├── app
├── .gitignore
├── src
│ ├── main
│ │ ├── assets
│ │ │ └── test.wav
│ │ ├── res
│ │ │ ├── mipmap-hdpi
│ │ │ │ └── ic_launcher.png
│ │ │ ├── mipmap-mdpi
│ │ │ │ └── ic_launcher.png
│ │ │ ├── mipmap-xhdpi
│ │ │ │ └── ic_launcher.png
│ │ │ ├── mipmap-xxhdpi
│ │ │ │ └── ic_launcher.png
│ │ │ ├── values
│ │ │ │ ├── strings.xml
│ │ │ │ ├── styles.xml
│ │ │ │ └── dimens.xml
│ │ │ ├── values-w820dp
│ │ │ │ └── dimens.xml
│ │ │ ├── menu
│ │ │ │ └── menu_main.xml
│ │ │ └── layout
│ │ │ │ └── activity_main.xml
│ │ ├── AndroidManifest.xml
│ │ └── java
│ │ │ └── com
│ │ │ └── semantive
│ │ │ └── pcm_encoder
│ │ │ ├── MainActivity.java
│ │ │ └── PCMEncoder.java
│ └── androidTest
│ │ └── java
│ │ └── com
│ │ └── semantive
│ │ └── pcm_encoder
│ │ └── ApplicationTest.java
├── build.gradle
├── proguard-rules.pro
└── app.iml
├── settings.gradle
├── gradle
└── wrapper
│ ├── gradle-wrapper.jar
│ └── gradle-wrapper.properties
├── .gitignore
├── README.md
├── gradle.properties
├── pcm-encoder.iml
├── gradlew.bat
└── gradlew
/app/.gitignore:
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1 | /build
2 |
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/settings.gradle:
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1 | include ':app'
2 |
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/app/src/main/assets/test.wav:
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https://raw.githubusercontent.com/Semantive/pcm-encoder/HEAD/app/src/main/assets/test.wav
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/gradle/wrapper/gradle-wrapper.jar:
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https://raw.githubusercontent.com/Semantive/pcm-encoder/HEAD/gradle/wrapper/gradle-wrapper.jar
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/.gitignore:
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1 | .gradle
2 | /local.properties
3 | /.idea/workspace.xml
4 | /.idea/libraries
5 | .DS_Store
6 | /build
7 | /captures
8 |
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/app/src/main/res/mipmap-hdpi/ic_launcher.png:
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https://raw.githubusercontent.com/Semantive/pcm-encoder/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher.png
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/app/src/main/res/mipmap-mdpi/ic_launcher.png:
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https://raw.githubusercontent.com/Semantive/pcm-encoder/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher.png
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/app/src/main/res/mipmap-xhdpi/ic_launcher.png:
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https://raw.githubusercontent.com/Semantive/pcm-encoder/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher.png
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/app/src/main/res/mipmap-xxhdpi/ic_launcher.png:
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https://raw.githubusercontent.com/Semantive/pcm-encoder/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
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/app/src/main/res/values/strings.xml:
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1 |
2 | pcm-encoder
3 |
4 | Hello world!
5 | Settings
6 |
7 |
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/app/src/main/res/values/styles.xml:
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1 |
2 |
3 |
4 |
7 |
8 |
9 |
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/app/src/main/res/values/dimens.xml:
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1 |
2 |
3 | 16dp
4 | 16dp
5 |
6 |
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/gradle/wrapper/gradle-wrapper.properties:
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1 | #Wed Apr 10 15:27:10 PDT 2013
2 | distributionBase=GRADLE_USER_HOME
3 | distributionPath=wrapper/dists
4 | zipStoreBase=GRADLE_USER_HOME
5 | zipStorePath=wrapper/dists
6 | distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-all.zip
7 |
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/app/src/main/res/values-w820dp/dimens.xml:
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1 |
2 |
5 | 64dp
6 |
7 |
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/app/src/main/res/menu/menu_main.xml:
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1 |
10 |
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/app/src/androidTest/java/com/semantive/pcm_encoder/ApplicationTest.java:
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1 | package com.semantive.pcm_encoder;
2 |
3 | import android.app.Application;
4 | import android.test.ApplicationTestCase;
5 |
6 | /**
7 | * Testing Fundamentals
8 | */
9 | public class ApplicationTest extends ApplicationTestCase {
10 | public ApplicationTest() {
11 | super(Application.class);
12 | }
13 | }
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/README.md:
--------------------------------------------------------------------------------
1 | # pcm-encoder
2 | Simple PCM to MP4 encoder for Android
3 |
4 | PCMEncoder provides simple API for concatenating multiple PCM streams into one, encoded MP4 file on Android devices. It uses MediaMuxer, MediaCodec and MediaFormat, which are available since Android API 18.
