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| 1 /* | |
| 2 * Copyright 2015 The WebRTC Project Authors. All rights reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #import "ARDSDPUtils.h" | |
| 12 | |
| 13 #import "WebRTC/RTCLogging.h" | |
| 14 #import "WebRTC/RTCSessionDescription.h" | |
| 15 | |
| 16 @implementation ARDSDPUtils | |
| 17 | |
| 18 + (RTCSessionDescription *) | |
| 19 descriptionForDescription:(RTCSessionDescription *)description | |
| 20 preferredVideoCodec:(NSString *)codec { | |
| 21 NSString *sdpString = description.sdp; | |
| 22 NSString *lineSeparator = @"\n"; | |
| 23 NSString *mLineSeparator = @" "; | |
| 24 // Copied from PeerConnectionClient.java. | |
| 25 // TODO(tkchin): Move this to a shared C++ file. | |
| 26 NSMutableArray *lines = | |
| 27 [NSMutableArray arrayWithArray: | |
| 28 [sdpString componentsSeparatedByString:lineSeparator]]; | |
| 29 NSInteger mLineIndex = -1; | |
| 30 NSString *codecRtpMap = nil; | |
| 31 // a=rtpmap:<payload type> <encoding name>/<clock rate> | |
| 32 // [/<encoding parameters>] | |
| 33 NSString *pattern = | |
| 34 [NSString stringWithFormat:@"^a=rtpmap:(\\d+) %@(/\\d+)+[\r]?$", codec]; | |
| 35 NSRegularExpression *regex = | |
| 36 [NSRegularExpression regularExpressionWithPattern:pattern | |
| 37 options:0 | |
| 38 error:nil]; | |
| 39 for (NSInteger i = 0; (i < lines.count) && (mLineIndex == -1 || !codecRtpMap); | |
| 40 ++i) { | |
| 41 NSString *line = lines[i]; | |
| 42 if ([line hasPrefix:@"m=video"]) { | |
| 43 mLineIndex = i; | |
| 44 continue; | |
| 45 } | |
| 46 NSTextCheckingResult *codecMatches = | |
| 47 [regex firstMatchInString:line | |
| 48 options:0 | |
| 49 range:NSMakeRange(0, line.length)]; | |
| 50 if (codecMatches) { | |
| 51 codecRtpMap = | |
| 52 [line substringWithRange:[codecMatches rangeAtIndex:1]]; | |
| 53 continue; | |
| 54 } | |
| 55 } | |
| 56 if (mLineIndex == -1) { | |
| 57 RTCLog(@"No m=video line, so can't prefer %@", codec); | |
| 58 return description; | |
| 59 } | |
| 60 if (!codecRtpMap) { | |
| 61 RTCLog(@"No rtpmap for %@", codec); | |
| 62 return description; | |
| 63 } | |
| 64 NSArray *origMLineParts = | |
| 65 [lines[mLineIndex] componentsSeparatedByString:mLineSeparator]; | |
| 66 if (origMLineParts.count > 3) { | |
| 67 NSMutableArray *newMLineParts = | |
| 68 [NSMutableArray arrayWithCapacity:origMLineParts.count]; | |
| 69 NSInteger origPartIndex = 0; | |
| 70 // Format is: m=<media> <port> <proto> <fmt> ... | |
| 71 [newMLineParts addObject:origMLineParts[origPartIndex++]]; | |
| 72 [newMLineParts addObject:origMLineParts[origPartIndex++]]; | |
| 73 [newMLineParts addObject:origMLineParts[origPartIndex++]]; | |
| 74 [newMLineParts addObject:codecRtpMap]; | |
| 75 for (; origPartIndex < origMLineParts.count; ++origPartIndex) { | |
| 76 if (![codecRtpMap isEqualToString:origMLineParts[origPartIndex]]) { | |
| 77 [newMLineParts addObject:origMLineParts[origPartIndex]]; | |
| 78 } | |
| 79 } | |
| 80 NSString *newMLine = | |
| 81 [newMLineParts componentsJoinedByString:mLineSeparator]; | |
| 82 [lines replaceObjectAtIndex:mLineIndex | |
| 83 withObject:newMLine]; | |
| 84 } else { | |
| 85 RTCLogWarning(@"Wrong SDP media description format: %@", lines[mLineIndex]); | |
| 86 } | |
| 87 NSString *mangledSdpString = [lines componentsJoinedByString:lineSeparator]; | |
| 88 return [[RTCSessionDescription alloc] initWithType:description.type | |
| 89 sdp:mangledSdpString]; | |
| 90 } | |
| 91 | |
| 92 @end | |
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Chromium Code Reviews
Issue 2343403002:
Rename AppRTCDemo on Android and iOS to AppRTCMobile (Closed)
