opusfile.h

/********************************************************************
 *                                                                  *
 * THIS FILE IS PART OF THE libopusfile SOFTWARE CODEC SOURCE CODE. *
 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
 *                                                                  *
 * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 1994-2012           *
 * by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
 *                                                                  *
 ********************************************************************

 function: stdio-based convenience library for opening/seeking/decoding
 last mod: $Id: vorbisfile.h 17182 2010-04-29 03:48:32Z xiphmont $

 ********************************************************************/
#if !defined(_opusfile_h)
# define _opusfile_h (1)
# include <stdarg.h>

# if defined(__cplusplus)
extern "C" {
# endif

# include <stdio.h>
# include <ogg/ogg.h>
# include <opus_multistream.h>

/*Enable special features for gcc and gcc-compatible compilers.*/
# if !defined(OP_GNUC_PREREQ)
#  if defined(__GNUC__)&&defined(__GNUC_MINOR__)
#   define OP_GNUC_PREREQ(_maj,_min) \
 ((__GNUC__<<16)+__GNUC_MINOR__>=((_maj)<<16)+(_min))
#  else
#   define OP_GNUC_PREREQ(_maj,_min) 0
#  endif
# endif

# if OP_GNUC_PREREQ(4,0)
#  pragma GCC visibility push(default)
# endif

typedef struct OpusHead    OpusHead;
typedef struct OpusTags    OpusTags;
typedef struct OggOpusFile OggOpusFile;

/*Warning attributes for libopusfile functions.*/
# if OP_GNUC_PREREQ(3,4)
#  define OP_WARN_UNUSED_RESULT __attribute__((__warn_unused_result__))
# else
#  define OP_WARN_UNUSED_RESULT
# endif
# if OP_GNUC_PREREQ(3,4)
#  define OP_ARG_NONNULL(_x) __attribute__((__nonnull__(_x)))
# else
#  define OP_ARG_NONNULL(_x)
# endif


#define OP_FALSE         (-1)
/*Currently not used externally.*/
#define OP_EOF           (-2)

#define OP_HOLE          (-3)

#define OP_EREAD         (-128)

#define OP_EFAULT        (-129)

#define OP_EIMPL         (-130)

#define OP_EINVAL        (-131)

#define OP_ENOTFORMAT    (-132)

#define OP_EBADHEADER    (-133)

#define OP_EVERSION      (-134)
/*Currently not used at all.*/
#define OP_ENOTAUDIO     (-135)

#define OP_EBADPACKET    (-136)

#define OP_EBADLINK      (-137)

#define OP_ENOSEEK       (-138)

#define OP_EBADTIMESTAMP (-139)



#define OPUS_CHANNEL_COUNT_MAX (255)

struct OpusHead{
  int           version;
  int           channel_count;
  unsigned      pre_skip;
  opus_uint32   input_sample_rate;
  int           output_gain;
  int           mapping_family;
  int           stream_count;
  int           coupled_count;
  unsigned char mapping[OPUS_CHANNEL_COUNT_MAX];
};

struct OpusTags{
  char **user_comments;
  int   *comment_lengths;
  int    comments;
  char  *vendor;
};


OP_WARN_UNUSED_RESULT int opus_head_parse(OpusHead *_head,
 const unsigned char *_data,size_t _len) OP_ARG_NONNULL(2);

ogg_int64_t opus_granule_sample(const OpusHead *_head,ogg_int64_t _gp)
 OP_ARG_NONNULL(1);

OP_WARN_UNUSED_RESULT int opus_tags_parse(OpusTags *_tags,
 const unsigned char *_data,size_t _len) OP_ARG_NONNULL(2);

void opus_tags_init(OpusTags *_tags) OP_ARG_NONNULL(1);

int opus_tags_add(OpusTags *_tags,const char *_tag,const char *_value)
 OP_ARG_NONNULL(1) OP_ARG_NONNULL(2) OP_ARG_NONNULL(3);

int opus_tags_add_comment(OpusTags *_tags,const char *_comment)
 OP_ARG_NONNULL(1) OP_ARG_NONNULL(2);

const char *opus_tags_query(const OpusTags *_tags,const char *_tag,int _count)
 OP_ARG_NONNULL(1) OP_ARG_NONNULL(2);

int opus_tags_query_count(const OpusTags *_tags,const char *_tag)
 OP_ARG_NONNULL(1) OP_ARG_NONNULL(2);

void opus_tags_clear(OpusTags *_tags) OP_ARG_NONNULL(1);