5 |
6 | Usage:
7 | ```java
8 | PCMEncoder pcmEncoder = new PCMEncoder(outputFileBitrate, outputFileSampleRate, outputFileNumberOfChannels);
9 | pcmEncoder.setOutputPath(outputPath);
10 | pcmEncoder.prepare();
11 | pcmEncoder.encode(inputStream, inputStreamSampleRate);
12 | pcmEncoder.stop();
13 | ```
14 |
15 | The encode method can be called multiple times (see MainActivity for more details).
16 |
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/app/build.gradle:
--------------------------------------------------------------------------------
1 | apply plugin: 'com.android.application'
2 |
3 | android {
4 | compileSdkVersion 22
5 | buildToolsVersion "21.1.2"
6 |
7 | defaultConfig {
8 | applicationId "com.semantive.pcm_encoder"
9 | minSdkVersion 18
10 | targetSdkVersion 22
11 | versionCode 1
12 | versionName "1.0"
13 | }
14 | buildTypes {
15 | release {
16 | minifyEnabled false
17 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
18 | }
19 | }
20 | }
21 |
22 | dependencies {
23 | compile fileTree(dir: 'libs', include: ['*.jar'])
24 | compile 'com.android.support:appcompat-v7:22.0.0'
25 | }
26 |
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/app/proguard-rules.pro:
--------------------------------------------------------------------------------
1 | # Add project specific ProGuard rules here.
2 | # By default, the flags in this file are appended to flags specified
3 | # in /home/ania/bin/Android/Sdk/tools/proguard/proguard-android.txt
4 | # You can edit the include path and order by changing the proguardFiles
5 | # directive in build.gradle.
6 | #
7 | # For more details, see
8 | # http://developer.android.com/guide/developing/tools/proguard.html
9 |
10 | # Add any project specific keep options here:
11 |
12 | # If your project uses WebView with JS, uncomment the following
13 | # and specify the fully qualified class name to the JavaScript interface
14 | # class:
15 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
16 | # public *;
17 | #}
18 |
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/app/src/main/AndroidManifest.xml:
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1 |
2 |
4 |
5 |
10 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
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/gradle.properties:
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1 | # Project-wide Gradle settings.
2 |
3 | # IDE (e.g. Android Studio) users:
4 | # Gradle settings configured through the IDE *will override*
5 | # any settings specified in this file.
6 |
7 | # For more details on how to configure your build environment visit
8 | # http://www.gradle.org/docs/current/userguide/build_environment.html
9 |
10 | # Specifies the JVM arguments used for the daemon process.
11 | # The setting is particularly useful for tweaking memory settings.
12 | # Default value: -Xmx10248m -XX:MaxPermSize=256m
13 | # org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
14 |
15 | # When configured, Gradle will run in incubating parallel mode.
