search for: tdac

...im = yp0[0]; + t0 = t[i]; + t1 = t[N4+i]; + /* We'd scale up by 2 here, but instead it's done when mixing the windows */ + yp0[0] = S_MUL(re,t0) + S_MUL(im,t1); + yp0[1] = S_MUL(re,t1) - S_MUL(im,t0); + } } /* Mirror on both sides for TDAC */ Regards, Marcello On 05/02/2014 18:46, "Gregory Maxwell" <gmaxwell at gmail.com> wrote: >On Wed, Feb 5, 2014 at 8:05 AM, Marcello Caramma (mcaramma) ><mcaramma at cisco.com> wrote: >> Hi, >> >> Apologies if this is a known issue, but running m...

...ime about this issue. I have started with patents listed on the website of "www.mp3licensing.com". Some of them are very generic and it appears as if Vorbis code might be infringing upon few of them. They are (with their patent numbers and titles) : 5,384,811: Method for transmitting a TDAC coded audio signal 5,321,729: Method for transmitting a signal using adaptive window functions 5,214,742: Method for transmitting an audio signal using adaptive window functions 5,742,735: Digital adaptive transformation coding method They are many other patents for stereo processing, which are no...

...t1 = t[N4+i]; > + /* We'd scale up by 2 here, but instead it's done when mixing > the windows */ > + yp0[0] = S_MUL(re,t0) + S_MUL(im,t1); > + yp0[1] = S_MUL(re,t1) - S_MUL(im,t0); > + } > } > > /* Mirror on both sides for TDAC */ > > > Regards, > > Marcello > > > > On 05/02/2014 18:46, "Gregory Maxwell" <gmaxwell at gmail.com> wrote: > >> On Wed, Feb 5, 2014 at 8:05 AM, Marcello Caramma (mcaramma) >> <mcaramma at cisco.com> wrote: >>> Hi, >>&g...

...t1 = t[N4+i]; > + /* We'd scale up by 2 here, but instead it's done when mixing > the windows */ > + yp0[0] = S_MUL(re,t0) + S_MUL(im,t1); > + yp0[1] = S_MUL(re,t1) - S_MUL(im,t0); > + } > } > > /* Mirror on both sides for TDAC */ > > > Regards, > > Marcello > > > > On 05/02/2014 18:46, "Gregory Maxwell" <gmaxwell at gmail.com> wrote: > >> On Wed, Feb 5, 2014 at 8:05 AM, Marcello Caramma (mcaramma) >> <mcaramma at cisco.com> wrote: >>> Hi, >>&g...

...9;d scale up by 2 here, but instead it's done when mixing the windows */ + yr = S_MUL(re,t0) + S_MUL(im,t1); + yi = S_MUL(re,t1) - S_MUL(im,t0); + yp1[0] = yr; + yp0[1] = yi; + yp0 += 2; + yp1 -= 2; + } + } + + /* Mirror on both sides for TDAC */ + { + kiss_fft_scalar * OPUS_RESTRICT xp1 = out+overlap-1; + kiss_fft_scalar * OPUS_RESTRICT yp1 = out; + const opus_val16 * OPUS_RESTRICT wp1 = window; + const opus_val16 * OPUS_RESTRICT wp2 = window+overlap-1; + + for(i = 0; i < overlap/2; i++) + { +...

...9;d scale up by 2 here, but instead it's done when mixing the windows */ + yr = S_MUL(re,t0) + S_MUL(im,t1); + yi = S_MUL(re,t1) - S_MUL(im,t0); + yp1[0] = yr; + yp0[1] = yi; + yp0 += 2; + yp1 -= 2; + } + } + + /* Mirror on both sides for TDAC */ + { + kiss_fft_scalar * OPUS_RESTRICT xp1 = out+overlap-1; + kiss_fft_scalar * OPUS_RESTRICT yp1 = out; + const opus_val16 * OPUS_RESTRICT wp1 = window; + const opus_val16 * OPUS_RESTRICT wp2 = window+overlap-1; + + for(i = 0; i < overlap/2; i++) + { +...

