Add m-esr52 at 52.6.0

1 files changed, 393 insertions, 0 deletions

diff --git a/dom/media/AudioConverter.cpp b/dom/media/AudioConverter.cpp
new file mode 100644
index 000000000..77ad46ec6
--- /dev/null
+++ b/dom/media/AudioConverter.cpp
@@ -0,0 +1,393 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "AudioConverter.h"
+#include <string.h>
+#include <speex/speex_resampler.h>
+#include <cmath>
+
+/*
+ *  Parts derived from MythTV AudioConvert Class
+ *  Created by Jean-Yves Avenard.
+ *
+ *  Copyright (C) Bubblestuff Pty Ltd 2013
+ *  Copyright (C) foobum@gmail.com 2010
+ */
+
+namespace mozilla {
+
+AudioConverter::AudioConverter(const AudioConfig& aIn, const AudioConfig& aOut)
+  : mIn(aIn)
+  , mOut(aOut)
+  , mResampler(nullptr)
+{
+  MOZ_DIAGNOSTIC_ASSERT(aIn.Format() == aOut.Format() &&
+                        aIn.Interleaved() == aOut.Interleaved(),
+                        "No format or rate conversion is supported at this stage");
+  MOZ_DIAGNOSTIC_ASSERT(aOut.Channels() <= 2 ||
+                        aIn.Channels() == aOut.Channels(),
+                        "Only down/upmixing to mono or stereo is supported at this stage");
+  MOZ_DIAGNOSTIC_ASSERT(aOut.Interleaved(), "planar audio format not supported");
+  mIn.Layout().MappingTable(mOut.Layout(), mChannelOrderMap);
+  if (aIn.Rate() != aOut.Rate()) {
+    RecreateResampler();
+  }
+}
+
+AudioConverter::~AudioConverter()
+{
+  if (mResampler) {
+    speex_resampler_destroy(mResampler);
+    mResampler = nullptr;
+  }
+}
+
+bool
+AudioConverter::CanWorkInPlace() const
+{
+  bool needDownmix = mIn.Channels() > mOut.Channels();
+  bool needUpmix = mIn.Channels() < mOut.Channels();
+  bool canDownmixInPlace =
+    mIn.Channels() * AudioConfig::SampleSize(mIn.Format()) >=
+    mOut.Channels() * AudioConfig::SampleSize(mOut.Format());
+  bool needResample = mIn.Rate() != mOut.Rate();
+  bool canResampleInPlace = mIn.Rate() >= mOut.Rate();
+  // We should be able to work in place if 1s of audio input takes less space
+  // than 1s of audio output. However, as we downmix before resampling we can't
+  // perform any upsampling in place (e.g. if incoming rate >= outgoing rate)
+  return !needUpmix && (!needDownmix || canDownmixInPlace) &&
+         (!needResample || canResampleInPlace);
+}
+
+size_t
+AudioConverter::ProcessInternal(void* aOut, const void* aIn, size_t aFrames)
+{
+  if (mIn.Channels() > mOut.Channels()) {
+    return DownmixAudio(aOut, aIn, aFrames);
+  } else if (mIn.Channels() < mOut.Channels()) {
+    return UpmixAudio(aOut, aIn, aFrames);
+  } else if (mIn.Layout() != mOut.Layout() && CanReorderAudio()) {
+    ReOrderInterleavedChannels(aOut, aIn, aFrames);
+  } else if (aIn != aOut) {
+    memmove(aOut, aIn, FramesOutToBytes(aFrames));
+  }
+  return aFrames;
+}
+
+// Reorder interleaved channels.
+// Can work in place (e.g aOut == aIn).
+template <class AudioDataType>
+void
+_ReOrderInterleavedChannels(AudioDataType* aOut, const AudioDataType* aIn,
+                            uint32_t aFrames, uint32_t aChannels,
+                            const uint8_t* aChannelOrderMap)
+{
+  MOZ_DIAGNOSTIC_ASSERT(aChannels <= MAX_AUDIO_CHANNELS);
+  AudioDataType val[MAX_AUDIO_CHANNELS];
+  for (uint32_t i = 0; i < aFrames; i++) {
+    for (uint32_t j = 0; j < aChannels; j++) {
+      val[j] = aIn[aChannelOrderMap[j]];
+    }
+    for (uint32_t j = 0; j < aChannels; j++) {
+      aOut[j] = val[j];
+    }
+    aOut += aChannels;
+    aIn += aChannels;
+  }
+}
+
+void
+AudioConverter::ReOrderInterleavedChannels(void* aOut, const void* aIn,
+                                           size_t aFrames) const
+{
+  MOZ_DIAGNOSTIC_ASSERT(mIn.Channels() == mOut.Channels());
+
+  if (mOut.Channels() == 1 || mOut.Layout() == mIn.Layout()) {
+    // If channel count is 1, planar and non-planar formats are the same and
+    // there's nothing to reorder.
