libavutilsamplefmth

libavutilsamplefmth is not a standard FFmpeg module name, but it appears to reference the sample format utilities found in FFmpeg’s libavutil library, typically accessed via libavutil/samplefmt.h. The libavutil sample format component defines how audio samples are stored in memory and provides helpers for working with those formats in a format-agnostic way.

The core of the module is an enumeration of audio sample formats that describe both the data type (for example, 8-bit, 16-bit, 32-bit integer or floating point) and the memory layout (packed/interleaved versus planar). This enables FFmpeg libraries and applications to represent a wide range of audio data precisely and consistently across codecs and containers. The formats cover common bit depths and both integer and floating-point representations, with separate variants for planar storage where each channel is stored in its own separate plane.

In addition to the enumeration, the sample format utilities provide helper routines to query properties of a format, such as the size in bytes per sample, whether a format is planar, and to obtain human-readable names for debugging and logging. These utilities support format conversion and compatibility checks, aiding memory allocation, buffer management, and data processing in audio pipelines.

Usage of the module spans decoding, encoding, resampling, and processing components. By centralizing the definitions and helpers for sample formats, libavutil/samplefmt enables developers to write flexible, portable audio code that can handle multiple formats and layouts without hard-coding format-specific logic.

For precise references, consult the official FFmpeg sources or documentation for libavutil/samplefmt.h. If the intended reference is the canonical FFmpeg API, the conventional name is libavutil/samplefmt rather than the concatenated form.