ref: 9ec1a07af2537e5485524c8d079a07abfee6f96d
dir: /sys/src/cmd/audio/libFLAC/FLAC/seekable_stream_decoder.h/
/* libFLAC - Free Lossless Audio Codec library
* Copyright (C) 2000,2001,2002,2003,2004 Josh Coalson
*
* 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 FLAC__SEEKABLE_STREAM_DECODER_H
#define FLAC__SEEKABLE_STREAM_DECODER_H
#include "export.h"
#include "stream_decoder.h"
#ifdef __cplusplus
extern "C" {
#endif
/** \file include/FLAC/seekable_stream_decoder.h
*
* \brief
* This module contains the functions which implement the seekable stream
* decoder.
*
* See the detailed documentation in the
* \link flac_seekable_stream_decoder seekable stream decoder \endlink module.
*/
/** \defgroup flac_seekable_stream_decoder FLAC/seekable_stream_decoder.h: seekable stream decoder interface
* \ingroup flac_decoder
*
* \brief
* This module contains the functions which implement the seekable stream
* decoder.
*
* The basic usage of this decoder is as follows:
* - The program creates an instance of a decoder using
* FLAC__seekable_stream_decoder_new().
* - The program overrides the default settings and sets callbacks for
* reading, writing, seeking, error reporting, and metadata reporting
* using FLAC__seekable_stream_decoder_set_*() functions.
* - The program initializes the instance to validate the settings and
* prepare for decoding using FLAC__seekable_stream_decoder_init().
* - The program calls the FLAC__seekable_stream_decoder_process_*()
* functions to decode data, which subsequently calls the callbacks.
* - The program finishes the decoding with
* FLAC__seekable_stream_decoder_finish(), which flushes the input and
* output and resets the decoder to the uninitialized state.
* - The instance may be used again or deleted with
* FLAC__seekable_stream_decoder_delete().
*
* The seekable stream decoder is a wrapper around the
* \link flac_stream_decoder stream decoder \endlink which also provides
* seeking capability. In addition to the Read/Write/Metadata/Error
* callbacks of the stream decoder, the user must also provide the following:
*
* - Seek callback - This function will be called when the decoder wants to
* seek to an absolute position in the stream.
* - Tell callback - This function will be called when the decoder wants to
* know the current absolute position of the stream.
* - Length callback - This function will be called when the decoder wants
* to know length of the stream. The seeking algorithm currently requires
* that the overall stream length be known.
* - EOF callback - This function will be called when the decoder wants to
* know if it is at the end of the stream. This could be synthesized from
* the tell and length callbacks but it may be more expensive that way, so
* there is a separate callback for it.
*
* Seeking is exposed through the
* FLAC__seekable_stream_decoder_seek_absolute() method. At any point after
* the seekable stream decoder has been initialized, the user can call this
* function to seek to an exact sample within the stream. Subsequently, the
* first time the write callback is called it will be passed a (possibly
* partial) block starting at that sample.
*
* The seekable stream decoder also provides MD5 signature checking. If
* this is turned on before initialization,
* FLAC__seekable_stream_decoder_finish() will report when the decoded MD5
* signature does not match the one stored in the STREAMINFO block. MD5
* checking is automatically turned off (until the next
* FLAC__seekable_stream_decoder_reset()) if there is no signature in the
* STREAMINFO block or when a seek is attempted.
*
* Make sure to read the detailed description of the
* \link flac_stream_decoder stream decoder module \endlink since the
* seekable stream decoder inherits much of its behavior.
*
* \note
* The "set" functions may only be called when the decoder is in the
* state FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED, i.e. after
* FLAC__seekable_stream_decoder_new() or
* FLAC__seekable_stream_decoder_finish(), but before
* FLAC__seekable_stream_decoder_init(). If this is the case they will
* return \c true, otherwise \c false.
*
* \note
* FLAC__stream_decoder_finish() resets all settings to the constructor
* defaults, including the callbacks.
*
* \{
*/
/** State values for a FLAC__SeekableStreamDecoder
*
* The decoder's state can be obtained by calling FLAC__seekable_stream_decoder_get_state().
