Implement Pepper PPB_VideoDecoder interface.

ppapi/proxy/video_decoder_resource_unittest.cc

+// Copyright 2014 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 <GLES2/gl2.h>
+
+#include "base/memory/shared_memory.h"
+#include "base/message_loop/message_loop.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/ppb_video_decoder.h"
+#include "ppapi/proxy/locking_resource_releaser.h"
+#include "ppapi/proxy/plugin_message_filter.h"
+#include "ppapi/proxy/ppapi_message_utils.h"
+#include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/proxy/ppapi_proxy_test.h"
+#include "ppapi/proxy/ppb_graphics_3d_proxy.h"
+#include "ppapi/proxy/video_decoder_constants.h"
+#include "ppapi/proxy/video_decoder_resource.h"
+#include "ppapi/shared_impl/proxy_lock.h"
+#include "ppapi/thunk/thunk.h"
+
+using ppapi::proxy::ResourceMessageTestSink;
+
+namespace ppapi {
+namespace proxy {
+
+namespace {
+
+const PP_Bool kAllowSoftwareFallback = PP_TRUE;
+const PP_Resource kGraphics3D = 7;
+const uint32_t kShmSize = 256;
+const size_t kDecodeBufferSize = 16;
+const uint32_t kDecodeId = 5;
+const uint32_t kTextureId1 = 1;
+const uint32_t kTextureId2 = 2;
+const uint32_t kNumRequestedTextures = 2;
+
+class MockCompletionCallback {
+ public:
+  MockCompletionCallback() : called_(false) {}
+
+  bool called() { return called_; }
+  int32_t result() { return result_; }
+
+  void Reset() { called_ = false; }
+
+  static void Callback(void* user_data, int32_t result) {
+    MockCompletionCallback* that =
+        reinterpret_cast<MockCompletionCallback*>(user_data);
+    that->called_ = true;
+    that->result_ = result;
+  }
+
+ private:
+  bool called_;
+  int32_t result_;
+};
+
+class VideoDecoderResourceTest : public PluginProxyTest {

[Ami GONE FROM CHROMIUM, 2014/05/28 20:50:56]

Only skimmed this file; hopefully other reviewers more familiar with testing
ppapi resources have reviewed it more carefully.

[bbudge, 2014/05/29 00:03:34]

Me too. I plan to add some browser_tests when we have software fallback so we
can run it on all platforms.

+ public:
+  VideoDecoderResourceTest()
+      : decoder_iface_(thunk::GetPPB_VideoDecoder_0_1_Thunk()) {}
+
+  const PPB_VideoDecoder_0_1* decoder_iface() const { return decoder_iface_; }
+
+  void SendReply(const ResourceMessageCallParams& params,
+                 int32_t result,
+                 const IPC::Message& nested_message) {
+    ResourceMessageReplyParams reply_params(params.pp_resource(),
+                                            params.sequence());
+    reply_params.set_result(result);
+    PluginMessageFilter::DispatchResourceReplyForTest(reply_params,
+                                                      nested_message);
+  }
+
+  void SendReplyWithHandle(const ResourceMessageCallParams& params,
+                           int32_t result,
+                           const IPC::Message& nested_message,
+                           const SerializedHandle& handle) {
+    ResourceMessageReplyParams reply_params(params.pp_resource(),
+                                            params.sequence());
+    reply_params.set_result(result);
+    reply_params.AppendHandle(handle);
+    PluginMessageFilter::DispatchResourceReplyForTest(reply_params,
+                                                      nested_message);
+  }
+
+  PP_Resource CreateDecoder() {
+    PP_Resource result = decoder_iface()->Create(pp_instance());
+    if (result) {
+      ProxyAutoLock lock;
+      ppapi::Resource* resource =
+          GetGlobals()->GetResourceTracker()->GetResource(result);
