diff options
Diffstat (limited to 'dom/media/ogg/OggWriter.cpp')
| -rw-r--r-- | dom/media/ogg/OggWriter.cpp | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/dom/media/ogg/OggWriter.cpp b/dom/media/ogg/OggWriter.cpp new file mode 100644 index 0000000000..6f29d44124 --- /dev/null +++ b/dom/media/ogg/OggWriter.cpp @@ -0,0 +1,197 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ +#include "OggWriter.h" +#include "prtime.h" +#include "mozilla/ProfilerLabels.h" + +#define LOG(args, ...) + +namespace mozilla { + +OggWriter::OggWriter() + : ContainerWriter(), mOggStreamState(), mOggPage(), mPacket() { + if (NS_FAILED(Init())) { + LOG("ERROR! Fail to initialize the OggWriter."); + } +} + +OggWriter::~OggWriter() { + if (mInitialized) { + ogg_stream_clear(&mOggStreamState); + } + // mPacket's data was always owned by us, no need to ogg_packet_clear. +} + +nsresult OggWriter::Init() { + MOZ_ASSERT(!mInitialized); + + // The serial number (serialno) should be a random number, for the current + // implementation where the output file contains only a single stream, this + // serialno is used to differentiate between files. + srand(static_cast<unsigned>(PR_Now())); + int rc = ogg_stream_init(&mOggStreamState, rand()); + + mPacket.b_o_s = 1; + mPacket.e_o_s = 0; + mPacket.granulepos = 0; + mPacket.packet = nullptr; + mPacket.packetno = 0; + mPacket.bytes = 0; + + mInitialized = (rc == 0); + + return (rc == 0) ? NS_OK : NS_ERROR_NOT_INITIALIZED; +} + +nsresult OggWriter::WriteEncodedTrack( + const nsTArray<RefPtr<EncodedFrame>>& aData, uint32_t aFlags) { + AUTO_PROFILER_LABEL("OggWriter::WriteEncodedTrack", OTHER); + + uint32_t len = aData.Length(); + for (uint32_t i = 0; i < len; i++) { + if (aData[i]->mFrameType != EncodedFrame::OPUS_AUDIO_FRAME) { + LOG("[OggWriter] wrong encoded data type!"); + return NS_ERROR_FAILURE; + } + + // only pass END_OF_STREAM on the last frame! + nsresult rv = WriteEncodedData( + *aData[i]->mFrameData, aData[i]->mDuration, + i < len - 1 ? (aFlags & ~ContainerWriter::END_OF_STREAM) : aFlags); + if (NS_FAILED(rv)) { + LOG("%p Failed to WriteEncodedTrack!", this); + return rv; + } + } + return NS_OK; +} + +nsresult OggWriter::WriteEncodedData(const nsTArray<uint8_t>& aBuffer, + int aDuration, uint32_t aFlags) { + if (!mInitialized) { + LOG("[OggWriter] OggWriter has not initialized!"); + return NS_ERROR_FAILURE; + } + + MOZ_ASSERT(!ogg_stream_eos(&mOggStreamState), + "No data can be written after eos has marked."); + + // Set eos flag to true, and once the eos is written to a packet, there must + // not be anymore pages after a page has marked as eos. + if (aFlags & ContainerWriter::END_OF_STREAM) { + LOG("[OggWriter] Set e_o_s flag to true."); + mPacket.e_o_s = 1; + } + + mPacket.packet = const_cast<uint8_t*>(aBuffer.Elements()); + mPacket.bytes = aBuffer.Length(); + mPacket.granulepos += aDuration; + + // 0 returned on success. -1 returned in the event of internal error. + // The data in the packet is copied into the internal storage managed by the + // mOggStreamState, so we are free to alter the contents of mPacket after + // this call has returned. + int