afInitCompression (3) Linux Manual Page
afInitCompression – initialize compression for a track in an audio file setup
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.