dca: Split code for handling the EXSS extension off into a separate file

1 files changed, 149 insertions, 0 deletions

diff --git a/libavcodec/dca.h b/libavcodec/dca.h
index 0037de2816..e2f57772bc 100644
--- a/libavcodec/dca.h
+++ b/libavcodec/dca.h
@@ -26,8 +26,15 @@
 #define AVCODEC_DCA_H
 
 #include <stdint.h>
+
+#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
@@ -37,6 +44,148 @@
 /** 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];
 
 /**