diff options
| author | Joris Verhaegen <verhaegen@google.com> | 2025-09-05 10:12:55 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2025-09-08 09:33:24 +0200 |
| commit | f20a53974f79619d0ef6c9f17bb8693499fb6ebb (patch) | |
| tree | 41985e4258f18283390376ce46e20e9f0202b203 /sound/core | |
| parent | 2c92e2fbe9e22cefdae87d8a0d654691ee4c1957 (diff) | |
ALSA: compress_offload: Add SNDRV_COMPRESS_TSTAMP64 ioctl
The previous patch introduced the internal infrastructure for handling
64-bit timestamps. This patch exposes this capability to user-space.
Define the new ioctl command SNDRV_COMPRESS_TSTAMP64, which allows
applications to fetch the overflow-safe struct snd_compr_tstamp64.
The ioctl dispatch table is updated to handle the new command by
calling a new snd_compr_tstamp64 handler, while the legacy path is
renamed to snd_compr_tstamp32 for clarity.
This patch bumps the SNDRV_COMPRESS_VERSION to 0.4.0.
Reviewed-by: Miller Liang <millerliang@google.com>
Tested-by: Joris Verhaegen <verhaegen@google.com>
Signed-off-by: Joris Verhaegen <verhaegen@google.com>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20250905091301.2711705-3-verhaegen@google.com
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/compress_offload.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c index d3164aa07158..445220fdb6a0 100644 --- a/sound/core/compress_offload.c +++ b/sound/core/compress_offload.c @@ -736,18 +736,23 @@ snd_compr_set_metadata(struct snd_compr_stream *stream, unsigned long arg) return retval; } -static inline int -snd_compr_tstamp(struct snd_compr_stream *stream, unsigned long arg) +static inline int snd_compr_tstamp(struct snd_compr_stream *stream, + unsigned long arg, bool is_32bit) { struct snd_compr_tstamp64 tstamp64 = { 0 }; struct snd_compr_tstamp tstamp32 = { 0 }; + const void *copy_from = &tstamp64; + size_t copy_size = sizeof(tstamp64); int ret; ret = snd_compr_update_tstamp(stream, &tstamp64); if (ret == 0) { - snd_compr_tstamp32_from_64(&tstamp32, &tstamp64); - ret = copy_to_user((struct snd_compr_tstamp __user *)arg, - &tstamp32, sizeof(tstamp32)) ? + if (is_32bit) { + snd_compr_tstamp32_from_64(&tstamp32, &tstamp64); + copy_from = &tstamp32; + copy_size = sizeof(tstamp32); + } + ret = copy_to_user((void __user *)arg, copy_from, copy_size) ? -EFAULT : 0; } @@ -1327,7 +1332,9 @@ static long snd_compr_ioctl(struct file *f, unsigned int cmd, unsigned long arg) switch (cmd) { case SNDRV_COMPRESS_TSTAMP: - return snd_compr_tstamp(stream, arg); + return snd_compr_tstamp(stream, arg, true); + case SNDRV_COMPRESS_TSTAMP64: + return snd_compr_tstamp(stream, arg, false); case SNDRV_COMPRESS_AVAIL: return snd_compr_ioctl_avail(stream, arg); case SNDRV_COMPRESS_PAUSE: |