This series adds support in kernel to recognise raw (or plain) OPUS codec playback for compress offloading. At this point this series doesn't deal with OPUS packets packed in any kind of containers (OGG or others) and focuses on adding missing bits for pure OPUS packets. The second patch adds its usage in Qualcomm Audio DSP code. To correctly recognise raw OPUS packets by qdsp6, each packets needs to be prepended with 4-bytes field that contains length of a raw OPUS packet. It is expected to be useful for usecases when OPUS packets are streamed over network and they are not encapsulated in a container. Userspace application that will use the compress API has to manually add such 4-bytes long field to each OPUS packet. This is tested on sm8750-mtp. It is expected that next hardware revisions will also support raw OPUS codec offloading. Dependencies are: -- hardware with DSP that supports decoding OPUS packets (>=sm8750); -- adsp fastrpc for sm8750; -- explicitly setting format in sm8750 soundcard driver; -- running adsprpcd tool with support for Audio PD and DSP libraries loading support (or its alternative); -- tinycompress fcplay tool that will prepare raw opus packets and do the required addition of length field. The userspace tinycompress tool with support for raw OPUS compress playback is located here: https://github.com/laklimov/tinycompress_opus branch: opus_v3_workinprogress It is not expected that it is ready and still needs some work. More like PoC. Signed-off-by: Alexey Klimov <alexey.klimov@xxxxxxxxxx> --- Alexey Klimov (2): ALSA: compress: add raw opus codec define and struct snd_dec_opus ASoC: qcom: qdsp6/audioreach: add support for offloading raw opus playback include/uapi/sound/compress_params.h | 21 ++++++++++++++++++++- sound/soc/qcom/qdsp6/audioreach.c | 33 +++++++++++++++++++++++++++++++++ sound/soc/qcom/qdsp6/audioreach.h | 17 +++++++++++++++++ sound/soc/qcom/qdsp6/q6apm-dai.c | 3 ++- sound/soc/qcom/qdsp6/q6apm.c | 3 +++ 5 files changed, 75 insertions(+), 2 deletions(-) --- base-commit: 050f8ad7b58d9079455af171ac279c4b9b828c11 change-id: 20250616-opus_codec_rfc_v1-b60bd308893b Best regards, -- Alexey Klimov <alexey.klimov@xxxxxxxxxx>
