+
−/*
+
− * OpenAL Bridge - a simple portable library for OpenAL interface
+
− * Copyright (c) 2009 Vittorio Giovara <vittorio.giovara@gmail.com>
+
− *
+
− * This program is free software; you can redistribute it and/or modify
+
− * it under the terms of the GNU General Public License as published by
+
− * the Free Software Foundation; version 2 of the License
+
− *
+
− * This program is distributed in the hope that it will be useful,
+
− * but WITHOUT ANY WARRANTY; without even the implied warranty of
+
− * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+
− * GNU General Public License for more details.
+
− *
+
− * You should have received a copy of the GNU General Public License
+
− * along with this program; if not, write to the Free Software
+
− * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+
− */
+
−
+
−#ifdef __CPLUSPLUS
+
−extern "C" {
+
−#endif 
+
−	
+
−#pragma once
+
−	
+
−#pragma pack(1)
+
−	typedef struct _WAV_header_t {
+
−		uint32_t ChunkID;
+
−		uint32_t ChunkSize;
+
−		uint32_t Format;
+
−		uint32_t Subchunk1ID;
+
−		uint32_t Subchunk1Size;
+
−		uint16_t AudioFormat;
+
−		uint16_t NumChannels;
+
−		uint32_t SampleRate;
+
−		uint32_t ByteRate;
+
−		uint16_t BlockAlign;
+
−		uint16_t BitsPerSample;
+
−		uint32_t Subchunk2ID;
+
−		uint32_t Subchunk2Size;
+
−	} WAV_header_t;
+
−#pragma pack()
+
−	
+
−	/*data types for ogg and vorbis*/
+
−#ifndef ogg_int64_t	
+
−#define ogg_int64_t int64_t
+
−#endif
+
−	
+
−	typedef struct {
+
−		unsigned char *data;
+
−		int storage;
+
−		int fill;
+
−		int returned;
+
−		
+
−		int unsynced;
+
−		int headerbytes;
+
−		int bodybytes;
+
−	} ogg_sync_state;
+
−	typedef struct vorbis_info{
+
−		int version;
+
−		int channels;
+
−		long rate;
+
−		
+
−		/* The below bitrate declarations are *hints*.
+
−		 Combinations of the three values carry the following implications:
+
−		 
+
−		 all three set to the same value:
+
−		 implies a fixed rate bitstream
+
−		 only nominal set:
+
−		 implies a VBR stream that averages the nominal bitrate.  No hard
+
−		 upper/lower limit
+
−		 upper and or lower set:
+
−		 implies a VBR bitstream that obeys the bitrate limits. nominal
+
−		 may also be set to give a nominal rate.
+
−		 none set:
+
−		 the coder does not care to speculate.
+
−		 */
+
−		
+
−		long bitrate_upper;
+
−		long bitrate_nominal;
+
−		long bitrate_lower;
+
−		long bitrate_window;
+
−		
+
−		void *codec_setup;
+
−	} vorbis_info;
+
−	typedef struct vorbis_comment{
+
−		/* unlimited user comment fields.  libvorbis writes 'libvorbis'
+
−		 whatever vendor is set to in encode */
+
−		char **user_comments;
+
−		int   *comment_lengths;
+
−		int    comments;
+
−		char  *vendor;
+
−		
+
−	} vorbis_comment;
+
−	typedef struct {
+
−		unsigned char   *body_data;    /* bytes from packet bodies */
+
−		long    body_storage;          /* storage elements allocated */
+
−		long    body_fill;             /* elements stored; fill mark */
+
−		long    body_returned;         /* elements of fill returned */
+
−		
+
−		
+
−		int     *lacing_vals;      /* The values that will go to the segment table */
+
−		ogg_int64_t *granule_vals; /* granulepos values for headers. Not compact
+
−		 this way, but it is simple coupled to the
+
−		 lacing fifo */
+
−		long    lacing_storage;
+
−		long    lacing_fill;
+
−		long    lacing_packet;
+
−		long    lacing_returned;
+
−		
+
−		unsigned char    header[282];      /* working space for header encode */
+
−		int              header_fill;
+
−		
+
−		int     e_o_s;          /* set when we have buffered the last packet in the
+
−		 logical bitstream */
+
−		int     b_o_s;          /* set after we've written the initial page
+
−		 of a logical bitstream */
+
−		long    serialno;
+
