1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/ogg/OggWriter.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,201 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.7 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +#include "OggWriter.h"
1.9 +#include "prtime.h"
1.10 +
1.11 +#undef LOG
1.12 +#ifdef MOZ_WIDGET_GONK
1.13 +#include <android/log.h>
1.14 +#define LOG(args...) __android_log_print(ANDROID_LOG_INFO, "MediaEncoder", ## args);
1.15 +#else
1.16 +#define LOG(args, ...)
1.17 +#endif
1.18 +
1.19 +namespace mozilla {
1.20 +
1.21 +OggWriter::OggWriter() : ContainerWriter()
1.22 +{
1.23 + if (NS_FAILED(Init())) {
1.24 + LOG("ERROR! Fail to initialize the OggWriter.");
1.25 + }
1.26 +}
1.27 +
1.28 +OggWriter::~OggWriter()
1.29 +{
1.30 + if (mInitialized) {
1.31 + ogg_stream_clear(&mOggStreamState);
1.32 + }
1.33 + // mPacket's data was always owned by us, no need to ogg_packet_clear.
1.34 +}
1.35 +
1.36 +nsresult
1.37 +OggWriter::Init()
1.38 +{
1.39 + MOZ_ASSERT(!mInitialized);
1.40 +
1.41 + // The serial number (serialno) should be a random number, for the current
1.42 + // implementation where the output file contains only a single stream, this
1.43 + // serialno is used to differentiate between files.
1.44 + srand(static_cast<unsigned>(PR_Now()));
1.45 + int rc = ogg_stream_init(&mOggStreamState, rand());
1.46 +
1.47 + mPacket.b_o_s = 1;
1.48 + mPacket.e_o_s = 0;
1.49 + mPacket.granulepos = 0;
1.50 + mPacket.packet = nullptr;
1.51 + mPacket.packetno = 0;
1.52 + mPacket.bytes = 0;
1.53 +
1.54 + mInitialized = (rc == 0);
1.55 +
1.56 + return (rc == 0) ? NS_OK : NS_ERROR_NOT_INITIALIZED;
1.57 +}
1.58 +
1.59 +nsresult
1.60 +OggWriter::WriteEncodedTrack(const EncodedFrameContainer& aData,
1.61 + uint32_t aFlags)
1.62 +{
1.63 + for (uint32_t i = 0; i < aData.GetEncodedFrames().Length(); i++) {
1.64 + if (aData.GetEncodedFrames()[i]->GetFrameType() != EncodedFrame::OPUS_AUDIO_FRAME) {
1.65 + LOG("[OggWriter] wrong encoded data type!");
1.66 + return NS_ERROR_FAILURE;
1.67 + }
1.68 +
1.69 + nsresult rv = WriteEncodedData(aData.GetEncodedFrames()[i]->GetFrameData(),
1.70 + aData.GetEncodedFrames()[i]->GetDuration(),
1.71 + aFlags);
1.72 + if (NS_FAILED(rv)) {
1.73 + LOG("%p Failed to WriteEncodedTrack!", this);
1.74 + return rv;
1.75 + }
1.76 + }
1.77 + return NS_OK;
1.78 +}
1.79 +
1.80 +nsresult
1.81 +OggWriter::WriteEncodedData(const nsTArray<uint8_t>& aBuffer, int aDuration,
1.82 + uint32_t aFlags)
1.83 +{
1.84 + if (!mInitialized) {
1.85 + LOG("[OggWriter] OggWriter has not initialized!");
1.86 + return NS_ERROR_FAILURE;
1.87 + }
1.88 +
1.89 + MOZ_ASSERT(!ogg_stream_eos(&mOggStreamState),
1.90 + "No data can be written after eos has marked.");
1.91 +
1.92 + // Set eos flag to true, and once the eos is written to a packet, there must
1.93 + // not be anymore pages after a page has marked as eos.
1.94 + if (aFlags & ContainerWriter::END_OF_STREAM) {
1.95 + LOG("[OggWriter] Set e_o_s flag to true.");
1.96 + mPacket.e_o_s = 1;
1.97 + }
1.98 +
1.99 + mPacket.packet = const_cast<uint8_t*>(aBuffer.Elements());
1.100 + mPacket.bytes = aBuffer.Length();
1.101 + mPacket.granulepos += aDuration;
1.102 +
1.103 + // 0 returned on success. -1 returned in the event of internal error.
1.104 + // The data in the packet is copied into the internal storage managed by the
1.105 + // mOggStreamState, so we are free to alter the contents of mPacket after
1.106 + // this call has returned.
