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_callbacks.h"
40 #include "misc.h"
41
speex_inband_handler(SpeexBits * bits,SpeexCallback * callback_list,void * state)42 int speex_inband_handler(SpeexBits *bits, SpeexCallback *callback_list, void *state)
43 {
44 int id;
45 SpeexCallback *callback;
46 /*speex_bits_advance(bits, 5);*/
47 id=speex_bits_unpack_unsigned(bits, 4);
48 callback = callback_list+id;
49
50 if (callback->func)
51 {
52 return callback->func(bits, state, callback->data);
53 } else
54 /*If callback is not registered, skip the right number of bits*/
55 {
56 int adv;
57 if (id<2)
58 adv = 1;
59 else if (id<8)
60 adv = 4;
61 else if (id<10)
62 adv = 8;
63 else if (id<12)
64 adv = 16;
65 else if (id<14)
66 adv = 32;
67 else
68 adv = 64;
69 speex_bits_advance(bits, adv);
70 }
71 return 0;
72 }
73
speex_std_mode_request_handler(SpeexBits * bits,void * state,void * data)74 int speex_std_mode_request_handler(SpeexBits *bits, void *state, void *data)
75 {
76 int m;
77 m = speex_bits_unpack_unsigned(bits, 4);
78 speex_encoder_ctl(data, SPEEX_SET_MODE, &m);
79 return 0;
80 }
81
speex_std_low_mode_request_handler(SpeexBits * bits,void * state,void * data)82 int speex_std_low_mode_request_handler(SpeexBits *bits, void *state, void *data)
83 {
84 int m;
85 m = speex_bits_unpack_unsigned(bits, 4);
86 speex_encoder_ctl(data, SPEEX_SET_LOW_MODE, &m);
87 return 0;
88 }
89
speex_std_high_mode_request_handler(SpeexBits * bits,void * state,void * data)90 int speex_std_high_mode_request_handler(SpeexBits *bits, void *state, void *data)
91 {
92 int m;
93 m = speex_bits_unpack_unsigned(bits, 4);
94 speex_encoder_ctl(data, SPEEX_SET_HIGH_MODE, &m);
95 return 0;
96 }
97
speex_std_vbr_request_handler(SpeexBits * bits,void * state,void * data)98 int speex_std_vbr_request_handler(SpeexBits *bits, void *state, void *data)
99 {
100 int vbr;
101 vbr = speex_bits_unpack_unsigned(bits, 1);
102 speex_encoder_ctl(data, SPEEX_SET_VBR, &vbr);
103 return 0;
104 }
105
speex_std_enh_request_handler(SpeexBits * bits,void * state,void * data)106 int speex_std_enh_request_handler(SpeexBits *bits, void *state, void *data)
107 {
108 int enh;
109 enh = speex_bits_unpack_unsigned(bits, 1);
110 speex_decoder_ctl(data, SPEEX_SET_ENH, &enh);
111 return 0;
112 }
113
speex_std_vbr_quality_request_handler(SpeexBits * bits,void * state,void * data)114 int speex_std_vbr_quality_request_handler(SpeexBits *bits, void *state, void *data)
115 {
116 int qual;
117 qual = speex_bits_unpack_unsigned(bits, 4);
118 speex_encoder_ctl(data, SPEEX_SET_VBR_QUALITY, &qual);
119 return 0;
120 }
121
122
speex_std_char_handler(SpeexBits * bits,void * state,void * data)123 int speex_std_char_handler(SpeexBits *bits, void *state, void *data)
124 {
125 unsigned char ch;
126 ch = speex_bits_unpack_unsigned(bits, 8);
127 _speex_putc(ch, data);
128 /*printf("speex_std_char_handler ch=%x\n", ch);*/
129 return 0;
130 }
131
132
133
134 /* Default handler for user callbacks: skip it */
speex_default_user_handler(SpeexBits * bits,void * state,void * data)135 int speex_default_user_handler(SpeexBits *bits, void *state, void *data)
136 {
137 int req_size = speex_bits_unpack_unsigned(bits, 4);
138 speex_bits_advance(bits, 5+8*req_size);
139 return 0;
140 }
141