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Make sure to not download segments multiple times 

For some reason streamate playlists can go back in time. This change
makes sure, that we don't download segments multiple times as a
consequence of the time travelling ;)
This commit is contained in:
0xboobface 2018-12-17 19:04:57 +01:00
parent 75fedfcddd
commit ad71f0cf11
3 changed files with 14 additions and 6 deletions
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1
CHANGELOG.md
View File

@ -9,6 +9,7 @@
than this value, get deleted automatically.
* Double-click in Recording tab starts the player
* Fix: BongaCams friends tab not working
* Fix: BongaCams search fails with JSON exception
* Fix: In some cases MFC models got confused
1.15.0

3
common/src/main/java/ctbrec/recorder/download/AbstractHlsDownload.java
View File

@ -52,6 +52,9 @@ public abstract class AbstractHlsDownload implements Download {
Request request = new Request.Builder().url(segmentsUrl).addHeader("connection", "keep-alive").build();
try(Response response = client.execute(request)) {
if(response.isSuccessful()) {
// String body = response.body().string();
// InputStream inputStream = new ByteArrayInputStream(body.getBytes("utf-8"));
// LOG.debug("Segments {}", body);
InputStream inputStream = response.body().byteStream();
PlaylistParser parser = new PlaylistParser(inputStream, Format.EXT_M3U, Encoding.UTF_8, ParsingMode.LENIENT);
Playlist playlist = parser.parse();

16
common/src/main/java/ctbrec/recorder/download/HlsDownload.java
View File

@ -76,13 +76,13 @@ public class HlsDownload extends AbstractHlsDownload {
}
int lastSegment = 0;
int nextSegment = 0;
boolean sleep = true; // this enables sleeping between playlist requests. once we miss a segment, this is set to false, so that no sleeping happens anymore
int waitFactor = 1;
while(running) {
SegmentPlaylist lsp = getNextSegments(segments);
if(nextSegment > 0 && lsp.seq > nextSegment) {
// TODO switch to a lower bitrate/resolution ?!?
LOG.warn("Missed segments {} < {} in download for {}", nextSegment, lsp.seq, model);
sleep = false;
waitFactor *= 2;
LOG.warn("Missed segments {} < {} in download for {} - setting wait factor to 1/{}", nextSegment, lsp.seq, model, waitFactor);
}
int skip = nextSegment - lsp.seq;
for (String segment : lsp.segments) {
@ -97,9 +97,9 @@ public class HlsDownload extends AbstractHlsDownload {
}
long wait = 0;
if(sleep && lastSegment == lsp.seq) {
if(lastSegment == lsp.seq) {
// playlist didn't change -> wait for at least half the target duration
wait = (long) lsp.targetDuration * 1000 / 2;
wait = (long) lsp.targetDuration * 1000 / waitFactor;
LOG.trace("Playlist didn't change... waiting for {}ms", wait);
} else {
// playlist did change -> wait for at least last segment duration
@ -115,8 +115,12 @@ public class HlsDownload extends AbstractHlsDownload {
}
}
// this if check makes sure, that we don't decrease nextSegment. for some reason
// streamate playlists sometimes jump back. e.g. max sequence = 79 -> 80 -> 79
lastSegment = lsp.seq;
nextSegment = lastSegment + lsp.segments.size();
if(lastSegment + lsp.segments.size() > nextSegment) {
nextSegment = lastSegment + lsp.segments.size();
}
}
} else {
throw new IOException("Couldn't determine segments uri");