speex_header.h Source File

00001 /* Copyright (C) 2002 Jean-Marc Valin */
00006 /*
00007    Redistribution and use in source and binary forms, with or without
00008    modification, are permitted provided that the following conditions
00009    are met:
00010    
00011    - Redistributions of source code must retain the above copyright
00012    notice, this list of conditions and the following disclaimer.
00013    
00014    - Redistributions in binary form must reproduce the above copyright
00015    notice, this list of conditions and the following disclaimer in the
00016    documentation and/or other materials provided with the distribution.
00017    
00018    - Neither the name of the Xiph.org Foundation nor the names of its
00019    contributors may be used to endorse or promote products derived from
00020    this software without specific prior written permission.
00021    
00022    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00023    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00024    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
00025    A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
00026    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00027    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00028    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00029    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00030    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00031    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00032    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00033 
00034 */
00035 
00036 
00037 #ifndef SPEEX_HEADER_H
00038 #define SPEEX_HEADER_H
00039 
00040 #ifdef __cplusplus
00041 extern "C" {
00042 #endif
00043 
00044 struct SpeexMode;
00045 
00047 #define SPEEX_HEADER_VERSION_LENGTH 20
00048 
00050 typedef struct SpeexHeader {
00051    char speex_string[8];       
00052    char speex_version[SPEEX_HEADER_VERSION_LENGTH]; 
00053    int speex_version_id;       
00054    int header_size;            
00055    int rate;                   
00056    int mode;                   
00057    int mode_bitstream_version; 
00058    int nb_channels;            
00059    int bitrate;                
00060    int frame_size;             
00061    int vbr;                    
00062    int frames_per_packet;      
00063    int extra_headers;          
00064    int reserved1;              
00065    int reserved2;              
00066 } SpeexHeader;
00067 
00069 void speex_init_header(SpeexHeader *header, int rate, int nb_channels, struct SpeexMode *m);
00070 
00072 char *speex_header_to_packet(SpeexHeader *header, int *size);
00073 
00075 SpeexHeader *speex_packet_to_header(char *packet, int size);
00076 
00077 #ifdef __cplusplus
00078 }
00079 #endif
00080 
00081 
00082 #endif