Extractor plugins now use MediaSourceBase, which is not refcounted. Framework-side MediaSource derives from MediaSourceBase and RefBase. Bug: 67908556 Test: build, boot Change-Id: Ie33ca07f0d0ba783a504d7b7bf1a75ca4acdd745gugelfrei
Marco Nelissen
7 years ago
parent
7d880c31d2
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cb30d8477c
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../../media/libmediaextractor/include/media/MediaSourceBase.h
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/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <media/MediaSourceBase.h>
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namespace android {
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MediaSourceBase::MediaSourceBase() {}
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MediaSourceBase::~MediaSourceBase() {}
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////////////////////////////////////////////////////////////////////////////////
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MediaSourceBase::ReadOptions::ReadOptions() {
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reset();
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}
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void MediaSourceBase::ReadOptions::reset() {
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mOptions = 0;
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mSeekTimeUs = 0;
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mNonBlocking = false;
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}
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void MediaSourceBase::ReadOptions::setNonBlocking() {
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mNonBlocking = true;
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}
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void MediaSourceBase::ReadOptions::clearNonBlocking() {
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mNonBlocking = false;
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}
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bool MediaSourceBase::ReadOptions::getNonBlocking() const {
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return mNonBlocking;
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}
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void MediaSourceBase::ReadOptions::setSeekTo(int64_t time_us, SeekMode mode) {
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mOptions |= kSeekTo_Option;
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mSeekTimeUs = time_us;
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mSeekMode = mode;
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}
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void MediaSourceBase::ReadOptions::clearSeekTo() {
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mOptions &= ~kSeekTo_Option;
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mSeekTimeUs = 0;
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mSeekMode = SEEK_CLOSEST_SYNC;
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}
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bool MediaSourceBase::ReadOptions::getSeekTo(
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int64_t *time_us, SeekMode *mode) const {
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*time_us = mSeekTimeUs;
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*mode = mSeekMode;
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return (mOptions & kSeekTo_Option) != 0;
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}
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} // namespace android
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/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MEDIA_SOURCE_BASE_H_
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#define MEDIA_SOURCE_BASE_H_
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#include <sys/types.h>
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#include <binder/IMemory.h>
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#include <binder/MemoryDealer.h>
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#include <media/stagefright/MediaErrors.h>
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#include <media/stagefright/MetaData.h>
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#include <utils/RefBase.h>
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#include <utils/Vector.h>
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namespace android {
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class MediaBuffer;
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class SourceBaseAllocTracker {
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public:
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SourceBaseAllocTracker() {
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ALOGD("sourcebase allocated: %p", this);
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}
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virtual ~SourceBaseAllocTracker() {
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ALOGD("sourcebase freed: %p", this);
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}
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};
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struct MediaSourceBase
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// : public SourceBaseAllocTracker
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{
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MediaSourceBase();
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// To be called before any other methods on this object, except
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// getFormat().
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virtual status_t start(MetaData *params = NULL) = 0;
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// Any blocking read call returns immediately with a result of NO_INIT.
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// It is an error to call any methods other than start after this call
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// returns. Any buffers the object may be holding onto at the time of
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// the stop() call are released.
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// Also, it is imperative that any buffers output by this object and
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// held onto by callers be released before a call to stop() !!!
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virtual status_t stop() = 0;
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// Returns the format of the data output by this media source.
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virtual sp<MetaData> getFormat() = 0;
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// Options that modify read() behaviour. The default is to
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// a) not request a seek
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// b) not be late, i.e. lateness_us = 0
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struct ReadOptions {
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enum SeekMode : int32_t {
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SEEK_PREVIOUS_SYNC,
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SEEK_NEXT_SYNC,
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SEEK_CLOSEST_SYNC,
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SEEK_CLOSEST,
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SEEK_FRAME_INDEX,
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};
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ReadOptions();
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// Reset everything back to defaults.
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void reset();
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void setSeekTo(int64_t time_us, SeekMode mode = SEEK_CLOSEST_SYNC);
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void clearSeekTo();
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bool getSeekTo(int64_t *time_us, SeekMode *mode) const;
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void setNonBlocking();
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void clearNonBlocking();
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bool getNonBlocking() const;
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// Used to clear all non-persistent options for multiple buffer reads.
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void clearNonPersistent() {
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clearSeekTo();
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}
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private:
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enum Options {
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kSeekTo_Option = 1,
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};
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uint32_t mOptions;
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int64_t mSeekTimeUs;
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SeekMode mSeekMode;
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bool mNonBlocking;
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} __attribute__((packed)); // sent through Binder
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// Returns a new buffer of data. Call blocks until a
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// buffer is available, an error is encountered of the end of the stream
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// is reached.
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// End of stream is signalled by a result of ERROR_END_OF_STREAM.
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// A result of INFO_FORMAT_CHANGED indicates that the format of this
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// MediaSource has changed mid-stream, the client can continue reading
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// but should be prepared for buffers of the new configuration.
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virtual status_t read(
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MediaBuffer **buffer, const ReadOptions *options = NULL) = 0;
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// Causes this source to suspend pulling data from its upstream source
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// until a subsequent read-with-seek. This is currently not supported
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// as such by any source. E.g. MediaCodecSource does not suspend its
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// upstream source, and instead discard upstream data while paused.
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virtual status_t pause() {
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return ERROR_UNSUPPORTED;
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}
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// The consumer of this media source requests the source stops sending
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// buffers with timestamp larger than or equal to stopTimeUs. stopTimeUs
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// must be in the same time base as the startTime passed in start(). If
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// source does not support this request, ERROR_UNSUPPORTED will be returned.
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// If stopTimeUs is invalid, BAD_VALUE will be returned. This could be
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// called at any time even before source starts and it could be called
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// multiple times. Setting stopTimeUs to be -1 will effectively cancel the stopTimeUs
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// set previously. If stopTimeUs is larger than or equal to last buffer's timestamp,
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// source will start to drop buffer when it gets a buffer with timestamp larger
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// than or equal to stopTimeUs. If stopTimeUs is smaller than or equal to last
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// buffer's timestamp, source will drop all the incoming buffers immediately.
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// After setting stopTimeUs, source may still stop sending buffers with timestamp
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// less than stopTimeUs if it is stopped by the consumer.
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virtual status_t setStopTimeUs(int64_t /* stopTimeUs */) {
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return ERROR_UNSUPPORTED;
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}
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virtual ~MediaSourceBase();
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private:
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MediaSourceBase(const MediaSourceBase &);
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MediaSourceBase &operator=(const MediaSourceBase &);
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};
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} // namespace android
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#endif // MEDIA_SOURCE_BASE_H_
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