16 | # This option should only be used with decoupled projects. More details, visit
17 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
18 | # org.gradle.parallel=true
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/pcm-encoder.iml:
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
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/app/src/main/res/layout/activity_main.xml:
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1 |
10 |
18 |
26 |
27 |
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/gradlew.bat:
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1 | @if "%DEBUG%" == "" @echo off
2 | @rem ##########################################################################
3 | @rem
4 | @rem Gradle startup script for Windows
5 | @rem
6 | @rem ##########################################################################
7 |
8 | @rem Set local scope for the variables with windows NT shell
9 | if "%OS%"=="Windows_NT" setlocal
10 |
11 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
12 | set DEFAULT_JVM_OPTS=
13 |
14 | set DIRNAME=%~dp0
15 | if "%DIRNAME%" == "" set DIRNAME=.
16 | set APP_BASE_NAME=%~n0
17 | set APP_HOME=%DIRNAME%
18 |
19 | @rem Find java.exe
20 | if defined JAVA_HOME goto findJavaFromJavaHome
21 |
22 | set JAVA_EXE=java.exe
23 | %JAVA_EXE% -version >NUL 2>&1
24 | if "%ERRORLEVEL%" == "0" goto init
25 |
26 | echo.
27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
28 | echo.
29 | echo Please set the JAVA_HOME variable in your environment to match the
30 | echo location of your Java installation.
31 |
32 | goto fail
33 |
34 | :findJavaFromJavaHome
35 | set JAVA_HOME=%JAVA_HOME:"=%
36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe
37 |
38 | if exist "%JAVA_EXE%" goto init
39 |
40 | echo.
41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
42 | echo.
43 | echo Please set the JAVA_HOME variable in your environment to match the
44 | echo location of your Java installation.
45 |
46 | goto fail
47 |
48 | :init
49 | @rem Get command-line arguments, handling Windowz variants
50 |
51 | if not "%OS%" == "Windows_NT" goto win9xME_args
52 | if "%@eval[2+2]" == "4" goto 4NT_args
53 |
54 | :win9xME_args
55 | @rem Slurp the command line arguments.
56 | set CMD_LINE_ARGS=
57 | set _SKIP=2
58 |
59 | :win9xME_args_slurp
60 | if "x%~1" == "x" goto execute
61 |
62 | set CMD_LINE_ARGS=%*
63 | goto execute
64 |
65 | :4NT_args
66 | @rem Get arguments from the 4NT Shell from JP Software
67 | set CMD_LINE_ARGS=%$
68 |
69 | :execute
70 | @rem Setup the command line
71 |
72 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
73 |
74 | @rem Execute Gradle
75 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
76 |
77 | :end
78 | @rem End local scope for the variables with windows NT shell
79 | if "%ERRORLEVEL%"=="0" goto mainEnd
80 |
81 | :fail
82 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
83 | rem the _cmd.exe /c_ return code!
84 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
85 | exit /b 1
86 |
87 | :mainEnd
88 | if "%OS%"=="Windows_NT" endlocal
89 |
90 | :omega
91 |
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/app/src/main/java/com/semantive/pcm_encoder/MainActivity.java:
--------------------------------------------------------------------------------
1 | package com.semantive.pcm_encoder;
2 |
3 | import android.os.Bundle;
4 | import android.os.Handler;
5 | import android.support.v7.app.ActionBarActivity;
6 | import android.util.Log;
7 | import android.view.Menu;
8 | import android.view.MenuItem;
9 | import android.view.View;
10 | import android.widget.Button;
11 | import android.widget.Toast;
12 |
13 | import java.io.File;
14 | import java.io.IOException;
15 | import java.io.InputStream;
16 | import java.util.concurrent.ExecutorService;
17 | import java.util.concurrent.Executors;
18 |
19 |
20 | public class MainActivity extends ActionBarActivity {
21 |
22 | private static final String TAG = "MainActivity";
23 | private Handler handler;
24 |
