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5ef2ce69ff
While testing the [implementation for insertable streams] in `webrtcsink` & `webrtcsrc`, I encountered critical warnings, which turned out to result from two race conditions in `rtpsession`. Both race conditions produce: > GLib-CRITICAL: g_hash_table_foreach: > assertion 'version == hash_table->version' failed This commit fixes one of the race conditions observed. In its simplest form, the test consists in 2 pipelines and a Signalling server: * pipelines_sink: audiotestsrc ! webrtcsink * pipelines_src: webrtcsrc ! appsrc 1. Set `pipelines_sink` to `Playing`. 2. The Signalling server delivers the `producer_id`. 3. Initialize `pipelines_src` to establish a session with `producer_id`. 4. Set `pipelines_src` to `Playing`. 5. Wait for a buffer to be received by the `appsrc`. 6. Set `pipelines_src` to `Null`. 7. Set `pipelines_sink` to `Null`. The race condition happens in the following sequence: * `webrtcsink` runs a task to periodically retrieve statistics from `webrtcbin`. This transitively ends up executing `rtp_session_create_stats`. * `pipelines_sink` is set to `Null`. * In `Paused` to `Ready`, `gst_rtp_session_change_state()` calls `rtp_session_reset()`. * The assertion failure occurs when `rtp_session_reset` is called while `rtp_session_create_stats` is executing. This is because `rtp_session_create_stats` acquires the lock on `session` prior to calling `g_hash_table_foreach`, but `rtp_session_reset` doesn't acquire the lock before calling `g_hash_table_remove_all`. Acquiring the lock in `rtp_session_reset` fixes the issue. [implementing insertable streams support]: https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1176 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4528> |
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| alpha | ||
| apetag | ||
| audiofx | ||
| audioparsers | ||
| auparse | ||
| autodetect | ||
| avi | ||
| cutter | ||
| debugutils | ||
| deinterlace | ||
| dtmf | ||
| effectv | ||
| equalizer | ||
| flv | ||
| flx | ||
| goom | ||
| goom2k1 | ||
| icydemux | ||
| id3demux | ||
| imagefreeze | ||
| interleave | ||
| isomp4 | ||
| law | ||
| level | ||
| matroska | ||
| monoscope | ||
| multifile | ||
| multipart | ||
| replaygain | ||
| rtp | ||
| rtpmanager | ||
| rtsp | ||
| shapewipe | ||
| smpte | ||
| spectrum | ||
| udp | ||
| videobox | ||
| videocrop | ||
| videofilter | ||
| videomixer | ||
| wavenc | ||
| wavparse | ||
| xingmux | ||
| y4m | ||
| meson.build | ||