On 2024/05/01 21:04, Jan Stary wrote: > On May 01 11:00:12, s...@spacehopper.org wrote: > > On 2024/05/01 11:21, Jan Stary wrote: > > > Hi, > > > > > > On Apr 26 20:46:51, b...@comstyle.com wrote: > > > > Implement SSE2 lrint() and lrintf() on amd64. > > > > > > I don't think this is worth the added complexity: > > > seven more patches to have a different lrint()? > > > Does it make the resampling noticably better/faster? > > > > Playing with the benchmark mentioned in > > https://github.com/libsndfile/libsamplerate/issues/187 > > suggests that it's going to be *hugely* faster with clang (and a bit > > faster with gcc). > > This talks about a MSVC build compared to a MinGW64 build on windows. > Is that also relevant to an AMD64 build on OpenBSD? I just rebuilt > with the diff - what would be a good way to test the actual performance > before and after?
oh, actually it was the bench in the linked PR that I played with, https://github.com/libsndfile/libsndfile/pull/663 -> https://quick-bench.com/q/OabKT-gEOZ8CYDriy1JEwq1lEsg where there's a huge difference in clang builds. On 2024/05/01 22:14, Jan Stary wrote: > > what would be a good way to test the actual performance before and after? any suggestions Brad? > OK, here's a naive example: using SRC_LINEAR, > convert 4 hours of silence from 48000 to 44100. > > Before: > > 0m17.23s real 0m11.63s user 0m03.52s system > 0m17.03s real 0m11.35s user 0m03.58s system > 0m17.55s real 0m11.68s user 0m03.72s system > > After: > > 0m17.98s real 0m12.40s user 0m03.41s system > 0m17.98s real 0m12.13s user 0m03.78s system > 0m18.10s real 0m12.44s user 0m03.57s system > > Same thing with four hours worth of a sine wave: > > Before: > > 0m29.87s real 0m24.28s user 0m03.42s system > 0m29.85s real 0m23.79s user 0m03.77s system > 0m29.75s real 0m24.28s user 0m03.21s system > > After: > > 0m30.54s real 0m24.91s user 0m03.55s system > 0m30.51s real 0m24.70s user 0m03.64s system > 0m30.65s real 0m24.91s user 0m03.44s system > > This is an amd64 machine using clang 16.0.6 > Is my test naive? Am I missing something? > (How much lrintf gets used inside this?) > > Jan > > > > OpenBSD 7.5-current (GENERIC.MP) #34: Sat Apr 27 21:19:57 MDT 2024 > dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP > real mem = 8285454336 (7901MB) > avail mem = 8013254656 (7642MB) > random: good seed from bootblocks > mpath0 at root > scsibus0 at mpath0: 256 targets > mainbus0 at root > bios0 at mainbus0: SMBIOS rev. 2.4 @ 0xf0100 (36 entries) > bios0: vendor Award Software International, Inc. version "F3" date 03/31/2011 > bios0: Gigabyte Technology Co., Ltd. H67MA-USB3-B3 > acpi0 at bios0: ACPI 1.0 > acpi0: sleep states S0 S3 S4 S5 > acpi0: tables DSDT FACP HPET MCFG ASPT SSPT EUDS MATS TAMG APIC SSDT > acpi0: wakeup devices PCI0(S5) PEX0(S5) PEX1(S5) PEX2(S5) PEX3(S5) PEX4(S5) > PEX5(S5) PEX6(S5) PEX7(S5) HUB0(S5) UAR1(S3) USBE(S3) USE2(S3) AZAL(S5) > acpitimer0 at acpi0: 3579545 Hz, 24 bits > acpihpet0 at acpi0: 14318179 Hz > acpimcfg0 at acpi0 > acpimcfg0: addr 0xf4000000, bus 0-63 > acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat > cpu0 at mainbus0: apid 0 (boot processor) > cpu0: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz, 3492.09 MHz, 06-2a-07, patch > 0000002f > cpu0: > FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN > cpu0: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB > 64b/line 8-way L2 cache, 8MB 64b/line 16-way L3 cache > cpu0: smt 0, core 0, package 0 > mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges > cpu0: apic clock