file_decoder.h
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上传日期:2014-04-03
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文件大小:22k
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Windows CE
开发平台:
C/C++
- /* libOggFLAC - Free Lossless Audio Codec + Ogg library
- * Copyright (C) 2002,2003,2004,2005 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 OggFLAC__FILE_DECODER_H
- #define OggFLAC__FILE_DECODER_H
- #include "export.h"
- #include "seekable_stream_decoder.h"
- #ifdef __cplusplus
- extern "C" {
- #endif
- /** file include/OggFLAC/file_decoder.h
- *
- * brief
- * This module contains the functions which implement the file
- * decoder.
- *
- * See the detailed documentation in the
- * link oggflac_file_decoder file decoder endlink module.
- */
- /** defgroup oggflac_file_decoder OggFLAC/file_decoder.h: file decoder interface
- * ingroup oggflac_decoder
- *
- * brief
- * This module contains the functions which implement the file
- * decoder.
- *
- * The interface here is nearly identical to FLAC's file decoder,
- * including the callbacks, with the addition of
- * OggFLAC__file_decoder_set_serial_number(). See the
- * link flac_file_decoder FLAC file decoder module endlink
- * for full documentation.
- *
- * {
- */
- /** State values for an OggFLAC__FileDecoder
- *
- * The decoder's state can be obtained by calling OggFLAC__file_decoder_get_state().
- */
- typedef enum {
- OggFLAC__FILE_DECODER_OK = 0,
- /**< The decoder is in the normal OK state. */
- OggFLAC__FILE_DECODER_END_OF_FILE,
- /**< The decoder has reached the end of the file. */
- OggFLAC__FILE_DECODER_ERROR_OPENING_FILE,
- /**< An error occurred opening the input file. */
- OggFLAC__FILE_DECODER_SEEK_ERROR,
- /**< An error occurred while seeking. */
- OggFLAC__FILE_DECODER_SEEKABLE_STREAM_DECODER_ERROR,
- /**< An error occurred in the underlying seekable stream decoder;
- * check OggFLAC__file_decoder_get_seekable_stream_decoder_state().
- */
- OggFLAC__FILE_DECODER_MEMORY_ALLOCATION_ERROR,
- /**< Memory allocation failed. */
- OggFLAC__FILE_DECODER_ALREADY_INITIALIZED,
- /**< OggFLAC__file_decoder_init() was called when the decoder was
- * already initialized, usually because
- * OggFLAC__file_decoder_finish() was not called.
- */
- OggFLAC__FILE_DECODER_INVALID_CALLBACK,
- /**< The decoder was initialized before setting all the required callbacks. */
- OggFLAC__FILE_DECODER_UNINITIALIZED
- /**< The decoder is in the uninitialized state. */
- } OggFLAC__FileDecoderState;
- /** Maps an OggFLAC__FileDecoderState to a C string.
- *
- * Using an OggFLAC__FileDecoderState as the index to this array
- * will give the string equivalent. The contents should not be modified.
- */
- extern OggFLAC_API const char * const OggFLAC__FileDecoderStateString[];
- /***********************************************************************
- *
- * class OggFLAC__FileDecoder : public OggFLAC__SeekableStreamDecoder
- *
- ***********************************************************************/
- struct OggFLAC__FileDecoderProtected;
- struct OggFLAC__FileDecoderPrivate;
- /** The opaque structure definition for the file decoder type. See the
- * link oggflac_file_decoder file decoder module endlink for a detailed
- * description.
- */
- typedef struct {
- struct OggFLAC__FileDecoderProtected *protected_; /* avoid the C++ keyword 'protected' */
- struct OggFLAC__FileDecoderPrivate *private_; /* avoid the C++ keyword 'private' */
- } OggFLAC__FileDecoder;
- /** Signature for the write callback.
- * See OggFLAC__file_decoder_set_write_callback()
- * and OggFLAC__SeekableStreamDecoderWriteCallback 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
- * OggFLAC__file_decoder_set_client_data().
- * retval FLAC__StreamDecoderWriteStatus
- * The callee's return status.
- */
- typedef FLAC__StreamDecoderWriteStatus (*OggFLAC__FileDecoderWriteCallback)(const OggFLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
- /** Signature for the metadata callback.
