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

tags/n2.6
Diego Biurrun 11 years ago
parent
bf704132a5
commit
b339019de4
5 changed files with 502 additions and 440 deletions
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  1. +1
    -1
      libavcodec/Makefile
  2. +149
    -0
      libavcodec/dca.h
  3. +322
    -0
      libavcodec/dca_exss.c
  4. +28
    -0
      libavcodec/dca_exss.h
  5. +2
    -439
      libavcodec/dcadec.c

+ 1
- 1
libavcodec/Makefile View File

@@ -157,7 +157,7 @@ OBJS-$(CONFIG_COMFORTNOISE_ENCODER) += cngenc.o
OBJS-$(CONFIG_CSCD_DECODER) += cscd.o
OBJS-$(CONFIG_CYUV_DECODER) += cyuv.o
OBJS-$(CONFIG_DCA_DECODER) += dcadec.o dca.o dcadsp.o \
synth_filter.o
dca_exss.o synth_filter.o
OBJS-$(CONFIG_DFA_DECODER) += dfa.o
OBJS-$(CONFIG_DNXHD_DECODER) += dnxhddec.o dnxhddata.o
OBJS-$(CONFIG_DNXHD_ENCODER) += dnxhdenc.o dnxhddata.o


+ 149
- 0
libavcodec/dca.h View File

@@ -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];

/**


+ 322
- 0
libavcodec/dca_exss.c View File

@@ -0,0 +1,322 @@
/*
* DCA ExSS extension
*
* 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
*/

#include "libavutil/common.h"
#include "libavutil/log.h"

#include "dca.h"
#include "dca_exss.h"
#include "get_bits.h"

/* extensions that reside in core substream */
#define DCA_CORE_EXTS (DCA_EXT_XCH | DCA_EXT_XXCH | DCA_EXT_X96)

/* these are unconfirmed but should be mostly correct */
enum DCAExSSSpeakerMask {
DCA_EXSS_FRONT_CENTER = 0x0001,
DCA_EXSS_FRONT_LEFT_RIGHT = 0x0002,
DCA_EXSS_SIDE_REAR_LEFT_RIGHT = 0x0004,
DCA_EXSS_LFE = 0x0008,
DCA_EXSS_REAR_CENTER = 0x0010,
DCA_EXSS_FRONT_HIGH_LEFT_RIGHT = 0x0020,
DCA_EXSS_REAR_LEFT_RIGHT = 0x0040,
DCA_EXSS_FRONT_HIGH_CENTER = 0x0080,
DCA_EXSS_OVERHEAD = 0x0100,
DCA_EXSS_CENTER_LEFT_RIGHT = 0x0200,
DCA_EXSS_WIDE_LEFT_RIGHT = 0x0400,
DCA_EXSS_SIDE_LEFT_RIGHT = 0x0800,
DCA_EXSS_LFE2 = 0x1000,
DCA_EXSS_SIDE_HIGH_LEFT_RIGHT = 0x2000,
DCA_EXSS_REAR_HIGH_CENTER = 0x4000,
DCA_EXSS_REAR_HIGH_LEFT_RIGHT = 0x8000,
};

/**
* Return the number of channels in an ExSS speaker mask (HD)
*/
static int dca_exss_mask2count(int mask)
{
/* count bits that mean speaker pairs twice */
return av_popcount(mask) +
av_popcount(mask & (DCA_EXSS_CENTER_LEFT_RIGHT |
DCA_EXSS_FRONT_LEFT_RIGHT |
DCA_EXSS_FRONT_HIGH_LEFT_RIGHT |
DCA_EXSS_WIDE_LEFT_RIGHT |
DCA_EXSS_SIDE_LEFT_RIGHT |
DCA_EXSS_SIDE_HIGH_LEFT_RIGHT |
DCA_EXSS_SIDE_REAR_LEFT_RIGHT |
DCA_EXSS_REAR_LEFT_RIGHT |
DCA_EXSS_REAR_HIGH_LEFT_RIGHT));
}

/**
* Skip mixing coefficients of a single mix out configuration (HD)
*/
static void dca_exss_skip_mix_coeffs(GetBitContext *gb, int channels, int out_ch)
{
int i;

for (i = 0; i < channels; i++) {
int mix_map_mask = get_bits(gb, out_ch);
int num_coeffs = av_popcount(mix_map_mask);
skip_bits_long(gb, num_coeffs * 6);
}
}

