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Improve support for high-resolution stats

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* This patch adds a new microsecond-resolution function call, LiGetMicroseconds(), to complement
the existing LiGetMillis(). Many variables used by stats have been updated to work at this
higher resolution and now provide better results when displaying e.g. sub-millisecond frametime stats.
To try and avoid confusion, variables that now contain microseconds have been renamed with a suffix
of 'Us', and those ending in 'Ms' contain milliseconds. I originally experimented with nanoseconds but it
felt like overkill for our needs.

Public API in Limelight.h:
uint64_t LiGetMicroseconds(void);
uint64_t LiGetMillis(void);
const RTP_AUDIO_STATS* LiGetRTPAudioStats(void);  // provides access to RTP data for the overlay stats
const RTP_VIDEO_STATS* LiGetRTPVideoStats(void);

Note: Users of this library may need to make changes. If using LiGetMillis() to track the duration of
something that is shown to the user, consider switching to LiGetMicroseconds(). Remember to divide by
1000 at time of display to show in milliseconds.
This commit is contained in:
Andy Grundman
2024-09-12 03:24:29 -04:00
committed by Cameron Gutman
parent 5f2280183c
commit 82ee2d6590
15 changed files with 354 additions and 108 deletions
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6
src/RtpVideoQueue.h
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@@ -6,7 +6,7 @@ typedef struct _RTPV_QUEUE_ENTRY {
struct _RTPV_QUEUE_ENTRY* next;
struct _RTPV_QUEUE_ENTRY* prev;
PRTP_PACKET packet;
uint64_t receiveTimeMs;
uint64_t receiveTimeUs;
uint32_t presentationTimeMs;
int length;
bool isParity;
@@ -22,7 +22,7 @@ typedef struct _RTP_VIDEO_QUEUE {
RTPV_QUEUE_LIST pendingFecBlockList;
RTPV_QUEUE_LIST completedFecBlockList;
uint64_t bufferFirstRecvTimeMs;
uint64_t bufferFirstRecvTimeUs;
uint32_t bufferLowestSequenceNumber;
uint32_t bufferHighestSequenceNumber;
uint32_t bufferFirstParitySequenceNumber;
@@ -45,6 +45,8 @@ typedef struct _RTP_VIDEO_QUEUE {
uint32_t lastOosFramePresentationTimestamp;
bool receivedOosData;
RTP_VIDEO_STATS stats; // the above values are short-lived, this tracks stats for the life of the queue
} RTP_VIDEO_QUEUE, *PRTP_VIDEO_QUEUE;
#define RTPF_RET_QUEUED 0