1 /*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "sles_allinclusive.h"
18
19 #include <media/stagefright/MediaCodecList.h>
20 #include <media/stagefright/MediaDefs.h>
21 #include <media/stagefright/SimpleDecodingSource.h>
22
23
24 namespace android {
25
26 // listed in same order as VideoCodecIds[] in file "../devices.c" with ANDROID defined
27 static const char *kVideoMimeTypes[] = {
28 MEDIA_MIMETYPE_VIDEO_MPEG2,
29 MEDIA_MIMETYPE_VIDEO_H263,
30 MEDIA_MIMETYPE_VIDEO_MPEG4,
31 MEDIA_MIMETYPE_VIDEO_AVC,
32 MEDIA_MIMETYPE_VIDEO_VP8,
33 MEDIA_MIMETYPE_VIDEO_VP9
34 };
35 // must == kMaxVideoDecoders
36 static const size_t kNbVideoMimeTypes = sizeof(kVideoMimeTypes) / sizeof(kVideoMimeTypes[0]);
37
38 // codec capabilities in the following arrays maps to the mime types defined in kVideoMimeTypes
39 struct CodecCapabilities {
40 Vector<MediaCodecInfo::ProfileLevel> mProfileLevels;
41 };
42
43 static CodecCapabilities VideoDecoderCapabilities[kNbVideoMimeTypes];
44 static XAuint32 VideoDecoderNbProfLevel[kNbVideoMimeTypes];
45
46 static XAuint32 NbSupportedDecoderTypes = 0;
47
48
convertOpenMaxIlToAl(OMX_U32 ilVideoProfileOrLevel)49 XAuint32 convertOpenMaxIlToAl(OMX_U32 ilVideoProfileOrLevel) {
50 // For video codec profiles and levels, the number of trailing zeroes in OpenMAX IL
51 // are equal to the matching OpenMAX AL constant value plus 1, for example:
52 // XA_VIDEOPROFILE_H263_BACKWARDCOMPATIBLE ((XAuint32) 0x00000003)
53 // matches
54 // OMX_VIDEO_H263ProfileBackwardCompatible = 0x04
55 return (XAuint32) (__builtin_ctz(ilVideoProfileOrLevel) + 1);
56 }
57
58
android_videoCodec_expose()59 bool android_videoCodec_expose() {
60 SL_LOGV("android_videoCodec_expose()");
61
62 sp<IMediaCodecList> list = MediaCodecList::getInstance();
63 if (list == NULL) {
64 SL_LOGE("could not get MediaCodecList");
65 return false;
66 }
67
68 // used to check whether no codecs were found, which is a sign of failure
69 NbSupportedDecoderTypes = 0;
70 for (size_t m = 0 ; m < kNbVideoMimeTypes ; m++) {
71 VideoDecoderNbProfLevel[m] = 0;
72 for (ssize_t index = 0;; ++index) {
73 index = list->findCodecByType(
74 kVideoMimeTypes[m], false /* encoder */, index);
75 if (index < 0) {
76 break;
77 }
78
79 sp<MediaCodecInfo> info = list->getCodecInfo(index);
80 if (info == NULL || MediaCodecList::isSoftwareCodec(info->getCodecName())) {
81 continue; // HW codec only
82 }
83
84 sp<MediaCodecInfo::Capabilities> caps = info->getCapabilitiesFor(kVideoMimeTypes[m]);
85 if (caps == NULL) {
86 continue; // this should not happen
87 }
88
89 // get the number of profiles and levels
90 Vector<MediaCodecInfo::ProfileLevel> &profileLevels =
91 VideoDecoderCapabilities[m].mProfileLevels;
92 caps->getSupportedProfileLevels(&profileLevels);
93 #if 0 // Intentionally disabled example of making modifications to profile / level combinations
94 if (VideoDecoderIds[m] == XA_VIDEOCODEC_AVC) {
95 // remove non-core profile / level combinations
96 for (size_t i = 0, size = profileLevels.size(); i < size; ) {
97 MediaCodecInfo::ProfileLevel profileLevel = profileLevels.itemAt(i);
98 if (profileLevel.mProfile == XA_VIDEOPROFILE_AVC_BASELINE) {
99 // either skip past this item and don't change vector size
100 ++i;
101 } else {
102 // or remove this item, decrement the vector size,
103 // and next time through the loop check a different item at same index
104 profileLevels.removeAt(i);
