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
26namespace android {
27
28class VideoSource : public MediaSource {
29    static const int32_t kFramerate = 24;  // fps
30
31public:
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
83protected:
84    virtual ~VideoSource() {}
85
86private:
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_
99