LCOV - code coverage report
Current view: top level - libavcodec - dca.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 2 2 100.0 %
Date: 2017-12-14 01:15:32 Functions: 1 1 100.0 %

          Line data    Source code
       1             : /*
       2             :  * DCA compatible decoder
       3             :  * Copyright (C) 2004 Gildas Bazin
       4             :  * Copyright (C) 2004 Benjamin Zores
       5             :  * Copyright (C) 2006 Benjamin Larsson
       6             :  * Copyright (C) 2007 Konstantin Shishkov
       7             :  * Copyright (C) 2016 foo86
       8             :  *
       9             :  * This file is part of FFmpeg.
      10             :  *
      11             :  * FFmpeg is free software; you can redistribute it and/or
      12             :  * modify it under the terms of the GNU Lesser General Public
      13             :  * License as published by the Free Software Foundation; either
      14             :  * version 2.1 of the License, or (at your option) any later version.
      15             :  *
      16             :  * FFmpeg is distributed in the hope that it will be useful,
      17             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      18             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      19             :  * Lesser General Public License for more details.
      20             :  *
      21             :  * You should have received a copy of the GNU Lesser General Public
      22             :  * License along with FFmpeg; if not, write to the Free Software
      23             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      24             :  */
      25             : 
      26             : #ifndef AVCODEC_DCA_H
      27             : #define AVCODEC_DCA_H
      28             : 
      29             : #include <stdint.h>
      30             : 
      31             : #include "libavutil/common.h"
      32             : #include "libavutil/intreadwrite.h"
      33             : 
      34             : #include "get_bits.h"
      35             : #include "internal.h"
      36             : 
      37             : #define DCA_CORE_FRAME_HEADER_SIZE      18
      38             : 
      39             : enum DCAParseError {
      40             :     DCA_PARSE_ERROR_SYNC_WORD       = -1,
      41             :     DCA_PARSE_ERROR_DEFICIT_SAMPLES = -2,
      42             :     DCA_PARSE_ERROR_PCM_BLOCKS      = -3,
      43             :     DCA_PARSE_ERROR_FRAME_SIZE      = -4,
      44             :     DCA_PARSE_ERROR_AMODE           = -5,
      45             :     DCA_PARSE_ERROR_SAMPLE_RATE     = -6,
      46             :     DCA_PARSE_ERROR_RESERVED_BIT    = -7,
      47             :     DCA_PARSE_ERROR_LFE_FLAG        = -8,
      48             :     DCA_PARSE_ERROR_PCM_RES         = -9,
      49             : };
      50             : 
      51             : typedef struct DCACoreFrameHeader {
      52             :     uint8_t     normal_frame;       ///< Frame type
      53             :     uint8_t     deficit_samples;    ///< Deficit sample count
      54             :     uint8_t     crc_present;        ///< CRC present flag
      55             :     uint8_t     npcmblocks;         ///< Number of PCM sample blocks
      56             :     uint16_t    frame_size;         ///< Primary frame byte size
      57             :     uint8_t     audio_mode;         ///< Audio channel arrangement
      58             :     uint8_t     sr_code;            ///< Core audio sampling frequency
      59             :     uint8_t     br_code;            ///< Transmission bit rate
      60             :     uint8_t     drc_present;        ///< Embedded dynamic range flag
      61             :     uint8_t     ts_present;         ///< Embedded time stamp flag
      62             :     uint8_t     aux_present;        ///< Auxiliary data flag
      63             :     uint8_t     hdcd_master;        ///< HDCD mastering flag
      64             :     uint8_t     ext_audio_type;     ///< Extension audio descriptor flag
      65             :     uint8_t     ext_audio_present;  ///< Extended coding flag
      66             :     uint8_t     sync_ssf;           ///< Audio sync word insertion flag
      67             :     uint8_t     lfe_present;        ///< Low frequency effects flag
      68             :     uint8_t     predictor_history;  ///< Predictor history flag switch
      69             :     uint8_t     filter_perfect;     ///< Multirate interpolator switch
      70             :     uint8_t     encoder_rev;        ///< Encoder software revision
      71             :     uint8_t     copy_hist;          ///< Copy history
      72             :     uint8_t     pcmr_code;          ///< Source PCM resolution
