1 // Copyright 2014 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
8 #include "media/filters/h264_bitstream_buffer.h"
9 #include "testing/gtest/include/gtest/gtest.h"
14 const uint64_t kTestPattern = 0xfedcba0987654321;
16 uint64_t GetDataFromBuffer(const uint8_t* ptr, uint64_t num_bits) {
18 while (num_bits > 8) {
21 got <<= (num_bits > 8 ? 8 : num_bits);
25 uint64_t temp = (*ptr & 0xff);
26 temp >>= (8 - num_bits);
33 class H264BitstreamBufferAppendBitsTest
34 : public ::testing::TestWithParam<uint64_t> {};
36 // TODO(posciak): More tests!
38 TEST_P(H264BitstreamBufferAppendBitsTest, AppendAndVerifyBits) {
39 auto b = base::MakeRefCounted<H264BitstreamBuffer>();
40 uint64_t num_bits = GetParam();
41 // TODO(posciak): Tests for >64 bits.
42 ASSERT_LE(num_bits, 64u);
43 uint64_t num_bytes = base::bits::AlignUp(num_bits, uint64_t{8}) / 8;
45 b->AppendBits(num_bits, kTestPattern);
48 EXPECT_EQ(b->BytesInBuffer(), num_bytes);
50 const uint8_t* ptr = b->data();
51 uint64_t got = GetDataFromBuffer(ptr, num_bits);
52 uint64_t expected = kTestPattern;
55 expected &= ((1ull << num_bits) - 1);
57 EXPECT_EQ(got, expected) << std::hex << "0x" << got << " vs 0x" << expected;
60 TEST_F(H264BitstreamBufferAppendBitsTest, VerifyFlushAndBitsInBuffer) {
61 auto b = base::MakeRefCounted<H264BitstreamBuffer>();
62 uint64_t num_bits = 20;
63 uint64_t num_bytes = base::bits::AlignUp(num_bits, uint64_t{8}) / 8;
65 b->AppendBits(num_bits, kTestPattern);
68 EXPECT_EQ(b->BytesInBuffer(), num_bytes);
69 EXPECT_EQ(b->BitsInBuffer(), num_bits);
71 const uint8_t* ptr = b->data();
72 uint64_t got = GetDataFromBuffer(ptr, num_bits);
73 uint64_t expected = kTestPattern;
74 expected &= ((1ull << num_bits) - 1);
76 EXPECT_EQ(got, expected) << std::hex << "0x" << got << " vs 0x" << expected;
79 INSTANTIATE_TEST_SUITE_P(AppendNumBits,
80 H264BitstreamBufferAppendBitsTest,
81 ::testing::Range(static_cast<uint64_t>(1),
82 static_cast<uint64_t>(65)));