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| 1 /* Copyright (C) 2002 Jean-Marc Valin |
| 2 File speex_callbacks.c |
| 3 Callback handling and in-band signalling |
| 4 |
| 5 |
| 6 Redistribution and use in source and binary forms, with or without |
| 7 modification, are permitted provided that the following conditions |
| 8 are met: |
| 9 |
| 10 - Redistributions of source code must retain the above copyright |
| 11 notice, this list of conditions and the following disclaimer. |
| 12 |
| 13 - Redistributions in binary form must reproduce the above copyright |
| 14 notice, this list of conditions and the following disclaimer in the |
| 15 documentation and/or other materials provided with the distribution. |
| 16 |
| 17 - Neither the name of the Xiph.org Foundation nor the names of its |
| 18 contributors may be used to endorse or promote products derived from |
| 19 this software without specific prior written permission. |
| 20 |
| 21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 22 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 23 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 24 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
| 25 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 26 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 27 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 28 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 29 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 30 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 31 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 |
| 33 */ |
| 34 |
| 35 #ifdef HAVE_CONFIG_H |
| 36 #include "config.h" |
| 37 #endif |
| 38 |
| 39 #include <speex/speex_callbacks.h> |
| 40 #include "arch.h" |
| 41 #include "os_support.h" |
| 42 |
| 43 EXPORT int speex_inband_handler(SpeexBits *bits, SpeexCallback *callback_list, v
oid *state) |
| 44 { |
| 45 int id; |
| 46 SpeexCallback *callback; |
| 47 /*speex_bits_advance(bits, 5);*/ |
| 48 id=speex_bits_unpack_unsigned(bits, 4); |
| 49 callback = callback_list+id; |
| 50 |
| 51 if (callback->func) |
| 52 { |
| 53 return callback->func(bits, state, callback->data); |
| 54 } else |
| 55 /*If callback is not registered, skip the right number of bits*/ |
| 56 { |
| 57 int adv; |
| 58 if (id<2) |
| 59 adv = 1; |
| 60 else if (id<8) |
| 61 adv = 4; |
| 62 else if (id<10) |
| 63 adv = 8; |
| 64 else if (id<12) |
| 65 adv = 16; |
| 66 else if (id<14) |
| 67 adv = 32; |
| 68 else |
| 69 adv = 64; |
| 70 speex_bits_advance(bits, adv); |
| 71 } |
| 72 return 0; |
| 73 } |
| 74 |
| 75 EXPORT int speex_std_mode_request_handler(SpeexBits *bits, void *state, void *da
ta) |
| 76 { |
| 77 spx_int32_t m; |
| 78 m = speex_bits_unpack_unsigned(bits, 4); |
| 79 speex_encoder_ctl(data, SPEEX_SET_MODE, &m); |
| 80 return 0; |
| 81 } |
| 82 |
| 83 EXPORT int speex_std_low_mode_request_handler(SpeexBits *bits, void *state, void
*data) |
| 84 { |
| 85 spx_int32_t m; |
| 86 m = speex_bits_unpack_unsigned(bits, 4); |
| 87 speex_encoder_ctl(data, SPEEX_SET_LOW_MODE, &m); |
| 88 return 0; |
| 89 } |
| 90 |
| 91 EXPORT int speex_std_high_mode_request_handler(SpeexBits *bits, void *state, voi
d *data) |
| 92 { |
| 93 spx_int32_t m; |
| 94 m = speex_bits_unpack_unsigned(bits, 4); |
| 95 speex_encoder_ctl(data, SPEEX_SET_HIGH_MODE, &m); |
| 96 return 0; |
| 97 } |
| 98 |
| 99 #ifndef DISABLE_VBR |
| 100 EXPORT int speex_std_vbr_request_handler(SpeexBits *bits, void *state, void *dat
a) |
| 101 { |
| 102 spx_int32_t vbr; |
| 103 vbr = speex_bits_unpack_unsigned(bits, 1); |
| 104 speex_encoder_ctl(data, SPEEX_SET_VBR, &vbr); |
| 105 return 0; |
| 106 } |
| 107 #endif /* #ifndef DISABLE_VBR */ |
| 108 |
| 109 EXPORT int speex_std_enh_request_handler(SpeexBits *bits, void *state, void *dat
a) |
| 110 { |
| 111 spx_int32_t enh; |
| 112 enh = speex_bits_unpack_unsigned(bits, 1); |
| 113 speex_decoder_ctl(data, SPEEX_SET_ENH, &enh); |
| 114 return 0; |
| 115 } |
| 116 |
| 117 #ifndef DISABLE_VBR |
| 118 EXPORT int speex_std_vbr_quality_request_handler(SpeexBits *bits, void *state, v
oid *data) |
| 119 { |
| 120 float qual; |
| 121 qual = speex_bits_unpack_unsigned(bits, 4); |
| 122 speex_encoder_ctl(data, SPEEX_SET_VBR_QUALITY, &qual); |
| 123 return 0; |
| 124 } |
| 125 #endif /* #ifndef DISABLE_VBR */ |
| 126 |
| 127 EXPORT int speex_std_char_handler(SpeexBits *bits, void *state, void *data) |
| 128 { |
| 129 unsigned char ch; |
| 130 ch = speex_bits_unpack_unsigned(bits, 8); |
| 131 _speex_putc(ch, data); |
| 132 /*printf("speex_std_char_handler ch=%x\n", ch);*/ |
| 133 return 0; |
| 134 } |
| 135 |
| 136 |
| 137 |
| 138 /* Default handler for user callbacks: skip it */ |
| 139 EXPORT int speex_default_user_handler(SpeexBits *bits, void *state, void *data) |
| 140 { |
| 141 int req_size = speex_bits_unpack_unsigned(bits, 4); |
| 142 speex_bits_advance(bits, 5+8*req_size); |
| 143 return 0; |
| 144 } |
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