mirror of
https://github.com/alsa-project/alsa-lib.git
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Split arch-dependent codes of dmix
Split arch-dependent codes of dmix to separate files.
This commit is contained in:
Takashi Iwai
parent
c92969845d
commit
22846c486f
5 changed files with 220 additions and 166 deletions
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@ -12,6 +12,9 @@ libpcm_la_SOURCES = atomic.c mask.c interval.c \
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pcm_meter.c pcm_hooks.c pcm_lfloat.c pcm_ladspa.c \
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pcm_direct.c pcm_dmix.c pcm_dsnoop.c pcm_dshare.c \
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pcm_asym.c pcm_iec958.c pcm_softvol.c pcm_symbols.c
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EXTRA_SOURCES = pcm_dmix_i386.c pcm_dmix_x86_64.c pcm_dmix_generic.c
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noinst_HEADERS = pcm_local.h pcm_plugin.h mask.h mask_inline.h \
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interval.h interval_inline.h plugin_ops.h ladspa.h \
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pcm_direct.h pcm_dmix_i386.h pcm_dmix_x86_64.h \
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@ -121,172 +121,12 @@ static void dmix_server_free(snd_pcm_direct_t *dmix)
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* FIXME: optimize it for different architectures
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*/
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#ifdef __i386__
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#define ADD_AND_SATURATE
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#define MIX_AREAS1 mix_areas1
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#define MIX_AREAS1_MMX mix_areas1_mmx
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#define MIX_AREAS2 mix_areas2
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#define LOCK_PREFIX ""
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#include "pcm_dmix_i386.h"
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#undef MIX_AREAS1
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#undef MIX_AREAS1_MMX
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#undef MIX_AREAS2
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#undef LOCK_PREFIX
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#define MIX_AREAS1 mix_areas1_smp
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#define MIX_AREAS1_MMX mix_areas1_smp_mmx
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#define MIX_AREAS2 mix_areas2_smp
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#define LOCK_PREFIX "lock ; "
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#include "pcm_dmix_i386.h"
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#undef MIX_AREAS1
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#undef MIX_AREAS1_MMX
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#undef MIX_AREAS2
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#undef LOCK_PREFIX
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static void mix_select_callbacks(snd_pcm_direct_t *dmix)
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{
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FILE *in;
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char line[255];
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int smp = 0, mmx = 0;
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/* try to determine, if we have a MMX capable CPU */
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in = fopen("/proc/cpuinfo", "r");
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if (in) {
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while (!feof(in)) {
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fgets(line, sizeof(line), in);
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if (!strncmp(line, "processor", 9))
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smp++;
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else if (!strncmp(line, "flags", 5)) {
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if (strstr(line, " mmx"))
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mmx = 1;
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}
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}
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fclose(in);
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}
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// printf("MMX: %i, SMP: %i\n", mmx, smp);
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if (mmx) {
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dmix->u.dmix.mix_areas1 = smp > 1 ? mix_areas1_smp_mmx : mix_areas1_mmx;
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} else {
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dmix->u.dmix.mix_areas1 = smp > 1 ? mix_areas1_smp : mix_areas1;
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}
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dmix->u.dmix.mix_areas2 = smp > 1 ? mix_areas2_smp : mix_areas2;
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}
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#endif
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#ifdef __x86_64__
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#define ADD_AND_SATURATE
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#define MIX_AREAS1 mix_areas1
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#define MIX_AREAS2 mix_areas2
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#define LOCK_PREFIX ""
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#include "pcm_dmix_x86_64.h"
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#undef MIX_AREAS1
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#undef MIX_AREAS2
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#undef LOCK_PREFIX
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#define MIX_AREAS1 mix_areas1_smp
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#define MIX_AREAS2 mix_areas2_smp
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#define LOCK_PREFIX "lock ; "
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#include "pcm_dmix_x86_64.h"
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#undef MIX_AREAS1
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#undef MIX_AREAS2
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#undef LOCK_PREFIX
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static void mix_select_callbacks(snd_pcm_direct_t *dmix)
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{
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FILE *in;
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char line[255];
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int smp = 0;
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/* try to determine, if we have SMP */
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in = fopen("/proc/cpuinfo", "r");
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if (in) {
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while (!feof(in)) {
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fgets(line, sizeof(line), in);
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if (!strncmp(line, "processor", 9))
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smp++;
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}
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fclose(in);
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}
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// printf("SMP: %i\n", smp);
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dmix->u.dmix.mix_areas1 = smp > 1 ? mix_areas1_smp : mix_areas1;
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dmix->u.dmix.mix_areas2 = smp > 1 ? mix_areas2_smp : mix_areas2;
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}
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#endif
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#ifndef ADD_AND_SATURATE
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#warning Please, recode mix_areas1() routine to your architecture...
