[pulseaudio-discuss] [PATCH 01/13] cpu: Add force_generic_code flag to cpu_info struct
Peter Meerwald
pmeerw at pmeerw.net
Thu Apr 24 09:50:53 PDT 2014
From: Peter Meerwald <p.meerwald at bct-electronic.com>
The remapper and channel mixing code have (faster) specialized and (slower)
generic code certain code path. The flag force_generic_code can be set to
force the generic code path which is useful for testing. Code duplication
(such as in mix-special-test) can be avoided, cleanup patches follow.
Signed-off-by: Peter Meerwald <pmeerw at pmeerw.net>
---
src/Makefile.am | 2 +-
src/daemon/main.c | 4 +++-
src/pulsecore/cpu.c | 28 ++++++++++++++++++++++++++++
src/pulsecore/cpu.h | 5 +++++
src/pulsecore/mix.c | 8 ++++++++
src/pulsecore/remap.c | 13 +++++++++++++
6 files changed, 58 insertions(+), 2 deletions(-)
create mode 100644 src/pulsecore/cpu.c
diff --git a/src/Makefile.am b/src/Makefile.am
index 51ef690..634e26b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -897,7 +897,7 @@ libpulsecore_ at PA_MAJORMINOR@_la_SOURCES = \
pulsecore/rtpoll.c pulsecore/rtpoll.h \
pulsecore/stream-util.c pulsecore/stream-util.h \
pulsecore/mix.c pulsecore/mix.h \
- pulsecore/cpu.h \
+ pulsecore/cpu.c pulsecore/cpu.h \
pulsecore/cpu-arm.c pulsecore/cpu-arm.h \
pulsecore/cpu-x86.c pulsecore/cpu-x86.h \
pulsecore/cpu-orc.c pulsecore/cpu-orc.h \
diff --git a/src/daemon/main.c b/src/daemon/main.c
index 02a8ea6..74527be 100644
--- a/src/daemon/main.c
+++ b/src/daemon/main.c
@@ -1050,13 +1050,15 @@ int main(int argc, char *argv[]) {
#endif
c->cpu_info.cpu_type = PA_CPU_UNDEFINED;
+ c->cpu_info.force_generic_code = false; /* use generic, slow code */
if (!getenv("PULSE_NO_SIMD")) {
if (pa_cpu_init_x86(&(c->cpu_info.flags.x86)))
c->cpu_info.cpu_type = PA_CPU_X86;
- if (pa_cpu_init_arm(&(c->cpu_info.flags.arm)))
+ else if (pa_cpu_init_arm(&(c->cpu_info.flags.arm)))
c->cpu_info.cpu_type = PA_CPU_ARM;
pa_cpu_init_orc(c->cpu_info);
}
+ pa_cpu_init(c->cpu_info);
pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop)) == 0);
pa_signal_new(SIGINT, signal_callback, c);
diff --git a/src/pulsecore/cpu.c b/src/pulsecore/cpu.c
new file mode 100644
index 0000000..659bfdf
--- /dev/null
+++ b/src/pulsecore/cpu.c
@@ -0,0 +1,28 @@
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2014 Peter Meerwald <pmeerw at pmeerw.net>
+
+ PulseAudio 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.
+
+ PulseAudio 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
+ General Public License for more details.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "cpu.h"
+
+bool pa_cpu_init(pa_cpu_info cpu_info) {
+ pa_remap_func_init(cpu_info);
+ pa_mix_func_init(cpu_info);
+
+ return false;
+}
diff --git a/src/pulsecore/cpu.h b/src/pulsecore/cpu.h
index 7fe6f0b..9c931f7 100644
--- a/src/pulsecore/cpu.h
+++ b/src/pulsecore/cpu.h
@@ -40,6 +40,11 @@ struct pa_cpu_info {
pa_cpu_x86_flag_t x86;
pa_cpu_arm_flag_t arm;
} flags;
+ bool force_generic_code;
};
+bool pa_cpu_init(pa_cpu_info cpu_info);
+void pa_remap_func_init(pa_cpu_info cpu_info);
+void pa_mix_func_init(pa_cpu_info cpu_info);
+
#endif /* foocpuhfoo */
diff --git a/src/pulsecore/mix.c b/src/pulsecore/mix.c
index 4b789a6..f614138 100644
--- a/src/pulsecore/mix.c
+++ b/src/pulsecore/mix.c
@@ -32,6 +32,7 @@
#include <pulsecore/g711.h>
#include <pulsecore/endianmacros.h>
+#include "cpu.h"
#include "mix.h"
#define VOLUME_PADDING 32
@@ -609,6 +610,13 @@ static pa_do_mix_func_t do_mix_table[] = {
[PA_SAMPLE_S24_32RE] = (pa_do_mix_func_t) pa_mix_s24_32re_c
};
+void pa_mix_func_init(pa_cpu_info cpu_info) {
+ if (cpu_info.force_generic_code)
+ do_mix_table[PA_SAMPLE_S16NE] = (pa_do_mix_func_t) pa_mix_generic_s16ne;
+ else
+ do_mix_table[PA_SAMPLE_S16NE] = (pa_do_mix_func_t) pa_mix_s16ne_c;
+}
+
size_t pa_mix(
pa_mix_info streams[],
unsigned nstreams,
diff --git a/src/pulsecore/remap.c b/src/pulsecore/remap.c
index adff2a5..a62ec91 100644
--- a/src/pulsecore/remap.c
+++ b/src/pulsecore/remap.c
@@ -32,6 +32,7 @@
#include <pulsecore/log.h>
#include <pulsecore/macro.h>
+#include "cpu.h"
#include "remap.h"
static void remap_mono_to_stereo_s16ne_c(pa_remap_t *m, int16_t *dst, const int16_t *src, unsigned n) {
@@ -342,6 +343,8 @@ void pa_set_remap_func(pa_remap_t *m, pa_do_remap_func_t func_s16,
pa_assert_not_reached();
}
+static bool force_generic_code = false;
+
/* set the function that will execute the remapping based on the matrices */
static void init_remap_c(pa_remap_t *m) {
unsigned n_oc, n_ic;
@@ -351,6 +354,12 @@ static void init_remap_c(pa_remap_t *m) {
n_ic = m->i_ss.channels;
/* find some common channel remappings, fall back to full matrix operation. */
+ if (force_generic_code) {
+ pa_log_info("Forced to use generic matrix remapping");
+ pa_set_remap_func(m, remap_channels_matrix_s16ne_c, remap_channels_matrix_float32ne_c);
+ return;
+ }
+
if (n_ic == 1 && n_oc == 2 &&
m->map_table_i[0][0] == 0x10000 && m->map_table_i[1][0] == 0x10000) {
@@ -423,3 +432,7 @@ pa_init_remap_func_t pa_get_init_remap_func(void) {
void pa_set_init_remap_func(pa_init_remap_func_t func) {
init_remap_func = func;
}
+
+void pa_remap_func_init(pa_cpu_info cpu_info) {
+ force_generic_code = cpu_info.force_generic_code;
+}
--
1.7.9.5
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