*/
typedef enum {
FLAC__SEEKABLE_STREAM_DECODER_OK = 0,
/**< The decoder is in the normal OK state. */
FLAC__SEEKABLE_STREAM_DECODER_SEEKING,
/**< The decoder is in the process of seeking. */
FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM,
/**< The decoder has reached the end of the stream. */
FLAC__SEEKABLE_STREAM_DECODER_MEMORY_ALLOCATION_ERROR,
/**< An error occurred allocating memory. */
FLAC__SEEKABLE_STREAM_DECODER_STREAM_DECODER_ERROR,
/**< An error occurred in the underlying stream decoder. */
FLAC__SEEKABLE_STREAM_DECODER_READ_ERROR,
/**< The read callback returned an error. */
FLAC__SEEKABLE_STREAM_DECODER_SEEK_ERROR,
/**< An error occurred while seeking or the seek or tell
* callback returned an error.
*/
FLAC__SEEKABLE_STREAM_DECODER_ALREADY_INITIALIZED,
/**< FLAC__seekable_stream_decoder_init() was called when the
* decoder was already initialized, usually because
* FLAC__seekable_stream_decoder_finish() was not called.
*/
FLAC__SEEKABLE_STREAM_DECODER_INVALID_CALLBACK,
/**< FLAC__seekable_stream_decoder_init() was called without all
* callbacks being set.
*/
FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED
/**< The decoder is in the uninitialized state. */
} FLAC__SeekableStreamDecoderState;
/** Maps a FLAC__SeekableStreamDecoderState to a C string.
*
* Using a FLAC__SeekableStreamDecoderState as the index to this array
* will give the string equivalent. The contents should not be modified.
*/
extern FLAC_API const char * const FLAC__SeekableStreamDecoderStateString[];
/** Return values for the FLAC__SeekableStreamDecoder read callback.
*/
typedef enum {
FLAC__SEEKABLE_STREAM_DECODER_READ_STATUS_OK,
/**< The read was OK and decoding can continue. */
FLAC__SEEKABLE_STREAM_DECODER_READ_STATUS_ERROR
/**< An unrecoverable error occurred. The decoder will return from the process call. */
} FLAC__SeekableStreamDecoderReadStatus;
/** Maps a FLAC__SeekableStreamDecoderReadStatus to a C string.
*
* Using a FLAC__SeekableStreamDecoderReadStatus as the index to this array
* will give the string equivalent. The contents should not be modified.
*/
extern FLAC_API const char * const FLAC__SeekableStreamDecoderReadStatusString[];
/** Return values for the FLAC__SeekableStreamDecoder seek callback.
*/
typedef enum {
FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_OK,
/**< The seek was OK and decoding can continue. */
FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_ERROR
/**< An unrecoverable error occurred. The decoder will return from the process call. */
} FLAC__SeekableStreamDecoderSeekStatus;
/** Maps a FLAC__SeekableStreamDecoderSeekStatus to a C string.
*
* Using a FLAC__SeekableStreamDecoderSeekStatus as the index to this array
* will give the string equivalent. The contents should not be modified.
*/
extern FLAC_API const char * const FLAC__SeekableStreamDecoderSeekStatusString[];
/** Return values for the FLAC__SeekableStreamDecoder tell callback.
*/
typedef enum {
FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_OK,
/**< The tell was OK and decoding can continue. */
FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_ERROR
/**< An unrecoverable error occurred. The decoder will return from the process call. */
} FLAC__SeekableStreamDecoderTellStatus;
/** Maps a FLAC__SeekableStreamDecoderTellStatus to a C string.
*
* Using a FLAC__SeekableStreamDecoderTellStatus as the index to this array
* will give the string equivalent. The contents should not be modified.
*/
extern FLAC_API const char * const FLAC__SeekableStreamDecoderTellStatusString[];
/** Return values for the FLAC__SeekableStreamDecoder length callback.
