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avcodec/aacsbr_template: Remove pointless runtime initialization
The sbr_qmf_window_us array is basically symmetric around its middle element and therefore the latter half is currently initialized from the first half at runtime. Yet because the first half is initialized, the array can't be placed in .bss at all, so that one gains nothing from not already initializing the whole array statically. Therefore this commit does exactly this. (There are two exceptions to the symmetry: Elements 384 and 512 are the negations of their mirror element; for the fixed-point decoder, Q31(-x) does not equal -Q31(x). In order to keep the array exactly the same, the latter form has been used for these two elements.) Reviewed-by: Lynne <dev@lynne.ee> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt
parent
df56a1060c
commit
3526f3856a
@ -37,10 +37,6 @@
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static av_cold void aacsbr_tableinit(void)
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{
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int n;
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for (n = 1; n < 320; n++)
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sbr_qmf_window_us[320 + n] = sbr_qmf_window_us[320 - n];
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sbr_qmf_window_us[384] = -sbr_qmf_window_us[384];
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sbr_qmf_window_us[512] = -sbr_qmf_window_us[512];
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for (n = 0; n < 320; n++)
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sbr_qmf_window_ds[n] = sbr_qmf_window_us[2*n];
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@ -534,7 +534,9 @@ const DECLARE_ALIGNED(16, INTFLOAT, AAC_RENAME(ff_sbr_noise_table))[][2] = {
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///< window coefficients for analysis/synthesis QMF banks
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static DECLARE_ALIGNED(32, INTFLOAT, sbr_qmf_window_ds)[320];
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static DECLARE_ALIGNED(32, INTFLOAT, sbr_qmf_window_us)[640] = {
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/* This table contains redundancy: It is symmetric about the entry #320
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* with the exception of entries 384 and 512 which are negated. */
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static const DECLARE_ALIGNED(32, INTFLOAT, sbr_qmf_window_us)[640] = {
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Q31( 0.0000000000f), Q31(-0.0005525286f), Q31(-0.0005617692f), Q31(-0.0004947518f),
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Q31(-0.0004875227f), Q31(-0.0004893791f), Q31(-0.0005040714f), Q31(-0.0005226564f),
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Q31(-0.0005466565f), Q31(-0.0005677802f), Q31(-0.0005870930f), Q31(-0.0006132747f),
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@ -615,7 +617,86 @@ static DECLARE_ALIGNED(32, INTFLOAT, sbr_qmf_window_us)[640] = {
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Q31( 0.8311038457f), Q31( 0.8346937361f), Q31( 0.8379717337f), Q31( 0.8409541392f),
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Q31( 0.8436238281f), Q31( 0.8459818469f), Q31( 0.8480315777f), Q31( 0.8497805198f),
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Q31( 0.8511971524f), Q31( 0.8523047035f), Q31( 0.8531020949f), Q31( 0.8535720573f),
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Q31( 0.8537385600f),
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Q31( 0.8537385600f), Q31( 0.8535720573f), Q31( 0.8531020949f), Q31( 0.8523047035f),
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Q31( 0.8511971524f), Q31( 0.8497805198f), Q31( 0.8480315777f), Q31( 0.8459818469f),
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Q31( 0.8436238281f), Q31( 0.8409541392f), Q31( 0.8379717337f), Q31( 0.8346937361f),
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Q31( 0.8311038457f), Q31( 0.8272275347f), Q31( 0.8230419890f), Q31( 0.8185776004f),
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Q31( 0.8138191270f), Q31( 0.8087695004f), Q31( 0.8034485751f), Q31( 0.7978466413f),
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Q31( 0.7919735841f), Q31( 0.7858353120f), Q31( 0.7794287519f), Q31( 0.7727780881f),
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Q31( 0.7658674865f), Q31( 0.7587080760f), Q31( 0.7513137456f), Q31( 0.7436827863f),
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Q31( 0.7358211758f), Q31( 0.7277448900f), Q31( 0.7194462634f), Q31( 0.7109410426f),
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Q31( 0.7022388719f), Q31( 0.6933282376f), Q31( 0.6842353293f), Q31( 0.6749663190f),
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Q31( 0.6655139880f), Q31( 0.6559016302f), Q31( 0.6461269695f), Q31( 0.6361980107f),
