Chung-Cheng Lou | 9bf5942 | 2012-03-02 15:53:23 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #include "video_engine/vie_encryption_impl.h" |
| 12 | |
| 13 | #include "system_wrappers/interface/trace.h" |
| 14 | #include "video_engine/include/vie_errors.h" |
| 15 | #include "video_engine/vie_channel.h" |
| 16 | #include "video_engine/vie_channel_manager.h" |
| 17 | #include "video_engine/vie_defines.h" |
| 18 | #include "video_engine/vie_impl.h" |
| 19 | |
| 20 | namespace webrtc { |
| 21 | |
| 22 | ViEEncryption* ViEEncryption::GetInterface(VideoEngine* video_engine) { |
| 23 | #ifdef WEBRTC_VIDEO_ENGINE_ENCRYPTION_API |
| 24 | if (video_engine == NULL) { |
| 25 | return NULL; |
| 26 | } |
| 27 | VideoEngineImpl* vie_impl = reinterpret_cast<VideoEngineImpl*>(video_engine); |
| 28 | ViEEncryptionImpl* vie_encryption_impl = vie_impl; |
| 29 | // Increase ref count. |
| 30 | (*vie_encryption_impl)++; |
| 31 | return vie_encryption_impl; |
| 32 | #else |
| 33 | return NULL; |
| 34 | #endif |
| 35 | } |
| 36 | |
| 37 | int ViEEncryptionImpl::Release() { |
| 38 | WEBRTC_TRACE(kTraceApiCall, kTraceVideo, instance_id_, |
| 39 | "ViEEncryptionImpl::Release()"); |
| 40 | // Decrease ref count. |
| 41 | (*this)--; |
| 42 | |
| 43 | WebRtc_Word32 ref_count = GetCount(); |
| 44 | if (ref_count < 0) { |
| 45 | WEBRTC_TRACE(kTraceWarning, kTraceVideo, instance_id_, |
| 46 | "ViEEncryptionImpl release too many times"); |
| 47 | SetLastError(kViEAPIDoesNotExist); |
| 48 | return -1; |
| 49 | } |
| 50 | WEBRTC_TRACE(kTraceInfo, kTraceVideo, instance_id_, |
| 51 | "ViEEncryptionImpl reference count: %d", ref_count); |
| 52 | return ref_count; |
| 53 | } |
| 54 | |
| 55 | ViEEncryptionImpl::ViEEncryptionImpl() { |
| 56 | WEBRTC_TRACE(kTraceMemory, kTraceVideo, instance_id_, |
| 57 | "ViEEncryptionImpl::ViEEncryptionImpl() Ctor"); |
| 58 | } |
| 59 | |
| 60 | ViEEncryptionImpl::~ViEEncryptionImpl() { |
| 61 | WEBRTC_TRACE(kTraceMemory, kTraceVideo, instance_id_, |
| 62 | "ViEEncryptionImpl::~ViEEncryptionImpl() Dtor"); |
| 63 | } |
| 64 | |
| 65 | int ViEEncryptionImpl::RegisterExternalEncryption(const int video_channel, |
| 66 | Encryption& encryption) { |
| 67 | WEBRTC_TRACE(kTraceApiCall, kTraceVideo, ViEId(instance_id_, video_channel), |
| 68 | "RegisterExternalEncryption(video_channel=%d)", video_channel); |
| 69 | |
| 70 | ViEChannelManagerScoped cs(channel_manager_); |
| 71 | ViEChannel* vie_channel = cs.Channel(video_channel); |
| 72 | if (vie_channel == NULL) { |
| 73 | WEBRTC_TRACE(kTraceError, kTraceVideo, |
| 74 | ViEId(instance_id_, video_channel), "%s: No channel %d", |
| 75 | __FUNCTION__, video_channel); |
| 76 | SetLastError(kViEEncryptionInvalidChannelId); |
| 77 | return -1; |
| 78 | } |
| 79 | if (vie_channel->RegisterExternalEncryption(&encryption) != 0) { |
| 80 | SetLastError(kViEEncryptionUnknownError); |
| 81 | return -1; |
| 82 | } |
| 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | int ViEEncryptionImpl::DeregisterExternalEncryption(const int video_channel) { |
| 87 | WEBRTC_TRACE(kTraceApiCall, kTraceVideo, ViEId(instance_id_, video_channel), |
| 88 | "RegisterExternalEncryption(video_channel=%d)", video_channel); |
| 89 | |
| 90 | ViEChannelManagerScoped cs(channel_manager_); |
| 91 | ViEChannel* vie_channel = cs.Channel(video_channel); |
| 92 | if (vie_channel == NULL) { |
| 93 | WEBRTC_TRACE(kTraceError, kTraceVideo, ViEId(instance_id_, video_channel), |
| 94 | "%s: No channel %d", __FUNCTION__, video_channel); |
| 95 | SetLastError(kViEEncryptionInvalidChannelId); |
| 96 | return -1; |
| 97 | } |
| 98 | |
| 99 | if (vie_channel->DeRegisterExternalEncryption() != 0) { |
| 100 | SetLastError(kViEEncryptionUnknownError); |
| 101 | return -1; |
| 102 | } |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | } // namespace webrtc |