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Diffstat (limited to 'drivers/mpc/decoder.h')
| -rw-r--r-- | drivers/mpc/decoder.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/drivers/mpc/decoder.h b/drivers/mpc/decoder.h new file mode 100644 index 0000000000..3813fc02ea --- /dev/null +++ b/drivers/mpc/decoder.h @@ -0,0 +1,101 @@ +/* + Copyright (c) 2005-2009, The Musepack Development Team + All rights reserved. + + 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 The Musepack Development Team 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 COPYRIGHT + OWNER 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. +*/ +/// \file decoder.h +#ifndef _MPCDEC_DECODER_H_ +#define _MPCDEC_DECODER_H_ +#ifdef WIN32 +#pragma once +#endif + +#include <mpc/reader.h> + +#ifdef __cplusplus +extern "C" { +#endif + +#define SEEKING_TABLE_SIZE 256u +// set it to SLOW_SEEKING_WINDOW to not use fast seeking +#define FAST_SEEKING_WINDOW 32 +// set it to FAST_SEEKING_WINDOW to only use fast seeking +#define SLOW_SEEKING_WINDOW 0x80000000 + +enum { + MPC_V_MEM = 2304, + MPC_DECODER_MEMSIZE = 16384, // overall buffer size +}; + +struct mpc_decoder_t { + /// @name internal state variables + //@{ + mpc_uint32_t stream_version; ///< Streamversion of stream + mpc_int32_t max_band; ///< Maximum band-index used in stream (0...31) + mpc_uint32_t ms; ///< Mid/side stereo (0: off, 1: on) + mpc_uint32_t channels; ///< Number of channels in stream + + mpc_uint64_t samples; ///< Number of samples in stream + + mpc_uint64_t decoded_samples; ///< Number of samples decoded from file begining + mpc_uint32_t samples_to_skip; ///< Number samples to skip (used for seeking) + mpc_int32_t last_max_band; ///< number of bands used in the last frame + + // randomizer state variables + mpc_uint32_t __r1; + mpc_uint32_t __r2; + + mpc_int32_t SCF_Index_L [32] [3]; + mpc_int32_t SCF_Index_R [32] [3]; // holds scalefactor-indices + mpc_quantizer Q [32]; // holds quantized samples + mpc_int32_t Res_L [32]; + mpc_int32_t Res_R [32]; // holds the chosen quantizer for each subband + mpc_bool_t DSCF_Flag_L [32]; + mpc_bool_t DSCF_Flag_R [32]; // differential SCF used? + mpc_int32_t SCFI_L [32]; + mpc_int32_t SCFI_R [32]; // describes order of transmitted SCF + mpc_bool_t MS_Flag[32]; // MS used? +#ifdef MPC_FIXED_POINT + mpc_uint8_t SCF_shift[256]; +#endif + + MPC_SAMPLE_FORMAT V_L[MPC_V_MEM + 960]; + MPC_SAMPLE_FORMAT V_R[MPC_V_MEM + 960]; + MPC_SAMPLE_FORMAT Y_L[36][32]; + MPC_SAMPLE_FORMAT Y_R[36][32]; + MPC_SAMPLE_FORMAT SCF[256]; ///< holds adapted scalefactors (for clipping prevention) + //@} +}; + +#ifdef __cplusplus +} +#endif +#endif |