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Commit 6dff4983 authored by Surajit Podder's avatar Surajit Podder Committed by Linux Build Service Account
Browse files

libstagefright: Use proper ctts offset 

Calculate ctts offset as difference between composition
time and decoding time, and avoid adding kMaxCttsOffsetTimeUs
as it increases the sample timestamp by the same amount
which leads to av sync loss for B-frames.

CRs-Fixed: 524739
Change-Id: I75a1bb594536623e3a445af2ee1ceb0cf0926a6e
parent 0102ad6c

media/libstagefright/MPEG4Writer.cpp

+2 −2
Original line number Diff line number Diff line
@@ -2328,8 +2328,8 @@ status_t MPEG4Writer::Track::threadEntry() { 
            CHECK(meta_data->findInt64(kKeyDecodingTime, &decodingTimeUs));

            decodingTimeUs -= previousPausedDurationUs;

            cttsOffsetTimeUs =

                    timestampUs + kMaxCttsOffsetTimeUs - decodingTimeUs;

            if (WARN_UNLESS(cttsOffsetTimeUs >= 0ll, "for %s track", trackName)) {

                    timestampUs - decodingTimeUs;

            if (WARN_UNLESS(kMaxCttsOffsetTimeUs >= decodingTimeUs - timestampUs, "for %s track", trackName)) {

                copy->release();

                return ERROR_MALFORMED;

            }