commit b01c7816a8c4ef34102ead1a3eca4f389e7a8f43
author ossu <ossu@webrtc.org> Wed Feb 24 09:05:56 2016
committer Commit bot <commit-bot@chromium.org> Wed Feb 24 09:06:02 2016
tree 904ae6abbbd90aafd5ce4239af8033ef2b85c9e2
parent 17849fcc8bf22004ab111f61c5e261c39efc24d4

Added functional variants of Buffer::SetData and Buffer::AppendData.

They are invoked with the maximum size of the data to be added, and a
callable that generates that data, like this:

buffer.AppendData(10, [] (rtc::ArrayView<uint8_t> av) {
    for (uint8_t i = 0; i != 5; ++i)
      av[i] = i;

    return 5;
  });

The callable returns the number of bytes actually written, and the
final Buffer size will be adjusted accordingly. SetData and AppendData
both return the number of bytes added (i.e. the return value of the
callable).

These versions will be useful when converting AudioEncoder::Encode to use Buffer rather than raw pointers.

Also added a few tests for the new functionality.

Review URL: https://codereview.webrtc.org/1717273002

Cr-Commit-Position: refs/heads/master@{#11733}