Add LayoutTests for MediaSource codec config changes.

LayoutTests/http/tests/media/resources/media-source/generate-config-change-tests.py

+#!/usr/bin/python
+# Copyright 2013 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");

[adamk, 2013/06/18 21:54:23]

Seems like this should use the standard Blink license. Unless it's imported from
somewhere?

[acolwell GONE FROM CHROMIUM, 2013/06/18 23:00:18]

Oops. Done. This is all my own code. I just had an ancestor of it in a different
personal repo so I had the other license.

+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+This is a script that generates the content and HTML files for Media Source
+codec config change LayoutTests.
+"""
+import json
+import os
+
+DURATION = 2
+FORMATS = ['webm', 'mp4']
+ENCODE_SETTINGS = [
+  ## Video-only files
+  # Frame rate changes
+  { 'fs': '320x240', 'fr': 24, 'kfr': 8, 'c': '#ff0000', 'vbr': 128, 'abr': 0, 'asr': 0, 'ach': 0, 'afreq': 0 },
+  { 'fs': '320x240', 'fr': 30, 'kfr': 10, 'c': '#ff0000', 'vbr': 128, 'abr': 0, 'asr': 0, 'ach': 0, 'afreq': 0 },
+  # Frame size change
+  { 'fs': '640x480', 'fr': 30, 'kfr': 10, 'c': '#00ff00', 'vbr': 128, 'abr': 0, 'asr': 0, 'ach': 0, 'afreq': 0 },
+  # Bitrate change
+  { 'fs': '320x240', 'fr': 30, 'kfr': 10, 'c': '#ff00ff', 'vbr': 256, 'abr': 0, 'asr': 0, 'ach': 0, 'afreq': 0 },
+
+  ## Audio-only files
+  # Bitrate/Codebook changes
+  { 'fs': '0x0', 'fr': 0, 'kfr': 0, 'c': '#000000', 'vbr': 0, 'abr': 128, 'asr': 44100, 'ach': 1, 'afreq': 2000 },
+  { 'fs': '0x0', 'fr': 0, 'kfr': 0, 'c': '#000000', 'vbr': 0, 'abr': 192, 'asr': 44100, 'ach': 1, 'afreq': 4000 },
+
+  ## Audio-Video files
+  # Frame size change.
+  { 'fs': '320x240', 'fr': 30, 'kfr': 10, 'c': '#ff0000', 'vbr': 256, 'abr': 128, 'asr': 44100, 'ach': 1, 'afreq': 2000 },
+  { 'fs': '640x480', 'fr': 30, 'kfr': 10, 'c': '#00ff00', 'vbr': 256, 'abr': 128, 'asr': 44100, 'ach': 1, 'afreq': 2000 },
+  # Audio bitrate change.
+  { 'fs': '640x480', 'fr': 30, 'kfr': 10, 'c': '#00ff00', 'vbr': 256, 'abr': 192, 'asr': 44100, 'ach': 1, 'afreq': 4000 },
+  # Video bitrate change.
+  { 'fs': '640x480', 'fr': 30, 'kfr': 10, 'c': '#00ffff', 'vbr': 512, 'abr': 128, 'asr': 44100, 'ach': 1, 'afreq': 2000 },
+]
+
+CONFIG_CHANGE_TESTS = [
+  ["v-framerate", 0, 1, "Tests %s video-only frame rate changes."],
+  ["v-framesize", 1, 2, "Tests %s video-only frame size changes."],
+  ["v-bitrate", 1, 3, "Tests %s video-only bitrate changes."],
+  ["a-bitrate", 4, 5, "Tests %s audio-only bitrate changes."],
+  ["av-framesize", 6, 7, "Tests %s frame size changes in multiplexed content."],
+  ["av-audio-bitrate", 7, 8, "Tests %s audio bitrate changes in multiplexed content."],
+  ["av-video-bitrate", 7, 9, "Tests %s video bitrate changes in multiplexed content."]
+];
+
+encoding_ids = []
+
+def Run(cmdline):
+  cmdlineStr = " ".join(cmdline)
+  print cmdlineStr
+  os.system(cmdlineStr)
+
+def GenerateManifest(filename, format, has_audio, has_video):
+
+  codecInfo = {
+      "mp4": { "audio": "mp4a.40.2", "video": "avc1.4D4001" },
+      "webm": { "audio": "vorbis", "video": "vp8" }
+  }
+
+  majorType = "audio"
+  if has_video :
+    majorType = "video"
+
+  codecs = []
+  if has_video:
+    codecs.append(codecInfo[format]["video"]);
+
+  if has_audio:
+    codecs.append(codecInfo[format]["audio"]);
+
+  type = "%s/%s;codecs=\"%s\"" % (majorType, format, ",".join(codecs))
+
+  manifest = { 'url': media_filename, 'type' : type}
+
+  f = open(filename, "wb")
+  f.write(json.dumps(manifest, indent=4, separators=(',', ': ')))
+  f.close()
+
+def GenerateTestHTML(format, config_change_tests, encoding_ids):
+  template = """<!DOCTYPE html>
+<html>
+    <head>
+        <script src="/w3c/resources/testharness.js"></script>
+        <script src="/w3c/resources/testharnessreport.js"></script>
+        <script src="mediasource-util.js"></script>
+        <script src="mediasource-config-changes.js"></script>
+        <link rel="stylesheet" href="/w3c/resources/testharness.css">
