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| 1 /* Copyright (C) 2002 Jean-Marc Valin*/ |
| 2 /** |
| 3 @file speex_callbacks.h |
| 4 @brief Describes callback handling and in-band signalling |
| 5 */ |
| 6 /* |
| 7 Redistribution and use in source and binary forms, with or without |
| 8 modification, are permitted provided that the following conditions |
| 9 are met: |
| 10 |
| 11 - Redistributions of source code must retain the above copyright |
| 12 notice, this list of conditions and the following disclaimer. |
| 13 |
| 14 - Redistributions in binary form must reproduce the above copyright |
| 15 notice, this list of conditions and the following disclaimer in the |
| 16 documentation and/or other materials provided with the distribution. |
| 17 |
| 18 - Neither the name of the Xiph.org Foundation nor the names of its |
| 19 contributors may be used to endorse or promote products derived from |
| 20 this software without specific prior written permission. |
| 21 |
| 22 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 23 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 24 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 25 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
| 26 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 27 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 28 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 29 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 30 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 31 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 32 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 33 |
| 34 */ |
| 35 |
| 36 #ifndef SPEEX_CALLBACKS_H |
| 37 #define SPEEX_CALLBACKS_H |
| 38 /** @defgroup SpeexCallbacks Various definitions for Speex callbacks supported b
y the decoder. |
| 39 * @{ |
| 40 */ |
| 41 |
| 42 #include "speex.h" |
| 43 |
| 44 #ifdef __cplusplus |
| 45 extern "C" { |
| 46 #endif |
| 47 |
| 48 /** Total number of callbacks */ |
| 49 #define SPEEX_MAX_CALLBACKS 16 |
| 50 |
| 51 /* Describes all the in-band requests */ |
| 52 |
| 53 /*These are 1-bit requests*/ |
| 54 /** Request for perceptual enhancement (1 for on, 0 for off) */ |
| 55 #define SPEEX_INBAND_ENH_REQUEST 0 |
| 56 /** Reserved */ |
| 57 #define SPEEX_INBAND_RESERVED1 1 |
| 58 |
| 59 /*These are 4-bit requests*/ |
| 60 /** Request for a mode change */ |
| 61 #define SPEEX_INBAND_MODE_REQUEST 2 |
| 62 /** Request for a low mode change */ |
| 63 #define SPEEX_INBAND_LOW_MODE_REQUEST 3 |
| 64 /** Request for a high mode change */ |
| 65 #define SPEEX_INBAND_HIGH_MODE_REQUEST 4 |
| 66 /** Request for VBR (1 on, 0 off) */ |
| 67 #define SPEEX_INBAND_VBR_QUALITY_REQUEST 5 |
| 68 /** Request to be sent acknowledge */ |
| 69 #define SPEEX_INBAND_ACKNOWLEDGE_REQUEST 6 |
| 70 /** Request for VBR (1 for on, 0 for off) */ |
| 71 #define SPEEX_INBAND_VBR_REQUEST 7 |
| 72 |
| 73 /*These are 8-bit requests*/ |
| 74 /** Send a character in-band */ |
| 75 #define SPEEX_INBAND_CHAR 8 |
| 76 /** Intensity stereo information */ |
| 77 #define SPEEX_INBAND_STEREO 9 |
| 78 |
| 79 /*These are 16-bit requests*/ |
| 80 /** Transmit max bit-rate allowed */ |
| 81 #define SPEEX_INBAND_MAX_BITRATE 10 |
| 82 |
| 83 /*These are 32-bit requests*/ |
| 84 /** Acknowledge packet reception */ |
| 85 #define SPEEX_INBAND_ACKNOWLEDGE 12 |
| 86 |
| 87 /** Callback function type */ |
| 88 typedef int (*speex_callback_func)(SpeexBits *bits, void *state, void *data); |
| 89 |
| 90 /** Callback information */ |
| 91 typedef struct SpeexCallback { |
| 92 int callback_id; /**< ID associated to the callback */ |
| 93 speex_callback_func func; /**< Callback handler function */ |
| 94 void *data; /**< Data that will be sent to the handler */ |
| 95 void *reserved1; /**< Reserved for future use */ |
| 96 int reserved2; /**< Reserved for future use */ |
| 97 } SpeexCallback; |
| 98 |
| 99 /** Handle in-band request */ |
| 100 int speex_inband_handler(SpeexBits *bits, SpeexCallback *callback_list, void *st
ate); |
| 101 |
| 102 /** Standard handler for mode request (change mode, no questions asked) */ |
| 103 int speex_std_mode_request_handler(SpeexBits *bits, void *state, void *data); |
| 104 |
| 105 /** Standard handler for high mode request (change high mode, no questions asked
) */ |
| 106 int speex_std_high_mode_request_handler(SpeexBits *bits, void *state, void *data
); |
| 107 |
| 108 /** Standard handler for in-band characters (write to stderr) */ |
| 109 int speex_std_char_handler(SpeexBits *bits, void *state, void *data); |
| 110 |
| 111 /** Default handler for user-defined requests: in this case, just ignore */ |
| 112 int speex_default_user_handler(SpeexBits *bits, void *state, void *data); |
| 113 |
| 114 |
| 115 |
| 116 /** Standard handler for low mode request (change low mode, no questions asked)
*/ |
| 117 int speex_std_low_mode_request_handler(SpeexBits *bits, void *state, void *data)
; |
| 118 |
| 119 /** Standard handler for VBR request (Set VBR, no questions asked) */ |
| 120 int speex_std_vbr_request_handler(SpeexBits *bits, void *state, void *data); |
| 121 |
| 122 /** Standard handler for enhancer request (Turn enhancer on/off, no questions as
ked) */ |
| 123 int speex_std_enh_request_handler(SpeexBits *bits, void *state, void *data); |
| 124 |
| 125 /** Standard handler for VBR quality request (Set VBR quality, no questions aske
d) */ |
| 126 int speex_std_vbr_quality_request_handler(SpeexBits *bits, void *state, void *da
ta); |
| 127 |
| 128 |
| 129 #ifdef __cplusplus |
| 130 } |
| 131 #endif |
| 132 |
| 133 /** @} */ |
| 134 #endif |
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