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
speex_inband_handler(SpeexBits * bits,SpeexCallback * callback_list,void * state)43 EXPORT int speex_inband_handler(SpeexBits *bits, SpeexCallback *callback_list, void *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
speex_std_mode_request_handler(SpeexBits * bits,void * state,void * data)75 EXPORT int speex_std_mode_request_handler(SpeexBits *bits, void *state, void *data)
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
speex_std_low_mode_request_handler(SpeexBits * bits,void * state,void * data)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
speex_std_high_mode_request_handler(SpeexBits * bits,void * state,void * data)91 EXPORT int speex_std_high_mode_request_handler(SpeexBits *bits, void *state, void *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
speex_std_vbr_request_handler(SpeexBits * bits,void * state,void * data)100 EXPORT int speex_std_vbr_request_handler(SpeexBits *bits, void *state, void *data)
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
speex_std_enh_request_handler(SpeexBits * bits,void * state,void * data)109 EXPORT int speex_std_enh_request_handler(SpeexBits *bits, void *state, void *data)
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
speex_std_vbr_quality_request_handler(SpeexBits * bits,void * state,void * data)118 EXPORT int speex_std_vbr_quality_request_handler(SpeexBits *bits, void *state, void *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
speex_std_char_handler(SpeexBits * bits,void * state,void * data)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 */
speex_default_user_handler(SpeexBits * bits,void * state,void * data)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 }
145