Add test case for jpeg recompression with incomplete Huffman code. (libjxl#3872)

This uses 760 entries in the 2-level Huffman lookup table, which is
the maximum found so far.

(cherry picked from commit 57dd925)

Author: szabadka

lib/jxl/roundtrip_test.cc

@@ -991,3 +991,109 @@ JXL_TRANSCODE_JPEG_TEST(RoundtripTest, TestJPEGReconstruction) {
   ASSERT_EQ(used, orig.size());
   EXPECT_EQ(0, memcmp(reconstructed_buffer.data(), orig.data(), used));
 }
+
+JXL_TRANSCODE_JPEG_TEST(RoundtripTest,
+                        TestJPEGReconstructionWithIncompleteHuffmanCode) {
+  TEST_LIBJPEG_SUPPORT();
+  static constexpr uint8_t kJPEGBytes[] = {
+      // SOI
+      0xff, 0xd8,  //
+      // SOF
+      0xff, 0xc0, 0x00, 0x0b, 0x08, 0x00, 0x01, 0x00, 0x01, 0x01,  //
+      0x01, 0x11, 0x00,                                            //
+      // DQT
+      0xff, 0xdb, 0x00, 0x43, 0x00, 0x03, 0x02, 0x02, 0x03, 0x02,  //
+      0x02, 0x03, 0x03, 0x03, 0x03, 0x04, 0x03, 0x03, 0x04, 0x05,  //
+      0x08, 0x05, 0x05, 0x04, 0x04, 0x05, 0x0a, 0x07, 0x07, 0x06,  //
+      0x08, 0x0c, 0x0a, 0x0c, 0x0c, 0x0b, 0x0a, 0x0b, 0x0b, 0x0d,  //
+      0x0e, 0x12, 0x10, 0x0d, 0x0e, 0x11, 0x0e, 0x0b, 0x0b, 0x10,  //
+      0x16, 0x10, 0x11, 0x13, 0x14, 0x15, 0x15, 0x15, 0x0c, 0x0f,  //
+      0x17, 0x18, 0x16, 0x14, 0x18, 0x12, 0x14, 0x15, 0x14,        //
+      // DHT
+      0xff, 0xc4, 0x01, 0x30,  // marker, len
+      0x00,                    // slot id DC0
+      // counts for lengths 1 - 16 (total_count: 12)
+      0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00,  //
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      // symbols: 0 - 11
+      0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,  //
+      0x0a, 0x0b,                                                  //
+      0x13,  // slot id AC3
+      // counts for lengths 1 - 16 (total_count: 256)
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01,  //
+      0x01, 0x01, 0x01, 0x01, 0x01, 0xf9,                          //
+      // symbols: 0 - 255
+      0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,  //
+      0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13,  //
+      0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d,  //
+      0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,  //
+      0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31,  //
+      0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,  //
+      0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45,  //
+      0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,  //
+      0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,  //
+      0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63,  //
+      0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d,  //
+      0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,  //
+      0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81,  //
+      0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b,  //
+      0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95,  //
+      0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,  //
+      0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9,  //
+      0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3,  //
+      0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd,  //
+      0xbe, 0xbf, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,  //
+      0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0, 0xd1,  //
+      0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb,  //
+      0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5,  //
+      0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,  //
+      0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9,  //
+      0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
+      // SOS
+      0xff, 0xda, 0x00, 0x08, 0x01, 0x01, 0x03, 0x00, 0x3f, 0x00,  //
+      // entropy coded data (first 16 bit: DC 0, next 9 bits: AC eob)
+      0xfc, 0xaa, 0x00, 0x00,  //
+      // EOI
+      0xff, 0xd9,  //
+  };
+  static constexpr size_t kJPEGSize = sizeof(kJPEGBytes);
+
+  JxlEncoderPtr enc = JxlEncoderMake(nullptr);
+  JxlEncoderFrameSettings* frame_settings =
+      JxlEncoderFrameSettingsCreate(enc.get(), nullptr);
+
+  EXPECT_EQ(JXL_ENC_SUCCESS, JxlEncoderUseContainer(enc.get(), JXL_TRUE));
+  EXPECT_EQ(JXL_ENC_SUCCESS, JxlEncoderStoreJPEGMetadata(enc.get(), JXL_TRUE));
+  EXPECT_EQ(JXL_ENC_SUCCESS,
+            JxlEncoderAddJPEGFrame(frame_settings, kJPEGBytes, kJPEGSize));
+  JxlEncoderCloseInput(enc.get());
+
+  std::vector<uint8_t> compressed;
+  EncodeWithEncoder(enc.get(), &compressed);
+
+  JxlDecoderPtr dec = JxlDecoderMake(nullptr);
+  EXPECT_EQ(JXL_DEC_SUCCESS,
+            JxlDecoderSubscribeEvents(
+                dec.get(), JXL_DEC_JPEG_RECONSTRUCTION | JXL_DEC_FULL_IMAGE));
+  JxlDecoderSetInput(dec.get(), compressed.data(), compressed.size());
+  EXPECT_EQ(JXL_DEC_JPEG_RECONSTRUCTION, JxlDecoderProcessInput(dec.get()));
+  std::vector<uint8_t> reconstructed_buffer(128);
+  EXPECT_EQ(JXL_DEC_SUCCESS,
+            JxlDecoderSetJPEGBuffer(dec.get(), reconstructed_buffer.data(),
+                                    reconstructed_buffer.size()));
+  size_t used = 0;
+  JxlDecoderStatus dec_process_result = JXL_DEC_JPEG_NEED_MORE_OUTPUT;
+  while (dec_process_result == JXL_DEC_JPEG_NEED_MORE_OUTPUT) {
+    used = reconstructed_buffer.size() - JxlDecoderReleaseJPEGBuffer(dec.get());
+    reconstructed_buffer.resize(reconstructed_buffer.size() * 2);
+    EXPECT_EQ(
+        JXL_DEC_SUCCESS,
+        JxlDecoderSetJPEGBuffer(dec.get(), reconstructed_buffer.data() + used,
+                                reconstructed_buffer.size() - used));
+    dec_process_result = JxlDecoderProcessInput(dec.get());
+  }
+  ASSERT_EQ(JXL_DEC_FULL_IMAGE, dec_process_result);
+  used = reconstructed_buffer.size() - JxlDecoderReleaseJPEGBuffer(dec.get());
+  ASSERT_EQ(used, kJPEGSize);
+  EXPECT_EQ(0, memcmp(reconstructed_buffer.data(), kJPEGBytes, used));
+}