| Value | Meaning |
|---|---|
| AV_SAMPLE_FMT_NONE-1 | |
| 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 |
Audio Sample Formats
@par 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.
@par 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.
@par The data layout as used in av_samples_fill_arrays() and elsewhere in Libav (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.