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      1 /*
      2  * Copyright (C) 2010 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 #ifndef ES_QUEUE_H_
     18 
     19 #define ES_QUEUE_H_
     20 
     21 #include <media/stagefright/foundation/ABase.h>
     22 #include <utils/Errors.h>
     23 #include <utils/List.h>
     24 #include <utils/RefBase.h>
     25 
     26 namespace android {
     27 
     28 struct ABuffer;
     29 class MetaData;
     30 
     31 struct ElementaryStreamQueue {
     32     enum Mode {
     33         H264,
     34         AAC,
     35         AC3,
     36         MPEG_AUDIO,
     37         MPEG_VIDEO,
     38         MPEG4_VIDEO,
     39         PCM_AUDIO,
     40         METADATA,
     41     };
     42 
     43     enum Flags {
     44         // Data appended to the queue is always at access unit boundaries.
     45         kFlag_AlignedData = 1,
     46     };
     47     ElementaryStreamQueue(Mode mode, uint32_t flags = 0);
     48 
     49     status_t appendData(const void *data, size_t size, int64_t timeUs);
     50     void signalEOS();
     51     void clear(bool clearFormat);
     52 
     53     sp<ABuffer> dequeueAccessUnit();
     54 
     55     sp<MetaData> getFormat();
     56 
     57 private:
     58     struct RangeInfo {
     59         int64_t mTimestampUs;
     60         size_t mLength;
     61     };
     62 
     63     Mode mMode;
     64     uint32_t mFlags;
     65     bool mEOSReached;
     66 
     67     sp<ABuffer> mBuffer;
     68     List<RangeInfo> mRangeInfos;
     69 
     70     sp<MetaData> mFormat;
     71 
     72     sp<ABuffer> dequeueAccessUnitH264();
     73     sp<ABuffer> dequeueAccessUnitAAC();
     74     sp<ABuffer> dequeueAccessUnitAC3();
     75     sp<ABuffer> dequeueAccessUnitMPEGAudio();
     76     sp<ABuffer> dequeueAccessUnitMPEGVideo();
     77     sp<ABuffer> dequeueAccessUnitMPEG4Video();
     78     sp<ABuffer> dequeueAccessUnitPCMAudio();
     79     sp<ABuffer> dequeueAccessUnitMetadata();
     80 
     81     // consume a logical (compressed) access unit of size "size",
     82     // returns its timestamp in us (or -1 if no time information).
     83     int64_t fetchTimestamp(size_t size);
     84 
     85     DISALLOW_EVIL_CONSTRUCTORS(ElementaryStreamQueue);
     86 };
     87 
     88 }  // namespace android
     89 
     90 #endif  // ES_QUEUE_H_
     91