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Diffstat (limited to 'media/libstagefright/MPEG4Extractor.cpp')
-rw-r--r--media/libstagefright/MPEG4Extractor.cpp258
1 files changed, 235 insertions, 23 deletions
diff --git a/media/libstagefright/MPEG4Extractor.cpp b/media/libstagefright/MPEG4Extractor.cpp
index 910ae32..28a9ed9 100644
--- a/media/libstagefright/MPEG4Extractor.cpp
+++ b/media/libstagefright/MPEG4Extractor.cpp
@@ -739,6 +739,17 @@ static bool underMetaDataPath(const Vector<uint32_t> &path) {
&& path[3] == FOURCC('i', 'l', 's', 't');
}
+static bool underQTMetaPath(const Vector<uint32_t> &path, int32_t depth) {
+ return path.size() >= 2
+ && path[0] == FOURCC('m', 'o', 'o', 'v')
+ && path[1] == FOURCC('m', 'e', 't', 'a')
+ && (depth == 2
+ || (depth == 3
+ && (path[2] == FOURCC('h', 'd', 'l', 'r')
+ || path[2] == FOURCC('i', 'l', 's', 't')
+ || path[2] == FOURCC('k', 'e', 'y', 's'))));
+}
+
// Given a time in seconds since Jan 1 1904, produce a human-readable string.
static void convertTimeToDate(int64_t time_1904, String8 *s) {
time_t time_1970 = time_1904 - (((66 * 365 + 17) * 24) * 3600);
@@ -874,6 +885,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
}
}
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
mLastTrack->sampleTable = new SampleTable(mDataSource);
}
@@ -1028,6 +1042,10 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
}
original_fourcc = ntohl(original_fourcc);
ALOGV("read original format: %d", original_fourcc);
+
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
mLastTrack->meta->setCString(kKeyMIMEType, FourCC2MIME(original_fourcc));
uint32_t num_channels = 0;
uint32_t sample_rate = 0;
@@ -1083,6 +1101,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
return ERROR_IO;
}
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
mLastTrack->meta->setInt32(kKeyCryptoMode, defaultAlgorithmId);
mLastTrack->meta->setInt32(kKeyCryptoDefaultIVSize, defaultIVSize);
mLastTrack->meta->setData(kKeyCryptoKey, 'tenc', defaultKeyId, 16);
@@ -1198,7 +1219,7 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
duration = ntohl(duration32);
}
}
- if (duration != 0) {
+ if (duration != 0 && mLastTrack->timescale != 0) {
mLastTrack->meta->setInt64(
kKeyDuration, (duration * 1000000) / mLastTrack->timescale);
}
@@ -1262,6 +1283,10 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
// display the timed text.
// For encrypted files, there may also be more than one entry.
const char *mime;
+
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
CHECK(mLastTrack->meta->findCString(kKeyMIMEType, &mime));
if (strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP) &&
strcasecmp(mime, "application/octet-stream")) {
@@ -1308,6 +1333,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
uint16_t sample_size = U16_AT(&buffer[18]);
uint32_t sample_rate = U32_AT(&buffer[24]) >> 16;
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
if (chunk_type != FOURCC('e', 'n', 'c', 'a')) {
// if the chunk type is enca, we'll get the type from the sinf/frma box later
mLastTrack->meta->setCString(kKeyMIMEType, FourCC2MIME(chunk_type));
@@ -1369,6 +1397,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
// printf("*** coding='%s' width=%d height=%d\n",
// chunk, width, height);
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
if (chunk_type != FOURCC('e', 'n', 'c', 'v')) {
// if the chunk type is encv, we'll get the type from the sinf/frma box later
mLastTrack->meta->setCString(kKeyMIMEType, FourCC2MIME(chunk_type));
@@ -1394,6 +1425,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
case FOURCC('s', 't', 'c', 'o'):
case FOURCC('c', 'o', '6', '4'):
{
+ if ((mLastTrack == NULL) || (mLastTrack->sampleTable == NULL))
