Added a more detailed diagram

Also edit a bit an existing diagram to show that multiple hals can live
together.

Change-Id: I95a60cef7fccd0caf05e27dbeee5ff51318c9aab
Signed-off-by: Loïc Collignon <loic.collignon@iot.bzh>

4 files changed, 653 insertions, 122 deletions

diff --git a/docs/4a-framework/README.md b/docs/4a-framework/README.md
index 90de65b..c9a7d8f 100644
--- a/docs/4a-framework/README.md
+++ b/docs/4a-framework/README.md
@@ -12,6 +12,10 @@ like **alsa** or **pulseaudio**.
 
 ### Global architecture
 
+![applications architecture diagram](images/agl-audio-arch.png)
+
+This detailed diagram shows the interactions between all components.
+
 ![applications architecture diagram](images/apps-architecture.svg)
 
 This diagram shows the global architecture that any application playing audio
diff --git a/docs/4a-framework/images/4a-architecture.svg b/docs/4a-framework/images/4a-architecture.svg
index 1554e8e..c671cfb 100644
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+++ b/docs/4a-framework/images/4a-architecture.svg
@@ -1,155 +1,681 @@
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