/* * DCA compatible decoder * Copyright (C) 2004 Gildas Bazin * Copyright (C) 2004 Benjamin Zores * Copyright (C) 2006 Benjamin Larsson * Copyright (C) 2007 Konstantin Shishkov * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; 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 #include "libavutil/float_dsp.h" #include "libavutil/internal.h" #include "avcodec.h" #include "dcadsp.h" #include "fmtconvert.h" #include "get_bits.h" /** DCA syncwords, also used for bitstream type detection */ #define DCA_MARKER_RAW_BE 0x7FFE8001 #define DCA_MARKER_RAW_LE 0xFE7F0180 #define DCA_MARKER_14B_BE 0x1FFFE800 #define DCA_MARKER_14B_LE 0xFF1F00E8 /** DCA-HD specific block starts with this marker. */ #define DCA_HD_MARKER 0x64582025 #define DCA_PRIM_CHANNELS_MAX (7) #define DCA_ABITS_MAX (32) /* Should be 28 */ #define DCA_SUBSUBFRAMES_MAX (4) #define DCA_SUBFRAMES_MAX (16) #define DCA_BLOCKS_MAX (16) #define DCA_LFE_MAX (3) #define DCA_MAX_FRAME_SIZE 16384 #define DCA_MAX_EXSS_HEADER_SIZE 4096 #define DCA_BUFFER_PADDING_SIZE 1024 enum DCAExtensionMask { DCA_EXT_CORE = 0x001, ///< core in core substream DCA_EXT_XXCH = 0x002, ///< XXCh channels extension in core substream DCA_EXT_X96 = 0x004, ///< 96/24 extension in core substream DCA_EXT_XCH = 0x008, ///< XCh channel extension in core substream DCA_EXT_EXSS_CORE = 0x010, ///< core in ExSS (extension substream) DCA_EXT_EXSS_XBR = 0x020, ///< extended bitrate extension in ExSS DCA_EXT_EXSS_XXCH = 0x040, ///< XXCh channels extension in ExSS DCA_EXT_EXSS_X96 = 0x080, ///< 96/24 extension in ExSS DCA_EXT_EXSS_LBR = 0x100, ///< low bitrate component in ExSS DCA_EXT_EXSS_XLL = 0x200, ///< lossless extension in ExSS }; typedef struct DCAContext { AVClass *class; ///< class for AVOptions AVCodecContext *avctx; /* Frame header */ int frame_type; ///< type of the current frame int samples_deficit; ///< deficit sample count int crc_present; ///< crc is present in the bitstream int sample_blocks; ///< number of PCM sample blocks int frame_size; ///< primary frame byte size int amode; ///< audio channels arrangement int sample_rate; ///< audio sampling rate int bit_rate; ///< transmission bit rate int bit_rate_index; ///< transmission bit rate index int dynrange; ///< embedded dynamic range flag int timestamp; ///< embedded time stamp flag int aux_data; ///< auxiliary data flag int hdcd; ///< source material is mastered in HDCD int ext_descr; ///< extension audio descriptor flag int ext_coding; ///< extended coding flag int aspf; ///< audio sync word insertion flag int lfe; ///< low frequency effects flag int predictor_history; ///< predictor history flag int header_crc; ///< header crc check bytes int multirate_inter; ///< multirate interpolator switch int version; ///< encoder software revision int copy_history; ///< copy history int source_pcm_res; ///< source pcm resolution int front_sum; ///< front sum/difference flag int surround_sum; ///< surround sum/difference flag int dialog_norm; ///< dialog normalisation parameter /* Primary audio coding header */ int subframes; ///< number of subframes int total_channels; ///< number of channels including extensions int prim_channels; ///< number of primary audio channels int subband_activity[DCA_PRIM_CHANNELS_MAX]; ///< subband activity count int vq_start_subband[DCA_PRIM_CHANNELS_MAX]; ///< high frequency vq start subband int joint_intensity[DCA_PRIM_CHANNELS_MAX]; ///< joint intensity coding index int transient_huffman[DCA_PRIM_CHANNELS_MAX]; ///< transient mode code book int scalefactor_huffman[DCA_PRIM_CHANNELS_MAX]; ///< scale factor code book int bitalloc_huffman[DCA_PRIM_CHANNELS_MAX]; ///< bit allocation quantizer select int quant_index_huffman[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]; ///< quantization index codebook select float