TimedText3GPPSource.cpp revision f1d5aa162c02a16b7195a43a9bcea4d592600ac4
16655174826330afe66ef766258181ae8c11f3f6cInsun Kang /* 26655174826330afe66ef766258181ae8c11f3f6cInsun Kang * Copyright (C) 2012 The Android Open Source Project 36655174826330afe66ef766258181ae8c11f3f6cInsun Kang * 46655174826330afe66ef766258181ae8c11f3f6cInsun Kang * Licensed under the Apache License, Version 2.0 (the "License"); 56655174826330afe66ef766258181ae8c11f3f6cInsun Kang * you may not use this file except in compliance with the License. 66655174826330afe66ef766258181ae8c11f3f6cInsun Kang * You may obtain a copy of the License at 76655174826330afe66ef766258181ae8c11f3f6cInsun Kang * 86655174826330afe66ef766258181ae8c11f3f6cInsun Kang * http://www.apache.org/licenses/LICENSE-2.0 96655174826330afe66ef766258181ae8c11f3f6cInsun Kang * 106655174826330afe66ef766258181ae8c11f3f6cInsun Kang * Unless required by applicable law or agreed to in writing, software 116655174826330afe66ef766258181ae8c11f3f6cInsun Kang * distributed under the License is distributed on an "AS IS" BASIS, 126655174826330afe66ef766258181ae8c11f3f6cInsun Kang * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 136655174826330afe66ef766258181ae8c11f3f6cInsun Kang * See the License for the specific language governing permissions and 146655174826330afe66ef766258181ae8c11f3f6cInsun Kang * limitations under the License. 156655174826330afe66ef766258181ae8c11f3f6cInsun Kang */ 166655174826330afe66ef766258181ae8c11f3f6cInsun Kang 176655174826330afe66ef766258181ae8c11f3f6cInsun Kang//#define LOG_NDEBUG 0 186655174826330afe66ef766258181ae8c11f3f6cInsun Kang#define LOG_TAG "TimedTextInBandSource" 196655174826330afe66ef766258181ae8c11f3f6cInsun Kang#include <utils/Log.h> 206655174826330afe66ef766258181ae8c11f3f6cInsun Kang 216655174826330afe66ef766258181ae8c11f3f6cInsun Kang#include <binder/Parcel.h> 22f1d5aa162c02a16b7195a43a9bcea4d592600ac4James Dong#include <media/stagefright/foundation/ADebug.h> // CHECK_XX macro 236655174826330afe66ef766258181ae8c11f3f6cInsun Kang#include <media/stagefright/MediaBuffer.h> 246655174826330afe66ef766258181ae8c11f3f6cInsun Kang#include <media/stagefright/MediaDefs.h> // for MEDIA_MIMETYPE_xxx 256655174826330afe66ef766258181ae8c11f3f6cInsun Kang#include <media/stagefright/MediaErrors.h> 266655174826330afe66ef766258181ae8c11f3f6cInsun Kang#include <media/stagefright/MediaSource.h> 276655174826330afe66ef766258181ae8c11f3f6cInsun Kang#include <media/stagefright/MetaData.h> 286655174826330afe66ef766258181ae8c11f3f6cInsun Kang 296655174826330afe66ef766258181ae8c11f3f6cInsun Kang#include "TimedTextInBandSource.h" 306655174826330afe66ef766258181ae8c11f3f6cInsun Kang#include "TextDescriptions.h" 316655174826330afe66ef766258181ae8c11f3f6cInsun Kang 326655174826330afe66ef766258181ae8c11f3f6cInsun Kangnamespace android { 336655174826330afe66ef766258181ae8c11f3f6cInsun Kang 346655174826330afe66ef766258181ae8c11f3f6cInsun KangTimedTextInBandSource::TimedTextInBandSource(const sp<MediaSource>& mediaSource) 356655174826330afe66ef766258181ae8c11f3f6cInsun Kang : mSource(mediaSource) { 366655174826330afe66ef766258181ae8c11f3f6cInsun Kang} 376655174826330afe66ef766258181ae8c11f3f6cInsun Kang 386655174826330afe66ef766258181ae8c11f3f6cInsun KangTimedTextInBandSource::~TimedTextInBandSource() { 396655174826330afe66ef766258181ae8c11f3f6cInsun