* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "libavutil/intreadwrite.h"
-#include "avcodec.h"
-#include "internal.h"
-#include "mathops.h"
-#include "audio_frame_queue.h"
-
-
-enum channels {
- LEFT,
- RIGHT,
- NB_CHANNELS
-};
-
-enum subbands {
- LF, // Low Frequency (0-5.5 kHz)
- MLF, // Medium-Low Frequency (5.5-11kHz)
- MHF, // Medium-High Frequency (11-16.5kHz)
- HF, // High Frequency (16.5-22kHz)
- NB_SUBBANDS
-};
-
-#define NB_FILTERS 2
-#define FILTER_TAPS 16
-
-typedef struct {
- int pos;
- int32_t buffer[2*FILTER_TAPS];
-} FilterSignal;
-
-typedef struct {
- FilterSignal outer_filter_signal[NB_FILTERS];
- FilterSignal inner_filter_signal[NB_FILTERS][NB_FILTERS];
-} QMFAnalysis;
-
-typedef struct {
- int32_t quantized_sample;
- int32_t quantized_sample_parity_change;
- int32_t error;
-} Quantize;
-
-typedef struct {
- int32_t quantization_factor;
- int32_t factor_select;
- int32_t reconstructed_difference;
-} InvertQuantize;
-
-typedef struct {
- int32_t prev_sign[2];
- int32_t s_weight[2];
- int32_t d_weight[24];
- int32_t pos;
- int32_t reconstructed_differences[48];
- int32_t previous_reconstructed_sample;
- int32_t predicted_difference;
- int32_t predicted_sample;
-} Prediction;
-
-typedef struct {
- int32_t codeword_history;
- int32_t dither_parity;
- int32_t dither[NB_SUBBANDS];
-
- QMFAnalysis qmf;
- Quantize quantize[NB_SUBBANDS];
- InvertQuantize invert_quantize[NB_SUBBANDS];
- Prediction prediction[NB_SUBBANDS];
-} Channel;
-
-typedef struct {
- int32_t sync_idx;
- Channel channels[NB_CHANNELS];
- AudioFrameQueue afq;
-} AptXContext;
+#include "aptx.h"
static const int32_t quantize_intervals_LF[65] = {
0, -8, 33, 95, 262,
};
-typedef const struct {
- const int32_t *quantize_intervals;
- const int32_t *invert_quantize_dither_factors;
- const int32_t *quantize_dither_factors;
- const int16_t *quantize_factor_select_offset;
- int tables_size;
- int32_t quantized_bits;
- int32_t prediction_order;
-} ConstTables;
-
-static ConstTables tables[NB_SUBBANDS] = {
- [LF] = { quantize_intervals_LF,
- invert_quantize_dither_factors_LF,
- quantize_dither_factors_LF,
- quantize_factor_select_offset_LF,
- FF_ARRAY_ELEMS(quantize_intervals_LF),
- 7, 24 },
- [MLF] = { quantize_intervals_MLF,
- invert_quantize_dither_factors_MLF,
- quantize_dither_factors_MLF,
- quantize_factor_select_offset_MLF,
- FF_ARRAY_ELEMS(quantize_intervals_MLF),
- 4, 12 },
- [MHF] = { quantize_intervals_MHF,
- invert_quantize_dither_factors_MHF,
- quantize_dither_factors_MHF,
- quantize_factor_select_offset_MHF,
- FF_ARRAY_ELEMS(quantize_intervals_MHF),
- 2, 6 },
- [HF] = { quantize_intervals_HF,
- invert_quantize_dither_factors_HF,
- quantize_dither_factors_HF,
- quantize_factor_select_offset_HF,
- FF_ARRAY_ELEMS(quantize_intervals_HF),
- 3, 12 },
+
+static const int32_t hd_quantize_intervals_LF[257] = {
+ -2436, 2436, 7308, 12180, 17054, 21930, 26806, 31686,
+ 36566, 41450, 46338, 51230, 56124, 61024, 65928, 70836,
+ 75750, 80670, 85598, 90530, 95470, 100418, 105372, 110336,
+ 115308, 120288, 125278, 130276, 135286, 140304, 145334, 150374,
+ 155426, 160490, 165566, 170654, 175756, 180870, 185998, 191138,
+ 196294, 201466, 206650, 211850, 217068, 222300, 227548, 232814,
+ 238096, 243396, 248714, 254050, 259406, 264778, 270172, 275584,
+ 281018, 286470, 291944, 297440, 302956, 308496, 314056, 319640,
+ 325248, 330878, 336532, 342212, 347916, 353644, 359398, 365178,
+ 370986, 376820, 382680, 388568, 394486, 400430, 406404, 412408,
+ 418442, 424506, 430600, 436726, 442884, 449074, 455298, 461554,
+ 467844, 474168, 480528, 486922, 493354, 499820, 506324, 512866,
+ 519446, 526064, 532722, 539420, 546160, 552940, 559760, 566624,
+ 573532, 580482, 587478, 594520, 601606, 608740, 615920, 623148,
