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Diffstat (limited to 'Tremolo/ogg.h')
| -rw-r--r-- | Tremolo/ogg.h | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/Tremolo/ogg.h b/Tremolo/ogg.h new file mode 100644 index 0000000..c5c3106 --- /dev/null +++ b/Tremolo/ogg.h @@ -0,0 +1,223 @@ +/******************************************************************** + * * + * THIS FILE IS PART OF THE Theorarm SOFTWARE CODEC SOURCE CODE. * + * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * + * GOVERNED BY A SOURCE LICENSE INCLUDED WITH THIS SOURCE * + * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * + * * + * THE Theora/Tremor SOURCE CODE IS COPYRIGHT (C) 2002-2009 * + * by the Xiph.Org Foundation and contributors http://www.xiph.org/ * + * Modifications/Additions Copyright (C) 2009 Robin Watts for * + * Pinknoise Productions Ltd. * + * * + ******************************************************************** + + function: subsumed libogg includes + + ********************************************************************/ +#ifndef _OGG_H +#define _OGG_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include "os_types.h" + +#ifndef ONLY_C +#define ARM_LITTLE_ENDIAN +#endif + +typedef struct ogg_buffer_state{ + struct ogg_buffer *unused_buffers; + struct ogg_reference *unused_references; + int outstanding; + int shutdown; +} ogg_buffer_state; + +typedef struct ogg_buffer { + unsigned char *data; + long size; + int refcount; + + union { + ogg_buffer_state *owner; + struct ogg_buffer *next; + } ptr; +} ogg_buffer; + +typedef struct ogg_reference { + ogg_buffer *buffer; + long begin; + long length; + + struct ogg_reference *next; +} ogg_reference; + +typedef struct oggpack_buffer { +#ifdef ARM_LITTLE_ENDIAN + int bitsLeftInSegment; + ogg_uint32_t *ptr; + long bitsLeftInWord; +#else + int headbit; + unsigned char *headptr; + long headend; +#endif /* ARM_LITTLE_ENDIAN */ + /* memory management */ + ogg_reference *head; + ogg_reference *tail; + + /* render the byte/bit counter API constant time */ + long count; /* doesn't count the tail */ +} oggpack_buffer; + +typedef struct oggbyte_buffer { + ogg_reference *baseref; + + ogg_reference *ref; + unsigned char *ptr; + long pos; + long end; +} oggbyte_buffer; + +typedef struct ogg_sync_state { + /* decode memory management pool */ + ogg_buffer_state *bufferpool; + + /* stream buffers */ + ogg_reference *fifo_head; + ogg_reference *fifo_tail; + long fifo_fill; + + /* stream sync management */ + int unsynced; + int headerbytes; + int bodybytes; + +} ogg_sync_state; + +typedef struct ogg_stream_state { + ogg_reference *header_head; + ogg_reference *header_tail; + ogg_reference *body_head; + ogg_reference *body_tail; + + 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; + + int lacing_fill; + ogg_uint32_t body_fill; + + /* decode-side state data */ + int holeflag; + int spanflag; + int clearflag; + int laceptr; + ogg_uint32_t body_fill_next; + +} ogg_stream_state; + +typedef struct { + ogg_reference *packet; + long bytes; + long b_o_s; + long e_o_s; + ogg_int64_t granulepos; + 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_packet; + +typedef struct { + ogg_reference *header; + int header_len; + ogg_reference *body; + long body_len; +} ogg_page; + +/* Ogg BITSTREAM PRIMITIVES: bitstream ************************/ + +extern void oggpack_readinit(oggpack_buffer *b,ogg_reference *r); +extern long oggpack_look(oggpack_buffer *b,int bits); +extern void oggpack_adv(oggpack_buffer *b,int bits); +extern long oggpack_read(oggpack_buffer *b,int bits); +extern long oggpack_bytes(oggpack_buffer *b); +extern long oggpack_bits(oggpack_buffer *b); +extern int oggpack_eop(oggpack_buffer *b); + +// Quick hack +#define oggpack_bytesleft(B) (((B)->bitsLeftInSegment+7)/8) + +/* Ogg BITSTREAM PRIMITIVES: decoding **************************/ + +extern void ogg_sync_init(ogg_sync_state *oy); +extern ogg_sync_state *ogg_sync_create(void); +extern int ogg_sync_clear(ogg_sync_state *oy); +extern int ogg_sync_destroy(ogg_sync_state *oy); +extern int ogg_sync_reset(ogg_sync_state *oy); + +extern unsigned char *ogg_sync_bufferin(ogg_sync_state *oy, long size); +extern int ogg_sync_wrote(ogg_sync_state *oy, long bytes); +extern long ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og); +extern int ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og); +extern int ogg_stream_pagein(ogg_stream_state *os, ogg_page *og); +extern int ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op); +extern int ogg_stream_packetpeek(ogg_stream_state *os,ogg_packet *op); + +/* Ogg BITSTREAM PRIMITIVES: general ***************************/ + +extern void ogg_stream_init(ogg_stream_state *os, int serialno); +extern ogg_stream_state *ogg_stream_create(int serialno); +extern int ogg_stream_destroy(ogg_stream_state *os); +extern int ogg_stream_clear(ogg_stream_state *os); +extern int ogg_stream_reset(ogg_stream_state *os); +extern int ogg_stream_reset_serialno(ogg_stream_state *os,int serialno); +extern int ogg_stream_eos(ogg_stream_state *os); + +extern int ogg_page_checksum_set(ogg_page *og); + +extern int ogg_page_version(ogg_page *og); +extern int ogg_page_continued(ogg_page *og); +extern int ogg_page_bos(ogg_page *og); +extern int ogg_page_eos(ogg_page *og); +extern ogg_int64_t ogg_page_granulepos(ogg_page *og); +extern ogg_uint32_t ogg_page_serialno(ogg_page *og); +extern ogg_uint32_t ogg_page_pageno(ogg_page *og); +extern int ogg_page_packets(ogg_page *og); +extern int ogg_page_getbuffer(ogg_page *og, unsigned char **buffer); + +extern int ogg_packet_release(ogg_packet *op); +extern int ogg_page_release(ogg_page *og); + +extern void ogg_page_dup(ogg_page *d, ogg_page *s); + +/* Ogg BITSTREAM PRIMITIVES: return codes ***************************/ + +#define OGG_SUCCESS 0 + +#define OGG_HOLE -10 +#define OGG_SPAN -11 +#define OGG_EVERSION -12 +#define OGG_ESERIAL -13 +#define OGG_EINVAL -14 +#define OGG_EEOS -15 + + +#ifdef __cplusplus +} +#endif + +#endif /* _OGG_H */ |