1 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 * Use of this source code is governed by a BSD-style license that can be
3 * found in the LICENSE file.
7 * This file defines the <code>PPP_ContentDecryptor_Private</code>
8 * interface. Note: This is a special interface, only to be used for Content
9 * Decryption Modules, not normal plugins.
16 * <code>PPP_ContentDecryptor_Private</code> structure contains the function
17 * pointers the decryption plugin must implement to provide services needed by
18 * the browser. This interface provides the plugin side support for the Content
19 * Decryption Module (CDM) for v0.1 of the proposed Encrypted Media Extensions:
22 interface PPP_ContentDecryptor_Private {
24 * Initialize for the specified key system.
26 * @param[in] key_system A <code>PP_Var</code> of type
27 * <code>PP_VARTYPE_STRING</code> containing the name of the key system.
29 * @param[in] can_challenge_platform A <code>PP_Bool</code> that
30 * indicates if the underlying host platform can be challenged;
31 * i.e., verified as a trusted platform.
34 [in] PP_Instance instance,
35 [in] PP_Var key_system,
36 [in] PP_Bool can_challenge_platform);
39 * Generates a key request. key_system specifies the key or licensing system
40 * to use. type contains the MIME type of init_data. init_data is a data
41 * buffer containing data for use in generating the request.
43 * Note: <code>GenerateKeyRequest()</code> must create the session ID used in
44 * other methods on this interface. The session ID must be provided to the
45 * browser by the CDM via <code>KeyMessage()</code> on the
46 * <code>PPB_ContentDecryptor_Private</code> interface.
48 * @param[in] type A <code>PP_Var</code> of type
49 * <code>PP_VARTYPE_STRING</code> containing the MIME type for init_data.
51 * @param[in] init_data A <code>PP_Var</code> of type
52 * <code>PP_VARTYPE_ARRAYBUFFER</code> containing container specific
53 * initialization data.
55 void GenerateKeyRequest(
56 [in] PP_Instance instance,
58 [in] PP_Var init_data);
61 * Provides a key or license to the decryptor for decrypting media data.
63 * When the CDM needs more information to complete addition of the key it
64 * will call <code>KeyMessage()</code> on the
65 * <code>PPB_ContentDecryptor_Private</code> interface, which the browser
66 * passes to the application. When the key is ready to use, the CDM
67 * must call call <code>KeyAdded()</code> on the
68 * <code>PPB_ContentDecryptor_Private</code> interface, and the browser
69 * must notify the web application.
71 * @param[in] session_id A <code>PP_Var</code> of type
72 * <code>PP_VARTYPE_STRING</code> containing the session ID.
74 * @param[in] key A <code>PP_Var</code> of type
75 * <code>PP_VARTYPE_ARRAYBUFFER</code> containing the decryption key, license,
76 * or other message for the given session ID.
78 * @param[in] init_data A <code>PP_Var</code> of type
79 * <code>PP_VARTYPE_ARRAYBUFFER</code> containing container specific
80 * initialization data.
83 [in] PP_Instance instance,
84 [in] PP_Var session_id,
86 [in] PP_Var init_data);
89 * Cancels a pending key request for the specified session ID.
91 * @param[in] session_id A <code>PP_Var</code> of type
92 * <code>PP_VARTYPE_STRING</code> containing the session ID.
94 void CancelKeyRequest(
95 [in] PP_Instance instance,
96 [in] PP_Var session_id);
99 * Decrypts the block and returns the unencrypted block via
100 * <code>DeliverBlock()</code> on the
101 * <code>PPB_ContentDecryptor_Private</code> interface. The returned block
102 * contains encoded data.
104 * @param[in] resource A <code>PP_Resource</code> corresponding to a
105 * <code>PPB_Buffer_Dev</code> resource that contains an encrypted data
108 * @param[in] encrypted_block_info A <code>PP_EncryptedBlockInfo</code> that
109 * contains all auxiliary information needed for decryption of the
110 * <code>encrypted_block</code>.
113 [in] PP_Instance instance,
114 [in] PP_Resource encrypted_block,
115 [in] PP_EncryptedBlockInfo encrypted_block_info);
118 * Initializes the audio decoder using codec and settings in
119 * <code>decoder_config</code>, and returns the result of the initialization
120 * request to the browser using the <code>DecoderInitializeDone()</code> method
121 * on the <code>PPB_ContentDecryptor_Private</code> interface.
123 * @param[in] decoder_config A <code>PP_AudioDecoderConfig</code> that
124 * contains audio decoder settings and a request ID. The request ID is passed
125 * to the <code>DecoderInitializeDone()</code> method on the
126 * <code>PPB_ContentDecryptor_Private</code> interface to allow clients to
127 * associate the result with a audio decoder initialization request.