+ return ERROR_MALFORMED;
+
status_t err =
mLastTrack->sampleTable->setChunkOffsetParams(
chunk_type, data_offset, chunk_data_size);
@@ -1409,6 +1443,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
case FOURCC('s', 't', 's', 'c'):
{
+ if ((mLastTrack == NULL) || (mLastTrack->sampleTable == NULL))
+ return ERROR_MALFORMED;
+
status_t err =
mLastTrack->sampleTable->setSampleToChunkParams(
data_offset, chunk_data_size);
@@ -1425,6 +1462,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
case FOURCC('s', 't', 's', 'z'):
case FOURCC('s', 't', 'z', '2'):
{
+ if ((mLastTrack == NULL) || (mLastTrack->sampleTable == NULL))
+ return ERROR_MALFORMED;
+
status_t err =
mLastTrack->sampleTable->setSampleSizeParams(
chunk_type, data_offset, chunk_data_size);
@@ -1494,6 +1534,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
case FOURCC('s', 't', 't', 's'):
{
+ if ((mLastTrack == NULL) || (mLastTrack->sampleTable == NULL))
+ return ERROR_MALFORMED;
+
*offset += chunk_size;
status_t err =
@@ -1509,6 +1552,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
case FOURCC('c', 't', 't', 's'):
{
+ if ((mLastTrack == NULL) || (mLastTrack->sampleTable == NULL))
+ return ERROR_MALFORMED;
+
*offset += chunk_size;
status_t err =
@@ -1524,6 +1570,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
case FOURCC('s', 't', 's', 's'):
{
+ if ((mLastTrack == NULL) || (mLastTrack->sampleTable == NULL))
+ return ERROR_MALFORMED;
+
*offset += chunk_size;
status_t err =
@@ -1596,6 +1645,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
return ERROR_MALFORMED;
}
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
mLastTrack->meta->setData(
kKeyESDS, kTypeESDS, &buffer[4], chunk_data_size - 4);
@@ -1628,6 +1680,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
return ERROR_IO;
}
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
mLastTrack->meta->setData(
kKeyAVCC, kTypeAVCC, buffer->data(), chunk_data_size);
@@ -1642,6 +1697,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
return ERROR_IO;
}
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
mLastTrack->meta->setData(
kKeyHVCC, kTypeHVCC, buffer->data(), chunk_data_size);
@@ -1675,6 +1733,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
return ERROR_IO;
}
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
mLastTrack->meta->setData(kKeyD263, kTypeD263, buffer, chunk_data_size);
break;
@@ -1682,31 +1743,35 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
case FOURCC('m', 'e', 't', 'a'):
{
- uint8_t buffer[4];
- if (chunk_data_size < (off64_t)sizeof(buffer)) {
- *offset += chunk_size;
- return ERROR_MALFORMED;
- }
+ off64_t stop_offset = *offset + chunk_size;
+ *offset = data_offset;
+ bool isParsingMetaKeys = underQTMetaPath(mPath, 2);
+ if (!isParsingMetaKeys) {
+ uint8_t buffer[4];
+ if (chunk_data_size < (off64_t)sizeof(buffer)) {
+ *offset += chunk_size;
+ return ERROR_MALFORMED;
+ }
- if (mDataSource->readAt(
- data_offset, buffer, 4) < 4) {
- *offset += chunk_size;
- return ERROR_IO;
- }
+ if (mDataSource->readAt(
+ data_offset, buffer, 4) < 4) {
+ *offset += chunk_size;
+ return ERROR_IO;
+ }
- if (U32_AT(buffer) != 0) {
- // Should be version 0, flags 0.
+ if (U32_AT(buffer) != 0) {
+ // Should be version 0, flags 0.
- // If it's not, let's assume this is one of those
- // apparently malformed chunks that don't have flags
- // and completely different semantics than what's
- // in the MPEG4 specs and skip it.
- *offset += chunk_size;
- return OK;
+ // If it's not, let's assume this is one of those
+ // apparently malformed chunks that don't have flags
+ // and completely different semantics than what's
+ // in the MPEG4 specs and skip it.
