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Simplify encryption handling in HLS.

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This commit is contained in:
Oliver Woodman 2015-03-12 19:42:00 +00:00
parent fabd470550
commit fb36f85e0d
4 changed files with 18 additions and 13 deletions
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2
library/src/main/java/com/google/android/exoplayer/hls/HlsChunkSource.java
View file

@ -306,7 +306,7 @@ public class HlsChunkSource {
Uri chunkUri = UriUtil.resolveToUri(mediaPlaylist.baseUri, segment.url); Uri chunkUri = UriUtil.resolveToUri(mediaPlaylist.baseUri, segment.url);
// Check if encryption is specified. // Check if encryption is specified.
if (HlsMediaPlaylist.ENCRYPTION_METHOD_AES_128.equals(segment.encryptionMethod)) { if (segment.isEncrypted) {
Uri keyUri = UriUtil.resolveToUri(mediaPlaylist.baseUri, segment.encryptionKeyUri); Uri keyUri = UriUtil.resolveToUri(mediaPlaylist.baseUri, segment.encryptionKeyUri);
if (!keyUri.equals(encryptionKeyUri)) { if (!keyUri.equals(encryptionKeyUri)) {
// Encryption is specified and the key has changed. // Encryption is specified and the key has changed.

9
library/src/main/java/com/google/android/exoplayer/hls/HlsMediaPlaylist.java
View file

@ -28,24 +28,25 @@ public final class HlsMediaPlaylist extends HlsPlaylist {
* Media segment reference. * Media segment reference.
*/ */
public static final class Segment implements Comparable<Long> { public static final class Segment implements Comparable<Long> {
public final boolean discontinuity; public final boolean discontinuity;
public final double durationSecs; public final double durationSecs;
public final String url; public final String url;
public final long startTimeUs; public final long startTimeUs;
public final String encryptionMethod; public final boolean isEncrypted;
public final String encryptionKeyUri; public final String encryptionKeyUri;
public final String encryptionIV; public final String encryptionIV;
public final int byterangeOffset; public final int byterangeOffset;
public final int byterangeLength; public final int byterangeLength;
public Segment(String uri, double durationSecs, boolean discontinuity, long startTimeUs, public Segment(String uri, double durationSecs, boolean discontinuity, long startTimeUs,
String encryptionMethod, String encryptionKeyUri, String encryptionIV, boolean isEncrypted, String encryptionKeyUri, String encryptionIV, int byterangeOffset,
int byterangeOffset, int byterangeLength) { int byterangeLength) {
this.url = uri; this.url = uri;
this.durationSecs = durationSecs; this.durationSecs = durationSecs;
this.discontinuity = discontinuity; this.discontinuity = discontinuity;
this.startTimeUs = startTimeUs; this.startTimeUs = startTimeUs;
this.encryptionMethod = encryptionMethod; this.isEncrypted = isEncrypted;
this.encryptionKeyUri = encryptionKeyUri; this.encryptionKeyUri = encryptionKeyUri;
this.encryptionIV = encryptionIV; this.encryptionIV = encryptionIV;
this.byterangeOffset = byterangeOffset; this.byterangeOffset = byterangeOffset;

6
library/src/main/java/com/google/android/exoplayer/hls/HlsPlaylistParser.java
View file

@ -64,6 +64,9 @@ public final class HlsPlaylistParser implements NetworkLoadable.Parser<HlsPlayli
private static final String SUBTITLES_TYPE = "SUBTITLES"; private static final String SUBTITLES_TYPE = "SUBTITLES";
private static final String CLOSED_CAPTIONS_TYPE = "CLOSED-CAPTIONS"; private static final String CLOSED_CAPTIONS_TYPE = "CLOSED-CAPTIONS";
private static final String METHOD_NONE = "NONE";
private static final String METHOD_AES128 = "AES-128";
private static final Pattern BANDWIDTH_ATTR_REGEX = private static final Pattern BANDWIDTH_ATTR_REGEX =
Pattern.compile(BANDWIDTH_ATTR + "=(\\d+)\\b"); Pattern.compile(BANDWIDTH_ATTR + "=(\\d+)\\b");
private static final Pattern CODECS_ATTR_REGEX = private static final Pattern CODECS_ATTR_REGEX =
@ -80,8 +83,9 @@ public final class HlsPlaylistParser implements NetworkLoadable.Parser<HlsPlayli
Pattern.compile(VERSION_TAG + ":(\\d+)\\b"); Pattern.compile(VERSION_TAG + ":(\\d+)\\b");
private static final Pattern BYTERANGE_REGEX = private static final Pattern BYTERANGE_REGEX =
Pattern.compile(BYTERANGE_TAG + ":(\\d+(?:@\\d+)?)\\b"); Pattern.compile(BYTERANGE_TAG + ":(\\d+(?:@\\d+)?)\\b");
private static final Pattern METHOD_ATTR_REGEX = private static final Pattern METHOD_ATTR_REGEX =
Pattern.compile(METHOD_ATTR + "=([^,.*]+)"); Pattern.compile(METHOD_ATTR + "=(" + METHOD_NONE + "|" + METHOD_AES128 + ")");
private static final Pattern URI_ATTR_REGEX = private static final Pattern URI_ATTR_REGEX =
Pattern.compile(URI_ATTR + "=\"(.+)\""); Pattern.compile(URI_ATTR + "=\"(.+)\"");
private static final Pattern IV_ATTR_REGEX = private static final Pattern IV_ATTR_REGEX =

