Added support for 3GPP meta data atoms (fbc9d2b9) · Commits · e / os / android_frameworks_av

media/libstagefright/MPEG4Extractor.cpp

+129 −2

Original line number	Diff line number	Diff line
		@@ -38,6 +38,8 @@
		#include <media/stagefright/MetaData.h>
		#include <utils/String8.h>

		#include <byteswap.h>

		namespace android {

		class MPEG4Source : public MediaSource {
		@@ -1551,7 +1553,7 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
		case FOURCC('d', 'a', 't', 'a'):
		{
		if (mPath.size() == 6 && underMetaDataPath(mPath)) {
		status_t err = parseMetaData(data_offset, chunk_data_size);
		status_t err = parseITunesMetaData(data_offset, chunk_data_size);

		if (err != OK) {
		return err;
		@@ -1681,6 +1683,23 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
		break;
		}

		case FOURCC('t', 'i', 't', 'l'):
		case FOURCC('p', 'e', 'r', 'f'):
		case FOURCC('a', 'u', 't', 'h'):
		case FOURCC('g', 'n', 'r', 'e'):
		case FOURCC('a', 'l', 'b', 'm'):
		case FOURCC('y', 'r', 'r', 'c'):
		{
		status_t err = parse3GPPMetaData(data_offset, chunk_data_size, depth);

		if (err != OK) {
		return err;
		}

		*offset += chunk_size;
		break;
		}

		case FOURCC('-', '-', '-', '-'):
		{
		mLastCommentMean.clear();
		@@ -1915,7 +1934,7 @@ status_t MPEG4Extractor::parseTrackHeader(
		return OK;
		}

		status_t MPEG4Extractor::parseMetaData(off64_t offset, size_t size) {
		status_t MPEG4Extractor::parseITunesMetaData(off64_t offset, size_t size) {
		if (size < 4) {
		return ERROR_MALFORMED;
		}
		@@ -2102,6 +2121,114 @@ status_t MPEG4Extractor::parseMetaData(off64_t offset, size_t size) {
		return OK;
		}

		status_t MPEG4Extractor::parse3GPPMetaData(off64_t offset, size_t size, int depth) {
		if (size < 4) {
		return ERROR_MALFORMED;
		}

		uint8_t *buffer = new uint8_t[size];
		if (mDataSource->readAt(
		offset, buffer, size) != (ssize_t)size) {
		delete[] buffer;
		buffer = NULL;

		return ERROR_IO;
		}

		uint32_t metadataKey = 0;
		switch (mPath[depth]) {
		case FOURCC('t', 'i', 't', 'l'):
		{
		metadataKey = kKeyTitle;
		break;
		}
		case FOURCC('p', 'e', 'r', 'f'):
		{
		metadataKey = kKeyArtist;
		break;
		}
		case FOURCC('a', 'u', 't', 'h'):
		{
		metadataKey = kKeyWriter;
		break;
		}
		case FOURCC('g', 'n', 'r', 'e'):
		{
		metadataKey = kKeyGenre;
		break;
		}
		case FOURCC('a', 'l', 'b', 'm'):
		{
		if (buffer[size - 1] != '\0') {
		char tmp[4];
		sprintf(tmp, "%u", buffer[size - 1]);

		mFileMetaData->setCString(kKeyCDTrackNumber, tmp);
		}

		metadataKey = kKeyAlbum;
		break;
		}
		case FOURCC('y', 'r', 'r', 'c'):
		{
		char tmp[5];
		uint16_t year = U16_AT(&buffer[4]);

		if (year < 10000) {
		sprintf(tmp, "%u", year);

		mFileMetaData->setCString(kKeyYear, tmp);
		}
		break;
		}

		default:
		break;
		}

		if (metadataKey > 0) {
		bool isUTF8 = true; // Common case
		char16_t *framedata = NULL;
		int len16 = 0; // Number of UTF-16 characters

		// smallest possible valid UTF-16 string w BOM: 0xfe 0xff 0x00 0x00
		if (size - 6 >= 4) {
		len16 = ((size - 6) / 2) - 1; // don't include 0x0000 terminator
		framedata = (char16_t *)(buffer + 6);
		if (0xfffe == *framedata) {
		// endianness marker (BOM) doesn't match host endianness
		for (int i = 0; i < len16; i++) {
		framedata[i] = bswap_16(framedata[i]);
		}
		// BOM is now swapped to 0xfeff, we will execute next block too
		}

		if (0xfeff == *framedata) {
		// Remove the BOM
		framedata++;
		len16--;
		isUTF8 = false;
		}
		// else normal non-zero-length UTF-8 string
		// we can't handle UTF-16 without BOM as there is no other
		// indication of encoding.
		}

		if (isUTF8) {
		mFileMetaData->setCString(metadataKey, (const char *)buffer + 6);
		} else {
		// Convert from UTF-16 string to UTF-8 string.
		String8 tmpUTF8str(framedata, len16);
		mFileMetaData->setCString(metadataKey, tmpUTF8str.string());
		}
		}

		delete[] buffer;
		buffer = NULL;

		return OK;
		}

		sp<MediaSource> MPEG4Extractor::getTrack(size_t index) {
		status_t err;
		if ((err = readMetaData()) != OK) {

media/libstagefright/include/MPEG4Extractor.h

+2 −1

Original line number	Diff line number	Diff line
		@@ -94,7 +94,8 @@ private:

		status_t readMetaData();
		status_t parseChunk(off64_t *offset, int depth);
		status_t parseMetaData(off64_t offset, size_t size);
		status_t parseITunesMetaData(off64_t offset, size_t size);
		status_t parse3GPPMetaData(off64_t offset, size_t size, int depth);

		status_t updateAudioTrackInfoFromESDS_MPEG4Audio(
		const void *esds_data, size_t esds_size);