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armv7(float): Optimize encode usecase using NE10 library

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Optimize opus encode (float only) usecase using ARM NE10
library. Mainly effects opus_fft and ctl_mdct_forward
and related functions.

This optimization can be used for ARM CPUs that have NEON
VFP unit. This patch only enables optimizations for ARMv7.

Official ARM NE10 library page available at
http://projectne10.github.io/Ne10/

To enable this optimization, use
--enable-intrinsics --with-NE10=<install_prefix>
or
--enable-intrinsics --with-NE10-libraries=<NE10_lib_dir> --with-NE10-includes=<NE10_includes_dir>

Compile time checks made during configure process to make sure
optimization option available only when compiler supports NEON
instrinsics.

Runtime checks made to make sure optimized functions only called
on appropriate hardware.

Signed-off-by: Timothy B. Terriberry <tterribe@xiph.org>
This commit is contained in:
Viswanath Puttagunta 2015-05-15 12:42:19 -05:00 • committed by Jean-Marc Valin
parent 0fe5143525
commit f48abe8308
31 changed files with 1492 additions and 143 deletions
Download patch file Download diff file Expand all files Collapse all files

9
src/opus_multistream_encoder.c
View file

@ -72,6 +72,7 @@ typedef void (*opus_copy_channel_in_func)(
struct OpusMSEncoder {
ChannelLayout layout;
int arch;
int lfe_stream;
int application;
int variable_duration;
@ -221,7 +222,7 @@ opus_val16 logSum(opus_val16 a, opus_val16 b)
#endif
void surround_analysis(const CELTMode *celt_mode, const void *pcm, opus_val16 *bandLogE, opus_val32 *mem, opus_val32 *preemph_mem,
int len, int overlap, int channels, int rate, opus_copy_channel_in_func copy_channel_in
int len, int overlap, int channels, int rate, opus_copy_channel_in_func copy_channel_in, int arch
)
{
int c;
@ -273,7 +274,8 @@ void surround_analysis(const CELTMode *celt_mode, const void *pcm, opus_val16 *b
}
}
#endif
clt_mdct_forward(&celt_mode->mdct, in, freq, celt_mode->window, overlap, celt_mode->maxLM-LM, 1);
clt_mdct_forward(&celt_mode->mdct, in, freq, celt_mode->window,
overlap, celt_mode->maxLM-LM, 1, arch);
if (upsample != 1)
{
int bound = len;
@ -427,6 +429,7 @@ static int opus_multistream_encoder_init_impl(
(streams<1) || (coupled_streams<0) || (streams>255-coupled_streams))
return OPUS_BAD_ARG;
st->arch = opus_select_arch();
st->layout.nb_channels = channels;
st->layout.nb_streams = streams;
st->layout.nb_coupled_streams = coupled_streams;
@ -783,7 +786,7 @@ static int opus_multistream_encode_native
ALLOC(bandSMR, 21*st->layout.nb_channels, opus_val16);
if (st->surround)
{
surround_analysis(celt_mode, pcm, bandSMR, mem, preemph_mem, frame_size, 120, st->layout.nb_channels, Fs, copy_channel_in);
surround_analysis(celt_mode, pcm, bandSMR, mem, preemph_mem, frame_size, 120, st->layout.nb_channels, Fs, copy_channel_in, st->arch);
}
/* Compute bitrate allocation between streams (this could be a lot better) */