*/
typedef enum {
FLAC__SEEKABLE_STREAM_DECODER_LENGTH_STATUS_OK,
/**< The length call was OK and decoding can continue. */
FLAC__SEEKABLE_STREAM_DECODER_LENGTH_STATUS_ERROR
/**< An unrecoverable error occurred. The decoder will return from the process call. */
} FLAC__SeekableStreamDecoderLengthStatus;
/** Maps a FLAC__SeekableStreamDecoderLengthStatus to a C string.
*
* Using a FLAC__SeekableStreamDecoderLengthStatus as the index to this array
* will give the string equivalent. The contents should not be modified.
*/
extern FLAC_API const char * const FLAC__SeekableStreamDecoderLengthStatusString[];
/***********************************************************************
*
* class FLAC__SeekableStreamDecoder : public FLAC__StreamDecoder
*
***********************************************************************/
struct FLAC__SeekableStreamDecoderProtected;
struct FLAC__SeekableStreamDecoderPrivate;
/** The opaque structure definition for the seekable stream decoder type.
* See the
* \link flac_seekable_stream_decoder seekable stream decoder module \endlink
* for a detailed description.
*/
typedef struct {
struct FLAC__SeekableStreamDecoderProtected *protected_; /* avoid the C++ keyword 'protected' */
struct FLAC__SeekableStreamDecoderPrivate *private_; /* avoid the C++ keyword 'private' */
} FLAC__SeekableStreamDecoder;
/** Signature for the read callback.
* See FLAC__seekable_stream_decoder_set_read_callback()
* and FLAC__StreamDecoderReadCallback for more info.
*
* \param decoder The decoder instance calling the callback.
* \param buffer A pointer to a location for the callee to store
* data to be decoded.
* \param bytes A pointer to the size of the buffer.
* \param client_data The callee's client data set through
* FLAC__seekable_stream_decoder_set_client_data().
* \retval FLAC__SeekableStreamDecoderReadStatus
* The callee's return status.
*/
typedef FLAC__SeekableStreamDecoderReadStatus (*FLAC__SeekableStreamDecoderReadCallback)(const FLAC__SeekableStreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data);
/** Signature for the seek callback.
* See FLAC__seekable_stream_decoder_set_seek_callback() for more info.
*
* \param decoder The decoder instance calling the callback.
* \param absolute_byte_offset The offset from the beginning of the stream
* to seek to.
* \param client_data The callee's client data set through
* FLAC__seekable_stream_decoder_set_client_data().
* \retval FLAC__SeekableStreamDecoderSeekStatus
* The callee's return status.
*/
typedef FLAC__SeekableStreamDecoderSeekStatus (*FLAC__SeekableStreamDecoderSeekCallback)(const FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data);
/** Signature for the tell callback.
* See FLAC__seekable_stream_decoder_set_tell_callback() for more info.
*
* \param decoder The decoder instance calling the callback.
* \param absolute_byte_offset A pointer to storage for the current offset
* from the beginning of the stream.
* \param client_data The callee's client data set through
* FLAC__seekable_stream_decoder_set_client_data().
* \retval FLAC__SeekableStreamDecoderTellStatus
* The callee's return status.
*/
typedef FLAC__SeekableStreamDecoderTellStatus (*FLAC__SeekableStreamDecoderTellCallback)(const FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
/** Signature for the length callback.
* See FLAC__seekable_stream_decoder_set_length_callback() for more info.
*
* \param decoder The decoder instance calling the callback.
* \param stream_length A pointer to storage for the length of the stream
* in bytes.
* \param client_data The callee's client data set through
* FLAC__seekable_stream_decoder_set_client_data().
* \retval FLAC__SeekableStreamDecoderLengthStatus
* The callee's return status.
*/
typedef FLAC__SeekableStreamDecoderLengthStatus (*FLAC__SeekableStreamDecoderLengthCallback)(const FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data);
/** Signature for the EOF callback.
* See FLAC__seekable_stream_decoder_set_eof_callback() for more info.
*
* \param decoder The decoder instance calling the callback.
* \param client_data The callee's client data set through
* FLAC__seekable_stream_decoder_set_client_data().
* \retval FLAC__bool
* \c true if the currently at the end of the stream, else \c false.
