loliball/media3
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Fix access to stale ByteBuffer in FfmpegAudioDecoder

Browse Source 
The native code can now reallocate the buffer if it needs to grow
its size, so we have to reacquire a reference in the Java code to
avoid accessing a stale instance.

This fixes a bug introduced by 8750ed8de6.

PiperOrigin-RevId: 578799862
This commit is contained in:
tonihei 2023-11-02 03:53:19 -07:00 committed by Copybara-Service
parent d4e5ab2c4d
commit ae6f83d298
1 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
libraries/decoder_ffmpeg/src/main/java/androidx/media3/decoder/ffmpeg/FfmpegAudioDecoder.java
View File

@ -15,11 +15,12 @@
*/
package androidx.media3.decoder.ffmpeg;
import static androidx.media3.common.util.Assertions.checkNotNull;
import androidx.annotation.Nullable;
import androidx.media3.common.C;
import androidx.media3.common.Format;
import androidx.media3.common.MimeTypes;
import androidx.media3.common.util.Assertions;
import androidx.media3.common.util.ParsableByteArray;
import androidx.media3.common.util.Util;
import androidx.media3.decoder.DecoderInputBuffer;
@ -59,8 +60,8 @@ import java.util.List;
if (!FfmpegLibrary.isAvailable()) {
throw new FfmpegDecoderException("Failed to load decoder native libraries.");
}
Assertions.checkNotNull(format.sampleMimeType);
codecName = Assertions.checkNotNull(FfmpegLibrary.getCodecName(format.sampleMimeType));
checkNotNull(format.sampleMimeType);
codecName = checkNotNull(FfmpegLibrary.getCodecName(format.sampleMimeType));
extraData = getExtraData(format.sampleMimeType, format.initializationData);
encoding = outputFloat ? C.ENCODING_PCM_FLOAT : C.ENCODING_PCM_16BIT;
outputBufferSize =
@ -128,7 +129,7 @@ import java.util.List;
channelCount = ffmpegGetChannelCount(nativeContext);
sampleRate = ffmpegGetSampleRate(nativeContext);
if (sampleRate == 0 && "alac".equals(codecName)) {
Assertions.checkNotNull(extraData);
checkNotNull(extraData);
// ALAC decoder did not set the sample rate in earlier versions of FFmpeg. See
// https://trac.ffmpeg.org/ticket/6096.
ParsableByteArray parsableExtraData = new ParsableByteArray(extraData);
@ -137,6 +138,9 @@ import java.util.List;
}
hasOutputFormat = true;
}
// Get a new reference to the output ByteBuffer in case the native decode method reallocated the
// buffer to grow its size.
outputData = checkNotNull(outputBuffer.data);
outputData.position(0);
outputData.limit(result);
return null;