Migrate webkit/renderer/media/ to content/renderer/media/.

webkit/renderer/media/buffered_data_source.cc

Index: webkit/renderer/media/buffered_data_source.cc
diff --git a/webkit/renderer/media/buffered_data_source.cc b/webkit/renderer/media/buffered_data_source.cc
deleted file mode 100644
index 9644d1f0c44779e6d6da9f25e3970643dac0500d..0000000000000000000000000000000000000000
--- a/webkit/renderer/media/buffered_data_source.cc
+++ /dev/null
@@ -1,538 +0,0 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "webkit/renderer/media/buffered_data_source.h"
-
-#include "base/bind.h"
-#include "base/callback_helpers.h"
-#include "base/message_loop/message_loop_proxy.h"
-#include "media/base/media_log.h"
-#include "net/base/net_errors.h"
-
-using WebKit::WebFrame;
-
-namespace {
-
-// BufferedDataSource has an intermediate buffer, this value governs the initial
-// size of that buffer. It is set to 32KB because this is a typical read size
-// of FFmpeg.
-const int kInitialReadBufferSize = 32768;
-
-// Number of cache misses we allow for a single Read() before signaling an
-// error.
-const int kNumCacheMissRetries = 3;
-
-}  // namespace
-
-namespace webkit_media {
-
-class BufferedDataSource::ReadOperation {
- public:
-  ReadOperation(int64 position, int size, uint8* data,
-                const media::DataSource::ReadCB& callback);
-  ~ReadOperation();
-
-  // Runs |callback_| with the given |result|, deleting the operation
-  // afterwards.
-  static void Run(scoped_ptr<ReadOperation> read_op, int result);
-
-  // State for the number of times this read operation has been retried.
-  int retries() { return retries_; }
-  void IncrementRetries() { ++retries_; }
-
-  int64 position() { return position_; }
-  int size() { return size_; }
-  uint8* data() { return data_; }
-
- private:
-  int retries_;
-
-  const int64 position_;
-  const int size_;
-  uint8* data_;
-  media::DataSource::ReadCB callback_;
-
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ReadOperation);
-};
-
-BufferedDataSource::ReadOperation::ReadOperation(
-    int64 position, int size, uint8* data,
-    const media::DataSource::ReadCB& callback)
-    : retries_(0),
-      position_(position),
-      size_(size),
-      data_(data),
-      callback_(callback) {
-  DCHECK(!callback_.is_null());
-}
-
-BufferedDataSource::ReadOperation::~ReadOperation() {
-  DCHECK(callback_.is_null());
-}
-
-// static
-void BufferedDataSource::ReadOperation::Run(
-    scoped_ptr<ReadOperation> read_op, int result) {
-  base::ResetAndReturn(&read_op->callback_).Run(result);
-}
-
-BufferedDataSource::BufferedDataSource(
-    const scoped_refptr<base::MessageLoopProxy>& render_loop,
-    WebFrame* frame,
-    media::MediaLog* media_log,
-    const DownloadingCB& downloading_cb)
-    : weak_factory_(this),
-      weak_this_(weak_factory_.GetWeakPtr()),
-      cors_mode_(BufferedResourceLoader::kUnspecified),
-      total_bytes_(kPositionNotSpecified),
-      assume_fully_buffered_(false),
-      streaming_(false),
-      frame_(frame),
-      intermediate_read_buffer_(new uint8[kInitialReadBufferSize]),
-      intermediate_read_buffer_size_(kInitialReadBufferSize),
-      render_loop_(render_loop),
-      stop_signal_received_(false),
-      media_has_played_(false),
-      preload_(AUTO),
-      bitrate_(0),
-      playback_rate_(0.0),
-      media_log_(media_log),
-      downloading_cb_(downloading_cb) {
-  DCHECK(!downloading_cb_.is_null());
-}
-
-BufferedDataSource::~BufferedDataSource() {}
-
-// A factory method to create BufferedResourceLoader using the read parameters.
