speex_callbacks.c revision 98913fed6520d8849fb2e246be943e04474aefa4 
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
43EXPORT 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
75EXPORT 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
83EXPORT 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
91EXPORT 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
100EXPORT 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
109EXPORT 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
118EXPORT 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
127EXPORT 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 */
139EXPORT 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