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132 lines
3.5 KiB
C
132 lines
3.5 KiB
C
/*
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* optimized mixing code for i386
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*/
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#define MIX_AREAS_16 mix_areas_16
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#define MIX_AREAS_16_MMX mix_areas_16_mmx
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#define MIX_AREAS_32 mix_areas_32
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#define MIX_AREAS_24 mix_areas_24
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#define MIX_AREAS_24_CMOV mix_areas_24_cmov
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#define LOCK_PREFIX ""
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#define XADD "addl"
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#define XSUB "subl"
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#include "pcm_dmix_i386.h"
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#undef MIX_AREAS_16
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#undef MIX_AREAS_16_MMX
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#undef MIX_AREAS_32
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#undef MIX_AREAS_24
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#undef MIX_AREAS_24_CMOV
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#undef LOCK_PREFIX
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#undef XADD
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#undef XSUB
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#define MIX_AREAS_16 remix_areas_16
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#define MIX_AREAS_16_MMX remix_areas_16_mmx
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#define MIX_AREAS_32 remix_areas_32
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#define MIX_AREAS_24 remix_areas_24
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#define MIX_AREAS_24_CMOV remix_areas_24_cmov
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#define LOCK_PREFIX ""
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#define XADD "subl"
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#define XSUB "addl"
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#include "pcm_dmix_i386.h"
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#undef MIX_AREAS_16
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#undef MIX_AREAS_16_MMX
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#undef MIX_AREAS_32
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#undef MIX_AREAS_24
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#undef MIX_AREAS_24_CMOV
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#undef LOCK_PREFIX
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#undef XADD
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#undef XSUB
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#define MIX_AREAS_16 mix_areas_16_smp
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#define MIX_AREAS_16_MMX mix_areas_16_smp_mmx
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#define MIX_AREAS_32 mix_areas_32_smp
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#define MIX_AREAS_24 mix_areas_24_smp
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#define MIX_AREAS_24_CMOV mix_areas_24_smp_cmov
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#define LOCK_PREFIX "lock ; "
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#define XADD "addl"
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#define XSUB "subl"
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#include "pcm_dmix_i386.h"
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#undef MIX_AREAS_16
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#undef MIX_AREAS_16_MMX
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#undef MIX_AREAS_32
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#undef MIX_AREAS_24
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#undef MIX_AREAS_24_CMOV
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#undef LOCK_PREFIX
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#undef XADD
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#undef XSUB
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#define MIX_AREAS_16 remix_areas_16_smp
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#define MIX_AREAS_16_MMX remix_areas_16_smp_mmx
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#define MIX_AREAS_32 remix_areas_32_smp
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#define MIX_AREAS_24 remix_areas_24_smp
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#define MIX_AREAS_24_CMOV remix_areas_24_smp_cmov
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#define LOCK_PREFIX "lock ; "
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#define XADD "subl"
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#define XSUB "addl"
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#include "pcm_dmix_i386.h"
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#undef MIX_AREAS_16
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#undef MIX_AREAS_16_MMX
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#undef MIX_AREAS_32
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#undef MIX_AREAS_24
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#undef MIX_AREAS_24_CMOV
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#undef LOCK_PREFIX
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#undef XADD
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#undef XSUB
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#define i386_dmix_supported_format \
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((1ULL << SND_PCM_FORMAT_S16_LE) |\
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(1ULL << SND_PCM_FORMAT_S32_LE) |\
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(1ULL << SND_PCM_FORMAT_S24_3LE))
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#define dmix_supported_format \
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(i386_dmix_supported_format | generic_dmix_supported_format)
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static void mix_select_callbacks(snd_pcm_direct_t *dmix)
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{
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static int smp = 0, mmx = 0, cmov = 0;
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if (!((1ULL<< dmix->shmptr->s.format) & i386_dmix_supported_format)) {
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generic_mix_select_callbacks(dmix);
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return;
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}
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if (!smp) {
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FILE *in;
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char line[255];
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/* try to determine the capabilities of the 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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if (strstr(line, " cmov"))
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cmov = 1;
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}
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}
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fclose(in);
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}
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}
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if (mmx) {
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dmix->u.dmix.mix_areas_16 = smp > 1 ? mix_areas_16_smp_mmx : mix_areas_16_mmx;
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dmix->u.dmix.remix_areas_16 = smp > 1 ? remix_areas_16_smp_mmx : remix_areas_16_mmx;
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} else {
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dmix->u.dmix.mix_areas_16 = smp > 1 ? mix_areas_16_smp : mix_areas_16;
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dmix->u.dmix.remix_areas_16 = smp > 1 ? remix_areas_16_smp : remix_areas_16;
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}
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dmix->u.dmix.mix_areas_32 = smp > 1 ? mix_areas_32_smp : mix_areas_32;
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dmix->u.dmix.remix_areas_32 = smp > 1 ? remix_areas_32_smp : remix_areas_32;
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if (cmov) {
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dmix->u.dmix.mix_areas_24 = smp > 1 ? mix_areas_24_smp_cmov : mix_areas_24_cmov;
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dmix->u.dmix.remix_areas_24 = smp > 1 ? remix_areas_24_smp_cmov : remix_areas_24_cmov;
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} else {
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dmix->u.dmix.mix_areas_24 = smp > 1 ? mix_areas_24_smp: mix_areas_24;
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dmix->u.dmix.remix_areas_24 = smp > 1 ? remix_areas_24_smp: remix_areas_24;
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}
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}
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