*/
typedef FLAC__bool (*FLAC__SeekableStreamDecoderEofCallback)(const FLAC__SeekableStreamDecoder *decoder, void *client_data);
/** Signature for the write callback.
* See FLAC__seekable_stream_decoder_set_write_callback()
* and FLAC__StreamDecoderWriteCallback for more info.
*
* \param decoder The decoder instance calling the callback.
* \param frame The description of the decoded frame.
* \param buffer An array of pointers to decoded channels of data.
* \param client_data The callee's client data set through
* FLAC__seekable_stream_decoder_set_client_data().
* \retval FLAC__StreamDecoderWriteStatus
* The callee's return status.
*/
typedef FLAC__StreamDecoderWriteStatus (*FLAC__SeekableStreamDecoderWriteCallback)(const FLAC__SeekableStreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
/** Signature for the metadata callback.
* See FLAC__seekable_stream_decoder_set_metadata_callback()
* and FLAC__StreamDecoderMetadataCallback for more info.
*
* \param decoder The decoder instance calling the callback.
* \param metadata The decoded metadata block.
* \param client_data The callee's client data set through
* FLAC__seekable_stream_decoder_set_client_data().
*/
typedef void (*FLAC__SeekableStreamDecoderMetadataCallback)(const FLAC__SeekableStreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
/** Signature for the error callback.
* See FLAC__seekable_stream_decoder_set_error_callback()
* and FLAC__StreamDecoderErrorCallback for more info.
*
* \param decoder The decoder instance calling the callback.
* \param status The error encountered by the decoder.
* \param client_data The callee's client data set through
* FLAC__seekable_stream_decoder_set_client_data().
*/
typedef void (*FLAC__SeekableStreamDecoderErrorCallback)(const FLAC__SeekableStreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
/***********************************************************************
*
* Class constructor/destructor
*
***********************************************************************/
/** Create a new seekable stream decoder instance. The instance is created
* with default settings; see the individual
* FLAC__seekable_stream_decoder_set_*() functions for each setting's
* default.
*
* \retval FLAC__SeekableStreamDecoder*
* \c NULL if there was an error allocating memory, else the new instance.
*/
FLAC_API FLAC__SeekableStreamDecoder *FLAC__seekable_stream_decoder_new();
/** Free a decoder instance. Deletes the object pointed to by \a decoder.
*
* \param decoder A pointer to an existing decoder.
* \assert
* \code decoder != NULL \endcode
*/
FLAC_API void FLAC__seekable_stream_decoder_delete(FLAC__SeekableStreamDecoder *decoder);
/***********************************************************************
*
* Public class method prototypes
*
***********************************************************************/
/** Set the "MD5 signature checking" flag. If \c true, the decoder will
* compute the MD5 signature of the unencoded audio data while decoding
* and compare it to the signature from the STREAMINFO block, if it
* exists, during FLAC__seekable_stream_decoder_finish().
*
* MD5 signature checking will be turned off (until the next
* FLAC__seekable_stream_decoder_reset()) if there is no signature in
* the STREAMINFO block or when a seek is attempted.
*
* \default \c false
* \param decoder A decoder instance to set.
* \param value Flag value (see above).
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_md5_checking(FLAC__SeekableStreamDecoder *decoder, FLAC__bool value);
/** Set the read callback.
* This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_set_read_callback().
*
* \note
* The callback is mandatory and must be set before initialization.
*
* \default \c NULL
* \param decoder A decoder instance to set.
* \param value See above.
* \assert
* \code decoder != NULL \endcode
* \code value != NULL \endcode
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_read_callback(FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderReadCallback value);
/** Set the seek callback.
* The supplied function will be called when the decoder needs to seek
* the input stream. The decoder will pass the absolute byte offset
* to seek to, 0 meaning the beginning of the stream.
*
* \note
* The callback is mandatory and must be set before initialization.
*
* \default \c NULL
* \param decoder A decoder instance to set.
* \param value See above.
* \assert
* \code decoder != NULL \endcode
* \code value != NULL \endcode
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_seek_callback(FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderSeekCallback value);
/** Set the tell callback.
