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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// #define LOG_NDEBUG 0
#define LOG_TAG "DummyAudioSource"
#include <utils/Log.h>
#include <media/stagefright/foundation/ADebug.h>
#include <media/stagefright/MediaErrors.h>
#include <media/stagefright/MediaDefs.h>
#include <media/stagefright/MediaBufferGroup.h>
#include <media/stagefright/MetaData.h>
#include "DummyAudioSource.h"
namespace android {
//static
sp<DummyAudioSource> DummyAudioSource::Create(
int32_t samplingRate, int32_t channelCount,
int64_t frameDurationUs, int64_t audioDurationUs) {
ALOGV("Create ");
return new DummyAudioSource(samplingRate,
channelCount,
frameDurationUs,
audioDurationUs);
}
DummyAudioSource::DummyAudioSource(
int32_t samplingRate, int32_t channelCount,
int64_t frameDurationUs, int64_t audioDurationUs)
: mSamplingRate(samplingRate),
mChannelCount(channelCount),
mFrameDurationUs(frameDurationUs),
mNumberOfSamplePerFrame(0),
mAudioDurationUs(audioDurationUs),
mTimeStampUs(0),
mBufferGroup(NULL) {
mNumberOfSamplePerFrame = (int32_t)
((1L * mSamplingRate * mFrameDurationUs)/1000000);
mNumberOfSamplePerFrame = mNumberOfSamplePerFrame * mChannelCount;
ALOGV("Constructor: E");
ALOGV("samplingRate = %d", samplingRate);
ALOGV("channelCount = %d", channelCount);
ALOGV("frameDurationUs = %lld", frameDurationUs);
ALOGV("audioDurationUs = %lld", audioDurationUs);
ALOGV("mNumberOfSamplePerFrame = %d", mNumberOfSamplePerFrame);
ALOGV("Constructor: X");
}
DummyAudioSource::~DummyAudioSource() {
/* Do nothing here? */
ALOGV("~DummyAudioSource");
}
void DummyAudioSource::setDuration(int64_t audioDurationUs) {
ALOGV("setDuration: %lld us added to %lld us",
audioDurationUs, mAudioDurationUs);
Mutex::Autolock autoLock(mLock);
mAudioDurationUs += audioDurationUs;
}
status_t DummyAudioSource::start(MetaData *params) {
ALOGV("start: E");
status_t err = OK;
mTimeStampUs = 0;
mBufferGroup = new MediaBufferGroup;
mBufferGroup->add_buffer(
new MediaBuffer(mNumberOfSamplePerFrame * sizeof(int16_t)));
ALOGV("start: X");
return err;
}
status_t DummyAudioSource::stop() {
ALOGV("stop");
delete mBufferGroup;
mBufferGroup = NULL;
return OK;
}
sp<MetaData> DummyAudioSource::getFormat() {
ALOGV("getFormat");
sp<MetaData> meta = new MetaData;
meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_RAW);
meta->setInt32(kKeyChannelCount, mChannelCount);
meta->setInt32(kKeySampleRate, mSamplingRate);
meta->setInt64(kKeyDuration, mFrameDurationUs);
meta->setCString(kKeyDecoderComponent, "DummyAudioSource");
return meta;
}
status_t DummyAudioSource::read(
MediaBuffer **out, const MediaSource::ReadOptions *options) {
ALOGV("read: E");
int64_t seekTimeUs;
ReadOptions::SeekMode mode;
if (options && options->getSeekTo(&seekTimeUs, &mode)) {
CHECK(seekTimeUs >= 0);
mTimeStampUs = seekTimeUs;
}
{
Mutex::Autolock autoLock(mLock);
if (mTimeStampUs >= mAudioDurationUs) {
ALOGI("read: EOS reached %lld > %lld",
mTimeStampUs, mAudioDurationUs);
*out = NULL;
return ERROR_END_OF_STREAM;
}
}
MediaBuffer *buffer;
status_t err = mBufferGroup->acquire_buffer(&buffer);
if (err != OK) {
ALOGE("Failed to acquire buffer from mBufferGroup: %d", err);
return err;
}
memset((uint8_t *) buffer->data() + buffer->range_offset(),
0, mNumberOfSamplePerFrame << 1);
buffer->set_range(buffer->range_offset(), (mNumberOfSamplePerFrame << 1));
buffer->meta_data()->setInt64(kKeyTime, mTimeStampUs);
ALOGV("read: offset = %d, size = %d, mTimeStampUs = %lld",
buffer->range_offset(), buffer->size(), mTimeStampUs);
mTimeStampUs = mTimeStampUs + mFrameDurationUs;
*out = buffer;
return OK;
}
}// namespace android
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