+    if (aOut != aIn) {
+      memmove(aOut, aIn, FramesOutToBytes(aFrames));
+    }
+    return;
+  }
+
+  uint32_t bits = AudioConfig::FormatToBits(mOut.Format());
+  switch (bits) {
+    case 8:
+      _ReOrderInterleavedChannels((uint8_t*)aOut, (const uint8_t*)aIn,
+                                  aFrames, mIn.Channels(), mChannelOrderMap);
+      break;
+    case 16:
+      _ReOrderInterleavedChannels((int16_t*)aOut,(const int16_t*)aIn,
+                                  aFrames, mIn.Channels(), mChannelOrderMap);
+      break;
+    default:
+      MOZ_DIAGNOSTIC_ASSERT(AudioConfig::SampleSize(mOut.Format()) == 4);
+      _ReOrderInterleavedChannels((int32_t*)aOut,(const int32_t*)aIn,
+                                  aFrames, mIn.Channels(), mChannelOrderMap);
+      break;
+  }
+}
+
+static inline int16_t clipTo15(int32_t aX)
+{
+  return aX < -32768 ? -32768 : aX <= 32767 ? aX : 32767;
+}
+
+size_t
+AudioConverter::DownmixAudio(void* aOut, const void* aIn, size_t aFrames) const
+{
+  MOZ_ASSERT(mIn.Format() == AudioConfig::FORMAT_S16 ||
+             mIn.Format() == AudioConfig::FORMAT_FLT);
+  MOZ_ASSERT(mIn.Channels() >= mOut.Channels());
+  MOZ_ASSERT(mIn.Layout() == AudioConfig::ChannelLayout(mIn.Channels()),
+             "Can only downmix input data in SMPTE layout");
+  MOZ_ASSERT(mOut.Layout() == AudioConfig::ChannelLayout(2) ||
+             mOut.Layout() == AudioConfig::ChannelLayout(1));
+
+  uint32_t channels = mIn.Channels();
+
+  if (channels == 1 && mOut.Channels() == 1) {
+    if (aOut != aIn) {
+      memmove(aOut, aIn, FramesOutToBytes(aFrames));
+    }
+    return aFrames;
+  }
+
+  if (channels > 2) {
+    if (mIn.Format() == AudioConfig::FORMAT_FLT) {
+      // Downmix matrix. Per-row normalization 1 for rows 3,4 and 2 for rows 5-8.
+      static const float dmatrix[6][8][2]= {
+          /*3*/{{0.5858f,0},{0,0.5858f},{0.4142f,0.4142f}},
+          /*4*/{{0.4226f,0},{0,0.4226f},{0.366f, 0.2114f},{0.2114f,0.366f}},
+          /*5*/{{0.6510f,0},{0,0.6510f},{0.4600f,0.4600f},{0.5636f,0.3254f},{0.3254f,0.5636f}},
+          /*6*/{{0.5290f,0},{0,0.5290f},{0.3741f,0.3741f},{0.3741f,0.3741f},{0.4582f,0.2645f},{0.2645f,0.4582f}},
+          /*7*/{{0.4553f,0},{0,0.4553f},{0.3220f,0.3220f},{0.3220f,0.3220f},{0.2788f,0.2788f},{0.3943f,0.2277f},{0.2277f,0.3943f}},
+          /*8*/{{0.3886f,0},{0,0.3886f},{0.2748f,0.2748f},{0.2748f,0.2748f},{0.3366f,0.1943f},{0.1943f,0.3366f},{0.3366f,0.1943f},{0.1943f,0.3366f}},
+      };
+      // Re-write the buffer with downmixed data
+      const float* in = static_cast<const float*>(aIn);
+      float* out = static_cast<float*>(aOut);
+      for (uint32_t i = 0; i < aFrames; i++) {
+        float sampL = 0.0;
+        float sampR = 0.0;
+        for (uint32_t j = 0; j < channels; j++) {
+          sampL += in[i*mIn.Channels()+j]*dmatrix[mIn.Channels()-3][j][0];
+          sampR += in[i*mIn.Channels()+j]*dmatrix[mIn.Channels()-3][j][1];
+        }
+        *out++ = sampL;
+        *out++ = sampR;
+      }
+    } else if (mIn.Format() == AudioConfig::FORMAT_S16) {
+      // Downmix matrix. Per-row normalization 1 for rows 3,4 and 2 for rows 5-8.
