flac/include/OggFLAC/stream_encoder.h

/* 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__STREAM_ENCODER_H
#define OggFLAC__STREAM_ENCODER_H

#include "FLAC/stream_encoder.h"

#ifdef __cplusplus
extern "C" {
#endif


/** \file include/OggFLAC/stream_encoder.h
 *
 *  \brief
 *  This module contains the functions which implement the stream
 *  encoder.
 *
 *  See the detailed documentation in the
 *  \link oggflac_stream_encoder stream encoder \endlink module.
 */

/** \defgroup oggflac_encoder OggFLAC/ *_encoder.h: encoder interfaces
 *  \ingroup oggflac
 *
 *  \brief
 *  This module describes the three encoder layers provided by libOggFLAC.
 *
 * libOggFLAC provides the same three layers of access as libFLAC and the
 * interface is identical.  See the \link flac_encoder FLAC encoder module
 * \endlink for full documentation.
 */

/** \defgroup oggflac_stream_encoder OggFLAC/stream_encoder.h: stream encoder interface
 *  \ingroup oggflac_encoder
 *
 *  \brief
 *  This module contains the functions which implement the stream
 *  encoder.
 *
 * The interface here is identical to FLAC's stream encoder.  See the
 * defaults, including the callbacks.  See the \link flac_stream_encoder
 * FLAC stream encoder module \endlink for full documentation.
 *
 * \{
 */


/** State values for an OggFLAC__StreamEncoder
 *
 *  The encoder's state can be obtained by calling OggFLAC__stream_encoder_get_state().
 */
typedef enum {

	OggFLAC__STREAM_ENCODER_OK = 0,
	/**< The encoder is in the normal OK state. */

	OggFLAC__STREAM_ENCODER_OGG_ERROR,
	/**< An error occurred in the underlying Ogg layer.  */

	OggFLAC__STREAM_ENCODER_FLAC_STREAM_ENCODER_ERROR,
	/**< An error occurred in the underlying FLAC stream encoder;
	 * check OggFLAC__stream_encoder_get_FLAC_stream_encoder_state().
	 */

	OggFLAC__STREAM_ENCODER_INVALID_CALLBACK,
	/**< The encoder was initialized before setting all the required callbacks. */

	OggFLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR,
	/**< Memory allocation failed. */

	OggFLAC__STREAM_ENCODER_ALREADY_INITIALIZED,
	/**< OggFLAC__stream_encoder_init() was called when the encoder was
	 * already initialized, usually because
	 * OggFLAC__stream_encoder_finish() was not called.
	 */

	OggFLAC__STREAM_ENCODER_UNINITIALIZED
	/**< The encoder is in the uninitialized state. */

} OggFLAC__StreamEncoderState;

/** Maps an OggFLAC__StreamEncoderState to a C string.
 *
 *  Using an OggFLAC__StreamEncoderState as the index to this array
 *  will give the string equivalent.  The contents should not be modified.
 */
extern const char * const OggFLAC__StreamEncoderStateString[];


/***********************************************************************
 *
 * class OggFLAC__StreamEncoder
 *
 ***********************************************************************/

struct OggFLAC__StreamEncoderProtected;
struct OggFLAC__StreamEncoderPrivate;
/** The opaque structure definition for the stream encoder type.
 *  See the \link oggflac_stream_encoder stream encoder module \endlink
 *  for a detailed description.
 */
typedef struct {
	struct OggFLAC__StreamEncoderProtected *protected_; /* avoid the C++ keyword 'protected' */
	struct OggFLAC__StreamEncoderPrivate *private_; /* avoid the C++ keyword 'private' */
} OggFLAC__StreamEncoder;

/*@@@@ document: */
typedef FLAC__StreamEncoderWriteStatus (*OggFLAC__StreamEncoderWriteCallback)(const OggFLAC__StreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);


/***********************************************************************
 *
 * Class constructor/destructor
 *
 ***********************************************************************/

/** Create a new stream encoder instance.  The instance is created with
 *  default settings; see the individual OggFLAC__stream_encoder_set_*()
 *  functions for each setting's default.
 *
 * \retval OggFLAC__StreamEncoder*
 *    \c NULL if there was an error allocating memory, else the new instance.
 */
OggFLAC__StreamEncoder *OggFLAC__stream_encoder_new();

/** Free an encoder instance.  Deletes the object pointed to by \a encoder.
 *
 * \param encoder  A pointer to an existing encoder.
 * \assert
 *    \code encoder != NULL \endcode
 */
void OggFLAC__stream_encoder_delete(OggFLAC__StreamEncoder *encoder);


