diff options
Diffstat (limited to 'en/devices/audio')
| -rw-r--r-- | en/devices/audio/attributes.html | 2 | ||||
| -rw-r--r-- | en/devices/audio/data_formats.html | 4 | ||||
| -rw-r--r-- | en/devices/audio/debugging.html | 69 | ||||
| -rw-r--r-- | en/devices/audio/latency_app.html | 2 | ||||
| -rw-r--r-- | en/devices/audio/midi.html | 2 | ||||
| -rw-r--r-- | en/devices/audio/midi_test.html | 6 | ||||
| -rw-r--r-- | en/devices/audio/tv.html | 26 | ||||
| -rw-r--r-- | en/devices/audio/usb.html | 10 | ||||
| -rw-r--r-- | en/devices/audio/warmup.html | 4 |
9 files changed, 66 insertions, 59 deletions
diff --git a/en/devices/audio/attributes.html b/en/devices/audio/attributes.html index b685e8bf..61825c00 100644 --- a/en/devices/audio/attributes.html +++ b/en/devices/audio/attributes.html @@ -135,7 +135,7 @@ audio attribute API</a>.</p> <p>In this example, AudioAttributes.Builder defines the AudioAttributes to be used by a new AudioTrack instance:</p> -<pre> +<pre class="devsite-click-to-copy"> AudioTrack myTrack = new AudioTrack( new AudioAttributes.Builder() .setUsage(AudioAttributes.USAGE_MEDIA) diff --git a/en/devices/audio/data_formats.html b/en/devices/audio/data_formats.html index e11a1abf..382c9567 100644 --- a/en/devices/audio/data_formats.html +++ b/en/devices/audio/data_formats.html @@ -118,7 +118,7 @@ for all signed fixed-point representations, so the following holds where all values are in units of one <a href="https://en.wikipedia.org/wiki/Least_significant_bit">LSB</a>: </p> -<pre> +<pre class="devsite-click-to-copy"> |largest negative value| = |largest positive value| + 1 </pre> @@ -306,7 +306,7 @@ To convert a value from Q<em>m</em>.<em>n</em> format to floating point: <p> For example, to convert a Q4.27 internal value to floating point, use: </p> -<pre> +<pre class="devsite-click-to-copy"> float = integer * (2 ^ -27) </pre> diff --git a/en/devices/audio/debugging.html b/en/devices/audio/debugging.html index 9f8efb79..67e23d03 100644 --- a/en/devices/audio/debugging.html +++ b/en/devices/audio/debugging.html @@ -50,30 +50,31 @@ For Android 7.x, replace <code>/data/misc/media</code> with <code>/data/misc/audioserver</code>. Additionally, you must use a userdebug or eng build. If you use a userdebug build, then disable verity with:</p> -<pre> -<code>$ adb root && adb disable-verity && adb reboot</code> + +<pre class="devsite-terminal devsite-click-to-copy"> +adb root && adb disable-verity && adb reboot </pre> <h3 id="compile">Compile-time setup</h3> <ol> -<li><code>$ cd frameworks/av/services/audioflinger</code></li> + <li><code class="devsite-terminal">cd frameworks/av/services/audioflinger</code></li> <li>Edit <code>Configuration.h</code>.</li> <li>Uncomment <code>#define TEE_SINK</code>.</li> <li>Re-build <code>libaudioflinger.so</code>.</li> -<li><code>$ adb root</code></li> -<li><code>$ adb remount</code></li> +<li><code class="devsite-terminal">adb root</code></li> +<li><code class="devsite-terminal">adb remount</code></li> <li>Push or sync the new <code>libaudioflinger.so</code> to the device's <code>/system/lib</code>.