Instead of hardcoding OMX component names in our code, support

a config file instead.

Change-Id: I5835903ab9f1c4a22ccc605ca99ed966767adf57

1 files changed, 475 insertions, 0 deletions

diff --git a/media/libstagefright/MediaCodecList.cpp b/media/libstagefright/MediaCodecList.cpp
new file mode 100644
index 0000000..6b64e21
--- /dev/null
+++ b/media/libstagefright/MediaCodecList.cpp
@@ -0,0 +1,475 @@
+/*
+ * Copyright 2012, 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 "MediaCodecList"
+#include <utils/Log.h>
+
+#include <media/stagefright/MediaCodecList.h>
+
+#include <media/stagefright/foundation/ADebug.h>
+#include <media/stagefright/MediaErrors.h>
+#include <utils/threads.h>
+
+#include <expat.h>
+
+namespace android {
+
+static Mutex sInitMutex;
+
+// static
+MediaCodecList *MediaCodecList::sCodecList;
+
+// static
+const MediaCodecList *MediaCodecList::getInstance() {
+    Mutex::Autolock autoLock(sInitMutex);
+
+    if (sCodecList == NULL) {
+        sCodecList = new MediaCodecList;
+    }
+
+    return sCodecList->initCheck() == OK ? sCodecList : NULL;
+}
+
+MediaCodecList::MediaCodecList()
+    : mInitCheck(NO_INIT) {
+    FILE *file = fopen("/etc/media_codecs.xml", "r");
+
+    if (file == NULL) {
+        ALOGW("unable to open media codecs configuration xml file.");
+        return;
+    }
+
+    parseXMLFile(file);
+
+    if (mInitCheck == OK) {
+        // These are currently still used by the video editing suite.
+
+        addMediaCodec(true /* encoder */, "AACEncoder", "audio/mp4a-latm");
+        addMediaCodec(true /* encoder */, "AVCEncoder", "video/avc");
+
+        addMediaCodec(true /* encoder */, "M4vH263Encoder");
+        addType("video/3gpp");
+        addType("video/mp4v-es");
+    }
+
+#if 0
+    for (size_t i = 0; i < mCodecInfos.size(); ++i) {
+        const CodecInfo &info = mCodecInfos.itemAt(i);
+
+        AString line = info.mName;
+        line.append(" supports ");
+        for (size_t j = 0; j < mTypes.size(); ++j) {
+            uint32_t value = mTypes.valueAt(j);
+
+            if (info.mTypes & (1ul << value)) {
+                line.append(mTypes.keyAt(j));
+                line.append(" ");
+            }
+        }
+
+        ALOGI("%s", line.c_str());
+    }
+#endif
+
+    fclose(file);
+    file = NULL;
+}
+
+MediaCodecList::~MediaCodecList() {
+}
+
+status_t MediaCodecList::initCheck() const {
+    return mInitCheck;
+}
+
+void MediaCodecList::parseXMLFile(FILE *file) {
+    mInitCheck = OK;
+    mCurrentSection = SECTION_TOPLEVEL;
+    mDepth = 0;
+
+    XML_Parser parser = ::XML_ParserCreate(NULL);
+    CHECK(parser != NULL);
+
+    ::XML_SetUserData(parser, this);
+    ::XML_SetElementHandler(
+            parser, StartElementHandlerWrapper, EndElementHandlerWrapper);
+
+    const int BUFF_SIZE = 512;
+    while (mInitCheck == OK) {
+        void *buff = ::XML_GetBuffer(parser, BUFF_SIZE);
+        if (buff == NULL) {
+            ALOGE("failed to in call to XML_GetBuffer()");
+            mInitCheck = UNKNOWN_ERROR;
+            break;
+        }
+
+        int bytes_read = ::fread(buff, 1, BUFF_SIZE, file);
+        if (bytes_read < 0) {
+            ALOGE("failed in call to read");
+            mInitCheck = ERROR_IO;
+            break;
+        }
+
+        if (::XML_ParseBuffer(parser, bytes_read, bytes_read == 0)
+                != XML_STATUS_OK) {
+            mInitCheck = ERROR_MALFORMED;
+            break;
+        }
+
+        if (bytes_read == 0) {
+            break;
+        }
+    }
+
+    ::XML_ParserFree(parser);
+
+    if (mInitCheck == OK) {
+        for (size_t i = mCodecInfos.size(); i-- > 0;) {
+            CodecInfo *info = &mCodecInfos.editItemAt(i);
+
+            if (info->mTypes == 0) {
+                // No types supported by this component???
