1 /* Copyright (C) 2002 Jean-Marc Valin*/
4 @brief Describes the different modes of the codec
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions
11 - Redistributions of source code must retain the above copyright
12 notice, this list of conditions and the following disclaimer.
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.
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.
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.
39 #include "speex/speex_bits.h"
40 #include "speex/speex_types.h"
46 /* Values allowed for *ctl() requests */
48 /** Set enhancement on/off (decoder only) */
49 #define SPEEX_SET_ENH 0
50 /** Get enhancement state (decoder only) */
51 #define SPEEX_GET_ENH 1
53 /*Would be SPEEX_SET_FRAME_SIZE, but it's (currently) invalid*/
54 /** Obtain frame size used by encoder/decoder */
55 #define SPEEX_GET_FRAME_SIZE 3
57 /** Set quality value */
58 #define SPEEX_SET_QUALITY 4
59 /** Get current quality setting */
60 /* #define SPEEX_GET_QUALITY 5 -- Doesn't make much sense, does it? */
62 /** Set sub-mode to use */
63 #define SPEEX_SET_MODE 6
64 /** Get current sub-mode in use */
65 #define SPEEX_GET_MODE 7
67 /** Set low-band sub-mode to use (wideband only)*/
68 #define SPEEX_SET_LOW_MODE 8
69 /** Get current low-band mode in use (wideband only)*/
70 #define SPEEX_GET_LOW_MODE 9
72 /** Set high-band sub-mode to use (wideband only)*/
73 #define SPEEX_SET_HIGH_MODE 10
74 /** Get current high-band mode in use (wideband only)*/
75 #define SPEEX_GET_HIGH_MODE 11
77 /** Set VBR on (1) or off (0) */
78 #define SPEEX_SET_VBR 12
79 /** Get VBR status (1 for on, 0 for off) */
80 #define SPEEX_GET_VBR 13
82 /** Set quality value for VBR encoding (0-10) */
83 #define SPEEX_SET_VBR_QUALITY 14
84 /** Get current quality value for VBR encoding (0-10) */
85 #define SPEEX_GET_VBR_QUALITY 15
87 /** Set complexity of the encoder (0-10) */
88 #define SPEEX_SET_COMPLEXITY 16
89 /** Get current complexity of the encoder (0-10) */
90 #define SPEEX_GET_COMPLEXITY 17
92 /** Set bit-rate used by the encoder (or lower) */
93 #define SPEEX_SET_BITRATE 18
94 /** Get current bit-rate used by the encoder or decoder */
95 #define SPEEX_GET_BITRATE 19
97 /**Define a handler function for in-band Speex request*/
98 #define SPEEX_SET_HANDLER 20
100 /**Define a handler function for in-band user-defined request*/
101 #define SPEEX_SET_USER_HANDLER 22
103 /** Set sampling rate used in bit-rate computation */
104 #define SPEEX_SET_SAMPLING_RATE 24
105 /** Get sampling rate used in bit-rate computation */
106 #define SPEEX_GET_SAMPLING_RATE 25
108 /** Reset the encoder/decoder memories to zero*/
109 #define SPEEX_RESET_STATE 26
111 /** Get VBR info (mostly used internally) */
112 #define SPEEX_GET_RELATIVE_QUALITY 29
114 /** Set VAD status (1 for on, 0 for off) */
115 #define SPEEX_SET_VAD 30
117 /** Get VAD status (1 for on, 0 for off) */
118 #define SPEEX_GET_VAD 31
120 /** Set Average Bit-Rate (ABR) to n bits per seconds */
121 #define SPEEX_SET_ABR 32
122 /** Get Average Bit-Rate (ABR) setting (in bps) */
123 #define SPEEX_GET_ABR 33
125 /** Set DTX status (1 for on, 0 for off) */
126 #define SPEEX_SET_DTX 34
127 /** Get DTX status (1 for on, 0 for off) */
128 #define SPEEX_GET_DTX 35
130 /** Set submode encoding in each frame (1 for yes, 0 for no, setting to no breaks the standard) */
131 #define SPEEX_SET_SUBMODE_ENCODING 36
133 #define SPEEX_GET_SUBMODE_ENCODING 37
135 /*#define SPEEX_SET_LOOKAHEAD 38*/
136 /** Returns the lookahead used by Speex */
137 #define SPEEX_GET_LOOKAHEAD 39
139 /** Sets tuning for packet-loss concealment (expected loss rate) */
140 #define SPEEX_SET_PLC_TUNING 40
141 /** Gets tuning for PLC */
142 #define SPEEX_GET_PLC_TUNING 41
144 /* Used internally, not to be used in applications */
145 /** Used internally*/
146 #define SPEEX_GET_PI_GAIN 100
147 /** Used internally*/
