SYNOPSIS
#include <audiofile.h>
void afInitCompression(AFfilesetup setup, int track, int compression);
PARAMETERS
setup is a valid file setup returned by afNewFileSetup(3).
track specifies a track within the audio file setup. track is always AF_DEFAULT_TRACK for all currently supported file formats.
compression is an identifier specifying the compression type (such as AF_COMPRESSION_G711_ULAW) to be used for audio data in the track.
DESCRIPTION
Given an AFfilesetup structure created with afNewFileSetup(3) and a track identified by track (AF_DEFAULT_TRACK for all currently supported file formats), afInitCompression initializes the track to the specified compression.
The following compression types are currently supported:
AF_COMPRESSION_NONE
- no compression
AF_COMPRESSION_G711_ULAW
- CCITT G.711 mu-law encoding
AF_COMPRESSION_G711_ALAW
- CCITT G.711 A-law encoding
AF_COMPRESSION_IMA
- IMA ADPCM encoding
AF_COMPRESSION_MS_ADPCM
- MS ADPCM encoding
AF_COMPRESSION_FLAC
- FLAC
AF_COMPRESSION_ALAC
- Apple Lossless Audio Codec
ERRORS
afInitCompression can produce the following errors:
AF_BAD_FILESETUP
-
setup represents an invalid file setup.
AF_BAD_TRACKID
-
track represents an invalid track identifier.
AF_BAD_COMPTYPE
-
compression represents an invalid compression type.