stream_decoder.h

这是著名的TCPMP播放器在WINDWOWS,和WINCE下编译通过的源程序.笔者对其中的LIBMAD库做了针对ARM MPU的优化. 并增加了词幕功能.

 * \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__stream_decoder_set_client_data(OggFLAC__StreamDecoder *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__stream_decoder_set_serial_number(OggFLAC__StreamDecoder *decoder, long serial_number);

/** Direct the decoder to pass on all metadata blocks of type \a type.
 * 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.
 */
OggFLAC_API FLAC__bool OggFLAC__stream_decoder_set_metadata_respond(OggFLAC__StreamDecoder *decoder, FLAC__MetadataType type);

/** Direct the decoder to pass on all APPLICATION metadata blocks of the
 *  given \a id.
 * 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.
 */
OggFLAC_API FLAC__bool OggFLAC__stream_decoder_set_metadata_respond_application(OggFLAC__StreamDecoder *decoder, const FLAC__byte id[4]);

/** Direct the decoder to pass on all metadata blocks of any type.
 * 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.
 */
OggFLAC_API FLAC__bool OggFLAC__stream_decoder_set_metadata_respond_all(OggFLAC__StreamDecoder *decoder);

/** Direct the decoder to filter out all metadata blocks of type \a type.
 * 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.
 */
OggFLAC_API FLAC__bool OggFLAC__stream_decoder_set_metadata_ignore(OggFLAC__StreamDecoder *decoder, FLAC__MetadataType type);

/** Direct the decoder to filter out all APPLICATION metadata blocks of
 *  the given \a id.
 * 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.
 */
OggFLAC_API FLAC__bool OggFLAC__stream_decoder_set_metadata_ignore_application(OggFLAC__StreamDecoder *decoder, const FLAC__byte id[4]);

/** Direct the decoder to filter out all metadata blocks of any type.
 * 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.
 */
OggFLAC_API FLAC__bool OggFLAC__stream_decoder_set_metadata_ignore_all(OggFLAC__StreamDecoder *decoder);

/** Get the current decoder state.
 *
 * \param  decoder  A decoder instance to query.
 * \assert
 *    \code decoder != NULL \endcode
 * \retval OggFLAC__StreamDecoderState
 *    The current decoder state.
 */
OggFLAC_API OggFLAC__StreamDecoderState OggFLAC__stream_decoder_get_state(const OggFLAC__StreamDecoder *decoder);

/** Get the state of the underlying FLAC stream decoder.
 *  Useful when 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__stream_decoder_get_FLAC_stream_decoder_state(const OggFLAC__StreamDecoder *decoder);

/** Get the current decoder state as a C string.
 *  This version automatically resolves
 *  \c OggFLAC__STREAM_DECODER_FLAC_STREAM_DECODER_ERROR
 *  by getting the FLAC 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__stream_decoder_get_resolved_state_string(const OggFLAC__StreamDecoder *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.
 */
OggFLAC_API unsigned OggFLAC__stream_decoder_get_channels(const OggFLAC__StreamDecoder *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 OggFLAC__ChannelAssignment
 *    See above.
 */
OggFLAC_API FLAC__ChannelAssignment OggFLAC__stream_decoder_get_channel_assignment(const OggFLAC__StreamDecoder *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.
 */
OggFLAC_API unsigned OggFLAC__stream_decoder_get_bits_per_sample(const OggFLAC__StreamDecoder *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.
 */
OggFLAC_API unsigned OggFLAC__stream_decoder_get_sample_rate(const OggFLAC__StreamDecoder *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.
 */
OggFLAC_API unsigned OggFLAC__stream_decoder_get_blocksize(const OggFLAC__StreamDecoder *decoder);

