1 /* 2 * optimized mixing code for x86-64 3 */ 4 5 #define MIX_AREAS_16 mix_areas_16 6 #define MIX_AREAS_32 mix_areas_32 7 #define MIX_AREAS_24 mix_areas_24 8 #define LOCK_PREFIX "" 9 #define XADD "addl" 10 #define XSUB "subl" 11 #include "pcm_dmix_x86_64.h" 12 #undef MIX_AREAS_16 13 #undef MIX_AREAS_32 14 #undef MIX_AREAS_24 15 #undef LOCK_PREFIX 16 #undef XADD 17 #undef XSUB 18 19 #define MIX_AREAS_16 remix_areas_16 20 #define MIX_AREAS_32 remix_areas_32 21 #define MIX_AREAS_24 remix_areas_24 22 #define LOCK_PREFIX "" 23 #define XADD "subl" 24 #define XSUB "addl" 25 #include "pcm_dmix_x86_64.h" 26 #undef MIX_AREAS_16 27 #undef MIX_AREAS_32 28 #undef MIX_AREAS_24 29 #undef LOCK_PREFIX 30 #undef XADD 31 #undef XSUB 32 33 #define MIX_AREAS_16 mix_areas_16_smp 34 #define MIX_AREAS_32 mix_areas_32_smp 35 #define MIX_AREAS_24 mix_areas_24_smp 36 #define LOCK_PREFIX "lock ; " 37 #define XADD "addl" 38 #define XSUB "subl" 39 #include "pcm_dmix_x86_64.h" 40 #undef MIX_AREAS_16 41 #undef MIX_AREAS_32 42 #undef MIX_AREAS_24 43 #undef LOCK_PREFIX 44 #undef XADD 45 #undef XSUB 46 47 #define MIX_AREAS_16 remix_areas_16_smp 48 #define MIX_AREAS_32 remix_areas_32_smp 49 #define MIX_AREAS_24 remix_areas_24_smp 50 #define LOCK_PREFIX "lock ; " 51 #define XADD "subl" 52 #define XSUB "addl" 53 #include "pcm_dmix_x86_64.h" 54 #undef MIX_AREAS_16 55 #undef MIX_AREAS_32 56 #undef MIX_AREAS_24 57 #undef LOCK_PREFIX 58 #undef XADD 59 #undef XSUB 60 61 #define x86_64_dmix_supported_format \ 62 ((1ULL << SND_PCM_FORMAT_S16_LE) |\ 63 (1ULL << SND_PCM_FORMAT_S32_LE) |\ 64 (1ULL << SND_PCM_FORMAT_S24_3LE)) 65 66 #define dmix_supported_format \ 67 (x86_64_dmix_supported_format | generic_dmix_supported_format) 68 mix_select_callbacks(snd_pcm_direct_t * dmix)69static void mix_select_callbacks(snd_pcm_direct_t *dmix) 70 { 71 static int smp = 0; 72 73 if (!dmix->direct_memory_access) { 74 generic_mix_select_callbacks(dmix); 75 return; 76 } 77 78 if (!((1ULL<< dmix->shmptr->s.format) & x86_64_dmix_supported_format)) { 79 generic_mix_select_callbacks(dmix); 80 return; 81 } 82 83 if (!smp) { 84 FILE *in; 85 char line[255]; 86 87 /* try to determine, if we have SMP */ 88 in = fopen("/proc/cpuinfo", "r"); 89 if (in) { 90 while (!feof(in)) { 91 fgets(line, sizeof(line), in); 92 if (!strncmp(line, "processor", 9)) 93 smp++; 94 } 95 fclose(in); 96 } 97 } 98 // printf("SMP: %i\n", smp); 99 dmix->u.dmix.mix_areas_16 = smp > 1 ? mix_areas_16_smp : mix_areas_16; 100 dmix->u.dmix.remix_areas_16 = smp > 1 ? remix_areas_16_smp : remix_areas_16; 101 dmix->u.dmix.mix_areas_32 = smp > 1 ? mix_areas_32_smp : mix_areas_32; 102 dmix->u.dmix.remix_areas_32 = smp > 1 ? remix_areas_32_smp : remix_areas_32; 103 dmix->u.dmix.mix_areas_24 = smp > 1 ? mix_areas_24_smp : mix_areas_24; 104 dmix->u.dmix.remix_areas_24 = smp > 1 ? remix_areas_24_smp : remix_areas_24; 105 } 106