+
+                ALOGW("Component %s does not support any type of media?",
+                      info->mName.c_str());
+
+                mCodecInfos.removeAt(i);
+            }
+        }
+    }
+
+    if (mInitCheck != OK) {
+        mCodecInfos.clear();
+        mCodecQuirks.clear();
+    }
+}
+
+// static
+void MediaCodecList::StartElementHandlerWrapper(
+        void *me, const char *name, const char **attrs) {
+    static_cast<MediaCodecList *>(me)->startElementHandler(name, attrs);
+}
+
+// static
+void MediaCodecList::EndElementHandlerWrapper(void *me, const char *name) {
+    static_cast<MediaCodecList *>(me)->endElementHandler(name);
+}
+
+void MediaCodecList::startElementHandler(
+        const char *name, const char **attrs) {
+    if (mInitCheck != OK) {
+        return;
+    }
+
+    switch (mCurrentSection) {
+        case SECTION_TOPLEVEL:
+        {
+            if (!strcmp(name, "Decoders")) {
+                mCurrentSection = SECTION_DECODERS;
+            } else if (!strcmp(name, "Encoders")) {
+                mCurrentSection = SECTION_ENCODERS;
+            }
+            break;
+        }
+
+        case SECTION_DECODERS:
+        {
+            if (!strcmp(name, "MediaCodec")) {
+                mInitCheck =
+                    addMediaCodecFromAttributes(false /* encoder */, attrs);
+
+                mCurrentSection = SECTION_DECODER;
+            }
+            break;
+        }
+
+        case SECTION_ENCODERS:
+        {
+            if (!strcmp(name, "MediaCodec")) {
+                mInitCheck =
+                    addMediaCodecFromAttributes(true /* encoder */, attrs);
+
+                mCurrentSection = SECTION_ENCODER;
+            }
+            break;
+        }
+
+        case SECTION_DECODER:
+        case SECTION_ENCODER:
+        {
+            if (!strcmp(name, "Quirk")) {
+                mInitCheck = addQuirk(attrs);
+            } else if (!strcmp(name, "Type")) {
+                mInitCheck = addTypeFromAttributes(attrs);
+            }
+            break;
+        }
+
+        default:
+            break;
+    }
+
+    ++mDepth;
+}
+
+void MediaCodecList::endElementHandler(const char *name) {
+    if (mInitCheck != OK) {
+        return;
+    }
+
+    switch (mCurrentSection) {
+        case SECTION_DECODERS:
+        {
+            if (!strcmp(name, "Decoders")) {
+                mCurrentSection = SECTION_TOPLEVEL;
+            }
+            break;
+        }
+
+        case SECTION_ENCODERS:
+        {
+            if (!strcmp(name, "Encoders")) {
+                mCurrentSection = SECTION_TOPLEVEL;
+            }
+            break;
+        }
+
+        case SECTION_DECODER:
+        {
+            if (!strcmp(name, "MediaCodec")) {
+                mCurrentSection = SECTION_DECODERS;
+            }
+            break;
+        }
+
+        case SECTION_ENCODER:
+        {
+            if (!strcmp(name, "MediaCodec")) {
+                mCurrentSection = SECTION_ENCODERS;
+            }
+            break;
+        }
+
+        default:
+            break;
+    }
+
+    --mDepth;
+}
+
+status_t MediaCodecList::addMediaCodecFromAttributes(
+        bool encoder, const char **attrs) {
+    const char *name = NULL;
+    const char *type = NULL;
+
+    size_t i = 0;
+    while (attrs[i] != NULL) {
+        if (!strcmp(attrs[i], "name")) {
+            if (attrs[i + 1] == NULL) {
+                return -EINVAL;
+            }
+            name = attrs[i + 1];
+            ++i;
+        } else if (!strcmp(attrs[i], "type")) {
+            if (attrs[i + 1] == NULL) {
+                return -EINVAL;
+            }
+            type = attrs[i + 1];
+            ++i;
+        } else {
+            return -EINVAL;
+        }
+
+        ++i;
+    }
+
+    if (name == NULL) {
+        return -EINVAL;
+    }
+
+    addMediaCodec(encoder, name, type);
+
+    return OK;
+}
+