Kang} 406655174826330afe66ef766258181ae8c11f3f6cInsun Kang 416655174826330afe66ef766258181ae8c11f3f6cInsun Kangstatus_t TimedTextInBandSource::read( 426655174826330afe66ef766258181ae8c11f3f6cInsun Kang int64_t *timeUs, Parcel *parcel, const MediaSource::ReadOptions *options) { 436655174826330afe66ef766258181ae8c11f3f6cInsun Kang MediaBuffer *textBuffer = NULL; 446655174826330afe66ef766258181ae8c11f3f6cInsun Kang status_t err = mSource->read(&textBuffer, options); 456655174826330afe66ef766258181ae8c11f3f6cInsun Kang if (err != OK) { 466655174826330afe66ef766258181ae8c11f3f6cInsun Kang return err; 476655174826330afe66ef766258181ae8c11f3f6cInsun Kang } 486655174826330afe66ef766258181ae8c11f3f6cInsun Kang CHECK(textBuffer != NULL); 496655174826330afe66ef766258181ae8c11f3f6cInsun Kang textBuffer->meta_data()->findInt64(kKeyTime, timeUs); 506655174826330afe66ef766258181ae8c11f3f6cInsun Kang // TODO: this is legacy code. when 'timeUs' can be <= 0? 516655174826330afe66ef766258181ae8c11f3f6cInsun Kang if (*timeUs > 0) { 526655174826330afe66ef766258181ae8c11f3f6cInsun Kang extractAndAppendLocalDescriptions(*timeUs, textBuffer, parcel); 536655174826330afe66ef766258181ae8c11f3f6cInsun Kang } 546655174826330afe66ef766258181ae8c11f3f6cInsun Kang textBuffer->release(); 556655174826330afe66ef766258181ae8c11f3f6cInsun Kang return OK; 566655174826330afe66ef766258181ae8c11f3f6cInsun Kang} 576655174826330afe66ef766258181ae8c11f3f6cInsun Kang 586655174826330afe66ef766258181ae8c11f3f6cInsun Kang// Each text sample consists of a string of text, optionally with sample 596655174826330afe66ef766258181ae8c11f3f6cInsun Kang// modifier description. The modifier description could specify a new 606655174826330afe66ef766258181ae8c11f3f6cInsun Kang// text style for the string of text. These descriptions are present only 616655174826330afe66ef766258181ae8c11f3f6cInsun Kang// if they are needed. This method is used to extract the modifier 626655174826330afe66ef766258181ae8c11f3f6cInsun Kang// description and append it at the end of the text. 636655174826330afe66ef766258181ae8c11f3f6cInsun Kangstatus_t TimedTextInBandSource::extractAndAppendLocalDescriptions( 646655174826330afe66ef766258181ae8c11f3f6cInsun Kang int64_t timeUs, const MediaBuffer *textBuffer, Parcel *parcel) { 656655174826330afe66ef766258181ae8c11f3f6cInsun Kang const void *data; 666655174826330afe66ef766258181ae8c11f3f6cInsun Kang size_t size = 0; 676655174826330afe66ef766258181ae8c11f3f6cInsun Kang int32_t flag = TextDescriptions::LOCAL_DESCRIPTIONS; 686655174826330afe66ef766258181ae8c11f3f6cInsun Kang 696655174826330afe66ef766258181ae8c11f3f6cInsun Kang const char *mime; 706655174826330afe66ef766258181ae8c11f3f6cInsun Kang CHECK(mSource->getFormat()->findCString(kKeyMIMEType, &mime)); 716655174826330afe66ef766258181ae8c11f3f6cInsun Kang 726655174826330afe66ef766258181ae8c11f3f6cInsun Kang if (strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP) == 0) { 736655174826330afe66ef766258181ae8c11f3f6cInsun Kang data = textBuffer->data(); 746655174826330afe66ef766258181ae8c11f3f6cInsun Kang size = textBuffer->size(); 756655174826330afe66ef766258181ae8c11f3f6cInsun Kang 766655174826330afe66ef766258181ae8c11f3f6cInsun Kang if (size > 0) { 776655174826330afe66ef766258181ae8c11f3f6cInsun Kang parcel->freeData(); 