Add basic metadata retrieval support for midi, ogg, etc.

Bug 2050320

include/media/MediaMetadataRetrieverInterface.h

@@ -44,6 +44,28 @@ class MediaMetadataRetrieverInterface : public MediaMetadataRetrieverBase
 {
 public:
     virtual             ~MediaMetadataRetrieverInterface() {}
+
+    // @param mode The intended mode of operations:
+    // can be any of the following:
+    // METADATA_MODE_NOOP: Experimental - just add and remove data source.
+    // METADATA_MODE_FRAME_CAPTURE_ONLY: For capture frame/thumbnail only.
+    // METADATA_MODE_METADATA_RETRIEVAL_ONLY: For meta data retrieval only.
+    // METADATA_MODE_FRAME_CAPTURE_AND_METADATA_RETRIEVAL: For both frame
+    //     capture and meta data retrieval.
+    virtual status_t    setMode(int mode) {
+                            if (mode < METADATA_MODE_NOOP ||
+                                mode > METADATA_MODE_FRAME_CAPTURE_AND_METADATA_RETRIEVAL) {
+                                return BAD_VALUE;
+                            }
+                            return NO_ERROR;
+                        }
+
+    virtual status_t    getMode(int* mode) const { *mode = mMode; return NO_ERROR; }
+    virtual VideoFrame* captureFrame() { return NULL; }
+    virtual MediaAlbumArt* extractAlbumArt() { return NULL; }
+    virtual const char* extractMetadata(int keyCode) { return NULL; }
+
+    uint32_t mMode;
 };
 
 }; // namespace android

include/media/mediametadataretriever.h

@@ -56,6 +56,18 @@ enum {
     // Add more here...
 };
 
+// The intended mode of operations:$
+// METADATA_MODE_NOOP: Experimental - just add and remove data source.$
+// METADATA_MODE_FRAME_CAPTURE_ONLY: For capture frame/thumbnail only.$
+// METADATA_MODE_METADATA_RETRIEVAL_ONLY: For meta data retrieval only.$
+// METADATA_MODE_FRAME_CAPTURE_AND_METADATA_RETRIEVAL: For both frame capture
+//   and meta data retrieval.$
+enum {
+    METADATA_MODE_NOOP                                 = 0x00,
+    METADATA_MODE_FRAME_CAPTURE_ONLY                   = 0x01,
+    METADATA_MODE_METADATA_RETRIEVAL_ONLY              = 0x02,
+    METADATA_MODE_FRAME_CAPTURE_AND_METADATA_RETRIEVAL = 0x03
+};
 
 class MediaMetadataRetriever: public RefBase
 {

media/libmediaplayerservice/Android.mk

@@ -13,6 +13,8 @@ LOCAL_SRC_FILES:=               \
     StagefrightPlayer.cpp       \
     TestPlayerStub.cpp          \
     VorbisPlayer.cpp            \
+    VorbisMetadataRetriever.cpp \
+    MidiMetadataRetriever.cpp \
     MidiFile.cpp
 
 ifeq ($(TARGET_OS)-$(TARGET_SIMULATOR),linux-true)

media/libmediaplayerservice/MediaPlayerService.cpp

@@ -611,7 +611,7 @@ static player_type getDefaultPlayerType() {
     return PV_PLAYER;
 }
 
-static player_type getPlayerType(int fd, int64_t offset, int64_t length)
+player_type getPlayerType(int fd, int64_t offset, int64_t length)
 {
     char buf[20];
     lseek(fd, offset, SEEK_SET);
@@ -644,7 +644,7 @@ static player_type getPlayerType(int fd, int64_t offset, int64_t length)
     return getDefaultPlayerType();
 }
 
-static player_type getPlayerType(const char* url)
+player_type getPlayerType(const char* url)
 {
     if (TestPlayerStub::canBeUsed(url)) {
         return TEST_PLAYER;

media/libmediaplayerservice/MetadataRetrieverClient.cpp

@@ -34,12 +34,15 @@
 #include <media/MediaPlayerInterface.h>
 #include <media/PVMetadataRetriever.h>
 #include <private/media/VideoFrame.h>
-
+#include "VorbisMetadataRetriever.h"
+#include "MidiMetadataRetriever.h"
 #include "MetadataRetrieverClient.h"
 
