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RAM-based timeshift as an alternative to disk-based timeshift. When
enabled via config.timeshift.ram_mode, live DVB TS data is buffered
in a fixed-size circular RAM ring buffer instead of written to disk.
After a configurable delay (config.timeshift.ram_delay_seconds,
default 10 s) timeshift activates automatically so the viewer sees
the time-delayed picture. Pause, unpause, and seek all work
identically to disk timeshift.
The ring buffer capacity is derived from the delay setting with
delay_seconds * 4 MB (e.g. 10 s -> 40 MB). Once the buffer wraps,
the oldest data is silently overwritten, so only the most recent
seconds of content are available for rewind -- by design this is an
"instant replay" feature, not a replacement for disk timeshift.
Core components:
eRamRingBuffer -- seekable circular RAM buffer addressed by
monotonically increasing absolute byte offsets.
Handles wrap-around transparently.
eRamTsSource -- iTsSource implementation backed by the ring
buffer. Returns EAGAIN when the read position
has been lapped (ring overwrite) and signals the
service layer to recover. Returns 0 at the
write edge so the push thread retries.
eRamRecorder -- eDVBRecordScrambledThread subclass that writes
into RAM instead of disk and extracts PCR
timestamps for seek support.
eRamServicePlay -- extends eDVBServicePlay with RAM recording,
timer-based auto-activation, PCR-based seeking,
lap-detection watchdog, and CSA descrambling
support for StreamRelay channels.
Seeking and lap-recovery use forcePosition() on eFilePushThread which
directly sets the push thread's m_current_position. This bypasses
both setStartOffset() (which has no effect because the push thread
never calls m_source->offset()) and the cue-sheet path (which relies
on tstools .ap data that does not exist for RAM buffers).
The push thread EOF path is reordered so that timeshift mode
(m_flags == 1) returns to the read loop without sending evtEOF,
avoiding ~70 spurious "End of file!" events per session.
* improve stream recovery for ram timeshift
* master: [RestoreScreen] * improve backup flag file detection * find alternative backup tar files [StartEnigma] * improve backup flag file detection [StartEnigma] * use /etc/autorestoreloop instead of /media/hdd/images/config/autorestore for autorestore loop check add h8se [Scan] Fix services with same SID on different transponders overwriting each other [Navigation] * add recording support for wrapper links Update groupedservices Refactor BaseParser and SubRipParser for consistency and readability; update method names to snake_case [Migration] * finally fix Filecommander settings migration Migration.py fix typo text updates pot update translation update [Menu.py] Fix menu navigation via digit entry Revert "Update groupedservices" [FileCommander] * move convertSettings to Migration [FileCommander] Add missing method spacing
* update
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RAM-based timeshift as an alternative to disk-based timeshift. When enabled via config.timeshift.ram_mode, live DVB TS data is buffered in a fixed-size circular RAM ring buffer instead of written to disk. After a configurable delay (config.timeshift.ram_delay_seconds, default 10 s) timeshift activates automatically so the viewer sees the time-delayed picture. Pause, unpause, and seek all work identically to disk timeshift.
The ring buffer capacity is derived from the delay setting with delay_seconds * 4 MB (e.g. 10 s -> 40 MB). Once the buffer wraps, the oldest data is silently overwritten, so only the most recent seconds of content are available for rewind -- by design this is an "instant replay" feature, not a replacement for disk timeshift.
Core components:
eRamRingBuffer -- seekable circular RAM buffer addressed by
monotonically increasing absolute byte offsets.
Handles wrap-around transparently.
eRamTsSource -- iTsSource implementation backed by the ring
buffer. Returns EAGAIN when the read position
has been lapped (ring overwrite) and signals the
service layer to recover. Returns 0 at the
write edge so the push thread retries.
eRamRecorder -- eDVBRecordScrambledThread subclass that writes
into RAM instead of disk and extracts PCR
timestamps for seek support.
eRamServicePlay -- extends eDVBServicePlay with RAM recording,
timer-based auto-activation, PCR-based seeking,
lap-detection watchdog, and CSA descrambling
support for StreamRelay channels.
Seeking and lap-recovery use forcePosition() on eFilePushThread which directly sets the push thread's m_current_position. This bypasses both setStartOffset() (which has no effect because the push thread never calls m_source->offset()) and the cue-sheet path (which relies on tstools .ap data that does not exist for RAM buffers).
The push thread EOF path is reordered so that timeshift mode (m_flags == 1) returns to the read loop without sending evtEOF, avoiding ~70 spurious "End of file!" events per session.