+ 630426, 637754, 645132, 652560, 660042, 667576, 675164, 682808,
+ 690506, 698262, 706074, 713946, 721876, 729868, 737920, 746036,
+ 754216, 762460, 770770, 779148, 787594, 796108, 804694, 813354,
+ 822086, 830892, 839774, 848736, 857776, 866896, 876100, 885386,
+ 894758, 904218, 913766, 923406, 933138, 942964, 952886, 962908,
+ 973030, 983254, 993582, 1004020, 1014566, 1025224, 1035996, 1046886,
+ 1057894, 1069026, 1080284, 1091670, 1103186, 1114838, 1126628, 1138558,
+ 1150634, 1162858, 1175236, 1187768, 1200462, 1213320, 1226346, 1239548,
+ 1252928, 1266490, 1280242, 1294188, 1308334, 1322688, 1337252, 1352034,
+ 1367044, 1382284, 1397766, 1413494, 1429478, 1445728, 1462252, 1479058,
+ 1496158, 1513562, 1531280, 1549326, 1567710, 1586446, 1605550, 1625034,
+ 1644914, 1665208, 1685932, 1707108, 1728754, 1750890, 1773542, 1796732,
+ 1820488, 1844840, 1869816, 1895452, 1921780, 1948842, 1976680, 2005338,
+ 2034868, 2065322, 2096766, 2129260, 2162880, 2197708, 2233832, 2271352,
+ 2310384, 2351050, 2393498, 2437886, 2484404, 2533262, 2584710, 2639036,
+ 2696578, 2757738, 2822998, 2892940, 2968278, 3049896, 3138912, 3236760,
+ 3345312, 3467068, 3605434, 3765154, 3952904, 4177962, 4452178, 4787134,
+ 5187290, 5647128, 6159120, 6720518, 7332904, 8000032, 8726664, 9518152,
+ 10380372,
+};
+static const int32_t hd_invert_quantize_dither_factors_LF[257] = {
+ 2436, 2436, 2436, 2436, 2438, 2438, 2438, 2440,
+ 2442, 2442, 2444, 2446, 2448, 2450, 2454, 2456,
+ 2458, 2462, 2464, 2468, 2472, 2476, 2480, 2484,
+ 2488, 2492, 2498, 2502, 2506, 2512, 2518, 2524,
+ 2528, 2534, 2540, 2548, 2554, 2560, 2568, 2574,
+ 2582, 2588, 2596, 2604, 2612, 2620, 2628, 2636,
+ 2646, 2654, 2664, 2672, 2682, 2692, 2702, 2712,
+ 2722, 2732, 2742, 2752, 2764, 2774, 2786, 2798,
+ 2810, 2822, 2834, 2846, 2858, 2870, 2884, 2896,
+ 2910, 2924, 2938, 2952, 2966, 2980, 2994, 3010,
+ 3024, 3040, 3056, 3070, 3086, 3104, 3120, 3136,
+ 3154, 3170, 3188, 3206, 3224, 3242, 3262, 3280,
+ 3300, 3320, 3338, 3360, 3380, 3400, 3422, 3442,
+ 3464, 3486, 3508, 3532, 3554, 3578, 3602, 3626,
+ 3652, 3676, 3702, 3728, 3754, 3780, 3808, 3836,
+ 3864, 3892, 3920, 3950, 3980, 4010, 4042, 4074,
+ 4106, 4138, 4172, 4206, 4240, 4276, 4312, 4348,
+ 4384, 4422, 4460, 4500, 4540, 4580, 4622, 4664,
+ 4708, 4752, 4796, 4842, 4890, 4938, 4986, 5036,
+ 5086, 5138, 5192, 5246, 5300, 5358, 5416, 5474,
+ 5534, 5596, 5660, 5726, 5792, 5860, 5930, 6002,
+ 6074, 6150, 6226, 6306, 6388, 6470, 6556, 6644,
+ 6736, 6828, 6924, 7022, 7124, 7228, 7336, 7448,
+ 7562, 7680, 7802, 7928, 8058, 8192, 8332, 8476,
+ 8624, 8780, 8940, 9106, 9278, 9458, 9644, 9840,
+ 10042, 10252, 10472, 10702, 10942, 11194, 11458, 11734,
+ 12024, 12328, 12648, 12986, 13342, 13720, 14118, 14540,
+ 14990, 15466, 15976, 16520, 17102, 17726, 18398, 19124,
+ 19908, 20760, 21688, 22702, 23816, 25044, 26404, 27922,
+ 29622, 31540, 33720, 36222, 39116, 42502, 46514, 51334,
+ 57218, 64536, 73830, 85890, 101860, 123198, 151020, 183936,
+ 216220, 243618, 268374, 293022, 319362, 347768, 378864, 412626, 449596,
+};
+static const int32_t hd_quantize_dither_factors_LF[256] = {
+ 0, 0, 0, 1, 0, 0, 1, 1,
+ 0, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 2, 1, 1, 2, 2, 2, 1,
+ 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 3,
+ 2, 3, 2, 3, 3, 3, 3, 3,
+ 3, 3, 3, 3, 3, 3, 3, 3,
+ 3, 3, 3, 3, 3, 4, 3, 4,
+ 4, 4, 4, 4, 4, 4, 4, 4,
+ 4, 4, 4, 4, 5, 4, 4, 5,
+ 4, 5, 5, 5, 5, 5, 5, 5,
+ 5, 5, 6, 5, 5, 6, 5, 6,
+ 6, 6, 6, 6, 6, 6, 6, 7,
+ 6, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 8, 8, 8, 8, 8, 8,
+ 8, 9, 9, 9, 9, 9, 9, 9,
+ 10, 10, 10, 10, 10, 11, 11, 11,
+ 11, 11, 12, 12, 12, 12, 13, 13,
+ 13, 14, 14, 14, 15, 15, 15, 15,