scalefactor_adj[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]; ///< scale factor adjustment /* Primary audio coding side information */ int subsubframes[DCA_SUBFRAMES_MAX]; ///< number of subsubframes int partial_samples[DCA_SUBFRAMES_MAX]; ///< partial subsubframe samples count int prediction_mode[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< prediction mode (ADPCM used or not) int prediction_vq[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< prediction VQ coefs int bitalloc[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< bit allocation index int transition_mode[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< transition mode (transients) int32_t scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][2];///< scale factors (2 if transient) int joint_huff[DCA_PRIM_CHANNELS_MAX]; ///< joint subband scale factors codebook int joint_scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< joint subband scale factors float downmix_coef[DCA_PRIM_CHANNELS_MAX + 1][2]; ///< stereo downmix coefficients int dynrange_coef; ///< dynamic range coefficient /* Core substream's embedded downmix coefficients (cf. ETSI TS 102 114 V1.4.1) * Input: primary audio channels (incl. LFE if present) * Output: downmix audio channels (up to 4, no LFE) */ uint8_t core_downmix; ///< embedded downmix coefficients available uint8_t core_downmix_amode; ///< audio channel arrangement of embedded downmix uint16_t core_downmix_codes[DCA_PRIM_CHANNELS_MAX + 1][4]; ///< embedded downmix coefficients (9-bit codes) int32_t high_freq_vq[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< VQ encoded high frequency subbands float lfe_data[2 * DCA_LFE_MAX * (DCA_BLOCKS_MAX + 4)]; ///< Low frequency effect data int lfe_scale_factor; /* Subband samples history (for ADPCM) */ DECLARE_ALIGNED(16, float, subband_samples_hist)[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][4]; DECLARE_ALIGNED(32, float, subband_fir_hist)[DCA_PRIM_CHANNELS_MAX][512]; DECLARE_ALIGNED(32, float, subband_fir_noidea)[DCA_PRIM_CHANNELS_MAX][32]; int hist_index[DCA_PRIM_CHANNELS_MAX]; DECLARE_ALIGNED(32, float, raXin)[32]; int output; ///< type of output DECLARE_ALIGNED(32, float, subband_samples)[DCA_BLOCKS_MAX][DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][8]; float *samples_chanptr[DCA_PRIM_CHANNELS_MAX + 1]; float *extra_channels[DCA_PRIM_CHANNELS_MAX + 1]; uint8_t *extra_channels_buffer; unsigned int extra_channels_buffer_size; uint8_t dca_buffer[DCA_MAX_FRAME_SIZE + DCA_MAX_EXSS_HEADER_SIZE + DCA_BUFFER_PADDING_SIZE]; int dca_buffer_size; ///< how much data is in the dca_buffer const int8_t *channel_order_tab; ///< channel reordering table, lfe and non lfe GetBitContext gb; /* Current position in DCA frame */ int current_subframe; int current_subsubframe; int core_ext_mask; ///< present extensions in the core substream /* XCh extension information */ int xch_present; ///< XCh extension present and valid int xch_base_channel; ///< index of first (only) channel containing XCH data int xch_disable; ///< whether the XCh extension should be decoded or not /* ExSS header parser */ int static_fields; ///< static fields present int mix_metadata; ///< mixing metadata present int num_mix_configs; ///< number of mix out configurations int mix_config_num_ch[4]; ///< number of channels in each mix out configuration int profile; int debug_flag; ///< used for suppressing repeated error messages output AVFloatDSPContext fdsp; FFTContext imdct; SynthFilterContext synth; DCADSPContext dcadsp; FmtConvertContext fmt_conv; } DCAContext; extern av_export const uint32_t avpriv_dca_sample_rates[16]; /** * Convert bitstream to one representation based on sync marker */ int ff_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst, int max_size); #endif /* AVCODEC_DCA_H */