Re: [RFC PATCH v5 09/11] media: uapi: define audio sample format fourcc type

Hi Shengjiu,

On 28/09/2023 11:00, Shengjiu Wang wrote:

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 | 277 ++++++++++++++++++ .../userspace-api/media/v4l/pixfmt.rst | 1 + drivers/media/v4l2-core/v4l2-ioctl.c | 51 ++++ include/uapi/linux/videodev2.h | 56 ++++ 4 files changed, 385 insertions(+) create mode 100644 Documentation/userspace-api/media/v4l/pixfmt-audio.rst

I think it would make more sense if this patch came after 07/11, so swap this and the previous patch around.

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..6ff114dfc2d1 --- /dev/null +++ b/Documentation/userspace-api/media/v4l/pixfmt-audio.rst @@ -0,0 +1,277 @@ +.. 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'
  

•  - Correspond to SNDRV_PCM_FORMAT_S8 in ALSA
  

Correspond -> Corresponds

(fix everywhere below)

• • .. _V4L2-AUDIO-FMT-U8:

•  - ``V4L2_AUDIO_FMT_U8``
  

•  - 'U8'
  

•  - Correspond to SNDRV_PCM_FORMAT_U8 in ALSA
  

• • .. _V4L2-AUDIO-FMT-S16-LE:

•  - ``V4L2_AUDIO_FMT_S16_LE``
  

•  - 'S16_LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_S16_LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-S16-BE:

•  - ``V4L2_AUDIO_FMT_S16_BE``
  

•  - 'S16_BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_S16_BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-U16-LE:

•  - ``V4L2_AUDIO_FMT_U16_LE``
  

•  - 'U16_LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_U16_LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-U16-BE:

•  - ``V4L2_AUDIO_FMT_U16_BE``
  

•  - 'U16_BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_U16_BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-S24-LE:

•  - ``V4L2_AUDIO_FMT_S24_LE``
  

•  - 'S24_LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_S24_LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-S24-BE:

•  - ``V4L2_AUDIO_FMT_S24_BE``
  

•  - 'S24_BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_S24_BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-U24-LE:

•  - ``V4L2_AUDIO_FMT_U24_LE``
  

•  - 'U24_LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_U24_LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-U24-BE:

•  - ``V4L2_AUDIO_FMT_U24_BE``
  

•  - 'U24_BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_U24_BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-S32-LE:

•  - ``V4L2_AUDIO_FMT_S32_LE``
  

•  - 'S32_LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_S32_LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-S32-BE:

•  - ``V4L2_AUDIO_FMT_S32_BE``
  

•  - 'S32_BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_S32_BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-U32-LE:

•  - ``V4L2_AUDIO_FMT_U32_LE``
  

•  - 'U32_LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_U32_LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-U32-BE:

•  - ``V4L2_AUDIO_FMT_U32_BE``
  

•  - 'U32_BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_U32_BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-FLOAT-LE:

•  - ``V4L2_AUDIO_FMT_FLOAT_LE``
  

•  - 'FLOAT_LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_FLOAT_LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-FLOAT-BE:

•  - ``V4L2_AUDIO_FMT_FLOAT_BE``
  

•  - 'FLOAT_BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_FLOAT_BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-FLOAT64-LE:

•  - ``V4L2_AUDIO_FMT_FLOAT64_LE``
  

•  - 'FLOAT64_LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_FLOAT64_LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-FLOAT64-BE:

•  - ``V4L2_AUDIO_FMT_FLOAT64_BE``
  

•  - 'FLOAT64_BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_FLOAT64_BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-IEC958-SUBFRAME-LE:

•  - ``V4L2_AUDIO_FMT_IEC958_SUBFRAME_LE``
  

•  - 'IEC958_SUBFRAME_LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-IEC958-SUBFRAME-BE:

•  - ``V4L2_AUDIO_FMT_IEC958_SUBFRAME_BE``
  

•  - 'IEC958_SUBFRAME_BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-MU-LAW:

