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author | Vitor Sessak <vitor1001@gmail.com> | 2010-06-30 20:11:27 +0000 |
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committer | Vitor Sessak <vitor1001@gmail.com> | 2010-06-30 20:11:27 +0000 |
commit | 06d01188e94321113684a271f62f6b0f2b818e53 (patch) | |
tree | 221fa77222aa1e088050256c9e2c06113fbfd749 /libavcodec/mpegaudiodec.c | |
parent | cae70f99a3bb0955a325ed58a9dfa88eff4a6199 (diff) | |
download | ffmpeg-streaming-06d01188e94321113684a271f62f6b0f2b818e53.zip ffmpeg-streaming-06d01188e94321113684a271f62f6b0f2b818e53.tar.gz |
More mp{1,2,3} 32-point DCT transform to our common DCT framework.
Should allow for future SIMD optimizations.
Originally committed as revision 23912 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/mpegaudiodec.c')
-rw-r--r-- | libavcodec/mpegaudiodec.c | 248 |
1 files changed, 9 insertions, 239 deletions
diff --git a/libavcodec/mpegaudiodec.c b/libavcodec/mpegaudiodec.c index bf85633..0ae21e0 100644 --- a/libavcodec/mpegaudiodec.c +++ b/libavcodec/mpegaudiodec.c @@ -67,6 +67,12 @@ #include "mpegaudiodata.h" #include "mpegaudiodectab.h" +#if CONFIG_FLOAT +# include "fft.h" +#else +# include "dct32.c" +#endif + static void compute_antialias_integer(MPADecodeContext *s, GranuleDef *g); static void compute_antialias_float(MPADecodeContext *s, GranuleDef *g); static void apply_window_mp3_c(MPA_INT *synth_buf, MPA_INT *window, @@ -349,6 +355,9 @@ static av_cold int decode_init(AVCodecContext * avctx) scale_factor_mult[i][2]); } +#if CONFIG_FLOAT + ff_dct_init(&s->dct, 5, DCT_II); +#endif RENAME(ff_mpa_synth_init)(RENAME(ff_mpa_synth_window)); /* huffman decode tables */ @@ -512,245 +521,6 @@ static av_cold int decode_init(AVCodecContext * avctx) return 0; } -/* tab[i][j] = 1.0 / (2.0 * cos(pi*(2*k+1) / 2^(6 - j))) */ - -/* cos(i*pi/64) */ - -#define COS0_0 FIXHR(0.50060299823519630134/2) -#define COS0_1 FIXHR(0.50547095989754365998/2) -#define COS0_2 FIXHR(0.51544730992262454697/2) -#define COS0_3 FIXHR(0.53104259108978417447/2) -#define COS0_4 FIXHR(0.55310389603444452782/2) -#define COS0_5 FIXHR(0.58293496820613387367/2) -#define COS0_6 FIXHR(0.62250412303566481615/2) -#define COS0_7 FIXHR(0.67480834145500574602/2) -#define COS0_8 FIXHR(0.74453627100229844977/2) -#define COS0_9 FIXHR(0.83934964541552703873/2) -#define COS0_10 FIXHR(0.97256823786196069369/2) -#define COS0_11 FIXHR(1.16943993343288495515/4) -#define COS0_12 FIXHR(1.48416461631416627724/4) -#define COS0_13 FIXHR(2.05778100995341155085/8) -#define COS0_14 FIXHR(3.40760841846871878570/8) -#define COS0_15 FIXHR(10.19000812354805681150/32) - -#define COS1_0 FIXHR(0.50241928618815570551/2) -#define COS1_1 FIXHR(0.52249861493968888062/2) -#define COS1_2 FIXHR(0.56694403481635770368/2) -#define COS1_3 FIXHR(0.64682178335999012954/2) -#define COS1_4 FIXHR(0.78815462345125022473/2) -#define COS1_5 FIXHR(1.06067768599034747134/4) -#define COS1_6 FIXHR(1.72244709823833392782/4) -#define COS1_7 FIXHR(5.10114861868916385802/16) - -#define COS2_0 FIXHR(0.50979557910415916894/2) -#define COS2_1 FIXHR(0.60134488693504528054/2) -#define COS2_2 FIXHR(0.89997622313641570463/2) -#define COS2_3 FIXHR(2.56291544774150617881/8) - -#define COS3_0 FIXHR(0.54119610014619698439/2) -#define COS3_1 FIXHR(1.30656296487637652785/4) - -#define COS4_0 FIXHR(0.70710678118654752439/2) - -/* butterfly operator */ -#define BF(a, b, c, s)\ -{\ - tmp0 = val##a + val##b;\ - tmp1 = val##a - val##b;\ - val##a = tmp0;\ - val##b = MULH3(tmp1, c, 1<<(s));\ -} - -#define BF0(a, b, c, s)\ -{\ - tmp0 = tab[a] + tab[b];\ - tmp1 = tab[a] - tab[b];\ - val##a = tmp0;\ - val##b = MULH3(tmp1, c, 1<<(s));\ -} - -#define BF1(a, b, c, d)\ -{\ - BF(a, b, COS4_0, 1);\ - BF(c, d,-COS4_0, 1);\ - val##c += val##d;\ -} - -#define