+ 16, 16, 17, 17, 17, 18, 18, 18,
+ 19, 19, 20, 21, 21, 22, 22, 23,
+ 23, 24, 25, 26, 26, 27, 28, 29,
+ 30, 31, 32, 33, 34, 35, 36, 37,
+ 39, 40, 42, 43, 45, 47, 49, 51,
+ 53, 55, 58, 60, 63, 66, 69, 73,
+ 76, 80, 85, 89, 95, 100, 106, 113,
+ 119, 128, 136, 146, 156, 168, 182, 196,
+ 213, 232, 254, 279, 307, 340, 380, 425,
+ 480, 545, 626, 724, 847, 1003, 1205, 1471,
+ 1830, 2324, 3015, 3993, 5335, 6956, 8229, 8071,
+ 6850, 6189, 6162, 6585, 7102, 7774, 8441, 9243,
+};
+static const int16_t hd_quantize_factor_select_offset_LF[257] = {
+ 0, -22, -21, -21, -20, -20, -19, -19,
+ -18, -18, -17, -17, -16, -16, -15, -14,
+ -14, -13, -13, -12, -12, -11, -11, -10,
+ -10, -9, -9, -8, -7, -7, -6, -6,
+ -5, -5, -4, -4, -3, -3, -2, -1,
+ -1, 0, 0, 1, 1, 2, 2, 3,
+ 4, 4, 5, 5, 6, 6, 7, 8,
+ 8, 9, 9, 10, 11, 11, 12, 12,
+ 13, 14, 14, 15, 15, 16, 17, 17,
+ 18, 19, 19, 20, 20, 21, 22, 22,
+ 23, 24, 24, 25, 26, 26, 27, 28,
+ 28, 29, 30, 30, 31, 32, 33, 33,
+ 34, 35, 35, 36, 37, 38, 38, 39,
+ 40, 41, 41, 42, 43, 44, 44, 45,
+ 46, 47, 48, 48, 49, 50, 51, 52,
+ 52, 53, 54, 55, 56, 57, 58, 58,
+ 59, 60, 61, 62, 63, 64, 65, 66,
+ 67, 68, 69, 69, 70, 71, 72, 73,
+ 74, 75, 77, 78, 79, 80, 81, 82,
+ 83, 84, 85, 86, 87, 89, 90, 91,
+ 92, 93, 94, 96, 97, 98, 99, 101,
+ 102, 103, 105, 106, 107, 109, 110, 112,
+ 113, 115, 116, 118, 119, 121, 122, 124,
+ 125, 127, 129, 130, 132, 134, 136, 137,
+ 139, 141, 143, 145, 147, 149, 151, 153,
+ 155, 158, 160, 162, 164, 167, 169, 172,
+ 174, 177, 180, 182, 185, 188, 191, 194,
+ 197, 201, 204, 208, 211, 215, 219, 223,
+ 227, 232, 236, 241, 246, 251, 257, 263,
+ 269, 275, 283, 290, 298, 307, 317, 327,
+ 339, 352, 367, 384, 404, 429, 458, 494,
+ 522, 522, 522, 522, 522, 522, 522, 522, 522,
+};
+
+
+static const int32_t hd_quantize_intervals_MLF[33] = {
+ -21236, 21236, 63830, 106798, 150386, 194832, 240376, 287258,
+ 335726, 386034, 438460, 493308, 550924, 611696, 676082, 744626,
+ 817986, 896968, 982580, 1076118, 1179278, 1294344, 1424504, 1574386,
+ 1751090, 1966260, 2240868, 2617662, 3196432, 4176450, 5658260, 7671068,
+ 10380372,
+};
+static const int32_t hd_invert_quantize_dither_factors_MLF[33] = {
+ 21236, 21236, 21360, 21608, 21978, 22468, 23076, 23806,
+ 24660, 25648, 26778, 28070, 29544, 31228, 33158, 35386,
+ 37974, 41008, 44606, 48934, 54226, 60840, 69320, 80564,
+ 96140, 119032, 155576, 221218, 357552, 622468, 859344, 1153464, 1555840,
+};
+static const int32_t hd_quantize_dither_factors_MLF[32] = {
+ 0, 31, 62, 93, 123, 152, 183, 214,
+ 247, 283, 323, 369, 421, 483, 557, 647,
+ 759, 900, 1082, 1323, 1654, 2120, 2811, 3894,
+ 5723, 9136, 16411, 34084, 66229, 59219, 73530, 100594,
+};
+static const int16_t hd_quantize_factor_select_offset_MLF[33] = {
+ 0, -21, -16, -12, -7, -2, 3, 8,
+ 13, 19, 24, 30, 36, 43, 50, 57,
+ 65, 74, 83, 93, 104, 117, 131, 147,
+ 166, 189, 219, 259, 322, 427, 521, 521, 521,
+};
+
+
+static const int32_t hd_quantize_intervals_MHF[9] = {
+ -95044, 95044, 295844, 528780, 821332, 1226438, 1890540, 3344850, 6450664,
+};
+static const int32_t hd_invert_quantize_dither_factors_MHF[9] = {
+ 95044, 95044, 105754, 127180, 165372, 39736, 424366, 1029946, 2075866,
+};
+static const int32_t hd_quantize_dither_factors_MHF[8] = {
+ 0, 2678, 5357, 9548, -31409, 96158, 151395, 261480,
+};
+static const int16_t hd_quantize_factor_select_offset_MHF[9] = {
+ 0, -17, 5, 30, 62, 105, 177, 334, 518,
+};
+
+
+static const int32_t hd_quantize_intervals_HF[17] = {
+ -45754, 45754, 138496, 234896, 337336, 448310, 570738, 708380,
+ 866534, 1053262, 1281958, 1577438, 1993050, 2665984, 3900982, 5902844,
+ 8897462,
+};
+static const int32_t hd_invert_quantize_dither_factors_HF[17] = {
+ 45754, 45754, 46988, 49412, 53026, 57950, 64478, 73164,
