Remove bit rate support

[defagos]

Pull request

Description

This PR removes bit rate support since it does not work anymore.

Changes made

• Update SRG Analytics to version 8.0.0.
• Remove associated APIs.

[pyby]

The code removed in the related library https://github.com/SRGSSR/srganalytics-apple/pull/68 modified the stream url to add __b__=800 query parameter, including to all other query parameters, a value encoding.

TL;DR ℹ️ On SRF stage, no url modification by the player (vod-stage.srf.ch). On SRF prod, url is modified by the player (srf-vod-amd.akamaized.net) and the new url is not playable.

Without the startBitRate property, which was implemented for Akamai MSL3 packaging solution, the played url is not modified anymore, even if the hostname contains "akamai".

Here is why it played on SRF stage and not in SRF prod:👇

The code to add __b__ parameter:

NSUInteger startBitRate = preferredSettings.startBitRate;
if (startBitRate != 0 && [URL.host containsString:@"akamai"] && [URL.path.pathExtension isEqualToString:@"m3u8"]) {
  NSURLComponents *URLComponents = [NSURLComponents componentsWithURL:URL resolvingAgainstBaseURL:NO];
  NSMutableArray<NSURLQueryItem *> *queryItems = URLComponents.queryItems.mutableCopy ?: [NSMutableArray array];
  [queryItems addObject:[NSURLQueryItem queryItemWithName:@"__b__" value:@(startBitRate).stringValue]];

  URLComponents.queryItems = queryItems.copy;
  URL = URLComponents.URL;
}

• Stage example:
  • https://vod-stage.srf.ch/world/hls/muesluemtv/2016/03/muesluemtv_20160318_143434_v_webcast_h264_,q40,q10,q20,q30,q50,.mp4.csmil/master.m3u8?start=60.96&end=1634.08&hdnts=st=1685581200~exp=1687309200~acl=/world/hls/muesluemtv/2016/03/muesluemtv_20160318_143434_v_webcast_h264_,q40,q10,q20,q30,q50,.mp4.csmil/*~data=60.96-1634.08~hmac=cc78cb0d90f28e7655fb506d992c063ecb266f46b21f0987065b00e3c2e411dc
  • ☑️ host url does not contain "akamai". No __b__ added, no url parameters encoded.
  • played url: same.
  • ✅ 200 on the manifest request.
• Prod example:
  • https://srf-vod-amd.akamaized.net/world/hls/ts20/2023/06/ts20_20230608_193000_19187032_v_webcast_h264_,q40,q10,q20,q30,q50,.mp4.csmil/master.m3u8?start=0.24&end=1390.16&hdnts=st=1685581200~exp=1687309200~acl=/world/hls/ts20/2023/06/ts20_20230608_193000_19187032_v_webcast_h264_,q40,q10,q20,q30,q50,.mp4.csmil/*~data=0.24-1390.16~hmac=fcf68165723dcfdeb15bd7c78d99df12282ee990e7ef90070633aa0ed445387d&caption=srf/d548ced8-96ce-433f-8e60-e18c57397fbd/episode/de/vod/vod.m3u8:de:Deutsch:sdh&webvttbaseurl=subtitles.eai-general.aws.srf.ch
  • ✅ host url contains "akamai". __b__ added, and url parameters encoded. = converted to %3D.
  • played url: https://srf-vod-amd.akamaized.net/world/hls/ts20/2023/06/ts20_20230608_193000_19187032_v_webcast_h264_,q40,q10,q20,q30,q50,q60,.mp4.csmil/master.m3u8?start=0.24&end=1390.16&hdnts=st%3D1685581200~exp%3D1687309200~acl%3D/world/hls/ts20/2023/06/ts20_20230608_193000_19187032_v_webcast_h264_,q40,q10,q20,q30,q50,q60,.mp4.csmil/*~data%3D0.24-1390.16~hmac%3D7c5a67424f233a03845e45a0b6a0cb512c8a8fc3d50b1cd358c48a3bb1fd6d59&caption=srf/d548ced8-96ce-433f-8e60-e18c57397fbd/episode/de/vod/vod.m3u8:de:Deutsch:sdh&webvttbaseurl=subtitles.eai-general.aws.srf.ch&__b__=800
  • ❌ 403 on the manifest request.

It explains why nobody catched this issue on SRF stage environnement, and only in production environment.

With this PR, no more startBitRate property, which was implemented for Akamai MSL3 packaging solution. The played url is now not modified anymore, even if the hostname contains "akamai".