•  - ``V4L2_AUDIO_FMT_MU_LAW``
  

•  - 'MU_LAW'
  

•  - Correspond to SNDRV_PCM_FORMAT_MU_LAW in ALSA
  

• • .. _V4L2-AUDIO-FMT-A-LAW:

•  - ``V4L2_AUDIO_FMT_A_LAW``
  

•  - 'A_LAW'
  

•  - Correspond to SNDRV_PCM_FORMAT_A_LAW in ALSA
  

• • .. _V4L2-AUDIO-FMT-IMA-ADPCM:

•  - ``V4L2_AUDIO_FMT_IMA_ADPCM``
  

•  - 'IMA_ADPCM'
  

•  - Correspond to SNDRV_PCM_FORMAT_IMA_ADPCM in ALSA
  

• • .. _V4L2-AUDIO-FMT-MPEG:

•  - ``V4L2_AUDIO_FMT_MPEG``
  

•  - 'MPEG'
  

•  - Correspond to SNDRV_PCM_FORMAT_MPEG in ALSA
  

• • .. _V4L2-AUDIO-FMT-GSM:

•  - ``V4L2_AUDIO_FMT_GSM``
  

•  - 'GSM'
  

•  - Correspond to SNDRV_PCM_FORMAT_GSM in ALSA
  

• • .. _V4L2-AUDIO-FMT-S20-LE:

•  - ``V4L2_AUDIO_FMT_S20_LE``
  

•  - 'S20_LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_S20_LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-S20-BE:

•  - ``V4L2_AUDIO_FMT_S20_BE``
  

•  - 'S20_BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_S20_BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-U20-LE:

•  - ``V4L2_AUDIO_FMT_U20_LE``
  

•  - 'U20_LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_U20_LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-U20-BE:

•  - ``V4L2_AUDIO_FMT_U20_BE``
  

•  - 'U20_BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_U20_BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-SPECIAL:

•  - ``V4L2_AUDIO_FMT_SPECIAL``
  

•  - 'SPECIAL'
  

•  - Correspond to SNDRV_PCM_FORMAT_SPECIAL in ALSA
  

In alsa it says:

/* FIXME: the following format is not defined properly yet */ [SNDRV_PCM_FORMAT_SPECIAL] = { .le = -1, .signd = -1, },

Which suggests to me that we should just skip it.

• • .. _V4L2-AUDIO-FMT-S24-3LE:

•  - ``V4L2_AUDIO_FMT_S24_3LE``
  

•  - 'S24_3LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_S24_3LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-S24-3BE:

•  - ``V4L2_AUDIO_FMT_S24_3BE``
  

•  - 'S24_3BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_S24_3BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-U24-3LE:

•  - ``V4L2_AUDIO_FMT_U24_3LE``
  

•  - 'U24_3LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_U24_3LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-U24-3BE:

•  - ``V4L2_AUDIO_FMT_U24_3BE``
  

•  - 'U24_3BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_U24_3BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-S20-3LE:

•  - ``V4L2_AUDIO_FMT_S20_3LE``
  

•  - 'S20_3LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_S24_3LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-S20-3BE:

•  - ``V4L2_AUDIO_FMT_S20_3BE``
  

•  - 'S20_3BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_S20_3BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-U20-3LE:

•  - ``V4L2_AUDIO_FMT_U20_3LE``
  

•  - 'U20_3LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_U20_3LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-U20-3BE:

•  - ``V4L2_AUDIO_FMT_U20_3BE``
  

•  - 'U20_3BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_U20_3BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-S18-3LE:

•  - ``V4L2_AUDIO_FMT_S18_3LE``
  

•  - 'S18_3LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_S18_3LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-S18-3BE:

•  - ``V4L2_AUDIO_FMT_S18_3BE``
  

•  - 'S18_3BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_S18_3BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-U18-3LE:

•  - ``V4L2_AUDIO_FMT_U18_3LE``
  

•  - 'U18_3LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_U18_3LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-U18-3BE:

