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* Copyright 2016, 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#include <map>
#include <memory>
#include <mutex>
#include <vector>
#include <media/openmax/OMX_Types.h>
#include <media/stagefright/CodecBase.h>
#include <media/ICrypto.h>
#include <media/IOMX.h>
namespace android {
* BufferChannelBase implementation for ACodec.
class ACodecBufferChannel : public BufferChannelBase {
struct BufferAndId {
sp<MediaCodecBuffer> mBuffer;
IOMX::buffer_id mBufferId;
struct BufferInfo {
const sp<MediaCodecBuffer> &buffer,
IOMX::buffer_id bufferId,
const sp<IMemory> &sharedEncryptedBuffer);
BufferInfo() = delete;
// Buffer facing MediaCodec and its clients.
const sp<MediaCodecBuffer> mClientBuffer;
// Buffer facing CodecBase.
const sp<MediaCodecBuffer> mCodecBuffer;
// OMX buffer ID.
const IOMX::buffer_id mBufferId;
// Encrypted buffer in case of secure input.
const sp<IMemory> mSharedEncryptedBuffer;
const sp<AMessage> &inputBufferFilled, const sp<AMessage> &outputBufferDrained);
virtual ~ACodecBufferChannel();
// BufferChannelBase interface
virtual status_t queueInputBuffer(const sp<MediaCodecBuffer> &buffer) override;
virtual status_t queueSecureInputBuffer(
const sp<MediaCodecBuffer> &buffer,
bool secure,
const uint8_t *key,
const uint8_t *iv,
CryptoPlugin::Mode mode,
CryptoPlugin::Pattern pattern,
const CryptoPlugin::SubSample *subSamples,
size_t numSubSamples,
AString *errorDetailMsg) override;
virtual status_t renderOutputBuffer(
const sp<MediaCodecBuffer> &buffer, int64_t timestampNs) override;
virtual status_t discardBuffer(const sp<MediaCodecBuffer> &buffer) override;
virtual void getInputBufferArray(Vector<sp<MediaCodecBuffer>> *array) override;
virtual void getOutputBufferArray(Vector<sp<MediaCodecBuffer>> *array) override;
// Methods below are interface for ACodec to use.
* Set input buffer array.
* @param array Newly allocated buffers. Empty if buffers are
* deallocated.
void setInputBufferArray(const std::vector<BufferAndId> &array);
* Set output buffer array.
* @param array Newly allocated buffers. Empty if buffers are
* deallocated.
void setOutputBufferArray(const std::vector<BufferAndId> &array);
* Request MediaCodec to fill the specified input buffer.
* @param bufferId ID of the buffer, assigned by underlying component.
void fillThisBuffer(IOMX::buffer_id bufferID);
* Request MediaCodec to drain the specified output buffer.
* @param bufferId ID of the buffer, assigned by underlying component.
* @param omxFlags flags associated with this buffer (e.g. EOS).
void drainThisBuffer(IOMX::buffer_id bufferID, OMX_U32 omxFlags);
const sp<AMessage> mInputBufferFilled;
const sp<AMessage> mOutputBufferDrained;
sp<MemoryDealer> mDealer;
sp<IMemory> mDecryptDestination;
int32_t mHeapSeqNum;
// These should only be accessed via std::atomic_* functions.
// Note on thread safety: since the vector and BufferInfo are const, it's
// safe to read them at any thread once the shared_ptr object is atomically
// obtained. Inside BufferInfo, mBufferId and mSharedEncryptedBuffer are
// immutable objects. We write internal states of mClient/CodecBuffer when
// the caller has given up the reference, so that access is also safe.
std::shared_ptr<const std::vector<const BufferInfo>> mInputBuffers;
std::shared_ptr<const std::vector<const BufferInfo>> mOutputBuffers;
sp<MemoryDealer> makeMemoryDealer(size_t heapSize);
bool hasCryptoOrDescrambler() {
return mCrypto != NULL || mDescrambler != NULL;
} // namespace android