speex.h
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上传日期:2014-04-03
资源大小:7248k
文件大小:13k
源码类别:
Windows CE
开发平台:
C/C++
- /* Copyright (C) 2002 Jean-Marc Valin*/
- /**
- @file speex.h
- @brief Describes the different modes of the codec
- */
- /*
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
- - Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- - Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
- - Neither the name of the Xiph.org Foundation nor the names of its
- contributors may be used to endorse or promote products derived from
- this software without specific prior written permission.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #ifndef SPEEX_H
- #define SPEEX_H
- #include "speex/speex_bits.h"
- #include "speex/speex_types.h"
- #ifdef __cplusplus
- extern "C" {
- #endif
- /* Values allowed for *ctl() requests */
- /** Set enhancement on/off (decoder only) */
- #define SPEEX_SET_ENH 0
- /** Get enhancement state (decoder only) */
- #define SPEEX_GET_ENH 1
- /*Would be SPEEX_SET_FRAME_SIZE, but it's (currently) invalid*/
- /** Obtain frame size used by encoder/decoder */
- #define SPEEX_GET_FRAME_SIZE 3
- /** Set quality value */
- #define SPEEX_SET_QUALITY 4
- /** Get current quality setting */
- /* #define SPEEX_GET_QUALITY 5 -- Doesn't make much sense, does it? */
- /** Set sub-mode to use */
- #define SPEEX_SET_MODE 6
- /** Get current sub-mode in use */
- #define SPEEX_GET_MODE 7
- /** Set low-band sub-mode to use (wideband only)*/
- #define SPEEX_SET_LOW_MODE 8
- /** Get current low-band mode in use (wideband only)*/
- #define SPEEX_GET_LOW_MODE 9
- /** Set high-band sub-mode to use (wideband only)*/
- #define SPEEX_SET_HIGH_MODE 10
- /** Get current high-band mode in use (wideband only)*/
- #define SPEEX_GET_HIGH_MODE 11
- /** Set VBR on (1) or off (0) */
- #define SPEEX_SET_VBR 12
- /** Get VBR status (1 for on, 0 for off) */
- #define SPEEX_GET_VBR 13
- /** Set quality value for VBR encoding (0-10) */
- #define SPEEX_SET_VBR_QUALITY 14
- /** Get current quality value for VBR encoding (0-10) */
- #define SPEEX_GET_VBR_QUALITY 15
- /** Set complexity of the encoder (0-10) */
- #define SPEEX_SET_COMPLEXITY 16
- /** Get current complexity of the encoder (0-10) */
- #define SPEEX_GET_COMPLEXITY 17
- /** Set bit-rate used by the encoder (or lower) */
- #define SPEEX_SET_BITRATE 18
- /** Get current bit-rate used by the encoder or decoder */
- #define SPEEX_GET_BITRATE 19
- /**Define a handler function for in-band Speex request*/
- #define SPEEX_SET_HANDLER 20
- /**Define a handler function for in-band user-defined request*/
- #define SPEEX_SET_USER_HANDLER 22
- /** Set sampling rate used in bit-rate computation */
- #define SPEEX_SET_SAMPLING_RATE 24
- /** Get sampling rate used in bit-rate computation */
- #define SPEEX_GET_SAMPLING_RATE 25
- /** Reset the encoder/decoder memories to zero*/
- #define SPEEX_RESET_STATE 26
- /** Get VBR info (mostly used internally) */
- #define SPEEX_GET_RELATIVE_QUALITY 29
- /** Set VAD status (1 for on, 0 for off) */
- #define SPEEX_SET_VAD 30
- /** Get VAD status (1 for on, 0 for off) */
- #define SPEEX_GET_VAD 31
- /** Set Average Bit-Rate (ABR) to n bits per seconds */
- #define SPEEX_SET_ABR 32
- /** Get Average Bit-Rate (ABR) setting (in bps) */
- #define SPEEX_GET_ABR 33
- /** Set DTX status (1 for on, 0 for off) */
- #define SPEEX_SET_DTX 34
- /** Get DTX status (1 for on, 0 for off) */
- #define SPEEX_GET_DTX 35
- /** Set submode encoding in each frame (1 for yes, 0 for no, setting to no breaks the standard) */
- #define SPEEX_SET_SUBMODE_ENCODING 36
- /** */
- #define SPEEX_GET_SUBMODE_ENCODING 37
- /*#define SPEEX_SET_LOOKAHEAD 38*/
- /** Returns the lookahead used by Speex */
- #define SPEEX_GET_LOOKAHEAD 39
- /** Sets tuning for packet-loss concealment (expected loss rate) */
- #define SPEEX_SET_PLC_TUNING 40
- /** Gets tuning for PLC */
- #define SPEEX_GET_PLC_TUNING 41
- /* Used internally, not to be used in applications */
