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Diffstat (limited to 'media/libstagefright/DataSource.cpp')
-rw-r--r-- | media/libstagefright/DataSource.cpp | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/media/libstagefright/DataSource.cpp b/media/libstagefright/DataSource.cpp new file mode 100644 index 0000000..6e6b43d --- /dev/null +++ b/media/libstagefright/DataSource.cpp @@ -0,0 +1,76 @@ +/* + * 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. + */ + +#include <media/stagefright/DataSource.h> +#include <media/stagefright/MediaErrors.h> +#include <media/stagefright/MP3Extractor.h> +#include <media/stagefright/MPEG4Extractor.h> +#include <utils/String8.h> + +namespace android { + +status_t DataSource::getSize(off_t *size) { + *size = 0; + + return ERROR_UNSUPPORTED; +} + +//////////////////////////////////////////////////////////////////////////////// + +Mutex DataSource::gSnifferMutex; +List<DataSource::SnifferFunc> DataSource::gSniffers; + +bool DataSource::sniff(String8 *mimeType, float *confidence) { + *mimeType = ""; + *confidence = 0.0f; + + Mutex::Autolock autoLock(gSnifferMutex); + for (List<SnifferFunc>::iterator it = gSniffers.begin(); + it != gSniffers.end(); ++it) { + String8 newMimeType; + float newConfidence; + if ((*it)(this, &newMimeType, &newConfidence)) { + if (newConfidence > *confidence) { + *mimeType = newMimeType; + *confidence = newConfidence; + } + } + } + + return *confidence > 0.0; +} + +// static +void DataSource::RegisterSniffer(SnifferFunc func) { + Mutex::Autolock autoLock(gSnifferMutex); + + for (List<SnifferFunc>::iterator it = gSniffers.begin(); + it != gSniffers.end(); ++it) { + if (*it == func) { + return; + } + } + + gSniffers.push_back(func); +} + +// static +void DataSource::RegisterDefaultSniffers() { + RegisterSniffer(SniffMP3); + RegisterSniffer(SniffMPEG4); +} + +} // namespace android |