On Fri, Sep 6, 2024 at 6:05 PM Shengjiu Wang <shengjiu.wang@xxxxxxx> wrote: > > This function is base on the accelerator implementation > for compress API: > https://patchwork.kernel.org/project/alsa-devel/patch/20240731083843.59911-1-perex@xxxxxxxx/ Hi Jaroslav Shall I add this patch to my patch set next time? Last time I reported an issue about "list_for_each_entry_safe_reverse", I can help to add it. or will you send another version by yourself? Best regards Shengjiu Wang > > Audio signal processing also has the requirement for memory to > memory similar as Video. > > This asrc memory to memory (memory ->asrc->memory) case is a non > real time use case. > > User fills the input buffer to the asrc module, after conversion, then asrc > sends back the output buffer to user. So it is not a traditional ALSA playback > and capture case. > > Because we had implemented the "memory -> asrc ->i2s device-> codec" > use case in ALSA. Now the "memory->asrc->memory" needs > to reuse the code in asrc driver, so the patch 1 and patch 2 is for refining > the code to make it can be shared by the "memory->asrc->memory" > driver. > > Other change is to add memory to memory support for two kinds of i.MX ASRC > modules. > > changes in v3: > - use Jaroslav's suggestion for header file compress_params.h (PATCH 01) > - remove the ASRC_OUTPUT_FORMAT/ASRC_OUTPUT_RATE definition > - remove ASRC_RATIO_MOD in this version because it uses .set_metadata() > Will wait Jaroslav's update or other better method in the future. > - Address some comments from Pierre. > > changes in v2: > - Remove the changes in compress API > - drop the SNDRV_COMPRESS_SRC_RATIO_MOD > - drop the SND_AUDIOCODEC_SRC and struct snd_dec_src > - define private metadata key value > ASRC_OUTPUT_FORMAT/ASRC_OUTPUT_RATE/ASRC_RATIO_MOD > > Shengjiu Wang (6): > ALSA: compress: Add output rate and output format support > ASoC: fsl_asrc: define functions for memory to memory usage > ASoC: fsl_easrc: define functions for memory to memory usage > ASoC: fsl_asrc_m2m: Add memory to memory function > ASoC: fsl_asrc: register m2m platform device > ASoC: fsl_easrc: register m2m platform device > > include/uapi/sound/compress_params.h | 23 +- > sound/soc/fsl/Kconfig | 1 + > sound/soc/fsl/Makefile | 2 +- > sound/soc/fsl/fsl_asrc.c | 179 ++++++- > sound/soc/fsl/fsl_asrc.h | 2 + > sound/soc/fsl/fsl_asrc_common.h | 70 +++ > sound/soc/fsl/fsl_asrc_m2m.c | 727 +++++++++++++++++++++++++++ > sound/soc/fsl/fsl_easrc.c | 261 +++++++++- > sound/soc/fsl/fsl_easrc.h | 4 + > 9 files changed, 1260 insertions(+), 9 deletions(-) > create mode 100644 sound/soc/fsl/fsl_asrc_m2m.c > > -- > 2.34.1 >