/***********************************************************************
 *
 * Public class method prototypes
 *
 ***********************************************************************/

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_verify()
 *
 * \default \c false
 * \param  encoder  An encoder instance to set.
 * \param  value    Flag value (see above).
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_verify(OggFLAC__StreamEncoder *encoder, FLAC__bool value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_streamable_subset()
 *
 * \default \c true
 * \param  encoder  An encoder instance to set.
 * \param  value    Flag value (see above).
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_streamable_subset(OggFLAC__StreamEncoder *encoder, FLAC__bool value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_do_mid_side_stereo()
 *
 * \default \c false
 * \param  encoder  An encoder instance to set.
 * \param  value    Flag value (see above).
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_do_mid_side_stereo(OggFLAC__StreamEncoder *encoder, FLAC__bool value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_loose_mid_side_stereo()
 *
 * \default \c false
 * \param  encoder  An encoder instance to set.
 * \param  value    Flag value (see above).
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_loose_mid_side_stereo(OggFLAC__StreamEncoder *encoder, FLAC__bool value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_channels()
 *
 * \default \c 2
 * \param  encoder  An encoder instance to set.
 * \param  value    See above.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_channels(OggFLAC__StreamEncoder *encoder, unsigned value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_bits_per_sample()
 *
 * \default \c 16
 * \param  encoder  An encoder instance to set.
 * \param  value    See above.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_bits_per_sample(OggFLAC__StreamEncoder *encoder, unsigned value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_sample_rate()
 *
 * \default \c 44100
 * \param  encoder  An encoder instance to set.
 * \param  value    See above.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_sample_rate(OggFLAC__StreamEncoder *encoder, unsigned value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_blocksize()
 *
 * \default \c 1152
 * \param  encoder  An encoder instance to set.
 * \param  value    See above.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_blocksize(OggFLAC__StreamEncoder *encoder, unsigned value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_max_lpc_order()
 *
 * \default \c 0
 * \param  encoder  An encoder instance to set.
 * \param  value    See above.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_max_lpc_order(OggFLAC__StreamEncoder *encoder, unsigned value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_qlp_coeff_precision()
 *
 * \default \c 0
 * \param  encoder  An encoder instance to set.
 * \param  value    See above.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_qlp_coeff_precision(OggFLAC__StreamEncoder *encoder, unsigned value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_qlp_coeff_prec_search()
 *
 * \default \c false
 * \param  encoder  An encoder instance to set.
 * \param  value    See above.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_do_qlp_coeff_prec_search(OggFLAC__StreamEncoder *encoder, FLAC__bool value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_do_escape_coding()
 *
 * \default \c false
 * \param  encoder  An encoder instance to set.
 * \param  value    See above.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_do_escape_coding(OggFLAC__StreamEncoder *encoder, FLAC__bool value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_do_exhaustive_model_search()
 *
 * \default \c false
 * \param  encoder  An encoder instance to set.
 * \param  value    See above.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_do_exhaustive_model_search(OggFLAC__StreamEncoder *encoder, FLAC__bool value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_min_residual_partition_order()
 *
 * \default \c 0
 * \param  encoder  An encoder instance to set.
 * \param  value    See above.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_min_residual_partition_order(OggFLAC__StreamEncoder *encoder, unsigned value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_max_residual_partition_order()
 *
 * \default \c 0
 * \param  encoder  An encoder instance to set.
 * \param  value    See above.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_max_residual_partition_order(OggFLAC__StreamEncoder *encoder, unsigned value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_rice_parameter_search_dist()
 *
 * \default \c 0
 * \param  encoder  An encoder instance to set.
 * \param  value    See above.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_rice_parameter_search_dist(OggFLAC__StreamEncoder *encoder, unsigned value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_total_samples_estimate()
 *
 * \default \c 0
 * \param  encoder  An encoder instance to set.
 * \param  value    See above.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_total_samples_estimate(OggFLAC__StreamEncoder *encoder, FLAC__uint64 value);

/** This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_set_metadata()
 *
 * \default \c NULL, 0
 * \param  encoder     An encoder instance to set.
 * \param  metadata    See above.
 * \param  num_blocks  See above.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_metadata(OggFLAC__StreamEncoder *encoder, FLAC__StreamMetadata **metadata, unsigned num_blocks);