786655174826330afe66ef766258181ae8c11f3f6cInsun Kang flag |= TextDescriptions::IN_BAND_TEXT_3GPP; 796655174826330afe66ef766258181ae8c11f3f6cInsun Kang return TextDescriptions::getParcelOfDescriptions( 806655174826330afe66ef766258181ae8c11f3f6cInsun Kang (const uint8_t *)data, size, flag, timeUs / 1000, parcel); 816655174826330afe66ef766258181ae8c11f3f6cInsun Kang } 826655174826330afe66ef766258181ae8c11f3f6cInsun Kang return OK; 836655174826330afe66ef766258181ae8c11f3f6cInsun Kang } 846655174826330afe66ef766258181ae8c11f3f6cInsun Kang return ERROR_UNSUPPORTED; 856655174826330afe66ef766258181ae8c11f3f6cInsun Kang} 866655174826330afe66ef766258181ae8c11f3f6cInsun Kang 876655174826330afe66ef766258181ae8c11f3f6cInsun Kang// To extract and send the global text descriptions for all the text samples 886655174826330afe66ef766258181ae8c11f3f6cInsun Kang// in the text track or text file. 896655174826330afe66ef766258181ae8c11f3f6cInsun Kang// TODO: send error message to application via notifyListener()...? 906655174826330afe66ef766258181ae8c11f3f6cInsun Kangstatus_t TimedTextInBandSource::extractGlobalDescriptions(Parcel *parcel) { 916655174826330afe66ef766258181ae8c11f3f6cInsun Kang const void *data; 926655174826330afe66ef766258181ae8c11f3f6cInsun Kang size_t size = 0; 936655174826330afe66ef766258181ae8c11f3f6cInsun Kang int32_t flag = TextDescriptions::GLOBAL_DESCRIPTIONS; 946655174826330afe66ef766258181ae8c11f3f6cInsun Kang 956655174826330afe66ef766258181ae8c11f3f6cInsun Kang const char *mime; 966655174826330afe66ef766258181ae8c11f3f6cInsun Kang CHECK(mSource->getFormat()->findCString(kKeyMIMEType, &mime)); 976655174826330afe66ef766258181ae8c11f3f6cInsun Kang 986655174826330afe66ef766258181ae8c11f3f6cInsun Kang // support 3GPP only for now 996655174826330afe66ef766258181ae8c11f3f6cInsun Kang if (strcasecmp(mime, MEDIA_MIMETYPE_TEXT_3GPP) == 0) { 1006655174826330afe66ef766258181ae8c11f3f6cInsun Kang uint32_t type; 1016655174826330afe66ef766258181ae8c11f3f6cInsun Kang // get the 'tx3g' box content. This box contains the text descriptions 1026655174826330afe66ef766258181ae8c11f3f6cInsun Kang // used to render the text track 1036655174826330afe66ef766258181ae8c11f3f6cInsun Kang if (!mSource->getFormat()->findData( 1046655174826330afe66ef766258181ae8c11f3f6cInsun Kang kKeyTextFormatData, &type, &data, &size)) { 1056655174826330afe66ef766258181ae8c11f3f6cInsun Kang return ERROR_MALFORMED; 1066655174826330afe66ef766258181ae8c11f3f6cInsun Kang } 1076655174826330afe66ef766258181ae8c11f3f6cInsun Kang 1086655174826330afe66ef766258181ae8c11f3f6cInsun Kang if (size > 0) { 1096655174826330afe66ef766258181ae8c11f3f6cInsun Kang flag |= TextDescriptions::IN_BAND_TEXT_3GPP; 1106655174826330afe66ef766258181ae8c11f3f6cInsun Kang return TextDescriptions::getParcelOfDescriptions( 1116655174826330afe66ef766258181ae8c11f3f6cInsun Kang (const uint8_t *)data, size, flag, 0, parcel); 1126655174826330afe66ef766258181ae8c11f3f6cInsun Kang } 1136655174826330afe66ef766258181ae8c11f3f6cInsun Kang return OK; 1146655174826330afe66ef766258181ae8c11f3f6cInsun Kang } 1156655174826330afe66ef766258181ae8c11f3f6cInsun Kang return ERROR_UNSUPPORTED; 1166655174826330afe66ef766258181ae8c11f3f6cInsun Kang} 1176655174826330afe66ef766258181ae8c11f3f6cInsun Kang 1186655174826330afe66ef766258181ae8c11f3f6cInsun Kang} // namespace android 119