpp           |  69 +++++++++++++++++-
 valgrind.suppress => test/valgrind.suppress   |   0
 9 files changed, 108 insertions(+), 2 deletions(-)
 create mode 100644 test/api/fixtures/cosmos_frame12924_yuv420_10bpc_bt2020_pq_q50.avif
 rename valgrind.suppress => test/valgrind.suppress (100%)

diff --git a/src/api/enums.h b/src/api/enums.h
index 6008eea5..f1e0d7d4 100644
--- a/src/api/enums.h
+++ b/src/api/enums.h
@@ -61,6 +61,7 @@ enum class Output {
     Jpeg,
     Png,
     Webp,
+    Avif,
     Tiff,
     Gif,
     Json
diff --git a/src/api/parsers/enumeration.h b/src/api/parsers/enumeration.h
index a0567742..2c987fc3 100644
--- a/src/api/parsers/enumeration.h
+++ b/src/api/parsers/enumeration.h
@@ -105,6 +105,8 @@ inline enums::Output parse(const std::string &value) {
         return enums::Output::Tiff;
     } else if (value == "webp") {
         return enums::Output::Webp;
+    } else if (value == "avif" || value == "av1") {
+        return enums::Output::Avif;
     } else if (value == "json") {
         return enums::Output::Json;
     } else /*if (value == "origin")*/ {
diff --git a/src/api/processors/stream.cpp b/src/api/processors/stream.cpp
index 47ac1430..b29ac335 100644
--- a/src/api/processors/stream.cpp
+++ b/src/api/processors/stream.cpp
@@ -342,6 +342,29 @@ void Stream::append_save_options<Output::Webp>(vips::VOption *options) const {
     options->set("alpha_q", 100);
 }
 
+template <>
+void Stream::append_save_options<Output::Avif>(vips::VOption *options) const {
+    auto quality = query_->get_if<int>(
+        "q",
+        [](int q) {
+            // Quality needs to be in the range
+            // of 1 - 100
+            return q >= 1 && q <= 100;
+        },
+        static_cast<int>(config_.default_quality));
+
+    // Set quality (default is 85)
+    options->set("Q", quality);
+
+    // Set compression format to AV1
+    options->set("compression", VIPS_FOREIGN_HEIF_COMPRESSION_AV1);
+
+#if VIPS_VERSION_AT_LEAST(8, 10, 2)
+    // Control the CPU effort spent on improving compression
+    options->set("speed", 6);
+#endif
+}
+
 template <>
 void Stream::append_save_options<Output::Tiff>(vips::VOption *options) const {
     auto quality = query_->get_if<int>(
@@ -375,6 +398,9 @@ void Stream::append_save_options(const Output &output,
         case Output::Webp:
             append_save_options<Output::Webp>(options);
             break;
+        case Output::Avif:
+            append_save_options<Output::Avif>(options);
+            break;
         case Output::Tiff:
             append_save_options<Output::Tiff>(options);
             break;
diff --git a/src/api/utils/utility.h b/src/api/utils/utility.h
index 5f56eb67..65c2cd5e 100644
--- a/src/api/utils/utility.h
+++ b/src/api/utils/utility.h
@@ -155,6 +155,8 @@ inline std::string determine_image_extension(const Output &output) {
             return ".jpg";
         case Output::Webp:
             return ".webp";
+        case Output::Avif:
+            return ".avif";
         case Output::Tiff:
             return ".tiff";
         case Output::Gif:
@@ -176,6 +178,8 @@ inline Output to_output(const ImageType &image_type) {
             return Output::Jpeg;
         case ImageType::Webp:
             return Output::Webp;
+        case ImageType::Heif:
+            return Output::Avif;
         case ImageType::Tiff:
             return Output::Tiff;
         case ImageType::Gif:
@@ -269,7 +273,8 @@ inline std::string image_type_id(const ImageType &image_type) {
  */
 inline bool support_alpha_channel(const ImageType &image_type) {
     return image_type == ImageType::Png || image_type == ImageType::Webp ||
-           image_type == ImageType::Tiff || image_type == ImageType::Gif;
+           image_type == ImageType::Heif || image_type == ImageType::Tiff ||
+           image_type == ImageType::Gif;
 }
 
 /**
diff --git a/src/nginx/util.cpp b/src/nginx/util.cpp
index 97dbf84a..f2075804 100644
--- a/src/nginx/util.cpp
+++ b/src/nginx/util.cpp
@@ -109,6 +109,8 @@ ngx_str_t extension_to_mime_type(const std::string &extension) {
         return ngx_string("image/png");
     } else if (extension == ".webp") {
         return ngx_string("image/webp");
+    } else if (extension == ".avif") {
+        return ngx_string("image/avif");
     } else if (extension == ".tiff") {
         return ngx_string("image/tiff");
     } else if (extension == ".gif") {
diff --git a/test/api/fixtures.h b/test/api/fixtures.h
index 701484c1..585b0a65 100644
--- a/test/api/fixtures.h
+++ b/test/api/fixtures.h
@@ -142,4 +142,7 @@ struct Fixtures {
 