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Q31( 0.6261242695f), Q31( 0.6159109932f), Q31( 0.6055783538f), Q31( 0.5951123086f),
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Q31( 0.5845403235f), Q31( 0.5738524131f), Q31( 0.5630789140f), Q31( 0.5522051258f),
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Q31( 0.5412553448f), Q31( 0.5302240895f), Q31( 0.5191234970f), Q31( 0.5079817500f),
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Q31( 0.4967708254f), Q31( 0.4855253091f), Q31( 0.4742453214f), Q31( 0.4629308085f),
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Q31( 0.4515996535f), Q31( 0.4402553754f), Q31( 0.4289119920f), Q31( 0.4175696896f),
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Q31( 0.4062317676f), Q31( 0.3949211761f), Q31( 0.3836350013f), Q31( 0.3723795546f),
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-Q31( 0.3611589903f), Q31(-0.3499914122f), Q31(-0.3388722693f), Q31(-0.3278113727f),
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Q31(-0.3168278913f), Q31(-0.3059098575f), Q31(-0.2950716717f), Q31(-0.2843214189f),
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Q31(-0.2736634040f), Q31(-0.2631053299f), Q31(-0.2526480309f), Q31(-0.2423016884f),
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Q31(-0.2320690870f), Q31(-0.2219652696f), Q31(-0.2119735853f), Q31(-0.2021250176f),
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Q31(-0.1923966745f), Q31(-0.1828172548f), Q31(-0.1733808172f), Q31(-0.1640958855f),
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Q31(-0.1549607071f), Q31(-0.1459766491f), Q31(-0.1371551761f), Q31(-0.1285002850f),
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Q31(-0.1200077984f), Q31(-0.1116826931f), Q31(-0.1035329531f), Q31(-0.0955533352f),
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Q31(-0.0877547536f), Q31(-0.0801372934f), Q31(-0.0726943300f), Q31(-0.0654409853f),
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Q31(-0.0583705326f), Q31(-0.0514804176f), Q31(-0.0447806821f), Q31(-0.0382776572f),
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Q31(-0.0319531274f), Q31(-0.0258227288f), Q31(-0.0198834129f), Q31(-0.0141288827f),
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Q31(-0.0085711749f), Q31(-0.0032086896f), Q31( 0.0019765601f), Q31( 0.0069636862f),
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Q31( 0.0117623832f), Q31( 0.0163701258f), Q31( 0.0207997072f), Q31( 0.0250307561f),
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Q31( 0.0290824006f), Q31( 0.0329583930f), Q31( 0.0366418116f), Q31( 0.0401458278f),
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Q31( 0.0434768782f), Q31( 0.0466303305f), Q31( 0.0495978676f), Q31( 0.0524093821f),
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Q31( 0.0550460034f), Q31( 0.0575152691f), Q31( 0.0598166570f), Q31( 0.0619602779f),
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Q31( 0.0639444805f), Q31( 0.0657690668f), Q31( 0.0674525021f), Q31( 0.0689664013f),
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Q31( 0.0703533073f), Q31( 0.0715826364f), Q31( 0.0726774642f), Q31( 0.0736406005f),
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Q31( 0.0744664394f), Q31( 0.0751576255f), Q31( 0.0757305756f), Q31( 0.0761748321f),
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Q31( 0.0765050718f), Q31( 0.0767204924f), Q31( 0.0768230011f), Q31( 0.0768173975f),
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Q31( 0.0767093490f), Q31( 0.0764992170f), Q31( 0.0761992479f), Q31( 0.0758008358f),
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Q31( 0.0753137336f), Q31( 0.0747452558f), Q31( 0.0741003642f), Q31( 0.0733620255f),
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Q31( 0.0725682583f), Q31( 0.0717002673f), Q31( 0.0707628710f), Q31( 0.0697630244f),
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Q31( 0.0687043828f), Q31( 0.0676075985f), Q31( 0.0664367512f), Q31( 0.0652247106f),
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Q31( 0.0639715898f), Q31( 0.0626857808f), Q31( 0.0613455171f), Q31( 0.0599837480f),
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Q31( 0.0585915683f), Q31( 0.0571616450f), Q31( 0.0557173648f), Q31( 0.0542452768f),
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Q31( 0.0527630746f), Q31( 0.0512556155f), Q31( 0.0497385755f), Q31( 0.0482165720f),
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Q31( 0.0466843027f), Q31( 0.0451488405f), Q31( 0.0436097542f), Q31( 0.0420649094f),
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Q31( 0.0405349170f), Q31( 0.0390053679f), Q31( 0.0374812850f), Q31( 0.0359697560f),
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Q31( 0.0344620948f), Q31( 0.0329754081f), Q31( 0.0315017608f), Q31( 0.0300502657f),
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Q31( 0.0286072173f), Q31( 0.0271859429f), Q31( 0.0257875847f), Q31( 0.0244160992f),
