| // 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. |
| |
| #ifndef CONTENT_RENDERER_PEPPER_CONTENT_DECRYPTOR_DELEGATE_H_ |
| #define CONTENT_RENDERER_PEPPER_CONTENT_DECRYPTOR_DELEGATE_H_ |
| |
| #include <queue> |
| #include <string> |
| |
| #include "base/basictypes.h" |
| #include "base/compiler_specific.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/weak_ptr.h" |
| #include "media/base/decryptor.h" |
| #include "media/base/media_keys.h" |
| #include "media/base/sample_format.h" |
| #include "ppapi/c/private/pp_content_decryptor.h" |
| #include "ppapi/c/private/ppp_content_decryptor_private.h" |
| #include "ui/gfx/size.h" |
| |
| namespace media { |
| class AudioDecoderConfig; |
| class DecoderBuffer; |
| class VideoDecoderConfig; |
| } |
| |
| namespace content { |
| |
| class PPB_Buffer_Impl; |
| |
| class ContentDecryptorDelegate { |
| public: |
| // ContentDecryptorDelegate does not take ownership of |
| // |plugin_decryption_interface|. Therefore |plugin_decryption_interface| |
| // must outlive this object. |
| ContentDecryptorDelegate( |
| PP_Instance pp_instance, |
| const PPP_ContentDecryptor_Private* plugin_decryption_interface); |
| ~ContentDecryptorDelegate(); |
| |
| void Initialize(const std::string& key_system, |
| const bool can_challenge_platform); |
| |
| void SetKeyEventCallbacks(const media::KeyAddedCB& key_added_cb, |
| const media::KeyErrorCB& key_error_cb, |
| const media::KeyMessageCB& key_message_cb); |
| |
| // Provides access to PPP_ContentDecryptor_Private. |
| bool GenerateKeyRequest(const std::string& type, |
| const uint8* init_data, |
| int init_data_length); |
| bool AddKey(const std::string& session_id, |
| const uint8* key, |
| int key_length, |
| const uint8* init_data, |
| int init_data_length); |
| bool CancelKeyRequest(const std::string& session_id); |
| bool Decrypt(media::Decryptor::StreamType stream_type, |
| const scoped_refptr<media::DecoderBuffer>& encrypted_buffer, |
| const media::Decryptor::DecryptCB& decrypt_cb); |
| bool CancelDecrypt(media::Decryptor::StreamType stream_type); |
| bool InitializeAudioDecoder( |
| const media::AudioDecoderConfig& decoder_config, |
| const media::Decryptor::DecoderInitCB& decoder_init_cb); |
| bool InitializeVideoDecoder( |
| const media::VideoDecoderConfig& decoder_config, |
| const media::Decryptor::DecoderInitCB& decoder_init_cb); |
| // TODO(tomfinegan): Add callback args for DeinitializeDecoder() and |
| // ResetDecoder() |
| bool DeinitializeDecoder(media::Decryptor::StreamType stream_type); |
| bool ResetDecoder(media::Decryptor::StreamType stream_type); |
| // Note: These methods can be used with unencrypted data. |
| bool DecryptAndDecodeAudio( |
| const scoped_refptr<media::DecoderBuffer>& encrypted_buffer, |
| const media::Decryptor::AudioDecodeCB& audio_decode_cb); |
| bool DecryptAndDecodeVideo( |
| const scoped_refptr<media::DecoderBuffer>& encrypted_buffer, |
| const media::Decryptor::VideoDecodeCB& video_decode_cb); |
| |
| // PPB_ContentDecryptor_Private dispatching methods. |
| // TODO(ddorwin): Remove this method. |
| void NeedKey(PP_Var key_system, PP_Var session_id, PP_Var init_data); |
| // TODO(ddorwin): Remove key_system_var parameter from these methods. |
| void KeyAdded(PP_Var key_system, PP_Var session_id); |
| void KeyMessage(PP_Var key_system, |
| PP_Var session_id, |
| PP_Var message, |
| PP_Var default_url); |
| void KeyError(PP_Var key_system, |
| PP_Var session_id, |
| int32_t media_error, |
| int32_t system_code); |
| void DeliverBlock(PP_Resource decrypted_block, |
| const PP_DecryptedBlockInfo* block_info); |
| void DecoderInitializeDone(PP_DecryptorStreamType decoder_type, |
| uint32_t request_id, |
| PP_Bool success); |
| void DecoderDeinitializeDone(PP_DecryptorStreamType decoder_type, |
| uint32_t request_id); |
| void DecoderResetDone(PP_DecryptorStreamType decoder_type, |
| uint32_t request_id); |
| void DeliverFrame(PP_Resource decrypted_frame, |
| const PP_DecryptedFrameInfo* frame_info); |
| void DeliverSamples(PP_Resource audio_frames, |
| const PP_DecryptedBlockInfo* block_info); |
| |
| private: |
| // Cancels the pending decrypt-and-decode callback for |stream_type|. |
| void CancelDecode(media::Decryptor::StreamType stream_type); |
| |
| // Fills |resource| with a PPB_Buffer_Impl and copies the data from |
| // |encrypted_buffer| into the buffer resource. This method reuses |
| // |audio_input_resource_| and |video_input_resource_| to reduce the latency |
| // in requesting new PPB_Buffer_Impl resources. The caller must make sure that |
| // |audio_input_resource_| or |video_input_resource_| is available before |
| // calling this method. |
| // |
| // An end of stream |encrypted_buffer| is represented as a null |resource|. |
| // |
| // Returns true upon success and false if any error happened. |
| bool MakeMediaBufferResource( |
| media::Decryptor::StreamType stream_type, |
| const scoped_refptr<media::DecoderBuffer>& encrypted_buffer, |
| scoped_refptr<PPB_Buffer_Impl>* resource); |
| |
| void FreeBuffer(uint32_t buffer_id); |
| |
| void SetBufferToFreeInTrackingInfo(PP_DecryptTrackingInfo* tracking_info); |
| |
| // Deserializes audio data stored in |audio_frames| into individual audio |
| // buffers in |frames|. Returns true upon success. |
| bool DeserializeAudioFrames(PP_Resource audio_frames, |
| size_t data_size, |
| media::Decryptor::AudioBuffers* frames); |
| |
| const PP_Instance pp_instance_; |
| const PPP_ContentDecryptor_Private* const plugin_decryption_interface_; |
| |
| // TODO(ddorwin): Remove after updating the Pepper API to not use key system. |
| std::string key_system_; |
| |
| // Callbacks for firing key events. |
| media::KeyAddedCB key_added_cb_; |
| media::KeyErrorCB key_error_cb_; |
| media::KeyMessageCB key_message_cb_; |
| |
| gfx::Size natural_size_; |
| |
| // Request ID for tracking pending content decryption callbacks. |
| // Note that zero indicates an invalid request ID. |
| // TODO(xhwang): Add completion callbacks for Reset/Stop and remove the use |
| // of request IDs. |
| uint32_t next_decryption_request_id_; |
| |
| uint32_t pending_audio_decrypt_request_id_; |
| media::Decryptor::DecryptCB pending_audio_decrypt_cb_; |
| |
| uint32_t pending_video_decrypt_request_id_; |
| media::Decryptor::DecryptCB pending_video_decrypt_cb_; |
| |
| uint32_t pending_audio_decoder_init_request_id_; |
| media::Decryptor::DecoderInitCB pending_audio_decoder_init_cb_; |
| |
| uint32_t pending_video_decoder_init_request_id_; |
| media::Decryptor::DecoderInitCB pending_video_decoder_init_cb_; |
| |
| uint32_t pending_audio_decode_request_id_; |
| media::Decryptor::AudioDecodeCB pending_audio_decode_cb_; |
| |
| uint32_t pending_video_decode_request_id_; |
| media::Decryptor::VideoDecodeCB pending_video_decode_cb_; |
| |
| // Cached audio and video input buffers. See MakeMediaBufferResource. |
| scoped_refptr<PPB_Buffer_Impl> audio_input_resource_; |
| scoped_refptr<PPB_Buffer_Impl> video_input_resource_; |
| |
| std::queue<uint32_t> free_buffers_; |
| |
| base::WeakPtrFactory<ContentDecryptorDelegate> weak_ptr_factory_; |
| base::WeakPtr<ContentDecryptorDelegate> weak_this_; |
| |
| // Keep track of audio parameters. |
| media::SampleFormat audio_sample_format_; |
| int audio_samples_per_second_; |
| int audio_channel_count_; |
| int audio_bytes_per_frame_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ContentDecryptorDelegate); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_RENDERER_PEPPER_CONTENT_DECRYPTOR_DELEGATE_H_ |