/* * DCA compatible decoder * Copyright (C) 2004 Gildas Bazin * Copyright (C) 2004 Benjamin Zores * Copyright (C) 2006 Benjamin Larsson * Copyright (C) 2007 Konstantin Shishkov * Copyright (C) 2016 foo86 * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVCODEC_DCA_H#define AVCODEC_DCA_H #include <stdint.h> #include "libavutil/common.h"#include "libavutil/intreadwrite.h" #include "get_bits.h" #define DCA_CORE_FRAME_HEADER_SIZE      18 enum DCAParseError {    DCA_PARSE_ERROR_SYNC_WORD       = -1,    DCA_PARSE_ERROR_DEFICIT_SAMPLES = -2,    DCA_PARSE_ERROR_PCM_BLOCKS      = -3,    DCA_PARSE_ERROR_FRAME_SIZE      = -4,    DCA_PARSE_ERROR_AMODE           = -5,    DCA_PARSE_ERROR_SAMPLE_RATE     = -6,    DCA_PARSE_ERROR_RESERVED_BIT    = -7,    DCA_PARSE_ERROR_LFE_FLAG        = -8,    DCA_PARSE_ERROR_PCM_RES         = -9,}; typedef struct DCACoreFrameHeader {    uint8_t     normal_frame;       ///< Frame type    uint8_t     deficit_samples;    ///< Deficit sample count    uint8_t     crc_present;        ///< CRC present flag    uint8_t     npcmblocks;         ///< Number of PCM sample blocks    uint16_t    frame_size;         ///< Primary frame byte size    uint8_t     audio_mode;         ///< Audio channel arrangement    uint8_t     sr_code;            ///< Core audio sampling frequency    uint8_t     br_code;            ///< Transmission bit rate    uint8_t     drc_present;        ///< Embedded dynamic range flag    uint8_t     ts_present;         ///< Embedded time stamp flag    uint8_t     aux_present;        ///< Auxiliary data flag    uint8_t     hdcd_master;        ///< HDCD mastering flag    uint8_t     ext_audio_type;     ///< Extension audio descriptor flag    uint8_t     ext_audio_present;  ///< Extended coding flag    uint8_t     sync_ssf;           ///< Audio sync word insertion flag    uint8_t     lfe_present;        ///< Low frequency effects flag    uint8_t     predictor_history;  ///< Predictor history flag switch    uint8_t     filter_perfect;     ///< Multirate interpolator switch    uint8_t     encoder_rev;        ///< Encoder software revision    uint8_t     copy_hist;          ///< Copy history    uint8_t     pcmr_code;          ///< Source PCM resolution    uint8_t     sumdiff_front;      ///< Front sum/difference flag    uint8_t     sumdiff_surround;   ///< Surround sum/difference flag    uint8_t     dn_code;            ///< Dialog normalization / unspecified} DCACoreFrameHeader; enum DCASpeaker {    DCA_SPEAKER_C,    DCA_SPEAKER_L,    DCA_SPEAKER_R,    DCA_SPEAKER_Ls,    DCA_SPEAKER_Rs,   DCA_SPEAKER_LFE1, DCA_SPEAKER_Cs,   DCA_SPEAKER_Lsr,    DCA_SPEAKER_Rsr,  DCA_SPEAKER_Lss,  DCA_SPEAKER_Rss,  DCA_SPEAKER_Lc,    DCA_SPEAKER_Rc,   DCA_SPEAKER_Lh,   DCA_SPEAKER_Ch,   DCA_SPEAKER_Rh,    DCA_SPEAKER_LFE2, DCA_SPEAKER_Lw,   DCA_SPEAKER_Rw,   DCA_SPEAKER_Oh,    DCA_SPEAKER_Lhs,  DCA_SPEAKER_Rhs,  DCA_SPEAKER_Chr,  DCA_SPEAKER_Lhr,    DCA_SPEAKER_Rhr,  DCA_SPEAKER_Cl,   DCA_SPEAKER_Ll,   DCA_SPEAKER_Rl,    DCA_SPEAKER_RSV1, DCA_SPEAKER_RSV2, DCA_SPEAKER_RSV3, DCA_SPEAKER_RSV4,     DCA_SPEAKER_COUNT}; enum DCASpeakerMask {    DCA_SPEAKER_MASK_C     = 0x00000001,    DCA_SPEAKER_MASK_L     = 0x00000002,    DCA_SPEAKER_MASK_R     = 0x00000004,    DCA_SPEAKER_MASK_Ls    = 0x00000008,    DCA_SPEAKER_MASK_Rs    = 0x00000010,    DCA_SPEAKER_MASK_LFE1  = 0x00000020,    DCA_SPEAKER_MASK_Cs    = 0x00000040,    DCA_SPEAKER_MASK_Lsr   = 0x00000080,    DCA_SPEAKER_MASK_Rsr   = 0x00000100,    DCA_SPEAKER_MASK_Lss   = 0x00000200,    DCA_SPEAKER_MASK_Rss   = 0x00000400,    DCA_SPEAKER_MASK_Lc    = 0x00000800,    DCA_SPEAKER_MASK_Rc    = 0x00001000,    DCA_SPEAKER_MASK_Lh    = 0x00002000,    DCA_SPEAKER_MASK_Ch    = 0x00004000,    DCA_SPEAKER_MASK_Rh    = 0x00008000,    DCA_SPEAKER_MASK_LFE2  = 0x00010000,    DCA_SPEAKER_MASK_Lw    = 0x00020000,    DCA_SPEAKER_MASK_Rw    = 0x00040000,    DCA_SPEAKER_MASK_Oh    = 0x00080000,    DCA_SPEAKER_MASK_Lhs   = 0x00100000,    DCA_SPEAKER_MASK_Rhs   = 