Make extractors separate libraries
instead of being integrated into libstagefright
Test: thoroughly
Change-Id: I11cdfde6d2daf248c8e0f99237db1c74be260eb0
diff --git a/media/extractors/aac/AACExtractor.cpp b/media/extractors/aac/AACExtractor.cpp
new file mode 100644
index 0000000..ce5f976
--- /dev/null
+++ b/media/extractors/aac/AACExtractor.cpp
@@ -0,0 +1,405 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "AACExtractor"
+#include <utils/Log.h>
+
+#include "AACExtractor.h"
+#include "include/avc_utils.h"
+
+#include <media/stagefright/foundation/ABuffer.h>
+#include <media/stagefright/foundation/AMessage.h>
+#include <media/stagefright/foundation/ADebug.h>
+#include <media/stagefright/DataSource.h>
+#include <media/stagefright/MediaBufferGroup.h>
+#include <media/stagefright/MediaDefs.h>
+#include <media/stagefright/MediaErrors.h>
+#include <media/stagefright/MediaSource.h>
+#include <media/stagefright/MetaData.h>
+#include <utils/String8.h>
+
+namespace android {
+
+class AACSource : public MediaSource {
+public:
+ AACSource(const sp<DataSource> &source,
+ const sp<MetaData> &meta,
+ const Vector<uint64_t> &offset_vector,
+ int64_t frame_duration_us);
+
+ virtual status_t start(MetaData *params = NULL);
+ virtual status_t stop();
+
+ virtual sp<MetaData> getFormat();
+
+ virtual status_t read(
+ MediaBuffer **buffer, const ReadOptions *options = NULL);
+
+protected:
+ virtual ~AACSource();
+
+private:
+ static const size_t kMaxFrameSize;
+ sp<DataSource> mDataSource;
+ sp<MetaData> mMeta;
+
+ off64_t mOffset;
+ int64_t mCurrentTimeUs;
+ bool mStarted;
+ MediaBufferGroup *mGroup;
+
+ Vector<uint64_t> mOffsetVector;
+ int64_t mFrameDurationUs;
+
+ AACSource(const AACSource &);
+ AACSource &operator=(const AACSource &);
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
+// Returns the sample rate based on the sampling frequency index
+uint32_t get_sample_rate(const uint8_t sf_index)
+{
+ static const uint32_t sample_rates[] =
+ {
+ 96000, 88200, 64000, 48000, 44100, 32000,
+ 24000, 22050, 16000, 12000, 11025, 8000
+ };
+
+ if (sf_index < sizeof(sample_rates) / sizeof(sample_rates[0])) {
+ return sample_rates[sf_index];
+ }
+
+ return 0;
+}
+
+// Returns the frame length in bytes as described in an ADTS header starting at the given offset,
+// or 0 if the size can't be read due to an error in the header or a read failure.
+// The returned value is the AAC frame size with the ADTS header length (regardless of
+// the presence of the CRC).
+// If headerSize is non-NULL, it will be used to return the size of the header of this ADTS frame.