•  - ``V4L2_AUDIO_FMT_U18_3BE``
  

•  - 'U18_3BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_U18_3BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-G723-24:

•  - ``V4L2_AUDIO_FMT_G723_24``
  

•  - 'G723_24'
  

•  - Correspond to SNDRV_PCM_FORMAT_G723_24 in ALSA
  

• • .. _V4L2-AUDIO-FMT-G723-24-1B:

•  - ``V4L2_AUDIO_FMT_G723_24_1B``
  

•  - 'G723_24_1B'
  

•  - Correspond to SNDRV_PCM_FORMAT_G723_24_1B in ALSA
  

• • .. _V4L2-AUDIO-FMT-G723-40:

•  - ``V4L2_AUDIO_FMT_G723_40``
  

•  - 'G723_40'
  

•  - Correspond to SNDRV_PCM_FORMAT_G723_40 in ALSA
  

• • .. _V4L2-AUDIO-FMT-G723-40-1B:

•  - ``V4L2_AUDIO_FMT_G723_40_1B``
  

•  - 'G723_40_1B'
  

•  - Correspond to SNDRV_PCM_FORMAT_G723_40_1B in ALSA
  

• • .. _V4L2-AUDIO-FMT-DSD-U8:

•  - ``V4L2_AUDIO_FMT_DSD-U8``
  

•  - 'DSD_U8'
  

•  - Correspond to SNDRV_PCM_FORMAT_DSD_U8 in ALSA
  

• • .. _V4L2-AUDIO-FMT-DSD-U16-LE:

•  - ``V4L2_AUDIO_FMT_DSD-U16-LE``
  

•  - 'DSD_U16_LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_DSD_U16_LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-DSD-U32-LE:

•  - ``V4L2_AUDIO_FMT_DSD-U32-LE``
  

•  - 'DSD_U32_LE'
  

•  - Correspond to SNDRV_PCM_FORMAT_DSD_U32_LE in ALSA
  

• • .. _V4L2-AUDIO-FMT-DSD-U16-BE:

•  - ``V4L2_AUDIO_FMT_DSD-U16-BE``
  

•  - 'DSD_U16_BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_DSD_U16_BE in ALSA
  

• • .. _V4L2-AUDIO-FMT-DSD-U32-BE:

•  - ``V4L2_AUDIO_FMT_DSD-U32-BE``
  

•  - 'DSD_U32_BE'
  

•  - Correspond to SNDRV_PCM_FORMAT_DSD_U32_BE in ALSA
  

diff --git a/Documentation/userspace-api/media/v4l/pixfmt.rst b/Documentation/userspace-api/media/v4l/pixfmt.rst index 11dab4a90630..2eb6fdd3b43d 100644 --- a/Documentation/userspace-api/media/v4l/pixfmt.rst +++ b/Documentation/userspace-api/media/v4l/pixfmt.rst @@ -36,3 +36,4 @@ see also :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>`.) colorspaces colorspaces-defs colorspaces-details

• pixfmt-audio

diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 1a40090d8287..044611d5d3f8 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -1471,6 +1471,57 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) case V4L2_PIX_FMT_Y210: descr = "10-bit YUYV Packed"; break; case V4L2_PIX_FMT_Y212: descr = "12-bit YUYV Packed"; break; case V4L2_PIX_FMT_Y216: descr = "16-bit YUYV Packed"; break;