+ 84988, 101740, 126958, 168522, 247092, 425842, 809154, 1192708, 1801910,
+};
+static const int32_t hd_quantize_dither_factors_HF[16] = {
+ 0, 309, 606, 904, 1231, 1632, 2172, 2956,
+ 4188, 6305, 10391, 19643, 44688, 95828, 95889, 152301,
+};
+static const int16_t hd_quantize_factor_select_offset_HF[17] = {
+ 0, -18, -8, 2, 13, 25, 38, 53,
+ 70, 90, 115, 147, 192, 264, 398, 521, 521,
+};
+
+ConstTables ff_aptx_quant_tables[2][NB_SUBBANDS] = {
+ {
+ [LF] = { quantize_intervals_LF,
+ invert_quantize_dither_factors_LF,
+ quantize_dither_factors_LF,
+ quantize_factor_select_offset_LF,
+ FF_ARRAY_ELEMS(quantize_intervals_LF),
+ 0x11FF, 24 },
+ [MLF] = { quantize_intervals_MLF,
+ invert_quantize_dither_factors_MLF,
+ quantize_dither_factors_MLF,
+ quantize_factor_select_offset_MLF,
+ FF_ARRAY_ELEMS(quantize_intervals_MLF),
+ 0x14FF, 12 },
+ [MHF] = { quantize_intervals_MHF,
+ invert_quantize_dither_factors_MHF,
+ quantize_dither_factors_MHF,
+ quantize_factor_select_offset_MHF,
+ FF_ARRAY_ELEMS(quantize_intervals_MHF),
+ 0x16FF, 6 },
+ [HF] = { quantize_intervals_HF,
+ invert_quantize_dither_factors_HF,
+ quantize_dither_factors_HF,
+ quantize_factor_select_offset_HF,
+ FF_ARRAY_ELEMS(quantize_intervals_HF),
+ 0x15FF, 12 },
+ },
+ {
+ [LF] = { hd_quantize_intervals_LF,
+ hd_invert_quantize_dither_factors_LF,
+ hd_quantize_dither_factors_LF,
+ hd_quantize_factor_select_offset_LF,
+ FF_ARRAY_ELEMS(hd_quantize_intervals_LF),
+ 0x11FF, 24 },
+ [MLF] = { hd_quantize_intervals_MLF,
+ hd_invert_quantize_dither_factors_MLF,
+ hd_quantize_dither_factors_MLF,
+ hd_quantize_factor_select_offset_MLF,
+ FF_ARRAY_ELEMS(hd_quantize_intervals_MLF),
+ 0x14FF, 12 },
+ [MHF] = { hd_quantize_intervals_MHF,
+ hd_invert_quantize_dither_factors_MHF,
+ hd_quantize_dither_factors_MHF,
+ hd_quantize_factor_select_offset_MHF,
+ FF_ARRAY_ELEMS(hd_quantize_intervals_MHF),
+ 0x16FF, 6 },
+ [HF] = { hd_quantize_intervals_HF,
+ hd_invert_quantize_dither_factors_HF,
+ hd_quantize_dither_factors_HF,
+ hd_quantize_factor_select_offset_HF,
+ FF_ARRAY_ELEMS(hd_quantize_intervals_HF),
+ 0x15FF, 12 },
+ }
};
static const int16_t quantization_factors[32] = {
};
-/* Rounded right shift with optionnal clipping */
-#define RSHIFT_SIZE(size) \
-av_always_inline \
-static int##size##_t rshift##size(int##size##_t value, int shift) \
-{ \
- int##size##_t rounding = (int##size##_t)1 << (shift - 1); \
- int##size##_t mask = ((int##size##_t)1 << (shift + 1)) - 1; \
- return ((value + rounding) >> shift) - ((value & mask) == rounding); \
-} \
-av_always_inline \
-static int##size##_t rshift##size##_clip24(int##size##_t value, int shift) \
-{ \
- return av_clip_intp2(rshift##size(value, shift), 23); \
-}
-RSHIFT_SIZE(32)
-RSHIFT_SIZE(64)
-
-
av_always_inline
static void aptx_update_codeword_history(Channel *channel)
{
int32_t cw = ((channel->quantize[0].quantized_sample & 3) << 0) +
((channel->quantize[1].quantized_sample & 2) << 1) +
((channel->quantize[2].quantized_sample & 1) << 3);
- channel->codeword_history = (cw << 8) + (channel->codeword_history << 4);
+ channel->codeword_history = (cw << 8) + ((unsigned)channel->codeword_history << 4);
}
-static void aptx_generate_dither(Channel *channel)
+void ff_aptx_generate_dither(Channel *channel)
{
int subband;
int64_t m;
aptx_update_codeword_history(channel);
m = (int64_t)5184443 * (channel->codeword_history >> 7);
- d = (m << 2) + (m >> 22);
+ d = (m * 4) + (m >> 22);
for (subband = 0; subband < NB_SUBBANDS; subband++)
- channel->dither[subband] = d << (23 - 5*subband);
+ channel->dither[subband] = (unsigned)d << (23 - 5*subband);
channel->dither_parity = (d >> 25) & 1;
}
-/*
- * Convolution filter coefficients for the outer QMF of the QMF tree.