+static size_t getAdtsFrameLength(const sp<DataSource> &source, off64_t offset, size_t* headerSize) {
+
+ const size_t kAdtsHeaderLengthNoCrc = 7;
+ const size_t kAdtsHeaderLengthWithCrc = 9;
+
+ size_t frameSize = 0;
+
+ uint8_t syncword[2];
+ if (source->readAt(offset, &syncword, 2) != 2) {
+ return 0;
+ }
+ if ((syncword[0] != 0xff) || ((syncword[1] & 0xf6) != 0xf0)) {
+ return 0;
+ }
+
+ uint8_t protectionAbsent;
+ if (source->readAt(offset + 1, &protectionAbsent, 1) < 1) {
+ return 0;
+ }
+ protectionAbsent &= 0x1;
+
+ uint8_t header[3];
+ if (source->readAt(offset + 3, &header, 3) < 3) {
+ return 0;
+ }
+
+ frameSize = (header[0] & 0x3) << 11 | header[1] << 3 | header[2] >> 5;
+
+ // protectionAbsent is 0 if there is CRC
+ size_t headSize = protectionAbsent ? kAdtsHeaderLengthNoCrc : kAdtsHeaderLengthWithCrc;
+ if (headSize > frameSize) {
+ return 0;
+ }
+ if (headerSize != NULL) {
+ *headerSize = headSize;
+ }
+
+ return frameSize;
+}
+
+AACExtractor::AACExtractor(
+ const sp<DataSource> &source, const sp<AMessage> &_meta)
+ : mDataSource(source),
+ mInitCheck(NO_INIT),
+ mFrameDurationUs(0) {
+ sp<AMessage> meta = _meta;
+
+ if (meta == NULL) {
+ ALOGE("no metadata specified");
+ return;
+ }
+
+ int64_t offset;
+ CHECK(meta->findInt64("offset", &offset));
+
+ uint8_t profile, sf_index, channel, header[2];
+ if (mDataSource->readAt(offset + 2, &header, 2) < 2) {
+ return;
+ }
+
+ profile = (header[0] >> 6) & 0x3;
+ sf_index = (header[0] >> 2) & 0xf;
+ uint32_t sr = get_sample_rate(sf_index);
+ if (sr == 0) {
+ return;
+ }
+ channel = (header[0] & 0x1) << 2 | (header[1] >> 6);
+
+ mMeta = MakeAACCodecSpecificData(profile, sf_index, channel);
+
+ off64_t streamSize, numFrames = 0;
+ size_t frameSize = 0;
+ int64_t duration = 0;
+
+ if (mDataSource->getSize(&streamSize) == OK) {
+ while (offset < streamSize) {
+ if ((frameSize = getAdtsFrameLength(source, offset, NULL)) == 0) {
+ ALOGW("prematured AAC stream (%lld vs %lld)",
+ (long long)offset, (long long)streamSize);
+ break;
+ }
+
+ mOffsetVector.push(offset);
+
+ offset += frameSize;
+ numFrames ++;
+ }
+
+ // Round up and get the duration
+ mFrameDurationUs = (1024 * 1000000ll + (sr - 1)) / sr;
+ duration = numFrames * mFrameDurationUs;
+ mMeta->setInt64(kKeyDuration, duration);
+ }
+
+ mInitCheck = OK;
+}
+
+AACExtractor::~AACExtractor() {
+}
+
+sp<MetaData> AACExtractor::getMetaData() {
+ sp<MetaData> meta = new MetaData;
+
+ if (mInitCheck != OK) {
+ return meta;
+ }
+
+ meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_AAC_ADTS);
+
+ return meta;
+}
+
+size_t AACExtractor::countTracks() {
+ return mInitCheck == OK ? 1 : 0;
+}
+
+sp<MediaSource> AACExtractor::getTrack(size_t index) {
+ if (mInitCheck != OK || index != 0) {
+ return NULL;
+ }
+
+ return new AACSource(mDataSource, mMeta, mOffsetVector, mFrameDurationUs);
+}
+
+sp<MetaData> AACExtractor::getTrackMetaData(size_t index, uint32_t /* flags */) {
+ if (mInitCheck != OK || index != 0) {
+ return NULL;
+ }
+
+ return mMeta;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+// 8192 = 2^13, 13bit AAC frame size (in bytes)
+const size_t AACSource::kMaxFrameSize = 8192;
+
+AACSource::AACSource(
+ const sp<DataSource> &source, const sp<MetaData> &meta,
+ const Vector<uint64_t> &offset_vector,
+ int64_t frame_duration_us)
+ : mDataSource(source),
+ mMeta(meta),
+ mOffset(0),
+ mCurrentTimeUs(0),
+ mStarted(false),
+ mGroup(NULL),
+ mOffsetVector(offset_vector),
+ mFrameDurationUs(frame_duration_us) {
+}
+
+AACSource::~AACSource() {
+ if (mStarted) {
+ stop();
+ }
+}
+
+status_t AACSource::start(MetaData * /* params */) {