      73             :     uint8_t     sumdiff_front;      ///< Front sum/difference flag
      74             :     uint8_t     sumdiff_surround;   ///< Surround sum/difference flag
      75             :     uint8_t     dn_code;            ///< Dialog normalization / unspecified
      76             : } DCACoreFrameHeader;
      77             : 
      78             : enum DCASpeaker {
      79             :     DCA_SPEAKER_C,    DCA_SPEAKER_L,    DCA_SPEAKER_R,    DCA_SPEAKER_Ls,
      80             :     DCA_SPEAKER_Rs,   DCA_SPEAKER_LFE1, DCA_SPEAKER_Cs,   DCA_SPEAKER_Lsr,
      81             :     DCA_SPEAKER_Rsr,  DCA_SPEAKER_Lss,  DCA_SPEAKER_Rss,  DCA_SPEAKER_Lc,
      82             :     DCA_SPEAKER_Rc,   DCA_SPEAKER_Lh,   DCA_SPEAKER_Ch,   DCA_SPEAKER_Rh,
      83             :     DCA_SPEAKER_LFE2, DCA_SPEAKER_Lw,   DCA_SPEAKER_Rw,   DCA_SPEAKER_Oh,
      84             :     DCA_SPEAKER_Lhs,  DCA_SPEAKER_Rhs,  DCA_SPEAKER_Chr,  DCA_SPEAKER_Lhr,
      85             :     DCA_SPEAKER_Rhr,  DCA_SPEAKER_Cl,   DCA_SPEAKER_Ll,   DCA_SPEAKER_Rl,
      86             :     DCA_SPEAKER_RSV1, DCA_SPEAKER_RSV2, DCA_SPEAKER_RSV3, DCA_SPEAKER_RSV4,
      87             : 
      88             :     DCA_SPEAKER_COUNT
      89             : };
      90             : 
      91             : enum DCASpeakerMask {
      92             :     DCA_SPEAKER_MASK_C     = 0x00000001,
      93             :     DCA_SPEAKER_MASK_L     = 0x00000002,
      94             :     DCA_SPEAKER_MASK_R     = 0x00000004,
      95             :     DCA_SPEAKER_MASK_Ls    = 0x00000008,
      96             :     DCA_SPEAKER_MASK_Rs    = 0x00000010,
      97             :     DCA_SPEAKER_MASK_LFE1  = 0x00000020,
      98             :     DCA_SPEAKER_MASK_Cs    = 0x00000040,
      99             :     DCA_SPEAKER_MASK_Lsr   = 0x00000080,
     100             :     DCA_SPEAKER_MASK_Rsr   = 0x00000100,
     101             :     DCA_SPEAKER_MASK_Lss   = 0x00000200,
     102             :     DCA_SPEAKER_MASK_Rss   = 0x00000400,
     103             :     DCA_SPEAKER_MASK_Lc    = 0x00000800,
     104             :     DCA_SPEAKER_MASK_Rc    = 0x00001000,
     105             :     DCA_SPEAKER_MASK_Lh    = 0x00002000,
     106             :     DCA_SPEAKER_MASK_Ch    = 0x00004000,
     107             :     DCA_SPEAKER_MASK_Rh    = 0x00008000,
     108             :     DCA_SPEAKER_MASK_LFE2  = 0x00010000,
     109             :     DCA_SPEAKER_MASK_Lw    = 0x00020000,
     110             :     DCA_SPEAKER_MASK_Rw    = 0x00040000,
     111             :     DCA_SPEAKER_MASK_Oh    = 0x00080000,
     112             :     DCA_SPEAKER_MASK_Lhs   = 0x00100000,
     113             :     DCA_SPEAKER_MASK_Rhs   = 0x00200000,
     114             :     DCA_SPEAKER_MASK_Chr   = 0x00400000,
     115             :     DCA_SPEAKER_MASK_Lhr   = 0x00800000,
     116             :     DCA_SPEAKER_MASK_Rhr   = 0x01000000,
     117             :     DCA_SPEAKER_MASK_Cl    = 0x02000000,
     118             :     DCA_SPEAKER_MASK_Ll    = 0x04000000,
     119             :     DCA_SPEAKER_MASK_Rl    = 0x08000000,
     120             : };
     121             : 
     122             : #define DCA_SPEAKER_LAYOUT_MONO         (DCA_SPEAKER_MASK_C)
     123             : #define DCA_SPEAKER_LAYOUT_STEREO       (DCA_SPEAKER_MASK_L | DCA_SPEAKER_MASK_R)
     124             : #define DCA_SPEAKER_LAYOUT_2POINT1      (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_LFE1)
     125             : #define DCA_SPEAKER_LAYOUT_3_0          (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_C)
     126             : #define DCA_SPEAKER_LAYOUT_2_1          (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Cs)
     127             : #define DCA_SPEAKER_LAYOUT_3_1          (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Cs)
     128             : #define DCA_SPEAKER_LAYOUT_2_2          (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs)
     129             : #define DCA_SPEAKER_LAYOUT_5POINT0      (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs)
     130             : #define DCA_SPEAKER_LAYOUT_5POINT1      (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_LFE1)
     131             : #define DCA_SPEAKER_LAYOUT_7POINT0_WIDE (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_Lw | DCA_SPEAKER_MASK_Rw)
     132             : #define DCA_SPEAKER_LAYOUT_7POINT1_WIDE (DCA_SPEAKER_LAYOUT_7POINT0_WIDE | DCA_SPEAKER_MASK_LFE1)
     133             : 
     134             : #define DCA_HAS_STEREO(mask) \
     135             :     ((mask & DCA_SPEAKER_LAYOUT_STEREO) == DCA_SPEAKER_LAYOUT_STEREO)
     136             : 
     137             : enum DCASpeakerPair {
