From 1b1a81a5f2319049c50098a8186fdf214383c54e Mon Sep 17 00:00:00 2001
From: John Stultz <john.stultz@linaro.org>
Date: Tue, 27 Jul 2021 05:38:32 +0000
Subject: db845c: Enabling usb camera

Following:
  https://source.android.com/devices/camera/external-usb-cameras

With a number of additions (like sepolicy, and permissions), in order
to get it going.

This patch also adds a very simple media_profiles.xml implementation
which works for video recording, but adds an iffy vga (640x480) entry
calling it 480p. We will likely need to tweak all this quite a bit
when we add real hwcodec support or onboard camera support.

Change-Id: I9db300d9eadd9246d5f1fbab40d1fcbe33336961
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
 device-common.mk               |  11 ++++
 etc/external_camera_config.xml |  28 ++++++++++
 etc/media_profiles.xml         | 118 +++++++++++++++++++++++++++++++++++++++++
 manifest.xml                   |  10 ++++
 sepolicy/hal_camera.te         |  15 ++++++
 ueventd.common.rc              |   4 ++
 6 files changed, 186 insertions(+)
 create mode 100644 etc/external_camera_config.xml
 create mode 100644 etc/media_profiles.xml
 create mode 100644 sepolicy/hal_camera.te

diff --git a/device-common.mk b/device-common.mk
index 718d398..82d4b25 100644
--- a/device-common.mk
+++ b/device-common.mk
@@ -167,6 +167,17 @@ PRODUCT_COPY_FILES += \
 PRODUCT_COPY_FILES +=  \
         device/linaro/dragonboard/etc/permissions/android.software.xml:$(TARGET_COPY_OUT_VENDOR)/etc/permissions/android.software.xml
 
