stagefright: get stream header information from MPEG2 video tracks (4bd13b79) · Commits · e / os / android_frameworks_av

include/media/stagefright/MetaData.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -53,6 +53,7 @@ enum {
		kKeyFrameRate = 'frmR', // int32_t (video frame rate fps)
		kKeyBitRate = 'brte', // int32_t (bps)
		kKeyMaxBitRate = 'mxBr', // int32_t (bps)
		kKeyStreamHeader = 'stHd', // raw data
		kKeyESDS = 'esds', // raw data
		kKeyAACProfile = 'aacp', // int32_t
		kKeyAVCC = 'avcc', // raw data

+21 −0

Original line number	Diff line number	Diff line
		@@ -51,6 +51,11 @@

		namespace android {

		enum {
		// max track header chunk to return
		kMaxTrackHeaderSize = 32,
		};

		class MPEG4Source : public MediaSource {
		public:
		// Caller retains ownership of both "dataSource" and "sampleTable".
		@@ -476,6 +481,22 @@ sp<MetaData> MPEG4Extractor::getTrackMetaData(
		((int64_t)sampleTime * 1000000) / track->timescale);
		}
		}

		// MPEG2 tracks do not provide CSD, so read the stream header
		if (!strcmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG2)) {
		off64_t offset;
		size_t size;
		if (track->sampleTable->getMetaDataForSample(
		0 /* sampleIndex /, &offset, &size, NULL / sampleTime */) == OK) {
		if (size > kMaxTrackHeaderSize) {
		size = kMaxTrackHeaderSize;
		}
		uint8_t header[kMaxTrackHeaderSize];
		if (mDataSource->readAt(offset, &header, size) == (ssize_t)size) {
		track->meta->setData(kKeyStreamHeader, 'mdat', header, size);
		}
		}
		}
		}
		}