229 lines
8.7 KiB
C
229 lines
8.7 KiB
C
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/*
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* DCA compatible decoder
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* Copyright (C) 2004 Gildas Bazin
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* Copyright (C) 2004 Benjamin Zores
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* Copyright (C) 2006 Benjamin Larsson
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* Copyright (C) 2007 Konstantin Shishkov
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* Copyright (C) 2016 foo86
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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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#ifndef AVCODEC_DCA_H
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#define AVCODEC_DCA_H
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#include <stdint.h>
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#include "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#include "get_bits.h"
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#include "internal.h"
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#define DCA_CORE_FRAME_HEADER_SIZE 18
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enum DCAParseError {
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DCA_PARSE_ERROR_SYNC_WORD = -1,
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DCA_PARSE_ERROR_DEFICIT_SAMPLES = -2,
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DCA_PARSE_ERROR_PCM_BLOCKS = -3,
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DCA_PARSE_ERROR_FRAME_SIZE = -4,
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DCA_PARSE_ERROR_AMODE = -5,
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DCA_PARSE_ERROR_SAMPLE_RATE = -6,
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DCA_PARSE_ERROR_RESERVED_BIT = -7,
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DCA_PARSE_ERROR_LFE_FLAG = -8,
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DCA_PARSE_ERROR_PCM_RES = -9,
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};
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typedef struct DCACoreFrameHeader {
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uint8_t normal_frame; ///< Frame type
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uint8_t deficit_samples; ///< Deficit sample count
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uint8_t crc_present; ///< CRC present flag
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uint8_t npcmblocks; ///< Number of PCM sample blocks
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uint16_t frame_size; ///< Primary frame byte size
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uint8_t audio_mode; ///< Audio channel arrangement
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uint8_t sr_code; ///< Core audio sampling frequency
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uint8_t br_code; ///< Transmission bit rate
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uint8_t drc_present; ///< Embedded dynamic range flag
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uint8_t ts_present; ///< Embedded time stamp flag
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uint8_t aux_present; ///< Auxiliary data flag
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uint8_t hdcd_master; ///< HDCD mastering flag
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uint8_t ext_audio_type; ///< Extension audio descriptor flag
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uint8_t ext_audio_present; ///< Extended coding flag
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uint8_t sync_ssf; ///< Audio sync word insertion flag
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uint8_t lfe_present; ///< Low frequency effects flag
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uint8_t predictor_history; ///< Predictor history flag switch
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uint8_t filter_perfect; ///< Multirate interpolator switch
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uint8_t encoder_rev; ///< Encoder software revision
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uint8_t copy_hist; ///< Copy history
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uint8_t pcmr_code; ///< Source PCM resolution
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uint8_t sumdiff_front; ///< Front sum/difference flag
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uint8_t sumdiff_surround; ///< Surround sum/difference flag
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uint8_t dn_code; ///< Dialog normalization / unspecified
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} DCACoreFrameHeader;
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enum DCASpeaker {
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DCA_SPEAKER_C, DCA_SPEAKER_L, DCA_SPEAKER_R, DCA_SPEAKER_Ls,
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DCA_SPEAKER_Rs, DCA_SPEAKER_LFE1, DCA_SPEAKER_Cs, DCA_SPEAKER_Lsr,
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DCA_SPEAKER_Rsr, DCA_SPEAKER_Lss, DCA_SPEAKER_Rss, DCA_SPEAKER_Lc,
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DCA_SPEAKER_Rc, DCA_SPEAKER_Lh, DCA_SPEAKER_Ch, DCA_SPEAKER_Rh,
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DCA_SPEAKER_LFE2, DCA_SPEAKER_Lw, DCA_SPEAKER_Rw, DCA_SPEAKER_Oh,
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DCA_SPEAKER_Lhs, DCA_SPEAKER_Rhs, DCA_SPEAKER_Chr, DCA_SPEAKER_Lhr,
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DCA_SPEAKER_Rhr, DCA_SPEAKER_Cl, DCA_SPEAKER_Ll, DCA_SPEAKER_Rl,