running at 99MHz > cpu0: mwait min=64, max=64, C-substates=0.2.1.1, IBE > cpu1 at mainbus0: apid 2 (application processor) > cpu1: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz, 3492.12 MHz, 06-2a-07, patch > 0000002f > cpu1: > FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN > cpu1: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB > 64b/line 8-way L2 cache, 8MB 64b/line 16-way L3 cache > cpu1: smt 0, core 1, package 0 > cpu2 at mainbus0: apid 4 (application processor) > cpu2: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz, 3492.19 MHz, 06-2a-07, patch > 0000002f > cpu2: > FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN > cpu2: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB > 64b/line 8-way L2 cache, 8MB 64b/line 16-way L3 cache > cpu2: smt 0, core 2, package 0 > cpu3 at mainbus0: apid 6 (application processor) > cpu3: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz, 3492.25 MHz, 06-2a-07, patch > 0000002f > cpu3: > FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN > cpu3: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB > 64b/line 8-way L2 cache, 8MB 64b/line 16-way L3 cache > cpu3: smt 0, core 3, package 0 > cpu4 at mainbus0: apid 1 (application processor) > cpu4: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz, 3492.21 MHz, 06-2a-07, patch > 0000002f > cpu4: > FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN > cpu4: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB > 64b/line 8-way L2 cache, 8MB 64b/line 16-way L3 cache > cpu4: smt 1, core 0, package 0 > cpu5 at mainbus0: apid 3 (application processor) > cpu5: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz, 3492.33 MHz, 06-2a-07, patch > 0000002f > cpu5: > FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN > cpu5: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB > 64b/line 8-way L2 cache, 8MB 64b/line 16-way L3 cache > cpu5: smt 1, core 1, package 0 > cpu6 at mainbus0: apid 5 (application processor) > cpu6: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz, 3492.25 MHz, 06-2a-07, patch > 0000002f > cpu6: > FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN > cpu6: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB > 64b/line 8-way L2 cache, 8MB 64b/line 16-way L3 cache > cpu6: smt 1, core 2, package 0 > cpu7 at mainbus0: apid 7 (application processor) > cpu7: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz, 3492.37 MHz, 06-2a-07, patch > 0000002f > cpu7: > FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN > cpu7: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB > 64b/line 8-way L2 cache, 8MB 64b/line 16-way L3 cache > cpu7: smt 1, core 3, package 0 > ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 24 pins, remapped > acpiprt0 at acpi0: bus 0 (PCI0) > acpiprt1 at acpi0: bus 1 (PEG0) > acpiprt2 at acpi0: bus -1 (PEG1) > acpiprt3 at acpi0: bus 2 (PEX0) > acpiprt4 at acpi0: bus -1 (PEX1) > acpiprt5 at acpi0: bus -1 (PEX2) > acpiprt6 at acpi0: bus -1 (PEX3) > acpiprt7 at acpi0: bus 3 (PEX4) > acpiprt8 at acpi0: bus 4 (PEX5) > acpiprt9 at acpi0: bus 5 (PEX6) > acpiprt10 at acpi0: bus 6 (PEX7) > acpibtn0 at acpi0: PWRB > acpipci0 at acpi0 PCI0 > acpicmos0 at acpi0 > com0 at acpi0 UAR1 addr 0x3f8/0x8 irq 4: ns16550a, 16 byte fifo > acpicpu0 at acpi0: C3(350@96 mwait.1@0x20), C2(500@64 mwait.1@0x10), > C1(1000@1 mwait.1), PSS > acpicpu1 at acpi0: C3(350@96 mwait.1@0x20), C2(500@64 mwait.1@0x10), > C1(1000@1 mwait.1), PSS > acpicpu2 at acpi0: C3(350@96 mwait.1@0x20), C2(500@64 mwait.1@0x10), > C1(1000@1 mwait.1), PSS > acpicpu3 at acpi0: C3(350@96 mwait.1@0x20), C2(500@64 mwait.1@0x10), > C1(1000@1 mwait.1), PSS > acpicpu4 at acpi0: C3(350@96 mwait.1@0x20), C2(500@64 mwait.1@0x10), > C1(1000@1 mwait.1), PSS > acpicpu5 at acpi0: C3(350@96 mwait.1@0x20), C2(500@64 mwait.1@0x10), > C1(1000@1 mwait.1), PSS > acpicpu6 at acpi0: C3(350@96 mwait.1@0x20), C2(500@64 mwait.1@0x10), > C1(1000@1 mwait.1), PSS > acpicpu7 at acpi0: C3(350@96 mwait.1@0x20), C2(500@64 mwait.1@0x10), > C1(1000@1 mwait.1), PSS > cpu0: using VERW MDS workaround (except on vmm entry) > cpu0: Enhanced SpeedStep 3492 MHz: speeds: 3701, 3700, 3600, 3500, 3400, > 3300, 3200, 3100, 3000, 2900, 2800, 2700, 2600, 2500, 2400, 2300, 2200, 2100, > 1600 MHz > pci0 at mainbus0 bus 0 > pchb0 at pci0 dev 0 function 0 "Intel Core 2G Host" rev 0x09 > ppb0 at pci0 dev 1 function 0 "Intel Core 2G PCIE" rev 0x09: apic 2 int 16 > pci1 at ppb0 bus 1 > nvme0 at pci1 dev 0 function 0 vendor "Kingston", unknown product 0x5017 rev > 0x03: apic 2 int 16, NVMe 1.4 > nvme0: KINGSTON SNV2S2000G, firmware SBM02103, serial 50026B76861D2EE0 > scsibus1 at nvme0: 2 targets, initiator 0 > sd0 at scsibus1 targ 1 lun 0: <NVMe, KINGSTON SNV2S20, SBM0> > sd0: 1907729MB, 512 bytes/sector, 3907029168 sectors > inteldrm0 at pci0 dev 2 function 0 "Intel HD Graphics 2000" rev 0x09 > drm0 at inteldrm0 > inteldrm0: apic 2 int 16, SANDYBRIDGE, gen 6 > "Intel 6 Series MEI" rev 0x04 at pci0 dev 22 function 0 not configured > ehci0 at pci0 dev 26 function 0 "Intel 6 Series USB" rev 0x05: apic 2 int 18 > usb0 at ehci0: USB revision 2.0 > uhub0 at usb0 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 > addr 1 > azalia0 at pci0 dev 27 function 0 "Intel 6 Series HD Audio" rev 0x05: apic 2 > int 22 > azalia0: codecs: Realtek ALC889, Intel/0x2805, using Realtek ALC889 > audio0 at azalia0 > ppb1 at pci0 dev 28 function 0 "Intel 6 Series PCIE" rev 0xb5: apic 2 int 16 > pci2 at ppb1 bus 2 > ppb2 at pci0 dev 28 function 4 "Intel 6 Series PCIE" rev 0xb5: apic 2 int 16 > pci3 at ppb2 bus 3 > nvme1 at pci3 dev 0 function 0 vendor "Kingston", unknown product 0x5017 rev > 0x03: apic 2 int 16, NVMe 1.4 > nvme1: KINGSTON SNV2S2000G, firmware SBM02103, serial 50026B768680E52A > scsibus2 at nvme1: 2 targets, initiator 0 > sd1 at scsibus2 targ 1 lun 0: <NVMe, KINGSTON SNV2S20, SBM0> > sd1: 1907729MB, 512 bytes/sector, 3907029168 sectors > ppb3 at pci0 dev 28 function 5 "Intel 6 Series PCIE" rev 0xb5: apic 2 int 17 > pci4 at ppb3 bus 4 > nvme2 at pci4 dev 0 function 0 "Intel NVMe" rev 0x03: apic 2 int 17, NVMe 1.3 > nvme2: INTEL SSDPEKNW512G8, firmware 002C, serial PHNH9323049T512A > scsibus3 at nvme2: 2 targets, initiator 0 > sd2 at scsibus3 targ 1 lun 0: <NVMe, INTEL SSDPEKNW51, 002C> > sd2: 488386MB, 512 bytes/sector, 1000215216 sectors > ppb4 at pci0 dev 28 function 6 "Intel 6 Series PCIE" rev 0xb5: apic 2 int 18 > pci5 at ppb4 bus 5 > re0 at pci5 dev 0 function 0 "Realtek 8168" rev 0x06: RTL8168E/8111E-VL > (0x2c80), apic 2 int 18, address 50:e5:49:36:ec:0d > rgephy0 at re0 phy 7: RTL8169S/8110S/8211 PHY, rev. 5 > ppb5 at pci0 dev 28 function 7 "Intel 6 Series PCIE" rev 0xb5: apic 2 int 19 > pci6 at ppb5 bus 6 > xhci0 at pci6 dev 0 function 0 "Etron EJ168 xHCI" rev 0x01: apic 2 int 19, > xHCI 1.0 > usb1 at xhci0: USB revision 3.0 > uhub1 at usb1 configuration 1 interface 0 "Etron xHCI root hub" rev 3.00/1.00 > addr 1 > ehci1 at pci0 dev 29 function 0 "Intel 6 Series USB" rev 0x05: apic 2 int 23 > usb2 at ehci1: USB revision 2.0 > uhub2 at usb2 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 > addr 1 > ppb6 at pci0 dev 30 function 0 "Intel 82801BA Hub-to-PCI" rev 0xa5 > pci7 at ppb6 bus 7 > pcib0 at pci0 dev 31 function 0 "Intel H67 LPC" rev 0x05 > ahci0 at pci0 dev 31 function 2 "Intel 6 Series AHCI" rev 0x05: apic 2 int > 19, AHCI 1.3 > ahci0: port 0: 6.0Gb/s > ahci0: port 2: 3.0Gb/s > ahci0: port 4: 3.0Gb/s > scsibus4 at ahci0: 32 targets > sd3 at scsibus4 targ 0 lun 0: <ATA, SanDisk SD7SN3Q0, X217> > naa.5001b44c52e5d2a1 > sd3: 61057MB, 512 bytes/sector, 125045424 sectors, thin > sd4 at scsibus4 targ 2 lun 0: <ATA, ST2000DM008-2FR1, 0001> > naa.5000c500c128f41c > sd4: 1907729MB, 512 bytes/sector, 3907029168 sectors, thin > sd5 at scsibus4 targ 4 lun 0: <ATA, KINGSTON SA400S3, S340> > naa.50026b7381124414 > sd5: 915715MB, 512 bytes/sector, 1875385008 sectors, thin > ichiic0 at pci0 dev 31 function 3 "Intel 6 Series SMBus" rev 0x05: apic 2 int > 18 > iic0 at ichiic0 > spdmem0 at iic0 addr 0x50: 4GB DDR3 SDRAM PC3-12800 > spdmem1 at iic0 addr 0x52: 4GB DDR3 SDRAM PC3-12800 > isa0 at pcib0 > isadma0 at isa0 > pckbc0 at isa0 port 0x60/5 irq 1 irq 12 > pcppi0 at isa0 port 0x61 > spkr0 at pcppi0 > it0 at isa0 port 0x2e/2: IT8728F rev 1, EC port 0x290 > vmm0 at mainbus0: VMX/EPT > uhub3 at uhub0 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" > rev 2.00/0.00 addr 2 > uhidev0 at uhub3 port 5 configuration 1 interface 0 "Logitech USB Keyboard" > rev 1.10/64.00 addr 3 > uhidev0: iclass 3/1 > ukbd0 at uhidev0: 8 variable keys, 6 key codes > wskbd0 at ukbd0: console keyboard > uhidev1 at uhub3 port 5 configuration 1 interface 1 "Logitech USB Keyboard" > rev 1.10/64.00 addr 3 > uhidev1: iclass 3/0, 3 report ids > ucc0 at uhidev1 reportid 1: 2 usages, 3 keys, enum > wskbd1 at ucc0 mux 1 > uhid0 at uhidev1 reportid 2: input=1, output=0, feature=0 > ucc1 at uhidev1 reportid 3: 21 usages, 14 keys, enum > wskbd2 at ucc1 mux 1 > uhidev2 at uhub3 port 6 configuration 1 interface 0 "Genius Optical Mouse" > rev 1.10/1.00 addr 4 > uhidev2: iclass 3/1 > ums0 at uhidev2: 3 buttons, Z dir > wsmouse0 at ums0 mux 0 > uhub4 at uhub2 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" > rev 2.00/0.00 addr 2 > vscsi0 at root > scsibus5 at vscsi0: 256 targets > softraid0 at root > scsibus6 at softraid0: 256 targets > root on sd3a (761a7a05237a5a1d.a) swap on sd3b dump on sd3b > inteldrm0: 1360x768, 32bpp > wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation), using wskbd0 > wskbd1: connecting to wsdisplay0 > wskbd2: connecting to wsdisplay0 > wsdisplay0: screen 1-5 added (std, vt100 emulation) > #include <stdlib.h> > #include <math.h> > #include <err.h> > > #include <samplerate.h> > > int > main() > { > float irate = 48000; > float orate = 44100; > float *signal = NULL; > > long time = 60 * 60 * 4; > long len = irate * time; > > SRC_DATA data; > float t; > long s; > > signal = calloc(len, sizeof(float)); > for (t = 0, s = 0; s < len; t += 1/irate, s++) > signal[s] = sin(t); > /*signal[s] = 0;*/ > > data.data_in = signal; > data.data_out = calloc(len, sizeof(float)); > data.src_ratio = (1.0 * orate) / irate; > data.input_frames = len; > data.output_frames = len; > > if (src_simple (&data, SRC_LINEAR, 1)) { > /* > See api_misc.md#error-reporting for how to convert > the error value into a text string. > */ > warnx("rate conversion error"); > } > > if (data.input_frames_used < len) > warnx("Only %ld < %ld used", data.input_frames_used, len); > if (data.output_frames_gen < (orate * time)) > warnx("Only %ld < %ld generated", > data.output_frames_gen, (long) orate * time); > > return 0; > } >
