author | llornkcor <llornkcor> | 2005-11-08 23:16:03 (UTC) |
---|---|---|
committer | llornkcor <llornkcor> | 2005-11-08 23:16:03 (UTC) |
commit | 6bd52d3658f01c966d690b12235592a5473a4d57 (patch) (side-by-side diff) | |
tree | 76e25003b738fde6ebbea5d338b7cf76b82f47fa /core/multimedia/opieplayer/libmad/layer3.c | |
parent | a8063e0797d6edf2ead22fc8c5346ddf187f0b5d (diff) | |
download | opie-6bd52d3658f01c966d690b12235592a5473a4d57.zip opie-6bd52d3658f01c966d690b12235592a5473a4d57.tar.gz opie-6bd52d3658f01c966d690b12235592a5473a4d57.tar.bz2 |
update libmad and add 64bit define
Diffstat (limited to 'core/multimedia/opieplayer/libmad/layer3.c') (more/less context) (ignore whitespace changes)
-rw-r--r-- | core/multimedia/opieplayer/libmad/layer3.c | 232 |
1 files changed, 214 insertions, 18 deletions
diff --git a/core/multimedia/opieplayer/libmad/layer3.c b/core/multimedia/opieplayer/libmad/layer3.c index 03f13fe..3c5dd9e 100644 --- a/core/multimedia/opieplayer/libmad/layer3.c +++ b/core/multimedia/opieplayer/libmad/layer3.c @@ -1,6 +1,6 @@ /* * libmad - MPEG audio decoder library - * Copyright (C) 2000-2001 Robert Leslie + * Copyright (C) 2000-2004 Underbit Technologies, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -288,8 +288,8 @@ unsigned char const sfb_8000_short[] = { # define sfb_12000_mixed sfb_16000_mixed # define sfb_11025_mixed sfb_12000_mixed -/* the 8000 Hz short block scalefactor bands do not break after the first 36 - frequency lines, so this is probably wrong */ +/* the 8000 Hz short block scalefactor bands do not break after + the first 36 frequency lines, so this is probably wrong */ static unsigned char const sfb_8000_mixed[] = { /* long */ 12, 12, 12, @@ -382,7 +382,7 @@ mad_fixed_t const ca[8] = { * IMDCT coefficients for short blocks * derived from section 2.4.3.4.10.2 of ISO/IEC 11172-3 * - * imdct_s[i/even][k] = cos((PI / 24) * (2 * (i / 2) + 7) * (2 * k + 1)) + * imdct_s[i/even][k] = cos((PI / 24) * (2 * (i / 2) + 7) * (2 * k + 1)) * imdct_s[i /odd][k] = cos((PI / 24) * (2 * (6 + (i-1)/2) + 7) * (2 * k + 1)) */ static @@ -461,7 +461,7 @@ mad_fixed_t const is_table[7] = { * derived from section 2.4.3.2 of ISO/IEC 13818-3 * * is_lsf_table[0][i] = (1 / sqrt(sqrt(2)))^(i + 1) - * is_lsf_table[1][i] = (1 / sqrt(2))^(i + 1) + * is_lsf_table[1][i] = (1 / sqrt(2)) ^(i + 1) */ static mad_fixed_t const is_lsf_table[2][15] = { @@ -1575,6 +1575,193 @@ void III_aliasreduce(mad_fixed_t xr[576], int lines) # if defined(ASO_IMDCT) void III_imdct_l(mad_fixed_t