/**
* Parse extension substream asset header (HD)
*/
static int dca_exss_parse_asset_header(DCAContext *s)
{
int header_pos = get_bits_count(&s->gb);
int header_size;
int channels = 0;
int embedded_stereo = 0;
int embedded_6ch = 0;
int drc_code_present;
int extensions_mask = 0;
int i, j;

if (get_bits_left(&s->gb) < 16)
return -1;

/* We will parse just enough to get to the extensions bitmask with which
* we can set the profile value. */

header_size = get_bits(&s->gb, 9) + 1;
skip_bits(&s->gb, 3); // asset index

if (s->static_fields) {
if (get_bits1(&s->gb))
skip_bits(&s->gb, 4); // asset type descriptor
if (get_bits1(&s->gb))
skip_bits_long(&s->gb, 24); // language descriptor

if (get_bits1(&s->gb)) {
/* How can one fit 1024 bytes of text here if the maximum value
* for the asset header size field above was 512 bytes? */
int text_length = get_bits(&s->gb, 10) + 1;
if (get_bits_left(&s->gb) < text_length * 8)
return -1;
skip_bits_long(&s->gb, text_length * 8); // info text
}

skip_bits(&s->gb, 5); // bit resolution - 1
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
int spkr_remap_sets;
int spkr_mask_size = 16;
int num_spkrs[7];

if (channels > 2)
embedded_stereo = get_bits1(&s->gb);
if (channels > 6)
embedded_6ch = get_bits1(&s->gb);

if (get_bits1(&s->gb)) {
spkr_mask_size = (get_bits(&s->gb, 2) + 1) << 2;
skip_bits(&s->gb, spkr_mask_size); // spkr activity mask
}

spkr_remap_sets = get_bits(&s->gb, 3);

for (i = 0; i < spkr_remap_sets; i++) {
/* std layout mask for each remap set */
num_spkrs[i] = dca_exss_mask2count(get_bits(&s->gb, spkr_mask_size));
}

for (i = 0; i < spkr_remap_sets; i++) {
int num_dec_ch_remaps = get_bits(&s->gb, 5) + 1;
if (get_bits_left(&s->gb) < 0)
return -1;

for (j = 0; j < num_spkrs[i]; j++) {
int remap_dec_ch_mask = get_bits_long(&s->gb, num_dec_ch_remaps);
int num_dec_ch = av_popcount(remap_dec_ch_mask);
skip_bits_long(&s->gb, num_dec_ch * 5); // remap codes
}
}
} else {
skip_bits(&s->gb, 3); // representation type
}
}

drc_code_present = get_bits1(&s->gb);
if (drc_code_present)
get_bits(&s->gb, 8); // drc code

if (get_bits1(&s->gb))
skip_bits(&s->gb, 5); // dialog normalization code

if (drc_code_present && embedded_stereo)
get_bits(&s->gb, 8); // drc stereo code

if (s->mix_metadata && get_bits1(&s->gb)) {
skip_bits(&s->gb, 1); // external mix
skip_bits(&s->gb, 6); // post mix gain code

if (get_bits(&s->gb, 2) != 3) // mixer drc code
skip_bits(&s->gb, 3); // drc limit
else
skip_bits(&s->gb, 8); // custom drc code

if (get_bits1(&s->gb)) // channel specific scaling
for (i = 0; i < s->num_mix_configs; i++)
skip_bits_long(&s->gb, s->mix_config_num_ch[i] * 6); // scale codes
else
skip_bits_long(&s->gb, s->num_mix_configs * 6); // scale codes

for (i = 0; i < s->num_mix_configs; i++) {
if (get_bits_left(&s->gb) < 0)
return -1;
dca_exss_skip_mix_coeffs(&s->gb, channels, s->mix_config_num_ch[i]);
if (embedded_6ch)
dca_exss_skip_mix_coeffs(&s->gb, 6, s->mix_config_num_ch[i]);
if (embedded_stereo)
dca_exss_skip_mix_coeffs(&s->gb, 2, s->mix_config_num_ch[i]);
}
}

switch (get_bits(&s->gb, 2)) {
case 0:
extensions_mask = get_bits(&s->gb, 12);
break;
case 1:
extensions_mask = DCA_EXT_EXSS_XLL;
break;
case 2:
extensions_mask = DCA_EXT_EXSS_LBR;
break;
case 3:
extensions_mask = 0; /* aux coding */
break;
}