+      proxy::VideoDecoderResource* decoder =
+          static_cast<proxy::VideoDecoderResource*>(resource);
+      decoder->SetForTest();
+    }
+
+    return result;
+  }
+
+  PP_Resource CreateGraphics3d() {
+    ProxyAutoLock lock;
+
+    HostResource host_resource;
+    host_resource.SetHostResource(pp_instance(), kGraphics3D);
+    scoped_refptr<ppapi::proxy::Graphics3D> graphics_3d(
+        new ppapi::proxy::Graphics3D(host_resource));
+    return graphics_3d->GetReference();
+  }
+
+  PP_Resource CreateAndInitializeDecoder() {
+    PP_Resource decoder = CreateDecoder();
+    LockingResourceReleaser graphics3d(CreateGraphics3d());
+    MockCompletionCallback cb;
+    int32_t result = decoder_iface()->Initialize(
+        decoder,
+        graphics3d.get(),
+        PP_VIDEOPROFILE_H264MAIN,
+        PP_TRUE /* allow_software_fallback */,
+        PP_MakeOptionalCompletionCallback(&MockCompletionCallback::Callback,
+                                          &cb));
+    if (result != PP_OK_COMPLETIONPENDING)
+      return 0;
+    ResourceMessageCallParams params;
+    IPC::Message msg;
+    if (!sink().GetFirstResourceCallMatching(
+            PpapiHostMsg_VideoDecoder_Initialize::ID, &params, &msg))
+      return 0;
+    sink().ClearMessages();
+    SendReply(params, PP_OK, PpapiPluginMsg_VideoDecoder_InitializeReply());
+    return decoder;
+  }
+
+  SerializedHandle CreateSharedMemory(uint32_t size) {
+    base::SharedMemory shm;
+    shm.CreateAnonymous(size);
+    base::SharedMemoryHandle shm_handle;
+    shm.ShareToProcess(base::GetCurrentProcessHandle(), &shm_handle);
+    return SerializedHandle(shm_handle, size);
+  }
+
+  int32_t CallDecode(PP_Resource pp_decoder,
+                     MockCompletionCallback* cb,
+                     const PpapiHostMsg_VideoDecoder_GetShm* expected_shm_msg) {
+    // Set up a handler in case the resource sends a sync message to create
+    // shared memory.
+    ResourceSyncCallHandler shm_msg_handler(
+        &sink(), PpapiHostMsg_VideoDecoder_GetShm::ID, PP_OK,
+        PpapiPluginMsg_VideoDecoder_GetShmReply(kShmSize));
+    sink().AddFilter(&shm_msg_handler);
+
+    if (expected_shm_msg) {
+      base::SharedMemory shm;
+      shm.CreateAnonymous(kShmSize);
+      base::SharedMemoryHandle shm_handle;
+      shm.ShareToProcess(base::GetCurrentProcessHandle(), &shm_handle);
+      SerializedHandle serialized_handle(shm_handle, kShmSize);
+      shm_msg_handler.set_serialized_handle(&serialized_handle);
+    }
+
+    memset(decode_buffer_, 0x55, kDecodeBufferSize);
+    int32_t result =
+        decoder_iface()->Decode(pp_decoder,
+                                kDecodeId,
+                                kDecodeBufferSize,
+                                decode_buffer_,
+                                PP_MakeOptionalCompletionCallback(
+                                    &MockCompletionCallback::Callback, cb));
+
+    if (expected_shm_msg) {
+      uint32_t shm_id, shm_size, expected_shm_id, expected_shm_size;
+      UnpackMessage<PpapiHostMsg_VideoDecoder_GetShm>(
+          *expected_shm_msg, &expected_shm_id, &expected_shm_size);
+      if (shm_msg_handler.last_handled_msg().type() == 0 ||
+          !UnpackMessage<PpapiHostMsg_VideoDecoder_GetShm>(
+              shm_msg_handler.last_handled_msg(), &shm_id, &shm_size) ||
+          shm_id != expected_shm_id ||
+          shm_size != expected_shm_size) {
+        // Signal that the expected shm message wasn't sent by failing.