/** Set the write callback.
 *
 * \note
 * The callback is mandatory and must be set before initialization.
 *
 * \default \c NULL
 * \param  encoder  An encoder instance to set.
 * \param  value    See above.
 * \assert
 *    \code encoder != NULL \endcode
 *    \code value != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_write_callback(OggFLAC__StreamEncoder *encoder, OggFLAC__StreamEncoderWriteCallback 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  encoder  An encoder instance to set.
 * \param  value    See above.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    \c false if the encoder is already initialized, else \c true.
 */
FLAC__bool OggFLAC__stream_encoder_set_client_data(OggFLAC__StreamEncoder *encoder, void *value);

/** Get the current encoder state.
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval OggFLAC__StreamEncoderState
 *    The current encoder state.
 */
OggFLAC__StreamEncoderState OggFLAC__stream_encoder_get_state(const OggFLAC__StreamEncoder *encoder);

/** Get the state of the underlying FLAC stream encoder.
 *  Useful when the stream encoder state is
 *  \c OggFLAC__STREAM_ENCODER_FLAC_STREAM_ENCODER_ERROR.
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__StreamEncoderState
 *    The FLAC stream encoder state.
 */
FLAC__StreamEncoderState OggFLAC__stream_encoder_get_FLAC_stream_encoder_state(const OggFLAC__StreamEncoder *encoder);

/** Get the state of the underlying FLAC stream encoder's verify decoder.
 *  Useful when the stream encoder state is
 *  \c OggFLAC__STREAM_ENCODER_FLAC_STREAM_ENCODER_ERROR and the
 *  FLAC encoder state is \c FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR.
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__StreamDecoderState
 *    The FLAC verify decoder state.
 */
FLAC__StreamDecoderState OggFLAC__stream_encoder_get_verify_decoder_state(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_verify()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    See OggFLAC__stream_encoder_set_verify().
 */
FLAC__bool OggFLAC__stream_encoder_get_verify(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_streamable_subset()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    See OggFLAC__stream_encoder_set_streamable_subset().
 */
FLAC__bool OggFLAC__stream_encoder_get_streamable_subset(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_do_mid_side_stereo()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    See OggFLAC__stream_encoder_get_do_mid_side_stereo().
 */
FLAC__bool OggFLAC__stream_encoder_get_do_mid_side_stereo(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_loose_mid_side_stereo()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    See OggFLAC__stream_encoder_set_loose_mid_side_stereo().
 */
FLAC__bool OggFLAC__stream_encoder_get_loose_mid_side_stereo(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_channels()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval unsigned
 *    See OggFLAC__stream_encoder_set_channels().
 */
unsigned OggFLAC__stream_encoder_get_channels(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_bits_per_sample()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval unsigned
 *    See OggFLAC__stream_encoder_set_bits_per_sample().
 */
unsigned OggFLAC__stream_encoder_get_bits_per_sample(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_sample_rate()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval unsigned
 *    See OggFLAC__stream_encoder_set_sample_rate().
 */
unsigned OggFLAC__stream_encoder_get_sample_rate(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_blocksize()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval unsigned
 *    See OggFLAC__stream_encoder_set_blocksize().
 */
unsigned OggFLAC__stream_encoder_get_blocksize(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_max_lpc_order()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval unsigned
 *    See OggFLAC__stream_encoder_set_max_lpc_order().
 */
unsigned OggFLAC__stream_encoder_get_max_lpc_order(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_qlp_coeff_precision()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval unsigned
 *    See OggFLAC__stream_encoder_set_qlp_coeff_precision().
 */
unsigned OggFLAC__stream_encoder_get_qlp_coeff_precision(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_do_qlp_coeff_prec_search()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    See OggFLAC__stream_encoder_set_do_qlp_coeff_prec_search().
 */
FLAC__bool OggFLAC__stream_encoder_get_do_qlp_coeff_prec_search(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_do_escape_coding()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    See OggFLAC__stream_encoder_set_do_escape_coding().
 */
FLAC__bool OggFLAC__stream_encoder_get_do_escape_coding(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_do_exhaustive_model_search()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__bool
 *    See OggFLAC__stream_encoder_set_do_exhaustive_model_search().
 */
FLAC__bool OggFLAC__stream_encoder_get_do_exhaustive_model_search(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_min_residual_partition_order()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval unsigned
 *    See OggFLAC__stream_encoder_set_min_residual_partition_order().
 */
unsigned OggFLAC__stream_encoder_get_min_residual_partition_order(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_man_residual_partition_order()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval unsigned
 *    See OggFLAC__stream_encoder_set_max_residual_partition_order().
 */
unsigned OggFLAC__stream_encoder_get_max_residual_partition_order(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_rice_parameter_search_dist()
 *
 * \param  encoder  An encoder instance to query.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval unsigned
 *    See OggFLAC__stream_encoder_set_rice_parameter_search_dist().
 */
unsigned OggFLAC__stream_encoder_get_rice_parameter_search_dist(const OggFLAC__StreamEncoder *encoder);

