[RFC PATCH v3 0/6] ASoC: fsl: add memory to memory function for ASRC

[Shengjiu Wang]

On Fri, Sep 6, 2024 at 6:05 PM Shengjiu Wang <shengjiu.wang at nxp.com> wrote:
>
> This function is base on the accelerator implementation
> for compress API:
> https://patchwork.kernel.org/project/alsa-devel/patch/20240731083843.59911-1-perex@perex.cz/

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
>