Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 380 insertions, 0 deletions

diff --git a/dom/media/platforms/agnostic/OpusDecoder.cpp b/dom/media/platforms/agnostic/OpusDecoder.cpp
new file mode 100644
index 0000000000..715fa848dc
--- /dev/null
+++ b/dom/media/platforms/agnostic/OpusDecoder.cpp
@@ -0,0 +1,380 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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 "OpusDecoder.h"
+
+#include <inttypes.h>  // For PRId64
+
+#include "OpusParser.h"
+#include "TimeUnits.h"
+#include "VideoUtils.h"
+#include "VorbisDecoder.h"  // For VorbisLayout
+#include "VorbisUtils.h"
+#include "mozilla/EndianUtils.h"
+#include "mozilla/PodOperations.h"
+#include "mozilla/SyncRunnable.h"
+#include "opus/opus.h"
+extern "C" {
+#include "opus/opus_multistream.h"
+}
+
+#define OPUS_DEBUG(arg, ...)                                           \
+  DDMOZ_LOG(sPDMLog, mozilla::LogLevel::Debug, "::%s: " arg, __func__, \
+            ##__VA_ARGS__)
+
+namespace mozilla {
+
+OpusDataDecoder::OpusDataDecoder(const CreateDecoderParams& aParams)
+    : mInfo(aParams.AudioConfig()),
+      mOpusDecoder(nullptr),
+      mSkip(0),
+      mDecodedHeader(false),
+      mPaddingDiscarded(false),
+      mFrames(0),
+      mChannelMap(AudioConfig::ChannelLayout::UNKNOWN_MAP),
+      mDefaultPlaybackDeviceMono(aParams.mOptions.contains(
+          CreateDecoderParams::Option::DefaultPlaybackDeviceMono)) {}
+
+OpusDataDecoder::~OpusDataDecoder() {
+  if (mOpusDecoder) {
+    opus_multistream_decoder_destroy(mOpusDecoder);
+    mOpusDecoder = nullptr;
+  }
+}
+
+RefPtr<ShutdownPromise> OpusDataDecoder::Shutdown() {
+  // mThread may not be set if Init hasn't been called first.
+  MOZ_ASSERT(!mThread || mThread->IsOnCurrentThread());
+  return ShutdownPromise::CreateAndResolve(true, __func__);
+}
+
+RefPtr<MediaDataDecoder::InitPromise> OpusDataDecoder::Init() {
+  mThread = GetCurrentSerialEventTarget();
+  if (!mInfo.mCodecSpecificConfig.is<OpusCodecSpecificData>()) {
+    MOZ_ASSERT_UNREACHABLE();
+    OPUS_DEBUG("Opus decoder got non-opus codec specific data");
+    return InitPromise::CreateAndReject(
+        MediaResult(
+            NS_ERROR_DOM_MEDIA_FATAL_ERR,
+            RESULT_DETAIL("Opus decoder got non-opus codec specific data!")),
+        __func__);
+  }
+  const OpusCodecSpecificData opusCodecSpecificData =
+      mInfo.mCodecSpecificConfig.as<OpusCodecSpecificData>();
+  RefPtr<MediaByteBuffer> opusHeaderBlob =
+      opusCodecSpecificData.mHeadersBinaryBlob;
+  size_t length = opusHeaderBlob->Length();
+  uint8_t* p = opusHeaderBlob->Elements();
+  if (NS_FAILED(DecodeHeader(p, length))) {
+    OPUS_DEBUG("Error decoding header!");
+    return InitPromise::CreateAndReject(
+        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
+                    RESULT_DETAIL("Error decoding header!")),
+        __func__);
+  }
+
+  MOZ_ASSERT(mMappingTable.Length() >= uint32_t(mOpusParser->mChannels));
+  int r;
+  mOpusDecoder = opus_multistream_decoder_create(
+      mOpusParser->mRate, mOpusParser->mChannels, mOpusParser->mStreams,
+      mOpusParser->mCoupledStreams, mMappingTable.Elements(), &r);
+
+  if (!mOpusDecoder) {
+    OPUS_DEBUG("Error creating decoder!");
+    return InitPromise::CreateAndReject(
+        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
+                    RESULT_DETAIL("Error creating decoder!")),
+        __func__);
+  }
+
+  // Opus has a special feature for stereo coding where it represent wide
+  // stereo channels by 180-degree out of phase. This improves quality, but
+  // needs to be disabled when the output is downmixed to mono. Playback number
+  // of channels are set in AudioSink, using the same method
+  // `DecideAudioPlaybackChannels()`, and triggers downmix if needed.