+ CHECK(!mStarted);
+
+ if (mOffsetVector.empty()) {
+ mOffset = 0;
+ } else {
+ mOffset = mOffsetVector.itemAt(0);
+ }
+
+ mCurrentTimeUs = 0;
+ mGroup = new MediaBufferGroup;
+ mGroup->add_buffer(new MediaBuffer(kMaxFrameSize));
+ mStarted = true;
+
+ return OK;
+}
+
+status_t AACSource::stop() {
+ CHECK(mStarted);
+
+ delete mGroup;
+ mGroup = NULL;
+
+ mStarted = false;
+ return OK;
+}
+
+sp<MetaData> AACSource::getFormat() {
+ return mMeta;
+}
+
+status_t AACSource::read(
+ MediaBuffer **out, const ReadOptions *options) {
+ *out = NULL;
+
+ int64_t seekTimeUs;
+ ReadOptions::SeekMode mode;
+ if (options && options->getSeekTo(&seekTimeUs, &mode)) {
+ if (mFrameDurationUs > 0) {
+ int64_t seekFrame = seekTimeUs / mFrameDurationUs;
+ mCurrentTimeUs = seekFrame * mFrameDurationUs;
+
+ mOffset = mOffsetVector.itemAt(seekFrame);
+ }
+ }
+
+ size_t frameSize, frameSizeWithoutHeader, headerSize;
+ if ((frameSize = getAdtsFrameLength(mDataSource, mOffset, &headerSize)) == 0) {
+ return ERROR_END_OF_STREAM;
+ }
+
+ MediaBuffer *buffer;
+ status_t err = mGroup->acquire_buffer(&buffer);
+ if (err != OK) {
+ return err;
+ }
+
+ frameSizeWithoutHeader = frameSize - headerSize;
+ if (mDataSource->readAt(mOffset + headerSize, buffer->data(),
+ frameSizeWithoutHeader) != (ssize_t)frameSizeWithoutHeader) {
+ buffer->release();
+ buffer = NULL;
+
+ return ERROR_IO;
+ }
+
+ buffer->set_range(0, frameSizeWithoutHeader);
+ buffer->meta_data()->setInt64(kKeyTime, mCurrentTimeUs);
+ buffer->meta_data()->setInt32(kKeyIsSyncFrame, 1);
+
+ mOffset += frameSize;
+ mCurrentTimeUs += mFrameDurationUs;
+
+ *out = buffer;
+ return OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+static MediaExtractor* CreateExtractor(
+ const sp<DataSource> &source,
+ const sp<AMessage>& meta) {
+ return new AACExtractor(source, meta);
+}
+
+static MediaExtractor::CreatorFunc Sniff(
+ const sp<DataSource> &source, String8 *mimeType, float *confidence,
+ sp<AMessage> *meta) {
+ off64_t pos = 0;
+
+ for (;;) {
+ uint8_t id3header[10];
+ if (source->readAt(pos, id3header, sizeof(id3header))
+ < (ssize_t)sizeof(id3header)) {
+ return NULL;
+ }
+
+ if (memcmp("ID3", id3header, 3)) {
+ break;
+ }
+
+ // Skip the ID3v2 header.
+
+ size_t len =
+ ((id3header[6] & 0x7f) << 21)
+ | ((id3header[7] & 0x7f) << 14)
+ | ((id3header[8] & 0x7f) << 7)
+ | (id3header[9] & 0x7f);
+
+ len += 10;
+
+ pos += len;
+
+ ALOGV("skipped ID3 tag, new starting offset is %lld (0x%016llx)",
+ (long long)pos, (long long)pos);
+ }
+
+ uint8_t header[2];
+
+ if (source->readAt(pos, &header, 2) != 2) {
+ return NULL;
+ }
+
+ // ADTS syncword
+ if ((header[0] == 0xff) && ((header[1] & 0xf6) == 0xf0)) {
+ *mimeType = MEDIA_MIMETYPE_AUDIO_AAC_ADTS;
+ *confidence = 0.2;
+
+ *meta = new AMessage;
+ (*meta)->setInt64("offset", pos);
+
+ return CreateExtractor;
+ }
+
+ return NULL;
+}
+
+
+extern "C" {
+// This is the only symbol that needs to be exported
+__attribute__ ((visibility ("default")))
+MediaExtractor::ExtractorDef GETEXTRACTORDEF() {
+ return {
+ MediaExtractor::EXTRACTORDEF_VERSION,
+ UUID("4fd80eae-03d2-4d72-9eb9-48fa6bb54613"),
+ 1, // version
+ "AAC Extractor",
+ Sniff
+ };
+}
+
+} // extern "C"
+
+} // namespace android
diff --git a/media/extractors/aac/AACExtractor.h b/media/extractors/aac/AACExtractor.h
new file mode 100644
index 0000000..91e2eed
--- /dev/null
+++ b/media/extractors/aac/AACExtractor.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef AAC_EXTRACTOR_H_
+
+#define AAC_EXTRACTOR_H_
+
+#include <media/stagefright/MediaExtractor.h>
+
+#include <utils/Vector.h>
