Merge commit '217e4ff4'

* commit '217e4ff4':
  dca: Support for XLL (lossless extension)

Conflicts:
	Changelog
	doc/general.texi
	libavcodec/Makefile
	libavcodec/dca.h
	libavcodec/dca_exss.c
	libavcodec/dcadata.h
	libavcodec/dcadec.c
	libavcodec/version.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Changelog

@@ -4,6 +4,7 @@ releases are sorted from youngest to oldest.
 version <next>:
 - FFT video filter
 - TDSC decoder
+- DTS lossless extension (XLL) decoding (not lossless, disabled by default)
 
 
 version 2.6:

doc/general.texi

@@ -906,6 +906,7 @@ following image formats are supported:
 @item COOK                   @tab     @tab  X
     @tab All versions except 5.1 are supported.
 @item DCA (DTS Coherent Acoustics)  @tab  X  @tab  X
+    @tab supported extensions: XCh, XLL (partially)
 @item DPCM id RoQ            @tab  X  @tab  X
     @tab Used in Quake III, Jedi Knight 2 and other computer games.
 @item DPCM Interplay         @tab     @tab  X

libavcodec/Makefile

@@ -193,7 +193,7 @@ OBJS-$(CONFIG_CSCD_DECODER)            += cscd.o
 OBJS-$(CONFIG_CYUV_DECODER)            += cyuv.o
 OBJS-$(CONFIG_DCA_DECODER)             += dcadec.o dca.o dcadsp.o      \
                                           dcadata.o dca_exss.o         \
-                                          synth_filter.o
+                                          dca_xll.o synth_filter.o
 OBJS-$(CONFIG_DCA_ENCODER)             += dcaenc.o dca.o dcadata.o
 OBJS-$(CONFIG_DIRAC_DECODER)           += diracdec.o dirac.o diracdsp.o \
                                           dirac_arith.o mpeg12data.o dirac_dwt.o

libavcodec/dca.h

@@ -44,6 +44,21 @@
 #define DCA_CHSETS_MAX         (4)
 #define DCA_CHSET_CHANS_MAX    (8)
 
+#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
 
@@ -62,6 +77,61 @@ enum DCAExtensionMask {
     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 {
     const AVClass *class;       ///< class for AVOptions
     AVCodecContext *avctx;
@@ -134,8 +204,10 @@ typedef struct DCAContext {
 
     /* 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];
 
@@ -157,6 +229,7 @@ typedef struct DCAContext {
     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
@@ -177,6 +250,24 @@ typedef struct DCAContext {
     int8_t xxch_order_tab[32];
     int8_t lfe_index;
 
+    /* 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
@@ -184,12 +275,14 @@ typedef struct DCAContext {
     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;
 
@@ -206,4 +299,8 @@ int ff_dca_xxch_decode_frame(DCAContext *s);
 
 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 */

libavcodec/dca_exss.c

@@ -22,6 +22,7 @@
 #include "libavutil/log.h"
 
 #include "dca.h"
+#include "dca_syncwords.h"
 #include "get_bits.h"
 
 /* extensions that reside in core substream */
@@ -121,7 +122,8 @@ static int dca_exss_parse_asset_header(DCAContext *s)
         skip_bits(&s->gb, 4); // max sample rate code
         channels = get_bits(&s->gb, 8) + 1;
 
-        if (get_bits1(&s->gb)) { // 1-to-1 channels to speakers
+        s->one2one_map_chtospkr = get_bits1(&s->gb);
+        if (s->one2one_map_chtospkr) {
             int spkr_remap_sets;
             int spkr_mask_size = 16;
             int num_spkrs[7];
@@ -249,14 +251,14 @@ void ff_dca_exss_parse_header(DCAContext *s)
     int num_assets = 1;
     int active_ss_mask[8];
     int i, j;
-    int start_posn;
+    int start_pos;
     int hdrsize;
     uint32_t mkr;
 
     if (get_bits_left(&s->gb) < 52)
         return;
 
-    start_posn = get_bits_count(&s->gb) - 32;
+    start_pos = get_bits_count(&s->gb) - 32;
 
     skip_bits(&s->gb, 8); // user data
     ss_index = get_bits(&s->gb, 2);
@@ -317,38 +319,55 @@ void ff_dca_exss_parse_header(DCAContext *s)
     av_assert0(num_assets > 0); // silence a warning
 
     for (i = 0; i < num_assets; i++)
-        asset_size[i] = get_bits_long(&s->gb, 16 + 4 * blownup);
+        asset_size[i] = get_bits_long(&s->gb, 16 + 4 * blownup) + 1;
 
     for (i = 0; i < num_assets; i++) {
         if (dca_exss_parse_asset_header(s))
             return;
     }
 
