Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 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 VIDEO_SOURCE_H_ |
| 18 | |
| 19 | #define VIDEO_SOURCE_H_ |
| 20 | |
| 21 | #include <media/stagefright/MediaBufferGroup.h> |
| 22 | #include <media/stagefright/MediaDefs.h> |
| 23 | #include <media/stagefright/MediaSource.h> |
| 24 | #include <media/stagefright/MetaData.h> |
| 25 | |
| 26 | namespace android { |
| 27 | |
| 28 | class VideoSource : public MediaSource { |
| 29 | static const int32_t kFramerate = 24; // fps |
| 30 | |
| 31 | public: |
| 32 | VideoSource(int width, int height) |
| 33 | : mWidth(width), |
| 34 | mHeight(height), |
| 35 | mSize((width * height * 3) / 2) { |
| 36 | mGroup.add_buffer(new MediaBuffer(mSize)); |
| 37 | } |
| 38 | |
| 39 | virtual sp<MetaData> getFormat() { |
| 40 | sp<MetaData> meta = new MetaData; |
| 41 | meta->setInt32(kKeyWidth, mWidth); |
| 42 | meta->setInt32(kKeyHeight, mHeight); |
| 43 | meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_RAW); |
| 44 | |
| 45 | return meta; |
| 46 | } |
| 47 | |
| 48 | virtual status_t start(MetaData *params) { |
| 49 | mNumFramesOutput = 0; |
| 50 | return OK; |
| 51 | } |
| 52 | |
| 53 | virtual status_t stop() { |
| 54 | return OK; |
| 55 | } |
| 56 | |
| 57 | virtual status_t read( |
| 58 | MediaBuffer **buffer, const MediaSource::ReadOptions *options) { |
| 59 | if (mNumFramesOutput == kFramerate * 100) { |
| 60 | // Stop returning data after 10 secs. |
| 61 | return ERROR_END_OF_STREAM; |
| 62 | } |
| 63 | |
| 64 | // printf("VideoSource::read\n"); |
| 65 | status_t err = mGroup.acquire_buffer(buffer); |
| 66 | if (err != OK) { |
| 67 | return err; |
| 68 | } |
| 69 | |
| 70 | char x = (char)((double)rand() / RAND_MAX * 255); |
| 71 | memset((*buffer)->data(), x, mSize); |
| 72 | (*buffer)->set_range(0, mSize); |
| 73 | (*buffer)->meta_data()->clear(); |
| 74 | (*buffer)->meta_data()->setInt64( |
| 75 | kKeyTime, (mNumFramesOutput * 1000000) / kFramerate); |
| 76 | ++mNumFramesOutput; |
| 77 | |
| 78 | // printf("VideoSource::read - returning buffer\n"); |
| 79 | // LOG(INFO)("VideoSource::read - returning buffer"); |
| 80 | return OK; |
| 81 | } |
| 82 | |
| 83 | protected: |
| 84 | virtual ~VideoSource() {} |
| 85 | |
| 86 | private: |
| 87 | MediaBufferGroup mGroup; |
| 88 | int mWidth, mHeight; |
| 89 | size_t mSize; |
| 90 | int64_t mNumFramesOutput;; |
| 91 | |
| 92 | VideoSource(const VideoSource &); |
| 93 | VideoSource &operator=(const VideoSource &); |
| 94 | }; |
| 95 | |
| 96 | } // namespace android |
| 97 | |
| 98 | #endif // VIDEO_SOURCE_H_ |