- * The 2 sets are a mirror of each other.
- */
-static const int32_t aptx_qmf_outer_coeffs[NB_FILTERS][FILTER_TAPS] = {
- {
- 730, -413, -9611, 43626, -121026, 269973, -585547, 2801966,
- 697128, -160481, 27611, 8478, -10043, 3511, 688, -897,
- },
- {
- -897, 688, 3511, -10043, 8478, 27611, -160481, 697128,
- 2801966, -585547, 269973, -121026, 43626, -9611, -413, 730,
- },
-};
-
-/*
- * Convolution filter coefficients for the inner QMF of the QMF tree.
- * The 2 sets are a mirror of each other.
- */
-static const int32_t aptx_qmf_inner_coeffs[NB_FILTERS][FILTER_TAPS] = {
- {
- 1033, -584, -13592, 61697, -171156, 381799, -828088, 3962579,
- 985888, -226954, 39048, 11990, -14203, 4966, 973, -1268,
- },
- {
- -1268, 973, 4966, -14203, 11990, 39048, -226954, 985888,
- 3962579, -828088, 381799, -171156, 61697, -13592, -584, 1033,
- },
-};
-
-/*
- * Push one sample into a circular signal buffer.
- */
-av_always_inline
-static void aptx_qmf_filter_signal_push(FilterSignal *signal, int32_t sample)
-{
- signal->buffer[signal->pos ] = sample;
- signal->buffer[signal->pos+FILTER_TAPS] = sample;
- signal->pos = (signal->pos + 1) & (FILTER_TAPS - 1);
-}
-
-/*
- * Compute the convolution of the signal with the coefficients, and reduce
- * to 24 bits by applying the specified right shifting.
- */
-av_always_inline
-static int32_t aptx_qmf_convolution(FilterSignal *signal,
- const int32_t coeffs[FILTER_TAPS],
- int shift)
-{
- int32_t *sig = &signal->buffer[signal->pos];
- int64_t e = 0;
- int i;
-
- for (i = 0; i < FILTER_TAPS; i++)
- e += MUL64(sig[i], coeffs[i]);
-
- return rshift64_clip24(e, shift);
-}
-
-/*
- * Half-band QMF analysis filter realized with a polyphase FIR filter.
- * Split into 2 subbands and downsample by 2.
- * So for each pair of samples that goes in, one sample goes out,
- * split into 2 separate subbands.
- */
-av_always_inline
-static void aptx_qmf_polyphase_analysis(FilterSignal signal[NB_FILTERS],
- const int32_t coeffs[NB_FILTERS][FILTER_TAPS],
- int shift,
- int32_t samples[NB_FILTERS],
- int32_t *low_subband_output,
- int32_t *high_subband_output)
-{
- int32_t subbands[NB_FILTERS];
- int i;
-
- for (i = 0; i < NB_FILTERS; i++) {
- aptx_qmf_filter_signal_push(&signal[i], samples[NB_FILTERS-1-i]);
- subbands[i] = aptx_qmf_convolution(&signal[i], coeffs[i], shift);
- }
-
- *low_subband_output = av_clip_intp2(subbands[0] + subbands[1], 23);
- *high_subband_output = av_clip_intp2(subbands[0] - subbands[1], 23);
-}
-
-/*
- * Two stage QMF analysis tree.
- * Split 4 input samples into 4 subbands and downsample by 4.
- * So for each group of 4 samples that goes in, one sample goes out,
- * split into 4 separate subbands.
- */
-static void aptx_qmf_tree_analysis(QMFAnalysis *qmf,
- int32_t samples[4],
- int32_t subband_samples[4])
-{
- int32_t intermediate_samples[4];
- int i;
-
- /* Split 4 input samples into 2 intermediate subbands downsampled to 2 samples */
- for (i = 0; i < 2; i++)
- aptx_qmf_polyphase_analysis(qmf->outer_filter_signal,
- aptx_qmf_outer_coeffs, 23,
- &samples[2*i],
- &intermediate_samples[0+i],
- &intermediate_samples[2+i]);
-
- /* Split 2 intermediate subband samples into 4 final subbands downsampled to 1 sample */
- for (i = 0; i < 2; i++)
- aptx_qmf_polyphase_analysis(qmf->inner_filter_signal[i],
- aptx_qmf_inner_coeffs, 23,
- &intermediate_samples[2*i],
- &subband_samples[2*i+0],
- &subband_samples[2*i+1]);
-}
-
-/*
- * Half-band QMF synthesis filter realized with a polyphase FIR filter.
- * Join 2 subbands and upsample by 2.
- * So for each 2 subbands sample that goes in, a pair of samples goes out.
- */
-av_always_inline
-static void aptx_qmf_polyphase_synthesis(FilterSignal signal[NB_FILTERS],
- const int32_t coeffs[NB_FILTERS][FILTER_TAPS],
- int shift,
- int32_t low_subband_input,
- int32_t high_subband_input,
- int32_t samples[NB_FILTERS])
-{
- int32_t subbands[NB_FILTERS];
- int i;
-
- subbands[0] = low_subband_input + high_subband_input;
- subbands[1] = low_subband_input - high_subband_input;
-
- for (i = 0; i < NB_FILTERS; i++) {
- aptx_qmf_filter_signal_push(&signal[i], subbands[1-i]);
- samples[i] = aptx_qmf_convolution(&signal[i], coeffs[i], shift);
- }
-}
-
-/*
- * Two stage QMF synthesis tree.