-
 namespace android {
 
+extern player_type getPlayerType(const char* url);
+extern player_type getPlayerType(int fd, int64_t offset, int64_t length);
+
 MetadataRetrieverClient::MetadataRetrieverClient(pid_t pid)
 {
     LOGV("MetadataRetrieverClient constructor pid(%d)", pid);
@@ -90,18 +93,50 @@ void MetadataRetrieverClient::disconnect()
     IPCThreadState::self()->flushCommands();
 }
 
+static sp<MediaMetadataRetrieverBase> createRetriever(player_type playerType)
+{
+    sp<MediaMetadataRetrieverBase> p;
+    switch (playerType) {
+#ifndef NO_OPENCORE
+        case PV_PLAYER:
+            LOGV("create pv metadata retriever");
+            p = new PVMetadataRetriever();
+            break;
+#endif
+        case VORBIS_PLAYER:
+            LOGV("create vorbis metadata retriever");
+            p = new VorbisMetadataRetriever();
+            break;
+        case SONIVOX_PLAYER:
+            LOGV("create midi metadata retriever");
+            p = new MidiMetadataRetriever();
+            break;
+        default:
+            // TODO:
+            // support for STAGEFRIGHT_PLAYER and TEST_PLAYER
+            LOGE("player type %d is not supported",  playerType);
+            break;
+    }
+    if (p == NULL) {
+        LOGE("failed to create a retriever object");
+    }
+    return p;
+}
+
 status_t MetadataRetrieverClient::setDataSource(const char *url)
 {
     LOGV("setDataSource(%s)", url);
     Mutex::Autolock lock(mLock);
     if (url == NULL) {
         return UNKNOWN_ERROR;
     }
-    if (mRetriever == NULL) {
-        LOGE("retriever is not initialized");
-        return NO_INIT;
-    }
-    return mRetriever->setDataSource(url);
+    player_type playerType = getPlayerType(url);
+    LOGV("player type = %d", playerType);
+    sp<MediaMetadataRetrieverBase> p = createRetriever(playerType);
+    if (p == NULL) return NO_INIT;
+    status_t ret = p->setDataSource(url);
+    if (ret == NO_ERROR) mRetriever = p;
+    return ret;
 }
 
 status_t MetadataRetrieverClient::setDataSource(int fd, int64_t offset, int64_t length)
@@ -118,7 +153,7 @@ status_t MetadataRetrieverClient::setDataSource(int fd, int64_t offset, int64_t
     int ret = fstat(fd, &sb);
     if (ret != 0) {
         LOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
-        return UNKNOWN_ERROR;
+        return BAD_VALUE;
     }
     LOGV("st_dev  = %llu", sb.st_dev);
     LOGV("st_mode = %u", sb.st_mode);
@@ -129,13 +164,22 @@ status_t MetadataRetrieverClient::setDataSource(int fd, int64_t offset, int64_t
     if (offset >= sb.st_size) {
         LOGE("offset (%lld) bigger than file size (%llu)", offset, sb.st_size);
         ::close(fd);
-        return UNKNOWN_ERROR;
+        return BAD_VALUE;
     }
     if (offset + length > sb.st_size) {
         length = sb.st_size - offset;
-        LOGE("calculated length = %lld", length);
+        LOGV("calculated length = %lld", length);
+    }
+
+    player_type playerType = getPlayerType(fd, offset, length);
+    LOGV("player type = %d", playerType);
+    sp<MediaMetadataRetrieverBase> p = createRetriever(playerType);
+    if (p == NULL) {
+        ::close(fd);
+        return NO_INIT;
     }
-    status_t status = mRetriever->setDataSource(fd, offset, length);
+    status_t status = p->setDataSource(fd, offset, length);
+    if (status == NO_ERROR) mRetriever = p;
     ::close(fd);
     return status;
 }

