sample format

Audio Sample Formats.

The data described by the sample format is always in native-endian order. Sample values can be expressed by native C types, hence the lack of a signed 24-bit sample format even though it is a common raw audio data format.

The floating-point formats are based on full volume being in the range [-1.0, 1.0]. Any values outside this range are beyond full volume level.

The data layout as used in av_samples_fill_arrays() and elsewhere in FFmpeg (such as AVFrame in libavcodec) is as follows:

For planar sample formats, each audio channel is in a separate data plane, and linesize is the buffer size, in bytes, for a single plane. All data planes must be the same size. For packed sample formats, only the first data plane is used, and samples for each channel are interleaved. In this case, linesize is the buffer size, in bytes, for the 1 plane.

Enumerator:

AV_SAMPLE_FMT_NONE  AV_SAMPLE_FMT_U8 

unsigned 8 bits

AV_SAMPLE_FMT_S16 

signed 16 bits

AV_SAMPLE_FMT_S32 

signed 32 bits

AV_SAMPLE_FMT_FLT 

float

AV_SAMPLE_FMT_DBL 

double

AV_SAMPLE_FMT_U8P 

unsigned 8 bits, planar

AV_SAMPLE_FMT_S16P 

signed 16 bits, planar

AV_SAMPLE_FMT_S32P 

signed 32 bits, planar

AV_SAMPLE_FMT_FLTP 

float, planar

AV_SAMPLE_FMT_DBLP 

double, planar

AV_SAMPLE_FMT_NB 

Number of sample formats. DO NOT USE if linking dynamically.