Hello All, I extended the libNE10 optimizations for float towards mdct_backwards/opus_ifft. I am able to get about 14.26% improvement for Decode use case now on my Beaglebone Black. Please see [1] for measurements. Questions 1. Since this patch needs to go in after Encode [2] patch) should I submit this as patch series? 2. Since Jonathan Lennox posted intrinsics cleanup [3] patch, should

Hi, Apologies if this is a known issue, but running make on revision e3187444692195957eb66989622c7b1ad8448b06 fails one of the tests when using fixed point configuration (floating point is ok) on my linux x86. Note that libopus1.1, as extracted from the tar ball, is OK. Specifically, the tests that fail are in celt/tests/test_unit_mdct: nfft=32 inverse=0,snr = 85.341197 nfft=32 inverse=1,snr =

Hi All, Since I continue to base my work on top of Jonathan's patch, and my previous Ne10 fft/ifft/mdct_forward/backward patches, I thought it would be better to just post all new patches as a patch series. Please let me know if anyone disagrees with this approach. You can see wip branch of all latest patches at https://git.linaro.org/people/viswanath.puttagunta/opus.git Branch:

Hi Timothy, As I mentioned earlier [1], I now fixed compile issues with fixed point and resubmitting the patch. I also have new patch that does intrinsics optimizations for celt_pitch_xcorr targetting aarch64. You can find my latest work-in-progress branch at [2] For reference, you can use the Ne10 pre-built libraries at [3] Note that I am working with Phil at ARM to get my patch at [4]

Hi All, As per Timothy's suggestion, disabling mdct_forward for fixed point. Only effects armv7,armv8: Extend fixed fft NE10 optimizations to mdct Rest of patches are same as in [1] For reference, latest wip code for opus is at [2] Still working with NE10 team at ARM to get corner cases of mdct_forward. Will update with another patch when issue in NE10 gets fixed. Regards, Vish [1]:

Hi All, Changes from RFC v2 [1] armv7,armv8: Extend fixed fft NE10 optimizations to mdct - Overflow issue fixed by Phil at ARM. Ne10 wip at [2]. Should be upstream soon. - So, re-enabled using fixed fft for mdct_forward which was disabled in RFCv2 armv7,armv8: Optimize fixed point fft using NE10 library - Thanks to Jonathan Lennox, fixed some build fixes on iOS and some copy-paste errors Rest

Hello Timothy / Jean-Marc / opus-dev, This patch series is follow up on work I posted on [1]. In addition to what was posted on [1], this patch series mainly integrates Fixed point FFT implementations in NE10 library into opus. You can view my opus wip code at [2]. Note that while I found some issues both with the NE10 library(fixed fft) and with Linaro toolchain (armv8 intrinsics), the work

..._period, st->postfilter_period, overlap, -st->postfilter_gain, -st->postfilter_gain, - st->postfilter_tapset, st->postfilter_tapset, NULL, 0); + st->postfilter_tapset, st->postfilter_tapset, NULL, 0, st->arch); /* Simulate TDAC on the concealed audio so that it blends with the MDCT of the next frame. */ @@ -1011,11 +1011,11 @@ int celt_decode_with_ec(CELTDecoder * OPUS_RESTRICT st, const unsigned char *dat st->postfilter_period_old=IMAX(st->postfilter_period_old, COMBFILTER_MINPERIOD); com...

..._period, st->postfilter_period, overlap, -st->postfilter_gain, -st->postfilter_gain, - st->postfilter_tapset, st->postfilter_tapset, NULL, 0); + st->postfilter_tapset, st->postfilter_tapset, NULL, 0, st->arch); /* Simulate TDAC on the concealed audio so that it blends with the MDCT of the next frame. */ @@ -1011,11 +1011,11 @@ int celt_decode_with_ec(CELTDecoder * OPUS_RESTRICT st, const unsigned char *dat st->postfilter_period_old=IMAX(st->postfilter_period_old, COMBFILTER_MINPERIOD); com...

The attached patch cleans up Opus's x86 intrinsics configury. It: * Makes ?enable-intrinsics work with clang and other non-GCC compilers * Enables RTCD for the floating-point-mode SSE code in Celt. * Disables use of RTCD in cases where the compiler targets an instruction set by default. * Enables the SSE4.1 Silk optimizations that apply to the common parts of Silk when Opus is built in