- * Join 4 subbands and upsample by 4.
- * So for each 4 subbands sample that goes in, a group of 4 samples goes out.
- */
-static void aptx_qmf_tree_synthesis(QMFAnalysis *qmf,
- int32_t subband_samples[4],
- int32_t samples[4])
-{
- int32_t intermediate_samples[4];
- int i;
-
- /* Join 4 subbands into 2 intermediate subbands upsampled to 2 samples. */
- for (i = 0; i < 2; i++)
- aptx_qmf_polyphase_synthesis(qmf->inner_filter_signal[i],
- aptx_qmf_inner_coeffs, 22,
- subband_samples[2*i+0],
- subband_samples[2*i+1],
- &intermediate_samples[2*i]);
-
- /* Join 2 samples from intermediate subbands upsampled to 4 samples. */
- for (i = 0; i < 2; i++)
- aptx_qmf_polyphase_synthesis(qmf->outer_filter_signal,
- aptx_qmf_outer_coeffs, 21,
- intermediate_samples[0+i],
- intermediate_samples[2+i],
- &samples[2*i]);
-}
-
-
-av_always_inline
-static int32_t aptx_bin_search(int32_t value, int32_t factor,
- const int32_t *intervals, int32_t nb_intervals)
-{
- int32_t idx = 0;
- int i;
-
- for (i = nb_intervals >> 1; i > 0; i >>= 1)
- if (MUL64(factor, intervals[idx + i]) <= ((int64_t)value << 24))
- idx += i;
-
- return idx;
-}
-
-static void aptx_quantize_difference(Quantize *quantize,
- int32_t sample_difference,
- int32_t dither,
- int32_t quantization_factor,
- ConstTables *tables)
-{
- const int32_t *intervals = tables->quantize_intervals;
- int32_t quantized_sample, dithered_sample, parity_change;
- int32_t d, mean, interval, inv;
- int64_t error;
-
- quantized_sample = aptx_bin_search(FFABS(sample_difference) >> 4,
- quantization_factor,
- intervals, tables->tables_size);
-
- d = rshift32_clip24(MULH(dither, dither), 7) - (1 << 23);
- d = rshift64(MUL64(d, tables->quantize_dither_factors[quantized_sample]), 23);
-
- intervals += quantized_sample;
- mean = (intervals[1] + intervals[0]) / 2;
- interval = (intervals[1] - intervals[0]) * (-(sample_difference < 0) | 1);
-
- dithered_sample = rshift64_clip24(MUL64(dither, interval) + ((int64_t)(mean + d) << 32), 32);
- error = ((int64_t)FFABS(sample_difference) << 20) - MUL64(dithered_sample, quantization_factor);
- quantize->error = FFABS(rshift64(error, 23));
-
- parity_change = quantized_sample;
- if (error < 0)
- quantized_sample--;
- else
- parity_change--;
-
- inv = -(sample_difference < 0);
- quantize->quantized_sample = quantized_sample ^ inv;
- quantize->quantized_sample_parity_change = parity_change ^ inv;
-}
-
-static void aptx_encode_channel(Channel *channel, int32_t samples[4])
-{
- int32_t subband_samples[4];
- int subband;
- aptx_qmf_tree_analysis(&channel->qmf, samples, subband_samples);
- aptx_generate_dither(channel);
- for (subband = 0; subband < NB_SUBBANDS; subband++) {
- int32_t diff = av_clip_intp2(subband_samples[subband] - channel->prediction[subband].predicted_sample, 23);
- aptx_quantize_difference(&channel->quantize[subband], diff,
- channel->dither[subband],
- channel->invert_quantize[subband].quantization_factor,
- &tables[subband]);
- }
-}
-
-static void aptx_decode_channel(Channel *channel, int32_t samples[4])
-{
- int32_t subband_samples[4];
- int subband;
- for (subband = 0; subband < NB_SUBBANDS; subband++)
- subband_samples[subband] = channel->prediction[subband].previous_reconstructed_sample;
- aptx_qmf_tree_synthesis(&channel->qmf, subband_samples, samples);
-}
-
-
static void aptx_invert_quantization(InvertQuantize *invert_quantize,
int32_t quantized_sample, int32_t dither,
ConstTables *tables)
if (quantized_sample < 0)
qr = -qr;
- qr = rshift64_clip24(((int64_t)qr<<32) + MUL64(dither, tables->invert_quantize_dither_factors[idx]), 32);
+ qr = rshift64_clip24((qr * (1LL<<32)) + MUL64(dither, tables->invert_quantize_dither_factors[idx]), 32);
invert_quantize->reconstructed_difference = MUL64(invert_quantize->quantization_factor, qr) >> 19;
- shift = 24 - tables->quantized_bits;
-
/* update factor_select */
factor_select = 32620 * invert_quantize->factor_select;
- factor_select = rshift32(factor_select + (tables->quantize_factor_select_offset[idx] << 15), 15);
- invert_quantize->factor_select = av_clip(factor_select, 0, (shift << 8) | 0xFF);
+ factor_select = rshift32(factor_select + (tables->quantize_factor_select_offset[idx] * (1 << 15)), 15);
+ invert_quantize->factor_select = av_clip(factor_select, 0, tables->factor_max);
/* update quantization factor */