25 | @Override
26 | protected void onCreate(Bundle savedInstanceState) {
27 | super.onCreate(savedInstanceState);
28 | setContentView(R.layout.activity_main);
29 |
30 | handler = new Handler();
31 |
32 | Button single = (Button) findViewById(R.id.single);
33 | single.setOnClickListener(new View.OnClickListener() {
34 | @Override
35 | public void onClick(View v) {
36 | try {
37 | File tmpFile = File.createTempFile("single_" + System.currentTimeMillis(), ".m4a", getExternalCacheDir());
38 | encodeSingleFile(tmpFile.getAbsolutePath());
39 | } catch (IOException e) {
40 | Log.e(TAG, "Exception while creating tmp file", e);
41 | }
42 | }
43 | });
44 |
45 | Button multiple = (Button) findViewById(R.id.multiple);
46 | multiple.setOnClickListener(new View.OnClickListener() {
47 | @Override
48 | public void onClick(View v) {
49 | try {
50 | File tmpFile = File.createTempFile("multiple_" + System.currentTimeMillis(), ".m4a", getExternalCacheDir());
51 | encodeMultipleFiles(tmpFile.getAbsolutePath());
52 | } catch (IOException e) {
53 | Log.e(TAG, "Exception while creating tmp file", e);
54 | }
55 | }
56 | });
57 | }
58 |
59 | private void encodeSingleFile(final String outputPath) {
60 | ExecutorService executorService = Executors.newSingleThreadExecutor();
61 | executorService.submit(encodeTask(1, outputPath));
62 | }
63 |
64 | private void encodeMultipleFiles(final String outputPath) {
65 | ExecutorService executorService = Executors.newSingleThreadExecutor();
66 | executorService.submit(encodeTask(10, outputPath));
67 | }
68 |
69 | private Runnable encodeTask(final int numFiles, final String outputPath) {
70 | return new Runnable() {
71 | @Override
72 | public void run() {
73 | try {
74 | final PCMEncoder pcmEncoder = new PCMEncoder(16000, 11025, 1);
75 | pcmEncoder.setOutputPath(outputPath);
76 | pcmEncoder.prepare();
77 | for (int i = 0; i < numFiles; i++) {
78 | Log.d(TAG, "Encoding: " + i);
79 | InputStream inputStream = getAssets().open("test.wav");
80 | inputStream.skip(44);
81 | pcmEncoder.encode(inputStream, 11025);
82 | }
83 | pcmEncoder.stop();
84 | handler.post(new Runnable() {
85 | @Override
86 | public void run() {
87 | Toast.makeText(getApplicationContext(), "Encoded file to: " + outputPath, Toast.LENGTH_LONG).show();
88 | }
89 | });
90 | } catch (IOException e) {
91 | Log.e(TAG, "Cannot create FileInputStream", e);
92 | }
93 | }
94 | };
95 | }
96 |
97 | @Override
98 | public boolean onCreateOptionsMenu(Menu menu) {
99 | // Inflate the menu; this adds items to the action bar if it is present.
100 | getMenuInflater().inflate(R.menu.menu_main, menu);
101 | return true;
102 | }
103 |
104 | @Override
105 | public boolean onOptionsItemSelected(MenuItem item) {
106 | // Handle action bar item clicks here. The action bar will
107 | // automatically handle clicks on the Home/Up button, so long
108 | // as you specify a parent activity in AndroidManifest.xml.
109 | int id = item.getItemId();
110 |
111 | //noinspection SimplifiableIfStatement
112 | if (id == R.id.action_settings) {
113 | return true;
114 | }
115 |
116 | return super.onOptionsItemSelected(item);
117 | }
118 | }
119 |
--------------------------------------------------------------------------------
/gradlew:
--------------------------------------------------------------------------------
1 | #!/usr/bin/env bash
2 |
3 | ##############################################################################
4 | ##
5 | ## Gradle start up script for UN*X
6 | ##
7 | ##############################################################################
8 |
9 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
10 | DEFAULT_JVM_OPTS=""
11 |
12 | APP_NAME="Gradle"
13 | APP_BASE_NAME=`basename "$0"`
14 |
15 | # Use the maximum available, or set MAX_FD != -1 to use that value.
16 | MAX_FD="maximum"
17 |
18 | warn ( ) {
19 | echo "$*"
20 | }
21 |
22 | die ( ) {
23 | echo
24 | echo "$*"
25 | echo
26 | exit 1
27 | }
28 |
29 | # OS specific support (must be 'true' or 'false').