     // http://www.anyhere.com/gward/pixformat/images/84y2.tif
     std::string input_hdr{dir + "/84y2.hdr"};
+
+    // CC by-nc-nd https://github.com/AOMediaCodec/av1-avif/tree/master/testFiles/Netflix
+    std::string input_avif{dir + "/cosmos_frame12924_yuv420_10bpc_bt2020_pq_q50.avif"};
 };
diff --git a/test/api/fixtures/cosmos_frame12924_yuv420_10bpc_bt2020_pq_q50.avif b/test/api/fixtures/cosmos_frame12924_yuv420_10bpc_bt2020_pq_q50.avif
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/test/api/processors/unit-stream.cpp b/test/api/processors/unit-stream.cpp
index b4681507..2994646d 100644
--- a/test/api/processors/unit-stream.cpp
+++ b/test/api/processors/unit-stream.cpp
@@ -46,6 +46,33 @@ TEST_CASE("output", "[stream]") {
         CHECK(image.height() == 300);
     }
 
+    SECTION("avif") {
+        if (vips_type_find("VipsOperation",
+                           pre_8_11 ? "heifload_buffer" : "heifload_source") ==
+                0 ||
+            vips_type_find("VipsOperation",
+                           pre_8_11 ? "heifsave_buffer" : "heifsave_target") ==
+                0) {
+            SUCCEED("no avif support, skipping test");
+            return;
+        }
+
+        auto test_image = fixtures->input_avif;
+        auto params = "w=300&h=300&fit=cover&output=avif";
+
+        VImage image = process_file<VImage>(test_image, params);
+
+        CHECK_THAT(image.get_string("vips-loader"), Equals("heifload_buffer"));
+
+        // "heif-compression" metadata added in vips 8.11
+        if (!pre_8_11) {
+            CHECK_THAT(image.get_string("heif-compression"), Equals("av1"));
+        }
+
+        CHECK(image.width() == 300);
+        CHECK(image.height() == 300);
+    }
+
     SECTION("tiff") {
         if (vips_type_find("VipsOperation",
                            pre_8_11 ? "tiffload_buffer" : "tiffload_source") ==
@@ -247,6 +274,30 @@ TEST_CASE("quality and compression", "[stream]") {
         CHECK(buffer_85.size() < buffer_95.size());
     }
 
+    SECTION("avif quality") {
+        if (vips_type_find("VipsOperation",
+                           pre_8_11 ? "heifload_buffer" : "heifload_source") ==
+                0 ||
+            vips_type_find("VipsOperation",
+                           pre_8_11 ? "heifsave_buffer" : "heifsave_target") ==
+                0) {
+            SUCCEED("no avif support, skipping test");
+            return;
+        }
+
+        auto test_image = fixtures->input_avif;
+        auto params_75 = "w=320&h=240&fit=cover&q=75";
+        auto params_95 = "w=320&h=240&fit=cover&q=95";
+
+        std::string buffer_75 =
+            process_file<std::string>(test_image, params_75);
+
+        std::string buffer_95 =
+            process_file<std::string>(test_image, params_95);
+
+        CHECK(buffer_75.size() < buffer_95.size());
+    }
+
     SECTION("tiff quality") {
         if (vips_type_find("VipsOperation",
                            pre_8_11 ? "tiffload_buffer" : "tiffload_source") ==
@@ -384,6 +435,22 @@ TEST_CASE("metadata", "[stream]") {
         CHECK_THAT(buffer, Contains(R"("format":"webp")"));
     }
 
+    SECTION("avif") {
+        if (vips_type_find("VipsOperation",
+                           pre_8_11 ? "heifload_buffer" : "heifload_source") ==
+            0) {
+            SUCCEED("no avif support, skipping test");
+            return;
+        }
+
+        auto test_image = fixtures->input_avif;
+        auto params = "output=json";
+
+        std::string buffer = process_file<std::string>(test_image, params);
+
+        CHECK_THAT(buffer, Contains(R"("format":"heif")"));
+    }
+
     SECTION("tiff") {
         if (vips_type_find("VipsOperation",
                            pre_8_11 ? "tiffload_buffer" : "tiffload_source") ==
@@ -430,7 +497,7 @@ TEST_CASE("metadata", "[stream]") {
         CHECK_THAT(buffer, Contains(R"("format":"pdf")"));
     }
 
-    SECTION("heif") {
+    SECTION("heic") {
         if (vips_type_find("VipsOperation",
                            pre_8_11 ? "heifload_buffer" : "heifload_source") ==
             0) {
diff --git a/valgrind.suppress b/test/valgrind.suppress
similarity index 100%
rename from valgrind.suppress
rename to test/valgrind.suppress