Make extractors separate libraries
instead of being integrated into libstagefright
Test: thoroughly
Change-Id: I11cdfde6d2daf248c8e0f99237db1c74be260eb0
diff --git a/media/extractors/amr/AMRExtractor.cpp b/media/extractors/amr/AMRExtractor.cpp
new file mode 100644
index 0000000..d8b92bd
--- /dev/null
+++ b/media/extractors/amr/AMRExtractor.cpp
@@ -0,0 +1,392 @@
+/*
+ * Copyright (C) 2009 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 "AMRExtractor"
+#include <utils/Log.h>
+
+#include "AMRExtractor.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 AMRSource : public MediaSource {
+public:
+ AMRSource(const sp<DataSource> &source,
+ const sp<MetaData> &meta,
+ bool isWide,
+ const off64_t *offset_table,
+ size_t offset_table_length);
+
+ 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 ~AMRSource();
+
+private:
+ sp<DataSource> mDataSource;
+ sp<MetaData> mMeta;
+ bool mIsWide;
+
+ off64_t mOffset;
+ int64_t mCurrentTimeUs;
+ bool mStarted;
+ MediaBufferGroup *mGroup;
+
+ off64_t mOffsetTable[OFFSET_TABLE_LEN];
+ size_t mOffsetTableLength;
+
+ AMRSource(const AMRSource &);
+ AMRSource &operator=(const AMRSource &);
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
+static size_t getFrameSize(bool isWide, unsigned FT) {
+ static const size_t kFrameSizeNB[16] = {
+ 95, 103, 118, 134, 148, 159, 204, 244,
+ 39, 43, 38, 37, // SID
+ 0, 0, 0, // future use
+ 0 // no data
+ };
+ static const size_t kFrameSizeWB[16] = {
+ 132, 177, 253, 285, 317, 365, 397, 461, 477,
+ 40, // SID
+ 0, 0, 0, 0, // future use
+ 0, // speech lost
+ 0 // no data
+ };
+
+ if (FT > 15 || (isWide && FT > 9 && FT < 14) || (!isWide && FT > 11 && FT < 15)) {
+ ALOGE("illegal AMR frame type %d", FT);
+ return 0;
+ }
+
+ size_t frameSize = isWide ? kFrameSizeWB[FT] : kFrameSizeNB[FT];
+
+ // Round up bits to bytes and add 1 for the header byte.
+ frameSize = (frameSize + 7) / 8 + 1;
+
+ return frameSize;
+}
+
+static status_t getFrameSizeByOffset(const sp<DataSource> &source,
+ off64_t offset, bool isWide, size_t *frameSize) {
+ uint8_t header;
+ ssize_t count = source->readAt(offset, &header, 1);
+ if (count == 0) {
+ return ERROR_END_OF_STREAM;
+ } else if (count < 0) {
+ return ERROR_IO;
+ }
+
+ unsigned FT = (header >> 3) & 0x0f;
+
+ *frameSize = getFrameSize(isWide, FT);
+ if (*frameSize == 0) {
+ return ERROR_MALFORMED;
+ }
+ return OK;
+}
+
+AMRExtractor::AMRExtractor(const sp<DataSource> &source)
+ : mDataSource(source),
+ mInitCheck(NO_INIT),
+ mOffsetTableLength(0) {
+ String8 mimeType;
+ float confidence;
+ if (!SniffAMR(mDataSource, &mimeType, &confidence, NULL)) {
+ return;
+ }
+
+ mIsWide = (mimeType == MEDIA_MIMETYPE_AUDIO_AMR_WB);
+
+ mMeta = new MetaData;
+ mMeta->setCString(
+ kKeyMIMEType, mIsWide ? MEDIA_MIMETYPE_AUDIO_AMR_WB
+ : MEDIA_MIMETYPE_AUDIO_AMR_NB);
+
+ mMeta->setInt32(kKeyChannelCount, 1);
+ mMeta->setInt32(kKeySampleRate, mIsWide ? 16000 : 8000);
+
+ off64_t offset = mIsWide ? 9 : 6;
+ off64_t streamSize;
+ size_t frameSize, numFrames = 0;
+ int64_t duration = 0;
+
+ if (mDataSource->getSize(&streamSize) == OK) {
+ while (offset < streamSize) {
+ status_t status = getFrameSizeByOffset(source, offset, mIsWide, &frameSize);
+ if (status == ERROR_END_OF_STREAM) {
+ break;
+ } else if (status != OK) {
+ return;
+ }
+
+ if ((numFrames % 50 == 0) && (numFrames / 50 < OFFSET_TABLE_LEN)) {
+ CHECK_EQ(mOffsetTableLength, numFrames / 50);
+ mOffsetTable[mOffsetTableLength] = offset - (mIsWide ? 9: 6);