30 | cygwin=false
31 | msys=false
32 | darwin=false
33 | case "`uname`" in
34 | CYGWIN* )
35 | cygwin=true
36 | ;;
37 | Darwin* )
38 | darwin=true
39 | ;;
40 | MINGW* )
41 | msys=true
42 | ;;
43 | esac
44 |
45 | # For Cygwin, ensure paths are in UNIX format before anything is touched.
46 | if $cygwin ; then
47 | [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
48 | fi
49 |
50 | # Attempt to set APP_HOME
51 | # Resolve links: $0 may be a link
52 | PRG="$0"
53 | # Need this for relative symlinks.
54 | while [ -h "$PRG" ] ; do
55 | ls=`ls -ld "$PRG"`
56 | link=`expr "$ls" : '.*-> \(.*\)$'`
57 | if expr "$link" : '/.*' > /dev/null; then
58 | PRG="$link"
59 | else
60 | PRG=`dirname "$PRG"`"/$link"
61 | fi
62 | done
63 | SAVED="`pwd`"
64 | cd "`dirname \"$PRG\"`/" >&-
65 | APP_HOME="`pwd -P`"
66 | cd "$SAVED" >&-
67 |
68 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
69 |
70 | # Determine the Java command to use to start the JVM.
71 | if [ -n "$JAVA_HOME" ] ; then
72 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
73 | # IBM's JDK on AIX uses strange locations for the executables
74 | JAVACMD="$JAVA_HOME/jre/sh/java"
75 | else
76 | JAVACMD="$JAVA_HOME/bin/java"
77 | fi
78 | if [ ! -x "$JAVACMD" ] ; then
79 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
80 |
81 | Please set the JAVA_HOME variable in your environment to match the
82 | location of your Java installation."
83 | fi
84 | else
85 | JAVACMD="java"
86 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
87 |
88 | Please set the JAVA_HOME variable in your environment to match the
89 | location of your Java installation."
90 | fi
91 |
92 | # Increase the maximum file descriptors if we can.
93 | if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
94 | MAX_FD_LIMIT=`ulimit -H -n`
95 | if [ $? -eq 0 ] ; then
96 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
97 | MAX_FD="$MAX_FD_LIMIT"
98 | fi
99 | ulimit -n $MAX_FD
100 | if [ $? -ne 0 ] ; then
101 | warn "Could not set maximum file descriptor limit: $MAX_FD"
102 | fi
103 | else
104 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
105 | fi
106 | fi
107 |
108 | # For Darwin, add options to specify how the application appears in the dock
109 | if $darwin; then
110 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
111 | fi
112 |
113 | # For Cygwin, switch paths to Windows format before running java
114 | if $cygwin ; then
115 | APP_HOME=`cygpath --path --mixed "$APP_HOME"`
116 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
117 |
118 | # We build the pattern for arguments to be converted via cygpath
119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
120 | SEP=""
121 | for dir in $ROOTDIRSRAW ; do
122 | ROOTDIRS="$ROOTDIRS$SEP$dir"
123 | SEP="|"
124 | done
125 | OURCYGPATTERN="(^($ROOTDIRS))"
126 | # Add a user-defined pattern to the cygpath arguments
127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then
128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
129 | fi
130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh
131 | i=0
132 | for arg in "$@" ; do
133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
135 |
136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
138 | else
139 | eval `echo args$i`="\"$arg\""
140 | fi
141 | i=$((i+1))
142 | done
143 | case $i in
144 | (0) set -- ;;
145 | (1) set -- "$args0" ;;
146 | (2) set -- "$args0" "$args1" ;;
147 | (3) set -- "$args0" "$args1" "$args2" ;;
148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
154 | esac
155 | fi
156 |
157 | # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
158 | function splitJvmOpts() {
159 | JVM_OPTS=("$@")
160 | }
161 | eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
162 | JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
163 |
164 | exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
165 |
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/app/src/main/java/com/semantive/pcm_encoder/PCMEncoder.java:
--------------------------------------------------------------------------------
1 | package com.semantive.pcm_encoder;
2 |
3 | import android.media.MediaCodec;
4 | import android.media.MediaCodecInfo;
5 | import android.media.MediaFormat;
6 | import android.media.MediaMuxer;
7 | import android.util.Log;
8 |
9 | import java.io.IOException;
10 | import java.io.InputStream;
11 | import java.nio.ByteBuffer;
12 |
13 | /**
14 | * @author Anna Stępień
15 | * @since 02.07.15
16 | *
17 | * PCMEncoder allows encoding multiple input streams of PCM data into one, compressed audio file.
