Source code

Revision control

Other Tools

/* -*- 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 "GeckoProfiler.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);
}
if (aFlags & ContainerWriter::FLUSH_NEEDED) {
// rc = 0 means no packet to put into a page, or an internal error.
rc = ogg_stream_flush(&mOggStreamState, &mOggPage);
} else {
// rc = 0 means insufficient data has accumulated to fill a page, or an
// internal error has occurred.
rc = ogg_stream_pageout(&mOggStreamState, &mOggPage);
}
if (rc) {
ProduceOggPage(aOutputBufs);
}
if (aFlags & ContainerWriter::FLUSH_NEEDED) {
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