+ mOffsetTableLength ++;
+ }
+
+ offset += frameSize;
+ duration += 20000; // Each frame is 20ms
+ numFrames ++;
+ }
+
+ mMeta->setInt64(kKeyDuration, duration);
+ }
+
+ mInitCheck = OK;
+}
+
+AMRExtractor::~AMRExtractor() {
+}
+
+sp<MetaData> AMRExtractor::getMetaData() {
+ sp<MetaData> meta = new MetaData;
+
+ if (mInitCheck != OK) {
+ return meta;
+ }
+
+ meta->setCString(kKeyMIMEType, mIsWide ? "audio/amr-wb" : "audio/amr");
+
+ return meta;
+}
+
+size_t AMRExtractor::countTracks() {
+ return mInitCheck == OK ? 1 : 0;
+}
+
+sp<MediaSource> AMRExtractor::getTrack(size_t index) {
+ if (mInitCheck != OK || index != 0) {
+ return NULL;
+ }
+
+ return new AMRSource(mDataSource, mMeta, mIsWide,
+ mOffsetTable, mOffsetTableLength);
+}
+
+sp<MetaData> AMRExtractor::getTrackMetaData(size_t index, uint32_t /* flags */) {
+ if (mInitCheck != OK || index != 0) {
+ return NULL;
+ }
+
+ return mMeta;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+AMRSource::AMRSource(
+ const sp<DataSource> &source, const sp<MetaData> &meta,
+ bool isWide, const off64_t *offset_table, size_t offset_table_length)
+ : mDataSource(source),
+ mMeta(meta),
+ mIsWide(isWide),
+ mOffset(mIsWide ? 9 : 6),
+ mCurrentTimeUs(0),
+ mStarted(false),
+ mGroup(NULL),
+ mOffsetTableLength(offset_table_length) {
+ if (mOffsetTableLength > 0 && mOffsetTableLength <= OFFSET_TABLE_LEN) {
+ memcpy ((char*)mOffsetTable, (char*)offset_table, sizeof(off64_t) * mOffsetTableLength);
+ }
+}
+
+AMRSource::~AMRSource() {
+ if (mStarted) {
+ stop();
+ }
+}
+
+status_t AMRSource::start(MetaData * /* params */) {
+ CHECK(!mStarted);
+
+ mOffset = mIsWide ? 9 : 6;
+ mCurrentTimeUs = 0;
+ mGroup = new MediaBufferGroup;
+ mGroup->add_buffer(new MediaBuffer(128));
+ mStarted = true;
+
+ return OK;
+}
+
+status_t AMRSource::stop() {
+ CHECK(mStarted);
+
+ delete mGroup;
+ mGroup = NULL;
+
+ mStarted = false;
+ return OK;
+}
+
+sp<MetaData> AMRSource::getFormat() {
+ return mMeta;
+}
+
+status_t AMRSource::read(
+ MediaBuffer **out, const ReadOptions *options) {
+ *out = NULL;
+
+ int64_t seekTimeUs;
+ ReadOptions::SeekMode mode;
+ if (mOffsetTableLength > 0 && options && options->getSeekTo(&seekTimeUs, &mode)) {
+ size_t size;
+ int64_t seekFrame = seekTimeUs / 20000ll; // 20ms per frame.
+ mCurrentTimeUs = seekFrame * 20000ll;
+
+ size_t index = seekFrame < 0 ? 0 : seekFrame / 50;
+ if (index >= mOffsetTableLength) {
+ index = mOffsetTableLength - 1;
+ }
+
+ mOffset = mOffsetTable[index] + (mIsWide ? 9 : 6);
+
+ for (size_t i = 0; i< seekFrame - index * 50; i++) {
+ status_t err;
+ if ((err = getFrameSizeByOffset(mDataSource, mOffset,
+ mIsWide, &size)) != OK) {
+ return err;
+ }
+ mOffset += size;
+ }
+ }
+
+ uint8_t header;
+ ssize_t n = mDataSource->readAt(mOffset, &header, 1);
+
+ if (n < 1) {
+ return ERROR_END_OF_STREAM;
+ }
+
+ if (header & 0x83) {
+ // Padding bits must be 0.
+
+ ALOGE("padding bits must be 0, header is 0x%02x", header);
+
+ return ERROR_MALFORMED;
+ }
+
+ unsigned FT = (header >> 3) & 0x0f;
+
+ size_t frameSize = getFrameSize(mIsWide, FT);
+ if (frameSize == 0) {
+ return ERROR_MALFORMED;
+ }
+
+ MediaBuffer *buffer;
+ status_t err = mGroup->acquire_buffer(&buffer);
+ if (err != OK) {
+ return err;
+ }
+
+ n = mDataSource->readAt(mOffset, buffer->data(), frameSize);
+
+ if (n != (ssize_t)frameSize) {
+ buffer->release();
+ buffer = NULL;
+
+ if (n < 0) {
+ return ERROR_IO;
+ } else {
+ // only partial frame is available, treat it as EOS.
