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/* Copyright (C) 2002 Jean-Marc Valin
File speex_callbacks.c
Callback handling and in-band signalling
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of the Xiph.org Foundation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config-speex.h"
#endif
#include <speex/speex_callbacks.h>
#include "misc.h"
#include "os_support.h"
int speex_inband_handler(SpeexBits *bits, SpeexCallback *callback_list, void *state)
{
int id;
SpeexCallback *callback;
/*speex_bits_advance(bits, 5);*/
id=speex_bits_unpack_unsigned(bits, 4);
callback = callback_list+id;
if (callback->func)
{
return callback->func(bits, state, callback->data);
} else
/*If callback is not registered, skip the right number of bits*/
{
int adv;
if (id<2)
adv = 1;
else if (id<8)
adv = 4;
else if (id<10)
adv = 8;
else if (id<12)
adv = 16;
else if (id<14)
adv = 32;
else
adv = 64;
speex_bits_advance(bits, adv);
}
return 0;
}
int speex_std_mode_request_handler(SpeexBits *bits, void *state, void *data)
{
spx_int32_t m;
m = speex_bits_unpack_unsigned(bits, 4);
speex_encoder_ctl(data, SPEEX_SET_MODE, &m);
return 0;
}
int speex_std_low_mode_request_handler(SpeexBits *bits, void *state, void *data)
{
spx_int32_t m;
m = speex_bits_unpack_unsigned(bits, 4);
speex_encoder_ctl(data, SPEEX_SET_LOW_MODE, &m);
return 0;
}
int speex_std_high_mode_request_handler(SpeexBits *bits, void *state, void *data)
{
spx_int32_t m;
m = speex_bits_unpack_unsigned(bits, 4);
speex_encoder_ctl(data, SPEEX_SET_HIGH_MODE, &m);
return 0;
}
int speex_std_vbr_request_handler(SpeexBits *bits, void *state, void *data)
{
spx_int32_t vbr;
vbr = speex_bits_unpack_unsigned(bits, 1);
speex_encoder_ctl(data, SPEEX_SET_VBR, &vbr);
return 0;
}
int speex_std_enh_request_handler(SpeexBits *bits, void *state, void *data)
{
spx_int32_t enh;
enh = speex_bits_unpack_unsigned(bits, 1);
speex_decoder_ctl(data, SPEEX_SET_ENH, &enh);
return 0;
}
int speex_std_vbr_quality_request_handler(SpeexBits *bits, void *state, void *data)
{
float qual;
qual = speex_bits_unpack_unsigned(bits, 4);
speex_encoder_ctl(data, SPEEX_SET_VBR_QUALITY, &qual);
return 0;
}
int speex_std_char_handler(SpeexBits *bits, void *state, void *data)
{
unsigned char ch;
ch = speex_bits_unpack_unsigned(bits, 8);
_speex_putc(ch, data);
/*printf("speex_std_char_handler ch=%x\n", ch);*/
return 0;
}
/* Default handler for user callbacks: skip it */
int speex_default_user_handler(SpeexBits *bits, void *state, void *data)
{
int req_size = speex_bits_unpack_unsigned(bits, 4);
speex_bits_advance(bits, 5+8*req_size);
return 0;
}
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