• case V4L2_AUDIO_FMT_S8: descr = "8-bit Signed"; break;
• case V4L2_AUDIO_FMT_U8: descr = "8-bit Unsigned"; break;
• case V4L2_AUDIO_FMT_S16_LE: descr = "16-bit Signed LE"; break;
• case V4L2_AUDIO_FMT_S16_BE: descr = "16-bit Signed BE"; break;
• case V4L2_AUDIO_FMT_U16_LE: descr = "16-bit Unsigned LE"; break;
• case V4L2_AUDIO_FMT_U16_BE: descr = "16-bit Unsigned BE"; break;
• case V4L2_AUDIO_FMT_S24_LE: descr = "24(32)-bit Signed LE"; break;
• case V4L2_AUDIO_FMT_S24_BE: descr = "24(32)-bit Signed BE"; break;
• case V4L2_AUDIO_FMT_U24_LE: descr = "24(32)-bit Unsigned LE"; break;
• case V4L2_AUDIO_FMT_U24_BE: descr = "24(32)-bit Unsigned BE"; break;
• case V4L2_AUDIO_FMT_S32_LE: descr = "32-bit Signed LE"; break;
• case V4L2_AUDIO_FMT_S32_BE: descr = "32-bit Signed BE"; break;
• case V4L2_AUDIO_FMT_U32_LE: descr = "32-bit Unsigned LE"; break;
• case V4L2_AUDIO_FMT_U32_BE: descr = "32-bit Unsigned BE"; break;
• case V4L2_AUDIO_FMT_FLOAT_LE: descr = "32-bit Float LE"; break;
• case V4L2_AUDIO_FMT_FLOAT_BE: descr = "32-bit Float BE"; break;
• case V4L2_AUDIO_FMT_FLOAT64_LE: descr = "64-bit Float LE"; break;
• case V4L2_AUDIO_FMT_FLOAT64_BE: descr = "64-bit Float BE"; break;
• case V4L2_AUDIO_FMT_IEC958_SUBFRAME_LE: descr = "32-bit IEC958 LE"; break;
• case V4L2_AUDIO_FMT_IEC958_SUBFRAME_BE: descr = "32-bit IEC958 BE"; break;
• case V4L2_AUDIO_FMT_MU_LAW: descr = "Mu Law"; break;
• case V4L2_AUDIO_FMT_A_LAW: descr = "A Law"; break;
• case V4L2_AUDIO_FMT_IMA_ADPCM: descr = "IMA ADPCM"; break;
• case V4L2_AUDIO_FMT_MPEG: descr = "MPEG Audio"; break;

Compressed formats are handled in the default case, and those set theV4L2_FMT_FLAG_COMPRESSED flag. That's true for MPEG and perhaps also for some of the other audio formats?

I'm no audio expert, so I don't know which are compressed or not.

• case V4L2_AUDIO_FMT_GSM: descr = "GSM Audio"; break;

• case V4L2_AUDIO_FMT_S20_LE: descr = "20-bit Signed LE"; break;

• case V4L2_AUDIO_FMT_S20_BE: descr = "20-bit Signed BE"; break;

• case V4L2_AUDIO_FMT_U20_LE: descr = "20-bit Unsigned LE"; break;

• case V4L2_AUDIO_FMT_U20_BE: descr = "20-bit Unsigned BE"; break;

• case V4L2_AUDIO_FMT_SPECIAL: descr = "Special Audio"; break;

• case V4L2_AUDIO_FMT_S24_3LE: descr = "24(24)-bit Signed LE"; break;

• case V4L2_AUDIO_FMT_S24_3BE: descr = "24(24)-bit Signed BE"; break;

• case V4L2_AUDIO_FMT_U24_3LE: descr = "24(24)-bit Unsigned LE"; break;

• case V4L2_AUDIO_FMT_U24_3BE: descr = "24(24)-bit Unsigned BE"; break;

• case V4L2_AUDIO_FMT_S20_3LE: descr = "20(24)-bit Signed LE"; break;

• case V4L2_AUDIO_FMT_S20_3BE: descr = "20(24)-bit Signed BE"; break;

• case V4L2_AUDIO_FMT_U20_3LE: descr = "20(24)-bit Unsigned LE"; break;

• case V4L2_AUDIO_FMT_U20_3BE: descr = "20(24)-bit Unsigned BE"; break;

• case V4L2_AUDIO_FMT_S18_3LE: descr = "18(24)-bit Signed LE"; break;

• case V4L2_AUDIO_FMT_S18_3BE: descr = "18(24)-bit Signed BE"; break;

• case V4L2_AUDIO_FMT_U18_3LE: descr = "18(24)-bit Unsigned LE"; break;