/** Initialize the decoder instance.
 *  Should be called after OggFLAC__stream_decoder_new() and
 *  OggFLAC__stream_decoder_set_*() but before any of the
 *  OggFLAC__stream_decoder_process_*() functions.  Will set and return the
 *  decoder state, which will be OggFLAC__STREAM_DECODER_OK
 *  if initialization succeeded.
 *
 * \param  decoder  An uninitialized decoder instance.
 * \assert
 *    \code decoder != NULL \endcode
 * \retval OggFLAC__StreamDecoderState
 *    \c OggFLAC__STREAM_DECODER_OK if initialization was
 *    successful; see OggFLAC__StreamDecoderState for the meanings of other
 *    return values.
 */
OggFLAC_API OggFLAC__StreamDecoderState OggFLAC__stream_decoder_init(OggFLAC__StreamDecoder *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__STREAM_DECODER_UNINITIALIZED.
 *
 *  In the event of a prematurely-terminated decode, it is not strictly
 *  necessary to call this immediately before OggFLAC__stream_decoder_delete()
 *  but it is good practice to match every OggFLAC__stream_decoder_init()
 *  with an OggFLAC__stream_decoder_finish().
 *
 * \param  decoder  An uninitialized decoder instance.
 * \assert
 *    \code decoder != NULL \endcode
 */
OggFLAC_API void OggFLAC__stream_decoder_finish(OggFLAC__StreamDecoder *decoder);

/** This is inherited from FLAC__StreamDecoder; see FLAC__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
 *    error occurs.
 */
OggFLAC_API FLAC__bool OggFLAC__stream_decoder_flush(OggFLAC__StreamDecoder *decoder);

/** This is inherited from FLAC__StreamDecoder; see FLAC__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
 *    error occurs.
 */
OggFLAC_API FLAC__bool OggFLAC__stream_decoder_reset(OggFLAC__StreamDecoder *decoder);

/** Decode one metadata block or audio frame.
 *  This is inherited from FLAC__StreamDecoder; see FLAC__stream_decoder_process_single()
 *
 * \param  decoder  An initialized decoder instance in the state
 *                  \c OggFLAC__STREAM_DECODER_OK.
 * \assert
 *    \code decoder != NULL \endcode
 *    \code OggFLAC__stream_decoder_get_state(decoder) == OggFLAC__STREAM_DECODER_OK \endcode
 * \retval FLAC__bool
 *    \c false if any read or write error occurred (except
 *    \c FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC), else \c true;
 *    in any case, check the decoder state with
 *    OggFLAC__stream_decoder_get_state() to see what went wrong or to
 *    check for lost synchronization (a sign of stream corruption).
 */
OggFLAC_API FLAC__bool OggFLAC__stream_decoder_process_single(OggFLAC__StreamDecoder *decoder);

/** Decode until the end of the metadata.
 *  This is inherited from FLAC__StreamDecoder; see FLAC__stream_decoder_process_until_end_of_metadata()
 *
 * \param  decoder  An initialized decoder instance in the state
 *                  \c OggFLAC__STREAM_DECODER_OK.
 * \assert
 *    \code decoder != NULL \endcode
 *    \code OggFLAC__stream_decoder_get_state(decoder) == OggFLAC__STREAM_DECODER_OK \endcode
 * \retval FLAC__bool
 *    \c false if any read or write error occurred (except
 *    \c OggFLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC), else \c true;
 *    in any case, check the decoder state with
 *    OggFLAC__stream_decoder_get_state() to see what went wrong or to
 *    check for lost synchronization (a sign of stream corruption).
 */
OggFLAC_API FLAC__bool OggFLAC__stream_decoder_process_until_end_of_metadata(OggFLAC__StreamDecoder *decoder);

/** Decode until the end of the stream.
 *  This is inherited from FLAC__StreamDecoder; see FLAC__stream_decoder_process_until_end_of_stream()
 *
 * \param  decoder  An initialized decoder instance in the state
 *                  \c OggFLAC__STREAM_DECODER_OK.
 * \assert
 *    \code decoder != NULL \endcode
 *    \code OggFLAC__stream_decoder_get_state(decoder) == OggFLAC__STREAM_DECODER_OK \endcode
 * \retval FLAC__bool
 *    \c false if any read or write error occurred (except
 *    \c OggFLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC), else \c true;
 *    in any case, check the decoder state with
 *    OggFLAC__stream_decoder_get_state() to see what went wrong or to
 *    check for lost synchronization (a sign of stream corruption).
 */
OggFLAC_API FLAC__bool OggFLAC__stream_decoder_process_until_end_of_stream(OggFLAC__StreamDecoder *decoder);

/* \} */

#ifdef __cplusplus
}
#endif

#endif