- * See OggFLAC__file_decoder_set_metadata_callback()
- * and OggFLAC__SeekableStreamDecoderMetadataCallback 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
- * OggFLAC__file_decoder_set_client_data().
- */
- typedef void (*OggFLAC__FileDecoderMetadataCallback)(const OggFLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
- /** Signature for the error callback.
- * See OggFLAC__file_decoder_set_error_callback()
- * and OggFLAC__SeekableStreamDecoderErrorCallback 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
- * OggFLAC__file_decoder_set_client_data().
- */
- typedef void (*OggFLAC__FileDecoderErrorCallback)(const OggFLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
- /***********************************************************************
- *
- * Class constructor/destructor
- *
- ***********************************************************************/
- /** Create a new file decoder instance. The instance is created with
- * default settings; see the individual OggFLAC__file_decoder_set_*()
- * functions for each setting's default.
- *
- * retval OggFLAC__FileDecoder*
- * c NULL if there was an error allocating memory, else the new instance.
- */
- OggFLAC_API OggFLAC__FileDecoder *OggFLAC__file_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
- */
- OggFLAC_API void OggFLAC__file_decoder_delete(OggFLAC__FileDecoder *decoder);
- /***********************************************************************
- *
- * Public class method prototypes
- *
- ***********************************************************************/
- /** Set the "MD5 signature checking" flag.
- * This is inherited from FLAC__FileDecoder; see
- * FLAC__file_decoder_set_md5_checking().
- *
- * default c false
- * 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.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_set_md5_checking(OggFLAC__FileDecoder *decoder, FLAC__bool value);
- /** Set the input file name to decode.
- * This is inherited from FLAC__FileDecoder; see
- * FLAC__file_decoder_set_filename().
- *
- * default c "-"
- * param decoder A decoder instance to set.
- * param value The input file name, or "-" for c stdin.
- * assert
- * code decoder != NULL endcode
- * code value != NULL endcode
- * retval FLAC__bool
- * c false if the decoder is already initialized, or there was a memory
- * allocation error, else c true.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_set_filename(OggFLAC__FileDecoder *decoder, const char *value);
- /** Set the write callback.
- * This is inherited from FLAC__FileDecoder; see
- * FLAC__file_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.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_set_write_callback(OggFLAC__FileDecoder *decoder, OggFLAC__FileDecoderWriteCallback value);
- /** Set the metadata callback.
- * This is inherited from FLAC__FileDecoder; see
- * FLAC__file_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.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_set_metadata_callback(OggFLAC__FileDecoder *decoder, OggFLAC__FileDecoderMetadataCallback value);
- /** Set the error callback.
- * This is inherited from FLAC__FileDecoder; see
- * FLAC__file_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.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_set_error_callback(OggFLAC__FileDecoder *decoder, OggFLAC__FileDecoderErrorCallback 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.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_set_client_data(OggFLAC__FileDecoder *decoder, void *value);
- /** Set the serial number for the Ogg stream.
- * The default behavior is to use the serial number of the first Ogg
- * page. Setting a serial number here will explicitly specify which
- * stream is to be decoded.
- *
- * default c use serial number of first page
- * param decoder A decoder instance to set.
- * param serial_number See above.
- * assert
- * code decoder != NULL endcode
- * retval FLAC__bool
- * c false if the decoder is already initialized, else c true.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_set_serial_number(OggFLAC__FileDecoder *decoder, long serial_number);
- /** This is inherited from FLAC__FileDecoder; see
- * FLAC__file_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.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_set_metadata_respond(OggFLAC__FileDecoder *decoder, FLAC__MetadataType type);
- /** This is inherited from FLAC__FileDecoder; see
- * FLAC__file_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.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_set_metadata_respond_application(OggFLAC__FileDecoder *decoder, const FLAC__byte id[4]);
- /** This is inherited from FLAC__FileDecoder; see
- * FLAC__file_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.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_set_metadata_respond_all(OggFLAC__FileDecoder *decoder);
- /** This is inherited from FLAC__FileDecoder; see
- * FLAC__file_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.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_set_metadata_ignore(OggFLAC__FileDecoder *decoder, FLAC__MetadataType type);
- /** This is inherited from FLAC__FileDecoder; see
- * FLAC__file_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.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_set_metadata_ignore_application(OggFLAC__FileDecoder *decoder, const FLAC__byte id[4]);
- /** This is inherited from FLAC__FileDecoder; see
- * FLAC__file_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.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_set_metadata_ignore_all(OggFLAC__FileDecoder *decoder);
- /** Get the current decoder state.
