Support for ID3 version 1 (and 1.1) tags in .mp3 files. (43782d3b) · Commits · e / os / android_frameworks_base

media/libstagefright/id3/ID3.cpp

+147 −11

Original line number	Diff line number	Diff line
		@@ -33,7 +33,11 @@ ID3::ID3(const sp<DataSource> &source)
		mSize(0),
		mFirstFrameOffset(0),
		mVersion(ID3_UNKNOWN) {
		mIsValid = parse(source);
		mIsValid = parseV2(source);

		if (!mIsValid) {
		mIsValid = parseV1(source);
		}
		}

		ID3::~ID3() {
		@@ -51,7 +55,7 @@ ID3::Version ID3::version() const {
		return mVersion;
		}

		bool ID3::parse(const sp<DataSource> &source) {
		bool ID3::parseV2(const sp<DataSource> &source) {
		struct id3_header {
		char id[3];
		uint8_t version_major;
		@@ -119,7 +123,7 @@ bool ID3::parse(const sp<DataSource> &source) {
		}

		if (header.flags & 0x80) {
		LOGI("removing unsynchronization");
		LOGV("removing unsynchronization");
		removeUnsynchronization();
		}

		@@ -128,12 +132,18 @@ bool ID3::parse(const sp<DataSource> &source) {
		// Version 2.3 has an optional extended header.

		if (mSize < 4) {
		free(mData);
		mData = NULL;

		return false;
		}

		size_t extendedHeaderSize = U32_AT(&mData[0]) + 4;

		if (extendedHeaderSize > mSize) {
		free(mData);
		mData = NULL;

		return false;
		}

		@@ -147,6 +157,9 @@ bool ID3::parse(const sp<DataSource> &source) {
		size_t paddingSize = U32_AT(&mData[6]);

		if (mFirstFrameOffset + paddingSize > mSize) {
		free(mData);
		mData = NULL;

		return false;
		}

		@@ -154,7 +167,7 @@ bool ID3::parse(const sp<DataSource> &source) {
		}

		if (extendedFlags & 0x8000) {
		LOGI("have crc");
		LOGV("have crc");
		}
		}
		}
		@@ -221,9 +234,37 @@ void ID3::Iterator::getID(String8 *id) const {

		if (mParent.mVersion == ID3_V2_2) {
		id->setTo((const char *)&mParent.mData[mOffset], 3);
		} else {
		CHECK_EQ(mParent.mVersion, ID3_V2_3);
		} else if (mParent.mVersion == ID3_V2_3) {
		id->setTo((const char *)&mParent.mData[mOffset], 4);
		} else {
		CHECK(mParent.mVersion == ID3_V1 \|\| mParent.mVersion == ID3_V1_1);

		switch (mOffset) {
		case 3:
		id->setTo("TT2");
		break;
		case 33:
		id->setTo("TP1");
		break;
		case 63:
		id->setTo("TAL");
		break;
		case 93:
		id->setTo("TYE");
		break;
		case 97:
		id->setTo("COM");
		break;
		case 126:
		id->setTo("TRK");
		break;
		case 127:
		id->setTo("TCO");
		break;
		default:
		CHECK(!"should not be here.");
		break;
		}
		}
		}

		@@ -273,6 +314,20 @@ void ID3::Iterator::getString(String8 *id) const {
		return;
		}

		if (mParent.mVersion == ID3_V1 \|\| mParent.mVersion == ID3_V1_1) {
		if (mOffset == 126 \|\| mOffset == 127) {
		// Special treatment for the track number and genre.
		char tmp[16];
		sprintf(tmp, "%d", (int)*mFrameData);

		id->setTo(tmp);
		return;
		}

		id->setTo((const char *)mFrameData, mFrameSize);
		return;
		}

		size_t n = mFrameSize - getHeaderLength() - 1;

		if (*mFrameData == 0x00) {
		@@ -299,9 +354,11 @@ const uint8_t ID3::Iterator::getData(size_t length) const {
		size_t ID3::Iterator::getHeaderLength() const {
		if (mParent.mVersion == ID3_V2_2) {
		return 6;
		} else {
		CHECK_EQ(mParent.mVersion, ID3_V2_3);
		} else if (mParent.mVersion == ID3_V2_3) {
		return 10;
		} else {
		CHECK(mParent.mVersion == ID3_V1 \|\| mParent.mVersion == ID3_V1_1);
		return 0;
		}
		}

