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16bb8247b4
These arrays are used by the Musepack decoders, the MPEG audio decoders as well as qdm2 and up until now, these arrays might be initialized more than once, leading to potential data races as well as unnecessary initializations. Therefore this commit ensures that each array will only be initialized once. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
76 lines
2.1 KiB
C
76 lines
2.1 KiB
C
/*
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* Musepack decoder
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* Copyright (c) 2006 Konstantin Shishkov
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Musepack decoder
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* MPEG Audio Layer 1/2 -like codec with frames of 1152 samples
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* divided into 32 subbands.
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*/
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#ifndef AVCODEC_MPC_H
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#define AVCODEC_MPC_H
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#include "libavutil/lfg.h"
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#include "avcodec.h"
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#include "bswapdsp.h"
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#include "mpegaudio.h"
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#include "mpegaudiodsp.h"
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#define BANDS 32
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#define SAMPLES_PER_BAND 36
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#define MPC_FRAME_SIZE (BANDS * SAMPLES_PER_BAND)
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/** Subband structure - hold all variables for each subband */
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typedef struct Band {
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int msf; ///< mid-stereo flag
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int res[2];
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int scfi[2];
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int scf_idx[2][3];
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int Q[2];
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}Band;
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typedef struct MPCContext {
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BswapDSPContext bdsp;
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MPADSPContext mpadsp;
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int IS, MSS, gapless;
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int lastframelen;
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int maxbands, last_max_band;
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int last_bits_used;
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int oldDSCF[2][BANDS];
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Band bands[BANDS];
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int Q[2][MPC_FRAME_SIZE];
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int cur_frame, frames;
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uint8_t *bits;
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int buf_size;
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AVLFG rnd;
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int frames_to_skip;
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/* for synthesis */
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DECLARE_ALIGNED(16, MPA_INT, synth_buf)[MPA_MAX_CHANNELS][512*2];
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int synth_buf_offset[MPA_MAX_CHANNELS];
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DECLARE_ALIGNED(16, int32_t, sb_samples)[MPA_MAX_CHANNELS][36][SBLIMIT];
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} MPCContext;
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void ff_mpc_dequantize_and_synth(MPCContext *c, int maxband, int16_t **out, int channels);
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#endif /* AVCODEC_MPC_H */
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