+ *offset += chunk_size;
+ return OK;
+ }
+ *offset += sizeof(buffer);
}
- off64_t stop_offset = *offset + chunk_size;
- *offset = data_offset + sizeof(buffer);
while (*offset < stop_offset) {
status_t err = parseChunk(offset, depth + 1);
if (err != OK) {
@@ -1772,7 +1837,7 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
}
duration = d32;
}
- if (duration != 0) {
+ if (duration != 0 && mHeaderTimescale != 0) {
mFileMetaData->setInt64(kKeyDuration, duration * 1000000 / mHeaderTimescale);
}
@@ -1821,7 +1886,7 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
return ERROR_MALFORMED;
}
- if (duration != 0) {
+ if (duration != 0 && mHeaderTimescale != 0) {
mFileMetaData->setInt64(kKeyDuration, duration * 1000000 / mHeaderTimescale);
}
@@ -1850,12 +1915,19 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
{
*offset += chunk_size;
+ if (underQTMetaPath(mPath, 3)) {
+ break;
+ }
+
uint32_t buffer;
if (mDataSource->readAt(
data_offset + 8, &buffer, 4) < 4) {
return ERROR_IO;
}
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
uint32_t type = ntohl(buffer);
// For the 3GPP file format, the handler-type within the 'hdlr' box
// shall be 'text'. We also want to support 'sbtl' handler type
@@ -1867,6 +1939,16 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
break;
}
+ case FOURCC('k', 'e', 'y', 's'):
+ {
+ *offset += chunk_size;
+
+ if (underQTMetaPath(mPath, 3)) {
+ parseQTMetaKey(data_offset, chunk_data_size);
+ }
+ break;
+ }
+
case FOURCC('t', 'r', 'e', 'x'):
{
*offset += chunk_size;
@@ -1888,6 +1970,9 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
case FOURCC('t', 'x', '3', 'g'):
{
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
uint32_t type;
const void *data;
size_t size = 0;
@@ -1994,6 +2079,12 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
default:
{
+ // check if we're parsing 'ilst' for meta keys
+ // if so, treat type as a number (key-id).
+ if (underQTMetaPath(mPath, 3)) {
+ parseQTMetaVal(chunk_type, data_offset, chunk_data_size);
+ }
+
*offset += chunk_size;
break;
}
@@ -2029,6 +2120,8 @@ status_t MPEG4Extractor::parseSegmentIndex(off64_t offset, size_t size) {
return ERROR_MALFORMED;
}
ALOGV("sidx refid/timescale: %d/%d", referenceId, timeScale);
+ if (timeScale == 0)
+ return ERROR_MALFORMED;
uint64_t earliestPresentationTime;
uint64_t firstOffset;
@@ -2112,6 +2205,9 @@ status_t MPEG4Extractor::parseSegmentIndex(off64_t offset, size_t size) {
uint64_t sidxDuration = total_duration * 1000000 / timeScale;
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
int64_t metaDuration;
if (!mLastTrack->meta->findInt64(kKeyDuration, &metaDuration) || metaDuration == 0) {
mLastTrack->meta->setInt64(kKeyDuration, sidxDuration);
@@ -2119,7 +2215,108 @@ status_t MPEG4Extractor::parseSegmentIndex(off64_t offset, size_t size) {
return OK;
}
+status_t MPEG4Extractor::parseQTMetaKey(off64_t offset, size_t size) {
+ if (size < 8) {
+ return ERROR_MALFORMED;
+ }
+ uint32_t count;
+ if (!mDataSource->getUInt32(offset + 4, &count)) {
+ return ERROR_MALFORMED;
+ }
+
+ if (mMetaKeyMap.size() > 0) {
+ ALOGW("'keys' atom seen again, discarding existing entries");
+ mMetaKeyMap.clear();
+ }
+
+ off64_t keyOffset = offset + 8;
+ off64_t stopOffset = offset + size;
+ for (size_t i = 1; i <= count; i++) {
+ if (keyOffset + 8 > stopOffset) {
+ return ERROR_MALFORMED;
+ }
+
+ uint32_t keySize;
+ if (!mDataSource->getUInt32(keyOffset, &keySize)