-// This method can be overridden to inject mock BufferedResourceLoader object
-// for testing purpose.
-BufferedResourceLoader* BufferedDataSource::CreateResourceLoader(
-    int64 first_byte_position, int64 last_byte_position) {
-  DCHECK(render_loop_->BelongsToCurrentThread());
-
-  BufferedResourceLoader::DeferStrategy strategy = preload_ == METADATA ?
-      BufferedResourceLoader::kReadThenDefer :
-      BufferedResourceLoader::kCapacityDefer;
-
-  return new BufferedResourceLoader(url_,
-                                    cors_mode_,
-                                    first_byte_position,
-                                    last_byte_position,
-                                    strategy,
-                                    bitrate_,
-                                    playback_rate_,
-                                    media_log_.get());
-}
-
-void BufferedDataSource::set_host(media::DataSourceHost* host) {
-  DataSource::set_host(host);
-
-  if (loader_) {
-    base::AutoLock auto_lock(lock_);
-    UpdateHostState_Locked();
-  }
-}
-
-void BufferedDataSource::Initialize(
-    const GURL& url,
-    BufferedResourceLoader::CORSMode cors_mode,
-    const InitializeCB& init_cb) {
-  DCHECK(render_loop_->BelongsToCurrentThread());
-  DCHECK(!init_cb.is_null());
-  DCHECK(!loader_.get());
-  url_ = url;
-  cors_mode_ = cors_mode;
-
-  init_cb_ = init_cb;
-
-  if (url_.SchemeIs(kHttpScheme) || url_.SchemeIs(kHttpsScheme)) {
-    // Do an unbounded range request starting at the beginning.  If the server
-    // responds with 200 instead of 206 we'll fall back into a streaming mode.
-    loader_.reset(CreateResourceLoader(0, kPositionNotSpecified));
-  } else {
-    // For all other protocols, assume they support range request. We fetch
-    // the full range of the resource to obtain the instance size because
-    // we won't be served HTTP headers.
-    loader_.reset(CreateResourceLoader(kPositionNotSpecified,
-                                       kPositionNotSpecified));
-    assume_fully_buffered_ = true;
-  }
-
-  loader_->Start(
-      base::Bind(&BufferedDataSource::StartCallback, weak_this_),
-      base::Bind(&BufferedDataSource::LoadingStateChangedCallback, weak_this_),
-      base::Bind(&BufferedDataSource::ProgressCallback, weak_this_),
-      frame_);
-}
-
-void BufferedDataSource::SetPreload(Preload preload) {
-  DCHECK(render_loop_->BelongsToCurrentThread());
-  preload_ = preload;
-}
-
-bool BufferedDataSource::HasSingleOrigin() {
-  DCHECK(render_loop_->BelongsToCurrentThread());
-  DCHECK(init_cb_.is_null() && loader_.get())
-      << "Initialize() must complete before calling HasSingleOrigin()";
-  return loader_->HasSingleOrigin();
-}
-
-bool BufferedDataSource::DidPassCORSAccessCheck() const {
-  return loader_.get() && loader_->DidPassCORSAccessCheck();
-}
-
-void BufferedDataSource::Abort() {
-  DCHECK(render_loop_->BelongsToCurrentThread());
-  {
-    base::AutoLock auto_lock(lock_);
-    StopInternal_Locked();
-  }
-  StopLoader();
-  frame_ = NULL;
-}
-
-/////////////////////////////////////////////////////////////////////////////
-// media::DataSource implementation.