/* not parsed further, we were only interested in the extensions mask */

if (get_bits_left(&s->gb) < 0)
return -1;

if (get_bits_count(&s->gb) - header_pos > header_size * 8) {
av_log(s->avctx, AV_LOG_WARNING, "Asset header size mismatch.\n");
return -1;
}
skip_bits_long(&s->gb, header_pos + header_size * 8 - get_bits_count(&s->gb));

if (extensions_mask & DCA_EXT_EXSS_XLL)
s->profile = FF_PROFILE_DTS_HD_MA;
else if (extensions_mask & (DCA_EXT_EXSS_XBR | DCA_EXT_EXSS_X96 |
DCA_EXT_EXSS_XXCH))
s->profile = FF_PROFILE_DTS_HD_HRA;

if (!(extensions_mask & DCA_EXT_CORE))
av_log(s->avctx, AV_LOG_WARNING, "DTS core detection mismatch.\n");
if ((extensions_mask & DCA_CORE_EXTS) != s->core_ext_mask)
av_log(s->avctx, AV_LOG_WARNING,
"DTS extensions detection mismatch (%d, %d)\n",
extensions_mask & DCA_CORE_EXTS, s->core_ext_mask);

return 0;
}

/**
* Parse extension substream header (HD)
*/
void ff_dca_exss_parse_header(DCAContext *s)
{
int ss_index;
int blownup;
int num_audiop = 1;
int num_assets = 1;
int active_ss_mask[8];
int i, j;

if (get_bits_left(&s->gb) < 52)
return;

skip_bits(&s->gb, 8); // user data
ss_index = get_bits(&s->gb, 2);

blownup = get_bits1(&s->gb);
skip_bits(&s->gb, 8 + 4 * blownup); // header_size
skip_bits(&s->gb, 16 + 4 * blownup); // hd_size

s->static_fields = get_bits1(&s->gb);
if (s->static_fields) {
skip_bits(&s->gb, 2); // reference clock code
skip_bits(&s->gb, 3); // frame duration code

if (get_bits1(&s->gb))
skip_bits_long(&s->gb, 36); // timestamp

/* a single stream can contain multiple audio assets that can be
* combined to form multiple audio presentations */

num_audiop = get_bits(&s->gb, 3) + 1;
if (num_audiop > 1) {
avpriv_request_sample(s->avctx,
"Multiple DTS-HD audio presentations");
/* ignore such streams for now */
return;
}

num_assets = get_bits(&s->gb, 3) + 1;
if (num_assets > 1) {
avpriv_request_sample(s->avctx, "Multiple DTS-HD audio assets");
/* ignore such streams for now */
return;
}

for (i = 0; i < num_audiop; i++)
active_ss_mask[i] = get_bits(&s->gb, ss_index + 1);

for (i = 0; i < num_audiop; i++)
for (j = 0; j <= ss_index; j++)
if (active_ss_mask[i] & (1 << j))
skip_bits(&s->gb, 8); // active asset mask

s->mix_metadata = get_bits1(&s->gb);
if (s->mix_metadata) {
int mix_out_mask_size;

skip_bits(&s->gb, 2); // adjustment level
mix_out_mask_size = (get_bits(&s->gb, 2) + 1) << 2;
s->num_mix_configs = get_bits(&s->gb, 2) + 1;

for (i = 0; i < s->num_mix_configs; i++) {
int mix_out_mask = get_bits(&s->gb, mix_out_mask_size);
s->mix_config_num_ch[i] = dca_exss_mask2count(mix_out_mask);
}
}
}

for (i = 0; i < num_assets; i++)
skip_bits_long(&s->gb, 16 + 4 * blownup); // asset size

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 */
}

+ 28
- 0
libavcodec/dca_exss.h View File

@@ -0,0 +1,28 @@
/*
* DCA ExSS extension
*
* 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_EXSS_H
#define AVCODEC_DCA_EXSS_H

#include "dca.h"

void ff_dca_exss_parse_header(DCAContext *s);

#endif /* AVCODEC_DCA_EXSS_H */

+ 2
- 439
libavcodec/dcadec.c View File

@@ -40,6 +40,7 @@
#include "dcadata.h"
#include "dcadsp.h"
#include "dcahuff.h"
#include "dca_exss.h"
#include "fft.h"
#include "fmtconvert.h"
#include "get_bits.h"
@@ -54,13 +55,6 @@

