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Bug 1125340 - (1/2) Gather telemetry on H.264 profile & level values. r=cpearce

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This commit is contained in:
Mike Taylor 2015-02-03 12:27:00 +01:00
parent a849105e3a
commit 96f9f6b1c4
2 changed files with 25 additions and 1 deletions
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14
dom/media/VideoUtils.cpp
View File

@ -12,6 +12,7 @@
#include "SharedThreadPool.h"
#include "mozilla/Preferences.h"
#include "mozilla/Base64.h"
#include "mozilla/Telemetry.h"
#include "nsIRandomGenerator.h"
#include "nsIServiceManager.h"
#include "MediaTaskQueue.h"
@ -224,7 +225,7 @@ ExtractH264CodecDetails(const nsAString& aCodec,
return false;
}
// Extract the profile_idc, constrains, and level_idc.
// Extract the profile_idc and level_idc.
nsresult rv = NS_OK;
aProfile = PromiseFlatString(Substring(aCodec, 5, 2)).ToInteger(&rv, 16);
NS_ENSURE_SUCCESS(rv, false);
@ -232,6 +233,17 @@ ExtractH264CodecDetails(const nsAString& aCodec,
aLevel = PromiseFlatString(Substring(aCodec, 9, 2)).ToInteger(&rv, 16);
NS_ENSURE_SUCCESS(rv, false);
// 244 is the highest meaningful profile value (High 4:4:4 Intra Profile)
// that can be represented as single hex byte, otherwise collect 0 for unknown.
Telemetry::Accumulate(Telemetry::VIDEO_CANPLAYTYPE_H264_PROFILE,
aProfile <= 244 ? aProfile : 0);
// Make sure aLevel represents a value between levels 1 and 5.2,
// otherwise collect 0 for unknown.
Telemetry::Accumulate(Telemetry::VIDEO_CANPLAYTYPE_H264_LEVEL,
(aLevel >= 10 && aLevel <= 52) ? aLevel : 0);
return true;
}

12
toolkit/components/telemetry/Histograms.json
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@ -5447,6 +5447,18 @@
"n_buckets": "1000",
"description": "The time (in milliseconds) that it took a 'reconfigure thread' request to go round trip."
},
"VIDEO_CANPLAYTYPE_H264_LEVEL": {
"expires_in_version": "40",
"kind": "enumerated",
"n_values": 51,
"description": "The H.264 level (level_idc) as extracted from the codecs parameter passed to HTMLMediaElement.canPlayType, from levels 1 (10) to 5.2 (51), with the addition of 0 for unknown values."
},
"VIDEO_CANPLAYTYPE_H264_PROFILE": {
"expires_in_version": "40",
"kind": "enumerated",
"n_values": 244,
"description": "The H.264 profile number (profile_idc) as extracted from the codecs parameter passed to HTMLMediaElement.canPlayType."
},
"WEBRTC_ICE_FINAL_CONNECTION_STATE": {
"expires_in_version": "never",
"kind": "enumerated",