+        result = PP_ERROR_FAILED;
+      }
+    }
+
+    sink().RemoveFilter(&shm_msg_handler);
+    return result;
+  }
+
+  int32_t CallGetPicture(PP_Resource pp_decoder,
+                         PP_VideoPicture* picture,
+                         MockCompletionCallback* cb) {
+    int32_t result =
+        decoder_iface()->GetPicture(pp_decoder,
+                                    picture,
+                                    PP_MakeOptionalCompletionCallback(
+                                        &MockCompletionCallback::Callback, cb));
+    return result;
+  }
+
+  void CallRecyclePicture(PP_Resource pp_decoder,
+                          const PP_VideoPicture& picture) {
+    decoder_iface()->RecyclePicture(pp_decoder, &picture);
+  }
+
+  int32_t CallFlush(PP_Resource pp_decoder, MockCompletionCallback* cb) {
+    int32_t result =
+        decoder_iface()->Flush(pp_decoder,
+                               PP_MakeOptionalCompletionCallback(
+                                   &MockCompletionCallback::Callback, cb));
+    return result;
+  }
+
+  int32_t CallReset(PP_Resource pp_decoder, MockCompletionCallback* cb) {
+    int32_t result =
+        decoder_iface()->Reset(pp_decoder,
+                               PP_MakeOptionalCompletionCallback(
+                                   &MockCompletionCallback::Callback, cb));
+    return result;
+  }
+
+  void SendDecodeReply(const ResourceMessageCallParams& params,
+                       uint32_t shm_id) {
+    SendReply(params, PP_OK, PpapiPluginMsg_VideoDecoder_DecodeReply(shm_id));
+  }
+
+  void SendPictureReady(const ResourceMessageCallParams& params,
+                        uint32_t decode_count,
+                        uint32_t texture_id) {
+    SendReply(
+        params,
+        PP_OK,
+        PpapiPluginMsg_VideoDecoder_PictureReady(decode_count, texture_id));
+  }
+
+  void SendFlushReply(const ResourceMessageCallParams& params) {
+    SendReply(params, PP_OK, PpapiPluginMsg_VideoDecoder_FlushReply());
+  }
+
+  void SendResetReply(const ResourceMessageCallParams& params) {
+    SendReply(params, PP_OK, PpapiPluginMsg_VideoDecoder_ResetReply());
+  }
+
+  void SendRequestTextures(const ResourceMessageCallParams& params) {
+    SendReply(params,
+              PP_OK,
+              PpapiPluginMsg_VideoDecoder_RequestTextures(
+                  kNumRequestedTextures, PP_MakeSize(320, 240), GL_TEXTURE_2D));
+  }
+
+  void SendNotifyError(const ResourceMessageCallParams& params, int32_t error) {
+    SendReply(params, PP_OK, PpapiPluginMsg_VideoDecoder_NotifyError(error));
+  }
+
+  bool CheckDecodeMsg(ResourceMessageCallParams* params,
+                      uint32_t* shm_id,
+                      uint32_t* size) {
+    IPC::Message msg;
+    if (!sink().GetFirstResourceCallMatching(
+            PpapiHostMsg_VideoDecoder_Decode::ID, params, &msg))
+      return false;
+    sink().ClearMessages();
+    return UnpackMessage<PpapiHostMsg_VideoDecoder_Decode>(msg, shm_id, size);
+  }
+
+  bool CheckRecyclePictureMsg(ResourceMessageCallParams* params,
+                              uint32_t* texture_id) {
+    IPC::Message msg;
+    if (!sink().GetFirstResourceCallMatching(
+            PpapiHostMsg_VideoDecoder_RecyclePicture::ID, params, &msg))
+      return false;
+    sink().ClearMessages();
+    return UnpackMessage<PpapiHostMsg_VideoDecoder_RecyclePicture>(msg,
+                                                                   texture_id);
+  }
+
+  bool CheckFlushMsg(ResourceMessageCallParams* params) {
+    return CheckMsg(params, PpapiHostMsg_VideoDecoder_Flush::ID);
+  }
+
+  bool CheckResetMsg(ResourceMessageCallParams* params) {
+    return CheckMsg(params, PpapiHostMsg_VideoDecoder_Reset::ID);
+  }
+
+  void ClearCallbacks(PP_Resource pp_decoder) {
+    ResourceMessageCallParams params;
+    MockCompletionCallback cb;
+
+    // Reset to abort Decode and GetPicture callbacks.
+    CallReset(pp_decoder, &cb);
+    // Initialize params so we can reply to the Reset.
+    CheckResetMsg(&params);
+    // Run the Reset callback.
+    SendResetReply(params);
+  }
+
+ private:
+  bool CheckMsg(ResourceMessageCallParams* params, int id) {
+    IPC::Message msg;
+    if (!sink().GetFirstResourceCallMatching(id, params, &msg))
+      return false;
+    sink().ClearMessages();
+    return true;
+  }
+
+  const PPB_VideoDecoder_0_1* decoder_iface_;
+
+  char decode_buffer_[kDecodeBufferSize];
+};
+
+}  // namespace
+
+TEST_F(VideoDecoderResourceTest, Initialize) {
+  // Initialize with 0 graphics3d_context should fail.
