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ALSA: compress_offload: Add SNDRV_COMPRESS_AVAIL64 ioctl

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The previous patch introduced a 64-bit timestamp ioctl
(SNDRV_COMPRESS_TSTAMP64). To provide a consistent API, this patch
adds a corresponding 64-bit version of the SNDRV_COMPRESS_AVAIL ioctl.

A new struct snd_compr_avail64 is added to the UAPI, which includes
the 64-bit timestamp. The existing ioctl implementation is refactored
to handle both the 32-bit and 64-bit variants.

Reviewed-by: Miller Liang <millerliang@google.com>
Tested-by: Joris Verhaegen <verhaegen@google.com>
Signed-off-by: Joris Verhaegen <verhaegen@google.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20250905091301.2711705-4-verhaegen@google.com
This commit is contained in:
Joris Verhaegen
2025-09-08 09:33:24 +02:00
committed by Takashi Iwai
parent f20a53974f
commit 86eec88c5b
2 changed files with 39 additions and 15 deletions
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include/uapi/sound/compress_offload.h
+11
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@@ -84,6 +84,16 @@ struct snd_compr_avail {
struct snd_compr_tstamp tstamp;
} __attribute__((packed, aligned(4)));
/**
* struct snd_compr_avail64 - avail descriptor with tstamp in 64 bit format
* @avail: Number of bytes available in ring buffer for writing/reading
* @tstamp: timestamp information
*/
struct snd_compr_avail64 {
__u64 avail;
struct snd_compr_tstamp64 tstamp;
} __attribute__((packed, aligned(4)));
enum snd_compr_direction {
SND_COMPRESS_PLAYBACK = 0,
SND_COMPRESS_CAPTURE,
@@ -231,6 +241,7 @@ struct snd_compr_task_status {
#define SNDRV_COMPRESS_TSTAMP _IOR('C', 0x20, struct snd_compr_tstamp)
#define SNDRV_COMPRESS_AVAIL _IOR('C', 0x21, struct snd_compr_avail)
#define SNDRV_COMPRESS_TSTAMP64 _IOR('C', 0x22, struct snd_compr_tstamp64)
#define SNDRV_COMPRESS_AVAIL64 _IOR('C', 0x23, struct snd_compr_avail64)
#define SNDRV_COMPRESS_PAUSE _IO('C', 0x30)
#define SNDRV_COMPRESS_RESUME _IO('C', 0x31)
#define SNDRV_COMPRESS_START _IO('C', 0x32)