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Q31( 0.0230680169f), Q31( 0.0217467550f), Q31( 0.0204531793f), Q31( 0.0191872431f),
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Q31( 0.0179433381f), Q31( 0.0167324712f), Q31( 0.0155405553f), Q31( 0.0143904666f),
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-Q31( 0.0132718220f), Q31(-0.0121849995f), Q31(-0.0111315548f), Q31(-0.0101150215f),
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Q31(-0.0091325329f), Q31(-0.0081798233f), Q31(-0.0072615816f), Q31(-0.0063792293f),
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Q31(-0.0055337211f), Q31(-0.0047222596f), Q31(-0.0039401124f), Q31(-0.0031933778f),
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Q31(-0.0024826723f), Q31(-0.0018039472f), Q31(-0.0011568135f), Q31(-0.0005464280f),
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Q31( 0.0000276045f), Q31( 0.0005832264f), Q31( 0.0010902329f), Q31( 0.0015784682f),
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Q31( 0.0020274176f), Q31( 0.0024508540f), Q31( 0.0028446757f), Q31( 0.0032091885f),
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Q31( 0.0035401246f), Q31( 0.0038456408f), Q31( 0.0041251642f), Q31( 0.0043801861f),
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Q31( 0.0046039530f), Q31( 0.0048109469f), Q31( 0.0049839687f), Q31( 0.0051382275f),
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Q31( 0.0052715758f), Q31( 0.0053838975f), Q31( 0.0054753783f), Q31( 0.0055404363f),
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Q31( 0.0055917128f), Q31( 0.0056266114f), Q31( 0.0056389199f), Q31( 0.0056455196f),
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Q31( 0.0056220643f), Q31( 0.0055938023f), Q31( 0.0055475714f), Q31( 0.0054876040f),
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Q31( 0.0054196775f), Q31( 0.0053471681f), Q31( 0.0052461166f), Q31( 0.0051407353f),
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Q31( 0.0050393022f), Q31( 0.0049137603f), Q31( 0.0047932560f), Q31( 0.0046606460f),
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Q31( 0.0045209852f), Q31( 0.0043730719f), Q31( 0.0042264269f), Q31( 0.0040819753f),
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Q31( 0.0039207432f), Q31( 0.0037603922f), Q31( 0.0036008268f), Q31( 0.0034418874f),
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Q31( 0.0032739613f), Q31( 0.0031125420f), Q31( 0.0029469447f), Q31( 0.0027870464f),
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Q31( 0.0026201758f), Q31( 0.0024625616f), Q31( 0.0023017254f), Q31( 0.0021461583f),
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Q31( 0.0019841140f), Q31( 0.0018348265f), Q31( 0.0016868083f), Q31( 0.0015443219f),
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Q31( 0.0013902494f), Q31( 0.0012577884f), Q31( 0.0011250155f), Q31( 0.0009885988f),
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Q31( 0.0008608443f), Q31( 0.0007458025f), Q31( 0.0006239376f), Q31( 0.0005107388f),
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Q31( 0.0004026540f), Q31( 0.0002949531f), Q31( 0.0002043017f), Q31( 0.0001094383f),
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Q31( 0.0000134949f), Q31(-0.0000617334f), Q31(-0.0001446380f), Q31(-0.0002098337f),
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Q31(-0.0002896981f), Q31(-0.0003501175f), Q31(-0.0004095121f), Q31(-0.0004606325f),
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Q31(-0.0005145572f), Q31(-0.0005564576f), Q31(-0.0005946118f), Q31(-0.0006341594f),
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Q31(-0.0006650415f), Q31(-0.0006917937f), Q31(-0.0007215391f), Q31(-0.0007319357f),
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Q31(-0.0007530001f), Q31(-0.0007630793f), Q31(-0.0007757977f), Q31(-0.0007801449f),
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Q31(-0.0007803664f), Q31(-0.0007779869f), Q31(-0.0007834332f), Q31(-0.0007724848f),
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Q31(-0.0007681371f), Q31(-0.0007490598f), Q31(-0.0007440941f), Q31(-0.0007255043f),
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Q31(-0.0007157736f), Q31(-0.0006941614f), Q31(-0.0006777690f), Q31(-0.0006540333f),
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Q31(-0.0006312493f), Q31(-0.0006132747f), Q31(-0.0005870930f), Q31(-0.0005677802f),
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Q31(-0.0005466565f), Q31(-0.0005226564f), Q31(-0.0005040714f), Q31(-0.0004893791f),
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Q31(-0.0004875227f), Q31(-0.0004947518f), Q31(-0.0005617692f), Q31(-0.0005525286f),
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};
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#endif /* AVCODEC_AACSBRDATA_H */
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