		@@ -345,9 +402,7 @@ void ID3::Iterator::findFrame() {
		if (!strcmp(id, mID)) {
		break;
		}
		} else {
		CHECK_EQ(mParent.mVersion, ID3_V2_3);

		} else if (mParent.mVersion == ID3_V2_3) {
		if (mOffset + 10 > mParent.mSize) {
		return;
		}
		@@ -377,6 +432,52 @@ void ID3::Iterator::findFrame() {
		if (!strcmp(id, mID)) {
		break;
		}
		} else {
		CHECK(mParent.mVersion == ID3_V1 \|\| mParent.mVersion == ID3_V1_1);

		if (mOffset >= mParent.mSize) {
		return;
		}

		mFrameData = &mParent.mData[mOffset];

		switch (mOffset) {
		case 3:
		case 33:
		case 63:
		mFrameSize = 30;
		break;
		case 93:
		mFrameSize = 4;
		break;
		case 97:
		if (mParent.mVersion == ID3_V1) {
		mFrameSize = 30;
		} else {
		mFrameSize = 29;
		}
		break;
		case 126:
		mFrameSize = 1;
		break;
		case 127:
		mFrameSize = 1;
		break;
		default:
		CHECK(!"Should not be here, invalid offset.");
		break;
		}

		if (!mID) {
		break;
		}

		String8 id;
		getID(&id);

		if (id == mID) {
		break;
		}
		}

		mOffset += mFrameSize;
		@@ -461,5 +562,40 @@ ID3::getAlbumArt(size_t length, String8 mime) const {
		return NULL;
		}

		bool ID3::parseV1(const sp<DataSource> &source) {
		const size_t V1_TAG_SIZE = 128;

		off_t size;
		if (source->getSize(&size) != OK \|\| size < (off_t)V1_TAG_SIZE) {
		return false;
		}

		mData = (uint8_t *)malloc(V1_TAG_SIZE);
		if (source->readAt(size - V1_TAG_SIZE, mData, V1_TAG_SIZE)
		!= (ssize_t)V1_TAG_SIZE) {
		free(mData);
		mData = NULL;

		return false;
		}

		if (memcmp("TAG", mData, 3)) {
		free(mData);
		mData = NULL;

		return false;
		}

		mSize = V1_TAG_SIZE;
		mFirstFrameOffset = 3;

		if (mData[V1_TAG_SIZE - 3] != 0) {
		mVersion = ID3_V1;
		} else {
		mVersion = ID3_V1_1;
		}

		return true;
		}

		} // namespace android

media/libstagefright/id3/testid3.cpp

+8 −0

Original line number	Diff line number	Diff line
		@@ -16,6 +16,8 @@

		#include "../include/ID3.h"

		#include <sys/stat.h>

		#include <ctype.h>
		#include <dirent.h>

		@@ -108,6 +110,12 @@ void scanFile(const char *path) {
		}

		void scan(const char *path) {
		struct stat st;
		if (stat(path, &st) == 0 && S_ISREG(st.st_mode)) {
		scanFile(path);
		return;
		}

		DIR *dir = opendir(path);

		if (dir == NULL) {

media/libstagefright/include/ID3.h

+4 −1

Original line number	Diff line number	Diff line
		@@ -28,6 +28,8 @@ struct String8;
		struct ID3 {
		enum Version {
		ID3_UNKNOWN,
		ID3_V1,
		ID3_V1_1,
		ID3_V2_2,
		ID3_V2_3
		};
		@@ -74,7 +76,8 @@ private:
		size_t mFirstFrameOffset;
		Version mVersion;

		bool parse(const sp<DataSource> &source);
		bool parseV1(const sp<DataSource> &source);
		bool parseV2(const sp<DataSource> &source);
		void removeUnsynchronization();

		ID3(const ID3 &);