DataSourceBase.cpp revision 693d271e62a3726689ff68f4505ba49228eb94b2
120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber/* 220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * Copyright (C) 2009 The Android Open Source Project 320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * 420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * you may not use this file except in compliance with the License. 620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * You may obtain a copy of the License at 720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * 820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * 1020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * Unless required by applicable law or agreed to in writing, software 1120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 1220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * See the License for the specific language governing permissions and 1420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * limitations under the License. 1520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber */ 1620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 1720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/DataSource.h> 1820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/MediaErrors.h> 1920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/MP3Extractor.h> 2020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <media/stagefright/MPEG4Extractor.h> 2120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber#include <utils/String8.h> 2220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 2320111aa043c5f404472bc63b90bc5aad906b1101Andreas Hubernamespace android { 2420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 25693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huberbool DataSource::getUInt16(off_t offset, uint16_t *x) { 26693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber *x = 0; 27693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber 28693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber uint8_t byte[2]; 29693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber if (read_at(offset, byte, 2) != 2) { 30693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber return false; 31693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber } 32693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber 33693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber *x = (byte[0] << 8) | byte[1]; 34693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber 35693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber return true; 36693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber} 37693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber 3820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberstatus_t DataSource::getSize(off_t *size) { 3920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber *size = 0; 4020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 4120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return ERROR_UNSUPPORTED; 4220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 4320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 4420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber//////////////////////////////////////////////////////////////////////////////// 4520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 4620111aa043c5f404472bc63b90bc5aad906b1101Andreas HuberMutex DataSource::gSnifferMutex; 4720111aa043c5f404472bc63b90bc5aad906b1101Andreas HuberList<DataSource::SnifferFunc> DataSource::gSniffers; 4820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 4920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberbool DataSource::sniff(String8 *mimeType, float *confidence) { 5020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber *mimeType = ""; 5120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber *confidence = 0.0f; 5220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 5320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber Mutex::Autolock autoLock(gSnifferMutex); 5420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber for (List<SnifferFunc>::iterator it = gSniffers.begin(); 5520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber it != gSniffers.end(); ++it) { 5620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber String8 newMimeType; 5720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber float newConfidence; 5820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber if ((*it)(this, &newMimeType, &newConfidence)) { 5920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber if (newConfidence > *confidence) { 6020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber *mimeType = newMimeType; 6120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber *confidence = newConfidence; 6220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 6320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 6420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 6520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 6620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return *confidence > 0.0; 6720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 6820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 6920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber// static 7020111aa043c5f404472bc63b90bc5aad906b1101Andreas Hubervoid DataSource::RegisterSniffer(SnifferFunc func) { 7120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber Mutex::Autolock autoLock(gSnifferMutex); 7220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 7320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber for (List<SnifferFunc>::iterator it = gSniffers.begin(); 7420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber it != gSniffers.end(); ++it) { 7520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber if (*it == func) { 7620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber return; 7720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 7820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 7920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 8020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber gSniffers.push_back(func); 8120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 8220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 8320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber// static 8420111aa043c5f404472bc63b90bc5aad906b1101Andreas Hubervoid DataSource::RegisterDefaultSniffers() { 8520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber RegisterSniffer(SniffMP3); 8620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber RegisterSniffer(SniffMPEG4); 8720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} 8820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 8920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber} // namespace android 90