dcaenc: update

Long story short: previous code was useless and was port of older
dcaenc, this commit just "sync" with current dcaenc, hopefuly
making this encoder more useful.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

1 files changed, 84 insertions, 517 deletions

diff --git a/libavcodec/dcaenc.h b/libavcodec/dcaenc.h
index 121e5da..20f557b 100644
--- a/libavcodec/dcaenc.h
+++ b/libavcodec/dcaenc.h
@@ -1,6 +1,6 @@
 /*
  * DCA encoder tables
- * Copyright (C) 2008 Alexander E. Patrakov
+ * Copyright (C) 2008-2012 Alexander E. Patrakov
  *
  * This file is part of FFmpeg.
  *
@@ -24,523 +24,90 @@
 
 #include <stdint.h>
 
-/* This is a scaled version of the response of the reference decoder to
-   this vector of subband samples: ( 1.0 0.0 0.0 ... 0.0 )
-   */
+typedef struct {
+    int32_t m;
+    int32_t e;
+} softfloat;
 
-static const int32_t UnQMF[512] = {
-    7,
-    4,
-    -961,
-    -2844,
-    -8024,
-    -18978,
-    -32081,
-    -15635,
-    -16582,
-    -18359,
-    -17180,
-    -14868,
-    -11664,
-    -8051,
-    -4477,
-    -1327,
-    -1670,
-    -6019,
-    -11590,
-    -18030,
-    -24762,
-    -30965,
-    -35947,
-    -36145,
-    -37223,
-    -86311,
-    -57024,
-    -27215,
-    -11274,
-    -4684,
-    42,
-    108,
-    188,
-    250,
-    -1007,
-    -596,
-    -2289,
-    -12218,
-    -27191,
-    -124367,
-    -184256,
-    -250538,
-    -323499,
-    -397784,
-    -468855,
-    -532072,
-    -583000,
-    -618041,
-    -777916,
-    -783868,
-    -765968,
-    -724740,
-    -662468,
-    -583058,
-    -490548,
-    -401623,
-    -296090,
-    -73154,
-    -36711,
-    -7766,
-    -2363,
-    -4905,
-    2388,
-    2681,
-    5651,
-    4086,
-    71110,
-    139742,
-    188067,
-    151237,
-    101355,
-    309917,
-    343690,
-    358839,
-    357555,
-    334606,
-    289625,
-    224152,
-    142063,
-    48725,
-    74996,
-    238425,
-    411666,
-    584160,
-    744276,
-    880730,
-    983272,
-    1041933,
-    1054396,
-    789531,
-    851022,
-    864032,
-    675431,
-    418134,
-    35762,
-    66911,
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-    136403,
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-    -245269,
-    -499595,
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-    -1136858,
-    -2010912,
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-    -3151901,
-    -3696328,
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-    -4993229,
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-    -477650,
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-    -1677468,
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-    -2341196,
-    -2373915,
-    -2269552,
-    -2620489,
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-    -946595,
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-    3414913,
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-    -1404936,
-    -1871278,
-    -2229831,
-    -2440932,
-    -2462684,
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-    36868007,
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-    86089058,
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-    108136061,
-    114970055,
-    121718321,
-    127566038,
-    132774642,
-    137247294,
-    140894737,
-    143635018,
-    145395599,
-    146114032,
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-    141594341,
-    137808404,
-    132914122,
-    126912246,
-    120243281,
-    112155281,
-    103338368,
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-    72921548,
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-    -5475538,
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-    347168648,
-    399634888,
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-    702597163,
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-    903618096,
-    971159680,
-    1038137214,
-    1103987353,
-    1168195035,
-    1230223053,
-    1289539180,
-    1345620373,
-    1397957958,
-    1446063657,
-    1489474689,
-    1527740502,
-    1560502307,
-    1587383079,
-    1608071145,
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-    1630584888,
-    1624373875,
-    1611178348,
-    1591018893,
-    1563948667,
-    1530105004,
-    1489673227,
-    1442904075,
-    1390107674,
-    1331590427,
-    1267779478,
