| /* 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.h" |
| #endif |
| |
| #include <speex/speex_callbacks.h> |
| #include "arch.h" |
| #include "os_support.h" |
| |
| EXPORT 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; |
| } |
| |
| EXPORT 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; |
| } |
| |
| EXPORT 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; |
| } |
| |
| EXPORT 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; |
| } |
| |
| #ifndef DISABLE_VBR |
| EXPORT 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; |
| } |
| #endif /* #ifndef DISABLE_VBR */ |
| |
| EXPORT 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; |
| } |
| |
| #ifndef DISABLE_VBR |
| EXPORT 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; |
| } |
| #endif /* #ifndef DISABLE_VBR */ |
| |
| EXPORT 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 */ |
| EXPORT 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; |
| } |