* The supplied function will be called when the decoder wants to know
* the current position of the stream. The callback should return the
* byte offset from the beginning of the stream.
*
* \note
* The callback is mandatory and must be set before initialization.
*
* \default \c NULL
* \param decoder A decoder instance to set.
* \param value See above.
* \assert
* \code decoder != NULL \endcode
* \code value != NULL \endcode
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_tell_callback(FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderTellCallback value);
/** Set the length callback.
* The supplied function will be called when the decoder wants to know
* the total length of the stream in bytes.
*
* \note
* The callback is mandatory and must be set before initialization.
*
* \default \c NULL
* \param decoder A decoder instance to set.
* \param value See above.
* \assert
* \code decoder != NULL \endcode
* \code value != NULL \endcode
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_length_callback(FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderLengthCallback value);
/** Set the eof callback.
* The supplied function will be called when the decoder needs to know
* if the end of the stream has been reached.
*
* \note
* The callback is mandatory and must be set before initialization.
*
* \default \c NULL
* \param decoder A decoder instance to set.
* \param value See above.
* \assert
* \code decoder != NULL \endcode
* \code value != NULL \endcode
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_eof_callback(FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderEofCallback value);
/** Set the write callback.
* This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_set_write_callback().
*
* \note
* The callback is mandatory and must be set before initialization.
*
* \default \c NULL
* \param decoder A decoder instance to set.
* \param value See above.
* \assert
* \code decoder != NULL \endcode
* \code value != NULL \endcode
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_write_callback(FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderWriteCallback value);
/** Set the metadata callback.
* This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_set_metadata_callback().
*
* \note
* The callback is mandatory and must be set before initialization.
*
* \default \c NULL
* \param decoder A decoder instance to set.
* \param value See above.
* \assert
* \code decoder != NULL \endcode
* \code value != NULL \endcode
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_metadata_callback(FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderMetadataCallback value);
/** Set the error callback.
* This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_set_error_callback().
*
* \note
* The callback is mandatory and must be set before initialization.
*
* \default \c NULL
* \param decoder A decoder instance to set.
* \param value See above.
* \assert
* \code decoder != NULL \endcode
* \code value != NULL \endcode
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_error_callback(FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderErrorCallback value);
/** Set the client data to be passed back to callbacks.
* This value will be supplied to callbacks in their \a client_data
* argument.
*
* \default \c NULL
* \param decoder A decoder instance to set.
* \param value See above.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_client_data(FLAC__SeekableStreamDecoder *decoder, void *value);
/** This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_set_metadata_respond().
*
* \default By default, only the \c STREAMINFO block is returned via the
* metadata callback.
* \param decoder A decoder instance to set.
* \param type See above.
* \assert
* \code decoder != NULL \endcode
* \a type is valid
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_metadata_respond(FLAC__SeekableStreamDecoder *decoder, FLAC__MetadataType type);
/** This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_set_metadata_respond_application().
*
* \default By default, only the \c STREAMINFO block is returned via the
* metadata callback.
* \param decoder A decoder instance to set.
* \param id See above.
* \assert
* \code decoder != NULL \endcode
* \code id != NULL \endcode
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_metadata_respond_application(FLAC__SeekableStreamDecoder *decoder, const FLAC__byte id[4]);
/** This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_set_metadata_respond_all().
*
* \default By default, only the \c STREAMINFO block is returned via the
* metadata callback.
* \param decoder A decoder instance to set.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_metadata_respond_all(FLAC__SeekableStreamDecoder *decoder);
/** This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_set_metadata_ignore().
*
* \default By default, only the \c STREAMINFO block is returned via the
* metadata callback.
* \param decoder A decoder instance to set.
* \param type See above.
* \assert
* \code decoder != NULL \endcode
* \a type is valid
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_metadata_ignore(FLAC__SeekableStreamDecoder *decoder, FLAC__MetadataType type);
/** This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_set_metadata_ignore_application().
*
* \default By default, only the \c STREAMINFO block is returned via the
* metadata callback.
* \param decoder A decoder instance to set.
* \param id See above.