+  if (mDefaultPlaybackDeviceMono || DecideAudioPlaybackChannels(mInfo) == 1) {
+    opus_multistream_decoder_ctl(mOpusDecoder,
+                                 OPUS_SET_PHASE_INVERSION_DISABLED(1));
+  }
+
+  mSkip = mOpusParser->mPreSkip;
+  mPaddingDiscarded = false;
+
+  if (opusCodecSpecificData.mContainerCodecDelayMicroSeconds !=
+      FramesToUsecs(mOpusParser->mPreSkip, mOpusParser->mRate).value()) {
+    NS_WARNING(
+        "Invalid Opus header: container CodecDelay and Opus pre-skip do not "
+        "match!");
+  }
+  OPUS_DEBUG("Opus preskip in extradata: %" PRId64 "us",
+             opusCodecSpecificData.mContainerCodecDelayMicroSeconds);
+
+  if (mInfo.mRate != (uint32_t)mOpusParser->mRate) {
+    NS_WARNING("Invalid Opus header: container and codec rate do not match!");
+  }
+  if (mInfo.mChannels != (uint32_t)mOpusParser->mChannels) {
+    NS_WARNING(
+        "Invalid Opus header: container and codec channels do not match!");
+  }
+
+  return r == OPUS_OK
+             ? InitPromise::CreateAndResolve(TrackInfo::kAudioTrack, __func__)
+             : InitPromise::CreateAndReject(
+                   MediaResult(
+                       NS_ERROR_DOM_MEDIA_FATAL_ERR,
+                       RESULT_DETAIL(
+                           "could not create opus multistream decoder!")),
+                   __func__);
+}
+
+nsresult OpusDataDecoder::DecodeHeader(const unsigned char* aData,
+                                       size_t aLength) {
+  MOZ_ASSERT(!mOpusParser);
+  MOZ_ASSERT(!mOpusDecoder);
+  MOZ_ASSERT(!mDecodedHeader);
+  mDecodedHeader = true;
+
+  mOpusParser = MakeUnique<OpusParser>();
+  if (!mOpusParser->DecodeHeader(const_cast<unsigned char*>(aData), aLength)) {
+    return NS_ERROR_FAILURE;
+  }
+  int channels = mOpusParser->mChannels;
+
+  mMappingTable.SetLength(channels);
+  AudioConfig::ChannelLayout vorbisLayout(
+      channels, VorbisDataDecoder::VorbisLayout(channels));
+  if (vorbisLayout.IsValid()) {
+    mChannelMap = vorbisLayout.Map();
+
+    AudioConfig::ChannelLayout smpteLayout(
+        AudioConfig::ChannelLayout::SMPTEDefault(vorbisLayout));
+
+    AutoTArray<uint8_t, 8> map;
+    map.SetLength(channels);
+    if (mOpusParser->mChannelMapping == 1 &&
+        vorbisLayout.MappingTable(smpteLayout, &map)) {
+      for (int i = 0; i < channels; i++) {
+        mMappingTable[i] = mOpusParser->mMappingTable[map[i]];
+      }
+    } else {
+      // Use Opus set channel mapping and return channels as-is.
+      PodCopy(mMappingTable.Elements(), mOpusParser->mMappingTable, channels);
+    }
+  } else {
+    // Create a dummy mapping table so that channel ordering stay the same
+    // during decoding.
+    for (int i = 0; i < channels; i++) {
+      mMappingTable[i] = i;
+    }
+  }
+
+  return NS_OK;
+}
+
+RefPtr<MediaDataDecoder::DecodePromise> OpusDataDecoder::Decode(
+    MediaRawData* aSample) {
+  MOZ_ASSERT(mThread->IsOnCurrentThread());
+  PROCESS_DECODE_LOG(aSample);
+  uint32_t channels = mOpusParser->mChannels;
+
+  if (mPaddingDiscarded) {
+    // Discard padding should be used only on the final packet, so
+    // decoding after a padding discard is invalid.
