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avcodec/aacdec_template: Don't init unused table for fixed-point decoder
The fixed-point decoder actually does not use the floating-point tables initialized by ff_aac_tableinit() at all. So don't initialize them for it; instead merge initializing these tables into ff_aac_float_common_init() which is already the function for the common static initializations of the floating-point AAC decoder and the (also floating-point) AAC encoder. Doing so saves also one AVOnce. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
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@ -1128,7 +1128,6 @@ static av_cold void aac_static_table_init(void)
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AAC_RENAME(ff_aac_sbr_init)();
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ff_aacdec_common_init_once();
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ff_aac_tableinit();
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// window initialization
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AAC_RENAME(avpriv_kbd_window_init)(AAC_RENAME(aac_kbd_long_960), 4.0, 960);
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@ -1210,9 +1210,6 @@ static av_cold int dsp_init(AVCodecContext *avctx, AACEncContext *s)
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if (!s->fdsp)
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return AVERROR(ENOMEM);
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// window init
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ff_aac_float_common_init();
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if ((ret = av_tx_init(&s->mdct1024, &s->mdct1024_fn, AV_TX_FLOAT_MDCT, 0,
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1024, &scale, 0)) < 0)
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return ret;
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@ -1359,6 +1356,9 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
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if (s->channels > 3)
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s->options.mid_side = 0;
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// Initialize static tables
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ff_aac_float_common_init();
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if ((ret = dsp_init(avctx, s)) < 0)
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return ret;
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@ -1393,7 +1393,6 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
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#endif
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ff_af_queue_init(avctx, &s->afq);
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ff_aac_tableinit();
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return 0;
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}
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@ -36,18 +36,64 @@
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#include <stdint.h>
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float ff_aac_pow2sf_tab[428];
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float ff_aac_pow34sf_tab[428];
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#if CONFIG_AAC_ENCODER || CONFIG_AAC_DECODER
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#include "kbdwin.h"
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#include "sinewin.h"
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float ff_aac_pow2sf_tab[428];
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float ff_aac_pow34sf_tab[428];
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DECLARE_ALIGNED(32, float, ff_aac_kbd_long_1024)[1024];
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DECLARE_ALIGNED(32, float, ff_aac_kbd_short_128)[128];
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static av_cold void aac_tableinit(void)
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{
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/* 2^(i/16) for 0 <= i <= 15 */
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static const float exp2_lut[] = {
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1.00000000000000000000,
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1.04427378242741384032,
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1.09050773266525765921,
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1.13878863475669165370,
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1.18920711500272106672,
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1.24185781207348404859,
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1.29683955465100966593,
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1.35425554693689272830,
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1.41421356237309504880,
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1.47682614593949931139,
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1.54221082540794082361,
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1.61049033194925430818,
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1.68179283050742908606,
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1.75625216037329948311,
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1.83400808640934246349,
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1.91520656139714729387,
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};
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float t1 = 8.8817841970012523233890533447265625e-16; // 2^(-50)
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float t2 = 3.63797880709171295166015625e-12; // 2^(-38)
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int t1_inc_cur, t2_inc_cur;
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int t1_inc_prev = 0;
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int t2_inc_prev = 8;
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for (int i = 0; i < 428; i++) {
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t1_inc_cur = 4 * (i % 4);
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t2_inc_cur = (8 + 3*i) % 16;
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if (t1_inc_cur < t1_inc_prev)
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t1 *= 2;
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if (t2_inc_cur < t2_inc_prev)
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t2 *= 2;
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// A much more efficient and accurate way of doing:
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// ff_aac_pow2sf_tab[i] = pow(2, (i - POW_SF2_ZERO) / 4.0);
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// ff_aac_pow34sf_tab[i] = pow(ff_aac_pow2sf_tab[i], 3.0/4.0);
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ff_aac_pow2sf_tab[i] = t1 * exp2_lut[t1_inc_cur];
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ff_aac_pow34sf_tab[i] = t2 * exp2_lut[t2_inc_cur];
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t1_inc_prev = t1_inc_cur;
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t2_inc_prev = t2_inc_cur;
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}
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}
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static av_cold void aac_float_common_init(void)
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{
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aac_tableinit();
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avpriv_kbd_window_init(ff_aac_kbd_long_1024, 4.0, 1024);
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avpriv_kbd_window_init(ff_aac_kbd_short_128, 6.0, 128);
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ff_init_ff_sine_windows(10);
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@ -3299,53 +3345,3 @@ const DECLARE_ALIGNED(32, int, ff_aac_eld_window_480_fixed)[1800] = {
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0xffecff1c, 0xffed391e, 0xffed740c, 0xffedafb1,
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0xffedebe1, 0xffee287d, 0xffee654e, 0xffeea23f,
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};
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static void aac_tableinit(void)
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{
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/* 2^(i/16) for 0 <= i <= 15 */
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static const float exp2_lut[] = {
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1.00000000000000000000,
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1.04427378242741384032,
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1.09050773266525765921,
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1.13878863475669165370,
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1.18920711500272106672,
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1.24185781207348404859,
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1.29683955465100966593,
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1.35425554693689272830,
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1.41421356237309504880,
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1.47682614593949931139,
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1.54221082540794082361,
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1.61049033194925430818,
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1.68179283050742908606,
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1.75625216037329948311,
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1.83400808640934246349,
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1.91520656139714729387,
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};
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float t1 = 8.8817841970012523233890533447265625e-16; // 2^(-50)
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float t2 = 3.63797880709171295166015625e-12; // 2^(-38)
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int t1_inc_cur, t2_inc_cur;
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int t1_inc_prev = 0;
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int t2_inc_prev = 8;
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for (int i = 0; i < 428; i++) {
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t1_inc_cur = 4 * (i % 4);
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t2_inc_cur = (8 + 3*i) % 16;
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if (t1_inc_cur < t1_inc_prev)
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t1 *= 2;
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if (t2_inc_cur < t2_inc_prev)
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t2 *= 2;
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// A much more efficient and accurate way of doing:
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// ff_aac_pow2sf_tab[i] = pow(2, (i - POW_SF2_ZERO) / 4.0);
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// ff_aac_pow34sf_tab[i] = pow(ff_aac_pow2sf_tab[i], 3.0/4.0);
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ff_aac_pow2sf_tab[i] = t1 * exp2_lut[t1_inc_cur];
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ff_aac_pow34sf_tab[i] = t2 * exp2_lut[t2_inc_cur];
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t1_inc_prev = t1_inc_cur;
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t2_inc_prev = t2_inc_cur;
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}
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}
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void ff_aac_tableinit(void)
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{
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static AVOnce init_static_once = AV_ONCE_INIT;
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ff_thread_once(&init_static_once, aac_tableinit);
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}
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@ -42,8 +42,6 @@
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extern float ff_aac_pow2sf_tab[428];
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extern float ff_aac_pow34sf_tab[428];
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void ff_aac_tableinit(void);
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/* @name ltp_coef
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* Table of the LTP coefficients
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*/
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