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static void mix_areas1(unsigned int size,
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volatile signed short *dst, signed short *src,
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volatile signed int *sum, size_t dst_step,
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size_t src_step, size_t sum_step)
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{
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register signed int sample, old_sample;
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for (;;) {
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sample = *src;
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old_sample = *sum;
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if (*dst == 0)
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sample -= old_sample;
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*sum += sample;
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do {
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old_sample = *sum;
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if (old_sample > 0x7fff)
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sample = 0x7fff;
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else if (old_sample < -0x8000)
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sample = -0x8000;
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else
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sample = old_sample;
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*dst = sample;
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} while (*sum != old_sample);
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if (!--size)
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return;
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((char *)src) += src_step;
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((char *)dst) += dst_step;
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((char *)sum) += sum_step;
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}
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}
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#warning Please, recode mix_areas2() routine to your architecture...
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static void mix_areas2(unsigned int size,
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volatile signed int *dst, signed int *src,
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volatile signed int *sum, size_t dst_step,
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size_t src_step, size_t sum_step)
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{
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register signed int sample, old_sample;
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for (;;) {
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sample = *src / 256;
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old_sample = *sum;
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if (*dst == 0)
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sample -= old_sample;
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*sum += sample;
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do {
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old_sample = *sum;
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if (old_sample > 0x7fffff)
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sample = 0x7fffffff;
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else if (old_sample < -0x800000)
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sample = -0x80000000;
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else
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sample = old_sample * 256;
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*dst = sample;
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} while (*sum != old_sample);
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if (!--size)
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return;
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((char *)src) += src_step;
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((char *)dst) += dst_step;
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((char *)sum) += sum_step;
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}
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}
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static void mix_select_callbacks(snd_pcm_direct_t *dmix)
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{
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dmix->u.dmix.mix_areas1 = mix_areas1;
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dmix->u.dmix.mix_areas2 = mix_areas2;
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}
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#if defined(__i386__)
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#include "pcm_dmix_i386.c"
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#elif defined(__x86_64__)
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#include "pcm_dmix_x86_64.c"
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#else
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#include "pcm_dmix_generic.c"
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#endif
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static void mix_areas(snd_pcm_direct_t *dmix,
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119
src/pcm/pcm_dmix_generic.c
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119
src/pcm/pcm_dmix_generic.c
Normal file
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@ -0,0 +1,119 @@
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#if defined(__i386__) || defined(__x86_64__)
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#define LOCK_PREFIX "lock ; "
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#define ARCH_ADD(p,a) \
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__asm__ __volatile__(LOCK_PREFIX "addl %1,%0" \
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:"=m" (*p) \
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:"ir" (a), "m" (*p))
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struct __xchg_dummy { unsigned long a[100]; };
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#define __xg(x) ((struct __xchg_dummy *)(x))
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static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
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unsigned long new, int size)
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{
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unsigned long prev;
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switch (size) {
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case 1:
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__asm__ __volatile__(LOCK_PREFIX "cmpxchgb %b1,%2"
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: "=a"(prev)
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: "q"(new), "m"(*__xg(ptr)), "0"(old)
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: "memory");
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return prev;
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case 2:
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__asm__ __volatile__(LOCK_PREFIX "cmpxchgw %w1,%2"
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: "=a"(prev)
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: "q"(new), "m"(*__xg(ptr)), "0"(old)
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: "memory");
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return prev;
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case 4:
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__asm__ __volatile__(LOCK_PREFIX "cmpxchgl %1,%2"
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: "=a"(prev)
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: "q"(new), "m"(*__xg(ptr)), "0"(old)
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: "memory");
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return prev;
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}
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return old;
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}
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#define ARCH_CMPXCHG(ptr,o,n)\
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((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
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(unsigned long)(n),sizeof(*(ptr))))
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#endif
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#ifndef ARCH_ADD
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#warning Please, define atomic ADD and CMPXCHG for your architecture...
