MediaExtractor.cpp revision ee7ff20e69498ebd53dd9717a0f984188341a75e
1/* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17//#define LOG_NDEBUG 0 18#define LOG_TAG "MediaExtractor" 19#include <utils/Log.h> 20 21#include "include/AMRExtractor.h" 22#include "include/MP3Extractor.h" 23#include "include/MPEG4Extractor.h" 24#include "include/WAVExtractor.h" 25#include "include/OggExtractor.h" 26 27#include <media/stagefright/DataSource.h> 28#include <media/stagefright/MediaDefs.h> 29#include <media/stagefright/MediaExtractor.h> 30#include <media/stagefright/MetaData.h> 31#include <utils/String8.h> 32 33namespace android { 34 35sp<MetaData> MediaExtractor::getMetaData() { 36 return new MetaData; 37} 38 39uint32_t MediaExtractor::flags() const { 40 return CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_PAUSE; 41} 42 43// static 44sp<MediaExtractor> MediaExtractor::Create( 45 const sp<DataSource> &source, const char *mime) { 46 String8 tmp; 47 if (mime == NULL) { 48 float confidence; 49 if (!source->sniff(&tmp, &confidence)) { 50 LOGV("FAILED to autodetect media content."); 51 52 return NULL; 53 } 54 55 mime = tmp.string(); 56 LOGV("Autodetected media content as '%s' with confidence %.2f", 57 mime, confidence); 58 } 59 60 if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_MPEG4) 61 || !strcasecmp(mime, "audio/mp4")) { 62 return new MPEG4Extractor(source); 63 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_MPEG)) { 64 return new MP3Extractor(source); 65 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_NB) 66 || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_WB)) { 67 return new AMRExtractor(source); 68 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_WAV)) { 69 return new WAVExtractor(source); 70 } else if (!strcasecmp(mime, MEDIA_MIMETYPE_CONTAINER_OGG)) { 71 return new OggExtractor(source); 72 } 73 74 return NULL; 75} 76 77} // namespace android 78