mirror of https://github.com/thesofproject/sof.git
2cc0d1f9c6
The audio tests signals contain a start and end marker to extract the test output to analyze from in-between the markers. This patch fixes a fail in SRC tests that was caused by incorrect synchronization to output data. The chirp upper frequency is limited to 0.99 x Nyquist frequency since the Nyquist frequency in the end aliased and caused a visible artefact to spectral plot and it triggered a resampler filter impulse response that had some correlation with start/end marker chirps. The cosine chirp initialization to start from 90 degrees (zero PCM code instead of max.) also cleaned the start impulse and improved the look of spectrogram plot. The syncronization was limited to seek from one measured channel only. The sync finder also didn't handle properly multi-channel input. The output file start marker scan length was reduced to be idle+marker length. And the scan time for end was reduced to be 2xidle+marker length Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com> |
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| kmod_scripts | ||
| rimage/keys | ||
| rmbox | ||
| test | ||
| topology | ||
| tune/src | ||
| .gitignore | ||
| Makefile.am | ||
| README | ||
| autogen.sh | ||
| configure.ac | ||
README
Sound Open Firmware Tools ========================= This is a collection of open source tools used to develop open source audio DSP firmwares for ALSA. Building and Installing ======================= ./autogen.sh (only needed first time) ./configure make make install rimage ====== rimage is used to convert ELF executable firmware files to the firmware file formats used by the kernel drivers. e.g. rimage -i elf_file -o kernel_file -m machine rimage can also convert kernel firmware formats to flat binaries formats to assist in debugging :- e.g. convert to flat binary, then ELF then dissasemble rimage -i /lib/firmware/intel/reef-byt.ri -o image.bin -b -m byt xtensa-byt-elf-objcopy -I binary -O elf32-xtensa-le -B xtensa image.bin image.bin.elf xtensa-byt-elf-objdump -D image.bin.elf > image.dis.txt