Allow widevinecdmadapter to be built in Chromium

media/cdm/ppapi/stub/stub_cdm.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "media/cdm/ppapi/stub/stub_cdm.h"
+
+#include "base/logging.h"
+
+const char kStubCdmVersion[] = "0.1.0.1";

[xhwang, 2015/03/30 17:23:50]

Let's have some versioning scheme here. How about 1.4.8.0? When the CDM
interface version increments, we'll update the 3rd number. Other numbers will
not likely to change.

[jrummell, 2015/04/01 23:37:36]

Is the version used for anything? Changed to 1.4.8.0 and added a comment, but
not clear what difference this makes.

+
+void INITIALIZE_CDM_MODULE() {
+}
+
+void DeinitializeCdmModule() {
+}
+
+void* CreateCdmInstance(int cdm_interface_version,
+                        const char* /* key_system */,
+                        uint32_t /* key_system_size */,
+                        GetCdmHostFunc get_cdm_host_func,
+                        void* user_data) {
+  DVLOG(1) << "CreateCdmInstance()";
+
+  if (cdm_interface_version != media::StubCdmInterface::kVersion)
+    return nullptr;
+
+  media::StubCdmInterface::Host* host =
+      static_cast<media::StubCdmInterface::Host*>(get_cdm_host_func(
+          media::StubCdmInterface::Host::kVersion, user_data));
+  if (!host)
+    return nullptr;
+
+  return new media::StubCdm(host);
+}
+
+const char* GetCdmVersion() {
+  return kStubCdmVersion;
+}
+
+namespace media {
+
+StubCdm::StubCdm(Host* host) : host_(host) {
+}
+
+StubCdm::~StubCdm() {
+}
+
+void StubCdm::Initialize(bool /* allow_distinctive_identifier */,
+                         bool /* allow_persistent_state */) {
+}
+
+void StubCdm::CreateSessionAndGenerateRequest(
+    uint32 promise_id,
+    cdm::SessionType /* session_type */,
+    cdm::InitDataType /* init_data_type */,
+    const uint8* /* init_data */,
+    uint32 /* init_data_size */) {
+  FailRequest(promise_id);

[ddorwin, 2015/03/28 04:00:11]

Succeed if the parameters are valid. Also, call host_->SendMessage().

[jrummell, 2015/04/01 23:37:36]

Done.

+}
+
+void StubCdm::LoadSession(uint32 promise_id,
+                          cdm::SessionType /* session_type */,
+                          const char* /* session_id */,
+                          uint32_t /* session_id_length */) {
+  FailRequest(promise_id);
+}
+
+void StubCdm::UpdateSession(uint32 promise_id,
+                            const char* /* session_id */,
+                            uint32_t /* session_id_length */,
+                            const uint8* /* response */,
+                            uint32 /* response_size */) {
+  FailRequest(promise_id);
+}
+
+void StubCdm::CloseSession(uint32 promise_id,
+                           const char* /* session_id */,
+                           uint32_t /* session_id_length */) {
+  FailRequest(promise_id);
+}
+
+void StubCdm::RemoveSession(uint32 promise_id,
+                            const char* /* session_id */,
+                            uint32_t /* session_id_length */) {
+  FailRequest(promise_id);
+}
+
+void StubCdm::SetServerCertificate(
+    uint32 promise_id,
+    const uint8_t* /* server_certificate_data */,
+    uint32_t /* server_certificate_data_size */) {
+  FailRequest(promise_id);
+}
+
+void StubCdm::TimerExpired(void* /* context */) {
+}
+
+cdm::Status StubCdm::Decrypt(const cdm::InputBuffer& /* encrypted_buffer */,
+                             cdm::DecryptedBlock* /* decrypted_block */) {
+  return cdm::kDecryptError;
+}
+
+cdm::Status StubCdm::InitializeAudioDecoder(
+    const cdm::AudioDecoderConfig& /* audio_decoder_config */) {
+  return cdm::kDecryptError;
+}
+
+cdm::Status StubCdm::InitializeVideoDecoder(
+    const cdm::VideoDecoderConfig& /* video_decoder_config */) {
+  return cdm::kDecryptError;
+}
+
+void StubCdm::ResetDecoder(cdm::StreamType /* decoder_type */) {
+}
+
+void StubCdm::DeinitializeDecoder(cdm::StreamType /* decoder_type */) {
+}
+
+cdm::Status StubCdm::DecryptAndDecodeFrame(
+    const cdm::InputBuffer& /* encrypted_buffer */,
+    cdm::VideoFrame* /* decoded_frame */) {
+  return cdm::kDecryptError;
+}
+
+cdm::Status StubCdm::DecryptAndDecodeSamples(
+    const cdm::InputBuffer& /* encrypted_buffer */,
+    cdm::AudioFrames* /* audio_frames */) {
+  return cdm::kDecryptError;
+}
+
+void StubCdm::Destroy() {
+  delete this;
+}
+
+void StubCdm::OnPlatformChallengeResponse(
+    const cdm::PlatformChallengeResponse& /* response */) {
+  NOTIMPLEMENTED();

[xhwang, 2015/03/30 17:23:50]

NOTREACHED();

[jrummell, 2015/04/01 23:37:36]

Done.

+}
+
+void StubCdm::OnQueryOutputProtectionStatus(
+    cdm::QueryResult /* result */,
+    uint32_t /* link_mask */,
+    uint32_t /* output_protection_mask */) {
+  NOTIMPLEMENTED();

[xhwang, 2015/03/30 17:23:50]

NOTREACHED();

[jrummell, 2015/04/01 23:37:36]

Done.

+};
+
+void StubCdm::FailRequest(uint32 promise_id) {
+  std::string message("Stub CDM.");

[xhwang, 2015/03/30 17:23:50]

nit: "Operation not supported by stub CDM"?

[jrummell, 2015/04/01 23:37:36]

Done.

+  host_->OnRejectPromise(promise_id, cdm::kInvalidAccessError, 0,
+                         message.data(), message.length());
+}
+
+}  // namespace media