const [18], mad_fixed_t [36], unsigned int); # else +# if 1 +static +void fastsdct(mad_fixed_t const x[9], mad_fixed_t y[18]) +{ + mad_fixed_t a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12; + mad_fixed_t a13, a14, a15, a16, a17, a18, a19, a20, a21, a22, a23, a24, a25; + mad_fixed_t m0, m1, m2, m3, m4, m5, m6, m7; + + enum { + c0 = MAD_F(0x1f838b8d), /* 2 * cos( 1 * PI / 18) */ + c1 = MAD_F(0x1bb67ae8), /* 2 * cos( 3 * PI / 18) */ + c2 = MAD_F(0x18836fa3), /* 2 * cos( 4 * PI / 18) */ + c3 = MAD_F(0x1491b752), /* 2 * cos( 5 * PI / 18) */ + c4 = MAD_F(0x0af1d43a), /* 2 * cos( 7 * PI / 18) */ + c5 = MAD_F(0x058e86a0), /* 2 * cos( 8 * PI / 18) */ + c6 = -MAD_F(0x1e11f642) /* 2 * cos(16 * PI / 18) */ + }; + + a0 = x[3] + x[5]; + a1 = x[3] - x[5]; + a2 = x[6] + x[2]; + a3 = x[6] - x[2]; + a4 = x[1] + x[7]; + a5 = x[1] - x[7]; + a6 = x[8] + x[0]; + a7 = x[8] - x[0]; + + a8 = a0 + a2; + a9 = a0 - a2; + a10 = a0 - a6; + a11 = a2 - a6; + a12 = a8 + a6; + a13 = a1 - a3; + a14 = a13 + a7; + a15 = a3 + a7; + a16 = a1 - a7; + a17 = a1 + a3; + + m0 = mad_f_mul(a17, -c3); + m1 = mad_f_mul(a16, -c0); + m2 = mad_f_mul(a15, -c4); + m3 = mad_f_mul(a14, -c1); + m4 = mad_f_mul(a5, -c1); + m5 = mad_f_mul(a11, -c6); + m6 = mad_f_mul(a10, -c5); + m7 = mad_f_mul(a9, -c2); + + a18 = x[4] + a4; + a19 = 2 * x[4] - a4; + a20 = a19 + m5; + a21 = a19 - m5; + a22 = a19 + m6; + a23 = m4 + m2; + a24 = m4 - m2; + a25 = m4 + m1; + + /* output to every other slot for convenience */ + + y[ 0] = a18 + a12; + y[ 2] = m0 - a25; + y[ 4] = m7 - a20; + y[ 6] = m3; + y[ 8] = a21 - m6; + y[10] = a24 - m1; + y[12] = a12 - 2 * a18; + y[14] = a23 + m0; + y[16] = a22 + m7; +} + +static inline +void sdctII(mad_fixed_t const x[18], mad_fixed_t X[18]) +{ + mad_fixed_t tmp[9]; + int i; + + /* scale[i] = 2 * cos(PI * (2 * i + 1) / (2 * 18)) */ + static mad_fixed_t const scale[9] = { + MAD_F(0x1fe0d3b4), MAD_F(0x1ee8dd47), MAD_F(0x1d007930), + MAD_F(0x1a367e59), MAD_F(0x16a09e66), MAD_F(0x125abcf8), + MAD_F(0x0d8616bc), MAD_F(0x08483ee1), MAD_F(0x02c9fad7) + }; + + /* divide the 18-point SDCT-II into two 9-point SDCT-IIs */ + + /* even input butterfly */ + + for (i = 0; i < 9; i += 3) { + tmp[i + 0] = x[i + 0] + x[18 - (i + 0) - 1]; + tmp[i + 1] = x[i + 1] + x[18 - (i + 1) - 1]; + tmp[i + 2] = x[i + 2] + x[18 - (i + 2) - 1]; + } + + fastsdct(tmp, &X[0]); + + /* odd input butterfly and scaling */ + + for (i = 0; i < 9; i += 3) { + tmp[i + 0] = mad_f_mul(x[i + 0] - x[18 - (i + 0) - 1], scale[i + 0]); + tmp[i + 