+  {
+    LockingResourceReleaser decoder(CreateDecoder());
+    MockCompletionCallback cb;
+    int32_t result = decoder_iface()->Initialize(
+        decoder.get(),
+        0 /* invalid 3d graphics */,
+        PP_VIDEOPROFILE_H264MAIN,
+        kAllowSoftwareFallback,
+        PP_MakeOptionalCompletionCallback(&MockCompletionCallback::Callback,
+                                          &cb));
+    ASSERT_EQ(PP_ERROR_BADRESOURCE, result);
+  }
+  // Initialize with bad profile value should fail.
+  {
+    LockingResourceReleaser decoder(CreateDecoder());
+    MockCompletionCallback cb;
+    int32_t result = decoder_iface()->Initialize(
+        decoder.get(),
+        1 /* non-zero resource */,
+        static_cast<PP_VideoProfile>(-1),
+        kAllowSoftwareFallback,
+        PP_MakeOptionalCompletionCallback(&MockCompletionCallback::Callback,
+                                          &cb));
+    ASSERT_EQ(PP_ERROR_BADARGUMENT, result);
+  }
+  // Initialize with valid graphics3d_context and profile should succeed.
+  {
+    LockingResourceReleaser decoder(CreateDecoder());
+    LockingResourceReleaser graphics3d(CreateGraphics3d());
+    MockCompletionCallback cb;
+    int32_t result = decoder_iface()->Initialize(
+        decoder.get(),
+        graphics3d.get(),
+        PP_VIDEOPROFILE_H264MAIN,
+        kAllowSoftwareFallback,
+        PP_MakeOptionalCompletionCallback(&MockCompletionCallback::Callback,
+                                          &cb));
+    ASSERT_EQ(PP_OK_COMPLETIONPENDING, result);
+    ASSERT_TRUE(decoder_iface()->IsVideoDecoder(decoder.get()));
+
+    // Another attempt while pending should fail.
+    result = decoder_iface()->Initialize(
+        decoder.get(),
+        graphics3d.get(),
+        PP_VIDEOPROFILE_H264MAIN,
+        kAllowSoftwareFallback,
+        PP_MakeOptionalCompletionCallback(&MockCompletionCallback::Callback,
+                                          &cb));
+    ASSERT_EQ(PP_ERROR_INPROGRESS, result);
+
+    // Check for host message and send a reply to complete initialization.
+    ResourceMessageCallParams params;
+    IPC::Message msg;
+    ASSERT_TRUE(sink().GetFirstResourceCallMatching(
+        PpapiHostMsg_VideoDecoder_Initialize::ID, &params, &msg));
+    sink().ClearMessages();
+    SendReply(params, PP_OK, PpapiPluginMsg_VideoDecoder_InitializeReply());
+    ASSERT_TRUE(cb.called());
+    ASSERT_EQ(PP_OK, cb.result());
+  }
+}
+
+TEST_F(VideoDecoderResourceTest, Uninitialized) {
+  // Operations on uninitialized decoders should fail.
+  LockingResourceReleaser decoder(CreateDecoder());
+  MockCompletionCallback uncalled_cb;
+
+  ASSERT_EQ(PP_ERROR_FAILED, CallDecode(decoder.get(), &uncalled_cb, NULL));
+  ASSERT_FALSE(uncalled_cb.called());
+
+  ASSERT_EQ(PP_ERROR_FAILED, CallGetPicture(decoder.get(), NULL, &uncalled_cb));
+  ASSERT_FALSE(uncalled_cb.called());
+
+  ASSERT_EQ(PP_ERROR_FAILED, CallFlush(decoder.get(), &uncalled_cb));
+  ASSERT_FALSE(uncalled_cb.called());
+
+  ASSERT_EQ(PP_ERROR_FAILED, CallReset(decoder.get(), &uncalled_cb));
+  ASSERT_FALSE(uncalled_cb.called());
+}
+
+TEST_F(VideoDecoderResourceTest, DecodeAndGetPicture) {
+  LockingResourceReleaser decoder(CreateAndInitializeDecoder());
+  ResourceMessageCallParams params, params2;
+  MockCompletionCallback decode_cb, get_picture_cb, uncalled_cb;
+
+  uint32_t shm_id;
+  uint32_t decode_size;
+  // Call Decode until we have the maximum pending, minus one.
+  for (uint32_t i = 0; i < kMaximumPendingDecodes - 1; i++) {
+    PpapiHostMsg_VideoDecoder_GetShm shm_msg(i, kDecodeBufferSize);
+    ASSERT_EQ(PP_OK, CallDecode(decoder.get(), &uncalled_cb, &shm_msg));
+    ASSERT_FALSE(uncalled_cb.called());
+    CheckDecodeMsg(&params, &shm_id, &decode_size);
+    ASSERT_EQ(i, shm_id);
+    ASSERT_EQ(kDecodeBufferSize, decode_size);
+  }
+  // Once we've allocated the maximum number of buffers, we must wait.