105 --size;
106 }
107 }
108 }
109 #endif
110 if ((VideoDecoderNbProfLevel[m] = profileLevels.size()) > 0) {
111 NbSupportedDecoderTypes++;
112 }
113
114 // only consider first codec implementation for given decoder ID / MIME type
115 break;
116 }
117 }
118
119 return (NbSupportedDecoderTypes > 0);
120 }
121
122
android_videoCodec_deinit()123 void android_videoCodec_deinit() {
124 SL_LOGV("android_videoCodec_deinit()");
125 // not needed
126 // memset(VideoDecoderNbProfLevel, 0, sizeof(VideoDecoderNbProfLevel));
127 // NbSupportedDecoderTypes = 0;
128 }
129
130
android_videoCodec_getNbDecoders()131 XAuint32 android_videoCodec_getNbDecoders() {
132 return NbSupportedDecoderTypes;
133 }
134
135
android_videoCodec_getDecoderIds(XAuint32 nbDecoders,XAuint32 * pDecoderIds)136 void android_videoCodec_getDecoderIds(XAuint32 nbDecoders, XAuint32 *pDecoderIds) {
137 XAuint32 *pIds = pDecoderIds;
138 XAuint32 nbFound = 0;
139 for (size_t m = 0 ; m < kNbVideoMimeTypes ; m++) {
140 if (VideoDecoderNbProfLevel[m] > 0) {
141 *pIds = VideoDecoderIds[m];
142 pIds++;
143 nbFound++;
144 }
145 // range check: function can be called for fewer codecs than there are
146 if (nbFound == nbDecoders) {
147 break;
148 }
149 }
150 }
151
152
android_videoCodec_getProfileLevelCombinationNb(XAuint32 decoderId,XAuint32 * pNb)153 SLresult android_videoCodec_getProfileLevelCombinationNb(XAuint32 decoderId, XAuint32 *pNb)
154 {
155 // translate a decoder ID to an index in the codec table
156 size_t decoderIndex = 0;
157 while (decoderIndex < kNbVideoMimeTypes) {
158 if (decoderId == VideoDecoderIds[decoderIndex]) {
159 *pNb = VideoDecoderNbProfLevel[decoderIndex];
160 return XA_RESULT_SUCCESS;
161 }
162 decoderIndex++;
163 }
164
165 // spec doesn't allow a decoder to report zero profile/level combinations
166 *pNb = 0;
167 return XA_RESULT_PARAMETER_INVALID;
168 }
169
170
android_videoCodec_getProfileLevelCombination(XAuint32 decoderId,XAuint32 plIndex,XAVideoCodecDescriptor * pDescr)171 SLresult android_videoCodec_getProfileLevelCombination(XAuint32 decoderId, XAuint32 plIndex,
172 XAVideoCodecDescriptor *pDescr)
173 {
174 // translate a decoder ID to an index in the codec table
175 size_t decoderIndex = 0;
176 while (decoderIndex < kNbVideoMimeTypes) {
177 if (decoderId == VideoDecoderIds[decoderIndex]) {
178 // We only look at the first codec implementation for a given decoder ID / MIME type.
179 // OpenMAX AL doesn't let you expose the capabilities of multiple codec implementations.
180 if (!(plIndex < VideoDecoderCapabilities[decoderIndex].mProfileLevels.size()))
181 {
182 // asking for invalid profile/level
183 return XA_RESULT_PARAMETER_INVALID;
184 }
185 // set the fields we know about
186 pDescr->codecId = decoderId;
187 pDescr->profileSetting = convertOpenMaxIlToAl(VideoDecoderCapabilities[decoderIndex].
188 mProfileLevels.itemAt(plIndex).mProfile);
189 pDescr->levelSetting = convertOpenMaxIlToAl(VideoDecoderCapabilities[decoderIndex].
190 mProfileLevels.itemAt(plIndex).mLevel);
191 // initialize the fields we don't know about
192 pDescr->maxWidth = 0;
193 pDescr->maxHeight = 0;
194 pDescr->maxFrameRate = 0;
195 pDescr->maxBitRate = 0;
196 pDescr->rateControlSupported = 0;
197 break;
198 }
199 decoderIndex++;
200 }
201 return (decoderIndex < kNbVideoMimeTypes) ? XA_RESULT_SUCCESS : XA_RESULT_PARAMETER_INVALID;
202 }
203
204 } // namespace android
205