apps/codecs/libspeex/speex_callbacks.c

   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-speex.h"
  37 #endif
  38
  39 #include "speex/speex_callbacks.h"
  40 #include "arch.h"
  41 #include "os_support.h"
  42
  43 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
  75 int speex_std_mode_request_handler(SpeexBits *bits, void *state, void *data)
  76 {
  77    (void)state;
  78    spx_int32_t m;
  79    m = speex_bits_unpack_unsigned(bits, 4);
  80    speex_encoder_ctl(data, SPEEX_SET_MODE, &m);
  81    return 0;
  82 }
  83
  84 int speex_std_low_mode_request_handler(SpeexBits *bits, void *state, void *data)
  85 {
  86    (void)state;
  87    spx_int32_t m;
  88    m = speex_bits_unpack_unsigned(bits, 4);
  89    speex_encoder_ctl(data, SPEEX_SET_LOW_MODE, &m);
  90    return 0;
  91 }
  92
  93 int speex_std_high_mode_request_handler(SpeexBits *bits, void *state, void *data)
  94 {
  95    (void)state;
  96    spx_int32_t m;
  97    m = speex_bits_unpack_unsigned(bits, 4);
  98    speex_encoder_ctl(data, SPEEX_SET_HIGH_MODE, &m);
  99    return 0;
 100 }
 101
 102 #ifndef DISABLE_VBR
 103 int speex_std_vbr_request_handler(SpeexBits *bits, void *state, void *data)
 104 {
 105    (void)state;
 106    spx_int32_t vbr;
 107    vbr = speex_bits_unpack_unsigned(bits, 1);
 108    speex_encoder_ctl(data, SPEEX_SET_VBR, &vbr);
 109    return 0;
 110 }
 111 #endif /* #ifndef DISABLE_VBR */
 112
 113 int speex_std_enh_request_handler(SpeexBits *bits, void *state, void *data)
 114 {
 115    (void)state;
 116    spx_int32_t enh;
 117    enh = speex_bits_unpack_unsigned(bits, 1);
 118    speex_decoder_ctl(data, SPEEX_SET_ENH, &enh);
 119    return 0;
 120 }
 121
 122 #ifndef DISABLE_VBR
 123 int speex_std_vbr_quality_request_handler(SpeexBits *bits, void *state, void *data)
 124 {
 125    (void)state;
 126    float qual;
 127    qual = speex_bits_unpack_unsigned(bits, 4);
 128    speex_encoder_ctl(data, SPEEX_SET_VBR_QUALITY, &qual);
 129    return 0;
 130 }
 131 #endif /* #ifndef DISABLE_VBR */
 132
 133 int speex_std_char_handler(SpeexBits *bits, void *state, void *data)
 134 {
 135    (void)state;
 136    unsigned char ch;
 137    ch = speex_bits_unpack_unsigned(bits, 8);
 138    _speex_putc(ch, data);
 139    /*printf("speex_std_char_handler ch=%x\n", ch);*/
 140    return 0;
 141 }
 142
 143 /* Default handler for user callbacks: skip it */
 144 int speex_default_user_handler(SpeexBits *bits, void *state, void *data)
 145 {
 146    (void)state;
 147    (void)data;
 148    int req_size = speex_bits_unpack_unsigned(bits, 4);
 149    speex_bits_advance(bits, 5+8*req_size);
 150    return 0;
 151 }