/*These are the raw numbers used to define the request codes.
  They should not be used directly.*/
#define OP_SSL_SKIP_CERTIFICATE_CHECK_REQUEST (6464)
#define OP_HTTP_PROXY_HOST_REQUEST            (6528)
#define OP_HTTP_PROXY_PORT_REQUEST            (6592)
#define OP_HTTP_PROXY_USER_REQUEST            (6656)
#define OP_HTTP_PROXY_PASS_REQUEST            (6720)

#define OP_URL_OPT(_request) ((_request)+(char *)0)

/*These macros trigger compilation errors or warnings if the wrong types are
   provided to one of the URL options.*/
#define OP_CHECK_INT(_x) ((void)((_x)==(opus_int32)0),(opus_int32)(_x))
#define OP_CHECK_CONST_CHAR_PTR(_x) ((_x)+((_x)-(const char *)(_x)))

#define OP_SSL_SKIP_CERTIFICATE_CHECK(_b) \
 OP_URL_OPT(OP_SSL_SKIP_CERTIFICATE_CHECK_REQUEST),OP_CHECK_INT(_b)

#define OP_HTTP_PROXY_HOST(_host) \
 OP_URL_OPT(OP_HTTP_PROXY_HOST_REQUEST),OP_CHECK_CONST_CHAR_PTR(_host)

#define OP_HTTP_PROXY_PORT(_port) \
 OP_URL_OPT(OP_HTTP_PROXY_PORT_REQUEST),OP_CHECK_INT(_port)

#define OP_HTTP_PROXY_USER(_user) \
 OP_URL_OPT(OP_HTTP_PROXY_USER_REQUEST),OP_CHECK_CONST_CHAR_PTR(_host)

#define OP_HTTP_PROXY_PASS(_pass) \
 OP_URL_OPT(OP_HTTP_PROXY_PASS_REQUEST),OP_CHECK_CONST_CHAR_PTR(_host)



typedef struct OpusFileCallbacks OpusFileCallbacks;

typedef int (*op_read_func)(void *_stream,unsigned char *_ptr,int _nbytes);

typedef int (*op_seek_func)(void *_stream,opus_int64 _offset,int _whence);

typedef opus_int64 (*op_tell_func)(void *_stream);

typedef int (*op_close_func)(void *_stream);

struct OpusFileCallbacks{
  op_read_func  read;
  op_seek_func  seek;
  op_tell_func  tell;
  op_close_func close;
};

OP_WARN_UNUSED_RESULT void *op_fopen(OpusFileCallbacks *_cb,
 const char *_path,const char *_mode) OP_ARG_NONNULL(1) OP_ARG_NONNULL(2)
 OP_ARG_NONNULL(3);

OP_WARN_UNUSED_RESULT void *op_fdopen(OpusFileCallbacks *_cb,
 int _fd,const char *_mode) OP_ARG_NONNULL(1) OP_ARG_NONNULL(3);

OP_WARN_UNUSED_RESULT void *op_freopen(OpusFileCallbacks *_cb,
 const char *_path,const char *_mode,void *_stream) OP_ARG_NONNULL(1)
 OP_ARG_NONNULL(2) OP_ARG_NONNULL(3) OP_ARG_NONNULL(4);

OP_WARN_UNUSED_RESULT void *op_mem_stream_create(OpusFileCallbacks *_cb,
 const unsigned char *_data,size_t _size) OP_ARG_NONNULL(1);

OP_WARN_UNUSED_RESULT void *op_url_stream_vcreate(OpusFileCallbacks *_cb,
 const char *_url,va_list _ap) OP_ARG_NONNULL(1) OP_ARG_NONNULL(2);

OP_WARN_UNUSED_RESULT void *op_url_stream_create(OpusFileCallbacks *_cb,
 const char *_url,...) OP_ARG_NONNULL(1) OP_ARG_NONNULL(2);



int op_test(OpusHead *_head,
 const unsigned char *_initial_data,size_t _initial_bytes);

OP_WARN_UNUSED_RESULT OggOpusFile *op_open_file(const char *_path,int *_error)
 OP_ARG_NONNULL(1);

