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5fe1464d84
We are pre-allocating shmems in the content process for use by the CDM in the GMP process. We guess the size of shmem required. However if we guess wrong, currently we always end up taking the non-shmem path for video frames to return to the content process, which results in us sending another shmem (of the wrong size) to the CDM, and this continues until we hit the limit on the number of shmems that we tolerate the CDM asking for. So in this patch, I change our behaviour to detect when we're allocating shmems that are too small, whereupon we purge the existing shmems and switch to allocating them at the size being requested by the CDM. This means we recover from incorrectly guessing the size of shmems required by the CDM. The overhead of an incorrect guess should be one video frame transferred via the nsTArray path. MozReview-Commit-ID: 8o1s7FI2UBd --HG-- extra : rebase_source : 0612d199686278612e8c58dc97e96a9304ea3ee9
113 lines
3.2 KiB
Plaintext
113 lines
3.2 KiB
Plaintext
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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include protocol PGMPContent;
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include GMPTypes;
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namespace mozilla {
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namespace gmp {
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async protocol PChromiumCDM
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{
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manager PGMPContent;
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child:
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// cdm::ContentDecryptionModule8
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async Init(bool aAllowDistinctiveIdentifier,
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bool aAllowPersistentState);
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async SetServerCertificate(uint32_t aPromiseId,
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uint8_t[] aServerCert);
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async CreateSessionAndGenerateRequest(uint32_t aPromiseId,
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uint32_t aSessionType,
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uint32_t aInitDataType,
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uint8_t[] aInitData);
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async LoadSession(uint32_t aPromiseId,
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uint32_t aSessionType,
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nsCString aSessionId);
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async UpdateSession(uint32_t aPromiseId,
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nsCString aSessionId,
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uint8_t[] aResponse);
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async CloseSession(uint32_t aPromiseId,
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nsCString aSessionId);
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async RemoveSession(uint32_t aPromiseId,
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nsCString aSessionId);
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async Decrypt(uint32_t aId, CDMInputBuffer aBuffer);
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async InitializeVideoDecoder(CDMVideoDecoderConfig aConfig);
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async DeinitializeVideoDecoder();
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async ResetVideoDecoder();
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async DecryptAndDecodeFrame(CDMInputBuffer aBuffer);
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async Drain();
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async Destroy();
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async GiveBuffer(Shmem aShmem);
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async PurgeShmems();
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parent:
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async __delete__();
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// cdm::Host8
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async OnResolveNewSessionPromise(uint32_t aPromiseId, nsCString aSessionId);
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async OnResolvePromise(uint32_t aPromiseId);
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async OnRejectPromise(uint32_t aPromiseId,
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uint32_t aError,
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uint32_t aSystemCode,
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nsCString aErrorMessage);
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async OnSessionMessage(nsCString aSessionId,
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uint32_t aMessageType,
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uint8_t[] aMessage);
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async OnSessionKeysChange(nsCString aSessionId,
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CDMKeyInformation[] aKeysInfo);
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async OnExpirationChange(nsCString aSessionId,
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double aSecondsSinceEpoch);
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async OnSessionClosed(nsCString aSessionId);
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async OnLegacySessionError(nsCString aSessionId,
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uint32_t aError,
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uint32_t aSystemCode,
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nsCString aMessage);
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async ResolveLoadSessionPromise(uint32_t aPromiseId, bool aSuccessful);
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// Return values of cdm::ContentDecryptionModule8::Decrypt
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async Decrypted(uint32_t aId, uint32_t aStatus, Shmem aDecryptedData);
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async DecryptFailed(uint32_t aId, uint32_t aStatus);
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async OnDecoderInitDone(uint32_t aStatus);
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// Return values of cdm::ContentDecryptionModule8::DecryptAndDecodeFrame
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async DecodedShmem(CDMVideoFrame aFrame, Shmem aData);
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async DecodedData(CDMVideoFrame aFrame, uint8_t[] aData);
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async DecodeFailed(uint32_t aStatus);
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async ResetVideoDecoderComplete();
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async DrainComplete();
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async Shutdown();
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};
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} // namespace gmp
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} // namespace mozilla
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