idx = (invert_quantize->factor_select & 0xFF) >> 3;
- shift -= invert_quantize->factor_select >> 8;
+ shift = (tables->factor_max - invert_quantize->factor_select) >> 8;
invert_quantize->quantization_factor = (quantization_factors[idx] << 11) >> shift;
}
prediction->previous_reconstructed_sample = reconstructed_sample;
reconstructed_differences = aptx_reconstructed_differences_update(prediction, reconstructed_difference, order);
- srd0 = FFDIFFSIGN(reconstructed_difference, 0) << 23;
+ srd0 = FFDIFFSIGN(reconstructed_difference, 0) * (1 << 23);
for (i = 0; i < order; i++) {
int32_t srd = FF_SIGNBIT(reconstructed_differences[-i-1]) | 1;
prediction->d_weight[i] -= rshift32(prediction->d_weight[i] - srd*srd0, 8);
range = 0x100000;
sw1 = rshift32(-same_sign[1] * prediction->s_weight[1], 1);
- sw1 = (av_clip(sw1, -range, range) & ~0xF) << 4;
+ sw1 = (av_clip(sw1, -range, range) & ~0xF) * 16;
range = 0x300000;
weight[0] = 254 * prediction->s_weight[0] + 0x800000*same_sign[0] + sw1;
tables->prediction_order);
}
-static void aptx_invert_quantize_and_prediction(Channel *channel)
+void ff_aptx_invert_quantize_and_prediction(Channel *channel, int hd)
{
int subband;
for (subband = 0; subband < NB_SUBBANDS; subband++)
&channel->prediction[subband],
channel->quantize[subband].quantized_sample,
channel->dither[subband],
- &tables[subband]);
+ &ff_aptx_quant_tables[hd][subband]);
}
-static int32_t aptx_quantized_parity(Channel *channel)
-{
- int32_t parity = channel->dither_parity;
- int subband;
-
- for (subband = 0; subband < NB_SUBBANDS; subband++)
- parity ^= channel->quantize[subband].quantized_sample;
-
- return parity & 1;
-}
-
-/* For each sample, ensure that the parity of all subbands of all channels
- * is 0 except once every 8 samples where the parity is forced to 1. */
-static int aptx_check_parity(Channel channels[NB_CHANNELS], int32_t *idx)
-{
- int32_t parity = aptx_quantized_parity(&channels[LEFT])
- ^ aptx_quantized_parity(&channels[RIGHT]);
-
- int eighth = *idx == 7;
- *idx = (*idx + 1) & 7;
-
- return parity ^ eighth;
-}
-
-static void aptx_insert_sync(Channel channels[NB_CHANNELS], int32_t *idx)
-{
- if (aptx_check_parity(channels, idx)) {
- int i;
- Channel *c;
- static const int map[] = { 1, 2, 0, 3 };
- Quantize *min = &channels[NB_CHANNELS-1].quantize[map[0]];
- for (c = &channels[NB_CHANNELS-1]; c >= channels; c--)
- for (i = 0; i < NB_SUBBANDS; i++)
- if (c->quantize[map[i]].error < min->error)
- min = &c->quantize[map[i]];
-
- /* Forcing the desired parity is done by offsetting by 1 the quantized
- * sample from the subband featuring the smallest quantization error. */
- min->quantized_sample = min->quantized_sample_parity_change;
- }
-}
-
-static uint16_t aptx_pack_codeword(Channel *channel)
-{
- int32_t parity = aptx_quantized_parity(channel);
- return (((channel->quantize[3].quantized_sample & 0x06) | parity) << 13)
- | (((channel->quantize[2].quantized_sample & 0x03) ) << 11)
- | (((channel->quantize[1].quantized_sample & 0x0F) ) << 7)
- | (((channel->quantize[0].quantized_sample & 0x7F) ) << 0);
-}
-
-static void aptx_unpack_codeword(Channel *channel, uint16_t codeword)
-{
- channel->quantize[0].quantized_sample = sign_extend(codeword >> 0, 7);
- channel->quantize[1].quantized_sample = sign_extend(codeword >> 7, 4);
- channel->quantize[2].quantized_sample = sign_extend(codeword >> 11, 2);
- channel->quantize[3].quantized_sample = sign_extend(codeword >> 13, 3);
- channel->quantize[3].quantized_sample = (channel->quantize[3].quantized_sample & ~1)
- | aptx_quantized_parity(channel);
-}
-
-static void aptx_encode_samples(AptXContext *ctx,
- int32_t samples[NB_CHANNELS][4],
- uint8_t output[2*NB_CHANNELS])
-{
- int channel;
- for (channel = 0; channel < NB_CHANNELS; channel++)
- aptx_encode_channel(&ctx->channels[channel], samples[channel]);
-
- aptx_insert_sync(ctx->channels, &ctx->sync_idx);
-
- for (channel = 0; channel < NB_CHANNELS; channel++) {
- aptx_invert_quantize_and_prediction(&ctx->channels[channel]);
- AV_WB16(output + 2*channel, aptx_pack_codeword(&ctx->channels[channel]));
- }
-}
-
-static int aptx_decode_samples(AptXContext *ctx,
- const uint8_t input[2*NB_CHANNELS],
- int32_t samples[NB_CHANNELS][4])
-{
- int channel, ret;
-
- for (channel = 0; channel < NB_CHANNELS; channel++) {
