#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_PRIM_CHANNELS_MAX (7)
#define DCA_ABITS_MAX (32) /* Should be 28 */
#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
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;
+
typedef struct DCAContext {
AVClass *class; ///< class for AVOptions
AVCodecContext *avctx;
/* 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];
+ /* 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)[DCA_PRIM_CHANNELS_MAX][1024];
+ DECLARE_ALIGNED(32, float, subband_fir_noidea)[DCA_PRIM_CHANNELS_MAX][64];
int hist_index[DCA_PRIM_CHANNELS_MAX];
DECLARE_ALIGNED(32, float, raXin)[32];
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 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;
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