</li> </ol> <h3 id="runtime">Run-time setup</h3> <ol> -<li><code>$ adb shell getprop | grep ro.debuggable</code> +<li><code class="devsite-terminal">adb shell getprop | grep ro.debuggable</code> <br />Confirm that the output is: <code>[ro.debuggable]: [1]</code> </li> -<li><code>$ adb shell</code></li> -<li><code>$ ls -ld /data/misc/media</code> +<li><code class="devsite-terminal">adb shell</code></li> +<li><code class="devsite-terminal">ls -ld /data/misc/media</code> <br /> <p> Confirm that the output is: @@ -81,20 +82,19 @@ Confirm that the output is: <pre> drwx------ media media ... media </pre> -<br /> <p> If the directory does not exist, create it as follows: </p> -<pre> -$ mkdir /data/misc/media -$ chown media:media /data/misc/media +<pre class="devsite-click-to-copy"> +<code class="devsite-terminal">mkdir /data/misc/media</code> +<code class="devsite-terminal">chown media:media /data/misc/media</code> </pre> </li> -<li><code>$ echo af.tee=# > /data/local.prop</code> +<li><code class="devsite-terminal">echo af.tee=# > /data/local.prop</code> <br />Where the <code>af.tee</code> value is a number described below. </li> -<li><code>$ chmod 644 /data/local.prop</code></li> -<li><code>$ reboot</code></li> +<li><code class="devsite-terminal">chmod 644 /data/local.prop</code></li> +<li><code class="devsite-terminal">reboot</code></li> </ol> <h4>Values for <code>af.tee</code> property</h4> @@ -120,7 +120,7 @@ but you can get similar results using "4." <ol> <li>Run your audio test.</li> -<li><code>$ adb shell dumpsys media.audio_flinger</code></li> +<li><code class="devsite-terminal">adb shell dumpsys media.audio_flinger</code></li> <li>Look for a line in dumpsys output such as this:<br /> <code>tee copied to /data/misc/media/20131010101147_2.wav</code> <br />This is a PCM .wav file. @@ -165,10 +165,10 @@ Restore your build and device as follows: <li>Push or sync the restored <code>libaudioflinger.so</code> to the device's <code>/system/lib</code>. </li> -<li><code>$ adb shell</code></li> -<li><code>$ rm /data/local.prop</code></li> -<li><code>$ rm /data/misc/media/*.wav</code></li> -<li><code>$ reboot</code></li> +<li><code class="devsite-terminal">adb shell</code></li> +<li><code class="devsite-terminal">rm /data/local.prop</code></li> +<li><code class="devsite-terminal">rm /data/misc/media/*.wav</code></li> +<li><code class="devsite-terminal">reboot</code></li> </ol> <h2 id="mediaLog">media.log</h2> @@ -345,7 +345,7 @@ First, you need to add logs to your code. <p> In <code>FastMixer</code> and <code>FastCapture</code> threads, use code such as this: </p> -<pre> +<pre class="devsite-click-to-copy"> logWriter->log("string"); logWriter->logf("format", parameters); logWriter->logTimestamp(); @@ -359,7 +359,7 @@ there is no need for mutual exclusion. <p> In other AudioFlinger threads, use <code>mNBLogWriter</code>: </p> -<pre> +<pre class="devsite-click-to-copy"> mNBLogWriter->log("string"); mNBLogWriter->logf("format", parameters); mNBLogWriter->logTimestamp(); @@ -397,19 +397,19 @@ The full <code>NBLog</code> API is at <code>frameworks/av/include/media/nbaio/NB <code>ro.test_harness</code> is <code>1</code>. You can enable it by: </p> -<pre> -$ adb root -$ adb shell -$ echo ro.test_harness=1 > /data/local.prop -$ chmod 644 /data/local.prop -$ reboot +<pre class="devsite-click-to-copy"> +<code class="devsite-terminal">adb root</code> +<code class="devsite-terminal">adb shell</code> +<code class="devsite-terminal">echo ro.test_harness=1 > /data/local.prop</code> +<code class="devsite-terminal">chmod 644 /data/local.prop</code> +<code class="devsite-terminal">reboot</code> </pre> <p> The connection is lost during reboot, so: </p> -<pre> -$ adb shell +<pre class="devsite-terminal devsite-click-to-copy"> +adb shell </pre> The command <code>ps media</code> will now show two processes: @@ -427,8 +427,8 @@ Note the process ID of <code>mediaserver</code> for later. You can manually request a log dump at any time. This command shows logs from all the active and recent timelines, and then clears them: </p> -<pre> -$ dumpsys media.log +<pre class="devsite-terminal devsite-click-to-copy"> +dumpsys media.log </pre> <p> @@ -443,8 +443,9 @@ Now try killing <code>mediaserver</code> process: <code>kill -9 #</code>, where the process ID you noted earlier. You should see a dump from <code>media.log</code> in the main <code>logcat</code>, showing all the logs leading up to the crash. </p> -<pre> -$ dumpsys media.log + +<pre class="devsite-terminal devsite-click-to-copy"> +dumpsys media.log </pre> </body> diff --git a/en/devices/audio/latency_app.html b/en/devices/audio/latency_app.html index b4e7495b..61a1c56f 100644 --- a/en/devices/audio/latency_app.html +++ b/en/devices/audio/latency_app.html @@ -104,7 +104,7 @@ The document "OpenSL ES for Android" is provided in the NDK installation, and is not currently available online. Open this link in a browser: </p> -<pre> +<pre class="devsite-click-to-copy"> NDKroot/docs/Additional_library_docs/opensles/index.html </pre> diff --git a/en/devices/audio/midi.html b/en/devices/audio/midi.html index 31b55182..ecebb012 100644 --- a/en/devices/audio/midi.html +++ b/en/devices/audio/midi.html @@ -153,7 +153,7 @@ Applications can screen for the presence of MIDI support using the <p> To claim MIDI support, add this line to your <code>device.mk</code>: </p> -<pre> +<pre class="devsite-click-to-copy"> PRODUCT_COPY_FILES += \ frameworks/native/data/etc/android.software.midi.xml:system/etc/permissions/android.software.midi.xml </pre> diff --git a/en/devices/audio/midi_test.html b/en/devices/audio/midi_test.html index 303f0980..d6531f98 100644 --- a/en/devices/audio/midi_test.html +++ b/en/devices/audio/midi_test.html @@ -104,9 +104,9 @@ For example, to install the <em>MidiScope</em> app:</p> <li> On the workstation, enter:</li> </ol> -<pre> -cd <em><this-folder></em> -adb install -r MidiScope.apk +<pre class="devsite-click-to-copy"> +<code class="devsite-terminal">cd <var>THIS_FOLDER</var></code> +<code class="devsite-terminal">adb install -r MidiScope.apk</code> </pre> diff --git a/en/devices/audio/tv.html b/en/devices/audio/tv.html index 29c95bb5..61bdbe4e 100644 --- a/en/devices/audio/tv.html +++ b/en/devices/audio/tv.html @@ -73,12 +73,12 @@ of all the TV output (11Khz, 16bit mono or 48Khz, 16bit mono). Used only for aud <p>Android supports the following audio devices for TV audio input/output.</p> -<h4>system/media/audio/include/system/audio.h</h4> +<h4><code>system/media/audio/include/system/audio.h</code></h4> <p class="note"><strong>Note:</strong> In Android 5.1 and earlier, the path to this file is: <code>system/core/include/system/audio.h</code></p> -<pre> +<pre class="devsite-click-to-copy"> /* output devices */ AUDIO_DEVICE_OUT_AUX_DIGITAL = 0x400, AUDIO_DEVICE_OUT_HDMI = AUDIO_DEVICE_OUT_AUX_DIGITAL, @@ -101,12 +101,12 @@ AUDIO_DEVICE_IN_LOOPBACK = AUDIO_DEVICE_BIT_IN | 0x40000, <p>The Audio HAL extension for the audio routing API is defined by following:</p> -<h4>system/media/audio/include/system/audio.h</h4> +<h4><code>system/media/audio/include/system/audio.h</code></h4> <p class="note"><strong>Note:</strong> In Android 5.1 and earlier, the path to this file is: <code>system/core/include/system/audio.h</code></p> -<pre> +<pre class="devsite-click-to-copy"> /* audio