Re: [PATCH v12 07/15] media: v4l2: Add audio capture and output support

On Thu, Jan 18, 2024 at 10:15 PM Shengjiu Wang [off-list ref] wrote:

Audio signal processing has the requirement for memory to
memory similar as Video.

This patch is to add this support in v4l2 framework, defined
new buffer type V4L2_BUF_TYPE_AUDIO_CAPTURE and
V4L2_BUF_TYPE_AUDIO_OUTPUT, defined new format v4l2_audio_format
for audio case usage.

The created audio device is named "/dev/v4l-audioX".

Signed-off-by: Shengjiu Wang <redacted>
---
 .../userspace-api/media/v4l/buffer.rst        |  6 ++
 .../media/v4l/dev-audio-mem2mem.rst           | 71 +++++++++++++++++++
 .../userspace-api/media/v4l/devices.rst       |  1 +
 .../media/v4l/vidioc-enum-fmt.rst             |  2 +
 .../userspace-api/media/v4l/vidioc-g-fmt.rst  |  4 ++
 .../media/videodev2.h.rst.exceptions          |  2 +
 .../media/common/videobuf2/videobuf2-v4l2.c   |  4 ++
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |  9 +++
 drivers/media/v4l2-core/v4l2-dev.c            | 17 +++++
 drivers/media/v4l2-core/v4l2-ioctl.c          | 53 ++++++++++++++
 include/media/v4l2-dev.h                      |  2 +
 include/media/v4l2-ioctl.h                    | 34 +++++++++
 include/uapi/linux/videodev2.h                | 17 +++++
 13 files changed, 222 insertions(+)
 create mode 100644 Documentation/userspace-api/media/v4l/dev-audio-mem2mem.rst

For drivers/media/common/videobuf2:

Acked-by: Tomasz Figa <tfiga@chromium.org>

Best regards,
Tomasz