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      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/openmax/OMX_Types.h>
     20 #include <media/stagefright/MediaCodecList.h>
     21 #include <media/stagefright/MediaDefs.h>
     22 #include <media/stagefright/SimpleDecodingSource.h>
     23 
     24 
     25 namespace android {
     26 
     27 // listed in same order as VideoCodecIds[] in file "../devices.c" with ANDROID defined
     28 static const char *kVideoMimeTypes[] = {
     29         MEDIA_MIMETYPE_VIDEO_MPEG2,
     30         MEDIA_MIMETYPE_VIDEO_H263,
     31         MEDIA_MIMETYPE_VIDEO_MPEG4,
     32         MEDIA_MIMETYPE_VIDEO_AVC,
     33         MEDIA_MIMETYPE_VIDEO_VP8,
     34         MEDIA_MIMETYPE_VIDEO_VP9
     35 };
     36 // must == kMaxVideoDecoders
     37 static const size_t kNbVideoMimeTypes = sizeof(kVideoMimeTypes) / sizeof(kVideoMimeTypes[0]);
     38 
     39 // codec capabilities in the following arrays maps to the mime types defined in kVideoMimeTypes
     40 struct CodecCapabilities {
     41     Vector<MediaCodecInfo::ProfileLevel> mProfileLevels;
     42 };
     43 
     44 static CodecCapabilities VideoDecoderCapabilities[kNbVideoMimeTypes];
     45 static XAuint32 VideoDecoderNbProfLevel[kNbVideoMimeTypes];
     46 
     47 static XAuint32 NbSupportedDecoderTypes = 0;
     48 
     49 
     50 XAuint32 convertOpenMaxIlToAl(OMX_U32 ilVideoProfileOrLevel) {
     51     // For video codec profiles and levels, the number of trailing zeroes in OpenMAX IL
     52     // are equal to the matching OpenMAX AL constant value plus 1, for example:
     53     //    XA_VIDEOPROFILE_H263_BACKWARDCOMPATIBLE ((XAuint32) 0x00000003)
     54     //        matches
     55     //    OMX_VIDEO_H263ProfileBackwardCompatible  = 0x04
     56     return (XAuint32) (__builtin_ctz(ilVideoProfileOrLevel) + 1);
     57 }
     58 
     59 
     60 bool android_videoCodec_expose() {
     61     SL_LOGV("android_videoCodec_expose()");
     62 
     63     sp<IMediaCodecList> list = MediaCodecList::getInstance();
     64     if (list == NULL) {
     65         SL_LOGE("could not get MediaCodecList");
     66         return false;
     67     }
     68 
     69     // used to check whether no codecs were found, which is a sign of failure
     70     NbSupportedDecoderTypes = 0;
     71     for (size_t m = 0 ; m < kNbVideoMimeTypes ; m++) {
     72         VideoDecoderNbProfLevel[m] = 0;
     73         for (ssize_t index = 0;; ++index) {
     74             index = list->findCodecByType(
     75                     kVideoMimeTypes[m], false /* encoder */, index);
     76             if (index < 0) {
     77                 break;
     78             }
     79 
     80             sp<MediaCodecInfo> info = list->getCodecInfo(index);
     81             if (info == NULL || MediaCodecList::isSoftwareCodec(info->getCodecName())) {
     82                 continue; // HW codec only
     83             }
     84 
     85             sp<MediaCodecInfo::Capabilities> caps = info->getCapabilitiesFor(kVideoMimeTypes[m]);
     86             if (caps == NULL) {
     87                 continue; // this should not happen
     88             }
     89 
     90             // get the number of profiles and levels
     91             Vector<MediaCodecInfo::ProfileLevel> &profileLevels =
     92                 VideoDecoderCapabilities[m].mProfileLevels;
     93             caps->getSupportedProfileLevels(&profileLevels);
     94 #if 0   // Intentionally disabled example of making modifications to profile / level combinations
     95             if (VideoDecoderIds[m] == XA_VIDEOCODEC_AVC) {
     96                 // remove non-core profile / level combinations
     97                 for (size_t i = 0, size = profileLevels.size(); i < size; ) {
     98                     MediaCodecInfo::ProfileLevel profileLevel = profileLevels.itemAt(i);
     99                     if (profileLevel.mProfile == XA_VIDEOPROFILE_AVC_BASELINE) {
    100                         // either skip past this item and don't change vector size
    101                         ++i;
    102                     } else {
    103                         // or remove this item, decrement the vector size,