OP_WARN_UNUSED_RESULT OggOpusFile *op_open_memory(const unsigned char *_data,
 size_t _size,int *_error);

OP_WARN_UNUSED_RESULT OggOpusFile *op_vopen_url(const char *_url,
 int *_error,va_list _ap) OP_ARG_NONNULL(1);

OP_WARN_UNUSED_RESULT OggOpusFile *op_open_url(const char *_url,
 int *_error,...) OP_ARG_NONNULL(1);

OP_WARN_UNUSED_RESULT OggOpusFile *op_open_callbacks(void *_source,
 const OpusFileCallbacks *_cb,const unsigned char *_initial_data,
 size_t _initial_bytes,int *_error) OP_ARG_NONNULL(2);

OP_WARN_UNUSED_RESULT OggOpusFile *op_test_file(const char *_path,int *_error)
 OP_ARG_NONNULL(1);

OP_WARN_UNUSED_RESULT OggOpusFile *op_test_memory(const unsigned char *_data,
 size_t _size,int *_error);

OP_WARN_UNUSED_RESULT OggOpusFile *op_vtest_url(const char *_url,
 int *_error,va_list _ap) OP_ARG_NONNULL(1);

OP_WARN_UNUSED_RESULT OggOpusFile *op_test_url(const char *_url,
 int *_error,...) OP_ARG_NONNULL(1);

OP_WARN_UNUSED_RESULT OggOpusFile *op_test_callbacks(void *_source,
 const OpusFileCallbacks *_cb,const unsigned char *_initial_data,
 size_t _initial_bytes,int *_error) OP_ARG_NONNULL(2);

int op_test_open(OggOpusFile *_of) OP_ARG_NONNULL(1);

void op_free(OggOpusFile *_of);



int op_seekable(OggOpusFile *_of) OP_ARG_NONNULL(1);

int op_link_count(OggOpusFile *_of) OP_ARG_NONNULL(1);

opus_uint32 op_serialno(OggOpusFile *_of,int _li) OP_ARG_NONNULL(1);

int op_channel_count(OggOpusFile *_of,int _li) OP_ARG_NONNULL(1);

opus_int64 op_raw_total(OggOpusFile *_of,int _li) OP_ARG_NONNULL(1);

ogg_int64_t op_pcm_total(OggOpusFile *_of,int _li) OP_ARG_NONNULL(1);

const OpusHead *op_head(OggOpusFile *_of,int _li) OP_ARG_NONNULL(1);

const OpusTags *op_tags(OggOpusFile *_of,int _li) OP_ARG_NONNULL(1);

int op_current_link(OggOpusFile *_of) OP_ARG_NONNULL(1);

opus_int32 op_bitrate(OggOpusFile *_of,int _li) OP_ARG_NONNULL(1);

opus_int32 op_bitrate_instant(OggOpusFile *_of) OP_ARG_NONNULL(1);

opus_int64 op_raw_tell(OggOpusFile *_of) OP_ARG_NONNULL(1);

ogg_int64_t op_pcm_tell(OggOpusFile *_of) OP_ARG_NONNULL(1);



int op_raw_seek(OggOpusFile *_of,opus_int64 _byte_offset) OP_ARG_NONNULL(1);

int op_pcm_seek(OggOpusFile *_of,ogg_int64_t _pcm_offset) OP_ARG_NONNULL(1);



OP_WARN_UNUSED_RESULT int op_read(OggOpusFile *_of,
 opus_int16 *_pcm,int _buf_size,int *_li) OP_ARG_NONNULL(1);

OP_WARN_UNUSED_RESULT int op_read_float(OggOpusFile *_of,
 float *_pcm,int _buf_size,int *_li) OP_ARG_NONNULL(1);

OP_WARN_UNUSED_RESULT int op_read_stereo(OggOpusFile *_of,
 opus_int16 *_pcm,int _buf_size) OP_ARG_NONNULL(1);

OP_WARN_UNUSED_RESULT int op_read_float_stereo(OggOpusFile *_of,
 float *_pcm,int _buf_size) OP_ARG_NONNULL(1);


# if OP_GNUC_PREREQ(4,0)
#  pragma GCC visibility pop
# endif

# if defined(__cplusplus)
}
# endif

#endif