Interfaces for encoded video sources

media/base/encoded_bitstream_buffer.cc

+// 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 "media/base/encoded_bitstream_buffer.h"
+
+#include <iomanip>
+
+#include "base/logging.h"
+#include "base/md5.h"
+#include "base/stringprintf.h"
+
+namespace media {
+
+EncodedBitstreamBuffer::EncodedBitstreamBuffer(
+    base::SharedMemoryHandle handle,
+    size_t size,
+    const media::BufferEncodingMetadata& metadata)
+    : shm_(new base::SharedMemory(handle, true)),

[Ami GONE FROM CHROMIUM, 2013/03/19 18:01:49]

Why is this a pointer and not a regular member?

[vmr, 2013/03/20 12:09:14]

No good reason. Changed to member variable.

+      size_(size),
+      metadata_(metadata) {
+  if (!shm_->Map(size_))

[Ami GONE FROM CHROMIUM, 2013/03/19 18:01:49]

CHECK-fail instead?

[vmr, 2013/03/20 12:09:14]

Done.

+    size_ = 0;
+}
+
+EncodedBitstreamBuffer::~EncodedBitstreamBuffer() {
+}
+
+const uint8* EncodedBitstreamBuffer::buffer() const {
+  return static_cast<const uint8*>(shm_->memory());

[Ami GONE FROM CHROMIUM, 2013/03/19 18:01:49]

s/static/reinterpret/

[vmr, 2013/03/20 12:09:14]

Done.

+}
+
+size_t EncodedBitstreamBuffer::size() const {
+  return size_;
+}
+
+media::BufferEncodingMetadata EncodedBitstreamBuffer::metadata() const {
+  return metadata_;
+}
+
+std::string EncodedBitstreamBuffer::ToDebugString() const {
+  std::string debug_string;
+  base::MD5Digest digest;
+  if (metadata_.frame_type_flags & media::kVP8KeyFrame) {
+    base::StringAppendF(&debug_string, "[I]");
+  } else {
+    base::StringAppendF(&debug_string, "[");
+    if (metadata_.frame_type_flags & media::kVP8GoldenFrame)
+      base::StringAppendF(&debug_string, "G");
+    if (metadata_.frame_type_flags & media::kVP8AltrefFrame)
+      base::StringAppendF(&debug_string, "A");
+    if (metadata_.droppable)
+      base::StringAppendF(&debug_string, "-");
+    if (!(metadata_.frame_type_flags & media::kVP8GoldenFrame) &&
+        !(metadata_.frame_type_flags & media::kVP8AltrefFrame) &&
+        !(metadata_.droppable))
+      base::StringAppendF(&debug_string, "P");
+    base::StringAppendF(&debug_string, "]");
+  }
+  base::StringAppendF(&debug_string, " tl: [%i", metadata_.temporal_layer_id);
+  if (metadata_.layer_sync)
+    base::StringAppendF(&debug_string, "S");
+  base::StringAppendF(&debug_string, "]");
+  base::StringAppendF(&debug_string,
+                      " time: %.2f",

[Ami GONE FROM CHROMIUM, 2013/03/19 18:01:49]

nit: 0.3 gets you milliseconds; not sure if we have any other logging-related
stuff that emits centi-seconds :)

[vmr, 2013/03/20 12:09:14]

Done.

+                      metadata_.timestamp.ToDoubleT());
+  base::StringAppendF(&debug_string, " (%lu bytes),", size());
+  base::MD5Sum(buffer(), size(), &digest);
+  base::StringAppendF(&debug_string,
+                      " %s",
+                      base::MD5DigestToBase16(digest).c_str());
+  return debug_string;
+}
+
+}  // namespace media
+