| /* |
| * 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 "include/AMRExtractor.h" |
| #include "include/MP3Extractor.h" |
| #include "include/MPEG4Extractor.h" |
| |
| #include <media/stagefright/DataSource.h> |
| #include <media/stagefright/MediaErrors.h> |
| #include <utils/String8.h> |
| |
| namespace android { |
| |
| bool DataSource::getUInt16(off_t offset, uint16_t *x) { |
| *x = 0; |
| |
| uint8_t byte[2]; |
| if (readAt(offset, byte, 2) != 2) { |
| return false; |
| } |
| |
| *x = (byte[0] << 8) | byte[1]; |
| |
| return true; |
| } |
| |
| 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); |
| RegisterSniffer(SniffAMR); |
| } |
| |
| } // namespace android |