* \assert
* \code decoder != NULL \endcode
* \code id != NULL \endcode
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_metadata_ignore_application(FLAC__SeekableStreamDecoder *decoder, const FLAC__byte id[4]);
/** This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_set_metadata_ignore_all().
*
* \default By default, only the \c STREAMINFO block is returned via the
* metadata callback.
* \param decoder A decoder instance to set.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__bool
* \c false if the decoder is already initialized, else \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_set_metadata_ignore_all(FLAC__SeekableStreamDecoder *decoder);
/** Get the current decoder state.
*
* \param decoder A decoder instance to query.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__SeekableStreamDecoderState
* The current decoder state.
*/
FLAC_API FLAC__SeekableStreamDecoderState FLAC__seekable_stream_decoder_get_state(const FLAC__SeekableStreamDecoder *decoder);
/** Get the state of the underlying stream decoder.
* Useful when the seekable stream decoder state is
* \c FLAC__SEEKABLE_STREAM_DECODER_STREAM_DECODER_ERROR.
*
* \param decoder A decoder instance to query.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__StreamDecoderState
* The stream decoder state.
*/
FLAC_API FLAC__StreamDecoderState FLAC__seekable_stream_decoder_get_stream_decoder_state(const FLAC__SeekableStreamDecoder *decoder);
/** Get the current decoder state as a C string.
* This version automatically resolves
* \c FLAC__SEEKABLE_STREAM_DECODER_STREAM_DECODER_ERROR by getting the
* stream decoder's state.
*
* \param decoder A decoder instance to query.
* \assert
* \code decoder != NULL \endcode
* \retval const char *
* The decoder state as a C string. Do not modify the contents.
*/
FLAC_API const char *FLAC__seekable_stream_decoder_get_resolved_state_string(const FLAC__SeekableStreamDecoder *decoder);
/** Get the "MD5 signature checking" flag.
* This is the value of the setting, not whether or not the decoder is
* currently checking the MD5 (remember, it can be turned off automatically
* by a seek). When the decoder is reset the flag will be restored to the
* value returned by this function.
*
* \param decoder A decoder instance to query.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__bool
* See above.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_get_md5_checking(const FLAC__SeekableStreamDecoder *decoder);
/** This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_get_channels().
*
* \param decoder A decoder instance to query.
* \assert
* \code decoder != NULL \endcode
* \retval unsigned
* See above.
*/
FLAC_API unsigned FLAC__seekable_stream_decoder_get_channels(const FLAC__SeekableStreamDecoder *decoder);
/** This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_get_channel_assignment().
*
* \param decoder A decoder instance to query.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__ChannelAssignment
* See above.
*/
FLAC_API FLAC__ChannelAssignment FLAC__seekable_stream_decoder_get_channel_assignment(const FLAC__SeekableStreamDecoder *decoder);
/** This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_get_bits_per_sample().
*
* \param decoder A decoder instance to query.
* \assert
* \code decoder != NULL \endcode
* \retval unsigned
* See above.
*/
FLAC_API unsigned FLAC__seekable_stream_decoder_get_bits_per_sample(const FLAC__SeekableStreamDecoder *decoder);
/** This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_get_sample_rate().
*
* \param decoder A decoder instance to query.
* \assert
* \code decoder != NULL \endcode
* \retval unsigned
* See above.
*/
FLAC_API unsigned FLAC__seekable_stream_decoder_get_sample_rate(const FLAC__SeekableStreamDecoder *decoder);
/** This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_get_blocksize().
*
* \param decoder A decoder instance to query.
* \assert
* \code decoder != NULL \endcode
* \retval unsigned
* See above.
*/
FLAC_API unsigned FLAC__seekable_stream_decoder_get_blocksize(const FLAC__SeekableStreamDecoder *decoder);
/** Returns the decoder's current read position within the stream.
* The position is the byte offset from the start of the stream.
* Bytes before this position have been fully decoded. Note that
* there may still be undecoded bytes in the decoder's read FIFO.
* The returned position is correct even after a seek.
*
* \param decoder A decoder instance to query.
* \param position Address at which to return the desired position.