+
+# External Web Cam support
+PRODUCT_PACKAGES += \
+	android.hardware.camera.provider@2.4-impl \
+	android.hardware.camera.provider@2.4-external-service
+
+PRODUCT_COPY_FILES += \
+    frameworks/native/data/etc/android.hardware.camera.front.xml:$(TARGET_COPY_OUT_VENDOR)/etc/permissions/android.hardware.camera.front.xml \
+    $(LOCAL_PATH)/etc/media_profiles.xml:$(TARGET_COPY_OUT_VENDOR)/etc/media_profiles_V1_0.xml \
+    $(LOCAL_PATH)/etc/external_camera_config.xml:$(TARGET_COPY_OUT_VENDOR)/etc/external_camera_config.xml
+
 # Keymaster
 PRODUCT_PACKAGES += \
     android.hardware.keymaster@3.0-impl \
diff --git a/etc/external_camera_config.xml b/etc/external_camera_config.xml
new file mode 100644
index 0000000..991ff40
--- /dev/null
+++ b/etc/external_camera_config.xml
@@ -0,0 +1,28 @@
+<ExternalCamera>
+    <Provider>
+        <ignore> <!-- Internal video devices to be ignored by external camera HAL -->
+        </ignore>
+    </Provider>
+    <!-- See ExternalCameraUtils.cpp for default values of Device configurations below -->
+    <Device>
+        <!-- Max JPEG buffer size in bytes-->
+        <MaxJpegBufferSize bytes="3145728"/> <!-- 3MB (~= 1080p YUV420) -->
+        <!-- Size of v4l2 buffer queue when streaming >= 30fps -->
+        <!-- Larger value: more request can be cached pipeline (less janky)  -->
+        <!-- Smaller value: use less memory -->
+        <NumVideoBuffers count="4"/>
+        <!-- Size of v4l2 buffer queue when streaming < 30fps -->
+        <NumStillBuffers count="2"/>
+
+        <!-- List of maximum fps for various output sizes -->
+        <!-- Any image size smaller than the size listed in Limit row will report
+            fps (as minimum frame duration) up to the fpsBound value. -->
+        <FpsList>
+            <!-- width/height must be increasing, fpsBound must be decreasing-->
+            <Limit width="640" height="480" fpsBound="30.0"/>
+            <Limit width="1280" height="720" fpsBound="15.0"/>
+            <Limit width="1920" height="1080" fpsBound="10.0"/>
+            <!-- image size larger than the last entry will not be supported-->
+        </FpsList>
+    </Device>
+</ExternalCamera>
diff --git a/etc/media_profiles.xml b/etc/media_profiles.xml
new file mode 100644
index 0000000..2ffb7a3
--- /dev/null
+++ b/etc/media_profiles.xml
@@ -0,0 +1,118 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+** Copyright 2017, The Android Open Source Project.
+**
+** Licensed under the Apache License, Version 2.0 (the "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.
+*/
+-->
+<!DOCTYPE MediaSettings SYSTEM "/system/etc/media_profiles_V1_0.dtd">
+<MediaSettings>
+    <!-- Each camcorder profile defines a set of predefined configuration parameters -->
+    <CamcorderProfiles cameraId="0">
+	<!-- Iffy! Lets pretend vga (640x480) is 480p! -->
+        <EncoderProfile quality="480p" fileFormat="mp4" duration="30">
+            <Video codec="h264"
+                   bitRate="6000000"
+                   width="640"
+                   height="480"
+                   frameRate="30" />
+            <Audio codec="amrnb"
+                   bitRate="12200"
+                   sampleRate="8000"
+                   channels="1" />
+        </EncoderProfile>
+
+        <EncoderProfile quality="qvga" fileFormat="mp4" duration="60">
+            <Video codec="h264"
+                   bitRate="128000"
+                   width="320"
+                   height="240"
+                   frameRate="30" />
+            <Audio codec="amrnb"
+                   bitRate="12200"
+                   sampleRate="8000"
+                   channels="1" />
+        </EncoderProfile>
+
+        <EncoderProfile quality="timelapseqcif" fileFormat="mp4" duration="30">
+            <Video codec="h264"
+                   bitRate="192000"
+                   width="176"
+                   height="144"
+                   frameRate="30" />
+            <!-- audio setting is ignored -->
+            <Audio codec="amrnb"
+                   bitRate="12200"
+                   sampleRate="8000"
+                   channels="1" />
+        </EncoderProfile>
+
+        <ImageEncoding quality="95" />
+        <ImageEncoding quality="80" />
+        <ImageEncoding quality="70" />
+        <ImageDecoding memCap="20000000" />
+
+    </CamcorderProfiles>
+
+    <EncoderOutputFileFormat name="3gp" />
+    <EncoderOutputFileFormat name="mp4" />
+
+    <!--
+         If a codec is not enabled, it is invisible to the applications
+         In other words, the applications won't be able to use the codec
+         or query the capabilities of the codec at all if it is disabled
+    -->
+    <VideoEncoderCap name="h264" enabled="true"
+        minBitRate="64000" maxBitRate="12000000"
+        minFrameWidth="176" maxFrameWidth="1280"
+        minFrameHeight="144" maxFrameHeight="720"
+        minFrameRate="15" maxFrameRate="30" />
+
+    <VideoEncoderCap name="h263" enabled="true"
+        minBitRate="64000" maxBitRate="12000000"
+        minFrameWidth="176" maxFrameWidth="1280"
+        minFrameHeight="144" maxFrameHeight="720"
+        minFrameRate="15" maxFrameRate="30" />
+
+    <VideoEncoderCap name="m4v" enabled="true"
+        minBitRate="64000" maxBitRate="12000000"
+        minFrameWidth="176" maxFrameWidth="1280"
+        minFrameHeight="144" maxFrameHeight="720"
+        minFrameRate="15" maxFrameRate="30" />
+
+    <AudioEncoderCap name="aac" enabled="true"
+        minBitRate="8000" maxBitRate="96000"
+        minSampleRate="8000" maxSampleRate="48000"
+        minChannels="1" maxChannels="1" />
+
+    <AudioEncoderCap name="amrwb" enabled="true"
+        minBitRate="6600" maxBitRate="23050"
+        minSampleRate="16000" maxSampleRate="16000"
+        minChannels="1" maxChannels="1" />
+
+    <AudioEncoderCap name="amrnb" enabled="true"
+        minBitRate="5525" maxBitRate="12200"
+        minSampleRate="8000" maxSampleRate="8000"
+        minChannels="1" maxChannels="1" />
+
+    <!--
+        FIXME:
+        We do not check decoder capabilities at present
+        At present, we only check whether windows media is visible
+        for TEST applications. For other applications, we do
+        not perform any checks at all.
+    -->
+    <VideoDecoderCap name="wmv" enabled="false"/>
+    <AudioDecoderCap name="wma" enabled="false"/>
+</MediaSettings>
diff --git a/manifest.xml b/manifest.xml
index 910ec90..5f62e28 100644
--- a/manifest.xml
+++ b/manifest.xml
@@ -35,6 +35,16 @@
             <instance>default</instance>
         </interface>
     </hal>
+    <hal format="hidl">
+        <name>android.hardware.camera.provider</name>
+        <transport>hwbinder</transport>
+        <impl level="generic"></impl>
+        <version>2.4</version>
+        <interface>
+            <name>ICameraProvider</name>
+            <instance>external/0</instance>
+        </interface>
+    </hal>
     <hal format="hidl">
         <name>android.hardware.drm</name>
         <transport>hwbinder</transport>
diff --git a/sepolicy/hal_camera.te b/sepolicy/hal_camera.te
new file mode 100644
index 0000000..6bbc346
--- /dev/null
+++ b/sepolicy/hal_camera.te
@@ -0,0 +1,15 @@
+vndbinder_use(hal_camera_default);
+
+allow hal_camera_default hal_graphics_mapper_hwservice:hwservice_manager find;
+hal_client_domain(hal_camera_default, hal_graphics_allocator);
+hal_client_domain(hal_camera_default, hal_graphics_composer);
+
+# for external camera
+allow cameraserver device:dir r_dir_perms;
+allow cameraserver video_device:dir r_dir_perms;
+allow cameraserver video_device:chr_file rw_file_perms;
+
+allow hal_camera_default gpu_device:chr_file { open read write ioctl map getattr };
+allow hal_camera_default dri_device:dir { open read search };
+allow cameraserver dri_device:dir { open read write search getattr };
+allow cameraserver gpu_device:chr_file { open read write ioctl map getattr };
diff --git a/ueventd.common.rc b/ueventd.common.rc
index c0ba022..3e396f6 100644
--- a/ueventd.common.rc
+++ b/ueventd.common.rc
@@ -11,3 +11,7 @@ subsystem usbmisc
 
 # media.codec2
 /dev/ion 0664 system system
+
+# usb webcam?
+/dev/video0 0660 system camera
+/dev/video1 0660 system camera
-- 
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