+ mOffset += n;
+ return ERROR_END_OF_STREAM;
+ }
+ }
+
+ buffer->set_range(0, frameSize);
+ buffer->meta_data()->setInt64(kKeyTime, mCurrentTimeUs);
+ buffer->meta_data()->setInt32(kKeyIsSyncFrame, 1);
+
+ mOffset += frameSize;
+ mCurrentTimeUs += 20000; // Each frame is 20ms
+
+ *out = buffer;
+
+ return OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+bool SniffAMR(
+ const sp<DataSource> &source, String8 *mimeType, float *confidence,
+ sp<AMessage> *) {
+ char header[9];
+
+ if (source->readAt(0, header, sizeof(header)) != sizeof(header)) {
+ return false;
+ }
+
+ if (!memcmp(header, "#!AMR\n", 6)) {
+ *mimeType = MEDIA_MIMETYPE_AUDIO_AMR_NB;
+ *confidence = 0.5;
+
+ return true;
+ } else if (!memcmp(header, "#!AMR-WB\n", 9)) {
+ *mimeType = MEDIA_MIMETYPE_AUDIO_AMR_WB;
+ *confidence = 0.5;
+
+ return true;
+ }
+
+ return false;
+}
+
+extern "C" {
+// This is the only symbol that needs to be exported
+__attribute__ ((visibility ("default")))
+MediaExtractor::ExtractorDef GETEXTRACTORDEF() {
+ return {
+ MediaExtractor::EXTRACTORDEF_VERSION,
+ UUID("c86639c9-2f31-40ac-a715-fa01b4493aaf"),
+ 1,
+ "AMR Extractor",
+ [](
+ const sp<DataSource> &source,
+ String8 *mimeType,
+ float *confidence,
+ sp<AMessage> *meta __unused) -> MediaExtractor::CreatorFunc {
+ if (SniffAMR(source, mimeType, confidence, meta)) {
+ return [](
+ const sp<DataSource> &source,
+ const sp<AMessage>& meta __unused) -> MediaExtractor* {
+ return new AMRExtractor(source);};
+ }
+ return NULL;
+ }
+ };
+}
+
+} // extern "C"
+
+} // namespace android
diff --git a/media/extractors/amr/AMRExtractor.h b/media/extractors/amr/AMRExtractor.h
new file mode 100644
index 0000000..06cd387
--- /dev/null
+++ b/media/extractors/amr/AMRExtractor.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2009 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 AMR_EXTRACTOR_H_
+
+#define AMR_EXTRACTOR_H_
+
+#include <utils/Errors.h>
+#include <media/stagefright/MediaExtractor.h>
+
+namespace android {
+
+struct AMessage;
+class String8;
+#define OFFSET_TABLE_LEN 300
+
+class AMRExtractor : public MediaExtractor {
+public:
+ explicit AMRExtractor(const sp<DataSource> &source);
+
+ 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 "AMRExtractor"; }
+
+protected:
+ virtual ~AMRExtractor();
+
+private:
+ sp<DataSource> mDataSource;
+ sp<MetaData> mMeta;
+ status_t mInitCheck;
+ bool mIsWide;
+
+ off64_t mOffsetTable[OFFSET_TABLE_LEN]; //5 min
+ size_t mOffsetTableLength;
+
+ AMRExtractor(const AMRExtractor &);
+ AMRExtractor &operator=(const AMRExtractor &);
+};
+
+bool SniffAMR(
+ const sp<DataSource> &source, String8 *mimeType, float *confidence,
+ sp<AMessage> *);
+
+} // namespace android
+
+#endif // AMR_EXTRACTOR_H_
diff --git a/media/extractors/amr/Android.bp b/media/extractors/amr/Android.bp
new file mode 100644
index 0000000..85e4777
--- /dev/null
+++ b/media/extractors/amr/Android.bp
@@ -0,0 +1,39 @@
+cc_library_shared {
+
+ srcs: ["AMRExtractor.cpp"],
+
+ include_dirs: [
+ "frameworks/av/media/libstagefright/include",
+ ],
+
+ shared_libs: [
+ "libstagefright",
+ "libmedia",
+ "libstagefright_foundation",
+ "libutils",
+ "liblog",
+ ],
+
+ name: "libamrextractor",
+ 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/amr/MODULE_LICENSE_APACHE2 b/media/extractors/amr/MODULE_LICENSE_APACHE2
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/media/extractors/amr/MODULE_LICENSE_APACHE2
diff --git a/media/extractors/amr/NOTICE b/media/extractors/amr/NOTICE
new file mode 100644
index 0000000..c5b1efa
--- /dev/null
+++ b/media/extractors/amr/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
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+ 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
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+ represent, as a whole, an original work of authorship. For the purposes
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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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+ 4. Redistribution. You may reproduce and distribute copies of the
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