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Jarkko Sakkinen
jarkko
Edited 5 days ago
Stream signaling for vcam: output_fd when read returns (sequence, flags) pairs. Currently there is only a single flag: VCAM_CONTROL_STREAM_ON.
Blocking read() and poll() can be then used to in the source to see client app starts or stops streaming video.
Blocking read() and poll() can be then used to in the source to see client app starts or stops streaming video.
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Next iteration:
struct vcam_ioc_new {
__u64 device_name;
__u32 device_nr;
__u32 output_fd;
__u32 control_fd;
__u8 reserved[12]; /* must be zeroed */
};
enum vcam_control_flags {
VCAM_CONTROL_STREAM_ON = 1ULL << 0,
};
#define VCAM_IOC_NEW _IOWR('v', 0x00, struct vcam_ioc_new)
control_fd emits u64's and read() returns when flags differ from previous call.
struct vcam_ioc_new {
__u64 device_name;
__u32 device_nr;
__u32 output_fd;
__u32 control_fd;
__u8 reserved[12]; /* must be zeroed */
};
enum vcam_control_flags {
VCAM_CONTROL_STREAM_ON = 1ULL << 0,
};
#define VCAM_IOC_NEW _IOWR('v', 0x00, struct vcam_ioc_new)
control_fd emits u64's and read() returns when flags differ from previous call.
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