media/libmediaplayerservice/MidiMetadataRetriever.cpp

@@ -0,0 +1,91 @@
+/*
+**
+** Copyright 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 "MidiMetadataRetriever"
+#include <utils/Log.h>
+
+#include "MidiMetadataRetriever.h"
+#include <media/mediametadataretriever.h>
+
+namespace android {
+
+static status_t ERROR_NOT_OPEN = -1;
+static status_t ERROR_OPEN_FAILED = -2;
+static status_t ERROR_EAS_FAILURE = -3;
+static status_t ERROR_ALLOCATE_FAILED = -4;
+
+void MidiMetadataRetriever::clearMetadataValues()
+{
+    LOGV("clearMetadataValues");
+    mMetadataValues[0][0] = '\0';
+}
+
+status_t MidiMetadataRetriever::setDataSource(const char *url)
+{
+    LOGV("setDataSource: %s", url? url: "NULL pointer");
+    Mutex::Autolock lock(mLock);
+    clearMetadataValues();
+    if (mMidiPlayer == 0) {
+        mMidiPlayer = new MidiFile();
+    }
+    return mMidiPlayer->setDataSource(url);
+}
+
+status_t MidiMetadataRetriever::setDataSource(int fd, int64_t offset, int64_t length)
+{
+    LOGV("setDataSource: fd(%d), offset(%lld), and length(%lld)", fd, offset, length);
+    Mutex::Autolock lock(mLock);
+    clearMetadataValues();
+    if (mMidiPlayer == 0) {
+        mMidiPlayer = new MidiFile();
+    }
+    return mMidiPlayer->setDataSource(fd, offset, length);;
+}
+
+const char* MidiMetadataRetriever::extractMetadata(int keyCode)
+{
+    LOGV("extractMetdata: key(%d)", keyCode);
+    Mutex::Autolock lock(mLock);
+    if (mMidiPlayer == 0 || mMidiPlayer->initCheck() != NO_ERROR) {
+        LOGE("Midi player is not initialized yet");
+        return NULL;
+    }
+    switch (keyCode) {
+    case METADATA_KEY_DURATION:
+        {
+            if (mMetadataValues[0][0] == '\0') {
+                int duration = -1;
+                if (mMidiPlayer->getDuration(&duration) != NO_ERROR) {
+                    LOGE("failed to get duration");
+                    return NULL;
+                }
+                snprintf(mMetadataValues[0], MAX_METADATA_STRING_LENGTH, "%d", duration);
+            }
+
+            LOGV("duration: %s ms", mMetadataValues[0]);
+            return mMetadataValues[0];
+        }
+    default:
+        LOGE("Unsupported key code (%d)", keyCode);
+        return NULL;
+    }
+    return NULL;
+}
+
+};
+

media/libmediaplayerservice/MidiMetadataRetriever.h

@@ -0,0 +1,49 @@
+/*
+**
+** Copyright 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 ANDROID_MIDIMETADATARETRIEVER_H
+#define ANDROID_MIDIMETADATARETRIEVER_H
+
+#include <utils/threads.h>
+#include <utils/Errors.h>
+#include <media/MediaMetadataRetrieverInterface.h>
+
+#include "MidiFile.h"
+
+namespace android {
+
+class MidiMetadataRetriever : public MediaMetadataRetrieverInterface {
+public:
+                                   MidiMetadataRetriever() {}
+                                   ~MidiMetadataRetriever() {}
+
+    virtual status_t                setDataSource(const char *url);
+    virtual status_t                setDataSource(int fd, int64_t offset, int64_t length);
+    virtual const char*             extractMetadata(int keyCode);
+
+private:
+    static const uint32_t MAX_METADATA_STRING_LENGTH = 128;
+    void clearMetadataValues();
+
+    Mutex               mLock;
+    sp<MidiFile>        mMidiPlayer;
+    char                mMetadataValues[1][MAX_METADATA_STRING_LENGTH];
+};
+
+}; // namespace android
+
+#endif // ANDROID_MIDIMETADATARETRIEVER_H