-void BufferedDataSource::Stop(const base::Closure& closure) {
-  {
-    base::AutoLock auto_lock(lock_);
-    StopInternal_Locked();
-  }
-  closure.Run();
-
-  render_loop_->PostTask(FROM_HERE,
-      base::Bind(&BufferedDataSource::StopLoader, weak_this_));
-}
-
-void BufferedDataSource::SetPlaybackRate(float playback_rate) {
-  render_loop_->PostTask(FROM_HERE, base::Bind(
-      &BufferedDataSource::SetPlaybackRateTask, weak_this_, playback_rate));
-}
-
-void BufferedDataSource::SetBitrate(int bitrate) {
-  render_loop_->PostTask(FROM_HERE, base::Bind(
-      &BufferedDataSource::SetBitrateTask, weak_this_, bitrate));
-}
-
-void BufferedDataSource::Read(
-    int64 position, int size, uint8* data,
-    const media::DataSource::ReadCB& read_cb) {
-  DVLOG(1) << "Read: " << position << " offset, " << size << " bytes";
-  DCHECK(!read_cb.is_null());
-
-  {
-    base::AutoLock auto_lock(lock_);
-    DCHECK(!read_op_);
-
-    if (stop_signal_received_) {
-      read_cb.Run(kReadError);
-      return;
-    }
-
-    read_op_.reset(new ReadOperation(position, size, data, read_cb));
-  }
-
-  render_loop_->PostTask(FROM_HERE, base::Bind(
-      &BufferedDataSource::ReadTask, weak_this_));
-}
-
-bool BufferedDataSource::GetSize(int64* size_out) {
-  if (total_bytes_ != kPositionNotSpecified) {
-    *size_out = total_bytes_;
-    return true;
-  }
-  *size_out = 0;
-  return false;
-}
-
-bool BufferedDataSource::IsStreaming() {
-  return streaming_;
-}
-
-/////////////////////////////////////////////////////////////////////////////
-// Render thread tasks.
-void BufferedDataSource::ReadTask() {
-  DCHECK(render_loop_->BelongsToCurrentThread());
-  ReadInternal();
-}
-
-void BufferedDataSource::StopInternal_Locked() {
-  lock_.AssertAcquired();
-  if (stop_signal_received_)
-    return;
-
-  stop_signal_received_ = true;
-
-  // Initialize() isn't part of the DataSource interface so don't call it in
-  // response to Stop().
-  init_cb_.Reset();
-
-  if (read_op_)
-    ReadOperation::Run(read_op_.Pass(), kReadError);
-}
-
-void BufferedDataSource::StopLoader() {
-  DCHECK(render_loop_->BelongsToCurrentThread());
-
-  if (loader_)
-    loader_->Stop();
-}
-
-void BufferedDataSource::SetPlaybackRateTask(float playback_rate) {
-  DCHECK(render_loop_->BelongsToCurrentThread());
-  DCHECK(loader_.get());
-
-  if (playback_rate != 0)
-    media_has_played_ = true;
-
-  playback_rate_ = playback_rate;
-  loader_->SetPlaybackRate(playback_rate);
-
-  if (!loader_->range_supported()) {
-    // 200 responses end up not being reused to satisfy future range requests,
-    // and we don't want to get too far ahead of the read-head (and thus require
-    // a restart), so keep to the thresholds.
-    loader_->UpdateDeferStrategy(BufferedResourceLoader::kCapacityDefer);
-  } else if (media_has_played_ && playback_rate == 0) {
-    // If the playback has started (at which point the preload value is ignored)
-    // and we're paused, then try to load as much as possible (the loader will
-    // fall back to kCapacityDefer if it knows the current response won't be
-    // useful from the cache in the future).
-    loader_->UpdateDeferStrategy(BufferedResourceLoader::kNeverDefer);
-  } else {
-    // If media is currently playing or the page indicated preload=auto,
-    // use threshold strategy to enable/disable deferring when the buffer
-    // is full/depleted.
-    loader_->UpdateDeferStrategy(BufferedResourceLoader::kCapacityDefer);
-  }
-}
-
-void BufferedDataSource::SetBitrateTask(int bitrate) {
-  DCHECK(render_loop_->BelongsToCurrentThread());
-  DCHECK(loader_.get());
-
-  bitrate_ = bitrate;
-  loader_->SetBitrate(bitrate);
-}
-
-// This method is the place where actual read happens, |loader_| must be valid
-// prior to make this method call.
-void BufferedDataSource::ReadInternal() {
-  DCHECK(render_loop_->BelongsToCurrentThread());
-  int64 position = 0;
-  int size = 0;
-  {
-    base::AutoLock auto_lock(lock_);
-    if (stop_signal_received_)
-      return;
-
-    position = read_op_->position();
-    size = read_op_->size();
-  }
-
-  // First we prepare the intermediate read buffer for BufferedResourceLoader
-  // to write to.
-  if (size > intermediate_read_buffer_size_) {
-    intermediate_read_buffer_.reset(new uint8[size]);
-  }
-
-  // Perform the actual read with BufferedResourceLoader.
-  loader_->Read(
-      position, size, intermediate_read_buffer_.get(),
-      base::Bind(&BufferedDataSource::ReadCallback, weak_this_));
-}
-
-
-/////////////////////////////////////////////////////////////////////////////
-// BufferedResourceLoader callback methods.
-void BufferedDataSource::StartCallback(
-    BufferedResourceLoader::Status status) {
-  DCHECK(render_loop_->BelongsToCurrentThread());
-  DCHECK(loader_.get());
-
-  bool init_cb_is_null = false;
-  {
-    base::AutoLock auto_lock(lock_);
-    init_cb_is_null = init_cb_.is_null();
-  }
-  if (init_cb_is_null) {
-    loader_->Stop();
-    return;
-  }
-
-  // All responses must be successful. Resources that are assumed to be fully
-  // buffered must have a known content length.
-  bool success = status == BufferedResourceLoader::kOk &&
-      (!assume_fully_buffered_ ||
-       loader_->instance_size() != kPositionNotSpecified);
-
-  if (success) {
-    total_bytes_ = loader_->instance_size();
-    streaming_ = !assume_fully_buffered_ &&
-        (total_bytes_ == kPositionNotSpecified || !loader_->range_supported());
-  } else {
-    loader_->Stop();
-  }
-
-  // TODO(scherkus): we shouldn't have to lock to signal host(), see
-  // http://crbug.com/113712 for details.
-  base::AutoLock auto_lock(lock_);
-  if (stop_signal_received_)
-    return;
-
-  if (success)
-    UpdateHostState_Locked();
-
-  base::ResetAndReturn(&init_cb_).Run(success);
-}
-
-void BufferedDataSource::PartialReadStartCallback(
-    BufferedResourceLoader::Status status) {
-  DCHECK(render_loop_->BelongsToCurrentThread());
-  DCHECK(loader_.get());
-
-  if (status == BufferedResourceLoader::kOk) {
-    // Once the request has started successfully, we can proceed with
-    // reading from it.
-    ReadInternal();
-    return;
-  }
-
-  // Stop the resource loader since we have received an error.
-  loader_->Stop();
-
-  // TODO(scherkus): we shouldn't have to lock to signal host(), see
-  // http://crbug.com/113712 for details.
-  base::AutoLock auto_lock(lock_);
-  if (stop_signal_received_)
-    return;
-  ReadOperation::Run(read_op_.Pass(), kReadError);
-}
-
-void BufferedDataSource::ReadCallback(
-    BufferedResourceLoader::Status status,
-    int bytes_read) {
-  DCHECK(render_loop_->BelongsToCurrentThread());
-
-  // TODO(scherkus): we shouldn't have to lock to signal host(), see
-  // http://crbug.com/113712 for details.
-  base::AutoLock auto_lock(lock_);
-  if (stop_signal_received_)
-    return;
-
-  if (status != BufferedResourceLoader::kOk) {
-    // Stop the resource load if it failed.
-    loader_->Stop();
-
-    if (status == BufferedResourceLoader::kCacheMiss &&
-        read_op_->retries() < kNumCacheMissRetries) {
-      read_op_->IncrementRetries();
-
-      // Recreate a loader starting from where we last left off until the
-      // end of the resource.
