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Diffstat (limited to 'libFDK/src/arm/dct_arm.cpp')
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diff --git a/libFDK/src/arm/dct_arm.cpp b/libFDK/src/arm/dct_arm.cpp new file mode 100644 index 0000000..187c843 --- /dev/null +++ b/libFDK/src/arm/dct_arm.cpp @@ -0,0 +1,456 @@ + +/* ----------------------------------------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. + All rights reserved. + + 1. INTRODUCTION +The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements +the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. +This FDK AAC Codec software is intended to be used on a wide variety of Android devices. + +AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual +audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by +independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part +of the MPEG specifications. + +Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) +may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners +individually for the purpose of encoding or decoding bit streams in products that are compliant with +the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license +these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec +software may already be covered under those patent licenses when it is used for those licensed purposes only. + +Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, +are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional +applications information and documentation. + +2. COPYRIGHT LICENSE + +Redistribution and use in source and binary forms, with or without modification, are permitted without +payment of copyright license fees provided that you satisfy the following conditions: + +You must retain the complete text of this software license in redistributions of the FDK AAC Codec or +your modifications thereto in source code form. + +You must retain the complete text of this software license in the documentation and/or other materials +provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. +You must make available free of charge copies of the complete source code of the FDK AAC Codec and your +modifications thereto to recipients of copies in binary form. + +The name of Fraunhofer may not be used to endorse or promote products derived from this library without +prior written permission. + +You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec +software or your modifications thereto. + +Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software +and the date of any change. For modified versions of the FDK AAC Codec, the term +"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term +"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." + +3. NO PATENT LICENSE + +NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, +ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with +respect to this software. + +You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized +by appropriate patent licenses. + +4. DISCLAIMER + +This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors +"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties +of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR +CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, +including but not limited to procurement of substitute goods or services; loss of use, data, or profits, +or business interruption, however caused and on any theory of liability, whether in contract, strict +liability, or tort (including negligence), arising in any way out of the use of this software, even if +advised of the possibility of such damage. + +5. CONTACT INFORMATION + +Fraunhofer Institute for Integrated Circuits IIS +Attention: Audio and Multimedia Departments - FDK AAC LL +Am Wolfsmantel 33 +91058 Erlangen, Germany + +www.iis.fraunhofer.de/amm +amm-info@iis.fraunhofer.de +----------------------------------------------------------------------------------------------------------- */ + + + +#ifdef FUNCTION_dct_IV_func1 + +/* + Note: This assembler routine is here, because the ARM926 compiler does + not encode the inline assembler with optimal speed. + With this version, we save 2 cycles per loop iteration. +*/ + +__asm void dct_IV_func1( + int i, + const FIXP_SPK *twiddle, + FIXP_DBL *RESTRICT pDat_0, + FIXP_DBL *RESTRICT pDat_1) +{ + /* Register map: + r0 i + r1 twiddle + r2 pDat_0 + r3 pDat_1 + r4 accu1 + r5 accu2 + r6 accu3 + r7 accu4 + r8 val_tw + r9 accuX + */ + PUSH {r4-r9} + + /* 44 cycles for 2 iterations = 22 cycles/iteration */ +dct_IV_loop1_start +/* First iteration */ + LDR r8, [r1], #4 // val_tw = *twiddle++; + LDR r5, [r2, #0] // accu2 = pDat_0[0] + LDR r4, [r3, #0] // accu1 = pDat_1[0] + + SMULWT r9, r5, r8 // accuX = accu2*val_tw.l + SMULWB r5, r5, r8 // accu2 = accu2*val_tw.h + RSB r9, r9, #0 // accuX =-accu2*val_tw.l + SMLAWT r5, r4, r8, r5 // accu2 = accu2*val_tw.h + accu1*val_tw.l + SMLAWB r4, r4, r8, r9 // accu1 = accu1*val_tw.h - accu2*val_tw.l + + LDR r8, [r1], #4 // val_tw = *twiddle++; + LDR r7, [r3, #-4] // accu4 = pDat_1[-1] + LDR r6, [r2, #4] // accu3 = pDat_0[1] + + SMULWB r9, r7, r8 // accuX = accu4*val_tw.h + SMULWT r7, r7, r8 // accu4 = accu4*val_tw.l + RSB r9, r9, #0 // accuX =-accu4*val_tw.h + SMLAWB r7, r6, r8, r7 // accu4 = accu4*val_tw.l+accu3*val_tw.h + SMLAWT r6, r6, r8, r9 // accu3 = accu3*val_tw.l-accu4*val_tw.h + + STR r5, [r2], #4 // *pDat_0++ = accu2 + STR r4, [r2], #4 // *pDat_0++ = accu1 + STR r6, [r3], #-4 // *pDat_1-- = accu3 + STR r7, [r3], #-4 // *pDat_1-- = accu4 + +/* Second iteration */ + LDR r8, [r1], #4 // val_tw = *twiddle++; + LDR r5, [r2, #0] // accu2 = pDat_0[0] + LDR r4, [r3, #0] // accu1 = pDat_1[0] + + SMULWT r9, r5, r8 // accuX = accu2*val_tw.l + SMULWB r5, r5, r8 // accu2 = accu2*val_tw.h + RSB r9, r9, #0 // accuX =-accu2*val_tw.l + SMLAWT r5, r4, r8, r5 // accu2 = accu2*val_tw.h + accu1*val_tw.l + SMLAWB r4, r4, r8, r9 // accu1 = accu1*val_tw.h - accu2*val_tw.l + + LDR r8, [r1], #4 // val_tw = *twiddle++; + LDR r7, [r3, #-4] // accu4 = pDat_1[-1] + LDR r6, [r2, #4] // accu3 = pDat_0[1] + + SMULWB r9, r7, r8 // accuX = accu4*val_tw.h + SMULWT r7, r7, r8 // accu4 = accu4*val_tw.l + RSB r9, r9, #0 // accuX =-accu4*val_tw.h + SMLAWB r7, r6, r8, r7 // accu4 = accu4*val_tw.l+accu3*val_tw.h + SMLAWT r6, r6, r8, r9 // accu3 = accu3*val_tw.l-accu4*val_tw.h + + STR r5, [r2], #4 // *pDat_0++ = accu2 + STR r4, [r2], #4 // *pDat_0++ = accu1 + STR r6, [r3], #-4 // *pDat_1-- = accu3 + STR r7, [r3], #-4 // *pDat_1-- = accu4 + + SUBS r0, r0, #1 + BNE dct_IV_loop1_start + + POP {r4-r9} + + BX lr +} + +#endif /* FUNCTION_dct_IV_func1 */ + + +#ifdef FUNCTION_dct_IV_func2 + +FDK_INLINE +/* __attribute__((noinline)) */ +static void dct_IV_func2( + int i, + const FIXP_SPK *twiddle, + FIXP_DBL *pDat_0, + FIXP_DBL *pDat_1, + int inc) +{ + FIXP_DBL accu1, accu2, accu3, accu4, accuX; + LONG val_tw; + + accu1 = pDat_1[-2]; + accu2 = pDat_1[-1]; + + *--pDat_1 = -(pDat_0[1]>>1); + *pDat_0++ = (pDat_0[0]>>1); + + twiddle += inc; + +__asm + { + LDR val_tw, [twiddle], inc, LSL #2 // val_tw = *twiddle; twiddle += inc + B dct_IV_loop2_2nd_part + + /* 42 cycles for 2 iterations = 21 cycles/iteration */ +dct_IV_loop2: + SMULWT accuX, accu2, val_tw + SMULWB accu2, accu2, val_tw + RSB accuX, accuX, #0 + SMLAWB accuX, accu1, val_tw, accuX + SMLAWT accu2, accu1, val_tw, accu2 + STR accuX, [pDat_0], #4 + STR accu2, [pDat_1, #-4] ! + + LDR accu4, [pDat_0, #4] + LDR accu3, [pDat_0] + SMULWB accuX, accu4, val_tw + SMULWT accu4, accu4, val_tw + RSB accuX, accuX, #0 + SMLAWT accuX, accu3, val_tw, accuX + SMLAWB accu4, accu3, val_tw, accu4 + + LDR accu1, [pDat_1, #-8] + LDR accu2, [pDat_1, #-4] + + LDR val_tw, [twiddle], inc, LSL #2 // val_tw = *twiddle; twiddle += inc + + STR accuX, [pDat_1, #-4] ! + STR accu4, [pDat_0], #4 + +dct_IV_loop2_2nd_part: + SMULWT accuX, accu2, val_tw + SMULWB accu2, accu2, val_tw + RSB accuX, accuX, #0 + SMLAWB accuX, accu1, val_tw, accuX + SMLAWT accu2, accu1, val_tw, accu2 + STR accuX, [pDat_0], #4 + STR accu2, [pDat_1, #-4] ! + + LDR accu4, [pDat_0, #4] + LDR accu3, [pDat_0] + SMULWB accuX, accu4, val_tw + SMULWT accu4, accu4, val_tw + RSB accuX, accuX, #0 + SMLAWT accuX, accu3, val_tw, accuX + SMLAWB accu4, accu3, val_tw, accu4 + + LDR accu1, [pDat_1, #-8] + LDR accu2, [pDat_1, #-4] + + STR accuX, [pDat_1, #-4] ! + STR accu4, [pDat_0], #4 + + LDR val_tw, [twiddle], inc, LSL #2 // val_tw = *twiddle; twiddle += inc + + SUBS i, i, #1 + BNE dct_IV_loop2 + } + + /* Last Sin and Cos value pair are the same */ + accu1 = fMultDiv2(accu1, WTC(0x5a82799a)); + accu2 = fMultDiv2(accu2, WTC(0x5a82799a)); + + *--pDat_1 = accu1 + accu2; + *pDat_0++ = accu1 - accu2; +} +#endif /* FUNCTION_dct_IV_func2 */ + + +#ifdef FUNCTION_dst_IV_func1 + +__asm void dst_IV_func1( + int i, + const FIXP_SPK *twiddle, + FIXP_DBL *pDat_0, + FIXP_DBL *pDat_1) +{ + /* Register map: + r0 i + r1 twiddle + r2 pDat_0 + r3 pDat_1 + r4 accu1 + r5 accu2 + r6 accu3 + r7 accu4 + r8 val_tw + r9 accuX + */ + PUSH {r4-r9} + +dst_IV_loop1 + LDR r8, [r1], #4 // val_tw = *twiddle++ + LDR r5, [r2] // accu2 = pDat_0[0] + LDR r6, [r2, #4] // accu3 = pDat_0[1] + RSB r5, r5, #0 // accu2 = -accu2 + SMULWT r9, r5, r8 // accuX = (-accu2)*val_tw.l + LDR r4, [r3, #-4] // accu1 = pDat_1[-1] + RSB r9, r9, #0 // accuX = -(-accu2)*val_tw.l + SMLAWB r9, r4, r8, r9 // accuX = accu1*val_tw.h-(-accu2)*val_tw.l + SMULWT r4, r4, r8 // accu1 = accu1*val_tw.l + LDR r7, [r3, #-8] // accu4 = pDat_1[-2] + SMLAWB r5, r5, r8, r4 // accu2 = (-accu2)*val_tw.t+accu1*val_tw.l + LDR r8, [r1], #4 // val_tw = *twiddle++ + STR r5, [r2], #4 // *pDat_0++ = accu2 + STR r9, [r2], #4 // *pDat_0++ = accu1 (accuX) + RSB r7, r7, #0 // accu4 = -accu4 + SMULWB r5, r7, r8 // accu2 = (-accu4)*val_tw.h + SMULWB r4, r6, r8 // accu1 = (-accu4)*val_tw.l + RSB r5, r5, #0 // accu2 = -(-accu4)*val_tw.h + SMLAWT r6, r6, r8, r5 // accu3 = (-accu4)*val_tw.l-(-accu3)*val_tw.h + SMLAWT r7, r7, r8, r4 // accu4 = (-accu3)*val_tw.l+(-accu4)*val_tw.h + STR r6, [r3, #-4] ! // *--pDat_1 = accu3 + STR r7, [r3, #-4] ! // *--pDat_1 = accu4 + + LDR r8, [r1], #4 // val_tw = *twiddle++ + LDR r5, [r2] // accu2 = pDat_0[0] + LDR r6, [r2, #4] // accu3 = pDat_0[1] + RSB r5, r5, #0 // accu2 = -accu2 + SMULWT r9, r5, r8 // accuX = (-accu2)*val_tw.l + LDR r4, [r3, #-4] // accu1 = pDat_1[-1] + RSB r9, r9, #0 // accuX = -(-accu2)*val_tw.l + SMLAWB r9, r4, r8, r9 // accuX = accu1*val_tw.h-(-accu2)*val_tw.l + SMULWT r4, r4, r8 // accu1 = accu1*val_tw.l + LDR r7, [r3, #-8] // accu4 = pDat_1[-2] + SMLAWB r5, r5, r8, r4 // accu2 = (-accu2)*val_tw.t+accu1*val_tw.l + LDR r8, [r1], #4 // val_tw = *twiddle++ + STR r5, [r2], #4 // *pDat_0++ = accu2 + STR r9, [r2], #4 // *pDat_0++ = accu1 (accuX) + RSB r7, r7, #0 // accu4 = -accu4 + SMULWB r5, r7, r8 // accu2 = (-accu4)*val_tw.h + SMULWB r4, r6, r8 // accu1 = (-accu4)*val_tw.l + RSB r5, r5, #0 // accu2 = -(-accu4)*val_tw.h + SMLAWT r6, r6, r8, r5 // accu3 = (-accu4)*val_tw.l-(-accu3)*val_tw.h + SMLAWT r7, r7, r8, r4 // accu4 = (-accu3)*val_tw.l+(-accu4)*val_tw.h + STR r6, [r3, #-4] ! // *--pDat_1 = accu3 + STR r7, [r3, #-4] ! // *--pDat_1 = accu4 + + SUBS r0, r0, #4 // i-= 4 + BNE dst_IV_loop1 + + POP {r4-r9} + BX lr +} +#endif /* FUNCTION_dst_IV_func1 */ + +#ifdef FUNCTION_dst_IV_func2 + +FDK_INLINE +/* __attribute__((noinline)) */ +static void dst_IV_func2( + int i, + const FIXP_SPK *twiddle, + FIXP_DBL *RESTRICT pDat_0, + FIXP_DBL *RESTRICT pDat_1, + int inc) +{ + FIXP_DBL accu1,accu2,accu3,accu4; + LONG val_tw; + + accu4 = pDat_0[0]; + accu3 = pDat_0[1]; + accu4 >>= 1; + accu3 >>= 1; + accu4 = -accu4; + + accu1 = pDat_1[-1]; + accu2 = pDat_1[0]; + + *pDat_0++ = accu3; + *pDat_1-- = accu4; + + + __asm + { + B dst_IV_loop2_2nd_part + + /* 50 cycles for 2 iterations = 25 cycles/iteration */ + +dst_IV_loop2: + + LDR val_tw, [twiddle], inc, LSL #2 // val_tw = *twiddle; twiddle += inc + + RSB accu2, accu2, #0 // accu2 = -accu2 + RSB accu1, accu1, #0 // accu1 = -accu1 + SMULWT accu3, accu2, val_tw // accu3 = (-accu2)*val_tw.l + SMULWT accu4, accu1, val_tw // accu4 = (-accu1)*val_tw.l + RSB accu3, accu3, #0 // accu3 = -accu2*val_tw.l + SMLAWB accu1, accu1, val_tw, accu3 // accu1 = -accu1*val_tw.h-(-accu2)*val_tw.l + SMLAWB accu2, accu2, val_tw, accu4 // accu2 = (-accu1)*val_tw.l+(-accu2)*val_tw.h + STR accu1, [pDat_1], #-4 // *pDat_1-- = accu1 + STR accu2, [pDat_0], #4 // *pDat_0++ = accu2 + + LDR accu4, [pDat_0] // accu4 = pDat_0[0] + LDR accu3, [pDat_0, #4] // accu3 = pDat_0[1] + + RSB accu4, accu4, #0 // accu4 = -accu4 + RSB accu3, accu3, #0 // accu3 = -accu3 + + SMULWB accu1, accu3, val_tw // accu1 = (-accu3)*val_tw.h + SMULWT accu2, accu3, val_tw // accu2 = (-accu3)*val_tw.l + RSB accu1, accu1, #0 // accu1 = -(-accu3)*val_tw.h + SMLAWT accu3, accu4, val_tw, accu1 // accu3 = (-accu4)*val_tw.l-(-accu3)*val_tw.h + SMLAWB accu4, accu4, val_tw, accu2 // accu4 = (-accu3)*val_tw.l+(-accu4)*val_tw.h + + LDR accu1, [pDat_1, #-4] // accu1 = pDat_1[-1] + LDR accu2, [pDat_1] // accu2 = pDat_1[0] + + STR accu3, [pDat_0], #4 // *pDat_0++ = accu3 + STR accu4, [pDat_1], #-4 // *pDat_1-- = accu4 + +dst_IV_loop2_2nd_part: + + LDR val_tw, [twiddle], inc, LSL #2 // val_tw = *twiddle; twiddle += inc + + RSB accu2, accu2, #0 // accu2 = -accu2 + RSB accu1, accu1, #0 // accu1 = -accu1 + SMULWT accu3, accu2, val_tw // accu3 = (-accu2)*val_tw.l + SMULWT accu4, accu1, val_tw // accu4 = (-accu1)*val_tw.l + RSB accu3, accu3, #0 // accu3 = -accu2*val_tw.l + SMLAWB accu1, accu1, val_tw, accu3 // accu1 = -accu1*val_tw.h-(-accu2)*val_tw.l + SMLAWB accu2, accu2, val_tw, accu4 // accu2 = (-accu1)*val_tw.l+(-accu2)*val_tw.h + STR accu1, [pDat_1], #-4 // *pDat_1-- = accu1 + STR accu2, [pDat_0], #4 // *pDat_0++ = accu2 + + LDR accu4, [pDat_0] // accu4 = pDat_0[0] + LDR accu3, [pDat_0, #4] // accu3 = pDat_0[1] + + RSB accu4, accu4, #0 // accu4 = -accu4 + RSB accu3, accu3, #0 // accu3 = -accu3 + + SMULWB accu1, accu3, val_tw // accu1 = (-accu3)*val_tw.h + SMULWT accu2, accu3, val_tw // accu2 = (-accu3)*val_tw.l + RSB accu1, accu1, #0 // accu1 = -(-accu3)*val_tw.h + SMLAWT accu3, accu4, val_tw, accu1 // accu3 = (-accu4)*val_tw.l-(-accu3)*val_tw.h + SMLAWB accu4, accu4, val_tw, accu2 // accu4 = (-accu3)*val_tw.l+(-accu4)*val_tw.h + + LDR accu1, [pDat_1, #-4] // accu1 = pDat_1[-1] + LDR accu2, [pDat_1] // accu2 = pDat_1[0] + + STR accu3, [pDat_0], #4 // *pDat_0++ = accu3 + STR accu4, [pDat_1], #-4 // *pDat_1-- = accu4 + + SUBS i, i, #1 + BNE dst_IV_loop2 + } + + /* Last Sin and Cos value pair are the same */ + accu1 = fMultDiv2(-accu1, WTC(0x5a82799a)); + accu2 = fMultDiv2(-accu2, WTC(0x5a82799a)); + + *pDat_0 = accu1 + accu2; + *pDat_1 = accu1 - accu2; +} +#endif /* FUNCTION_dst_IV_func2 */ |