ad17fd4747
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6276 a1c6a512-1295-4272-9138-f99709370657
127 lines
4.6 KiB
C
127 lines
4.6 KiB
C
/*
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Copyright (c) 2005, The Musepack Development Team
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials provided
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with the distribution.
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* Neither the name of the The Musepack Development Team nor the
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names of its contributors may be used to endorse or promote
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products derived from this software without specific prior
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written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/// \file musepack.h
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/// Top level include file for libmusepack.
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#ifndef _musepack_h_
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#define _musepack_h_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdbool.h>
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#include <stdlib.h>
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//#include <string.h>
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#include "config_types.h"
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#include "decoder.h"
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#include "math.h"
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#include "reader.h"
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#include "streaminfo.h"
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enum {
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MPC_FRAME_LENGTH = (36 * 32), /// samples per mpc frame
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MPC_DECODER_BUFFER_LENGTH = 4 * MPC_FRAME_LENGTH /// required buffer size for decoder
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};
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// error codes
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#define ERROR_CODE_OK 0
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#define ERROR_CODE_FILE -1
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#define ERROR_CODE_SV7BETA 1
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#define ERROR_CODE_CBR 2
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#define ERROR_CODE_IS 3
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#define ERROR_CODE_BLOCKSIZE 4
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#define ERROR_CODE_INVALIDSV 5
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/// Initializes a streaminfo structure.
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/// \param si streaminfo structure to initialize
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void mpc_streaminfo_init(mpc_streaminfo *si);
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/// Reads streaminfo header from the mpc stream supplied by r.
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/// \param si streaminfo pointer to which info will be written
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/// \param r stream reader to supply raw data
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/// \return error code
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mpc_int32_t mpc_streaminfo_read(mpc_streaminfo *si, mpc_reader *r);
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/// Gets length of stream si, in seconds.
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/// \return length of stream in seconds
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double mpc_streaminfo_get_length(mpc_streaminfo *si);
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/// Returns length of stream si, in samples.
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/// \return length of stream in samples
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mpc_int64_t mpc_streaminfo_get_length_samples(mpc_streaminfo *si);
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/// Sets up decoder library.
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/// Call this first when preparing to decode an mpc stream.
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/// \param r reader that will supply raw data to the decoder
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void mpc_decoder_setup(mpc_decoder *d, mpc_reader *r);
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/// Initializes mpc decoder with the supplied stream info parameters.
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/// Call this next after calling mpc_decoder_setup.
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/// \param si streaminfo structure indicating format of source stream
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/// \return TRUE if decoder was initalized successfully, FALSE otherwise
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bool mpc_decoder_initialize(mpc_decoder *d, mpc_streaminfo *si);
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/// Sets decoder sample scaling factor. All decoded samples will be multiplied
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/// by this factor.
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/// \param scale_factor multiplicative scaling factor
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void mpc_decoder_scale_output(mpc_decoder *d, double scale_factor);
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/// Actually reads data from previously initialized stream. Call
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/// this iteratively to decode the mpc stream.
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/// \param buffer destination buffer for decoded samples
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/// \param vbr_update_acc \todo document me
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/// \param vbr_update_bits \todo document me
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/// \return -1 if an error is encountered
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/// \return 0 if the stream has been completely decoded successfully and there are no more samples
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/// \return > 0 to indicate the number of bytes that were actually read from the stream.
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mpc_uint32_t mpc_decoder_decode(
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mpc_decoder *d,
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MPC_SAMPLE_FORMAT *buffer,
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mpc_uint32_t *vbr_update_acc,
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mpc_uint32_t *vbr_update_bits);
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/// Seeks to the specified sample in the source stream.
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bool mpc_decoder_seek_sample(mpc_decoder *d, mpc_int64_t destsample);
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/// Seeks to specified position in seconds in the source stream.
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bool mpc_decoder_seek_seconds(mpc_decoder *d, double seconds);
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#ifdef __cplusplus
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}
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#endif // __cplusplus
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#endif // _musepack_h_
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