-    /* not parsed further, we were only interested in the extensions mask
-     * from the asset header */
-
         j = get_bits_count(&s->gb);
-        if (start_posn + hdrsize * 8 > j)
-            skip_bits_long(&s->gb, start_posn + hdrsize * 8 - j);
+        if (start_pos + hdrsize * 8 > j)
+            skip_bits_long(&s->gb, start_pos + hdrsize * 8 - j);
 
         for (i = 0; i < num_assets; i++) {
-            start_posn = get_bits_count(&s->gb);
+            int end_pos;
+            start_pos = get_bits_count(&s->gb);
+            end_pos   = start_pos + asset_size[i] * 8;
             mkr       = get_bits_long(&s->gb, 32);
 
             /* parse extensions that we know about */
-            if (mkr == 0x655e315e) {
+            switch (mkr) {
+            case DCA_SYNCWORD_XBR:
                 ff_dca_xbr_parse_frame(s);
-            } else if (mkr == 0x47004a03) {
+                break;
+            case DCA_SYNCWORD_XXCH:
                 ff_dca_xxch_decode_frame(s);
                 s->core_ext_mask |= DCA_EXT_XXCH; /* xxx use for chan reordering */
-            } else {
+                break;
+            case DCA_SYNCWORD_XLL:
+                if (s->xll_disable) {
+                    av_log(s->avctx, AV_LOG_DEBUG,
+                           "DTS-XLL: ignoring XLL extension\n");
+                    break;
+                }
+                av_log(s->avctx, AV_LOG_DEBUG,
+                       "DTS-XLL: decoding XLL extension\n");
+                if (ff_dca_xll_decode_header(s)        == 0 &&
+                    ff_dca_xll_decode_navi(s, end_pos) == 0)
+                    s->exss_ext_mask |= DCA_EXT_EXSS_XLL;
+                break;
+            default:
                 av_log(s->avctx, AV_LOG_DEBUG,
                        "DTS-ExSS: unknown marker = 0x%08x\n", mkr);
             }
 
             /* skip to end of block */
             j = get_bits_count(&s->gb);
-            if (start_posn + asset_size[i] * 8 > j)
-                skip_bits_long(&s->gb, start_posn + asset_size[i] * 8 - j);
+            if (j > end_pos)
+                av_log(s->avctx, AV_LOG_ERROR,
+                       "DTS-ExSS: Processed asset too long.\n");
+            if (j < end_pos)
+                skip_bits_long(&s->gb, end_pos - j);
         }
 }

libavcodec/dcadata.h

@@ -47,8 +47,14 @@ extern const float ff_dca_fir_32bands_nonperfect[512];
 
 extern const float ff_dca_lfe_fir_64[256];
 extern const float ff_dca_lfe_fir_128[256];
+extern const float ff_dca_lfe_xll_fir_64[256];
+extern const float ff_dca_fir_64bands[1024];
 
-extern const uint16_t ff_dca_dmixtable[242];
+#define FF_DCA_DMIXTABLE_SIZE      242
+#define FF_DCA_INV_DMIXTABLE_SIZE  201
+
+extern const uint16_t ff_dca_dmixtable[FF_DCA_DMIXTABLE_SIZE];
+extern const uint32_t ff_dca_inv_dmixtable[FF_DCA_INV_DMIXTABLE_SIZE];
 
 extern const float ff_dca_default_coeffs[10][6][2];
 
@@ -57,6 +63,8 @@ extern const int ff_dca_ext_audio_descr_mask[8];
 
 extern const uint64_t ff_dca_core_channel_layout[16];
 
+extern const int32_t ff_dca_sampling_freqs[16];
+
 extern const int8_t ff_dca_lfe_index[16];
 
 extern const int8_t ff_dca_channel_reorder_lfe[16][9];

libavcodec/version.h

@@ -29,7 +29,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 56
-#define LIBAVCODEC_VERSION_MINOR  27
+#define LIBAVCODEC_VERSION_MINOR  28
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \