Add CDM video decoder.

webkit/media/crypto/ppapi/clear_key_cdm.cc

 // Copyright (c) 2012 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 "webkit/media/crypto/ppapi/clear_key_cdm.h"
 
 #include <vector>
 
+#include "base/at_exit.h"
+#include "base/file_path.h"
 #include "base/bind.h"
 #include "base/logging.h"
+#include "base/path_service.h"
 #include "base/time.h"
 #include "media/base/decoder_buffer.h"
+#include "media/base/media.h"
+
+#if defined(CLEAR_KEY_CDM_USE_FFMPEG_DECODER)
+#include "webkit/media/crypto/ppapi/ffmpeg_cdm_video_decoder.h"

[ddorwin, 2012/10/23 00:32:30]

I think 9, 10, 13, and 16 go in here too.

[Tom Finegan, 2012/10/23 00:54:41]

Done.

+#endif

[ddorwin, 2012/10/23 00:32:30]

Move to line 43 then put line 22 after it.

[Tom Finegan, 2012/10/23 00:54:41]

Done.

 
 static const char kClearKeyCdmVersion[] = "0.1.0.0";
 
+// TODO(tomfinegan): When COMPONENT_BUILD is not defined an AtExitManager must
+// exist before the call to InitializeFFmpegLibraries(). This should no longer
+// be required after http://crbug.com/91970 because we'll be able to get rid of
+// InitializeFFmpegLibraries().
+#if !defined COMPONENT_BUILD
+static base::AtExitManager g_at_exit_manager;
+#endif
+
+// TODO(tomfinegan): InitializeFFmpegLibraries() and |g_cdm_module_initialized|
+// are required for running in the sandbox, and should no longer be required
+// after http://crbug.com/91970 is fixed.
+static bool InitializeFFmpegLibraries() {
+  FilePath file_path;
+  CHECK(PathService::Get(base::DIR_EXE, &file_path));
+  CHECK(media::InitializeMediaLibrary(file_path));
+  return true;
+}
+
+static bool g_cdm_module_initialized = InitializeFFmpegLibraries();
+
 static scoped_refptr<media::DecoderBuffer> CopyDecoderBufferFrom(
     const cdm::InputBuffer& input_buffer) {
   DCHECK(input_buffer.data);
   // TODO(tomfinegan): Get rid of this copy.
   scoped_refptr<media::DecoderBuffer> output_buffer =
       media::DecoderBuffer::CopyFrom(input_buffer.data, input_buffer.data_size);
 
   std::vector<media::SubsampleEntry> subsamples;
   for (int32_t i = 0; i < input_buffer.num_subsamples; ++i) {
     media::SubsampleEntry subsample;
@@ skipping 32 matching lines @@
 template<typename Type>
 static Type* AllocateAndCopy(const Type* data, int size) {
   COMPILE_ASSERT(sizeof(Type) == 1, type_size_is_not_one);
   Type* copy = new Type[size];
   memcpy(copy, data, size);
   return copy;
 }
 
 cdm::ContentDecryptionModule* CreateCdmInstance(
     cdm::Allocator* allocator, cdm::CdmHost* host) {
+  DVLOG(1) << "CreateCdmInstance()";
   return new webkit_media::ClearKeyCdm(allocator, host);
 }
 
 void DestroyCdmInstance(cdm::ContentDecryptionModule* instance) {
+  DVLOG(1) << "DestroyCdmInstance()";
   delete instance;
 }
 
 const char* GetCdmVersion() {
   return kClearKeyCdmVersion;
 }
 
 namespace webkit_media {
 
 ClearKeyCdm::Client::Client() : status_(kKeyError), key_message_length_(0) {}
@@ skipping 155 matching lines @@
 }
 
 cdm::Status ClearKeyCdm::InitializeAudioDecoder(
     const cdm::AudioDecoderConfig& audio_decoder_config) {
   NOTIMPLEMENTED();
   return cdm::kSessionError;
 }
 
 cdm::Status ClearKeyCdm::InitializeVideoDecoder(
     const cdm::VideoDecoderConfig& video_decoder_config) {
-#if !defined(CLEAR_KEY_CDM_USE_FAKE_VIDEO_DECODER)
+#if defined(CLEAR_KEY_CDM_USE_FFMPEG_DECODER)
+  if (!video_decoder_)
+    video_decoder_.reset(new webkit_media::FFmpegCdmVideoDecoder(allocator_));
+
+  if (!video_decoder_->Initialize(video_decoder_config))
+    return cdm::kSessionError;
+
+  return cdm::kSuccess;
+#elif defined(CLEAR_KEY_CDM_USE_FAKE_VIDEO_DECODER)

[ddorwin, 2012/10/23 00:32:30]

This code will never get hit on FFmpeg platforms.