//#define TRACE

#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)

enum DCAMode {
DCA_MONO = 0,
DCA_CHANNEL,
@@ -75,39 +69,6 @@ enum DCAMode {
DCA_4F2R
};

/* these are unconfirmed but should be mostly correct */
enum DCAExSSSpeakerMask {
DCA_EXSS_FRONT_CENTER = 0x0001,
DCA_EXSS_FRONT_LEFT_RIGHT = 0x0002,
DCA_EXSS_SIDE_REAR_LEFT_RIGHT = 0x0004,
DCA_EXSS_LFE = 0x0008,
DCA_EXSS_REAR_CENTER = 0x0010,
DCA_EXSS_FRONT_HIGH_LEFT_RIGHT = 0x0020,
DCA_EXSS_REAR_LEFT_RIGHT = 0x0040,
DCA_EXSS_FRONT_HIGH_CENTER = 0x0080,
DCA_EXSS_OVERHEAD = 0x0100,
DCA_EXSS_CENTER_LEFT_RIGHT = 0x0200,
DCA_EXSS_WIDE_LEFT_RIGHT = 0x0400,
DCA_EXSS_SIDE_LEFT_RIGHT = 0x0800,
DCA_EXSS_LFE2 = 0x1000,
DCA_EXSS_SIDE_HIGH_LEFT_RIGHT = 0x2000,
DCA_EXSS_REAR_HIGH_CENTER = 0x4000,
DCA_EXSS_REAR_HIGH_LEFT_RIGHT = 0x8000,
};

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
};

/* -1 are reserved or unknown */
static const int dca_ext_audio_descr_mask[] = {
DCA_EXT_XCH,
@@ -120,9 +81,6 @@ static const int dca_ext_audio_descr_mask[] = {
-1,
};

/* extensions that reside in core substream */
#define DCA_CORE_EXTS (DCA_EXT_XCH | DCA_EXT_XXCH | DCA_EXT_X96)

/* Tables for mapping dts channel configurations to libavcodec multichannel api.
* Some compromises have been made for special configurations. Most configurations
* are never used so complete accuracy is not needed.
@@ -258,11 +216,6 @@ static const int8_t dca_channel_reorder_nolfe_xch[][9] = {

#define HEADER_SIZE 14

#define DCA_MAX_FRAME_SIZE 16384
#define DCA_MAX_EXSS_HEADER_SIZE 4096

#define DCA_BUFFER_PADDING_SIZE 1024

#define DCA_NSYNCAUX 0x9A1105A0

/** Bit allocation */
@@ -285,123 +238,6 @@ static av_always_inline int get_bitalloc(GetBitContext *gb, BitAlloc *ba,
ba->offset;
}

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;

static const uint16_t dca_vlc_offs[] = {
0, 512, 640, 768, 1282, 1794, 2436, 3080, 3770, 4454, 5364,
5372, 5380, 5388, 5392, 5396, 5412, 5420, 5428, 5460, 5492, 5508,
@@ -1423,279 +1259,6 @@ static int dca_decode_block(DCAContext *s, int base_channel, int block_index)
return 0;
}

/**
* Return the number of channels in an ExSS speaker mask (HD)
*/
static int dca_exss_mask2count(int mask)
{
/* count bits that mean speaker pairs twice */
return av_popcount(mask) +
av_popcount(mask & (DCA_EXSS_CENTER_LEFT_RIGHT |
DCA_EXSS_FRONT_LEFT_RIGHT |
DCA_EXSS_FRONT_HIGH_LEFT_RIGHT |
DCA_EXSS_WIDE_LEFT_RIGHT |
DCA_EXSS_SIDE_LEFT_RIGHT |
DCA_EXSS_SIDE_HIGH_LEFT_RIGHT |
DCA_EXSS_SIDE_REAR_LEFT_RIGHT |
DCA_EXSS_REAR_LEFT_RIGHT |
DCA_EXSS_REAR_HIGH_LEFT_RIGHT));
}

/**
* Skip mixing coefficients of a single mix out configuration (HD)
*/
static void dca_exss_skip_mix_coeffs(GetBitContext *gb, int channels, int out_ch)
{
int i;

for (i = 0; i < channels; i++) {
int mix_map_mask = get_bits(gb, out_ch);
int num_coeffs = av_popcount(mix_map_mask);
skip_bits_long(gb, num_coeffs * 6);
}
}