/* This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_get_total_samples_estimate()
 *
 * \param  encoder  An encoder instance to set.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval FLAC__uint64
 *    See OggFLAC__stream_encoder_get_total_samples_estimate().
 */
FLAC__uint64 OggFLAC__stream_encoder_get_total_samples_estimate(const OggFLAC__StreamEncoder *encoder);

/** Initialize the encoder instance.
 *  Should be called after OggFLAC__stream_encoder_new() and
 *  OggFLAC__stream_encoder_set_*() but before OggFLAC__stream_encoder_process()
 *  or OggFLAC__stream_encoder_process_interleaved().  Will set and return
 *  the encoder state, which will be OggFLAC__STREAM_ENCODER_OK if
 *  initialization succeeded.
 *
 *  The call to OggFLAC__stream_encoder_init() currently will also immediately
 *  call the write callback several times, once with the \c fLaC signature,
 *  and once for each encoded metadata block.
 *
 * \param  encoder  An uninitialized encoder instance.
 * \assert
 *    \code encoder != NULL \endcode
 * \retval OggFLAC__StreamEncoderState
 *    \c OggFLAC__STREAM_ENCODER_OK if initialization was successful; see
 *    OggFLAC__StreamEncoderState for the meanings of other return values.
 */
OggFLAC__StreamEncoderState OggFLAC__stream_encoder_init(OggFLAC__StreamEncoder *encoder);

/** Finish the encoding process.
 *  Flushes the encoding buffer, releases resources, resets the encoder
 *  settings to their defaults, and returns the encoder state to
 *  OggFLAC__STREAM_ENCODER_UNINITIALIZED.  Note that this can generate
 *  one or more write callbacks before returning.
 *
 *  In the event of a prematurely-terminated encode, it is not strictly
 *  necessary to call this immediately before OggFLAC__stream_encoder_delete()
 *  but it is good practice to match every OggFLAC__stream_encoder_init()
 *  with an OggFLAC__stream_encoder_finish().
 *
 * \param  encoder  An uninitialized encoder instance.
 * \assert
 *    \code encoder != NULL \endcode
 */
void OggFLAC__stream_encoder_finish(OggFLAC__StreamEncoder *encoder);

/** Submit data for encoding.
 * This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_process().
 *
 * \param  encoder  An initialized encoder instance in the OK state.
 * \param  buffer   An array of pointers to each channel's signal.
 * \param  samples  The number of samples in one channel.
 * \assert
 *    \code encoder != NULL \endcode
 *    \code OggFLAC__stream_encoder_get_state(encoder) == OggFLAC__STREAM_ENCODER_OK \endcode
 * \retval FLAC__bool
 *    \c true if successful, else \c false; in this case, check the
 *    encoder state with OggFLAC__stream_encoder_get_state() to see what
 *    went wrong.
 */
FLAC__bool OggFLAC__stream_encoder_process(OggFLAC__StreamEncoder *encoder, const FLAC__int32 * const buffer[], unsigned samples);

/** Submit data for encoding.
 * This is inherited from FLAC__StreamEncoder; see FLAC__stream_encoder_process_interleaved().
 *
 * \param  encoder  An initialized encoder instance in the OK state.
 * \param  buffer   An array of channel-interleaved data (see above).
 * \param  samples  The number of samples in one channel, the same as for
 *                  OggFLAC__stream_encoder_process().  For example, if
 *                  encoding two channels, \c 1000 \a samples corresponds
 *                  to a \a buffer of 2000 values.
 * \assert
 *    \code encoder != NULL \endcode
 *    \code OggFLAC__stream_encoder_get_state(encoder) == OggFLAC__STREAM_ENCODER_OK \endcode
 * \retval FLAC__bool
 *    \c true if successful, else \c false; in this case, check the
 *    encoder state with OggFLAC__stream_encoder_get_state() to see what
 *    went wrong.
 */
FLAC__bool OggFLAC__stream_encoder_process_interleaved(OggFLAC__StreamEncoder *encoder, const FLAC__int32 buffer[], unsigned samples);

/* \} */

#ifdef __cplusplus
}
#endif

#endif