+ || keySize < 8
+ || keyOffset + keySize > stopOffset) {
+ return ERROR_MALFORMED;
+ }
+
+ uint32_t type;
+ if (!mDataSource->getUInt32(keyOffset + 4, &type)
+ || type != FOURCC('m', 'd', 't', 'a')) {
+ return ERROR_MALFORMED;
+ }
+
+ keySize -= 8;
+ keyOffset += 8;
+
+ sp<ABuffer> keyData = new ABuffer(keySize);
+ if (keyData->data() == NULL) {
+ return ERROR_MALFORMED;
+ }
+ if (mDataSource->readAt(
+ keyOffset, keyData->data(), keySize) < (ssize_t) keySize) {
+ return ERROR_MALFORMED;
+ }
+
+ AString key((const char *)keyData->data(), keySize);
+ mMetaKeyMap.add(i, key);
+
+ keyOffset += keySize;
+ }
+ return OK;
+}
+
+status_t MPEG4Extractor::parseQTMetaVal(
+ int32_t keyId, off64_t offset, size_t size) {
+ ssize_t index = mMetaKeyMap.indexOfKey(keyId);
+ if (index < 0) {
+ // corresponding key is not present, ignore
+ return ERROR_MALFORMED;
+ }
+
+ if (size <= 16) {
+ return ERROR_MALFORMED;
+ }
+ uint32_t dataSize;
+ if (!mDataSource->getUInt32(offset, &dataSize)
+ || dataSize > size || dataSize <= 16) {
+ return ERROR_MALFORMED;
+ }
+ uint32_t atomFourCC;
+ if (!mDataSource->getUInt32(offset + 4, &atomFourCC)
+ || atomFourCC != FOURCC('d', 'a', 't', 'a')) {
+ return ERROR_MALFORMED;
+ }
+ uint32_t dataType;
+ if (!mDataSource->getUInt32(offset + 8, &dataType)
+ || ((dataType & 0xff000000) != 0)) {
+ // not well-known type
+ return ERROR_MALFORMED;
+ }
+
+ dataSize -= 16;
+ offset += 16;
+
+ if (dataType == 23 && dataSize >= 4) {
+ // BE Float32
+ uint32_t val;
+ if (!mDataSource->getUInt32(offset, &val)) {
+ return ERROR_MALFORMED;
+ }
+ if (!strcasecmp(mMetaKeyMap[index].c_str(), "com.android.capture.fps")) {
+ mFileMetaData->setFloat(kKeyCaptureFramerate, *(float *)&val);
+ }
+ } else {
+ // add more keys if needed
+ ALOGV("ignoring key: type %d, size %d", dataType, dataSize);
+ }
+
+ return OK;
+}
status_t MPEG4Extractor::parseTrackHeader(
off64_t data_offset, off64_t data_size) {
@@ -2162,6 +2359,9 @@ status_t MPEG4Extractor::parseTrackHeader(
return ERROR_UNSUPPORTED;
}
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
mLastTrack->meta->setInt32(kKeyTrackID, id);
size_t matrixOffset = dynSize + 16;
@@ -2344,6 +2544,9 @@ status_t MPEG4Extractor::parseITunesMetaData(off64_t offset, size_t size) {
int32_t delay, padding;
if (sscanf(mLastCommentData,
" %*x %x %x %*x", &delay, &padding) == 2) {
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
mLastTrack->meta->setInt32(kKeyEncoderDelay, delay);
mLastTrack->meta->setInt32(kKeyEncoderPadding, padding);
}
@@ -2711,6 +2914,9 @@ status_t MPEG4Extractor::updateAudioTrackInfoFromESDS_MPEG4Audio(
if (objectTypeIndication == 0xe1) {
// This isn't MPEG4 audio at all, it's QCELP 14k...
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
mLastTrack->meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_QCELP);
return OK;
}
@@ -2759,6 +2965,9 @@ status_t MPEG4Extractor::updateAudioTrackInfoFromESDS_MPEG4Audio(
objectType = 32 + br.getBits(6);
}
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
//keep AOT type
mLastTrack->meta->setInt32(kKeyAACAOT, objectType);
@@ -2929,6 +3138,9 @@ status_t MPEG4Extractor::updateAudioTrackInfoFromESDS_MPEG4Audio(
return ERROR_UNSUPPORTED;
}
+ if (mLastTrack == NULL)
+ return ERROR_MALFORMED;
+
int32_t prevSampleRate;
CHECK(mLastTrack->meta->findInt32(kKeySampleRate, &prevSampleRate));
generated by cgit v1.1 at 2024-06-08 10:25:53 +0000