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Ensure correct file length and sample skip calculations on 32-bit systems by using uint64_t

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On 32-bit architectures, size_t may not be large enough to represent large file
sizes or sample counts. This commit updates the file length computation and the
return type of samplesToSkip() to use uint64_t, allowing accurate handling of
large files and ensuring consistency across platforms.
This commit is contained in:
Marc Majoral 2025-05-28 12:56:34 +02:00 committed by Carles Fernandez
parent 0fa695a825
commit 80e5280434
2 changed files with 7 additions and 7 deletions
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10
src/algorithms/signal_source/adapters/file_source_base.cc
View File

@ -365,16 +365,16 @@ std::tuple<size_t, bool> FileSourceBase::itemTypeToSize()
double FileSourceBase::packetsPerSample() const { return 1.0; }
size_t FileSourceBase::samplesToSkip() const
uint64_t FileSourceBase::samplesToSkip() const
{
auto samples_to_skip = size_t(0);
auto samples_to_skip = uint64_t(0);
if (seconds_to_skip_ > 0)
{
// sampling_frequency is in terms of actual samples (output packets). If this source is
// compressed, there may be multiple packets per file (read) sample. First compute the
// actual number of samples to skip (function of time and sample rate)
samples_to_skip = static_cast<size_t>(seconds_to_skip_ * sampling_frequency_);
samples_to_skip = static_cast<uint64_t>(seconds_to_skip_ * sampling_frequency_);
// convert from sample to input items, scaling this value to input item space
// (rounding up)
@ -396,7 +396,7 @@ size_t FileSourceBase::samplesToSkip() const
}
size_t FileSourceBase::computeSamplesInFile() const
uint64_t FileSourceBase::computeSamplesInFile() const
{
auto n_samples = samples();
@ -410,7 +410,7 @@ size_t FileSourceBase::computeSamplesInFile() const
* A possible solution is to compute the file length in samples using file size, excluding at least
* the last 2 milliseconds, and enable always the valve block
*/
const auto tail = static_cast<size_t>(std::ceil(minimum_tail_s_ * sampling_frequency()));
const auto tail = static_cast<uint64_t>(std::ceil(minimum_tail_s_ * sampling_frequency()));
if (tail > size)
{

4
src/algorithms/signal_source/adapters/file_source_base.h
View File

@ -112,10 +112,10 @@ protected:
virtual double packetsPerSample() const;
//! Compute the number of samples to skip
virtual size_t samplesToSkip() const;
virtual uint64_t samplesToSkip() const;
//! Compute the number of samples in the file
size_t computeSamplesInFile() const;
uint64_t computeSamplesInFile() const;
//! Abstracted front-end source. Sub-classes may override if they create specialized chains to
//! decode source files into a usable format