- *
- * param decoder A decoder instance to query.
- * assert
- * code decoder != NULL endcode
- * retval OggFLAC__FileDecoderState
- * The current decoder state.
- */
- OggFLAC_API OggFLAC__FileDecoderState OggFLAC__file_decoder_get_state(const OggFLAC__FileDecoder *decoder);
- /** Get the state of the underlying seekable stream decoder.
- * Useful when the file decoder state is
- * c OggFLAC__FILE_DECODER_SEEKABLE_STREAM_DECODER_ERROR.
- *
- * param decoder A decoder instance to query.
- * assert
- * code decoder != NULL endcode
- * retval FLAC__FileDecoderState
- * The seekable stream decoder state.
- */
- OggFLAC_API OggFLAC__SeekableStreamDecoderState OggFLAC__file_decoder_get_seekable_stream_decoder_state(const OggFLAC__FileDecoder *decoder);
- /** Get the state of the underlying stream decoder.
- * Useful when the file decoder state is
- * c OggFLAC__FILE_DECODER_SEEKABLE_STREAM_DECODER_ERROR
- * and the seekable stream decoder state is
- * c OggFLAC__SEEKABLE_STREAM_DECODER_STREAM_DECODER_ERROR.
- *
- * param decoder A decoder instance to query.
- * assert
- * code decoder != NULL endcode
- * retval OggFLAC__StreamDecoderState
- * The stream decoder state.
- */
- OggFLAC_API OggFLAC__StreamDecoderState OggFLAC__file_decoder_get_stream_decoder_state(const OggFLAC__FileDecoder *decoder);
- /** Get the state of the underlying FLAC stream decoder.
- * Useful when the file decoder state is
- * c OggFLAC__FILE_DECODER_SEEKABLE_STREAM_DECODER_ERROR
- * and the seekable stream decoder state is
- * c OggFLAC__SEEKABLE_STREAM_DECODER_STREAM_DECODER_ERROR
- * and the stream decoder state is
- * c OggFLAC__STREAM_DECODER_FLAC_STREAM_DECODER_ERROR.
- *
- * param decoder A decoder instance to query.
- * assert
- * code decoder != NULL endcode
- * retval FLAC__StreamDecoderState
- * The FLAC stream decoder state.
- */
- OggFLAC_API FLAC__StreamDecoderState OggFLAC__file_decoder_get_FLAC_stream_decoder_state(const OggFLAC__FileDecoder *decoder);
- /** Get the current decoder state as a C string.
- * This version automatically resolves
- * c OggFLAC__FILE_DECODER_SEEKABLE_STREAM_DECODER_ERROR
- * by getting the seekable 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.
- */
- OggFLAC_API const char *OggFLAC__file_decoder_get_resolved_state_string(const OggFLAC__FileDecoder *decoder);
- /** This is inherited from FLAC__FileDecoder; see
- * FLAC__file_decoder_get_md5_checking().
- *
- * param decoder A decoder instance to query.
- * assert
- * code decoder != NULL endcode
- * retval FLAC__bool
- * See above.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_get_md5_checking(const OggFLAC__FileDecoder *decoder);
- /** This is inherited from FLAC__FileDecoder; see
- * FLAC__file_decoder_get_channels().
- *
- * param decoder A decoder instance to query.
- * assert
- * code decoder != NULL endcode
- * retval unsigned
- * See above.
- */
- OggFLAC_API unsigned OggFLAC__file_decoder_get_channels(const OggFLAC__FileDecoder *decoder);
- /** This is inherited from FLAC__FileDecoder; see
- * FLAC__file_decoder_get_channel_assignment().
- *
- * param decoder A decoder instance to query.