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-    1126053392,
-    1049146257,
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-    885965976,
-    800851610,
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-    626590147,
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-    364299927,
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-    115109565,
-    37503924,
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-    -106668063,
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-    -233487283,
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-    -340448569,
-    -385919511,
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-    -539436808,
-    -527630488,
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-    -492941605,
-    -470665204,
-    -445668379,
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-    -358293846,
-    -326396227,
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-    -227825056,
-    -195208961,
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-    -102533727,
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-    -22817785,
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-    39167253,
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-    81242430,
-    90795329,
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-    103540643,
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-    108539682,
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-    99043289,
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-    64603428,
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-    16376190,
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-    -25035583,
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-    -23346408,
-    -21860411,
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-    -14968728,
-    -12487138,
-    -9656319,
-    -7846681,
-    -5197816,
-    -2621904,
-    -144953,
-    2144746,
-    3990570,
-    5845884,
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-    9929891,
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-    11390921,
-    11762056,
-    11916017,
-    12261189,
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-    11815303,
-    11374622,
-    10815301,
-    10157241,
-    9418799,
-    8629399,
-    7780776,
-    7303680,
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-    5392738,
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-    3543062,
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-    1084092,
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-    -151008,
-    -666667,
-    -1032157,
-    -1231475,
-    -1319043,
-    -1006023,
-    -915720,
-    -773426,
-    -612377,
-    -445864,
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-    -161337,
-    -66484,
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-    133453,
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-    1022911,
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-    995854,
-    891376,
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-    457992,
-    316365,
-    172738,
-    43037,
-    -117662,
-    -98542,
-    -70279,
-    -41458,
-    -535790,
-    -959038,
-    -1364456,
-    -1502265,
-    -1568530,
-    -2378681,
-    -2701111,
-    -2976407,
-    -3182552,
-    -3314415,
-    -3366600,
-    -3337701,
-    -3232252,
-    -3054999,
-    1984841,
-    1925903,
-    1817377,
-    1669153,
-    1490069,
-    1292040,
-    1086223,
-    890983,
-    699163,
-    201358,
-    266971,
-    296990,
-    198419,
-    91119,
-    4737,
-    5936,
-    2553,
-    2060,
-    -3828,
-    -1664,
-    -4917,
-    -20796,
-    -36822,
-    -131247,
-    -154923,
-    -162055,
-    -161354,
-    -148762,
-    -125754,
-    -94473,
-    -57821,
-    -19096,
-    15172,
-    43004,
-    65624,
-    81354,
-    89325,
-    89524,
-    82766,
-    71075,
-    55128,
-    13686,
-    6921,
-    1449,
-    420,
-    785,
-    -215,
-    -179,
-    -113,
-    -49,
-    6002,
-    16007,
-    42978,
-    100662,
-    171472,
-    83975,
-    93702,
-    108813,
-    111893,
-    110272,
-    103914,
-    93973,
-    81606,
-    68041,
-    -54058,
-    -60695,
-    -65277,
-    -67224,
-    -66213,
-    -62082,
-    -55574,
-    -42988,
-    -35272,
-    -63735,
-    -33501,
-    -12671,
-    -4038,
-    -1232,
-    5,
-    7
