| /* |
| * 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" |
| #include "internal.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 av_export_avcodec const uint32_t avpriv_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 */ |