/**
* Parse extension substream asset header (HD)
*/
static int dca_exss_parse_asset_header(DCAContext *s)
{
int header_pos = get_bits_count(&s->gb);
int header_size;
int channels = 0;
int embedded_stereo = 0;
int embedded_6ch = 0;
int drc_code_present;
int extensions_mask = 0;
int i, j;

if (get_bits_left(&s->gb) < 16)
return -1;

/* We will parse just enough to get to the extensions bitmask with which
* we can set the profile value. */

header_size = get_bits(&s->gb, 9) + 1;
skip_bits(&s->gb, 3); // asset index

if (s->static_fields) {
if (get_bits1(&s->gb))
skip_bits(&s->gb, 4); // asset type descriptor
if (get_bits1(&s->gb))
skip_bits_long(&s->gb, 24); // language descriptor

if (get_bits1(&s->gb)) {
/* How can one fit 1024 bytes of text here if the maximum value
* for the asset header size field above was 512 bytes? */
int text_length = get_bits(&s->gb, 10) + 1;
if (get_bits_left(&s->gb) < text_length * 8)
return -1;
skip_bits_long(&s->gb, text_length * 8); // info text
}

skip_bits(&s->gb, 5); // bit resolution - 1
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
int spkr_remap_sets;
int spkr_mask_size = 16;
int num_spkrs[7];

if (channels > 2)
embedded_stereo = get_bits1(&s->gb);
if (channels > 6)
embedded_6ch = get_bits1(&s->gb);

if (get_bits1(&s->gb)) {
spkr_mask_size = (get_bits(&s->gb, 2) + 1) << 2;
skip_bits(&s->gb, spkr_mask_size); // spkr activity mask
}

spkr_remap_sets = get_bits(&s->gb, 3);

for (i = 0; i < spkr_remap_sets; i++) {
/* std layout mask for each remap set */
num_spkrs[i] = dca_exss_mask2count(get_bits(&s->gb, spkr_mask_size));
}

for (i = 0; i < spkr_remap_sets; i++) {
int num_dec_ch_remaps = get_bits(&s->gb, 5) + 1;
if (get_bits_left(&s->gb) < 0)
return -1;

for (j = 0; j < num_spkrs[i]; j++) {
int remap_dec_ch_mask = get_bits_long(&s->gb, num_dec_ch_remaps);
int num_dec_ch = av_popcount(remap_dec_ch_mask);
skip_bits_long(&s->gb, num_dec_ch * 5); // remap codes
}
}
} else {
skip_bits(&s->gb, 3); // representation type
}
}

drc_code_present = get_bits1(&s->gb);
if (drc_code_present)
get_bits(&s->gb, 8); // drc code

if (get_bits1(&s->gb))
skip_bits(&s->gb, 5); // dialog normalization code

if (drc_code_present && embedded_stereo)
get_bits(&s->gb, 8); // drc stereo code

if (s->mix_metadata && get_bits1(&s->gb)) {
skip_bits(&s->gb, 1); // external mix
skip_bits(&s->gb, 6); // post mix gain code

if (get_bits(&s->gb, 2) != 3) // mixer drc code
skip_bits(&s->gb, 3); // drc limit
else
skip_bits(&s->gb, 8); // custom drc code

if (get_bits1(&s->gb)) // channel specific scaling
for (i = 0; i < s->num_mix_configs; i++)
skip_bits_long(&s->gb, s->mix_config_num_ch[i] * 6); // scale codes
else
skip_bits_long(&s->gb, s->num_mix_configs * 6); // scale codes

for (i = 0; i < s->num_mix_configs; i++) {
if (get_bits_left(&s->gb) < 0)
return -1;
dca_exss_skip_mix_coeffs(&s->gb, channels, s->mix_config_num_ch[i]);
if (embedded_6ch)
dca_exss_skip_mix_coeffs(&s->gb, 6, s->mix_config_num_ch[i]);
if (embedded_stereo)
dca_exss_skip_mix_coeffs(&s->gb, 2, s->mix_config_num_ch[i]);
}
}

switch (get_bits(&s->gb, 2)) {
case 0:
extensions_mask = get_bits(&s->gb, 12);
break;
case 1:
extensions_mask = DCA_EXT_EXSS_XLL;
break;
case 2:
extensions_mask = DCA_EXT_EXSS_LBR;
break;
case 3:
extensions_mask = 0; /* aux coding */
break;
}