129 * @param[in] codec_extra_data A <code>PP_Resource</code> corresponding to a
130 * <code>PPB_Buffer_Dev</code> resource containing codec setup data required
131 * by some codecs. It should be set to 0 when the codec being initialized
132 * does not require it.
134 void InitializeAudioDecoder(
135 [in] PP_Instance instance,
136 [in] PP_AudioDecoderConfig decoder_config,
137 [in] PP_Resource codec_extra_data);
140 * Initializes the video decoder using codec and settings in
141 * <code>decoder_config</code>, and returns the result of the initialization
142 * request to the browser using the <code>DecoderInitializeDone()</code>
143 * method on the <code>PPB_ContentDecryptor_Private</code> interface.
145 * @param[in] decoder_config A <code>PP_VideoDecoderConfig</code> that
146 * contains video decoder settings and a request ID. The request ID is passed
147 * to the <code>DecoderInitializeDone()</code> method on the
148 * <code>PPB_ContentDecryptor_Private</code> interface to allow clients to
149 * associate the result with a video decoder initialization request.
151 * @param[in] codec_extra_data A <code>PP_Resource</code> corresponding to a
152 * <code>PPB_Buffer_Dev</code> resource containing codec setup data required
153 * by some codecs. It should be set to 0 when the codec being initialized
154 * does not require it.
156 void InitializeVideoDecoder(
157 [in] PP_Instance instance,
158 [in] PP_VideoDecoderConfig decoder_config,
159 [in] PP_Resource codec_extra_data);
162 * De-initializes the decoder for the <code>PP_DecryptorStreamType</code>
163 * specified by <code>decoder_type</code> and sets it to an uninitialized
164 * state. The decoder can be re-initialized after de-initialization completes
165 * by calling <code>InitializeAudioDecoder</code> or
166 * <code>InitializeVideoDecoder</code>.
168 * De-initialization completion is reported to the browser using the
169 * <code>DecoderDeinitializeDone()</code> method on the
170 * <code>PPB_ContentDecryptor_Private</code> interface.
172 * @param[in] decoder_type A <code>PP_DecryptorStreamType</code> that
173 * specifies the decoder to de-initialize.
175 * @param[in] request_id A request ID that allows the browser to associate a
176 * request to de-initialize a decoder with the corresponding call to the
177 * <code>DecoderDeinitializeDone()</code> method on the
178 * <code>PPB_ContentDecryptor_Private</code> interface.
180 void DeinitializeDecoder(
181 [in] PP_Instance instance,
182 [in] PP_DecryptorStreamType decoder_type,
183 [in] uint32_t request_id);
186 * Resets the decoder for the <code>PP_DecryptorStreamType</code> specified
187 * by <code>decoder_type</code> to an initialized clean state. Reset
188 * completion is reported to the browser using the
189 * <code>DecoderResetDone()</code> method on the
190 * <code>PPB_ContentDecryptor_Private</code> interface. This method can be
191 * used to signal a discontinuity in the encoded data stream, and is safe to
192 * call multiple times.
194 * @param[in] decoder_type A <code>PP_DecryptorStreamType</code> that
195 * specifies the decoder to reset.
197 * @param[in] request_id A request ID that allows the browser to associate a
198 * request to reset the decoder with a corresponding call to the
199 * <code>DecoderResetDone()</code> method on the
200 * <code>PPB_ContentDecryptor_Private</code> interface.
203 [in] PP_Instance instance,
204 [in] PP_DecryptorStreamType decoder_type,
205 [in] uint32_t request_id);
208 * Decrypts encrypted_buffer, decodes it, and returns the unencrypted
209 * uncompressed (decoded) data to the browser via the
210 * <code>DeliverFrame()</code> or <code>DeliverSamples()</code> method on the
211 * <code>PPB_ContentDecryptor_Private</code> interface.
213 * @param[in] decoder_type A <code>PP_DecryptorStreamType</code> that
214 * specifies the decoder to use after <code>encrypted_buffer</code> is
217 * @param[in] encrypted_buffer A <code>PP_Resource</code> corresponding to a
218 * <code>PPB_Buffer_Dev</code> resource that contains encrypted media data.
220 * @param[in] encrypted_block_info A <code>PP_EncryptedBlockInfo</code> that
221 * contains all auxiliary information needed for decryption of the
222 * <code>encrypted_block</code>.
224 void DecryptAndDecode(
225 [in] PP_Instance instance,
226 [in] PP_DecryptorStreamType decoder_type,
227 [in] PP_Resource encrypted_buffer,
228 [in] PP_EncryptedBlockInfo encrypted_block_info);