#define AVCODEC_DCA_H
#include <stdint.h>
+
+#include "libavutil/float_dsp.h"
#include "libavutil/internal.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
+#include "avcodec.h"
+#include "dcadsp.h"
+#include "fmtconvert.h"
+#include "get_bits.h"
+
+#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_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_XLL_FBANDS_MAX (4)
+#define DCA_XLL_SEGMENTS_MAX (16)
+#define DCA_XLL_CHSETS_MAX (16)
+#define DCA_XLL_CHANNELS_MAX (16)
+#define DCA_XLL_AORDER_MAX (15)
+
+/* Arbitrary limit; not sure what the maximum really is, but much larger. */
+#define DCA_XLL_DMIX_NCOEFFS_MAX (18)
+
+#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 XllChSetSubHeader {
+ int channels; ///< number of channels in channel set, at most 16
+ int residual_encode; ///< residual channel encoding
+ int bit_resolution; ///< input sample bit-width
+ int bit_width; ///< original input sample bit-width
+ int sampling_frequency; ///< sampling frequency
+ int samp_freq_interp; ///< sampling frequency interpolation multiplier
+ int replacement_set; ///< replacement channel set group
+ int active_replace_set; ///< current channel set is active channel set
+ int primary_ch_set;
+ int downmix_coeff_code_embedded;
+ int downmix_embedded;
+ int downmix_type;
+ int hier_chset; ///< hierarchical channel set
+ int downmix_ncoeffs;
+ int downmix_coeffs[DCA_XLL_DMIX_NCOEFFS_MAX];
+ int ch_mask_enabled;
+ int ch_mask;
+ int mapping_coeffs_present;
+ int num_freq_bands;
+
+ /* m_nOrigChanOrder */
+ uint8_t orig_chan_order[DCA_XLL_FBANDS_MAX][DCA_XLL_CHANNELS_MAX];
+ uint8_t orig_chan_order_inv[DCA_XLL_FBANDS_MAX][DCA_XLL_CHANNELS_MAX];
+ /* Coefficients for channel pairs (at most 8), m_anPWChPairsCoeffs */
+ int8_t pw_ch_pairs_coeffs[DCA_XLL_FBANDS_MAX][DCA_XLL_CHANNELS_MAX/2];
+ /* m_nCurrHighestLPCOrder */
+ uint8_t adapt_order_max[DCA_XLL_FBANDS_MAX];
+ /* m_pnAdaptPredOrder */
+ uint8_t adapt_order[DCA_XLL_FBANDS_MAX][DCA_XLL_CHANNELS_MAX];
+ /* m_pnFixedPredOrder */
+ uint8_t fixed_order[DCA_XLL_FBANDS_MAX][DCA_XLL_CHANNELS_MAX];
+ /* m_pnLPCReflCoeffsQInd, unsigned version */
+ uint8_t lpc_refl_coeffs_q_ind[DCA_XLL_FBANDS_MAX]
+ [DCA_XLL_CHANNELS_MAX][DCA_XLL_AORDER_MAX];
+
+ int lsb_fsize[DCA_XLL_FBANDS_MAX];
+ int8_t scalable_lsbs[DCA_XLL_FBANDS_MAX][DCA_XLL_CHANNELS_MAX];
+ int8_t bit_width_adj_per_ch[DCA_XLL_FBANDS_MAX][DCA_XLL_CHANNELS_MAX];
+} XllChSetSubHeader;
+
+typedef struct XllNavi {
+ GetBitContext gb; // Context for parsing the data segments
+ unsigned band_size[DCA_XLL_FBANDS_MAX];
+ unsigned segment_size[DCA_XLL_FBANDS_MAX][DCA_XLL_SEGMENTS_MAX];
+ unsigned chset_size[DCA_XLL_FBANDS_MAX][DCA_XLL_SEGMENTS_MAX][DCA_XLL_CHSETS_MAX];
+} XllNavi;
+
+typedef struct QMF64_table {
+ float dct4_coeff[32][32];
+ float dct2_coeff[32][32];
+ float rcos[32];
+ float rsin[32];
+} QMF64_table;
+
+/* Primary audio coding header */
+typedef struct DCAAudioHeader {
+ 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
+ uint32_t scalefactor_adj[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]; ///< scale factor adjustment
+
+ int subframes; ///< number of subframes
+ int total_channels; ///< number of channels including extensions
+ int prim_channels; ///< number of primary audio channels
+} DCAAudioHeader;
+
+typedef struct DCAChan {
+ DECLARE_ALIGNED(32, int32_t, subband_samples)[DCA_BLOCKS_MAX][DCA_SUBBANDS][SAMPLES_PER_SUBBAND];