• case V4L2_AUDIO_FMT_U18_3BE: descr = "18(24)-bit Unsigned BE"; break;

• case V4L2_AUDIO_FMT_G723_24: descr = "G723 24"; break;

• case V4L2_AUDIO_FMT_G723_24_1B: descr = "G723 24 1b"; break;

• case V4L2_AUDIO_FMT_G723_40: descr = "G723 40"; break;

• case V4L2_AUDIO_FMT_G723_40_1B: descr = "G723 40 1b"; break;

• case V4L2_AUDIO_FMT_DSD_U8: descr = "8-bit DSD"; break;

• case V4L2_AUDIO_FMT_DSD_U16_LE: descr = "16-bit DSD LE"; break;

• case V4L2_AUDIO_FMT_DSD_U32_LE: descr = "32-bit DSD LE"; break;

• case V4L2_AUDIO_FMT_DSD_U16_BE: descr = "16-bit DSD BE"; break;

• case V4L2_AUDIO_FMT_DSD_U32_BE: descr = "32-bit DSD BE"; break;

  default: /* Compressed formats */

diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 166c51f537cc..72d7d71050ee 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -842,6 +842,62 @@ struct v4l2_pix_format { #define V4L2_META_FMT_RK_ISP1_PARAMS v4l2_fourcc('R', 'K', '1', 'P') /* Rockchip ISP1 3A Parameters */ #define V4L2_META_FMT_RK_ISP1_STAT_3A v4l2_fourcc('R', 'K', '1', 'S') /* Rockchip ISP1 3A Statistics */

+/* Audio-data formats */

I think that for now you should only include the formats that your hardware actually supports.

But it is important to mention in the comment that all these audio formats use a fourcc starting with 'AU' followed by the SNDRV_PCM_FORMAT_ value from asound.h.

+#define V4L2_AUDIO_FMT_S8 v4l2_fourcc('A', 'U', '0', '0') +#define V4L2_AUDIO_FMT_U8 v4l2_fourcc('A', 'U', '0', '1') +#define V4L2_AUDIO_FMT_S16_LE v4l2_fourcc('A', 'U', '0', '2') +#define V4L2_AUDIO_FMT_S16_BE v4l2_fourcc('A', 'U', '0', '3') +#define V4L2_AUDIO_FMT_U16_LE v4l2_fourcc('A', 'U', '0', '4') +#define V4L2_AUDIO_FMT_U16_BE v4l2_fourcc('A', 'U', '0', '5') +#define V4L2_AUDIO_FMT_S24_LE v4l2_fourcc('A', 'U', '0', '6') +#define V4L2_AUDIO_FMT_S24_BE v4l2_fourcc('A', 'U', '0', '7') +#define V4L2_AUDIO_FMT_U24_LE v4l2_fourcc('A', 'U', '0', '8') +#define V4L2_AUDIO_FMT_U24_BE v4l2_fourcc('A', 'U', '0', '9')

+#define V4L2_AUDIO_FMT_S32_LE v4l2_fourcc('A', 'U', '1', '0') +#define V4L2_AUDIO_FMT_S32_BE v4l2_fourcc('A', 'U', '1', '1') +#define V4L2_AUDIO_FMT_U32_LE v4l2_fourcc('A', 'U', '1', '2') +#define V4L2_AUDIO_FMT_U32_BE v4l2_fourcc('A', 'U', '1', '3') +#define V4L2_AUDIO_FMT_FLOAT_LE v4l2_fourcc('A', 'U', '1', '4') +#define V4L2_AUDIO_FMT_FLOAT_BE v4l2_fourcc('A', 'U', '1', '5') +#define V4L2_AUDIO_FMT_FLOAT64_LE v4l2_fourcc('A', 'U', '1', '6') +#define V4L2_AUDIO_FMT_FLOAT64_BE v4l2_fourcc('A', 'U', '1', '7') +#define V4L2_AUDIO_FMT_IEC958_SUBFRAME_LE v4l2_fourcc('A', 'U', '1', '8') +#define V4L2_AUDIO_FMT_IEC958_SUBFRAME_BE v4l2_fourcc('A', 'U', '1', '9')