rc = ogg_stream_packetin(&mOggStreamState, &mPacket); + if (rc < 0) { + LOG("[OggWriter] Failed in ogg_stream_packetin! (%d).", rc); + return NS_ERROR_FAILURE; + } + + if (mPacket.b_o_s) { + mPacket.b_o_s = 0; + } + mPacket.packetno++; + mPacket.packet = nullptr; + + return NS_OK; +} + +void OggWriter::ProduceOggPage(nsTArray<nsTArray<uint8_t>>* aOutputBufs) { + aOutputBufs->AppendElement(); + aOutputBufs->LastElement().SetLength(mOggPage.header_len + mOggPage.body_len); + memcpy(aOutputBufs->LastElement().Elements(), mOggPage.header, + mOggPage.header_len); + memcpy(aOutputBufs->LastElement().Elements() + mOggPage.header_len, + mOggPage.body, mOggPage.body_len); +} + +nsresult OggWriter::GetContainerData(nsTArray<nsTArray<uint8_t>>* aOutputBufs, + uint32_t aFlags) { + int rc = -1; + AUTO_PROFILER_LABEL("OggWriter::GetContainerData", OTHER); + // Generate the oggOpus Header + if (aFlags & ContainerWriter::GET_HEADER) { + OpusMetadata* meta = static_cast<OpusMetadata*>(mMetadata.get()); + NS_ASSERTION(meta, "should have meta data"); + NS_ASSERTION(meta->GetKind() == TrackMetadataBase::METADATA_OPUS, + "should have Opus meta data"); + + nsresult rv = WriteEncodedData(meta->mIdHeader, 0); + NS_ENSURE_SUCCESS(rv, rv); + + rc = ogg_stream_flush(&mOggStreamState, &mOggPage); + NS_ENSURE_TRUE(rc > 0, NS_ERROR_FAILURE); + ProduceOggPage(aOutputBufs); + + rv = WriteEncodedData(meta->mCommentHeader, 0); + NS_ENSURE_SUCCESS(rv, rv); + + rc = ogg_stream_flush(&mOggStreamState, &mOggPage); + NS_ENSURE_TRUE(rc > 0, NS_ERROR_FAILURE); + + // Force generate a page even if the amount of packet data is not enough. + // Usually do so after a header packet. + + ProduceOggPage(aOutputBufs); + } + + // return value 0 means insufficient data has accumulated to fill a page, or + // an internal error has occurred. + while (ogg_stream_pageout(&mOggStreamState, &mOggPage) != 0) { + ProduceOggPage(aOutputBufs); + } + + if (aFlags & ContainerWriter::FLUSH_NEEDED) { + // return value 0 means no packet to put into a page, or an internal error. + if (ogg_stream_flush(&mOggStreamState, &mOggPage) != 0) { + ProduceOggPage(aOutputBufs); + } + mIsWritingComplete = true; + } + + // We always return NS_OK here since it's OK to call this without having + // enough data to fill a page. It's the more common case compared to internal + // errors, and we cannot distinguish the two. + return NS_OK; +} + +nsresult OggWriter::SetMetadata( + const nsTArray<RefPtr<TrackMetadataBase>>& aMetadata) { + MOZ_ASSERT(aMetadata.Length() == 1); + MOZ_ASSERT(aMetadata[0]); + + AUTO_PROFILER_LABEL("OggWriter::SetMetadata", OTHER); + + if (aMetadata[0]->GetKind() != TrackMetadataBase::METADATA_OPUS) { + LOG("wrong meta data type!"); + return NS_ERROR_FAILURE; + } + // Validate each field of METADATA + mMetadata = static_cast<OpusMetadata*>(aMetadata[0].get()); + if (mMetadata->mIdHeader.Length() == 0) { + LOG("miss mIdHeader!"); + return NS_ERROR_FAILURE; + } + if (mMetadata->mCommentHeader.Length() == 0) { + LOG("miss mCommentHeader!"); + return NS_ERROR_FAILURE; + } + + return NS_OK; +} + +} // namespace mozilla + +#undef LOG |