+
+ /* Subband samples history (for ADPCM) */
+ DECLARE_ALIGNED(32, int32_t, subband_samples_hist)[DCA_SUBBANDS][4];
+ int hist_index;
+
+ /* Half size is sufficient for core decoding, but for 96 kHz data
+ * we need QMF with 64 subbands and 1024 samples. */
+ DECLARE_ALIGNED(32, float, subband_fir_hist)[1024];
+ DECLARE_ALIGNED(32, float, subband_fir_noidea)[64];
+
+ /* Primary audio coding side information */
+ int prediction_mode[DCA_SUBBANDS]; ///< prediction mode (ADPCM used or not)
+ int prediction_vq[DCA_SUBBANDS]; ///< prediction VQ coefs
+ int bitalloc[DCA_SUBBANDS]; ///< bit allocation index
+ int transition_mode[DCA_SUBBANDS]; ///< transition mode (transients)
+ int32_t scale_factor[DCA_SUBBANDS][2];///< scale factors (2 if transient)
+ int joint_huff; ///< joint subband scale factors codebook
+ int joint_scale_factor[DCA_SUBBANDS]; ///< joint subband scale factors
+
+ int32_t high_freq_vq[DCA_SUBBANDS]; ///< VQ encoded high frequency subbands
+} DCAChan;
+
-/** DCA-HD specific block starts with this marker. */
-#define DCA_HD_MARKER 0x64582025
+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 */
+ DCAAudioHeader audio_header;
+
+ /* Primary audio coding side information */
+ int subsubframes[DCA_SUBFRAMES_MAX]; ///< number of subsubframes
+ int partial_samples[DCA_SUBFRAMES_MAX]; ///< partial subsubframe samples count
+ 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)
+
+
+ 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(32, float, raXin)[32];
+
+ DCAChan dca_chan[DCA_PRIM_CHANNELS_MAX];
+
+ int output; ///< type of output
+
+ 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
+ int exss_ext_mask; ///< Non-core extensions
+
+ /* 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
+
+ /* XLL extension information */
+ int xll_disable;
+ int xll_nch_sets; ///< number of channel sets per frame
+ int xll_channels; ///< total number of channels (in all channel sets)
+ int xll_residual_channels; ///< number of residual channels
+ int xll_segments; ///< number of segments per frame
+ int xll_log_smpl_in_seg; ///< supposedly this is "nBits4SamplLoci"
+ int xll_smpl_in_seg; ///< samples in segment per one frequency band for the first channel set
+ int xll_bits4seg_size; ///< number of bits used to read segment size
+ int xll_banddata_crc; ///< presence of CRC16 within each frequency band
+ int xll_scalable_lsb;
+ int xll_bits4ch_mask; ///< channel position mask
+ int xll_fixed_lsb_width;
+ XllChSetSubHeader xll_chsets[DCA_XLL_CHSETS_MAX];
+ XllNavi xll_navi;
+ int *xll_sample_buf;
+ unsigned int xll_sample_buf_size;
+
+ /* 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 one2one_map_chtospkr;
+
+ int debug_flag; ///< used for suppressing repeated error messages output
+ AVFloatDSPContext fdsp;
+ FFTContext imdct;
+ SynthFilterContext synth;
+ DCADSPContext dcadsp;
+ QMF64_table *qmf64_table;
+ FmtConvertContext fmt_conv;
+} DCAContext;
extern av_export const uint32_t avpriv_dca_sample_rates[16];
int ff_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst,
int max_size);
+void ff_dca_exss_parse_header(DCAContext *s);
+
+int ff_dca_xll_decode_header(DCAContext *s);
+int ff_dca_xll_decode_navi(DCAContext *s, int asset_end);
+int ff_dca_xll_decode_audio(DCAContext *s, AVFrame *frame);
+
#endif /* AVCODEC_DCA_H */
projects / ffmpeg / blobdiff