+    </head>
+    <body>
+        <div id="log"></div>
+        <script>
+            mediasource_configchange_test("%(format)s", "%(idA)s", "%(idB)s", "%(description)s");
+        </script>
+    </body>
+</html>
+"""
+  for test_info in config_change_tests :
+    filename = "../../media-source/mediasource-config-change-%s-%s.html" % (format, test_info[0])
+    html = template % {'format': format,
+                       'idA': encoding_ids[test_info[1]],
+                       'idB': encoding_ids[test_info[2]],
+                       'description':  test_info[3] % (format)}
+    f = open(filename, "wb")
+    f.write(html)
+    f.close()
+
+
+for format in FORMATS:
+  Run(["mkdir ",format])
+
+  for settings in ENCODE_SETTINGS:
+    video_bitrate = settings['vbr']
+    has_video = (video_bitrate > 0)
+
+    audio_bitrate = settings['abr']
+    has_audio = (audio_bitrate > 0)
+    bitrate = video_bitrate + audio_bitrate
+
+    frame_size = settings['fs']
+    frame_rate = settings['fr']
+    keyframe_rate = settings['kfr']
+    color = settings['c']
+
+    sample_rate = settings['asr']
+    channels = settings['ach']
+    frequency = settings['afreq']
+
+    cmdline = ["ffmpeg", "-y"]
+
+    id_prefix = ""
+    id_params = "";
+    if has_audio:
+      id_prefix += "a"
+      id_params += "-%sHz-%sch" % (sample_rate, channels)
+
+      channel_layout = "FC"
+      sin_func = "sin(%s*2*PI*t)" % frequency
+      func = sin_func
+      if channels == 2:
+        channel_layout += "|BC"
+        func += "|" + sin_func
+
+      cmdline += ["-f", "lavfi", "-i", "aevalsrc=\"%s:s=%s:c=%s:d=%s\"" % (func, sample_rate, channel_layout, DURATION)]
+
+    if has_video:
+      id_prefix += "v"
+      id_params += "-%s-%sfps-%skfr" % (frame_size, frame_rate, keyframe_rate)
+
+      cmdline += ["-f", "lavfi", "-i", "color=%s:duration=%s:size=%s:rate=%s" % (color, DURATION, frame_size, frame_rate)]
+
+    if has_audio:
+      cmdline += ["-b:a", "%sk" % audio_bitrate]
+
+    if has_video:
+      cmdline += ["-b:v", "%sk" % video_bitrate]
+      cmdline += ["-keyint_min", "%s" % keyframe_rate]
+      cmdline += ["-g", "%s" % keyframe_rate]
+
+
+      textOverlayInfo = "'drawtext=fontfile=Mono:fontsize=32:text=Time\\\\:\\\\ %{pts}"
+      textOverlayInfo += ",drawtext=fontfile=Mono:fontsize=32:y=32:text=Size\\\\:\\\\ %s" % (frame_size)
+      textOverlayInfo += ",drawtext=fontfile=Mono:fontsize=32:y=64:text=Bitrate\\\\:\\\\ %s" % (bitrate)
+      textOverlayInfo += ",drawtext=fontfile=Mono:fontsize=32:y=96:text=FrameRate\\\\:\\\\ %s" % (frame_rate)
+      textOverlayInfo += ",drawtext=fontfile=Mono:fontsize=32:y=128:text=KeyFrameRate\\\\:\\\\ %s" % (keyframe_rate)
+
+      if has_audio:
+        textOverlayInfo += ",drawtext=fontfile=Mono:fontsize=32:y=160:text=SampleRate\\\\:\\\\ %s" % (sample_rate)
+        textOverlayInfo += ",drawtext=fontfile=Mono:fontsize=32:y=192:text=Channels\\\\:\\\\ %s" % (channels)
+
+      textOverlayInfo += "'"
+      cmdline += ["-vf", textOverlayInfo]
+
+    encoding_id = "%s-%sk%s" % (id_prefix, bitrate, id_params)
+
+    if len(encoding_ids) < len(ENCODE_SETTINGS):
+      encoding_ids.append(encoding_id)
+
+    filename_base = "%s/test-%s" % (format, encoding_id)
+    media_filename = filename_base + "." + format
+    manifest_filename = filename_base + "-manifest.json"
+
+    cmdline.append(media_filename)
+    Run(cmdline)
+
+    # Remux file so it conforms to MSE bytestream requirements.
+    if format == "webm":
+      tmp_filename = media_filename + ".tmp"
+      Run(["mse_webm_remuxer", media_filename, tmp_filename])
+      Run(["mv", tmp_filename, media_filename])
+    elif format == "mp4":
+      Run(["MP4Box", "-dash", "250", "-rap", media_filename])
+      Run(["mv", filename_base + "_dash.mp4", media_filename])
+      Run(["rm", filename_base + "_dash.mpd"])
+
+    GenerateManifest(manifest_filename, format, has_audio, has_video)
+
+  GenerateTestHTML(format, CONFIG_CHANGE_TESTS, encoding_ids)