+      // Coefficients in Q14.
+      static const int16_t dmatrix[6][8][2]= {
+          /*3*/{{9598, 0},{0,   9598},{6786,6786}},
+          /*4*/{{6925, 0},{0,   6925},{5997,3462},{3462,5997}},
+          /*5*/{{10663,0},{0,  10663},{7540,7540},{9234,5331},{5331,9234}},
+          /*6*/{{8668, 0},{0,   8668},{6129,6129},{6129,6129},{7507,4335},{4335,7507}},
+          /*7*/{{7459, 0},{0,   7459},{5275,5275},{5275,5275},{4568,4568},{6460,3731},{3731,6460}},
+          /*8*/{{6368, 0},{0,   6368},{4502,4502},{4502,4502},{5514,3184},{3184,5514},{5514,3184},{3184,5514}}
+      };
+      // Re-write the buffer with downmixed data
+      const int16_t* in = static_cast<const int16_t*>(aIn);
+      int16_t* out = static_cast<int16_t*>(aOut);
+      for (uint32_t i = 0; i < aFrames; i++) {
+        int32_t sampL = 0;
+        int32_t sampR = 0;
+        for (uint32_t j = 0; j < channels; j++) {
+          sampL+=in[i*channels+j]*dmatrix[channels-3][j][0];
+          sampR+=in[i*channels+j]*dmatrix[channels-3][j][1];
+        }
+        *out++ = clipTo15((sampL + 8192)>>14);
+        *out++ = clipTo15((sampR + 8192)>>14);
+      }
+    } else {
+      MOZ_DIAGNOSTIC_ASSERT(false, "Unsupported data type");
+    }
+
+    // If we are to continue downmixing to mono, start working on the output
+    // buffer.
+    aIn = aOut;
+    channels = 2;
+  }
+
+  if (mOut.Channels() == 1) {
+    if (mIn.Format() == AudioConfig::FORMAT_FLT) {
+      const float* in = static_cast<const float*>(aIn);
+      float* out = static_cast<float*>(aOut);
+      for (size_t fIdx = 0; fIdx < aFrames; ++fIdx) {
+        float sample = 0.0;
+        // The sample of the buffer would be interleaved.
+        sample = (in[fIdx*channels] + in[fIdx*channels + 1]) * 0.5;
+        *out++ = sample;
+      }
+    } else if (mIn.Format() == AudioConfig::FORMAT_S16) {
+      const int16_t* in = static_cast<const int16_t*>(aIn);
+      int16_t* out = static_cast<int16_t*>(aOut);
+      for (size_t fIdx = 0; fIdx < aFrames; ++fIdx) {
+        int32_t sample = 0.0;
+        // The sample of the buffer would be interleaved.
+        sample = (in[fIdx*channels] + in[fIdx*channels + 1]) * 0.5;
+        *out++ = sample;
+      }
+    } else {
+      MOZ_DIAGNOSTIC_ASSERT(false, "Unsupported data type");
+    }
+  }
+  return aFrames;
+}
+
+size_t
+AudioConverter::ResampleAudio(void* aOut, const void* aIn, size_t aFrames)
+{
+  if (!mResampler) {
+    return 0;
+  }
+  uint32_t outframes = ResampleRecipientFrames(aFrames);
+  uint32_t inframes = aFrames;
+
+  int error;
+  if (mOut.Format() == AudioConfig::FORMAT_FLT) {
+    const float* in = reinterpret_cast<const float*>(aIn);
+    float* out = reinterpret_cast<float*>(aOut);
+    error =
+      speex_resampler_process_interleaved_float(mResampler, in, &inframes,
+                                                out, &outframes);
+  } else if (mOut.Format() == AudioConfig::FORMAT_S16) {
+    const int16_t* in = reinterpret_cast<const int16_t*>(aIn);
+    int16_t* out = reinterpret_cast<int16_t*>(aOut);
+    error =
+      speex_resampler_process_interleaved_int(mResampler, in, &inframes,
+                                              out, &outframes);
+  } else {
+    MOZ_DIAGNOSTIC_ASSERT(false, "Unsupported data type");
+    error = RESAMPLER_ERR_ALLOC_FAILED;
+  }
+  MOZ_ASSERT(error == RESAMPLER_ERR_SUCCESS);
+  if (error != RESAMPLER_ERR_SUCCESS) {
+    speex_resampler_destroy(mResampler);
+    mResampler = nullptr;
