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Parse gapless info from mp4 files

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Change-Id: I4c83d4e12e996dc29708268e68a4bb74b368c6f3
This commit is contained in:
Marco Nelissen
2012-03-20 10:05:06 -07:00
parent 8fca15f1f2
commit eb473f3627
2 changed files with 49 additions and 0 deletions
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45
media/libstagefright/MPEG4Extractor.cpp
View File

@@ -599,6 +599,7 @@ static void convertTimeToDate(int64_t time_1904, String8 *s) {
}
status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
ALOGV("entering parseChunk %lld/%d", *offset, depth);
uint32_t hdr[2];
if (mDataSource->readAt(*offset, hdr, 8) < 8) {
return ERROR_IO;
@@ -625,6 +626,7 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
char chunk[5];
MakeFourCCString(chunk_type, chunk);
ALOGV("chunk: %s @ %lld", chunk, *offset);
#if 0
static const char kWhitespace[] = " ";
@@ -1302,6 +1304,8 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
break;
}
case FOURCC('m', 'e', 'a', 'n'):
case FOURCC('n', 'a', 'm', 'e'):
case FOURCC('d', 'a', 't', 'a'):
{
if (mPath.size() == 6 && underMetaDataPath(mPath)) {
@@ -1437,6 +1441,15 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
break;
}
case FOURCC('-', '-', '-', '-'):
{
mLastCommentMean.clear();
mLastCommentName.clear();
mLastCommentData.clear();
*offset += chunk_size;
break;
}
default:
{
*offset += chunk_size;
@@ -1553,6 +1566,9 @@ status_t MPEG4Extractor::parseMetaData(off64_t offset, size_t size) {
uint32_t flags = U32_AT(buffer);
uint32_t metadataKey = 0;
char chunk[5];
MakeFourCCString(mPath[4], chunk);
ALOGV("meta: %s @ %lld", chunk, offset);
switch (mPath[4]) {
case FOURCC(0xa9, 'a', 'l', 'b'):
{
@@ -1632,6 +1648,35 @@ status_t MPEG4Extractor::parseMetaData(off64_t offset, size_t size) {
}
break;
}
case FOURCC('-', '-', '-', '-'):
{
buffer[size] = '\0';
switch (mPath[5]) {
case FOURCC('m', 'e', 'a', 'n'):
mLastCommentMean.setTo((const char *)buffer + 4);
break;
case FOURCC('n', 'a', 'm', 'e'):
mLastCommentName.setTo((const char *)buffer + 4);
break;
case FOURCC('d', 'a', 't', 'a'):
mLastCommentData.setTo((const char *)buffer + 8);
break;
}
if (mLastCommentMean == "com.apple.iTunes"
&& mLastCommentName == "iTunSMPB"
&& mLastCommentData.length() != 0) {
int32_t delay, padding;
if (sscanf(mLastCommentData,
" %*x %x %x %*x", &delay, &padding) == 2) {
mLastTrack->meta->setInt32(kKeyEncoderDelay, delay);
mLastTrack->meta->setInt32(kKeyEncoderPadding, padding);
}
mLastCommentMean.clear();
mLastCommentName.clear();
mLastCommentData.clear();
}
break;
}
default:
break;

4
media/libstagefright/include/MPEG4Extractor.h
View File

@@ -20,6 +20,7 @@
#include <media/stagefright/MediaExtractor.h>
#include <utils/Vector.h>
#include <utils/String8.h>
namespace android {
@@ -64,6 +65,9 @@ private:
sp<MetaData> mFileMetaData;
Vector<uint32_t> mPath;
String8 mLastCommentMean;
String8 mLastCommentName;
String8 mLastCommentData;
status_t readMetaData();
status_t parseChunk(off64_t *offset, int depth);