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Remove av_q2d, remove test rounding #797

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Merged
merged 2 commits into from
Jul 31, 2025
Merged

Remove av_q2d, remove test rounding #797

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f7e5e5c
Remove av_q2d, remove test rounding
Jul 31, 2025
9d0857e
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Jul 31, 2025
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3 changes: 2 additions & 1 deletion src/torchcodec/_core/SingleStreamDecoder.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,8 @@ namespace facebook::torchcodec {
namespace {

double ptsToSeconds(int64_t pts, const AVRational& timeBase) {
return static_cast<double>(pts) * av_q2d(timeBase);
// To perform the multiplication before the division, av_q2d is not used
return static_cast<double>(pts) * timeBase.num / timeBase.den;
}

int64_t secondsToClosestPts(double seconds, const AVRational& timeBase) {
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16 changes: 8 additions & 8 deletions test/VideoDecoderTest.cpp
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Expand Up @@ -267,9 +267,9 @@ TEST_P(SingleStreamDecoderTest, SeeksCloseToEof) {
ourDecoder->addVideoStream(-1);
ourDecoder->setCursorPtsInSeconds(388388. / 30'000);
auto output = ourDecoder->getNextFrame();
EXPECT_DOUBLE_EQ(output.ptsSeconds, 388'388. / 30'000);
EXPECT_EQ(output.ptsSeconds, 388'388. / 30'000);
output = ourDecoder->getNextFrame();
EXPECT_DOUBLE_EQ(output.ptsSeconds, 389'389. / 30'000);
EXPECT_EQ(output.ptsSeconds, 389'389. / 30'000);
EXPECT_THROW(ourDecoder->getNextFrame(), std::exception);
}

Expand Down Expand Up @@ -300,7 +300,7 @@ TEST_P(SingleStreamDecoderTest, GetsFramePlayedAtTimestamp) {
// Sanity check: make sure duration is strictly positive.
EXPECT_GT(kPtsPlusDurationOfLastFrame, kPtsOfLastFrameInVideoStream);
output = ourDecoder->getFramePlayedAt(kPtsPlusDurationOfLastFrame - 1e-6);
EXPECT_DOUBLE_EQ(output.ptsSeconds, kPtsOfLastFrameInVideoStream);
EXPECT_EQ(output.ptsSeconds, kPtsOfLastFrameInVideoStream);
}

TEST_P(SingleStreamDecoderTest, SeeksToFrameWithSpecificPts) {
Expand All @@ -311,7 +311,7 @@ TEST_P(SingleStreamDecoderTest, SeeksToFrameWithSpecificPts) {
ourDecoder->setCursorPtsInSeconds(6.0);
auto output = ourDecoder->getNextFrame();
torch::Tensor tensor6FromOurDecoder = output.data;
EXPECT_DOUBLE_EQ(output.ptsSeconds, 180'180. / 30'000);
EXPECT_EQ(output.ptsSeconds, 180'180. / 30'000);
torch::Tensor tensor6FromFFMPEG =
readTensorFromDisk("nasa_13013.mp4.time6.000000.pt");
EXPECT_TRUE(torch::equal(tensor6FromOurDecoder, tensor6FromFFMPEG));
Expand All @@ -327,7 +327,7 @@ TEST_P(SingleStreamDecoderTest, SeeksToFrameWithSpecificPts) {
ourDecoder->setCursorPtsInSeconds(6.1);
output = ourDecoder->getNextFrame();
torch::Tensor tensor61FromOurDecoder = output.data;
EXPECT_DOUBLE_EQ(output.ptsSeconds, 183'183. / 30'000);
EXPECT_EQ(output.ptsSeconds, 183'183. / 30'000);
torch::Tensor tensor61FromFFMPEG =
readTensorFromDisk("nasa_13013.mp4.time6.100000.pt");
EXPECT_TRUE(torch::equal(tensor61FromOurDecoder, tensor61FromFFMPEG));
Expand All @@ -347,7 +347,7 @@ TEST_P(SingleStreamDecoderTest, SeeksToFrameWithSpecificPts) {
ourDecoder->setCursorPtsInSeconds(10.0);
output = ourDecoder->getNextFrame();
torch::Tensor tensor10FromOurDecoder = output.data;
EXPECT_DOUBLE_EQ(output.ptsSeconds, 300'300. / 30'000);
EXPECT_EQ(output.ptsSeconds, 300'300. / 30'000);
torch::Tensor tensor10FromFFMPEG =
readTensorFromDisk("nasa_13013.mp4.time10.000000.pt");
EXPECT_TRUE(torch::equal(tensor10FromOurDecoder, tensor10FromFFMPEG));
Expand All @@ -364,7 +364,7 @@ TEST_P(SingleStreamDecoderTest, SeeksToFrameWithSpecificPts) {
ourDecoder->setCursorPtsInSeconds(6.0);
output = ourDecoder->getNextFrame();
tensor6FromOurDecoder = output.data;
EXPECT_DOUBLE_EQ(output.ptsSeconds, 180'180. / 30'000);
EXPECT_EQ(output.ptsSeconds, 180'180. / 30'000);
EXPECT_TRUE(torch::equal(tensor6FromOurDecoder, tensor6FromFFMPEG));
EXPECT_EQ(ourDecoder->getDecodeStats().numSeeksAttempted, 1);
// We cannot skip a seek here because timestamp=6 has a different keyframe
Expand All @@ -379,7 +379,7 @@ TEST_P(SingleStreamDecoderTest, SeeksToFrameWithSpecificPts) {
ourDecoder->setCursorPtsInSeconds(kPtsOfLastFrameInVideoStream);
output = ourDecoder->getNextFrame();
torch::Tensor tensor7FromOurDecoder = output.data;
EXPECT_DOUBLE_EQ(output.ptsSeconds, 389'389. / 30'000);
EXPECT_EQ(output.ptsSeconds, 389'389. / 30'000);
torch::Tensor tensor7FromFFMPEG =
readTensorFromDisk("nasa_13013.mp4.time12.979633.pt");
EXPECT_TRUE(torch::equal(tensor7FromOurDecoder, tensor7FromFFMPEG));
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4 changes: 2 additions & 2 deletions test/test_ops.py
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Expand Up @@ -781,7 +781,7 @@ def test_next(self, asset):
frame, asset.get_frame_data_by_index(frame_index)
)
frame_info = asset.get_frame_info(frame_index)
assert pts_seconds == pytest.approx(frame_info.pts_seconds)
assert pts_seconds == frame_info.pts_seconds
assert duration_seconds == frame_info.duration_seconds
frame_index += 1

Expand Down Expand Up @@ -985,7 +985,7 @@ def test_pts(self, asset):
frames, asset.get_frame_data_by_index(frame_index)
)

assert pts_seconds == pytest.approx(start_seconds)
assert pts_seconds == start_seconds

def test_sample_rate_conversion(self):
def get_all_frames(asset, sample_rate=None, stop_seconds=None):
Expand Down
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