test/byte_alignment_test.cc

   1 /*
   2  *  Copyright (c) 2014 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11 #include <string>
  12
  13 #include "./vpx_config.h"
  14 #include "test/codec_factory.h"
  15 #include "test/decode_test_driver.h"
  16 #include "test/md5_helper.h"
  17 #include "test/util.h"
  18 #if CONFIG_WEBM_IO
  19 #include "test/webm_video_source.h"
  20 #endif
  21
  22 namespace {
  23
  24 #if CONFIG_WEBM_IO
  25
  26 const int kLegacyByteAlignment = 0;
  27 const int kLegacyYPlaneByteAlignment = 32;
  28 const int kNumPlanesToCheck = 3;
  29 const char kVP9TestFile[] = "vp90-2-02-size-lf-1920x1080.webm";
  30 const char kVP9Md5File[] = "vp90-2-02-size-lf-1920x1080.webm.md5";
  31
  32 struct ByteAlignmentTestParam {
  33   int byte_alignment;
  34   vpx_codec_err_t expected_value;
  35   bool decode_remaining;
  36 };
  37
  38 const ByteAlignmentTestParam kBaTestParams[] = {
  39   {kLegacyByteAlignment, VPX_CODEC_OK, true},
  40   {32, VPX_CODEC_OK, true},
  41   {64, VPX_CODEC_OK, true},
  42   {128, VPX_CODEC_OK, true},
  43   {256, VPX_CODEC_OK, true},
  44   {512, VPX_CODEC_OK, true},
  45   {1024, VPX_CODEC_OK, true},
  46   {1, VPX_CODEC_INVALID_PARAM, false},
  47   {-2, VPX_CODEC_INVALID_PARAM, false},
  48   {4, VPX_CODEC_INVALID_PARAM, false},
  49   {16, VPX_CODEC_INVALID_PARAM, false},
  50   {255, VPX_CODEC_INVALID_PARAM, false},
  51   {2048, VPX_CODEC_INVALID_PARAM, false},
  52 };
  53
  54 // Class for testing byte alignment of reference buffers.
  55 class ByteAlignmentTest
  56     : public ::testing::TestWithParam<ByteAlignmentTestParam> {
  57  protected:
  58   ByteAlignmentTest()
  59       : video_(NULL),
  60         decoder_(NULL),
  61         md5_file_(NULL) {}
  62
  63   virtual void SetUp() {
  64     video_ = new libvpx_test::WebMVideoSource(kVP9TestFile);
  65     ASSERT_TRUE(video_ != NULL);
  66     video_->Init();
  67     video_->Begin();
  68
  69     const vpx_codec_dec_cfg_t cfg = vpx_codec_dec_cfg_t();
  70     decoder_ = new libvpx_test::VP9Decoder(cfg, 0);
  71     ASSERT_TRUE(decoder_ != NULL);
  72
  73     OpenMd5File(kVP9Md5File);
  74   }
  75
  76   virtual void TearDown() {
  77     if (md5_file_ != NULL)
  78       fclose(md5_file_);
  79
  80     delete decoder_;
  81     delete video_;
  82   }
  83
  84   void SetByteAlignment(int byte_alignment, vpx_codec_err_t expected_value) {
  85     decoder_->Control(VP9_SET_BYTE_ALIGNMENT, byte_alignment, expected_value);
  86   }
  87
  88   vpx_codec_err_t DecodeOneFrame(int byte_alignment_to_check) {
  89     const vpx_codec_err_t res =
  90         decoder_->DecodeFrame(video_->cxdata(), video_->frame_size());
  91     CheckDecodedFrames(byte_alignment_to_check);
  92     if (res == VPX_CODEC_OK)
  93       video_->Next();
  94     return res;
  95   }
  96
  97   vpx_codec_err_t DecodeRemainingFrames(int byte_alignment_to_check) {
  98     for (; video_->cxdata() != NULL; video_->Next()) {
  99       const vpx_codec_err_t res =
 100           decoder_->DecodeFrame(video_->cxdata(), video_->frame_size());
 101       if (res != VPX_CODEC_OK)
 102         return res;
 103       CheckDecodedFrames(byte_alignment_to_check);
 104     }
 105     return VPX_CODEC_OK;
 106   }
 107
 108  private:
 109   // Check if |data| is aligned to |byte_alignment_to_check|.
