Em Thu, 18 Jan 2024 20:32:01 +0800 Shengjiu Wang shengjiu.wang@nxp.com escreveu:
The audio sample format definition is from alsa, the header file is include/uapi/sound/asound.h, but don't include this header file directly, because in user space, there is another copy in alsa-lib. There will be conflict in userspace for include videodev2.h & asound.h and asoundlib.h
Here still use the fourcc format.
Signed-off-by: Shengjiu Wang shengjiu.wang@nxp.com
.../userspace-api/media/v4l/pixfmt-audio.rst | 87 +++++++++++++++++++ .../userspace-api/media/v4l/pixfmt.rst | 1 + drivers/media/v4l2-core/v4l2-ioctl.c | 13 +++ include/uapi/linux/videodev2.h | 23 +++++ 4 files changed, 124 insertions(+) create mode 100644 Documentation/userspace-api/media/v4l/pixfmt-audio.rst
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-audio.rst b/Documentation/userspace-api/media/v4l/pixfmt-audio.rst new file mode 100644 index 000000000000..04b4a7fbd8f4 --- /dev/null +++ b/Documentation/userspace-api/media/v4l/pixfmt-audio.rst @@ -0,0 +1,87 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. _pixfmt-audio:
+************* +Audio Formats +*************
+These formats are used for :ref:`audiomem2mem` interface only.
+.. tabularcolumns:: |p{5.8cm}|p{1.2cm}|p{10.3cm}|
+.. cssclass:: longtable
+.. flat-table:: Audio Format
- :header-rows: 1
- :stub-columns: 0
- :widths: 3 1 4
- Identifier
- Code
- Details
- .. _V4L2-AUDIO-FMT-S8:
- ``V4L2_AUDIO_FMT_S8``
- 'S8'
- Corresponds to SNDRV_PCM_FORMAT_S8 in ALSA
- .. _V4L2-AUDIO-FMT-S16-LE:
Hmm... why can't we just use SNDRV_*_FORMAT_*? Those are already part of an uAPI header. No need to add any abstraction here and/or redefine what is there already at include/uapi/sound/asound.h.
Thanks, Mauro