1] = mad_f_mul(x[i + 1] - x[18 - (i + 1) - 1], scale[i + 1]); + tmp[i + 2] = mad_f_mul(x[i + 2] - x[18 - (i + 2) - 1], scale[i + 2]); + } + + fastsdct(tmp, &X[1]); + + /* output accumulation */ + + for (i = 3; i < 18; i += 8) { + X[i + 0] -= X[(i + 0) - 2]; + X[i + 2] -= X[(i + 2) - 2]; + X[i + 4] -= X[(i + 4) - 2]; + X[i + 6] -= X[(i + 6) - 2]; + } +} + +static inline +void dctIV(mad_fixed_t const y[18], mad_fixed_t X[18]) +{ + mad_fixed_t tmp[18]; + int i; + + /* scale[i] = 2 * cos(PI * (2 * i + 1) / (4 * 18)) */ + static mad_fixed_t const scale[18] = { + MAD_F(0x1ff833fa), MAD_F(0x1fb9ea93), MAD_F(0x1f3dd120), + MAD_F(0x1e84d969), MAD_F(0x1d906bcf), MAD_F(0x1c62648b), + MAD_F(0x1afd100f), MAD_F(0x1963268b), MAD_F(0x1797c6a4), + MAD_F(0x159e6f5b), MAD_F(0x137af940), MAD_F(0x11318ef3), + MAD_F(0x0ec6a507), MAD_F(0x0c3ef153), MAD_F(0x099f61c5), + MAD_F(0x06ed12c5), MAD_F(0x042d4544), MAD_F(0x0165547c) + }; + + /* scaling */ + + for (i = 0; i < 18; i += 3) { + tmp[i + 0] = mad_f_mul(y[i + 0], scale[i + 0]); + tmp[i + 1] = mad_f_mul(y[i + 1], scale[i + 1]); + tmp[i + 2] = mad_f_mul(y[i + 2], scale[i + 2]); + } + + /* SDCT-II */ + + sdctII(tmp, X); + + /* scale reduction and output accumulation */ + + X[0] /= 2; + for (i = 1; i < 17; i += 4) { + X[i + 0] = X[i + 0] / 2 - X[(i + 0) - 1]; + X[i + 1] = X[i + 1] / 2 - X[(i + 1) - 1]; + X[i + 2] = X[i + 2] / 2 - X[(i + 2) - 1]; + X[i + 3] = X[i + 3] / 2 - X[(i + 3) - 1]; + } + X[17] = X[17] / 2 - X[16]; +} + +/* + * NAME: imdct36 + * DESCRIPTION: perform X[18]->x[36] IMDCT using Szu-Wei Lee's fast algorithm + */ +static inline +void imdct36(mad_fixed_t const x[18], mad_fixed_t y[36]) +{ + mad_fixed_t tmp[18]; + int i; + + /* DCT-IV */ + + dctIV(x, tmp); + + /* convert 18-point DCT-IV to 36-point IMDCT */ + + for (i = 0; i < 9; i += 3) { + y[i + 0] = tmp[9 + (i + 0)]; + y[i + 1] = tmp[9 + (i + 1)]; + y[i + 2] = tmp[9 + (i + 2)]; + } + for (i = 9; i < 27; i += 3) { + y[i + 0] = -tmp[36 - (9 + (i + 0)) - 1]; + y[i + 1] = -tmp[36 - (9 + (i + 1)) - 1]; + y[i + 2] = -tmp[36 - (9 + (i + 2)) - 1]; + } + for (i = 27; i < 36; i += 3) { + y[i + 0] = -tmp[(i + 0) - 27]; + y[i + 1] = -tmp[(i + 1) - 27]; + y[i + 2] = -tmp[(i + 2) - 27]; + } +} +# else /* * NAME: imdct36 * DESCRIPTION: perform X[18]->x[36] IMDCT @@ -1865,6 +2052,7 @@ void imdct36(mad_fixed_t const X[18], mad_fixed_t x[36]) x[26] = x[27] = MAD_F_MLZ(hi, lo) + t5; } +# endif /* * NAME: III_imdct_l() @@ -1929,7 +2117,11 @@ void III_imdct_l(mad_fixed_t const X[18], mad_fixed_t