+  PpapiHostMsg_VideoDecoder_GetShm shm_msg(7U, kDecodeBufferSize);
+  ASSERT_EQ(PP_OK_COMPLETIONPENDING,
+            CallDecode(decoder.get(), &decode_cb, &shm_msg));
+  CheckDecodeMsg(&params, &shm_id, &decode_size);
+  ASSERT_EQ(7U, shm_id);
+  ASSERT_EQ(kDecodeBufferSize, decode_size);
+
+  // Calling Decode when another Decode is pending should fail.
+  ASSERT_EQ(PP_ERROR_INPROGRESS, CallDecode(decoder.get(), &uncalled_cb, NULL));
+  ASSERT_FALSE(uncalled_cb.called());
+  // Free up the first decode buffer.
+  SendDecodeReply(params, 0U);
+  // The decoder should run the pending callback.
+  ASSERT_TRUE(decode_cb.called());
+  ASSERT_EQ(PP_OK, decode_cb.result());
+  decode_cb.Reset();
+
+  // Now try to get a picture. No picture ready message has been received yet.
+  PP_VideoPicture picture;
+  ASSERT_EQ(PP_OK_COMPLETIONPENDING,
+            CallGetPicture(decoder.get(), &picture, &get_picture_cb));
+  ASSERT_FALSE(get_picture_cb.called());
+  // Calling GetPicture when another GetPicture is pending should fail.
+  ASSERT_EQ(PP_ERROR_INPROGRESS,
+            CallGetPicture(decoder.get(), &picture, &uncalled_cb));
+  ASSERT_FALSE(uncalled_cb.called());
+  // Send 'request textures' message to initialize textures.
+  SendRequestTextures(params);
+  // Send a picture ready message for Decode call 0. The GetPicture callback
+  // should complete.
+  SendPictureReady(params, 0U, kTextureId1);
+  ASSERT_TRUE(get_picture_cb.called());
+  ASSERT_EQ(PP_OK, get_picture_cb.result());
+  ASSERT_EQ(kDecodeId, picture.decode_id);
+  get_picture_cb.Reset();
+
+  // Send a picture ready message for Decode call 1. Since there is no pending
+  // GetPicture call, the picture should be queued.
+  SendPictureReady(params, 1U, kTextureId2);
+  // The next GetPicture should return synchronously.
+  ASSERT_EQ(PP_OK, CallGetPicture(decoder.get(), &picture, &uncalled_cb));
+  ASSERT_FALSE(uncalled_cb.called());
+  ASSERT_EQ(kDecodeId, picture.decode_id);
+}
+
+TEST_F(VideoDecoderResourceTest, RecyclePicture) {
+  LockingResourceReleaser decoder(CreateAndInitializeDecoder());
+  ResourceMessageCallParams params;
+  MockCompletionCallback decode_cb, get_picture_cb, uncalled_cb;
+
+  // Get to a state where we have a picture to recycle.
+  PpapiHostMsg_VideoDecoder_GetShm shm_msg(0U, kDecodeBufferSize);
+  ASSERT_EQ(PP_OK, CallDecode(decoder.get(), &decode_cb, &shm_msg));
+  uint32_t shm_id;
+  uint32_t decode_size;
+  CheckDecodeMsg(&params, &shm_id, &decode_size);
+  SendDecodeReply(params, 0U);
+  // Send 'request textures' message to initialize textures.
+  SendRequestTextures(params);
+  // Call GetPicture and send 'picture ready' message to get a picture to
+  // recycle.
+  PP_VideoPicture picture;
+  ASSERT_EQ(PP_OK_COMPLETIONPENDING,
+            CallGetPicture(decoder.get(), &picture, &get_picture_cb));
+  SendPictureReady(params, 0U, kTextureId1);
+  ASSERT_EQ(kTextureId1, picture.texture_id);
+
+  CallRecyclePicture(decoder.get(), picture);
+  uint32_t texture_id;
+  ASSERT_TRUE(CheckRecyclePictureMsg(&params, &texture_id));
+  ASSERT_EQ(kTextureId1, texture_id);
+
+  ClearCallbacks(decoder.get());
+}
+
+TEST_F(VideoDecoderResourceTest, Flush) {
+  LockingResourceReleaser decoder(CreateAndInitializeDecoder());
+  ResourceMessageCallParams params, params2;
+  MockCompletionCallback flush_cb, get_picture_cb, uncalled_cb;
+
+  ASSERT_EQ(PP_OK_COMPLETIONPENDING, CallFlush(decoder.get(), &flush_cb));
+  ASSERT_FALSE(flush_cb.called());
+  ASSERT_TRUE(CheckFlushMsg(&params));
+
+  ASSERT_EQ(PP_ERROR_FAILED, CallDecode(decoder.get(), &uncalled_cb, NULL));
+  ASSERT_FALSE(uncalled_cb.called());
+
+  // Plugin can call GetPicture while Flush is pending.