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#define ARCH_ADD(p,a) (*(p) += (a))
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#define ARCH_CMPXCHG(p,a,b) (*(p)) /* fake */
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#endif
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static void mix_areas1(unsigned int size,
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volatile signed short *dst, signed short *src,
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volatile signed int *sum, size_t dst_step,
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size_t src_step, size_t sum_step)
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{
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register signed int sample, old_sample;
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src_step /= sizeof(*src);
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dst_step /= sizeof(*dst);
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sum_step /= sizeof(*sum);
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for (;;) {
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sample = *src;
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old_sample = *sum;
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if (ARCH_CMPXCHG(dst, 0, 1) == 0)
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sample -= old_sample;
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ARCH_ADD(sum, sample);
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do {
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old_sample = *sum;
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if (old_sample > 0x7fff)
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sample = 0x7fff;
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else if (old_sample < -0x8000)
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sample = -0x8000;
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else
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sample = old_sample;
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*dst = sample;
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} while (*sum != old_sample);
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if (!--size)
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return;
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src += src_step;
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dst += dst_step;
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sum += sum_step;
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}
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}
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static void mix_areas2(unsigned int size,
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volatile signed int *dst, signed int *src,
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volatile signed int *sum, size_t dst_step,
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size_t src_step, size_t sum_step)
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{
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register signed int sample, old_sample;
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src_step /= sizeof(*src);
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dst_step /= sizeof(*dst);
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sum_step /= sizeof(*sum);
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for (;;) {
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sample = *src / 256;
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old_sample = *sum;
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if (ARCH_CMPXCHG(dst, 0, 1) == 0)
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sample -= old_sample;
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ARCH_ADD(sum, sample);
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do {
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old_sample = *sum;
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if (old_sample > 0x7fffff)
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sample = 0x7fffffff;
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else if (old_sample < -0x800000)
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sample = -0x80000000;
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else
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sample = old_sample * 256;
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*dst = sample;
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} while (*sum != old_sample);
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if (!--size)
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return;
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src += src_step;
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dst += dst_step;
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sum += sum_step;
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}
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}
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static void mix_select_callbacks(snd_pcm_direct_t *dmix)
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{
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dmix->u.dmix.mix_areas1 = mix_areas1;
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dmix->u.dmix.mix_areas2 = mix_areas2;
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}
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52
src/pcm/pcm_dmix_i386.c
Normal file
52
src/pcm/pcm_dmix_i386.c
Normal file
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@ -0,0 +1,52 @@
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/*
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* optimized mixing code for i386
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*/
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#define MIX_AREAS1 mix_areas1
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#define MIX_AREAS1_MMX mix_areas1_mmx
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#define MIX_AREAS2 mix_areas2
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#define LOCK_PREFIX ""
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#include "pcm_dmix_i386.h"
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#undef MIX_AREAS1
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#undef MIX_AREAS1_MMX
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#undef MIX_AREAS2
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#undef LOCK_PREFIX
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#define MIX_AREAS1 mix_areas1_smp
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#define MIX_AREAS1_MMX mix_areas1_smp_mmx
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#define MIX_AREAS2 mix_areas2_smp
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#define LOCK_PREFIX "lock ; "
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#include "pcm_dmix_i386.h"
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#undef MIX_AREAS1
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#undef MIX_AREAS1_MMX
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#undef MIX_AREAS2
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#undef LOCK_PREFIX
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static void mix_select_callbacks(snd_pcm_direct_t *dmix)
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{
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FILE *in;
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char line[255];
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int smp = 0, mmx = 0;
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/* try to determine, if we have a MMX capable CPU */
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in = fopen("/proc/cpuinfo", "r");
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if (in) {
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while (!feof(in)) {
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fgets(line, sizeof(line), in);
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if (!strncmp(line, "processor", 9))
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smp++;
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else if (!strncmp(line, "flags", 5)) {
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if (strstr(line, " mmx"))
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mmx = 1;
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}
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}
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fclose(in);
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}
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// printf("MMX: %i, SMP: %i\n", mmx, smp);
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if (mmx) {
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dmix->u.dmix.mix_areas1 = smp > 1 ? mix_areas1_smp_mmx : mix_areas1_mmx;
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} else {
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dmix->u.dmix.mix_areas1 = smp > 1 ? mix_areas1_smp : mix_areas1;
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}
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dmix->u.dmix.mix_areas2 = smp > 1 ? mix_areas2_smp : mix_areas2;
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}
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40
src/pcm/pcm_dmix_x86_64.c
Normal file
40
src/pcm/pcm_dmix_x86_64.c
Normal file
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@ -0,0 +1,40 @@
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/*
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* optimized mixing code for x86-64
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*/
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#define MIX_AREAS1 mix_areas1
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#define MIX_AREAS2 mix_areas2
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#define LOCK_PREFIX ""
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#include "pcm_dmix_x86_64.h"
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#undef MIX_AREAS1
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#undef MIX_AREAS2
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#undef LOCK_PREFIX
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#define MIX_AREAS1 mix_areas1_smp
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#define MIX_AREAS2 mix_areas2_smp
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#define LOCK_PREFIX "lock ; "
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#include "pcm_dmix_x86_64.h"
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#undef MIX_AREAS1
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#undef MIX_AREAS2
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#undef LOCK_PREFIX
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static void mix_select_callbacks(snd_pcm_direct_t *dmix)
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{
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FILE *in;
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char line[255];
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int smp = 0;
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/* try to determine, if we have SMP */
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in = fopen("/proc/cpuinfo", "r");
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if (in) {
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while (!feof(in)) {
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fgets(line, sizeof(line), in);
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if (!strncmp(line, "processor", 9))
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smp++;
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}
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fclose(in);
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}
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// printf("SMP: %i\n", smp);
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dmix->u.dmix.mix_areas1 = smp > 1 ? mix_areas1_smp : mix_areas1;
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dmix->u.dmix.mix_areas2 = smp > 1 ? mix_areas2_smp : mix_areas2;
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}
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