Module Speex

module Speex: sig .. end
Functions for manipulating speex audio data using libspeex.


Author(s): Romain Beauxis


exception Invalid_frame_size
type mode = 
| Narrowband
| Wideband
| Ultra_wideband
type control = 
| SPEEX_RESET_STATE (*Set/get enhancement on/off (decoder only)*)
| SPEEX_SET_ENH
| SPEEX_GET_ENH (*Obtain frame size used by encoder/decoder*)
| SPEEX_GET_FRAME_SIZE (*Set/get quality value*)
| SPEEX_SET_QUALITY (*Set/get sub-mode to use*)
| SPEEX_SET_MODE
| SPEEX_GET_MODE (*Set/get low-band sub-mode to use (wideband only)*)
| SPEEX_SET_LOW_MODE
| SPEEX_GET_LOW_MODE (*Set/get high-band sub-mode to use (wideband only)*)
| SPEEX_SET_HIGH_MODE
| SPEEX_GET_HIGH_MODE (*Set/get VBR on (1) or off (0)*)
| SPEEX_SET_VBR
| SPEEX_GET_VBR (*Set/get quality value for VBR encoding (0-10)*)
| SPEEX_SET_VBR_QUALITY
| SPEEX_GET_VBR_QUALITY (*Set/get complexity of the encoder (0-10)*)
| SPEEX_SET_COMPLEXITY
| SPEEX_GET_COMPLEXITY (*Set/get bitrate*)
| SPEEX_SET_BITRATE
| SPEEX_GET_BITRATE (*Set/get sampling rate*)
| SPEEX_SET_SAMPLING_RATE
| SPEEX_GET_SAMPLING_RATE (*Set/get VAD status (1 for on, 0 for off)*)
| SPEEX_SET_VAD
| SPEEX_GET_VAD (*Set/get Average Bit-Rate (ABR) to n bits per seconds*)
| SPEEX_SET_ABR
| SPEEX_GET_ABR (*Set/get DTX status (1 for on, 0 for off)*)
| SPEEX_SET_DTX
| SPEEX_GET_DTX (*Set/get submode encoding in each frame (1 for yes, 0 for no, setting to no breaks the standard)*)
| SPEEX_SET_SUBMODE_ENCODING
| SPEEX_GET_SUBMODE_ENCODING (*Set/get tuning for packet-loss concealment (expected loss rate)*)
| SPEEX_SET_PLC_TUNING
| SPEEX_GET_PLC_TUNING (*Set/get the max bit-rate allowed in VBR mode*)
| SPEEX_SET_VBR_MAX_BITRATE
| SPEEX_GET_VBR_MAX_BITRATE (*Turn on/off input/output high-pass filtering*)
| SPEEX_SET_HIGHPASS
| SPEEX_GET_HIGHPASS (*Get "activity level" of the last decoded frame, i.e. how much damage we cause if we remove the frame*)
| SPEEX_GET_ACTIVITY
module Header: sig .. end
module Encoder: sig .. end
module Decoder: sig .. end
module Wrapper: sig .. end
module Skeleton: sig .. end