145 lines
4.2 KiB
C
145 lines
4.2 KiB
C
/* Copyright (C) 2002 Jean-Marc Valin
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File speex_callbacks.c
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Callback handling and in-band signalling
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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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#include "config.h"
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#include <speex/speex_callbacks.h>
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#include "arch.h"
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#include "os_support.h"
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EXPORT int speex_inband_handler(SpeexBits *bits, SpeexCallback *callback_list, void *state)
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{
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int id;
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SpeexCallback *callback;
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/*speex_bits_advance(bits, 5);*/
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id=speex_bits_unpack_unsigned(bits, 4);
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callback = callback_list+id;
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if (callback->func)
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{
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return callback->func(bits, state, callback->data);
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} else
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/*If callback is not registered, skip the right number of bits*/
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{
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int adv;
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if (id<2)
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adv = 1;
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else if (id<8)
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adv = 4;
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else if (id<10)
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adv = 8;
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else if (id<12)
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adv = 16;
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else if (id<14)
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adv = 32;
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else
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adv = 64;
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speex_bits_advance(bits, adv);
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}
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return 0;
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}
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EXPORT int speex_std_mode_request_handler(SpeexBits *bits, void *state, void *data)
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{
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spx_int32_t m;
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m = speex_bits_unpack_unsigned(bits, 4);
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speex_encoder_ctl(data, SPEEX_SET_MODE, &m);
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return 0;
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}
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EXPORT int speex_std_low_mode_request_handler(SpeexBits *bits, void *state, void *data)
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{
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spx_int32_t m;
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m = speex_bits_unpack_unsigned(bits, 4);
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speex_encoder_ctl(data, SPEEX_SET_LOW_MODE, &m);
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return 0;
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}
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EXPORT int speex_std_high_mode_request_handler(SpeexBits *bits, void *state, void *data)
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{
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spx_int32_t m;
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m = speex_bits_unpack_unsigned(bits, 4);
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speex_encoder_ctl(data, SPEEX_SET_HIGH_MODE, &m);
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return 0;
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}
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#ifndef DISABLE_VBR
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EXPORT int speex_std_vbr_request_handler(SpeexBits *bits, void *state, void *data)
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{
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spx_int32_t vbr;
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vbr = speex_bits_unpack_unsigned(bits, 1);
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speex_encoder_ctl(data, SPEEX_SET_VBR, &vbr);
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return 0;
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}
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#endif /* #ifndef DISABLE_VBR */
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EXPORT int speex_std_enh_request_handler(SpeexBits *bits, void *state, void *data)
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{
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spx_int32_t enh;
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enh = speex_bits_unpack_unsigned(bits, 1);
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speex_decoder_ctl(data, SPEEX_SET_ENH, &enh);
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return 0;
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}
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#ifndef DISABLE_VBR
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EXPORT int speex_std_vbr_quality_request_handler(SpeexBits *bits, void *state, void *data)
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{
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float qual;
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qual = speex_bits_unpack_unsigned(bits, 4);
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speex_encoder_ctl(data, SPEEX_SET_VBR_QUALITY, &qual);
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return 0;
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}
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#endif /* #ifndef DISABLE_VBR */
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EXPORT int speex_std_char_handler(SpeexBits *bits, void *state, void *data)
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{
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unsigned char ch;
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ch = speex_bits_unpack_unsigned(bits, 8);
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_speex_putc(ch, data);
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/*printf("speex_std_char_handler ch=%x\n", ch);*/
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return 0;
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}
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/* Default handler for user callbacks: skip it */
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EXPORT int speex_default_user_handler(SpeexBits *bits, void *state, void *data)
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{
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int req_size = speex_bits_unpack_unsigned(bits, 4);
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speex_bits_advance(bits, 5+8*req_size);
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return 0;
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}
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