-      loader_.reset(CreateResourceLoader(
-          read_op_->position(), kPositionNotSpecified));
-      loader_->Start(
-          base::Bind(&BufferedDataSource::PartialReadStartCallback, weak_this_),
-          base::Bind(&BufferedDataSource::LoadingStateChangedCallback,
-                     weak_this_),
-          base::Bind(&BufferedDataSource::ProgressCallback, weak_this_),
-          frame_);
-      return;
-    }
-
-    ReadOperation::Run(read_op_.Pass(), kReadError);
-    return;
-  }
-
-  if (bytes_read > 0) {
-    memcpy(read_op_->data(), intermediate_read_buffer_.get(), bytes_read);
-  } else if (bytes_read == 0 && total_bytes_ == kPositionNotSpecified) {
-    // We've reached the end of the file and we didn't know the total size
-    // before. Update the total size so Read()s past the end of the file will
-    // fail like they would if we had known the file size at the beginning.
-    total_bytes_ = loader_->instance_size();
-
-    if (host() && total_bytes_ != kPositionNotSpecified) {
-      host()->SetTotalBytes(total_bytes_);
-      host()->AddBufferedByteRange(loader_->first_byte_position(),
-                                   total_bytes_);
-    }
-  }
-  ReadOperation::Run(read_op_.Pass(), bytes_read);
-}
-
-void BufferedDataSource::LoadingStateChangedCallback(
-    BufferedResourceLoader::LoadingState state) {
-  DCHECK(render_loop_->BelongsToCurrentThread());
-
-  if (assume_fully_buffered_)
-    return;
-
-  bool is_downloading_data;
-  switch (state) {
-    case BufferedResourceLoader::kLoading:
-      is_downloading_data = true;
-      break;
-    case BufferedResourceLoader::kLoadingDeferred:
-    case BufferedResourceLoader::kLoadingFinished:
-      is_downloading_data = false;
-      break;
-
-    // TODO(scherkus): we don't signal network activity changes when loads
-    // fail to preserve existing behaviour when deferring is toggled, however
-    // we should consider changing DownloadingCB to also propagate loading
-    // state. For example there isn't any signal today to notify the client that
-    // loading has failed (we only get errors on subsequent reads).
-    case BufferedResourceLoader::kLoadingFailed:
-      return;
-  }
-
-  downloading_cb_.Run(is_downloading_data);
-}
-
-void BufferedDataSource::ProgressCallback(int64 position) {
-  DCHECK(render_loop_->BelongsToCurrentThread());
-
-  if (assume_fully_buffered_)
-    return;
-
-  // TODO(scherkus): we shouldn't have to lock to signal host(), see
-  // http://crbug.com/113712 for details.
-  base::AutoLock auto_lock(lock_);
-  if (stop_signal_received_)
-    return;
-
-  ReportOrQueueBufferedBytes(loader_->first_byte_position(), position);
-}
-
-void BufferedDataSource::ReportOrQueueBufferedBytes(int64 start, int64 end) {
-  if (host())
-    host()->AddBufferedByteRange(start, end);
-  else
-    queued_buffered_byte_ranges_.Add(start, end);
-}
-
-void BufferedDataSource::UpdateHostState_Locked() {
-  lock_.AssertAcquired();
-
-  if (!host())
-    return;
-
-  for (size_t i = 0; i < queued_buffered_byte_ranges_.size(); ++i) {
-    host()->AddBufferedByteRange(queued_buffered_byte_ranges_.start(i),
-                                 queued_buffered_byte_ranges_.end(i));
-  }
-  queued_buffered_byte_ranges_.clear();
-
-  if (total_bytes_ == kPositionNotSpecified)
-    return;
-
-  host()->SetTotalBytes(total_bytes_);
-
-  if (assume_fully_buffered_)
-    host()->AddBufferedByteRange(0, total_bytes_);
-}
-
-}  // namespace webkit_media