    104                         // and next time through the loop check a different item at same index
    105                         profileLevels.removeAt(i);
    106                         --size;
    107                     }
    108                 }
    109             }
    110 #endif
    111             if ((VideoDecoderNbProfLevel[m] = profileLevels.size()) > 0) {
    112                 NbSupportedDecoderTypes++;
    113             }
    114 
    115             // only consider first codec implementation for given decoder ID / MIME type
    116             break;
    117         }
    118     }
    119 
    120     return (NbSupportedDecoderTypes > 0);
    121 }
    122 
    123 
    124 void android_videoCodec_deinit() {
    125     SL_LOGV("android_videoCodec_deinit()");
    126     // not needed
    127     // memset(VideoDecoderNbProfLevel, 0, sizeof(VideoDecoderNbProfLevel));
    128     // NbSupportedDecoderTypes = 0;
    129 }
    130 
    131 
    132 XAuint32 android_videoCodec_getNbDecoders() {
    133     return NbSupportedDecoderTypes;
    134 }
    135 
    136 
    137 void android_videoCodec_getDecoderIds(XAuint32 nbDecoders, XAuint32 *pDecoderIds) {
    138     XAuint32 *pIds = pDecoderIds;
    139     XAuint32 nbFound = 0;
    140     for (size_t m = 0 ; m < kNbVideoMimeTypes ; m++) {
    141         if (VideoDecoderNbProfLevel[m] > 0) {
    142             *pIds = VideoDecoderIds[m];
    143             pIds++;
    144             nbFound++;
    145         }
    146         // range check: function can be called for fewer codecs than there are
    147         if (nbFound == nbDecoders) {
    148             break;
    149         }
    150     }
    151 }
    152 
    153 
    154 SLresult android_videoCodec_getProfileLevelCombinationNb(XAuint32 decoderId, XAuint32 *pNb)
    155 {
    156     // translate a decoder ID to an index in the codec table
    157     size_t decoderIndex = 0;
    158     while (decoderIndex < kNbVideoMimeTypes) {
    159         if (decoderId == VideoDecoderIds[decoderIndex]) {
    160             *pNb = VideoDecoderNbProfLevel[decoderIndex];
    161             return XA_RESULT_SUCCESS;
    162         }
    163         decoderIndex++;
    164     }
    165 
    166     // spec doesn't allow a decoder to report zero profile/level combinations
    167     *pNb = 0;
    168     return XA_RESULT_PARAMETER_INVALID;
    169 }
    170 
    171 
    172 SLresult android_videoCodec_getProfileLevelCombination(XAuint32 decoderId, XAuint32 plIndex,
    173         XAVideoCodecDescriptor *pDescr)
    174 {
    175     // translate a decoder ID to an index in the codec table
    176     size_t decoderIndex = 0;
    177     while (decoderIndex < kNbVideoMimeTypes) {
    178         if (decoderId == VideoDecoderIds[decoderIndex]) {
    179             // We only look at the first codec implementation for a given decoder ID / MIME type.
    180             // OpenMAX AL doesn't let you expose the capabilities of multiple codec implementations.
    181             if (!(plIndex < VideoDecoderCapabilities[decoderIndex].mProfileLevels.size()))
    182             {
    183                 // asking for invalid profile/level
    184                 return XA_RESULT_PARAMETER_INVALID;
    185             }
    186             //     set the fields we know about
    187             pDescr->codecId = decoderId;
    188             pDescr->profileSetting = convertOpenMaxIlToAl(VideoDecoderCapabilities[decoderIndex].
    189                     mProfileLevels.itemAt(plIndex).mProfile);
    190             pDescr->levelSetting = convertOpenMaxIlToAl(VideoDecoderCapabilities[decoderIndex].
    191                     mProfileLevels.itemAt(plIndex).mLevel);
    192             //     initialize the fields we don't know about
    193             pDescr->maxWidth = 0;
    194             pDescr->maxHeight = 0;
    195             pDescr->maxFrameRate = 0;
    196             pDescr->maxBitRate = 0;
    197             pDescr->rateControlSupported = 0;
    198             break;
    199         }
    200         decoderIndex++;
    201     }
    202     return (decoderIndex < kNbVideoMimeTypes) ? XA_RESULT_SUCCESS : XA_RESULT_PARAMETER_INVALID;
    203 }
    204 
    205 } // namespace android
    206