Audio Loader#

bool trt_edgellm::rt::audio::loadAudioFile(
std::filesystem::path const &path,
int32_t targetSampleRate,
AudioPCM &out
)#

PCM container.

Always mono, float32 in [-1, 1]; the decoder mixes multi-channel input down. sampleRate is the rate the samples are at: the decoder resamples ! to the rate it was asked for, audioUtils::wrapPcm records the rate the ! caller states. samples stays readable for as long as this container ! holds it: a decoder attaches storage it allocated, wrapPcm attaches ! memory the caller keeps valid for the request. struct AudioPCM { std::shared_ptr<Tensor> samples; //!< [N] Float, host. int32_t sampleRate{16000}; int32_t numChannels{1};

! Sample count in the single channel; zero when no samples are attached. int64_t numSamples() const noexcept; };

! Load raw audio bytes (wav / mp3 / flac) into mono float32 PCM ! resampled to targetSampleRate. Internally decodes the container ! via vendored miniaudio (auto-detects format from magic bytes) and ! mixes multi-channel to mono. ! ! http(s)://

URLs are not handled here — bytes are expected to be a ! complete container blob already. ! !

! Load a local audio file (wav / mp3 / flac) into mono float32 PCM ! resampled to

targetSampleRate. ! ! Used by the CLI / offline path. The HTTP server uses loadAudioBytes. ! !

Parameters:

  • bytes – Pointer to the encoded audio bytes. !

  • size – Length of bytes in bytes. !

  • targetSampleRate – Output sample rate (e.g. 16000 for Whisper). !

  • out – Populated on success; on failure out is left in an ! unspecified state (do not consume its contents). !

  • path – Local filesystem path. !

  • targetSampleRate – Output sample rate. !

  • out – Populated on success; on failure out is left in an unspecified state (do not consume its contents).

Returns:

true on success, false on decode failure. bool loadAudioBytes(uint8_t const* bytes, size_t size, int32_t targetSampleRate, AudioPCM& out);

Returns:

true on success, false on open/decode failure.

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