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DCA_SPEAKER_RSV1, DCA_SPEAKER_RSV2, DCA_SPEAKER_RSV3, DCA_SPEAKER_RSV4,
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DCA_SPEAKER_COUNT
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};
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enum DCASpeakerMask {
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DCA_SPEAKER_MASK_C = 0x00000001,
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DCA_SPEAKER_MASK_L = 0x00000002,
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DCA_SPEAKER_MASK_R = 0x00000004,
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DCA_SPEAKER_MASK_Ls = 0x00000008,
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DCA_SPEAKER_MASK_Rs = 0x00000010,
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DCA_SPEAKER_MASK_LFE1 = 0x00000020,
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DCA_SPEAKER_MASK_Cs = 0x00000040,
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DCA_SPEAKER_MASK_Lsr = 0x00000080,
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DCA_SPEAKER_MASK_Rsr = 0x00000100,
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DCA_SPEAKER_MASK_Lss = 0x00000200,
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DCA_SPEAKER_MASK_Rss = 0x00000400,
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DCA_SPEAKER_MASK_Lc = 0x00000800,
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DCA_SPEAKER_MASK_Rc = 0x00001000,
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DCA_SPEAKER_MASK_Lh = 0x00002000,
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DCA_SPEAKER_MASK_Ch = 0x00004000,
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DCA_SPEAKER_MASK_Rh = 0x00008000,
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DCA_SPEAKER_MASK_LFE2 = 0x00010000,
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DCA_SPEAKER_MASK_Lw = 0x00020000,
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DCA_SPEAKER_MASK_Rw = 0x00040000,
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DCA_SPEAKER_MASK_Oh = 0x00080000,
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DCA_SPEAKER_MASK_Lhs = 0x00100000,
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DCA_SPEAKER_MASK_Rhs = 0x00200000,
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DCA_SPEAKER_MASK_Chr = 0x00400000,
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DCA_SPEAKER_MASK_Lhr = 0x00800000,
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DCA_SPEAKER_MASK_Rhr = 0x01000000,
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DCA_SPEAKER_MASK_Cl = 0x02000000,
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DCA_SPEAKER_MASK_Ll = 0x04000000,
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DCA_SPEAKER_MASK_Rl = 0x08000000,
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};
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#define DCA_SPEAKER_LAYOUT_MONO (DCA_SPEAKER_MASK_C)
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#define DCA_SPEAKER_LAYOUT_STEREO (DCA_SPEAKER_MASK_L | DCA_SPEAKER_MASK_R)
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#define DCA_SPEAKER_LAYOUT_2POINT1 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_LFE1)
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#define DCA_SPEAKER_LAYOUT_3_0 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_C)
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#define DCA_SPEAKER_LAYOUT_2_1 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Cs)
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#define DCA_SPEAKER_LAYOUT_3_1 (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Cs)
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#define DCA_SPEAKER_LAYOUT_2_2 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs)
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#define DCA_SPEAKER_LAYOUT_5POINT0 (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs)
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#define DCA_SPEAKER_LAYOUT_5POINT1 (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_LFE1)
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#define DCA_SPEAKER_LAYOUT_7POINT0_WIDE (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_Lw | DCA_SPEAKER_MASK_Rw)
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#define DCA_SPEAKER_LAYOUT_7POINT1_WIDE (DCA_SPEAKER_LAYOUT_7POINT0_WIDE | DCA_SPEAKER_MASK_LFE1)
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#define DCA_HAS_STEREO(mask) \
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((mask & DCA_SPEAKER_LAYOUT_STEREO) == DCA_SPEAKER_LAYOUT_STEREO)
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enum DCASpeakerPair {
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DCA_SPEAKER_PAIR_C = 0x0001,
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DCA_SPEAKER_PAIR_LR = 0x0002,
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DCA_SPEAKER_PAIR_LsRs = 0x0004,
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DCA_SPEAKER_PAIR_LFE1 = 0x0008,
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DCA_SPEAKER_PAIR_Cs = 0x0010,
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DCA_SPEAKER_PAIR_LhRh = 0x0020,
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DCA_SPEAKER_PAIR_LsrRsr = 0x0040,
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DCA_SPEAKER_PAIR_Ch = 0x0080,
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DCA_SPEAKER_PAIR_Oh = 0x0100,
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DCA_SPEAKER_PAIR_LcRc = 0x0200,
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DCA_SPEAKER_PAIR_LwRw = 0x0400,