+  ASSERT_EQ(PP_OK_COMPLETIONPENDING,
+            CallGetPicture(decoder.get(), NULL, &get_picture_cb));
+  ASSERT_FALSE(get_picture_cb.called());
+
+  ASSERT_EQ(PP_ERROR_INPROGRESS, CallFlush(decoder.get(), &uncalled_cb));
+  ASSERT_FALSE(uncalled_cb.called());
+
+  ASSERT_EQ(PP_ERROR_FAILED, CallReset(decoder.get(), &uncalled_cb));
+  ASSERT_FALSE(uncalled_cb.called());
+
+  // Plugin can call RecyclePicture while Flush is pending.
+  PP_VideoPicture picture;
+  picture.texture_id = kTextureId1;
+  CallRecyclePicture(decoder.get(), picture);
+  uint32_t texture_id;
+  ASSERT_TRUE(CheckRecyclePictureMsg(&params2, &texture_id));
+
+  SendFlushReply(params);
+  // Any pending GetPicture call is aborted.
+  ASSERT_TRUE(get_picture_cb.called());
+  ASSERT_EQ(PP_ERROR_ABORTED, get_picture_cb.result());
+  ASSERT_TRUE(flush_cb.called());
+  ASSERT_EQ(PP_OK, flush_cb.result());
+}
+
+// TODO(bbudge) Test Reset when we can run the message loop to get aborted
+// callbacks to run.
+
+TEST_F(VideoDecoderResourceTest, NotifyError) {
+  LockingResourceReleaser decoder(CreateAndInitializeDecoder());
+  ResourceMessageCallParams params;
+  MockCompletionCallback decode_cb, get_picture_cb, uncalled_cb;
+
+  // Call Decode and GetPicture to have some pending requests.
+  PpapiHostMsg_VideoDecoder_GetShm shm_msg(0U, kDecodeBufferSize);
+  ASSERT_EQ(PP_OK, CallDecode(decoder.get(), &decode_cb, &shm_msg));
+  ASSERT_FALSE(decode_cb.called());
+  ASSERT_EQ(PP_OK_COMPLETIONPENDING,
+            CallGetPicture(decoder.get(), NULL, &get_picture_cb));
+  ASSERT_FALSE(get_picture_cb.called());
+
+  // Send the decoder resource an unsolicited notify error message. We first
+  // need to initialize 'params' so the message is routed to the decoder.
+  uint32_t shm_id;
+  uint32_t decode_size;
+  CheckDecodeMsg(&params, &shm_id, &decode_size);
+  SendNotifyError(params, PP_ERROR_RESOURCE_FAILED);
+
+  // Any pending message should be run with the reported error.
+  ASSERT_TRUE(get_picture_cb.called());
+  ASSERT_EQ(PP_ERROR_RESOURCE_FAILED, get_picture_cb.result());
+
+  // All further calls return the reported error.
+  ASSERT_EQ(PP_ERROR_RESOURCE_FAILED,
+            CallDecode(decoder.get(), &uncalled_cb, NULL));
+  ASSERT_FALSE(uncalled_cb.called());
+  ASSERT_EQ(PP_ERROR_RESOURCE_FAILED,
+            CallGetPicture(decoder.get(), NULL, &uncalled_cb));
+  ASSERT_FALSE(uncalled_cb.called());
+  ASSERT_EQ(PP_ERROR_RESOURCE_FAILED, CallFlush(decoder.get(), &uncalled_cb));
+  ASSERT_FALSE(uncalled_cb.called());
+  ASSERT_EQ(PP_ERROR_RESOURCE_FAILED, CallReset(decoder.get(), &uncalled_cb));
+  ASSERT_FALSE(uncalled_cb.called());
+}
+
+}  // namespace proxy
+}  // namespace ppapi