+void MediaCodecList::addMediaCodec(
+        bool encoder, const char *name, const char *type) {
+    mCodecInfos.push();
+    CodecInfo *info = &mCodecInfos.editItemAt(mCodecInfos.size() - 1);
+    info->mName = name;
+    info->mIsEncoder = encoder;
+    info->mTypes = 0;
+    info->mQuirks = 0;
+
+    if (type != NULL) {
+        addType(type);
+    }
+}
+
+status_t MediaCodecList::addQuirk(const char **attrs) {
+    const char *name = NULL;
+
+    size_t i = 0;
+    while (attrs[i] != NULL) {
+        if (!strcmp(attrs[i], "name")) {
+            if (attrs[i + 1] == NULL) {
+                return -EINVAL;
+            }
+            name = attrs[i + 1];
+            ++i;
+        } else {
+            return -EINVAL;
+        }
+
+        ++i;
+    }
+
+    if (name == NULL) {
+        return -EINVAL;
+    }
+
+    uint32_t bit;
+    ssize_t index = mCodecQuirks.indexOfKey(name);
+    if (index < 0) {
+        bit = mCodecQuirks.size();
+
+        if (bit == 32) {
+            ALOGW("Too many distinct quirk names in configuration.");
+            return OK;
+        }
+
+        mCodecQuirks.add(name, bit);
+    } else {
+        bit = mCodecQuirks.valueAt(index);
+    }
+
+    CodecInfo *info = &mCodecInfos.editItemAt(mCodecInfos.size() - 1);
+    info->mQuirks |= 1ul << bit;
+
+    return OK;
+}
+
+status_t MediaCodecList::addTypeFromAttributes(const char **attrs) {
+    const char *name = NULL;
+
+    size_t i = 0;
+    while (attrs[i] != NULL) {
+        if (!strcmp(attrs[i], "name")) {
+            if (attrs[i + 1] == NULL) {
+                return -EINVAL;
+            }
+            name = attrs[i + 1];
+            ++i;
+        } else {
+            return -EINVAL;
+        }
+
+        ++i;
+    }
+
+    if (name == NULL) {
+        return -EINVAL;
+    }
+
+    addType(name);
+
+    return OK;
+}
+
+void MediaCodecList::addType(const char *name) {
+    uint32_t bit;
+    ssize_t index = mTypes.indexOfKey(name);
+    if (index < 0) {
+        bit = mTypes.size();
+
+        if (bit == 32) {
+            ALOGW("Too many distinct type names in configuration.");
+            return;
+        }
+
+        mTypes.add(name, bit);
+    } else {
+        bit = mTypes.valueAt(index);
+    }
+
+    CodecInfo *info = &mCodecInfos.editItemAt(mCodecInfos.size() - 1);
+    info->mTypes |= 1ul << bit;
+}
+
+ssize_t MediaCodecList::findCodecByType(
+        const char *type, bool encoder, size_t startIndex) const {
+    ssize_t typeIndex = mTypes.indexOfKey(type);
+
+    if (typeIndex < 0) {
+        return -ENOENT;
+    }
+
+    uint32_t typeMask = 1ul << mTypes.valueAt(typeIndex);
+
+    while (startIndex < mCodecInfos.size()) {
+        const CodecInfo &info = mCodecInfos.itemAt(startIndex);
+
+        if (info.mIsEncoder == encoder && (info.mTypes & typeMask)) {
+            return startIndex;
+        }
+
+        ++startIndex;
+    }
+
+    return -ENOENT;
+}
+
+ssize_t MediaCodecList::findCodecByName(const char *name) const {
+    for (size_t i = 0; i < mCodecInfos.size(); ++i) {
+        const CodecInfo &info = mCodecInfos.itemAt(i);
+
+        if (info.mName == name) {
+            return i;
+        }
+    }
+
+    return -ENOENT;
+}
+
+const char *MediaCodecList::getCodecName(size_t index) const {
+    if (index >= mCodecInfos.size()) {
+        return NULL;
+    }
+
+    const CodecInfo &info = mCodecInfos.itemAt(index);
+    return info.mName.c_str();
+}
+
+bool MediaCodecList::codecHasQuirk(
+        size_t index, const char *quirkName) const {
+    if (index >= mCodecInfos.size()) {
+        return NULL;
+    }
+
+    const CodecInfo &info = mCodecInfos.itemAt(index);
+
+    if (info.mQuirks != 0) {
+        ssize_t index = mCodecQuirks.indexOfKey(quirkName);
+        if (index >= 0 && info.mQuirks & (1ul << mCodecQuirks.valueAt(index))) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+}  // namespace android