Add LayoutTests for MediaSource codec config changes.

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

+#!/usr/bin/python
+# Copyright (C) 2013 Google Inc. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""
+This is a script that generates the content and HTML files for Media Source
+codec config change LayoutTests.
+"""
+import json
+import os
+
+DURATION = 2
+MEDIA_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 },

[scherkus (not reviewing), 2013/06/19 00:10:30]

PEP-8 lists extraneous whitespace inside/around { } as unnecessary

[acolwell GONE FROM CHROMIUM, 2013/06/19 00:48:03]

Done.

+    { '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."]
+]
+
+def Run(cmd_line):

[scherkus (not reviewing), 2013/06/19 00:10:30]

PEP-8 says function names are unix_hacker not CamelCase:
I was pointed at http://b/8975606 but that won't be ready in the M28 timeframe.
Let me chase down a better answer...

here + rest of file (adamk@ feel free to correct me here!)

[acolwell GONE FROM CHROMIUM, 2013/06/19 00:48:03]

Done.

+    cmd_line_str = " ".join(cmd_line)
+    print cmd_line_str

[scherkus (not reviewing), 2013/06/19 00:10:30]

intentional or for debugging?

[acolwell GONE FROM CHROMIUM, 2013/06/19 00:48:03]

debugging. Removed.

+    os.system(cmd_line_str)
+
+def GenerateManifest(filename, media_filename, media_format, has_audio, has_video):
+    codecInfo = {
+        "mp4": { "audio": "mp4a.40.2", "video": "avc1.4D4001" },
+        "webm": { "audio": "vorbis", "video": "vp8" }
+    }
+
+    majorType = "audio"
+    if has_video :

[scherkus (not reviewing), 2013/06/19 00:10:30]

remove space before :

[acolwell GONE FROM CHROMIUM, 2013/06/19 00:48:03]

Done.

+        majorType = "video"
+
+    codecs = []
+    if has_video:
+        codecs.append(codecInfo[media_format]["video"])
+
+    if has_audio:
+        codecs.append(codecInfo[media_format]["audio"])
+
+    mimetype = "%s/%s;codecs=\"%s\"" % (majorType, media_format, ",".join(codecs))
+
+    manifest = { 'url': media_filename, 'type' : mimetype}
+
+    f = open(filename, "wb")
+    f.write(json.dumps(manifest, indent=4, separators=(',', ': ')))
+    f.close()
+
+def GenerateTestHTML(media_format, config_change_tests, encoding_ids):
+    template = """<!DOCTYPE html>

[scherkus (not reviewing), 2013/06/19 00:10:30]

make this a module-level constant?

[acolwell GONE FROM CHROMIUM, 2013/06/19 00:48:03]

Done.

+<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>
+            mediaSourceConfigChangeTest("%(media_format)s", "%(idA)s", "%(idB)s", "%(description)s");
+        </script>
+    </body>
+</html>
+"""
+    for test_info in config_change_tests :

[scherkus (not reviewing), 2013/06/19 00:10:30]

remove space

[acolwell GONE FROM CHROMIUM, 2013/06/19 00:48:03]

Done.

+        filename = "../../media-source/mediasource-config-change-%s-%s.html" % (media_format, test_info[0])
+        html = template % { 'media_format': media_format,
+                            'idA': encoding_ids[test_info[1]],
+                            'idB': encoding_ids[test_info[2]],
+                            'description':  test_info[3] % (media_format) }
+        f = open(filename, "wb")
+        f.write(html)
+        f.close()
+
+
+def GenerateContent():
+    encoding_ids = []
+
+    for media_format in MEDIA_FORMATS:
+        Run(["mkdir ", media_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" % (media_format, encoding_id)
+            media_filename = filename_base + "." + media_format
+            manifest_filename = filename_base + "-manifest.json"
+
+            cmdline.append(media_filename)
+            Run(cmdline)
+
+            # Remux file so it conforms to MSE bytestream requirements.
+            if media_format == "webm":
+                tmp_filename = media_filename + ".tmp"
+                Run(["mse_webm_remuxer", media_filename, tmp_filename])
+                Run(["mv", tmp_filename, media_filename])
+            elif media_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, media_filename, media_format, has_audio, has_video)
+        GenerateTestHTML(media_format, CONFIG_CHANGE_TESTS, encoding_ids)
+
+GenerateContent()

[scherkus (not reviewing), 2013/06/19 00:10:30]

isn't this usually guarded by a check for __main__?

[acolwell GONE FROM CHROMIUM, 2013/06/19 00:48:03]

Done. Copied what was in Tools/Scripts/check-blink-deps.