BF2(a, b, c, d)\ -{\ - BF(a, b, COS4_0, 1);\ - BF(c, d,-COS4_0, 1);\ - val##c += val##d;\ - val##a += val##c;\ - val##c += val##b;\ - val##b += val##d;\ -} - -#define ADD(a, b) val##a += val##b - -/* DCT32 without 1/sqrt(2) coef zero scaling. */ -static void dct32(INTFLOAT *out, const INTFLOAT *tab) -{ - INTFLOAT tmp0, tmp1; - - INTFLOAT val0 , val1 , val2 , val3 , val4 , val5 , val6 , val7 , - val8 , val9 , val10, val11, val12, val13, val14, val15, - val16, val17, val18, val19, val20, val21, val22, val23, - val24, val25, val26, val27, val28, val29, val30, val31; - - /* pass 1 */ - BF0( 0, 31, COS0_0 , 1); - BF0(15, 16, COS0_15, 5); - /* pass 2 */ - BF( 0, 15, COS1_0 , 1); - BF(16, 31,-COS1_0 , 1); - /* pass 1 */ - BF0( 7, 24, COS0_7 , 1); - BF0( 8, 23, COS0_8 , 1); - /* pass 2 */ - BF( 7, 8, COS1_7 , 4); - BF(23, 24,-COS1_7 , 4); - /* pass 3 */ - BF( 0, 7, COS2_0 , 1); - BF( 8, 15,-COS2_0 , 1); - BF(16, 23, COS2_0 , 1); - BF(24, 31,-COS2_0 , 1); - /* pass 1 */ - BF0( 3, 28, COS0_3 , 1); - BF0(12, 19, COS0_12, 2); - /* pass 2 */ - BF( 3, 12, COS1_3 , 1); - BF(19, 28,-COS1_3 , 1); - /* pass 1 */ - BF0( 4, 27, COS0_4 , 1); - BF0(11, 20, COS0_11, 2); - /* pass 2 */ - BF( 4, 11, COS1_4 , 1); - BF(20, 27,-COS1_4 , 1); - /* pass 3 */ - BF( 3, 4, COS2_3 , 3); - BF(11, 12,-COS2_3 , 3); - BF(19, 20, COS2_3 , 3); - BF(27, 28,-COS2_3 , 3); - /* pass 4 */ - BF( 0, 3, COS3_0 , 1); - BF( 4, 7,-COS3_0 , 1); - BF( 8, 11, COS3_0 , 1); - BF(12, 15,-COS3_0 , 1); - BF(16, 19, COS3_0 , 1); - BF(20, 23,-COS3_0 , 1); - BF(24, 27, COS3_0 , 1); - BF(28, 31,-COS3_0 , 1); - - - - /* pass 1 */ - BF0( 1, 30, COS0_1 , 1); - BF0(14, 17, COS0_14, 3); - /* pass 2 */ - BF( 1, 14, COS1_1 , 1); - BF(17, 30,-COS1_1 , 1); - /* pass 1 */ - BF0( 6, 25, COS0_6 , 1); - BF0( 9, 22, COS0_9 , 1); - /* pass 2 */ - BF( 6, 9, COS1_6 , 2); - BF(22, 25,-COS1_6 , 2); - /* pass 3 */ - BF( 1, 6, COS2_1 , 1); - BF( 9, 14,-COS2_1 , 1); - BF(17, 22, COS2_1 , 1); - BF(25, 30,-COS2_1 , 1); - - /* pass 1 */ - BF0( 2, 29, COS0_2 , 1); - BF0(13, 18, COS0_13, 3); - /* pass 2 */ - BF( 2, 13, COS1_2 , 1); - BF(18, 29,-COS1_2 , 1); - /* pass 1 */ - BF0( 5, 26, COS0_5 , 1); - BF0(10, 21, COS0_10, 1); - /* pass 2 */ - BF( 5, 10, COS1_5 , 2); - BF(21, 26,-COS1_5 , 2); - /* pass 3 */ - BF( 2, 5, COS2_2 , 1); - BF(10, 13,-COS2_2 , 1); - BF(18, 21, COS2_2 , 1); - BF(26, 29,-COS2_2 , 1); - /* pass 4 */ - BF( 1, 2, COS3_1 , 2); - BF( 5, 6,-COS3_1 , 2); - BF( 9, 10, COS3_1 , 2); - BF(13, 14,-COS3_1 , 2); - BF(17, 18, COS3_1 , 2); - BF(21, 22,-COS3_1 , 2); - BF(25, 26, COS3_1 , 2); - BF(29, 30,-COS3_1 , 2); - - /* pass 5 */ - BF1( 0, 1, 2, 3); - BF2( 4, 5, 6, 7); - BF1( 8, 9, 10, 11); - BF2(12, 13, 14, 15); - BF1(16, 17, 18, 19); - BF2(20, 21, 22, 23); - BF1(24, 25, 26, 27); - BF2(28, 29, 30, 31); - - /* pass 6 */ - - ADD( 8, 12); - ADD(12, 10); - ADD(10, 14); - ADD(14, 9); - ADD( 9, 13); - ADD(13, 11); - ADD(11, 15); - - out[ 0] = val0; - out[16] = val1; - out[ 8] = val2; - out[24] = val3; - out[ 4] = val4; - out[20] = val5; - out[12] = val6; - out[28] = val7; - out[ 2] = val8; - out[18] = val9; - out[10] = val10; - out[26] = val11; - out[ 6] = val12; - out[22] = val13; - out[14] = val14; - out[30] = val15; - - ADD(24, 28); - ADD(28, 26); - ADD(26, 30); - ADD(30, 25); - ADD(25, 29); - ADD(29, 27); - ADD(27, 31); - - out[ 1] = val16 + val24; - out[17] = val17 + val25; - out[ 9] = val18 + val26; - out[25] = val19 + val27; - out[ 5] = val20 + val28; - out[21] = val21 + val29; - out[13] = val22 + val30; - out[29] = val23 + val31; - out[ 3] = val24 + val20; - out[19] = val25 + val21; - out[11] = val26 + val22; - out[27] = val27 + val23; - out[ 7] = val28 + val18; - out[23] = val29 + val19; - out[15] = val30 + val17; - out[31] = val31; -} #if CONFIG_FLOAT static inline float round_sample(float *sum) |