- * assert
- * code decoder != NULL endcode
- * retval OggFLAC__ChannelAssignment
- * See above.
- */
- OggFLAC_API FLAC__ChannelAssignment OggFLAC__file_decoder_get_channel_assignment(const OggFLAC__FileDecoder *decoder);
- /** This is inherited from FLAC__FileDecoder; see
- * FLAC__file_decoder_get_bits_per_sample().
- *
- * param decoder A decoder instance to query.
- * assert
- * code decoder != NULL endcode
- * retval unsigned
- * See above.
- */
- OggFLAC_API unsigned OggFLAC__file_decoder_get_bits_per_sample(const OggFLAC__FileDecoder *decoder);
- /** This is inherited from FLAC__FileDecoder; see
- * FLAC__file_decoder_get_sample_rate().
- *
- * param decoder A decoder instance to query.
- * assert
- * code decoder != NULL endcode
- * retval unsigned
- * See above.
- */
- OggFLAC_API unsigned OggFLAC__file_decoder_get_sample_rate(const OggFLAC__FileDecoder *decoder);
- /** This is inherited from FLAC__FileDecoder; see
- * FLAC__file_decoder_get_blocksize().
- *
- * param decoder A decoder instance to query.
- * assert
- * code decoder != NULL endcode
- * retval unsigned
- * See above.
- */
- OggFLAC_API unsigned OggFLAC__file_decoder_get_blocksize(const OggFLAC__FileDecoder *decoder);
- /** Initialize the decoder instance.
- * Should be called after OggFLAC__file_decoder_new() and
- * OggFLAC__file_decoder_set_*() but before any of the
- * OggFLAC__file_decoder_process_*() functions. Will set and return
- * the decoder state, which will be OggFLAC__FILE_DECODER_OK if
- * initialization succeeded.
- *
- * param decoder An uninitialized decoder instance.
- * assert
- * code decoder != NULL endcode
- * retval OggFLAC__FileDecoderState
- * c OggFLAC__FILE_DECODER_OK if initialization was successful; see
- * OggFLAC__FileDecoderState for the meanings of other return values.
- */
- OggFLAC_API OggFLAC__FileDecoderState OggFLAC__file_decoder_init(OggFLAC__FileDecoder *decoder);
- /** Finish the decoding process.
- * Flushes the decoding buffer, releases resources, resets the decoder
- * settings to their defaults, and returns the decoder state to
- * OggFLAC__FILE_DECODER_UNINITIALIZED.
- *
- * In the event of a prematurely-terminated decode, it is not strictly
- * necessary to call this immediately before OggFLAC__file_decoder_delete()
- * but it is good practice to match every OggFLAC__file_decoder_init() with
- * an OggFLAC__file_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.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_finish(OggFLAC__FileDecoder *decoder);
- /** This is inherited from FLAC__FileDecoder; see
- * FLAC__file_decoder_process_single().
- *
- * param decoder A decoder instance.
- * assert
- * code decoder != NULL endcode
- * retval FLAC__bool
- * See above.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_process_single(OggFLAC__FileDecoder *decoder);
- /** This is inherited from FLAC__FileDecoder; see
- * FLAC__file_decoder_process_until_end_of_metadata().
- *
- * param decoder A decoder instance.
- * assert
- * code decoder != NULL endcode
- * retval FLAC__bool
- * See above.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_process_until_end_of_metadata(OggFLAC__FileDecoder *decoder);
- /** This is inherited from FLAC__FileDecoder; see
- * FLAC__file_decoder_process_until_end_of_stream().
- *
- * param decoder A decoder instance.
- * assert
- * code decoder != NULL endcode
- * retval FLAC__bool
- * See above.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_process_until_end_of_file(OggFLAC__FileDecoder *decoder);
- /** This is inherited from OggFLAC__SeekableStreamDecoder; see
- * OggFLAC__seekable_stream_decoder_seek_absolute().
- *
- * 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.
- */
- OggFLAC_API FLAC__bool OggFLAC__file_decoder_seek_absolute(OggFLAC__FileDecoder *decoder, FLAC__uint64 sample);
- /* } */
- #ifdef __cplusplus
- }
- #endif
- #endif