+#define V4L2_AUDIO_FMT_MU_LAW v4l2_fourcc('A', 'U', '2', '0') +#define V4L2_AUDIO_FMT_A_LAW v4l2_fourcc('A', 'U', '2', '1') +#define V4L2_AUDIO_FMT_IMA_ADPCM v4l2_fourcc('A', 'U', '2', '2') +#define V4L2_AUDIO_FMT_MPEG v4l2_fourcc('A', 'U', '2', '3') +#define V4L2_AUDIO_FMT_GSM v4l2_fourcc('A', 'U', '2', '4') +#define V4L2_AUDIO_FMT_S20_LE v4l2_fourcc('A', 'U', '2', '5') +#define V4L2_AUDIO_FMT_S20_BE v4l2_fourcc('A', 'U', '2', '6') +#define V4L2_AUDIO_FMT_U20_LE v4l2_fourcc('A', 'U', '2', '7') +#define V4L2_AUDIO_FMT_U20_BE v4l2_fourcc('A', 'U', '2', '8')

+#define V4L2_AUDIO_FMT_SPECIAL v4l2_fourcc('A', 'U', '3', '1') +#define V4L2_AUDIO_FMT_S24_3LE v4l2_fourcc('A', 'U', '3', '2') +#define V4L2_AUDIO_FMT_S24_3BE v4l2_fourcc('A', 'U', '3', '3') +#define V4L2_AUDIO_FMT_U24_3LE v4l2_fourcc('A', 'U', '3', '4') +#define V4L2_AUDIO_FMT_U24_3BE v4l2_fourcc('A', 'U', '3', '5') +#define V4L2_AUDIO_FMT_S20_3LE v4l2_fourcc('A', 'U', '3', '6') +#define V4L2_AUDIO_FMT_S20_3BE v4l2_fourcc('A', 'U', '3', '7') +#define V4L2_AUDIO_FMT_U20_3LE v4l2_fourcc('A', 'U', '3', '8') +#define V4L2_AUDIO_FMT_U20_3BE v4l2_fourcc('A', 'U', '3', '9') +#define V4L2_AUDIO_FMT_S18_3LE v4l2_fourcc('A', 'U', '4', '0') +#define V4L2_AUDIO_FMT_S18_3BE v4l2_fourcc('A', 'U', '4', '1') +#define V4L2_AUDIO_FMT_U18_3LE v4l2_fourcc('A', 'U', '4', '2') +#define V4L2_AUDIO_FMT_U18_3BE v4l2_fourcc('A', 'U', '4', '3') +#define V4L2_AUDIO_FMT_G723_24 v4l2_fourcc('A', 'U', '4', '4') +#define V4L2_AUDIO_FMT_G723_24_1B v4l2_fourcc('A', 'U', '4', '5') +#define V4L2_AUDIO_FMT_G723_40 v4l2_fourcc('A', 'U', '4', '6') +#define V4L2_AUDIO_FMT_G723_40_1B v4l2_fourcc('A', 'U', '4', '7') +#define V4L2_AUDIO_FMT_DSD_U8 v4l2_fourcc('A', 'U', '4', '8') +#define V4L2_AUDIO_FMT_DSD_U16_LE v4l2_fourcc('A', 'U', '4', '9') +#define V4L2_AUDIO_FMT_DSD_U32_LE v4l2_fourcc('A', 'U', '5', '0') +#define V4L2_AUDIO_FMT_DSD_U16_BE v4l2_fourcc('A', 'U', '5', '1') +#define V4L2_AUDIO_FMT_DSD_U32_BE v4l2_fourcc('A', 'U', '5', '2')

/* priv field value to indicates that subsequent fields are valid. */ #define V4L2_PIX_FMT_PRIV_MAGIC 0xfeedcafe

Regards,

Hans