/* libOggFLAC - Free Lossless Audio Codec + Ogg library * Copyright (C) 2002 Josh Coalson * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifndef OggFLAC__SEEKABLE_STREAM_DECODER_H #define OggFLAC__SEEKABLE_STREAM_DECODER_H #include "export.h" #include "FLAC/seekable_stream_decoder.h" #ifdef __cplusplus extern "C" { #endif /** \file include/OggFLAC/seekable_stream_decoder.h * * \brief * This module contains the functions which implement the seekable stream * decoder. * * See the detailed documentation in the * \link oggflac_seekable_stream_decoder seekable stream decoder \endlink module. */ /** \defgroup oggflac_seekable_stream_decoder OggFLAC/seekable_stream_decoder.h: seekable stream decoder interface * \ingroup oggflac_decoder * * \brief * This module contains the functions which implement the seekable stream * decoder. * * The interface here is identical to FLAC's seekable stream decoder. See the * defaults, including the callbacks. See the \link flac_seekable_stream_decoder * FLAC seekable stream decoder module \endlink for full documentation. * * \{ */ /** State values for an OggFLAC__SeekableStreamDecoder * * The decoder's state can be obtained by calling OggFLAC__seekable_stream_decoder_get_state(). */ typedef enum { OggFLAC__SEEKABLE_STREAM_DECODER_OK = 0, /**< The decoder is in the normal OK state. */ OggFLAC__SEEKABLE_STREAM_DECODER_FLAC_SEEKABLE_STREAM_DECODER_ERROR, /**< An error occurred in the underlying FLAC seekable stream decoder; * check OggFLAC__seekable_stream_decoder_get_FLAC_seekable_stream_decoder_state(). */ OggFLAC__SEEKABLE_STREAM_DECODER_INVALID_CALLBACK, /**< The decoder was initialized before setting all the required callbacks. */ OggFLAC__SEEKABLE_STREAM_DECODER_MEMORY_ALLOCATION_ERROR, /**< Memory allocation failed. */ OggFLAC__SEEKABLE_STREAM_DECODER_ALREADY_INITIALIZED, /**< OggFLAC__seekable_stream_decoder_init() was called when the decoder was * already initialized, usually because * OggFLAC__seekable_stream_decoder_finish() was not called. */ OggFLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED /**< The decoder is in the uninitialized state. */ } OggFLAC__SeekableStreamDecoderState; /** Maps an OggFLAC__SeekableStreamDecoderState to a C string. * * Using an OggFLAC__SeekableStreamDecoderState as the index to this array * will give the string equivalent. The contents should not be modified. */ extern OggFLAC_API const char * const OggFLAC__SeekableStreamDecoderStateString[]; /*********************************************************************** * * class OggFLAC__SeekableStreamDecoder : public FLAC__StreamDecoder * ***********************************************************************/ struct OggFLAC__SeekableStreamDecoderProtected; struct OggFLAC__SeekableStreamDecoderPrivate; /** The opaque structure definition for the seekable stream decoder type. * See the * \link oggflac_seekable_stream_decoder seekable stream decoder module \endlink * for a detailed description. */ typedef struct { struct OggFLAC__SeekableStreamDecoderProtected *protected_; /* avoid the C++ keyword 'protected' */ struct OggFLAC__SeekableStreamDecoderPrivate *private_; /* avoid the C++ keyword 'private' */ } OggFLAC__SeekableStreamDecoder; /*@@@ document */ typedef FLAC__SeekableStreamDecoderReadStatus (*OggFLAC__SeekableStreamDecoderReadCallback)(const OggFLAC__SeekableStreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data); typedef FLAC__SeekableStreamDecoderSeekStatus (*OggFLAC__SeekableStreamDecoderSeekCallback)(const OggFLAC__SeekableStreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data); typedef FLAC__SeekableStreamDecoderTellStatus (*OggFLAC__SeekableStreamDecoderTellCallback)(const OggFLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data); typedef FLAC__SeekableStreamDecoderLengthStatus (*OggFLAC__SeekableStreamDecoderLengthCallback)(const OggFLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data); typedef FLAC__bool (*OggFLAC__SeekableStreamDecoderEofCallback)(const OggFLAC__SeekableStreamDecoder *decoder, void *client_data); typedef FLAC__StreamDecoderWriteStatus (*OggFLAC__SeekableStreamDecoderWriteCallback)(const OggFLAC__SeekableStreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data); typedef void (*OggFLAC__SeekableStreamDecoderMetadataCallback)(const OggFLAC__SeekableStreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data); typedef void (*OggFLAC__SeekableStreamDecoderErrorCallback)(const OggFLAC__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 * OggFLAC__seekable_stream_decoder_set_*() functions for each setting's * default. * * \retval OggFLAC__SeekableStreamDecoder* * \c NULL if there was an error allocating memory, else the new instance. */ OggFLAC_API OggFLAC__SeekableStreamDecoder *OggFLAC__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 */ OggFLAC_API void OggFLAC__seekable_stream_decoder_delete(OggFLAC__SeekableStreamDecoder *decoder); /*********************************************************************** * * Public class method prototypes * ***********************************************************************/ /*@@@inherit set_serial_number*/ /** Set the "MD5 signature checking" flag. * This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_decoder_set_md5_checking(). * * \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. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_set_md5_checking(OggFLAC__SeekableStreamDecoder *decoder, FLAC__bool value); /** Set the read callback. * This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_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. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_set_read_callback(OggFLAC__SeekableStreamDecoder *decoder, OggFLAC__SeekableStreamDecoderReadCallback value); /** Set the seek callback. * This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_decoder_set_seek_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__seekable_stream_decoder_set_seek_callback(OggFLAC__SeekableStreamDecoder *decoder, OggFLAC__SeekableStreamDecoderSeekCallback value); /** Set the tell callback. * This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_decoder_set_tell_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__seekable_stream_decoder_set_tell_callback(OggFLAC__SeekableStreamDecoder *decoder, OggFLAC__SeekableStreamDecoderTellCallback value); /** Set the length callback. * This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_decoder_set_length_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__seekable_stream_decoder_set_length_callback(OggFLAC__SeekableStreamDecoder *decoder, OggFLAC__SeekableStreamDecoderLengthCallback value); /** Set the eof callback. * This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_decoder_set_eof_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__seekable_stream_decoder_set_eof_callback(OggFLAC__SeekableStreamDecoder *decoder, OggFLAC__SeekableStreamDecoderEofCallback value); /** Set the write callback. * This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_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. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_set_write_callback(OggFLAC__SeekableStreamDecoder *decoder, OggFLAC__SeekableStreamDecoderWriteCallback value); /** Set the metadata callback. * This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_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. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_set_metadata_callback(OggFLAC__SeekableStreamDecoder *decoder, OggFLAC__SeekableStreamDecoderMetadataCallback value); /** Set the error callback. * This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_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. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_set_error_callback(OggFLAC__SeekableStreamDecoder *decoder, OggFLAC__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. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_set_client_data(OggFLAC__SeekableStreamDecoder *decoder, void *value); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_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. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_set_metadata_respond(OggFLAC__SeekableStreamDecoder *decoder, OggFLAC__MetadataType type); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_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. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_set_metadata_respond_application(OggFLAC__SeekableStreamDecoder *decoder, const FLAC__byte id[4]); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_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. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_set_metadata_respond_all(OggFLAC__SeekableStreamDecoder *decoder); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_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. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_set_metadata_ignore(OggFLAC__SeekableStreamDecoder *decoder, OggFLAC__MetadataType type); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_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. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_set_metadata_ignore_application(OggFLAC__SeekableStreamDecoder *decoder, const FLAC__byte id[4]); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_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. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_set_metadata_ignore_all(OggFLAC__SeekableStreamDecoder *decoder); /** Get the current decoder state. * * \param decoder A decoder instance to query. * \assert * \code decoder != NULL \endcode * \retval OggFLAC__SeekableStreamDecoderState * The current decoder state. */ OggFLAC_API OggFLAC__SeekableStreamDecoderState OggFLAC__seekable_stream_decoder_get_state(const OggFLAC__SeekableStreamDecoder *decoder); /** Get the state of the underlying FLAC seekable stream decoder. * Useful when the seekable stream decoder state is * \c OggFLAC__SEEKABLE_STREAM_DECODER_FLAC_SEEKABLE_STREAM_DECODER_ERROR. * * \param decoder A decoder instance to query. * \assert * \code decoder != NULL \endcode * \retval FLAC__SeekableStreamDecoderState * The FLAC seekable stream decoder state. */ OggFLAC_API FLAC__SeekableStreamDecoderState OggFLAC__seekable_stream_decoder_get_FLAC_seekable_stream_decoder_state(const OggFLAC__SeekableStreamDecoder *decoder); /** Get the state of the underlying FLAC seekable stream decoder's stream decoder. * Useful when the seekable stream decoder state is * \c OggFLAC__SEEKABLE_STREAM_DECODER_FLAC_SEEKABLE_STREAM_DECODER_ERROR and the * FLAC 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 FLAC stream decoder state. */ OggFLAC_API FLAC__StreamDecoderState OggFLAC__seekable_stream_decoder_get_FLAC_stream_decoder_state(const OggFLAC__SeekableStreamDecoder *decoder); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_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__seekable_stream_decoder_get_md5_checking(const OggFLAC__SeekableStreamDecoder *decoder); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_decoder_get_channels(). * * \param decoder A decoder instance to query. * \assert * \code decoder != NULL \endcode * \retval unsigned * See above. */ OggFLAC_API unsigned OggFLAC__seekable_stream_decoder_get_channels(const OggFLAC__SeekableStreamDecoder *decoder); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_decoder_get_channel_assignment(). * * \param decoder A decoder instance to query. * \assert * \code decoder != NULL \endcode * \retval OggFLAC__ChannelAssignment * See above. */ OggFLAC_API OggFLAC__ChannelAssignment OggFLAC__seekable_stream_decoder_get_channel_assignment(const OggFLAC__SeekableStreamDecoder *decoder); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_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__seekable_stream_decoder_get_bits_per_sample(const OggFLAC__SeekableStreamDecoder *decoder); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_decoder_get_sample_rate(). * * \param decoder A decoder instance to query. * \assert * \code decoder != NULL \endcode * \retval unsigned * See above. */ OggFLAC_API unsigned OggFLAC__seekable_stream_decoder_get_sample_rate(const OggFLAC__SeekableStreamDecoder *decoder); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_decoder_get_blocksize(). * * \param decoder A decoder instance to query. * \assert * \code decoder != NULL \endcode * \retval unsigned * See above. */ OggFLAC_API unsigned OggFLAC__seekable_stream_decoder_get_blocksize(const OggFLAC__SeekableStreamDecoder *decoder); /** Initialize the decoder instance. * Should be called after OggFLAC__seekable_stream_decoder_new() and * OggFLAC__seekable_stream_decoder_set_*() but before any of the * OggFLAC__seekable_stream_decoder_process_*() functions. Will set and return * the decoder state, which will be OggFLAC__SEEKABLE_STREAM_DECODER_OK * if initialization succeeded. * * \param decoder An uninitialized decoder instance. * \assert * \code decoder != NULL \endcode * \retval OggFLAC__SeekableStreamDecoderState * \c OggFLAC__SEEKABLE_STREAM_DECODER_OK if initialization was * successful; see OggFLAC__SeekableStreamDecoderState for the meanings * of other return values. */ OggFLAC_API OggFLAC__SeekableStreamDecoderState OggFLAC__seekable_stream_decoder_init(OggFLAC__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 * OggFLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED. * * In the event of a prematurely-terminated decode, it is not strictly * necessary to call this immediately before * OggFLAC__seekable_stream_decoder_delete() but it is good practice to match * every OggFLAC__seekable_stream_decoder_init() with a * OggFLAC__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. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_finish(OggFLAC__SeekableStreamDecoder *decoder); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_decoder_flush(). * * \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. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_flush(OggFLAC__SeekableStreamDecoder *decoder); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_decoder_reset(). * * \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. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_reset(OggFLAC__SeekableStreamDecoder *decoder); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_decoder_process_single(). * * \param decoder A decoder instance. * \assert * \code decoder != NULL \endcode * \retval FLAC__bool * See above. */ OggFLAC_API FLAC__bool OggFLAC__seekable_stream_decoder_process_single(OggFLAC__SeekableStreamDecoder *decoder); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_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__seekable_stream_decoder_process_until_end_of_metadata(OggFLAC__SeekableStreamDecoder *decoder); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__seekable_stream_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__seekable_stream_decoder_process_until_end_of_stream(OggFLAC__SeekableStreamDecoder *decoder); /** This is inherited from FLAC__SeekableStreamDecoder; see * FLAC__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__seekable_stream_decoder_seek_absolute(OggFLAC__SeekableStreamDecoder *decoder, FLAC__uint64 sample); /* \} */ #ifdef __cplusplus } #endif #endif