oggvorbis
PHP Manual

预定义常量

下列常量由此扩展定义,且仅在此扩展编译入 PHP 或在运行时动态载入时可用。

OGG/Vorbis supports PCM encodings in the following formats
Constant Definition
OGGVORBIS_PCM_U8 Unsigned 8-bit PCM.
OGGVORBIS_PCM_S8 Signed 8-bit PCM.
OGGVORBIS_PCM_U16_LE Unsigned 16-bit PCM. Little Endian byte order.
OGGVORBIS_PCM_U16_BE Unsigned 16-bit PCM. Big Endian byte order.
OGGVORBIS_PCM_S16_LE Signed 16-bit PCM. Little Endian byte order.
OGGVORBIS_PCM_S16_BE Signed 16-bit PCM. Big Endian byte order.

oggvorbis
PHP Manual