- /** Used internally*/
- #define SPEEX_GET_PI_GAIN 100
- /** Used internally*/
- #define SPEEX_GET_EXC 101
- /** Used internally*/
- #define SPEEX_GET_INNOV 102
- /** Used internally*/
- #define SPEEX_GET_DTX_STATUS 103
- /* Preserving compatibility:*/
- /** Equivalent to SPEEX_SET_ENH */
- #define SPEEX_SET_PF 0
- /** Equivalent to SPEEX_GET_ENH */
- #define SPEEX_GET_PF 1
- /* Values allowed for mode queries */
- /** Query the frame size of a mode */
- #define SPEEX_MODE_FRAME_SIZE 0
- /** Query the size of an encoded frame for a particular sub-mode */
- #define SPEEX_SUBMODE_BITS_PER_FRAME 1
- #define SPEEX_LIB_GET_MAJOR_VERSION 1
- #define SPEEX_LIB_GET_MINOR_VERSION 3
- #define SPEEX_LIB_GET_MICRO_VERSION 5
- #define SPEEX_LIB_GET_EXTRA_VERSION 7
- #define SPEEX_LIB_GET_VERSION_STRING 9
- /*#define SPEEX_LIB_SET_ALLOC_FUNC 10
- #define SPEEX_LIB_GET_ALLOC_FUNC 11
- #define SPEEX_LIB_SET_FREE_FUNC 12
- #define SPEEX_LIB_GET_FREE_FUNC 13
- #define SPEEX_LIB_SET_WARNING_FUNC 14
- #define SPEEX_LIB_GET_WARNING_FUNC 15
- #define SPEEX_LIB_SET_ERROR_FUNC 16
- #define SPEEX_LIB_GET_ERROR_FUNC 17
- */
- /** Number of defined modes in Speex */
- #define SPEEX_NB_MODES 3
- /** modeID for the defined narrowband mode */
- #define SPEEX_MODEID_NB 0
- /** modeID for the defined wideband mode */
- #define SPEEX_MODEID_WB 1
- /** modeID for the defined ultra-wideband mode */
- #define SPEEX_MODEID_UWB 2
- #ifdef EPIC_48K
- /** modeID for the Epic 48K mode */
- #define SPEEX_MODEID_NB_48K 1000
- #endif
- struct SpeexMode;
- /* Prototypes for mode function pointers */
- /** Encoder state initialization function */
- typedef void *(*encoder_init_func)(const struct SpeexMode *mode);
- /** Encoder state destruction function */
- typedef void (*encoder_destroy_func)(void *st);
- /** Main encoding function */
- typedef int (*encode_func)(void *state, void *in, SpeexBits *bits);
- /** Function for controlling the encoder options */
- typedef int (*encoder_ctl_func)(void *state, int request, void *ptr);
- /** Decoder state initialization function */
- typedef void *(*decoder_init_func)(const struct SpeexMode *mode);
- /** Decoder state destruction function */
- typedef void (*decoder_destroy_func)(void *st);
- /** Main decoding function */
- typedef int (*decode_func)(void *state, SpeexBits *bits, void *out);
- /** Function for controlling the decoder options */
- typedef int (*decoder_ctl_func)(void *state, int request, void *ptr);
- /** Query function for a mode */
- typedef int (*mode_query_func)(const void *mode, int request, void *ptr);
- /** Struct defining a Speex mode */
- typedef struct SpeexMode {
- /** Pointer to the low-level mode data */
- const void *mode;
- /** Pointer to the mode query function */
- mode_query_func query;
- /** The name of the mode (you should not rely on this to identify the mode)*/
- const char *modeName;
- /**ID of the mode*/
- int modeID;
- /**Version number of the bitstream (incremented every time we break
- bitstream compatibility*/
- int bitstream_version;
- /** Pointer to encoder initialization function */
- encoder_init_func enc_init;
- /** Pointer to encoder destruction function */
- encoder_destroy_func enc_destroy;
- /** Pointer to frame encoding function */
- encode_func enc;
- /** Pointer to decoder initialization function */
- decoder_init_func dec_init;
- /** Pointer to decoder destruction function */
- decoder_destroy_func dec_destroy;
- /** Pointer to frame decoding function */
- decode_func dec;
- /** ioctl-like requests for encoder */
- encoder_ctl_func enc_ctl;
- /** ioctl-like requests for decoder */
- decoder_ctl_func dec_ctl;
- } SpeexMode;
- /**
- * Returns a handle to a newly created Speex encoder state structure. For now,
- * the "mode" argument can be &nb_mode or &wb_mode . In the future, more modes
- * may be added. Note that for now if you have more than one channels to
- * encode, you need one state per channel.