148 #define SPEEX_GET_EXC 101
149 /** Used internally*/
150 #define SPEEX_GET_INNOV 102
151 /** Used internally*/
152 #define SPEEX_GET_DTX_STATUS 103
155 /* Preserving compatibility:*/
156 /** Equivalent to SPEEX_SET_ENH */
157 #define SPEEX_SET_PF 0
158 /** Equivalent to SPEEX_GET_ENH */
159 #define SPEEX_GET_PF 1
164 /* Values allowed for mode queries */
165 /** Query the frame size of a mode */
166 #define SPEEX_MODE_FRAME_SIZE 0
168 /** Query the size of an encoded frame for a particular sub-mode */
169 #define SPEEX_SUBMODE_BITS_PER_FRAME 1
173 #define SPEEX_LIB_GET_MAJOR_VERSION 1
174 #define SPEEX_LIB_GET_MINOR_VERSION 3
175 #define SPEEX_LIB_GET_MICRO_VERSION 5
176 #define SPEEX_LIB_GET_EXTRA_VERSION 7
177 #define SPEEX_LIB_GET_VERSION_STRING 9
179 /*#define SPEEX_LIB_SET_ALLOC_FUNC 10
180 #define SPEEX_LIB_GET_ALLOC_FUNC 11
181 #define SPEEX_LIB_SET_FREE_FUNC 12
182 #define SPEEX_LIB_GET_FREE_FUNC 13
184 #define SPEEX_LIB_SET_WARNING_FUNC 14
185 #define SPEEX_LIB_GET_WARNING_FUNC 15
186 #define SPEEX_LIB_SET_ERROR_FUNC 16
187 #define SPEEX_LIB_GET_ERROR_FUNC 17
190 /** Number of defined modes in Speex */
191 #define SPEEX_NB_MODES 3
193 /** modeID for the defined narrowband mode */
194 #define SPEEX_MODEID_NB 0
196 /** modeID for the defined wideband mode */
197 #define SPEEX_MODEID_WB 1
199 /** modeID for the defined ultra-wideband mode */
200 #define SPEEX_MODEID_UWB 2
203 /** modeID for the Epic 48K mode */
204 #define SPEEX_MODEID_NB_48K 1000
210 /* Prototypes for mode function pointers */
212 /** Encoder state initialization function */
213 typedef void *(*encoder_init_func)(const struct SpeexMode *mode);
215 /** Encoder state destruction function */
216 typedef void (*encoder_destroy_func)(void *st);
218 /** Main encoding function */
219 typedef int (*encode_func)(void *state, void *in, SpeexBits *bits);
221 /** Function for controlling the encoder options */
222 typedef int (*encoder_ctl_func)(void *state, int request, void *ptr);
224 /** Decoder state initialization function */
225 typedef void *(*decoder_init_func)(const struct SpeexMode *mode);
227 /** Decoder state destruction function */
228 typedef void (*decoder_destroy_func)(void *st);
230 /** Main decoding function */
231 typedef int (*decode_func)(void *state, SpeexBits *bits, void *out);
233 /** Function for controlling the decoder options */
234 typedef int (*decoder_ctl_func)(void *state, int request, void *ptr);
237 /** Query function for a mode */
238 typedef int (*mode_query_func)(const void *mode, int request, void *ptr);
240 /** Struct defining a Speex mode */
241 typedef struct SpeexMode {
242 /** Pointer to the low-level mode data */
245 /** Pointer to the mode query function */
246 mode_query_func query;
248 /** The name of the mode (you should not rely on this to identify the mode)*/
249 const char *modeName;
254 /**Version number of the bitstream (incremented every time we break
255 bitstream compatibility*/
256 int bitstream_version;
258 /** Pointer to encoder initialization function */
259 encoder_init_func enc_init;
261 /** Pointer to encoder destruction function */
262 encoder_destroy_func enc_destroy;
264 /** Pointer to frame encoding function */
267 /** Pointer to decoder initialization function */
268 decoder_init_func dec_init;
270 /** Pointer to decoder destruction function */
271 decoder_destroy_func dec_destroy;
273 /** Pointer to frame decoding function */
276 /** ioctl-like requests for encoder */
277 encoder_ctl_func enc_ctl;
279 /** ioctl-like requests for decoder */
280 decoder_ctl_func dec_ctl;
285 * Returns a handle to a newly created Speex encoder state structure. For now,
286 * the "mode" argument can be &nb_mode or &wb_mode . In the future, more modes
287 * may be added. Note that for now if you have more than one channels to
288 * encode, you need one state per channel.
