Add more than 8 channel support to chromium

32ch_chromium.patch

From 40b2c9fb9e3104f437d9f9d420f48e456c788c92 Mon Sep 17 00:00:00 2001
From: Fabian-Robert Stoeter <mail@faroit.com>
Date: Fri, 17 Mar 2017 12:17:46 +0100
Subject: [PATCH] add support for more than 8channels

---
 media/base/channel_layout.cc | 10 ++++++++--
 media/base/channel_layout.h  |  2 +-
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/media/base/channel_layout.cc b/media/base/channel_layout.cc
index 7d3e754df..eff7157e8 100644
--- a/media/base/channel_layout.cc
+++ b/media/base/channel_layout.cc
@@ -166,6 +166,10 @@ int ChannelLayoutToChannelCount(ChannelLayout layout) {

 // Converts a channel count into a channel layout.
 ChannelLayout GuessChannelLayout(int channels) {
+  if (channels <= 0) {
+    DVLOG(1) << "Unsupported channel count: " << channels;
+    return CHANNEL_LAYOUT_UNSUPPORTED;
+  }
   switch (channels) {
     case 1:
       return CHANNEL_LAYOUT_MONO;
@@ -184,12 +188,14 @@ ChannelLayout GuessChannelLayout(int channels) {
     case 8:
       return CHANNEL_LAYOUT_7_1;
     default:
-      DVLOG(1) << "Unsupported channel count: " << channels;
+      return CHANNEL_LAYOUT_DISCRETE;
   }
-  return CHANNEL_LAYOUT_UNSUPPORTED;
 }

 int ChannelOrder(ChannelLayout layout, Channels channel) {
+  if (layout == CHANNEL_LAYOUT_DISCRETE)
+    return -1;
+
   DCHECK_LT(static_cast<size_t>(layout), arraysize(kChannelOrderings));
   DCHECK_LT(static_cast<size_t>(channel), arraysize(kChannelOrderings[0]));
   return kChannelOrderings[layout][channel];
diff --git a/media/base/channel_layout.h b/media/base/channel_layout.h
index aaecf6b9e..de3e892da 100644
--- a/media/base/channel_layout.h
+++ b/media/base/channel_layout.h
@@ -131,7 +131,7 @@ enum Channels {

 // The maximum number of concurrently active channels for all possible layouts.
 // ChannelLayoutToChannelCount() will never return a value higher than this.
-constexpr int kMaxConcurrentChannels = 8;
+constexpr int kMaxConcurrentChannels = 32;

 // Returns the expected channel position in an interleaved stream.  Values of -1
 // mean the channel at that index is not used for that layout.  Values range
--
2.11.0

args.gn

# Build arguments for release build
is_debug = false
is_component_build = false
is_official_build = true