0x00200000,    DCA_SPEAKER_MASK_Chr   = 0x00400000,    DCA_SPEAKER_MASK_Lhr   = 0x00800000,    DCA_SPEAKER_MASK_Rhr   = 0x01000000,    DCA_SPEAKER_MASK_Cl    = 0x02000000,    DCA_SPEAKER_MASK_Ll    = 0x04000000,    DCA_SPEAKER_MASK_Rl    = 0x08000000,}; #define DCA_SPEAKER_LAYOUT_MONO         (DCA_SPEAKER_MASK_C)#define DCA_SPEAKER_LAYOUT_STEREO       (DCA_SPEAKER_MASK_L | DCA_SPEAKER_MASK_R)#define DCA_SPEAKER_LAYOUT_2POINT1      (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_LFE1)#define DCA_SPEAKER_LAYOUT_3_0          (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_C)#define DCA_SPEAKER_LAYOUT_2_1          (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Cs)#define DCA_SPEAKER_LAYOUT_3_1          (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Cs)#define DCA_SPEAKER_LAYOUT_2_2          (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs)#define DCA_SPEAKER_LAYOUT_5POINT0      (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs)#define DCA_SPEAKER_LAYOUT_5POINT1      (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_LFE1)#define DCA_SPEAKER_LAYOUT_7POINT0_WIDE (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_Lw | DCA_SPEAKER_MASK_Rw)#define DCA_SPEAKER_LAYOUT_7POINT1_WIDE (DCA_SPEAKER_LAYOUT_7POINT0_WIDE | DCA_SPEAKER_MASK_LFE1) #define DCA_HAS_STEREO(mask) \    ((mask & DCA_SPEAKER_LAYOUT_STEREO) == DCA_SPEAKER_LAYOUT_STEREO) enum DCASpeakerPair {    DCA_SPEAKER_PAIR_C      = 0x0001,    DCA_SPEAKER_PAIR_LR     = 0x0002,    DCA_SPEAKER_PAIR_LsRs   = 0x0004,    DCA_SPEAKER_PAIR_LFE1   = 0x0008,    DCA_SPEAKER_PAIR_Cs     = 0x0010,    DCA_SPEAKER_PAIR_LhRh   = 0x0020,    DCA_SPEAKER_PAIR_LsrRsr = 0x0040,    DCA_SPEAKER_PAIR_Ch     = 0x0080,    DCA_SPEAKER_PAIR_Oh     = 0x0100,    DCA_SPEAKER_PAIR_LcRc   = 0x0200,    DCA_SPEAKER_PAIR_LwRw   = 0x0400,    DCA_SPEAKER_PAIR_LssRss = 0x0800,    DCA_SPEAKER_PAIR_LFE2   = 0x1000,    DCA_SPEAKER_PAIR_LhsRhs = 0x2000,    DCA_SPEAKER_PAIR_Chr    = 0x4000,    DCA_SPEAKER_PAIR_LhrRhr = 0x8000}; /** * Return number of individual channels in DCASpeakerPair mask */static inline int ff_dca_count_chs_for_mask(unsigned int mask){    return av_popcount((mask & 0xffff) | ((mask & 0xae66) << 16));} enum DCARepresentationType {    DCA_REPR_TYPE_LtRt = 2,    DCA_REPR_TYPE_LhRh = 3}; enum DCAExtensionMask {    DCA_CSS_CORE   = 0x001,    DCA_CSS_XXCH   = 0x002,    DCA_CSS_X96    = 0x004,    DCA_CSS_XCH    = 0x008,    DCA_CSS_MASK   = 0x00f,    DCA_EXSS_CORE  = 0x010,    DCA_EXSS_XBR   = 0x020,    DCA_EXSS_XXCH  = 0x040,    DCA_EXSS_X96   = 0x080,    DCA_EXSS_LBR   = 0x100,    DCA_EXSS_XLL   = 0x200,    DCA_EXSS_RSV1  = 0x400,    DCA_EXSS_RSV2  = 0x800,    DCA_EXSS_MASK  = 0xff0,}; enum DCADownMixType {    DCA_DMIX_TYPE_1_0,    DCA_DMIX_TYPE_LoRo,    DCA_DMIX_TYPE_LtRt,    DCA_DMIX_TYPE_3_0,    DCA_DMIX_TYPE_2_1,    DCA_DMIX_TYPE_2_2,    DCA_DMIX_TYPE_3_1,     DCA_DMIX_TYPE_COUNT}; extern const uint32_t ff_dca_sample_rates[16];extern const uint32_t ff_dca_sampling_freqs[16];extern const uint8_t ff_dca_freq_ranges[16];extern const uint8_t ff_dca_bits_per_sample[8];  /** * Convert bitstream to one representation based on sync marker */int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst,                                 int max_size); /** * Parse and validate core frame header * @param[out] h    Pointer to struct where header info is written. * @param[in]  buf  Pointer to the data buffer * @param[in]  size Size of the data buffer * @return 0 on success, negative AVERROR code on failure */int avpriv_dca_parse_core_frame_header(DCACoreFrameHeader *h, const uint8_t *buf, int size); /** * Parse and validate core frame header * @param[out] h   Pointer to struct where header info is written. * @param[in]  gbc BitContext containing the first 120 bits of the frame. * @return 0 on success, negative DCA_PARSE_ERROR_ code on failure */int ff_dca_parse_core_frame_header(DCACoreFrameHeader *h, GetBitContext *gb); #endif /* AVCODEC_DCA_H */