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DCA_SPEAKER_PAIR_LssRss = 0x0800,
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DCA_SPEAKER_PAIR_LFE2 = 0x1000,
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DCA_SPEAKER_PAIR_LhsRhs = 0x2000,
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DCA_SPEAKER_PAIR_Chr = 0x4000,
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DCA_SPEAKER_PAIR_LhrRhr = 0x8000
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};
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/**
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* Return number of individual channels in DCASpeakerPair mask
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*/
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static inline int ff_dca_count_chs_for_mask(unsigned int mask)
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{
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return av_popcount((mask & 0xffff) | ((mask & 0xae66) << 16));
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}
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enum DCARepresentationType {
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DCA_REPR_TYPE_LtRt = 2,
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DCA_REPR_TYPE_LhRh = 3
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};
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enum DCAExtensionMask {
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DCA_CSS_CORE = 0x001,
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DCA_CSS_XXCH = 0x002,
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DCA_CSS_X96 = 0x004,
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DCA_CSS_XCH = 0x008,
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DCA_CSS_MASK = 0x00f,
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DCA_EXSS_CORE = 0x010,
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DCA_EXSS_XBR = 0x020,
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DCA_EXSS_XXCH = 0x040,
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DCA_EXSS_X96 = 0x080,
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DCA_EXSS_LBR = 0x100,
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DCA_EXSS_XLL = 0x200,
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DCA_EXSS_RSV1 = 0x400,
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DCA_EXSS_RSV2 = 0x800,
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DCA_EXSS_MASK = 0xff0,
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};
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enum DCADownMixType {
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DCA_DMIX_TYPE_1_0,
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DCA_DMIX_TYPE_LoRo,
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DCA_DMIX_TYPE_LtRt,
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DCA_DMIX_TYPE_3_0,
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DCA_DMIX_TYPE_2_1,
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DCA_DMIX_TYPE_2_2,
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DCA_DMIX_TYPE_3_1,
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DCA_DMIX_TYPE_COUNT
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};
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extern av_export_avcodec const uint32_t avpriv_dca_sample_rates[16];
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extern const uint32_t ff_dca_sampling_freqs[16];
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extern const uint8_t ff_dca_freq_ranges[16];
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extern const uint8_t ff_dca_bits_per_sample[8];
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/**
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* Convert bitstream to one representation based on sync marker
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*/
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int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst,
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int max_size);
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/**
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* Parse and validate core frame header
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* @param[out] h Pointer to struct where header info is written.
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* @param[in] buf Pointer to the data buffer
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* @param[in] size Size of the data buffer
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* @return 0 on success, negative AVERROR code on failure
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*/
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int avpriv_dca_parse_core_frame_header(DCACoreFrameHeader *h, const uint8_t *buf, int size);
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/**
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* Parse and validate core frame header
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* @param[out] h Pointer to struct where header info is written.
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* @param[in] gbc BitContext containing the first 120 bits of the frame.
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* @return 0 on success, negative DCA_PARSE_ERROR_ code on failure
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*/
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int ff_dca_parse_core_frame_header(DCACoreFrameHeader *h, GetBitContext *gb);
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#endif /* AVCODEC_DCA_H */
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