     138             :     DCA_SPEAKER_PAIR_C      = 0x0001,
     139             :     DCA_SPEAKER_PAIR_LR     = 0x0002,
     140             :     DCA_SPEAKER_PAIR_LsRs   = 0x0004,
     141             :     DCA_SPEAKER_PAIR_LFE1   = 0x0008,
     142             :     DCA_SPEAKER_PAIR_Cs     = 0x0010,
     143             :     DCA_SPEAKER_PAIR_LhRh   = 0x0020,
     144             :     DCA_SPEAKER_PAIR_LsrRsr = 0x0040,
     145             :     DCA_SPEAKER_PAIR_Ch     = 0x0080,
     146             :     DCA_SPEAKER_PAIR_Oh     = 0x0100,
     147             :     DCA_SPEAKER_PAIR_LcRc   = 0x0200,
     148             :     DCA_SPEAKER_PAIR_LwRw   = 0x0400,
     149             :     DCA_SPEAKER_PAIR_LssRss = 0x0800,
     150             :     DCA_SPEAKER_PAIR_LFE2   = 0x1000,
     151             :     DCA_SPEAKER_PAIR_LhsRhs = 0x2000,
     152             :     DCA_SPEAKER_PAIR_Chr    = 0x4000,
     153             :     DCA_SPEAKER_PAIR_LhrRhr = 0x8000
     154             : };
     155             : 
     156             : /**
     157             :  * Return number of individual channels in DCASpeakerPair mask
     158             :  */
     159        7085 : static inline int ff_dca_count_chs_for_mask(unsigned int mask)
     160             : {
     161        7085 :     return av_popcount((mask & 0xffff) | ((mask & 0xae66) << 16));
     162             : }
     163             : 
     164             : enum DCARepresentationType {
     165             :     DCA_REPR_TYPE_LtRt = 2,
     166             :     DCA_REPR_TYPE_LhRh = 3
     167             : };
     168             : 
     169             : enum DCAExtensionMask {
     170             :     DCA_CSS_CORE   = 0x001,
     171             :     DCA_CSS_XXCH   = 0x002,
     172             :     DCA_CSS_X96    = 0x004,
     173             :     DCA_CSS_XCH    = 0x008,
     174             :     DCA_CSS_MASK   = 0x00f,
     175             :     DCA_EXSS_CORE  = 0x010,
     176             :     DCA_EXSS_XBR   = 0x020,
     177             :     DCA_EXSS_XXCH  = 0x040,
     178             :     DCA_EXSS_X96   = 0x080,
     179             :     DCA_EXSS_LBR   = 0x100,
     180             :     DCA_EXSS_XLL   = 0x200,
     181             :     DCA_EXSS_RSV1  = 0x400,
     182             :     DCA_EXSS_RSV2  = 0x800,
     183             :     DCA_EXSS_MASK  = 0xff0,
     184             : };
     185             : 
     186             : enum DCADownMixType {
     187             :     DCA_DMIX_TYPE_1_0,
     188             :     DCA_DMIX_TYPE_LoRo,
     189             :     DCA_DMIX_TYPE_LtRt,
     190             :     DCA_DMIX_TYPE_3_0,
     191             :     DCA_DMIX_TYPE_2_1,
     192             :     DCA_DMIX_TYPE_2_2,
     193             :     DCA_DMIX_TYPE_3_1,
     194             : 
     195             :     DCA_DMIX_TYPE_COUNT
     196             : };
     197             : 
     198             : extern av_export_avcodec const uint32_t avpriv_dca_sample_rates[16];
     199             : 
     200             : extern const uint32_t ff_dca_sampling_freqs[16];
     201             : extern const uint8_t ff_dca_freq_ranges[16];
     202             : extern const uint8_t ff_dca_bits_per_sample[8];
     203             : 
     204             : 
     205             : /**
     206             :  * Convert bitstream to one representation based on sync marker
     207             :  */
     208             : int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst,
     209             :                                  int max_size);
     210             : 
     211             : /**
     212             :  * Parse and validate core frame header
     213             :  * @param[out] h    Pointer to struct where header info is written.
     214             :  * @param[in]  buf  Pointer to the data buffer
     215             :  * @param[in]  size Size of the data buffer
     216             :  * @return 0 on success, negative AVERROR code on failure
     217             :  */
     218             : int avpriv_dca_parse_core_frame_header(DCACoreFrameHeader *h, const uint8_t *buf, int size);
     219             : 
     220             : /**
     221             :  * Parse and validate core frame header
     222             :  * @param[out] h   Pointer to struct where header info is written.
     223             :  * @param[in]  gbc BitContext containing the first 120 bits of the frame.
     224             :  * @return 0 on success, negative DCA_PARSE_ERROR_ code on failure
     225             :  */
     226             : int ff_dca_parse_core_frame_header(DCACoreFrameHeader *h, GetBitContext *gb);
     227             : 
     228             : #endif /* AVCODEC_DCA_H */

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