diff options
Diffstat (limited to 'media/libstagefright/rtsp/ARawAudioAssembler.cpp')
-rw-r--r-- | media/libstagefright/rtsp/ARawAudioAssembler.cpp | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/media/libstagefright/rtsp/ARawAudioAssembler.cpp b/media/libstagefright/rtsp/ARawAudioAssembler.cpp new file mode 100644 index 0000000..dd47ea3 --- /dev/null +++ b/media/libstagefright/rtsp/ARawAudioAssembler.cpp @@ -0,0 +1,143 @@ +/* + * Copyright (C) 2011 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +//#define LOG_NDEBUG 0 +#define LOG_TAG "ARawAudioAssembler" +#include <utils/Log.h> + +#include "ARawAudioAssembler.h" + +#include "ARTPSource.h" +#include "ASessionDescription.h" + +#include <media/stagefright/foundation/ABuffer.h> +#include <media/stagefright/foundation/ADebug.h> +#include <media/stagefright/foundation/AMessage.h> +#include <media/stagefright/foundation/hexdump.h> +#include <media/stagefright/MediaDefs.h> +#include <media/stagefright/MetaData.h> +#include <media/stagefright/Utils.h> + +namespace android { + +ARawAudioAssembler::ARawAudioAssembler( + const sp<AMessage> ¬ify, const char *desc, const AString ¶ms) + : mNotifyMsg(notify), + mNextExpectedSeqNoValid(false), + mNextExpectedSeqNo(0) { +} + +ARawAudioAssembler::~ARawAudioAssembler() { +} + +ARTPAssembler::AssemblyStatus ARawAudioAssembler::assembleMore( + const sp<ARTPSource> &source) { + return addPacket(source); +} + +ARTPAssembler::AssemblyStatus ARawAudioAssembler::addPacket( + const sp<ARTPSource> &source) { + List<sp<ABuffer> > *queue = source->queue(); + + if (queue->empty()) { + return NOT_ENOUGH_DATA; + } + + if (mNextExpectedSeqNoValid) { + List<sp<ABuffer> >::iterator it = queue->begin(); + while (it != queue->end()) { + if ((uint32_t)(*it)->int32Data() >= mNextExpectedSeqNo) { + break; + } + + it = queue->erase(it); + } + + if (queue->empty()) { + return NOT_ENOUGH_DATA; + } + } + + sp<ABuffer> buffer = *queue->begin(); + + if (!mNextExpectedSeqNoValid) { + mNextExpectedSeqNoValid = true; + mNextExpectedSeqNo = (uint32_t)buffer->int32Data(); + } else if ((uint32_t)buffer->int32Data() != mNextExpectedSeqNo) { + LOGV("Not the sequence number I expected"); + + return WRONG_SEQUENCE_NUMBER; + } + + // hexdump(buffer->data(), buffer->size()); + + if (buffer->size() < 1) { + queue->erase(queue->begin()); + ++mNextExpectedSeqNo; + + LOGV("raw audio packet too short."); + + return MALFORMED_PACKET; + } + + sp<AMessage> msg = mNotifyMsg->dup(); + msg->setObject("access-unit", buffer); + msg->post(); + + queue->erase(queue->begin()); + ++mNextExpectedSeqNo; + + return OK; +} + +void ARawAudioAssembler::packetLost() { + CHECK(mNextExpectedSeqNoValid); + ++mNextExpectedSeqNo; +} + +void ARawAudioAssembler::onByeReceived() { + sp<AMessage> msg = mNotifyMsg->dup(); + msg->setInt32("eos", true); + msg->post(); +} + +// static +bool ARawAudioAssembler::Supports(const char *desc) { + return !strncmp(desc, "PCMU/", 5) + || !strncmp(desc, "PCMA/", 5); +} + +// static +void ARawAudioAssembler::MakeFormat( + const char *desc, const sp<MetaData> &format) { + if (!strncmp(desc, "PCMU/", 5)) { + format->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_G711_MLAW); + } else if (!strncmp(desc, "PCMA/", 5)) { + format->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_G711_ALAW); + } else { + TRESPASS(); + } + + int32_t sampleRate, numChannels; + ASessionDescription::ParseFormatDesc( + desc, &sampleRate, &numChannels); + + format->setInt32(kKeySampleRate, sampleRate); + format->setInt32(kKeyChannelCount, numChannels); +} + +} // namespace android + |