+    OPUS_DEBUG("Opus error, discard padding on interstitial packet");
+    return DecodePromise::CreateAndReject(
+        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
+                    RESULT_DETAIL("Discard padding on interstitial packet")),
+        __func__);
+  }
+
+  if (!mLastFrameTime ||
+      mLastFrameTime.ref() != aSample->mTime.ToMicroseconds()) {
+    // We are starting a new block.
+    mFrames = 0;
+    mLastFrameTime = Some(aSample->mTime.ToMicroseconds());
+  }
+
+  // Maximum value is 63*2880, so there's no chance of overflow.
+  int frames_number =
+      opus_packet_get_nb_frames(aSample->Data(), aSample->Size());
+  if (frames_number <= 0) {
+    OPUS_DEBUG("Invalid packet header: r=%d length=%zu", frames_number,
+               aSample->Size());
+    return DecodePromise::CreateAndReject(
+        MediaResult(NS_ERROR_DOM_MEDIA_DECODE_ERR,
+                    RESULT_DETAIL("Invalid packet header: r=%d length=%u",
+                                  frames_number, uint32_t(aSample->Size()))),
+        __func__);
+  }
+
+  int samples = opus_packet_get_samples_per_frame(
+      aSample->Data(), opus_int32(mOpusParser->mRate));
+
+  // A valid Opus packet must be between 2.5 and 120 ms long (48kHz).
+  CheckedInt32 totalFrames =
+      CheckedInt32(frames_number) * CheckedInt32(samples);
+  if (!totalFrames.isValid()) {
+    return DecodePromise::CreateAndReject(
+        MediaResult(NS_ERROR_DOM_MEDIA_DECODE_ERR,
+                    RESULT_DETAIL("Frames count overflow")),
+        __func__);
+  }
+
+  int frames = totalFrames.value();
+  if (frames < 120 || frames > 5760) {
+    OPUS_DEBUG("Invalid packet frames: %d", frames);
+    return DecodePromise::CreateAndReject(
+        MediaResult(NS_ERROR_DOM_MEDIA_DECODE_ERR,
+                    RESULT_DETAIL("Invalid packet frames:%d", frames)),
+        __func__);
+  }
+
+  AlignedAudioBuffer buffer(frames * channels);
+  if (!buffer) {
+    return DecodePromise::CreateAndReject(
+        MediaResult(NS_ERROR_OUT_OF_MEMORY, __func__), __func__);
+  }
+
+  // Decode to the appropriate sample type.
+#ifdef MOZ_SAMPLE_TYPE_FLOAT32
+  int ret = opus_multistream_decode_float(mOpusDecoder, aSample->Data(),
+                                          aSample->Size(), buffer.get(), frames,
+                                          false);
+#else
+  int ret =
+      opus_multistream_decode(mOpusDecoder, aSample->Data(), aSample->Size(),
+                              buffer.get(), frames, false);
+#endif
+  if (ret < 0) {
+    return DecodePromise::CreateAndReject(
+        MediaResult(NS_ERROR_DOM_MEDIA_DECODE_ERR,
+                    RESULT_DETAIL("Opus decoding error:%d", ret)),
+        __func__);
+  }
+  NS_ASSERTION(ret == frames, "Opus decoded too few audio samples");
+  auto startTime = aSample->mTime;
+
+  OPUS_DEBUG("Decoding frames: [%lf, %lf]", aSample->mTime.ToSeconds(),
+             aSample->GetEndTime().ToSeconds());
+
+  // Trim the initial frames while the decoder is settling.
+  if (mSkip > 0) {
+    int32_t skipFrames = std::min<int32_t>(mSkip, frames);
+    int32_t keepFrames = frames - skipFrames;
+    OPUS_DEBUG("Opus decoder trimming %d of %d frames", skipFrames, frames);
+    PodMove(buffer.get(), buffer.get() + skipFrames * channels,
+            keepFrames * channels);
+    startTime = startTime + media::TimeUnit(skipFrames, mOpusParser->mRate);
+    frames = keepFrames;
+    mSkip -= skipFrames;
+    aSample->mTime += media::TimeUnit(skipFrames, 48000);
+    aSample->mDuration -= media::TimeUnit(skipFrames, 48000);
+    OPUS_DEBUG("Adjusted frame after trimming pre-roll: [%lf, %lf]",
+               aSample->mTime.ToSeconds(), aSample->GetEndTime().ToSeconds());
+  }
+
+  if (aSample->mDiscardPadding > 0) {
+    OPUS_DEBUG("Opus decoder discarding %u of %d frames",
+               aSample->mDiscardPadding, frames);
+    // Padding discard is only supposed to happen on the final packet.