290 * @param mode The mode to use (either speex_nb_mode or speex_wb.mode)
291 * @return A newly created encoder
293 void *speex_encoder_init(const SpeexMode *mode);
295 /** Frees all resources associated to an existing Speex encoder state.
296 * @param state Encoder state to be destroyed */
297 void speex_encoder_destroy(void *state);
299 /** Uses an existing encoder state to encode one frame of speech pointed to by
300 "in". The encoded bit-stream is saved in "bits".
301 @param state Encoder state
302 @param in Frame that will be encoded with a +-2^15 range
303 @param bits Bit-stream where the data will be written
305 int speex_encode(void *state, float *in, SpeexBits *bits);
307 /** Uses an existing encoder state to encode one frame of speech pointed to by
308 "in". The encoded bit-stream is saved in "bits".
309 @param state Encoder state
310 @param in Frame that will be encoded with a +-2^15 range
311 @param bits Bit-stream where the data will be written
313 int speex_encode_int(void *state, spx_int16_t *in, SpeexBits *bits);
315 /** Used like the ioctl function to control the encoder parameters
317 * @param state Encoder state
318 * @param request ioctl-type request (one of the SPEEX_* macros)
319 * @param ptr Data exchanged to-from function
320 * @return 0 if frame needs not be transmitted (DTX only), 1 otherwise
322 int speex_encoder_ctl(void *state, int request, void *ptr);
325 /** Returns a handle to a newly created decoder state structure. For now,
326 * the mode argument can be &nb_mode or &wb_mode . In the future, more modes
327 * may be added. Note that for now if you have more than one channels to
328 * decode, you need one state per channel.
330 * @param mode Speex mode (one of speex_nb_mode or speex_wb_mode)
331 * @return A newly created decoder state
333 void *speex_decoder_init(const SpeexMode *mode);
335 /** Frees all resources associated to an existing decoder state.
337 * @param state State to be destroyed
339 void speex_decoder_destroy(void *state);
341 /** Uses an existing decoder state to decode one frame of speech from
342 * bit-stream bits. The output speech is saved written to out.
344 * @param state Decoder state
345 * @param bits Bit-stream from which to decode the frame (NULL if the packet was lost)
346 * @param out Where to write the decoded frame
347 * @return return status (0 for no error, -1 for end of stream, -2 other)
349 int speex_decode(void *state, SpeexBits *bits, float *out);
351 /** Uses an existing decoder state to decode one frame of speech from
352 * bit-stream bits. The output speech is saved written to out.
354 * @param state Decoder state
355 * @param bits Bit-stream from which to decode the frame (NULL if the packet was lost)
356 * @param out Where to write the decoded frame
357 * @return return status (0 for no error, -1 for end of stream, -2 other)
359 int speex_decode_int(void *state, SpeexBits *bits, spx_int16_t *out);
361 /** Used like the ioctl function to control the encoder parameters
363 * @param state Decoder state
364 * @param request ioctl-type request (one of the SPEEX_* macros)
365 * @param ptr Data exchanged to-from function
366 * @return 0 for no error, 1 if a terminator is reached, 2 for another error
368 int speex_decoder_ctl(void *state, int request, void *ptr);
371 /** Query function for mode information
373 * @param mode Speex mode
374 * @param request ioctl-type request (one of the SPEEX_* macros)
375 * @param ptr Data exchanged to-from function
377 int speex_mode_query(const SpeexMode *mode, int request, void *ptr);
379 /** Functions for controlling the behavior of libspeex
380 * @param request ioctl-type request (one of the SPEEX_LIB_* macros)
381 * @param ptr Data exchanged to-from function
383 int speex_lib_ctl(int request, void *ptr);
385 /** Default narrowband mode */
386 extern const SpeexMode speex_nb_mode;
388 /** Default wideband mode */
389 extern const SpeexMode speex_wb_mode;
391 /** Default "ultra-wideband" mode */
392 extern const SpeexMode speex_uwb_mode;
395 /** 4.8 kbps narrowband mode */
396 extern const SpeexMode speex_nb_48k_mode;
399 /** List of all modes available */
400 extern const SpeexMode * const speex_mode_list[SPEEX_NB_MODES];
402 /** Obtain one of the modes available */
403 const SpeexMode * speex_lib_get_mode (int mode);