Either each of these needs to check both FAKE and FFMPEG or you need to undefine
FFMPEG in the .h file below where FAKE can be uncommented.

[Tom Finegan, 2012/10/23 00:54:41]

Added ifdef in clear_key_cdm.h that undefs USE_FFMPEG_DECODER.

+  video_size_ = video_decoder_config.coded_size;
+  return cdm::kSuccess;
+#else
   NOTIMPLEMENTED();
   return cdm::kSessionError;
-#else
-  video_size_ = video_decoder_config.coded_size;
-  return cdm::kSuccess;
-#endif  // CLEAR_KEY_CDM_USE_FAKE_VIDEO_DECODER
+#endif  // CLEAR_KEY_CDM_USE_FFMPEG_DECODER
+
 }
 
-void ClearKeyCdm::ResetDecoder(cdm::StreamType) {
-  NOTIMPLEMENTED();
+void ClearKeyCdm::ResetDecoder(cdm::StreamType decoder_type) {
+#if defined(CLEAR_KEY_CDM_USE_FFMPEG_DECODER)
+  DCHECK(decoder_type == cdm::kStreamTypeVideo);
+  video_decoder_->Reset();
+#endif
 }
 
-void ClearKeyCdm::DeinitializeDecoder(cdm::StreamType) {
-  NOTIMPLEMENTED();
+void ClearKeyCdm::DeinitializeDecoder(cdm::StreamType decoder_type) {
+#if defined(CLEAR_KEY_CDM_USE_FFMPEG_DECODER)
+  DCHECK(decoder_type == cdm::kStreamTypeVideo);
+  video_decoder_->Deinitialize();
+#endif
 }
 
 cdm::Status ClearKeyCdm::DecryptAndDecodeFrame(
     const cdm::InputBuffer& encrypted_buffer,
-    cdm::VideoFrame* video_frame) {
+    cdm::VideoFrame* decoded_frame) {
   if (!encrypted_buffer.data) {
-    video_frame->set_format(cdm::kEmptyVideoFrame);
+    decoded_frame->set_format(cdm::kEmptyVideoFrame);
     return cdm::kSuccess;
   }
 
   scoped_refptr<media::DecoderBuffer> decoder_buffer =
       CopyDecoderBufferFrom(encrypted_buffer);
 
   // Callback is called synchronously, so we can use variables on the stack.
   media::Decryptor::Status status;
   scoped_refptr<media::DecoderBuffer> buffer;
   decryptor_.Decrypt(media::Decryptor::kVideo,
                      decoder_buffer,
                      base::Bind(&CopyDecryptResults, &status, &buffer));
 
   if (status == media::Decryptor::kError)
     return cdm::kDecryptError;
 
   if (status == media::Decryptor::kNoKey)
     return cdm::kNoKey;
 
-#if !defined(CLEAR_KEY_CDM_USE_FAKE_VIDEO_DECODER)
+#if defined(CLEAR_KEY_CDM_USE_FFMPEG_DECODER)
+  DCHECK(status == media::Decryptor::kSuccess);
+  DCHECK(buffer);
+  return video_decoder_->DecodeFrame(buffer.get()->GetData(),
+                                     buffer->GetDataSize(),
+                                     encrypted_buffer.timestamp,
+                                     decoded_frame);
+#elif defined(CLEAR_KEY_CDM_USE_FAKE_VIDEO_DECODER)
+  GenerateFakeVideoFrame(decoder_buffer->GetTimestamp(), decoded_frame);
+  return cdm::kSuccess;
+#else
   NOTIMPLEMENTED();
   return cdm::kDecodeError;
-#else
-  GenerateFakeVideoFrame(decoder_buffer->GetTimestamp(), video_frame);
-  return cdm::kSuccess;
-#endif  // CLEAR_KEY_CDM_USE_FAKE_VIDEO_DECODER
+#endif  // CLEAR_KEY_CDM_USE_FFMPEG_DECODER
 }
 
 #if defined(CLEAR_KEY_CDM_USE_FAKE_VIDEO_DECODER)
 void ClearKeyCdm::GenerateFakeVideoFrame(base::TimeDelta timestamp,
                                          cdm::VideoFrame* video_frame) {
   // Choose non-zero alignment and padding on purpose for testing.
   const int kAlignment = 8;
   const int kPadding = 16;
   const int kPlanePadding = 128;
 
@@ skipping 32 matching lines @@
 #endif  // CLEAR_KEY_CDM_USE_FAKE_VIDEO_DECODER
 
 cdm::Status ClearKeyCdm::DecryptAndDecodeSamples(
     const cdm::InputBuffer& encrypted_buffer,
     cdm::Buffer* sample_buffer) {
   NOTIMPLEMENTED();
   return cdm::kDecryptError;
 }
 
 }  // namespace webkit_media