+    // Record the discard so we can return an error if another packet is
+    // decoded.
+    if (aSample->mDiscardPadding > uint32_t(frames)) {
+      // Discarding more than the entire packet is invalid.
+      OPUS_DEBUG("Opus error, discard padding larger than packet");
+      return DecodePromise::CreateAndReject(
+          MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
+                      RESULT_DETAIL("Discard padding larger than packet")),
+          __func__);
+    }
+
+    mPaddingDiscarded = true;
+    frames = frames - aSample->mDiscardPadding;
+  }
+
+  // Apply the header gain if one was specified.
+#ifdef MOZ_SAMPLE_TYPE_FLOAT32
+  if (mOpusParser->mGain != 1.0f) {
+    float gain = mOpusParser->mGain;
+    uint32_t samples = frames * channels;
+    for (uint32_t i = 0; i < samples; i++) {
+      buffer[i] *= gain;
+    }
+  }
+#else
+  if (mOpusParser->mGain_Q16 != 65536) {
+    int64_t gain_Q16 = mOpusParser->mGain_Q16;
+    uint32_t samples = frames * channels;
+    for (uint32_t i = 0; i < samples; i++) {
+      int32_t val = static_cast<int32_t>((gain_Q16 * buffer[i] + 32768) >> 16);
+      buffer[i] = static_cast<AudioDataValue>(MOZ_CLIP_TO_15(val));
+    }
+  }
+#endif
+
+  auto duration = media::TimeUnit(frames, mOpusParser->mRate);
+  if (!duration.IsValid()) {
+    return DecodePromise::CreateAndReject(
+        MediaResult(NS_ERROR_DOM_MEDIA_OVERFLOW_ERR,
+                    RESULT_DETAIL("Overflow converting WebM audio duration")),
+        __func__);
+  }
+  auto time = startTime -
+              media::TimeUnit(mOpusParser->mPreSkip, mOpusParser->mRate) +
+              media::TimeUnit(mFrames, mOpusParser->mRate);
+  if (!time.IsValid()) {
+    return DecodePromise::CreateAndReject(
+        MediaResult(NS_ERROR_DOM_MEDIA_OVERFLOW_ERR,
+                    RESULT_DETAIL("Overflow shifting tstamp by codec delay")),
+        __func__);
+  };
+
+  mFrames += frames;
+  mTotalFrames += frames;
+
+  OPUS_DEBUG("Total frames so far: %" PRId64, mTotalFrames);
+
+  if (!frames) {
+    return DecodePromise::CreateAndResolve(DecodedData(), __func__);
+  }
+
+  // Trim extra allocated frames.
+  buffer.SetLength(frames * channels);
+
+  return DecodePromise::CreateAndResolve(
+      DecodedData{new AudioData(aSample->mOffset, time, std::move(buffer),
+                                mOpusParser->mChannels, mOpusParser->mRate,
+                                mChannelMap)},
+      __func__);
+}
+
+RefPtr<MediaDataDecoder::DecodePromise> OpusDataDecoder::Drain() {
+  MOZ_ASSERT(mThread->IsOnCurrentThread());
+  return DecodePromise::CreateAndResolve(DecodedData(), __func__);
+}
+
+RefPtr<MediaDataDecoder::FlushPromise> OpusDataDecoder::Flush() {
+  MOZ_ASSERT(mThread->IsOnCurrentThread());
+  if (!mOpusDecoder) {
+    return FlushPromise::CreateAndResolve(true, __func__);
+  }
+
+  MOZ_ASSERT(mOpusDecoder);
+  // Reset the decoder.
+  opus_multistream_decoder_ctl(mOpusDecoder, OPUS_RESET_STATE);
+  mSkip = mOpusParser->mPreSkip;
+  mPaddingDiscarded = false;
+  mLastFrameTime.reset();
+  return FlushPromise::CreateAndResolve(true, __func__);
+}
+
+/* static */
+bool OpusDataDecoder::IsOpus(const nsACString& aMimeType) {
+  return aMimeType.EqualsLiteral("audio/opus");
+}
+
+}  // namespace mozilla
+#undef OPUS_DEBUG