+    return 0;
+  }
+  MOZ_ASSERT(inframes == aFrames, "Some frames will be dropped");
+  return outframes;
+}
+
+void
+AudioConverter::RecreateResampler()
+{
+  if (mResampler) {
+    speex_resampler_destroy(mResampler);
+  }
+  int error;
+  mResampler = speex_resampler_init(mOut.Channels(),
+                                    mIn.Rate(),
+                                    mOut.Rate(),
+                                    SPEEX_RESAMPLER_QUALITY_DEFAULT,
+                                    &error);
+
+  if (error == RESAMPLER_ERR_SUCCESS) {
+    speex_resampler_skip_zeros(mResampler);
+  } else {
+    NS_WARNING("Failed to initialize resampler.");
+    mResampler = nullptr;
+  }
+}
+
+size_t
+AudioConverter::DrainResampler(void* aOut)
+{
+  if (!mResampler) {
+    return 0;
+  }
+  int frames = speex_resampler_get_input_latency(mResampler);
+  AlignedByteBuffer buffer(FramesOutToBytes(frames));
+  if (!buffer) {
+    // OOM
+    return 0;
+  }
+  frames = ResampleAudio(aOut, buffer.Data(), frames);
+  // Tore down the resampler as it's easier than handling follow-up.
+  RecreateResampler();
+  return frames;
+}
+
+size_t
+AudioConverter::UpmixAudio(void* aOut, const void* aIn, size_t aFrames) const
+{
+  MOZ_ASSERT(mIn.Format() == AudioConfig::FORMAT_S16 ||
+             mIn.Format() == AudioConfig::FORMAT_FLT);
+  MOZ_ASSERT(mIn.Channels() < mOut.Channels());
+  MOZ_ASSERT(mIn.Channels() == 1, "Can only upmix mono for now");
+  MOZ_ASSERT(mOut.Channels() == 2, "Can only upmix to stereo for now");
+
+  if (mOut.Channels() != 2) {
+    return 0;
+  }
+
+  // Upmix mono to stereo.
+  // This is a very dumb mono to stereo upmixing, power levels are preserved
+  // following the calculation: left = right = -3dB*mono.
+  if (mIn.Format() == AudioConfig::FORMAT_FLT) {
+    const float m3db = std::sqrt(0.5); // -3dB = sqrt(1/2)
+    const float* in = static_cast<const float*>(aIn);
+    float* out = static_cast<float*>(aOut);
+    for (size_t fIdx = 0; fIdx < aFrames; ++fIdx) {
+      float sample = in[fIdx] * m3db;
+      // The samples of the buffer would be interleaved.
+      *out++ = sample;
+      *out++ = sample;
+    }
+  } else if (mIn.Format() == AudioConfig::FORMAT_S16) {
+    const int16_t* in = static_cast<const int16_t*>(aIn);
+    int16_t* out = static_cast<int16_t*>(aOut);
+    for (size_t fIdx = 0; fIdx < aFrames; ++fIdx) {
+      int16_t sample = ((int32_t)in[fIdx] * 11585) >> 14; // close enough to i*sqrt(0.5)
+      // The samples of the buffer would be interleaved.
+      *out++ = sample;
+      *out++ = sample;
+    }
+  } else {
+    MOZ_DIAGNOSTIC_ASSERT(false, "Unsupported data type");
+  }
+
+  return aFrames;
+}
+
+size_t
+AudioConverter::ResampleRecipientFrames(size_t aFrames) const
+{
+  if (!aFrames && mIn.Rate() != mOut.Rate()) {
+    // The resampler will be drained, account for frames currently buffered
+    // in the resampler.
+    if (!mResampler) {
+      return 0;
+    }
+    return speex_resampler_get_output_latency(mResampler);
+  } else {
+    return (uint64_t)aFrames * mOut.Rate() / mIn.Rate() + 1;
+  }
+}
+
+size_t
+AudioConverter::FramesOutToSamples(size_t aFrames) const
+{
+  return aFrames * mOut.Channels();
+}
+
+size_t
+AudioConverter::SamplesInToFrames(size_t aSamples) const
+{
+  return aSamples / mIn.Channels();
+}
+
+size_t
+AudioConverter::FramesOutToBytes(size_t aFrames) const
+{
+  return FramesOutToSamples(aFrames) * AudioConfig::SampleSize(mOut.Format());
+}
+} // namespace mozilla