 110   // |byte_alignment_to_check| must be a power of 2.
 111   void CheckByteAlignment(const uint8_t *data, int byte_alignment_to_check) {
 112     ASSERT_EQ(0u, reinterpret_cast<size_t>(data) % byte_alignment_to_check);
 113   }
 114
 115   // Iterate through the planes of the decoded frames and check for
 116   // alignment based off |byte_alignment_to_check|.
 117   void CheckDecodedFrames(int byte_alignment_to_check) {
 118     libvpx_test::DxDataIterator dec_iter = decoder_->GetDxData();
 119     const vpx_image_t *img;
 120
 121     // Get decompressed data
 122     while ((img = dec_iter.Next()) != NULL) {
 123       if (byte_alignment_to_check == kLegacyByteAlignment) {
 124         CheckByteAlignment(img->planes[0], kLegacyYPlaneByteAlignment);
 125       } else {
 126         for (int i = 0; i < kNumPlanesToCheck; ++i) {
 127           CheckByteAlignment(img->planes[i], byte_alignment_to_check);
 128         }
 129       }
 130       CheckMd5(*img);
 131     }
 132   }
 133
 134   // TODO(fgalligan): Move the MD5 testing code into another class.
 135   void OpenMd5File(const std::string &md5_file_name_) {
 136     md5_file_ = libvpx_test::OpenTestDataFile(md5_file_name_);
 137     ASSERT_TRUE(md5_file_ != NULL) << "MD5 file open failed. Filename: "
 138         << md5_file_name_;
 139   }
 140
 141   void CheckMd5(const vpx_image_t &img) {
 142     ASSERT_TRUE(md5_file_ != NULL);
 143     char expected_md5[33];
 144     char junk[128];
 145
 146     // Read correct md5 checksums.
 147     const int res = fscanf(md5_file_, "%s  %s", expected_md5, junk);
 148     ASSERT_NE(EOF, res) << "Read md5 data failed";
 149     expected_md5[32] = '\0';
 150
 151     ::libvpx_test::MD5 md5_res;
 152     md5_res.Add(&img);
 153     const char *const actual_md5 = md5_res.Get();
 154
 155     // Check md5 match.
 156     ASSERT_STREQ(expected_md5, actual_md5) << "MD5 checksums don't match";
 157   }
 158
 159   libvpx_test::WebMVideoSource *video_;
 160   libvpx_test::VP9Decoder *decoder_;
 161   FILE *md5_file_;
 162 };
 163
 164 TEST_F(ByteAlignmentTest, SwitchByteAlignment) {
 165   const int num_elements = 14;
 166   const int byte_alignments[] = { 0, 32, 64, 128, 256, 512, 1024,
 167                                   0, 1024, 32, 512, 64, 256, 128 };
 168
 169   for (int i = 0; i < num_elements; ++i) {
 170     SetByteAlignment(byte_alignments[i], VPX_CODEC_OK);
 171     ASSERT_EQ(VPX_CODEC_OK, DecodeOneFrame(byte_alignments[i]));
 172   }
 173   SetByteAlignment(byte_alignments[0], VPX_CODEC_OK);
 174   ASSERT_EQ(VPX_CODEC_OK, DecodeRemainingFrames(byte_alignments[0]));
 175 }
 176
 177 TEST_P(ByteAlignmentTest, TestAlignment) {
 178   const ByteAlignmentTestParam t = GetParam();
 179   SetByteAlignment(t.byte_alignment, t.expected_value);
 180   if (t.decode_remaining)
 181     ASSERT_EQ(VPX_CODEC_OK, DecodeRemainingFrames(t.byte_alignment));
 182 }
 183
 184 INSTANTIATE_TEST_CASE_P(Alignments, ByteAlignmentTest,
 185                         ::testing::ValuesIn(kBaTestParams));
 186
 187 #endif  // CONFIG_WEBM_IO
 188
 189 }  // namespace