- *
- * @param mode The mode to use (either speex_nb_mode or speex_wb.mode)
- * @return A newly created encoder
- */
- void *speex_encoder_init(const SpeexMode *mode);
- /** Frees all resources associated to an existing Speex encoder state.
- * @param state Encoder state to be destroyed */
- void speex_encoder_destroy(void *state);
- /** Uses an existing encoder state to encode one frame of speech pointed to by
- "in". The encoded bit-stream is saved in "bits".
- @param state Encoder state
- @param in Frame that will be encoded with a +-2^15 range
- @param bits Bit-stream where the data will be written
- */
- int speex_encode(void *state, float *in, SpeexBits *bits);
- /** Uses an existing encoder state to encode one frame of speech pointed to by
- "in". The encoded bit-stream is saved in "bits".
- @param state Encoder state
- @param in Frame that will be encoded with a +-2^15 range
- @param bits Bit-stream where the data will be written
- */
- int speex_encode_int(void *state, spx_int16_t *in, SpeexBits *bits);
- /** Used like the ioctl function to control the encoder parameters
- *
- * @param state Encoder state
- * @param request ioctl-type request (one of the SPEEX_* macros)
- * @param ptr Data exchanged to-from function
- * @return 0 if frame needs not be transmitted (DTX only), 1 otherwise
- */
- int speex_encoder_ctl(void *state, int request, void *ptr);
- /** Returns a handle to a newly created decoder state structure. For now,
- * the mode argument can be &nb_mode or &wb_mode . In the future, more modes
- * may be added. Note that for now if you have more than one channels to
- * decode, you need one state per channel.
- *
- * @param mode Speex mode (one of speex_nb_mode or speex_wb_mode)
- * @return A newly created decoder state
- */
- void *speex_decoder_init(const SpeexMode *mode);
- /** Frees all resources associated to an existing decoder state.
- *
- * @param state State to be destroyed
- */
- void speex_decoder_destroy(void *state);
- /** Uses an existing decoder state to decode one frame of speech from
- * bit-stream bits. The output speech is saved written to out.
- *
- * @param state Decoder state
- * @param bits Bit-stream from which to decode the frame (NULL if the packet was lost)
- * @param out Where to write the decoded frame
- * @return return status (0 for no error, -1 for end of stream, -2 other)
- */
- int speex_decode(void *state, SpeexBits *bits, float *out);
- /** Uses an existing decoder state to decode one frame of speech from
- * bit-stream bits. The output speech is saved written to out.
- *
- * @param state Decoder state
- * @param bits Bit-stream from which to decode the frame (NULL if the packet was lost)
- * @param out Where to write the decoded frame
- * @return return status (0 for no error, -1 for end of stream, -2 other)
- */
- int speex_decode_int(void *state, SpeexBits *bits, spx_int16_t *out);
- /** Used like the ioctl function to control the encoder parameters
- *
- * @param state Decoder state
- * @param request ioctl-type request (one of the SPEEX_* macros)
- * @param ptr Data exchanged to-from function
- * @return 0 for no error, 1 if a terminator is reached, 2 for another error
- */
- int speex_decoder_ctl(void *state, int request, void *ptr);
- /** Query function for mode information
- *
- * @param mode Speex mode
- * @param request ioctl-type request (one of the SPEEX_* macros)
- * @param ptr Data exchanged to-from function
- */
- int speex_mode_query(const SpeexMode *mode, int request, void *ptr);
- /** Functions for controlling the behavior of libspeex
- * @param request ioctl-type request (one of the SPEEX_LIB_* macros)
- * @param ptr Data exchanged to-from function
- */
- int speex_lib_ctl(int request, void *ptr);
- /** Default narrowband mode */
- extern const SpeexMode speex_nb_mode;
- /** Default wideband mode */
- extern const SpeexMode speex_wb_mode;
- /** Default "ultra-wideband" mode */
- extern const SpeexMode speex_uwb_mode;
- #ifdef EPIC_48K
- /** 4.8 kbps narrowband mode */
- extern const SpeexMode speex_nb_48k_mode;
- #endif
- /** List of all modes available */
- extern const SpeexMode * const speex_mode_list[SPEEX_NB_MODES];
- /** Obtain one of the modes available */
- const SpeexMode * speex_lib_get_mode (int mode);
- #ifdef __cplusplus
- }
- #endif
- #endif