−		long    pageno;
+
−		ogg_int64_t  packetno;      /* sequence number for decode; the framing
+
−		 knows where there's a hole in the data,
+
−		 but we need coupling so that the codec
+
−		 (which is in a seperate abstraction
+
−		 layer) also knows about the gap */
+
−		ogg_int64_t   granulepos;
+
−		
+
−	} ogg_stream_state;
+
−	typedef struct vorbis_dsp_state{
+
−		int analysisp;
+
−		vorbis_info *vi;
+
−		
+
−		float **pcm;
+
−		float **pcmret;
+
−		int      pcm_storage;
+
−		int      pcm_current;
+
−		int      pcm_returned;
+
−		
+
−		int  preextrapolate;
+
−		int  eofflag;
+
−		
+
−		long lW;
+
−		long W;
+
−		long nW;
+
−		long centerW;
+
−		
+
−		ogg_int64_t granulepos;
+
−		ogg_int64_t sequence;
+
−		
+
−		ogg_int64_t glue_bits;
+
−		ogg_int64_t time_bits;
+
−		ogg_int64_t floor_bits;
+
−		ogg_int64_t res_bits;
+
−		
+
−		void       *backend_state;
+
−	} vorbis_dsp_state;
+
−	typedef struct {
+
−		long endbyte;
+
−		int  endbit;
+
−		
+
−		unsigned char *buffer;
+
−		unsigned char *ptr;
+
−		long storage;
+
−	} oggpack_buffer;
+
−	typedef struct vorbis_block{
+
−		/* necessary stream state for linking to the framing abstraction */
+
−		float  **pcm;       /* this is a pointer into local storage */
+
−		oggpack_buffer opb;
+
−		
+
−		long  lW;
+
−		long  W;
+
−		long  nW;
+
−		int   pcmend;
+
−		int   mode;
+
−		
+
−		int         eofflag;
+
−		ogg_int64_t granulepos;
+
−		ogg_int64_t sequence;
+
−		vorbis_dsp_state *vd; /* For read-only access of configuration */
+
−		
+
−		/* local storage to avoid remallocing; it's up to the mapping to
+
−		 structure it */
+
−		void               *localstore;
+
−		long                localtop;
+
−		long                localalloc;
+
−		long                totaluse;
+
−		struct alloc_chain *reap;
+
−		
+
−		/* bitmetrics for the frame */
+
−		long glue_bits;
+
−		long time_bits;
+
−		long floor_bits;
+
−		long res_bits;
+
−		
+
−		void *internal;
+
−		
+
−	} vorbis_block;
+
−	typedef struct {
+
−		size_t (*read_func)  (void *ptr, size_t size, size_t nmemb, void *datasource);
+
−		int    (*seek_func)  (void *datasource, ogg_int64_t offset, int whence);
+
−		int    (*close_func) (void *datasource);
+
−		long   (*tell_func)  (void *datasource);
+
−	} ov_callbacks;
+
−	typedef struct OggVorbis_File {
+
−		void            *datasource; /* Pointer to a FILE *, etc. */
+
−		int              seekable;
+
−		ogg_int64_t      offset;
+
−		ogg_int64_t      end;
+
−		ogg_sync_state   oy;
+
−		
+
−		/* If the FILE handle isn't seekable (eg, a pipe), only the current
+
−		 stream appears */
+
−		int              links;
+
−		ogg_int64_t     *offsets;
+
−		ogg_int64_t     *dataoffsets;
+
−		long            *serialnos;
+
−		ogg_int64_t     *pcmlengths; /* overloaded to maintain binary
+
−		 compatability; x2 size, stores both
+
−		 beginning and end values */
+
−		vorbis_info     *vi;
+
−		vorbis_comment  *vc;
+
−		
+
−		/* Decoding working state local storage */
+
−		ogg_int64_t      pcm_offset;
+
−		int              ready_state;
+
−		long             current_serialno;
+
−		int              current_link;
+
−		
+
−		double           bittrack;
+
−		double           samptrack;
+
−		
+
−		ogg_stream_state os; /* take physical pages, weld into a logical
+
−		 stream of packets */
+
−		vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */
+
−		vorbis_block     vb; /* local working space for packet->PCM decode */
+
−		
+
−		ov_callbacks callbacks;
+
−		
+
−	} OggVorbis_File;
+
−	
+
−	
+
−	int load_WavPcm		(const char *filename, ALenum *format, uint8_t **data, ALsizei *bitsize, ALsizei *freq);
+
−	int load_OggVorbis	(const char *filename, ALenum *format, uint8_t **data, ALsizei *bitsize, ALsizei *freq);
+
−	
+
−#ifdef __CPLUSPLUS
+
−}
+
−#endif