1.107 + int rc = ogg_stream_packetin(&mOggStreamState, &mPacket);
1.108 + if (rc < 0) {
1.109 + LOG("[OggWriter] Failed in ogg_stream_packetin! (%d).", rc);
1.110 + return NS_ERROR_FAILURE;
1.111 + }
1.112 +
1.113 + if (mPacket.b_o_s) {
1.114 + mPacket.b_o_s = 0;
1.115 + }
1.116 + mPacket.packetno++;
1.117 + mPacket.packet = nullptr;
1.118 +
1.119 + return NS_OK;
1.120 +}
1.121 +
1.122 +void
1.123 +OggWriter::ProduceOggPage(nsTArray<nsTArray<uint8_t> >* aOutputBufs)
1.124 +{
1.125 + aOutputBufs->AppendElement();
1.126 + aOutputBufs->LastElement().SetLength(mOggPage.header_len +
1.127 + mOggPage.body_len);
1.128 + memcpy(aOutputBufs->LastElement().Elements(), mOggPage.header,
1.129 + mOggPage.header_len);
1.130 + memcpy(aOutputBufs->LastElement().Elements() + mOggPage.header_len,
1.131 + mOggPage.body, mOggPage.body_len);
1.132 +}
1.133 +
1.134 +nsresult
1.135 +OggWriter::GetContainerData(nsTArray<nsTArray<uint8_t> >* aOutputBufs,
1.136 + uint32_t aFlags)
1.137 +{
1.138 + int rc = -1;
1.139 + // Generate the oggOpus Header
1.140 + if (aFlags & ContainerWriter::GET_HEADER) {
1.141 + OpusMetadata* meta = static_cast<OpusMetadata*>(mMetadata.get());
1.142 + NS_ASSERTION(meta, "should have meta data");
1.143 + NS_ASSERTION(meta->GetKind() == TrackMetadataBase::METADATA_OPUS,
1.144 + "should have Opus meta data");
1.145 +
1.146 + nsresult rv = WriteEncodedData(meta->mIdHeader, 0);
1.147 + NS_ENSURE_SUCCESS(rv, rv);
1.148 +
1.149 + rc = ogg_stream_flush(&mOggStreamState, &mOggPage);
1.150 + NS_ENSURE_TRUE(rc > 0, NS_ERROR_FAILURE);
1.151 + ProduceOggPage(aOutputBufs);
1.152 +
1.153 + rv = WriteEncodedData(meta->mCommentHeader, 0);
1.154 + NS_ENSURE_SUCCESS(rv, rv);
1.155 +
1.156 + rc = ogg_stream_flush(&mOggStreamState, &mOggPage);
1.157 + NS_ENSURE_TRUE(rc > 0, NS_ERROR_FAILURE);
1.158 +
1.159 + ProduceOggPage(aOutputBufs);
1.160 + return NS_OK;
1.161 +
1.162 + // Force generate a page even if the amount of packet data is not enough.
1.163 + // Usually do so after a header packet.
1.164 + } else if (aFlags & ContainerWriter::FLUSH_NEEDED) {
1.165 + // rc = 0 means no packet to put into a page, or an internal error.
1.166 + rc = ogg_stream_flush(&mOggStreamState, &mOggPage);
1.167 + } else {
1.168 + // rc = 0 means insufficient data has accumulated to fill a page, or an
1.169 + // internal error has occurred.
1.170 + rc = ogg_stream_pageout(&mOggStreamState, &mOggPage);
1.171 + }
1.172 +
1.173 + if (rc) {
1.174 + ProduceOggPage(aOutputBufs);
1.175 + }
1.176 + if (aFlags & ContainerWriter::FLUSH_NEEDED) {
1.177 + mIsWritingComplete = true;
1.178 + }
1.179 + return (rc > 0) ? NS_OK : NS_ERROR_FAILURE;
1.180 +}
1.181 +
1.182 +nsresult
1.183 +OggWriter::SetMetadata(TrackMetadataBase* aMetadata)
1.184 +{
1.185 + MOZ_ASSERT(aMetadata);
1.186 + if (aMetadata->GetKind() != TrackMetadataBase::METADATA_OPUS) {
1.187 + LOG("wrong meta data type!");
1.188 + return NS_ERROR_FAILURE;
1.189 + }
1.190 + // Validate each field of METADATA
1.191 + mMetadata = static_cast<OpusMetadata*>(aMetadata);
1.192 + if (mMetadata->mIdHeader.Length() == 0) {
1.193 + LOG("miss mIdHeader!");
1.194 + return NS_ERROR_FAILURE;
1.195 + }
1.196 + if (mMetadata->mCommentHeader.Length() == 0) {
1.197 + LOG("miss mCommentHeader!");
1.198 + return NS_ERROR_FAILURE;
1.199 + }
1.200 +
1.201 + return NS_OK;
1.202 +}
1.203 +
1.204 +}