* \assert
* \code decoder != NULL \endcode
* \code position != NULL \endcode
* \retval FLAC__bool
* \c true if successful, \c false if there was an error from
* the 'tell' callback.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_get_decode_position(const FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *position);
/** Initialize the decoder instance.
* Should be called after FLAC__seekable_stream_decoder_new() and
* FLAC__seekable_stream_decoder_set_*() but before any of the
* FLAC__seekable_stream_decoder_process_*() functions. Will set and return
* the decoder state, which will be FLAC__SEEKABLE_STREAM_DECODER_OK
* if initialization succeeded.
*
* \param decoder An uninitialized decoder instance.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__SeekableStreamDecoderState
* \c FLAC__SEEKABLE_STREAM_DECODER_OK if initialization was
* successful; see FLAC__SeekableStreamDecoderState for the meanings
* of other return values.
*/
FLAC_API FLAC__SeekableStreamDecoderState FLAC__seekable_stream_decoder_init(FLAC__SeekableStreamDecoder *decoder);
/** Finish the decoding process.
* Flushes the decoding buffer, releases resources, resets the decoder
* settings to their defaults, and returns the decoder state to
* FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED.
*
* In the event of a prematurely-terminated decode, it is not strictly
* necessary to call this immediately before
* FLAC__seekable_stream_decoder_delete() but it is good practice to match
* every FLAC__seekable_stream_decoder_init() with a
* FLAC__seekable_stream_decoder_finish().
*
* \param decoder An uninitialized decoder instance.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__bool
* \c false if MD5 checking is on AND a STREAMINFO block was available
* AND the MD5 signature in the STREAMINFO block was non-zero AND the
* signature does not match the one computed by the decoder; else
* \c true.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_finish(FLAC__SeekableStreamDecoder *decoder);
/** Flush the stream input.
* The decoder's input buffer will be cleared and the state set to
* \c FLAC__SEEKABLE_STREAM_DECODER_OK. This will also turn off MD5
* checking.
*
* \param decoder A decoder instance.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__bool
* \c true if successful, else \c false if a memory allocation
* or stream decoder error occurs.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_flush(FLAC__SeekableStreamDecoder *decoder);
/** Reset the decoding process.
* The decoder's input buffer will be cleared and the state set to
* \c FLAC__SEEKABLE_STREAM_DECODER_OK. This is similar to
* FLAC__seekable_stream_decoder_finish() except that the settings are
* preserved; there is no need to call FLAC__seekable_stream_decoder_init()
* before decoding again. MD5 checking will be restored to its original
* setting.
*
* \param decoder A decoder instance.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__bool
* \c true if successful, else \c false if a memory allocation
* or stream decoder error occurs.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_reset(FLAC__SeekableStreamDecoder *decoder);
/** This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_process_single().
*
* \param decoder A decoder instance.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__bool
* See above.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_process_single(FLAC__SeekableStreamDecoder *decoder);
/** This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_process_until_end_of_metadata().
*
* \param decoder A decoder instance.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__bool
* See above.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_process_until_end_of_metadata(FLAC__SeekableStreamDecoder *decoder);
/** This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_process_until_end_of_stream().
*
* \param decoder A decoder instance.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__bool
* See above.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_process_until_end_of_stream(FLAC__SeekableStreamDecoder *decoder);
/** This is inherited from FLAC__StreamDecoder; see
* FLAC__stream_decoder_skip_single_frame().
*
* \param decoder A decoder instance.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__bool
* See above.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_skip_single_frame(FLAC__SeekableStreamDecoder *decoder);
/** Flush the input and seek to an absolute sample.
* Decoding will resume at the given sample. Note that because of
* this, the next write callback may contain a partial block.
*
* \param decoder A decoder instance.
* \param sample The target sample number to seek to.
* \assert
* \code decoder != NULL \endcode
* \retval FLAC__bool
* \c true if successful, else \c false.
*/
FLAC_API FLAC__bool FLAC__seekable_stream_decoder_seek_absolute(FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 sample);
/* \} */
#ifdef __cplusplus
}
#endif
#endif