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timecode_c: add samples()/to_samples() conversion

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This commit is contained in:
Moritz Bunkus 2013-07-04 21:33:05 +02:00
parent 06c07a0906
commit 89fea5a1ef
2 changed files with 34 additions and 0 deletions
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14
src/common/timecode.h
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@ -105,6 +105,14 @@ public:
return m_timecode * 9 / 100000;
}
T to_samples(T sample_rate) const {
if (!m_valid)
throw std::domain_error{"invalid timecode"};
if (!sample_rate)
throw std::domain_error{"invalid sample rate"};
return (m_timecode * sample_rate / 100000000 + 5) / 10;
}
// arithmetic
basic_timecode_c<T> operator +=(basic_timecode_c<T> const &other) {
if (!m_valid || !other.m_valid)
@ -186,6 +194,12 @@ public:
static basic_timecode_c<T> factor(T value) {
return basic_timecode_c<T>{value};
}
static basic_timecode_c<T> samples(T samples, T sample_rate) {
if (!sample_rate)
throw std::domain_error{"invalid sample rate"};
return basic_timecode_c<T>{(samples * 10000000000 / sample_rate + 5) / 10};
}
};
typedef basic_timecode_c<int64_t> timecode_c;

20
tests/unit/common/basic_timecode_c.cpp
View File

@ -113,6 +113,26 @@ TEST(BasicTimecode, ThrowOnDeconstructionOfInvalid) {
EXPECT_NO_THROW(timecode_c{}.to_ns(1));
}
TEST(BasicTimecode, ConstructFromSamples) {
EXPECT_EQ(timecode_c::samples( 0, 48000).to_ns(), 0);
EXPECT_EQ(timecode_c::samples( 19999, 48000).to_ns(), 416645833);
EXPECT_EQ(timecode_c::samples( 20000, 48000).to_ns(), 416666667);
EXPECT_EQ(timecode_c::samples( 48000, 48000).to_ns(), 1000000000);
EXPECT_EQ(timecode_c::samples(123456, 48000).to_ns(), 2572000000);
EXPECT_THROW(timecode_c::samples(123, 0), std::domain_error);
}
TEST(BasicTimecode, DeconstructToSamples) {
EXPECT_EQ(timecode_c::ns( 0).to_samples(48000), 0);
EXPECT_EQ(timecode_c::ns( 416645833).to_samples(48000), 19999);
EXPECT_EQ(timecode_c::ns( 416666667).to_samples(48000), 20000);
EXPECT_EQ(timecode_c::ns(1000000000).to_samples(48000), 48000);
EXPECT_EQ(timecode_c::ns(2572000000).to_samples(48000), 123456);
EXPECT_THROW(timecode_c::ns(123).to_samples(0), std::domain_error);
}
TEST(BasicTimecode, Resetting) {
auto v = timecode_c::ns(1);