- uint16_t codeword;
- aptx_generate_dither(&ctx->channels[channel]);
-
- codeword = AV_RB16(input + 2*channel);
- aptx_unpack_codeword(&ctx->channels[channel], codeword);
- aptx_invert_quantize_and_prediction(&ctx->channels[channel]);
- }
-
- ret = aptx_check_parity(ctx->channels, &ctx->sync_idx);
-
- for (channel = 0; channel < NB_CHANNELS; channel++)
- aptx_decode_channel(&ctx->channels[channel], samples[channel]);
-
- return ret;
-}
-
-
-static av_cold int aptx_init(AVCodecContext *avctx)
+av_cold int ff_aptx_init(AVCodecContext *avctx)
{
AptXContext *s = avctx->priv_data;
int chan, subband;
+ if (avctx->channels != 2)
+ return AVERROR_INVALIDDATA;
+
+ s->hd = avctx->codec->id == AV_CODEC_ID_APTX_HD;
+ s->block_size = s->hd ? 6 : 4;
+
if (avctx->frame_size == 0)
- avctx->frame_size = 1024;
+ avctx->frame_size = 256 * s->block_size;
- if (avctx->frame_size & 3) {
- av_log(avctx, AV_LOG_ERROR, "Frame size must be a multiple of 4 samples\n");
+ if (avctx->frame_size % s->block_size) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Frame size must be a multiple of %d samples\n", s->block_size);
return AVERROR(EINVAL);
}
ff_af_queue_init(avctx, &s->afq);
return 0;
}
-
-static int aptx_decode_frame(AVCodecContext *avctx, void *data,
- int *got_frame_ptr, AVPacket *avpkt)
-{
- AptXContext *s = avctx->priv_data;
- AVFrame *frame = data;
- int pos, channel, sample, ret;
-
- if (avpkt->size < 4) {
- av_log(avctx, AV_LOG_ERROR, "Packet is too small\n");
- return AVERROR_INVALIDDATA;
- }
-
- /* get output buffer */
- frame->channels = NB_CHANNELS;
- frame->format = AV_SAMPLE_FMT_S32P;
- frame->nb_samples = avpkt->size & ~3;
- if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
- return ret;
-
- for (pos = 0; pos < frame->nb_samples; pos += 4) {
- int32_t samples[NB_CHANNELS][4];
-
- if (aptx_decode_samples(s, &avpkt->data[pos], samples)) {
- av_log(avctx, AV_LOG_ERROR, "Synchronization error\n");
- return AVERROR_INVALIDDATA;
- }
-
- for (channel = 0; channel < NB_CHANNELS; channel++)
- for (sample = 0; sample < 4; sample++)
- AV_WN32A(&frame->data[channel][4*(sample+pos)],
- samples[channel][sample] << 8);
- }
-
- *got_frame_ptr = 1;
- return frame->nb_samples;
-}
-
-static int aptx_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
- const AVFrame *frame, int *got_packet_ptr)
-{
- AptXContext *s = avctx->priv_data;
- int pos, channel, sample, ret;
-
- if ((ret = ff_af_queue_add(&s->afq, frame)) < 0)
- return ret;
-
- if ((ret = ff_alloc_packet2(avctx, avpkt, frame->nb_samples, 0)) < 0)
- return ret;
-
- for (pos = 0; pos < frame->nb_samples; pos += 4) {
- int32_t samples[NB_CHANNELS][4];
-
- for (channel = 0; channel < NB_CHANNELS; channel++)
- for (sample = 0; sample < 4; sample++)
- samples[channel][sample] = (int32_t)AV_RN32A(&frame->data[channel][4*(sample+pos)]) >> 8;
-
- aptx_encode_samples(s, samples, avpkt->data + pos);
- }
-
- ff_af_queue_remove(&s->afq, frame->nb_samples, &avpkt->pts, &avpkt->duration);
- *got_packet_ptr = 1;
- return 0;
-}
-
-static av_cold int aptx_close(AVCodecContext *avctx)
-{
- AptXContext *s = avctx->priv_data;
- ff_af_queue_close(&s->afq);
- return 0;
-}
-
-
-#if CONFIG_APTX_DECODER
-AVCodec ff_aptx_decoder = {
- .name = "aptx",
- .long_name = NULL_IF_CONFIG_SMALL("aptX (Audio Processing Technology for Bluetooth)"),
- .type = AVMEDIA_TYPE_AUDIO,
- .id = AV_CODEC_ID_APTX,
- .priv_data_size = sizeof(AptXContext),
- .init = aptx_init,
- .decode = aptx_decode_frame,
- .close = aptx_close,
- .capabilities = AV_CODEC_CAP_DR1,
- .channel_layouts = (const uint64_t[]) { AV_CH_LAYOUT_STEREO, 0},
- .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S32P,
- AV_SAMPLE_FMT_NONE },
-};
-#endif
-
-#if CONFIG_APTX_ENCODER
-AVCodec ff_aptx_encoder = {
- .name = "aptx",
- .long_name = NULL_IF_CONFIG_SMALL("aptX (Audio Processing Technology for Bluetooth)"),
- .type = AVMEDIA_TYPE_AUDIO,
- .id = AV_CODEC_ID_APTX,
- .priv_data_size = sizeof(AptXContext),
- .init = aptx_init,
- .encode2 = aptx_encode_frame,
- .close = aptx_close,
- .channel_layouts = (const uint64_t[]) { AV_CH_LAYOUT_STEREO, 0},
- .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S32P,
- AV_SAMPLE_FMT_NONE },
- .supported_samplerates = (const int[]) {8000, 16000, 24000, 32000, 44100, 48000, 0},
-};
-#endif
projects / ffmpeg / blobdiff