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LibMedia/Audio: Use duration in the container if stream doesn't have one

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Luke Wilde 2025-03-10 15:00:35 +00:00 • committed by Alexander Kalenik
commit 4df2de2f20
Notes: github-actions[bot] 2025-03-13 18:34:50 +00:00
1 changed files with 14 additions and 3 deletions
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17
Libraries/LibMedia/Audio/FFmpegLoader.cpp
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@ -90,9 +90,20 @@ ErrorOr<void> FFmpegLoaderPlugin::initialize()
// This is an initial estimate of the total number of samples in the stream.
// During decoding, we might need to increase the number as more frames come in.
double duration_in_seconds = static_cast<double>(m_audio_stream->duration) * time_base();
if (duration_in_seconds < 0)
return Error::from_string_literal("Negative stream duration");
auto duration_in_seconds = TRY([this] -> ErrorOr<double> {
if (m_audio_stream->duration >= 0) {
auto time_base = av_q2d(m_audio_stream->time_base);
return static_cast<double>(m_audio_stream->duration) * time_base;
}
// If the stream doesn't specify the duration, fallback to what the container says the duration is.
// If the container doesn't know the duration, then we're out of luck. Return an error.
if (m_format_context->duration < 0)
return Error::from_string_literal("Negative stream duration");
return static_cast<double>(m_format_context->duration) / AV_TIME_BASE;
}());
m_total_samples = AK::round_to<decltype(m_total_samples)>(sample_rate() * duration_in_seconds);
// Allocate packet (logical chunk of data) and frame (video / audio frame) buffers