1/*
2 * Copyright (C) 2011 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 "DummyAudioSource"
19#include <utils/Log.h>
20#include <media/stagefright/foundation/ADebug.h>
21#include <media/stagefright/MediaErrors.h>
22#include <media/stagefright/MediaDefs.h>
23#include <media/stagefright/MediaBufferGroup.h>
24#include <media/stagefright/MetaData.h>
25#include "DummyAudioSource.h"
26
27
28namespace android {
29
30//static
31sp<DummyAudioSource> DummyAudioSource::Create(
32        int32_t samplingRate, int32_t channelCount,
33        int64_t frameDurationUs, int64_t audioDurationUs) {
34
35    ALOGV("Create ");
36    return new DummyAudioSource(samplingRate,
37                                channelCount,
38                                frameDurationUs,
39                                audioDurationUs);
40
41}
42
43DummyAudioSource::DummyAudioSource(
44        int32_t samplingRate, int32_t channelCount,
45        int64_t frameDurationUs, int64_t audioDurationUs)
46    : mSamplingRate(samplingRate),
47      mChannelCount(channelCount),
48      mFrameDurationUs(frameDurationUs),
49      mNumberOfSamplePerFrame(0),
50      mAudioDurationUs(audioDurationUs),
51      mTimeStampUs(0),
52      mBufferGroup(NULL) {
53
54    mNumberOfSamplePerFrame = (int32_t)
55            ((1L * mSamplingRate * mFrameDurationUs)/1000000);
56    mNumberOfSamplePerFrame = mNumberOfSamplePerFrame  * mChannelCount;
57
58    ALOGV("Constructor: E");
59    ALOGV("samplingRate = %d", samplingRate);
60    ALOGV("channelCount = %d", channelCount);
61    ALOGV("frameDurationUs = %lld", frameDurationUs);
62    ALOGV("audioDurationUs = %lld", audioDurationUs);
63    ALOGV("mNumberOfSamplePerFrame = %d", mNumberOfSamplePerFrame);
64    ALOGV("Constructor: X");
65}
66
67DummyAudioSource::~DummyAudioSource() {
68    /* Do nothing here? */
69    ALOGV("~DummyAudioSource");
70}
71
72void DummyAudioSource::setDuration(int64_t audioDurationUs) {
73    ALOGV("setDuration: %lld us added to %lld us",
74        audioDurationUs, mAudioDurationUs);
75
76    Mutex::Autolock autoLock(mLock);
77    mAudioDurationUs += audioDurationUs;
78}
79
80status_t DummyAudioSource::start(MetaData *params) {
81    ALOGV("start: E");
82    status_t err = OK;
83
84    mTimeStampUs = 0;
85
86    mBufferGroup = new MediaBufferGroup;
87    mBufferGroup->add_buffer(
88            new MediaBuffer(mNumberOfSamplePerFrame * sizeof(int16_t)));
89
90    ALOGV("start: X");
91
92    return err;
93}
94
95status_t DummyAudioSource::stop() {
96    ALOGV("stop");
97
98    delete mBufferGroup;
99    mBufferGroup = NULL;
100
101    return OK;
102}
103
104
105sp<MetaData> DummyAudioSource::getFormat() {
106    ALOGV("getFormat");
107
108    sp<MetaData> meta = new MetaData;
109    meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_RAW);
110    meta->setInt32(kKeyChannelCount, mChannelCount);
111    meta->setInt32(kKeySampleRate, mSamplingRate);
112    meta->setInt64(kKeyDuration, mFrameDurationUs);
113    meta->setCString(kKeyDecoderComponent, "DummyAudioSource");
114
115    return meta;
116}
117
118status_t DummyAudioSource::read(
119        MediaBuffer **out, const MediaSource::ReadOptions *options) {
120
121    ALOGV("read: E");
122
123    int64_t seekTimeUs;
124    ReadOptions::SeekMode mode;
125
126    if (options && options->getSeekTo(&seekTimeUs, &mode)) {
127        CHECK(seekTimeUs >= 0);
128        mTimeStampUs = seekTimeUs;
129    }
130
131    {
132        Mutex::Autolock autoLock(mLock);
133        if (mTimeStampUs >= mAudioDurationUs) {
134            ALOGI("read: EOS reached %lld > %lld",
135                mTimeStampUs, mAudioDurationUs);
136
137            *out = NULL;
138            return ERROR_END_OF_STREAM;
139        }
140    }
141
142    MediaBuffer *buffer;
143    status_t err = mBufferGroup->acquire_buffer(&buffer);
144    if (err != OK) {
145        ALOGE("Failed to acquire buffer from mBufferGroup: %d", err);
146        return err;
147    }
148
149    memset((uint8_t *) buffer->data() + buffer->range_offset(),
150            0, mNumberOfSamplePerFrame << 1);
151    buffer->set_range(buffer->range_offset(), (mNumberOfSamplePerFrame << 1));
152    buffer->meta_data()->setInt64(kKeyTime, mTimeStampUs);
153
154    ALOGV("read: offset  = %d, size = %d, mTimeStampUs = %lld",
155             buffer->range_offset(), buffer->size(), mTimeStampUs);
156
157    mTimeStampUs = mTimeStampUs + mFrameDurationUs;
158    *out = buffer;
159
160    return OK;
161}
162
163}// namespace android
164