+
+namespace android {
+
+struct AMessage;
+class String8;
+
+class AACExtractor : public MediaExtractor {
+public:
+ AACExtractor(const sp<DataSource> &source, const sp<AMessage> &meta);
+
+ virtual size_t countTracks();
+ virtual sp<MediaSource> getTrack(size_t index);
+ virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags);
+
+ virtual sp<MetaData> getMetaData();
+ virtual const char * name() { return "AACExtractor"; }
+
+protected:
+ virtual ~AACExtractor();
+
+private:
+ sp<DataSource> mDataSource;
+ sp<MetaData> mMeta;
+ status_t mInitCheck;
+
+ Vector<uint64_t> mOffsetVector;
+ int64_t mFrameDurationUs;
+
+ AACExtractor(const AACExtractor &);
+ AACExtractor &operator=(const AACExtractor &);
+};
+
+bool SniffAAC(
+ const sp<DataSource> &source, String8 *mimeType, float *confidence,
+ sp<AMessage> *);
+
+} // namespace android
+
+#endif // AAC_EXTRACTOR_H_
diff --git a/media/extractors/aac/Android.bp b/media/extractors/aac/Android.bp
new file mode 100644
index 0000000..b4ef53e
--- /dev/null
+++ b/media/extractors/aac/Android.bp
@@ -0,0 +1,39 @@
+cc_library_shared {
+
+ srcs: ["AACExtractor.cpp"],
+
+ include_dirs: [
+ "frameworks/av/media/libstagefright/",
+ ],
+
+ shared_libs: [
+ "libstagefright",
+ "libmedia",
+ "libstagefright_foundation",
+ "libutils",
+ "liblog",
+ ],
+
+ name: "libaacextractor",
+ relative_install_path: "extractors",
+
+ compile_multilib: "first",
+
+ cflags: [
+ "-Werror",
+ "-Wall",
+ "-fvisibility=hidden",
+ ],
+
+ sanitize: {
+ cfi: true,
+ misc_undefined: [
+ "unsigned-integer-overflow",
+ "signed-integer-overflow",
+ ],
+ diag: {
+ cfi: true,
+ },
+ },
+
+}
diff --git a/media/extractors/aac/MODULE_LICENSE_APACHE2 b/media/extractors/aac/MODULE_LICENSE_APACHE2
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/media/extractors/aac/MODULE_LICENSE_APACHE2
diff --git a/media/extractors/aac/NOTICE b/media/extractors/aac/NOTICE
new file mode 100644
index 0000000..c5b1efa
--- /dev/null
+++ b/media/extractors/aac/NOTICE
@@ -0,0 +1,190 @@
+
+ Copyright (c) 2005-2008, The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
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+
+
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
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+
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+ "Derivative Works" shall mean any work, whether in Source or Object
+ form, that is based on (or derived from) the Work and for which the
+ editorial revisions, annotations, elaborations, or other modifications
+ represent, as a whole, an original work of authorship. For the purposes
+ of this License, Derivative Works shall not include works that remain
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+ "Contribution" shall mean any work of authorship, including
+ the original version of the Work and any modifications or additions
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+ institute patent litigation against any entity (including a
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+ or contributory patent infringement, then any patent licenses
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+ 4. Redistribution. You may reproduce and distribute copies of the
+ Work or Derivative Works thereof in any medium, with or without
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+ meet the following conditions:
+
+ (a) You must give any other recipients of the Work or
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+
+ (b) You must cause any modified files to carry prominent notices
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