port configuration structure used to specify a particular configuration of an audio port */ struct audio_port_config { audio_port_handle_t id; /* port unique ID */ @@ -144,9 +144,9 @@ struct audio_port { }; </pre> -<h4>hardware/libhardware/include/hardware/audio.h</h4> +<h4><code>hardware/libhardware/include/hardware/audio.h</code></h4> -<pre> +<pre class="devsite-click-to-copy"> struct audio_hw_device { : /** @@ -185,9 +185,9 @@ struct audio_hw_device { <p>To test DEVICE_IN_LOOPBACK for TV monitoring, use the following testing code. After running the test, the captured audio saves to <code>/sdcard/record_loopback.raw</code>, where you can listen to -it using <code>ffmeg</code>.</p> +it using <code><a href="https://en.wikipedia.org/wiki/FFmpeg">FFmpeg</a></code>.</p> -<pre> +<pre class="devsite-click-to-copy"> <uses-permission android:name="android.permission.MODIFY_AUDIO_ROUTING" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> @@ -267,12 +267,12 @@ it using <code>ffmeg</code>.</p> </pre> <p>Locate the captured audio file in <code>/sdcard/record_loopback.raw</code> and listen to it using -<code>ffmeg</code>:</p> +<code>FFmpeg</code>:</p> -<pre> -adb pull /sdcard/record_loopback.raw -ffmpeg -f s16le -ar 48k -ac 1 -i record_loopback.raw record_loopback.wav -ffplay record_loopback.wav +<pre class="devsite-click-to-copy"> +<code class="devsite-terminal">adb pull /sdcard/record_loopback.raw</code> +<code class="devsite-terminal">ffmpeg -f s16le -ar 48k -ac 1 -i record_loopback.raw record_loopback.wav</code> +<code class="devsite-terminal">ffplay record_loopback.wav</code> </pre> <h2 id="useCases">Use cases</h2> diff --git a/en/devices/audio/usb.html b/en/devices/audio/usb.html index f1c99ff6..d1dfcd3e 100644 --- a/en/devices/audio/usb.html +++ b/en/devices/audio/usb.html @@ -572,7 +572,9 @@ To enable USB audio, add an entry to the audio policy configuration file. This is typically located here: </p> -<pre>device/oem/codename/audio_policy.conf</pre> +<pre class="devsite-click-to-copy"> +device/oem/codename/audio_policy.conf +</pre> <p> The pathname component "oem" should be replaced by the name of the OEM who manufactures the Android device, @@ -583,7 +585,7 @@ and "codename" should be replaced by the device code name. An example entry is shown here: </p> -<pre> +<pre class="devsite-click-to-copy"> audio_hw_modules { ... usb { @@ -620,7 +622,9 @@ audio_hw_modules { The audio Hardware Abstraction Layer (HAL) implementation for USB audio is located here: </p> -<pre>hardware/libhardware/modules/usbaudio/</pre> +<pre class="devsite-click-to-copy"> +hardware/libhardware/modules/usbaudio/ +</pre> <p> The USB audio HAL relies heavily on <i>tinyalsa</i>, described at <a href="terminology.html">Audio Terminology</a>. diff --git a/en/devices/audio/warmup.html b/en/devices/audio/warmup.html index e139e2f4..7c37cd66 100644 --- a/en/devices/audio/warmup.html +++ b/en/devices/audio/warmup.html @@ -54,7 +54,9 @@ Layer (HAL) <code>write()</code> takes to stabilize. the hardware itself might have its own power logic beyond the three seconds that AudioFlinger has.</li> <li>Press Home, and you should hear a click sound.</li> <li>Run the following command to receive the measured warmup: - <br /><code>adb shell dumpsys media.audio_flinger | grep measuredWarmup</code> +<pre class="devsite-terminal devsite-click-to-copy"> +adb shell dumpsys media.audio_flinger | grep measuredWarmup +</pre> <p> You should see output like this: |