128 lines
4.5 KiB
C
128 lines
4.5 KiB
C
/* Copyright (C) 2002 Jean-Marc Valin*/
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/**
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@file speex_callbacks.h
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@brief Describes callback handling and in-band signalling
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*/
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SPEEX_CALLBACKS_H
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#define SPEEX_CALLBACKS_H
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#include "speex.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** Total number of callbacks */
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#define SPEEX_MAX_CALLBACKS 16
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/* Describes all the in-band requests */
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/*These are 1-bit requests*/
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/** Request for perceptual enhancement (1 for on, 0 for off) */
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#define SPEEX_INBAND_ENH_REQUEST 0
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/** Reserved */
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#define SPEEX_INBAND_RESERVED1 1
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/*These are 4-bit requests*/
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/** Request for a mode change */
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#define SPEEX_INBAND_MODE_REQUEST 2
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/** Request for a low mode change */
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#define SPEEX_INBAND_LOW_MODE_REQUEST 3
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/** Request for a high mode change */
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#define SPEEX_INBAND_HIGH_MODE_REQUEST 4
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/** Request for VBR (1 on, 0 off) */
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#define SPEEX_INBAND_VBR_QUALITY_REQUEST 5
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/** Request to be sent acknowledge */
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#define SPEEX_INBAND_ACKNOWLEDGE_REQUEST 6
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/** Request for VBR (1 for on, 0 for off) */
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#define SPEEX_INBAND_VBR_REQUEST 7
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/*These are 8-bit requests*/
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/** Send a character in-band */
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#define SPEEX_INBAND_CHAR 8
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/** Intensity stereo information */
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#define SPEEX_INBAND_STEREO 9
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/*These are 16-bit requests*/
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/** Transmit max bit-rate allowed */
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#define SPEEX_INBAND_MAX_BITRATE 10
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/*These are 32-bit requests*/
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/** Acknowledge packet reception */
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#define SPEEX_INBAND_ACKNOWLEDGE 12
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/** Callback function type */
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typedef int (*speex_callback_func)(SpeexBits *bits, void *state, void *data);
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/** Callback information */
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typedef struct SpeexCallback {
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int callback_id; /**< ID associated to the callback */
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speex_callback_func func; /**< Callback handler function */
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void *data; /**< Data that will be sent to the handler */
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void *reserved1; /**< Reserved for future use */
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int reserved2; /**< Reserved for future use */
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} SpeexCallback;
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/** Handle in-band request */
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int speex_inband_handler(SpeexBits *bits, SpeexCallback *callback_list, void *state);
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/** Standard handler for mode request (change mode, no questions asked) */
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int speex_std_mode_request_handler(SpeexBits *bits, void *state, void *data);
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/** Standard handler for high mode request (change high mode, no questions asked) */
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int speex_std_high_mode_request_handler(SpeexBits *bits, void *state, void *data);
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/** Standard handler for in-band characters (write to stderr) */
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int speex_std_char_handler(SpeexBits *bits, void *state, void *data);
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/** Default handler for user-defined requests: in this case, just ignore */
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int speex_default_user_handler(SpeexBits *bits, void *state, void *data);
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int speex_std_low_mode_request_handler(SpeexBits *bits, void *state, void *data);
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int speex_std_vbr_request_handler(SpeexBits *bits, void *state, void *data);
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int speex_std_enh_request_handler(SpeexBits *bits, void *state, void *data);
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int speex_std_vbr_quality_request_handler(SpeexBits *bits, void *state, void *data);
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#ifdef __cplusplus
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}
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#endif
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#endif
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