14
library/src/test/java/com/google/android/exoplayer/hls/HlsMediaPlaylistParserTest.java
View file

@ -81,7 +81,7 @@ public class HlsMediaPlaylistParserTest extends TestCase {
assertEquals(false, segments.get(0).discontinuity); assertEquals(false, segments.get(0).discontinuity);
assertEquals(7.975, segments.get(0).durationSecs); assertEquals(7.975, segments.get(0).durationSecs);
assertEquals(null, segments.get(0).encryptionMethod); assertEquals(false, segments.get(0).isEncrypted);
assertEquals(null, segments.get(0).encryptionKeyUri); assertEquals(null, segments.get(0).encryptionKeyUri);
assertEquals(null, segments.get(0).encryptionIV); assertEquals(null, segments.get(0).encryptionIV);
assertEquals(51370, segments.get(0).byterangeLength); assertEquals(51370, segments.get(0).byterangeLength);
@ -90,7 +90,7 @@ public class HlsMediaPlaylistParserTest extends TestCase {
assertEquals(false, segments.get(1).discontinuity); assertEquals(false, segments.get(1).discontinuity);
assertEquals(7.975, segments.get(1).durationSecs); assertEquals(7.975, segments.get(1).durationSecs);
assertEquals("AES-128", segments.get(1).encryptionMethod); assertEquals(true, segments.get(1).isEncrypted);
assertEquals("https://priv.example.com/key.php?r=2680", segments.get(1).encryptionKeyUri); assertEquals("https://priv.example.com/key.php?r=2680", segments.get(1).encryptionKeyUri);
assertEquals("0x1566B", segments.get(1).encryptionIV); assertEquals("0x1566B", segments.get(1).encryptionIV);
assertEquals(51501, segments.get(1).byterangeLength); assertEquals(51501, segments.get(1).byterangeLength);
@ -99,7 +99,7 @@ public class HlsMediaPlaylistParserTest extends TestCase {
assertEquals(false, segments.get(2).discontinuity); assertEquals(false, segments.get(2).discontinuity);
assertEquals(7.941, segments.get(2).durationSecs); assertEquals(7.941, segments.get(2).durationSecs);
assertEquals(HlsMediaPlaylist.ENCRYPTION_METHOD_NONE, segments.get(2).encryptionMethod); assertEquals(false, segments.get(2).isEncrypted);
assertEquals(null, segments.get(2).encryptionKeyUri); assertEquals(null, segments.get(2).encryptionKeyUri);
assertEquals(null, segments.get(2).encryptionIV); assertEquals(null, segments.get(2).encryptionIV);
assertEquals(51501, segments.get(2).byterangeLength); assertEquals(51501, segments.get(2).byterangeLength);
@ -108,7 +108,7 @@ public class HlsMediaPlaylistParserTest extends TestCase {
assertEquals(true, segments.get(3).discontinuity); assertEquals(true, segments.get(3).discontinuity);
assertEquals(7.975, segments.get(3).durationSecs); assertEquals(7.975, segments.get(3).durationSecs);
assertEquals("AES-128", segments.get(3).encryptionMethod); assertEquals(true, segments.get(3).isEncrypted);
assertEquals("https://priv.example.com/key.php?r=2682", segments.get(3).encryptionKeyUri); assertEquals("https://priv.example.com/key.php?r=2682", segments.get(3).encryptionKeyUri);
// 0xA7A == 2682. // 0xA7A == 2682.
assertNotNull(segments.get(3).encryptionIV); assertNotNull(segments.get(3).encryptionIV);
@ -119,11 +119,11 @@ public class HlsMediaPlaylistParserTest extends TestCase {
assertEquals(false, segments.get(4).discontinuity); assertEquals(false, segments.get(4).discontinuity);
assertEquals(7.975, segments.get(4).durationSecs); assertEquals(7.975, segments.get(4).durationSecs);
assertEquals("AES-128", segments.get(4).encryptionMethod); assertEquals(true, segments.get(4).isEncrypted);
assertEquals("https://priv.example.com/key.php?r=2682", segments.get(4).encryptionKeyUri); assertEquals("https://priv.example.com/key.php?r=2682", segments.get(4).encryptionKeyUri);
// 0xA7A == 2682. // 0xA7B == 2683.
assertNotNull(segments.get(4).encryptionIV); assertNotNull(segments.get(4).encryptionIV);
assertEquals("A7A", segments.get(4).encryptionIV.toUpperCase(Locale.getDefault())); assertEquals("A7B", segments.get(4).encryptionIV.toUpperCase(Locale.getDefault()));
assertEquals(C.LENGTH_UNBOUNDED, segments.get(4).byterangeLength); assertEquals(C.LENGTH_UNBOUNDED, segments.get(4).byterangeLength);
assertEquals(0, segments.get(4).byterangeOffset); assertEquals(0, segments.get(4).byterangeOffset);
assertEquals("https://priv.example.com/fileSequence2683.ts", segments.get(4).url); assertEquals("https://priv.example.com/fileSequence2683.ts", segments.get(4).url);