/* not parsed further, we were only interested in the extensions mask */

if (get_bits_left(&s->gb) < 0)
return -1;

if (get_bits_count(&s->gb) - header_pos > header_size * 8) {
av_log(s->avctx, AV_LOG_WARNING, "Asset header size mismatch.\n");
return -1;
}
skip_bits_long(&s->gb, header_pos + header_size * 8 - get_bits_count(&s->gb));

if (extensions_mask & DCA_EXT_EXSS_XLL)
s->profile = FF_PROFILE_DTS_HD_MA;
else if (extensions_mask & (DCA_EXT_EXSS_XBR | DCA_EXT_EXSS_X96 |
DCA_EXT_EXSS_XXCH))
s->profile = FF_PROFILE_DTS_HD_HRA;

if (!(extensions_mask & DCA_EXT_CORE))
av_log(s->avctx, AV_LOG_WARNING, "DTS core detection mismatch.\n");
if ((extensions_mask & DCA_CORE_EXTS) != s->core_ext_mask)
av_log(s->avctx, AV_LOG_WARNING,
"DTS extensions detection mismatch (%d, %d)\n",
extensions_mask & DCA_CORE_EXTS, s->core_ext_mask);

return 0;
}

/**
* Parse extension substream header (HD)
*/
static void dca_exss_parse_header(DCAContext *s)
{
int ss_index;
int blownup;
int num_audiop = 1;
int num_assets = 1;
int active_ss_mask[8];
int i, j;

if (get_bits_left(&s->gb) < 52)
return;

skip_bits(&s->gb, 8); // user data
ss_index = get_bits(&s->gb, 2);

blownup = get_bits1(&s->gb);
skip_bits(&s->gb, 8 + 4 * blownup); // header_size
skip_bits(&s->gb, 16 + 4 * blownup); // hd_size

s->static_fields = get_bits1(&s->gb);
if (s->static_fields) {
skip_bits(&s->gb, 2); // reference clock code
skip_bits(&s->gb, 3); // frame duration code

if (get_bits1(&s->gb))
skip_bits_long(&s->gb, 36); // timestamp

/* a single stream can contain multiple audio assets that can be
* combined to form multiple audio presentations */

num_audiop = get_bits(&s->gb, 3) + 1;
if (num_audiop > 1) {
avpriv_request_sample(s->avctx,
"Multiple DTS-HD audio presentations");
/* ignore such streams for now */
return;
}

num_assets = get_bits(&s->gb, 3) + 1;
if (num_assets > 1) {
avpriv_request_sample(s->avctx, "Multiple DTS-HD audio assets");
/* ignore such streams for now */
return;
}

for (i = 0; i < num_audiop; i++)
active_ss_mask[i] = get_bits(&s->gb, ss_index + 1);

for (i = 0; i < num_audiop; i++)
for (j = 0; j <= ss_index; j++)
if (active_ss_mask[i] & (1 << j))
skip_bits(&s->gb, 8); // active asset mask

s->mix_metadata = get_bits1(&s->gb);
if (s->mix_metadata) {
int mix_out_mask_size;

skip_bits(&s->gb, 2); // adjustment level
mix_out_mask_size = (get_bits(&s->gb, 2) + 1) << 2;
s->num_mix_configs = get_bits(&s->gb, 2) + 1;

for (i = 0; i < s->num_mix_configs; i++) {
int mix_out_mask = get_bits(&s->gb, mix_out_mask_size);
s->mix_config_num_ch[i] = dca_exss_mask2count(mix_out_mask);
}
}
}

for (i = 0; i < num_assets; i++)
skip_bits_long(&s->gb, 16 + 4 * blownup); // asset size

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 */
}

static float dca_dmix_code(unsigned code)
{
int sign = (code >> 8) - 1;
@@ -1847,7 +1410,7 @@ static int dca_decode_frame(AVCodecContext *avctx, void *data,
/* check for ExSS (HD part) */
if (s->dca_buffer_size - s->frame_size > 32 &&
get_bits_long(&s->gb, 32) == DCA_HD_MARKER)
dca_exss_parse_header(s);
ff_dca_exss_parse_header(s);

avctx->profile = s->profile;



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