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Bug 1860954 add a conversion operator from MediaTrackGraphImpl to Lookup for HashSet.lookup(*graph) r=pehrsons

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Differential Revision: https://phabricator.services.mozilla.com/D191920
This commit is contained in:
Karl Tomlinson 2023-10-27 07:52:45 +00:00
parent 6431e9277a
commit 241af1cdbc
2 changed files with 14 additions and 7 deletions
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18
dom/media/MediaTrackGraph.cpp
View File

@ -117,12 +117,12 @@ void DeviceInputTrackManager::Remove(DeviceInputTrack* aTrack) {
}
}
namespace {
/**
* A hash table containing the graph instances, one per Window ID,
* sample rate, and device ID combination.
*/
struct GraphLookup final {
struct MediaTrackGraphImpl::Lookup final {
HashNumber Hash() const {
return HashGeneric(mWindowID, mSampleRate, mOutputDeviceID);
}
@ -131,8 +131,14 @@ struct GraphLookup final {
const CubebUtils::AudioDeviceID mOutputDeviceID;
};
// Implicit to support GraphHashSet.lookup(*graph).
MOZ_IMPLICIT MediaTrackGraphImpl::operator MediaTrackGraphImpl::Lookup() const {
return {mWindowID, mSampleRate, mOutputDeviceID};
}
namespace {
struct GraphHasher { // for HashSet
using Lookup = const GraphLookup;
using Lookup = const MediaTrackGraphImpl::Lookup;
static HashNumber hash(const Lookup& aLookup) { return aLookup.Hash(); }
@ -3600,8 +3606,7 @@ void MediaTrackGraph::AddTrack(MediaTrack* aTrack) {
MediaTrackGraphImpl* graph = static_cast<MediaTrackGraphImpl*>(this);
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
if (graph->mRealtime) {
GraphHashSet::Ptr p = Graphs()->lookup(
{graph->mWindowID, GraphRate(), graph->mOutputDeviceID});
GraphHashSet::Ptr p = Graphs()->lookup(*graph);
MOZ_DIAGNOSTIC_ASSERT(p, "Graph must not be shutting down");
}
#endif
@ -3621,8 +3626,7 @@ void MediaTrackGraphImpl::RemoveTrack(MediaTrack* aTrack) {
if (mRealtime) {
// Find the graph in the hash table and remove it.
GraphHashSet* graphs = Graphs();
GraphHashSet::Ptr p =
graphs->lookup({mWindowID, mSampleRate, mOutputDeviceID});
GraphHashSet::Ptr p = graphs->lookup(*this);
MOZ_ASSERT(*p == this);
graphs->remove(p);

3
dom/media/MediaTrackGraphImpl.h
View File

@ -142,6 +142,9 @@ class MediaTrackGraphImpl : public MediaTrackGraph,
static MediaTrackGraphImpl* GetInstanceIfExists(
uint64_t aWindowID, TrackRate aSampleRate,
CubebUtils::AudioDeviceID aOutputDeviceID);
// For GraphHashSet:
struct Lookup;
operator Lookup() const;
// Intended only for assertions, either on graph thread or not running (in
// which case we must be on the main thread).