diff options
Diffstat (limited to 'chromium/media/base/pipeline.h')
| -rw-r--r-- | chromium/media/base/pipeline.h | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/chromium/media/base/pipeline.h b/chromium/media/base/pipeline.h index 91332efc3d9..0df4066d957 100644 --- a/chromium/media/base/pipeline.h +++ b/chromium/media/base/pipeline.h @@ -106,14 +106,43 @@ class MEDIA_EXPORT Pipeline { Client* client, const PipelineStatusCB& seek_cb) = 0; + // Track switching works similarly for both audio and video. Callbacks are + // used to notify when it is time to procede to the next step, since many of + // the operations are asynchronous. + // ──────────────────── Track Switch Control Flow ─────────────────────── + // pipeline | demuxer | demuxer_stream | renderer | video/audio_renderer + // | | | | + // | | | | + // | | | | + // switch track | | | + // ---------> | | | + // | disable/enable stream | | + // | -----------> | | + // active streams | | | + // <--------- | | | + // | switch track | | + // --------------------------------------> | + // | | | Flush/Restart/Reset + // | | | ---------------> + // Notify pipeline of completed track change (via callback) + // <----------------------------------------------------- + // ──────────────────── Sometime in the future ────────────────────────── + // | | | OnBufferingStateChange + // | | | <---------------- + // | OnBufferingStateChange | | + // <-------------------------------------- | + // | | | | + // | | | | // |enabled_track_ids| contains track ids of enabled audio tracks. virtual void OnEnabledAudioTracksChanged( - const std::vector<MediaTrack::Id>& enabled_track_ids) = 0; + const std::vector<MediaTrack::Id>& enabled_track_ids, + base::OnceClosure change_completed_cb) = 0; // |selected_track_id| is either empty, which means no video track is // selected, or contains the selected video track id. virtual void OnSelectedVideoTrackChanged( - base::Optional<MediaTrack::Id> selected_track_id) = 0; + base::Optional<MediaTrack::Id> selected_track_id, + base::OnceClosure change_completed_cb) = 0; // Stops the pipeline. This is a blocking function. // If the pipeline is started, it must be stopped before destroying it. |