diff options
author | Vitor Sessak <vitor1001@gmail.com> | 2012-01-05 00:32:47 +0400 |
---|---|---|
committer | Ronald S. Bultje <rsbultje@gmail.com> | 2012-01-09 05:37:07 +0400 |
commit | 6dfcf53092aba9f1ef31629e11515df5752327db (patch) | |
tree | b9d477003112438e6bfd920ce3e4d924aab6fed1 /libavcodec/mpegaudiodec.c | |
parent | 421c99a4a7c116fc2d4e7a6c866c2209852ef581 (diff) |
mpegaudiodec: move imdct and windowing function to mpegaudiodsp
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
Diffstat (limited to 'libavcodec/mpegaudiodec.c')
-rw-r--r-- | libavcodec/mpegaudiodec.c | 193 |
1 files changed, 15 insertions, 178 deletions
diff --git a/libavcodec/mpegaudiodec.c b/libavcodec/mpegaudiodec.c index 702476b7ec..70c5f76381 100644 --- a/libavcodec/mpegaudiodec.c +++ b/libavcodec/mpegaudiodec.c @@ -130,7 +130,6 @@ static uint16_t band_index_long[9][23]; static INTFLOAT is_table[2][16]; static INTFLOAT is_table_lsf[2][2][16]; static INTFLOAT csa_table[8][4]; -static INTFLOAT mdct_win[8][36]; static int16_t division_tab3[1<<6 ]; static int16_t division_tab5[1<<8 ]; @@ -417,43 +416,6 @@ static av_cold void decode_init_static(void) csa_table[i][3] = ca - cs; #endif } - - /* compute mdct windows */ - for (i = 0; i < 36; i++) { - for (j = 0; j < 4; j++) { - double d; - - if (j == 2 && i % 3 != 1) - continue; - - d = sin(M_PI * (i + 0.5) / 36.0); - if (j == 1) { - if (i >= 30) d = 0; - else if (i >= 24) d = sin(M_PI * (i - 18 + 0.5) / 12.0); - else if (i >= 18) d = 1; - } else if (j == 3) { - if (i < 6) d = 0; - else if (i < 12) d = sin(M_PI * (i - 6 + 0.5) / 12.0); - else if (i < 18) d = 1; - } - //merge last stage of imdct into the window coefficients - d *= 0.5 / cos(M_PI * (2 * i + 19) / 72); - - if (j == 2) - mdct_win[j][i/3] = FIXHR((d / (1<<5))); - else - mdct_win[j][i ] = FIXHR((d / (1<<5))); - } - } - - /* NOTE: we do frequency inversion adter the MDCT by changing - the sign of the right window coefs */ - for (j = 0; j < 4; j++) { - for (i = 0; i < 36; i += 2) { - mdct_win[j + 4][i ] = mdct_win[j][i ]; - mdct_win[j + 4][i + 1] = -mdct_win[j][i + 1]; - } - } } static av_cold int decode_init(AVCodecContext * avctx) @@ -483,32 +445,9 @@ static av_cold int decode_init(AVCodecContext * avctx) } #define C3 FIXHR(0.86602540378443864676/2) - -/* 0.5 / cos(pi*(2*i+1)/36) */ -static const INTFLOAT icos36[9] = { - FIXR(0.50190991877167369479), - FIXR(0.51763809020504152469), //0 - FIXR(0.55168895948124587824), - FIXR(0.61038729438072803416), - FIXR(0.70710678118654752439), //1 - FIXR(0.87172339781054900991), - FIXR(1.18310079157624925896), - FIXR(1.93185165257813657349), //2 - FIXR(5.73685662283492756461), -}; - -/* 0.5 / cos(pi*(2*i+1)/36) */ -static const INTFLOAT icos36h[9] = { - FIXHR(0.50190991877167369479/2), - FIXHR(0.51763809020504152469/2), //0 - FIXHR(0.55168895948124587824/2), - FIXHR(0.61038729438072803416/2), - FIXHR(0.70710678118654752439/2), //1 - FIXHR(0.87172339781054900991/2), - FIXHR(1.18310079157624925896/4), - FIXHR(1.93185165257813657349/4), //2 -// FIXHR(5.73685662283492756461), -}; +#define C4 FIXHR(0.70710678118654752439/2) //0.5 / cos(pi*(9)/36) +#define C5 FIXHR(0.51763809020504152469/2) //0.5 / cos(pi*(5)/36) +#define C6 FIXHR(1.93185165257813657349/4) //0.5 / cos(pi*(15)/36) /* 12 points IMDCT. We compute it "by hand" by factorizing obvious cases. */ @@ -529,7 +468,7 @@ static void imdct12(INTFLOAT *out, INTFLOAT *in) in3 = MULH3(in3, C3, 4); t1 = in0 - in4; - t2 = MULH3(in1 - in5, icos36h[4], 2); + t2 = MULH3(in1 - in5, C4, 2); out[ 7] = out[10] = t1 + t2; @@ -539,112 +478,20 @@ static void imdct12(INTFLOAT *out, INTFLOAT *in) in0 += SHR(in4, 1); in4 = in0 + in2; in5 += 2*in1; - in1 = MULH3(in5 + in3, icos36h[1], 1); + in1 = MULH3(in5 + in3, C5, 1); out[ 8] = out[ 9] = in4 + in1; out[ 2] = out[ 3] = in4 - in1; in0 -= in2; - in5 = MULH3(in5 - in3, icos36h[7], 2); + in5 = MULH3(in5 - in3, C6, 2); out[ 0] = out[ 5] = in0 - in5; out[ 6] = out[11] = in0 + in5; } -/* cos(pi*i/18) */ -#define C1 FIXHR(0.98480775301220805936/2) -#define C2 FIXHR(0.93969262078590838405/2) -#define C3 FIXHR(0.86602540378443864676/2) -#define C4 FIXHR(0.76604444311897803520/2) -#define C5 FIXHR(0.64278760968653932632/2) -#define C6 FIXHR(0.5/2) -#define C7 FIXHR(0.34202014332566873304/2) -#define C8 FIXHR(0.17364817766693034885/2) - - -/* using Lee like decomposition followed by hand coded 9 points DCT */ -static void imdct36(INTFLOAT *out, INTFLOAT *buf, INTFLOAT *in, INTFLOAT *win) -{ - int i, j; - INTFLOAT t0, t1, t2, t3, s0, s1, s2, s3; - INTFLOAT tmp[18], *tmp1, *in1; - - for (i = 17; i >= 1; i--) - in[i] += in[i-1]; - for (i = 17; i >= 3; i -= 2) - in[i] += in[i-2]; - - for (j = 0; j < 2; j++) { - tmp1 = tmp + j; - in1 = in + j; - - t2 = in1[2*4] + in1[2*8] - in1[2*2]; - - t3 = in1[2*0] + SHR(in1[2*6],1); - t1 = in1[2*0] - in1[2*6]; - tmp1[ 6] = t1 - SHR(t2,1); - tmp1[16] = t1 + t2; - - t0 = MULH3(in1[2*2] + in1[2*4] , C2, 2); - t1 = MULH3(in1[2*4] - in1[2*8] , -2*C8, 1); - t2 = MULH3(in1[2*2] + in1[2*8] , -C4, 2); - - tmp1[10] = t3 - t0 - t2; - tmp1[ 2] = t3 + t0 + t1; - tmp1[14] = t3 + t2 - t1; - - tmp1[ 4] = MULH3(in1[2*5] + in1[2*7] - in1[2*1], -C3, 2); - t2 = MULH3(in1[2*1] + in1[2*5], C1, 2); - t3 = MULH3(in1[2*5] - in1[2*7], -2*C7, 1); - t0 = MULH3(in1[2*3], C3, 2); - - t1 = MULH3(in1[2*1] + in1[2*7], -C5, 2); - - tmp1[ 0] = t2 + t3 + t0; - tmp1[12] = t2 + t1 - t0; - tmp1[ 8] = t3 - t1 - t0; - } - - i = 0; - for (j = 0; j < 4; j++) { - t0 = tmp[i]; - t1 = tmp[i + 2]; - s0 = t1 + t0; - s2 = t1 - t0; - - t2 = tmp[i + 1]; - t3 = tmp[i + 3]; - s1 = MULH3(t3 + t2, icos36h[ j], 2); - s3 = MULLx(t3 - t2, icos36 [8 - j], FRAC_BITS); - - t0 = s0 + s1; - t1 = s0 - s1; - out[(9 + j) * SBLIMIT] = MULH3(t1, win[ 9 + j], 1) + buf[4*(9 + j)]; - out[(8 - j) * SBLIMIT] = MULH3(t1, win[ 8 - j], 1) + buf[4*(8 - j)]; - buf[4 * ( 9 + j )] = MULH3(t0, win[18 + 9 + j], 1); - buf[4 * ( 8 - j )] = MULH3(t0, win[18 + 8 - j], 1); - - t0 = s2 + s3; - t1 = s2 - s3; - out[(9 + 8 - j) * SBLIMIT] = MULH3(t1, win[ 9 + 8 - j], 1) + buf[4*(9 + 8 - j)]; - out[ j * SBLIMIT] = MULH3(t1, win[ j], 1) + buf[4*( j)]; - buf[4 * ( 9 + 8 - j )] = MULH3(t0, win[18 + 9 + 8 - j], 1); - buf[4 * ( j )] = MULH3(t0, win[18 + j], 1); - i += 4; - } - - s0 = tmp[16]; - s1 = MULH3(tmp[17], icos36h[4], 2); - t0 = s0 + s1; - t1 = s0 - s1; - out[(9 + 4) * SBLIMIT] = MULH3(t1, win[ 9 + 4], 1) + buf[4*(9 + 4)]; - out[(8 - 4) * SBLIMIT] = MULH3(t1, win[ 8 - 4], 1) + buf[4*(8 - 4)]; - buf[4 * ( 9 + 4 )] = MULH3(t0, win[18 + 9 + 4], 1); - buf[4 * ( 8 - 4 )] = MULH3(t0, win[18 + 8 - 4], 1); -} - /* return the number of decoded frames */ static int mp_decode_layer1(MPADecodeContext *s) { @@ -1366,7 +1213,7 @@ static void compute_antialias(MPADecodeContext *s, GranuleDef *g) static void compute_imdct(MPADecodeContext *s, GranuleDef *g, INTFLOAT *sb_samples, INTFLOAT *mdct_buf) { - INTFLOAT *win, *win1, *out_ptr, *ptr, *buf, *ptr1; + INTFLOAT *win, *out_ptr, *ptr, *buf, *ptr1; INTFLOAT out2[12]; int i, j, mdct_long_end, sblimit; @@ -1392,26 +1239,16 @@ static void compute_imdct(MPADecodeContext *s, GranuleDef *g, mdct_long_end = sblimit; } - buf = mdct_buf; - ptr = g->sb_hybrid; - for (j = 0; j < mdct_long_end; j++) { - /* apply window & overlap with previous buffer */ - out_ptr = sb_samples + j; - /* select window */ - if (g->switch_point && j < 2) - win1 = mdct_win[0]; - else - win1 = mdct_win[g->block_type]; - /* select frequency inversion */ - win = win1 + ((4 * 36) & -(j & 1)); - imdct36(out_ptr, buf, ptr, win); - out_ptr += 18 * SBLIMIT; - ptr += 18; - buf += (j&3) != 3 ? 1 : (4*18-3); - } + s->mpadsp.RENAME(imdct36_blocks)(sb_samples, mdct_buf, g->sb_hybrid, + mdct_long_end, g->switch_point, + g->block_type); + + buf = mdct_buf + 4*18*(mdct_long_end >> 2) + (mdct_long_end & 3); + ptr = g->sb_hybrid + 18 * mdct_long_end; + for (j = mdct_long_end; j < sblimit; j++) { /* select frequency inversion */ - win = mdct_win[2 + (4 & -(j & 1))]; + win = RENAME(ff_mdct_win)[2 + (4 & -(j & 1))]; out_ptr = sb_samples + j; for (i = 0; i < 6; i++) { |