diff options
author | James Dong <jdong@google.com> | 2010-06-24 19:55:31 -0700 |
---|---|---|
committer | James Dong <jdong@google.com> | 2010-06-24 21:59:25 -0700 |
commit | 57e7f83c0336db3f03666f077bce4c2692a88cf6 (patch) | |
tree | 5bf133cff79513faeec94e9fc9650e8ac6973196 /media | |
parent | 7fd22aab4506f65b7929ed1030bdd71c56f7db77 (diff) | |
download | frameworks_base-57e7f83c0336db3f03666f077bce4c2692a88cf6.zip frameworks_base-57e7f83c0336db3f03666f077bce4c2692a88cf6.tar.gz frameworks_base-57e7f83c0336db3f03666f077bce4c2692a88cf6.tar.bz2 |
Track maximum amplitude and fix getMaxAmplitude()
- only start to track the max amplitude after the first call to getMaxAmplitude()
Change-Id: I64d3d9ca0542202a8535a211425e8bccceca50fc
Diffstat (limited to 'media')
-rw-r--r-- | media/libmediaplayerservice/StagefrightRecorder.cpp | 8 | ||||
-rw-r--r-- | media/libmediaplayerservice/StagefrightRecorder.h | 2 | ||||
-rw-r--r-- | media/libstagefright/AudioSource.cpp | 29 |
3 files changed, 38 insertions, 1 deletions
diff --git a/media/libmediaplayerservice/StagefrightRecorder.cpp b/media/libmediaplayerservice/StagefrightRecorder.cpp index d49c4e0..ba04d1b 100644 --- a/media/libmediaplayerservice/StagefrightRecorder.cpp +++ b/media/libmediaplayerservice/StagefrightRecorder.cpp @@ -484,6 +484,7 @@ sp<MediaSource> StagefrightRecorder::createAudioSource() { sp<MediaSource> audioEncoder = OMXCodec::Create(client.interface(), encMeta, true /* createEncoder */, audioSource); + mAudioSourceNode = audioSource; return audioEncoder; } @@ -822,6 +823,7 @@ status_t StagefrightRecorder::reset() { mAudioBitRate = 12200; mInterleaveDurationUs = 0; mIFramesInterval = 1; + mAudioSourceNode = 0; mEncoderProfiles = MediaProfiles::getInstance(); mOutputFd = -1; @@ -831,7 +833,11 @@ status_t StagefrightRecorder::reset() { } status_t StagefrightRecorder::getMaxAmplitude(int *max) { - *max = 0; + if (mAudioSourceNode != 0) { + *max = mAudioSourceNode->getMaxAmplitude(); + } else { + *max = 0; + } return OK; } diff --git a/media/libmediaplayerservice/StagefrightRecorder.h b/media/libmediaplayerservice/StagefrightRecorder.h index 7de96f6..6eedf0c 100644 --- a/media/libmediaplayerservice/StagefrightRecorder.h +++ b/media/libmediaplayerservice/StagefrightRecorder.h @@ -26,6 +26,7 @@ namespace android { class Camera; struct MediaSource; struct MediaWriter; +struct AudioSource; class MediaProfiles; struct StagefrightRecorder : public MediaRecorderBase { @@ -64,6 +65,7 @@ private: sp<ISurface> mPreviewSurface; sp<IMediaPlayerClient> mListener; sp<MediaWriter> mWriter; + sp<AudioSource> mAudioSourceNode; audio_source mAudioSource; video_source mVideoSource; diff --git a/media/libstagefright/AudioSource.cpp b/media/libstagefright/AudioSource.cpp index d203dbf..6031797 100644 --- a/media/libstagefright/AudioSource.cpp +++ b/media/libstagefright/AudioSource.cpp @@ -78,6 +78,8 @@ status_t AudioSource::start(MetaData *params) { mCollectStats = true; } + mTrackMaxAmplitude = false; + mMaxAmplitude = 0; mStartTimeUs = 0; int64_t startTimeUs; if (params && params->findInt64(kKeyTime, &startTimeUs)) { @@ -168,6 +170,10 @@ status_t AudioSource::read( return (status_t)n; } + if (mTrackMaxAmplitude) { + trackMaxAmplitude((int16_t *) buffer->data(), n >> 1); + } + uint32_t sampleRate = mRecord->getSampleRate(); int64_t timestampUs = (1000000LL * numFramesRecorded) / sampleRate + mStartTimeUs; buffer->meta_data()->setInt64(kKeyTime, timestampUs); @@ -181,4 +187,27 @@ status_t AudioSource::read( return OK; } +void AudioSource::trackMaxAmplitude(int16_t *data, int nSamples) { + for (int i = nSamples; i > 0; --i) { + int16_t value = *data++; + if (value < 0) { + value = -value; + } + if (mMaxAmplitude < value) { + mMaxAmplitude = value; + } + } +} + +int16_t AudioSource::getMaxAmplitude() { + // First call activates the tracking. + if (!mTrackMaxAmplitude) { + mTrackMaxAmplitude = true; + } + int16_t value = mMaxAmplitude; + mMaxAmplitude = 0; + LOGV("max amplitude since last call: %d", value); + return value; +} + } // namespace android |