+static const int sample_rates[] = {
+    8000, 16000, 32000, 11025, 22050, 44100, 12000, 24000, 48000, 0,
+};
+
+static const uint8_t bitstream_sfreq[] = { 1, 2, 3, 6, 7, 8, 11, 12, 13 };
+
+/* Auditory filter center frequencies and bandwidths, in Hz.
+ * The last two are made up, because there is no scientific data.
+ */
+static uint16_t fc[] = {
+    50, 150, 250, 350, 450, 570, 700, 840, 1000, 1170, 1370, 1600, 1850, 2150,
+    2500, 2900, 3400, 4000, 4800, 5800, 7000, 8500, 10500, 13500, 17000
+};
+
+static uint16_t erb[] = {
+    80, 100, 100, 100, 110, 120, 140, 150, 160, 190, 210, 240, 280,
+    320, 380, 450, 550, 700, 900, 1100, 1300, 1800, 2500, 3500, 4500
+};
+
+static const softfloat stepsize_inv[27] = {
+    {0, 0}, {1342177360, 21}, {2147483647, 21}, {1342177360, 20},
+    {1819901661, 20}, {2147483647, 20}, {1278263843, 19}, {1579032492, 19},
+    {1412817763, 18}, {1220162327, 17}, {1118482133, 16}, {1917391412, 16},
+    {1766017772, 15}, {1525212826, 14}, {1290553940, 13}, {2097179000, 13},
+    {1677683200, 12}, {1497972244, 11}, {1310893147, 10}, {1165354136, 9},
+    {1748031204, 9}, {1542092044, 8}, {1636178017, 7}, {1636178017, 6},
+    {1636178017, 5}, {1636178017, 4}, {1636178017, 3},
+};
+
+static const softfloat scalefactor_inv[128] = {
+    {2147483647, 1}, {2147483647, 1}, {2147483647, 2}, {2147483647, 2},
+    {2147483647, 2}, {2147483647, 2}, {1431655765, 2}, {1431655765, 2},
+    {1431655765, 2}, {2147483647, 3}, {2147483647, 3}, {1717986918, 3},
+    {1431655765, 3}, {1227133513, 3}, {1227133513, 3}, {2147483647, 4},
+    {1717986918, 4}, {1561806289, 4}, {1431655765, 4}, {1227133513, 4},
+    {2147483647, 5}, {1908874353, 5}, {1717986918, 5}, {1493901668, 5},
+    {1321528398, 5}, {1145324612, 5}, {2021161080, 6}, {1808407282, 6},
+    {1561806289, 6}, {1374389534, 6}, {1227133513, 6}, {2147483647, 7},
+    {1908874353, 7}, {1676084798, 7}, {1477838209, 7}, {1296593900, 7},
+    {1145324612, 7}, {2021161080, 8}, {1773405851, 8}, {1561806289, 8},
+    {1374389534, 8}, {1216273924, 8}, {2139127680, 9}, {1882725390, 9},
+    {1660893697, 9}, {1462116526, 9}, {1287484341, 9}, {1135859119, 9},
+    {1999112050, 10}, {1762037865, 10}, {1552982525, 10}, {1367551775, 10},
+    {1205604855, 10}, {2124660150, 11}, {1871509153, 11}, {1648443220, 11},
+    {1452459217, 11}, {1279990253, 11}, {1127704233, 11}, {1987368509, 12},
+    {1750814693, 12}, {1542632939, 12}, {1359099663, 12}, {1197398995, 12},
+    {2109880792, 13}, {1858853132, 13}, {1638006149, 13}, {1443165385, 13},
+    {1271479187, 13}, {1120235993, 13}, {1973767086, 14}, {1739045674, 14},
+    {1532153461, 14}, {1349922194, 14}, {1189384493, 14}, {2095804865, 15},
+    {1846464029, 15}, {1626872524, 15}, {1433347133, 15}, {1262853884, 15},
+    {1112619678, 15}, {1960569045, 16}, {1727349015, 16}, {1521881227, 16},
+    {1340842289, 16}, {1181357555, 16}, {2081669156, 17}, {1834047752, 17},
+    {1615889229, 17}, {1423675973, 17}, {1254322457, 17}, {1105123583, 17},
+    {1947330755, 18}, {1715693602, 18}, {1511607799, 18}, {1331801790, 18},
+    {1173384427, 18}, {2067616532, 19}, {1821667648, 19}, {1604980024, 19},
+    {1414066955, 19}, {1245861410, 19}, {1097665748, 19}, {1934193616, 20},
+    {1704119624, 20}, {1501412075, 20}, {1322817107, 20}, {1165466323, 20},
+    {2053666205, 21}, {1809379407, 21}, {1594151671, 21}, {1404526328, 21},
+    {1237455941, 21}, {1090259329, 21}, {1921143210, 22}, {1692621231, 22},
+    {1491281857, 22}, {1313892269, 22}, {1157603482, 22}, {2039810470, 23},
+    {1797172644, 23}, {1583396912, 23}, {1395050052, 23}, {1229107276, 23},
+    {1082903494, 23}, {1082903494, 23}, {1082903494, 23}, {1082903494, 23},
+};
+
+/* manually derived from
+ * Table B.5: Selection of quantization levels and codebooks
+ * FIXME: will become invalid when Huffman codes are introduced.
+ */
+static const int bit_consumption[27] = {
+    -8, 28, 40, 48, 52, 60, 68, 76, 80, 96,
+    112, 128, 144, 160, 176, 192, 208, 224, 240, 256,
+    272, 288, 304, 320, 336, 352, 368,
+};
+
+/* Table B.5: Selection of quantization levels and codebooks */
+static const int quant_levels[27] = {
+    1, 3, 5, 7, 9, 13, 17, 25, 32, 64,
+    128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536,
+    131072, 262144, 524288, 1048576, 2097152, 4194304, 8388608,
 };
 
 #endif /* AVCODEC_DCAENC_H */