diff options
author | Ben Avison <bavison@riscosopen.org> | 2014-03-20 18:58:35 +0000 |
---|---|---|
committer | Martin Storsjö <martin@martin.st> | 2014-03-26 19:53:52 +0200 |
commit | 15a29c39d9ef15b0783c04b3228e1c55f6701ee3 (patch) | |
tree | 6ace9df03c34b3d4eaa4147a0facd3fd9fe225b1 /libavcodec/arm/mlpdsp_init_arm.c | |
parent | efc7290eb668ce77ef28d0ab9958024d0a35fbe8 (diff) |
truehd: add hand-scheduled ARM asm version of mlp_filter_channel.
Profiling results for overall audio decode and the mlp_filter_channel(_arm)
function in particular are as follows:
Before After
Mean StdDev Mean StdDev Confidence Change
6:2 total 380.4 22.0 370.8 17.0 87.4% +2.6% (insignificant)
6:2 function 60.7 7.2 36.6 8.1 100.0% +65.8%
8:2 total 357.0 17.5 343.2 19.0 97.8% +4.0% (insignificant)
8:2 function 60.3 8.8 37.3 3.8 100.0% +61.8%
6:6 total 717.2 23.2 658.4 15.7 100.0% +8.9%
6:6 function 140.4 12.9 81.5 9.2 100.0% +72.4%
8:8 total 981.9 16.2 896.2 24.5 100.0% +9.6%
8:8 function 193.4 15.0 103.3 11.5 100.0% +87.2%
Experiments with adding preload instructions to this function yielded no
useful benefit, so these have not been included.
The assembly version has also been tested with a fuzz tester to ensure that
any combinations of inputs not exercised by my available test streams still
generate mathematically identical results to the C version.
Signed-off-by: Martin Storsjö <martin@martin.st>
Diffstat (limited to 'libavcodec/arm/mlpdsp_init_arm.c')
-rw-r--r-- | libavcodec/arm/mlpdsp_init_arm.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/libavcodec/arm/mlpdsp_init_arm.c b/libavcodec/arm/mlpdsp_init_arm.c new file mode 100644 index 0000000000..4e8f44f557 --- /dev/null +++ b/libavcodec/arm/mlpdsp_init_arm.c @@ -0,0 +1,40 @@ +/* + * Copyright (c) 2014 RISC OS Open Ltd + * Author: Ben Avison <bavison@riscosopen.org> + * + * This file is part of Libav. + * + * Libav is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * Libav is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <stdint.h> + +#include "libavutil/arm/cpu.h" +#include "libavutil/attributes.h" +#include "libavcodec/mlpdsp.h" + +void ff_mlp_filter_channel_arm(int32_t *state, const int32_t *coeff, + int firorder, int iirorder, + unsigned int filter_shift, int32_t mask, + int blocksize, int32_t *sample_buffer); + +av_cold void ff_mlpdsp_init_arm(MLPDSPContext *c) +{ + int cpu_flags = av_get_cpu_flags(); + + if (have_armv5te(cpu_flags)) { + c->mlp_filter_channel = ff_mlp_filter_channel_arm; + } +} |