z[36], break; case 1: /* start block */ - for (i = 0; i < 18; ++i) z[i] = mad_f_mul(z[i], window_l[i]); + for (i = 0; i < 18; i += 3) { + z[i + 0] = mad_f_mul(z[i + 0], window_l[i + 0]); + z[i + 1] = mad_f_mul(z[i + 1], window_l[i + 1]); + z[i + 2] = mad_f_mul(z[i + 2], window_l[i + 2]); + } /* (i = 18; i < 24; ++i) z[i] unchanged */ for (i = 24; i < 30; ++i) z[i] = mad_f_mul(z[i], window_s[i - 18]); for (i = 30; i < 36; ++i) z[i] = 0; @@ -1939,7 +2131,11 @@ void III_imdct_l(mad_fixed_t const X[18], mad_fixed_t z[36], for (i = 0; i < 6; ++i) z[i] = 0; for (i = 6; i < 12; ++i) z[i] = mad_f_mul(z[i], window_s[i - 6]); /* (i = 12; i < 18; ++i) z[i] unchanged */ - for (i = 18; i < 36; ++i) z[i] = mad_f_mul(z[i], window_l[i]); + for (i = 18; i < 36; i += 3) { + z[i + 0] = mad_f_mul(z[i + 0], window_l[i + 0]); + z[i + 1] = mad_f_mul(z[i + 1], window_l[i + 1]); + z[i + 2] = mad_f_mul(z[i + 2], window_l[i + 2]); + } break; } } @@ -2042,31 +2238,31 @@ void III_overlap(mad_fixed_t const output[36], mad_fixed_t overlap[18], tmp2 = overlap[1]; for (i = 0; i < 16; i += 2) { - sample[i + 0][sb] = output[i + 0] + tmp1; + sample[i + 0][sb] = output[i + 0 + 0] + tmp1; overlap[i + 0] = output[i + 0 + 18]; tmp1 = overlap[i + 2]; - sample[i + 1][sb] = output[i + 1] + tmp2; + sample[i + 1][sb] = output[i + 1 + 0] + tmp2; overlap[i + 1] = output[i + 1 + 18]; tmp2 = overlap[i + 3]; } - sample[16][sb] = output[16] + tmp1; + sample[16][sb] = output[16 + 0] + tmp1; overlap[16] = output[16 + 18]; - sample[17][sb] = output[17] + tmp2; + sample[17][sb] = output[17 + 0] + tmp2; overlap[17] = output[17 + 18]; } # elif 0 for (i = 0; i < 18; i += 2) { - sample[i + 0][sb] = output[i + 0] + overlap[i + 0]; + sample[i + 0][sb] = output[i + 0 + 0] + overlap[i + 0]; overlap[i + 0] = output[i + 0 + 18]; - sample[i + 1][sb] = output[i + 1] + overlap[i + 1]; + sample[i + 1][sb] = output[i + 1 + 0] + overlap[i + 1]; overlap[i + 1] = output[i + 1 + 18]; } # else for (i = 0; i < 18; ++i) { - sample[i][sb] = output[i] + overlap[i]; + sample[i][sb] = output[i + 0] + overlap[i]; overlap[i] = output[i + 18]; } # endif @@ -2454,12 +2650,12 @@ int mad_layer_III(struct mad_stream *stream, struct mad_frame *frame) stream->error = error; result = -1; } - } - /* designate ancillary bits */ + /* designate ancillary bits */ - stream->anc_ptr = ptr; - stream->anc_bitlen = md_len * CHAR_BIT - data_bitlen; + stream->anc_ptr = ptr; + stream->anc_bitlen = md_len * CHAR_BIT - data_bitlen; + } # if 0 && defined(DEBUG) fprintf(stderr, |