18 | */
19 |
20 | public class PCMEncoder {
21 |
22 | private static final String TAG = "PCMEncoder";
23 |
24 | private static final String COMPRESSED_AUDIO_FILE_MIME_TYPE = "audio/mp4a-latm";
25 |
26 | private static final int CODEC_TIMEOUT = 5000;
27 |
28 | private int bitrate;
29 | private int sampleRate;
30 | private int channelCount;
31 |
32 | private MediaFormat mediaFormat;
33 | private MediaCodec mediaCodec;
34 | private MediaMuxer mediaMuxer;
35 | private ByteBuffer[] codecInputBuffers;
36 | private ByteBuffer[] codecOutputBuffers;
37 | private MediaCodec.BufferInfo bufferInfo;
38 | private String outputPath;
39 | private int audioTrackId;
40 | private int totalBytesRead;
41 | private double presentationTimeUs;
42 |
43 | /**
44 | * Creates encoder with given params for output file
45 | *
46 | * @param bitrate
47 | * @param sampleRate
48 | * @param channelCount
49 | */
50 | public PCMEncoder(final int bitrate, final int sampleRate, int channelCount) {
51 | this.bitrate = bitrate;
52 | this.sampleRate = sampleRate;
53 | this.channelCount = channelCount;
54 | }
55 |
56 | public void setOutputPath(final String outputPath) {
57 | this.outputPath = outputPath;
58 | }
59 |
60 | public void prepare() {
61 | if (outputPath == null) {
62 | throw new IllegalStateException("The output path must be set first!");
63 | }
64 | try {
65 | mediaFormat = MediaFormat.createAudioFormat(COMPRESSED_AUDIO_FILE_MIME_TYPE, sampleRate, channelCount);
66 | mediaFormat.setInteger(MediaFormat.KEY_AAC_PROFILE, MediaCodecInfo.CodecProfileLevel.AACObjectLC);
67 | mediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, bitrate);
68 |
69 | mediaCodec = MediaCodec.createEncoderByType(COMPRESSED_AUDIO_FILE_MIME_TYPE);
70 | mediaCodec.configure(mediaFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
71 | mediaCodec.start();
72 |
73 | codecInputBuffers = mediaCodec.getInputBuffers();
74 | codecOutputBuffers = mediaCodec.getOutputBuffers();
75 |
76 | bufferInfo = new MediaCodec.BufferInfo();
77 |
78 | mediaMuxer = new MediaMuxer(outputPath, MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4);
79 | totalBytesRead = 0;
80 | presentationTimeUs = 0;
81 | } catch (IOException e) {
82 | Log.e(TAG, "Exception while initializing PCMEncoder", e);
83 | }
84 | }
85 |
86 | public void stop() {
87 | Log.d(TAG, "Stopping PCMEncoder");
88 | handleEndOfStream();
89 |
90 | mediaCodec.stop();
91 | mediaCodec.release();
92 | mediaMuxer.stop();
93 | mediaMuxer.release();
94 | }
95 |
96 | private void handleEndOfStream() {
97 | int inputBufferIndex = mediaCodec.dequeueInputBuffer(CODEC_TIMEOUT);
98 | mediaCodec.queueInputBuffer(inputBufferIndex, 0, 0, (long) presentationTimeUs, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
99 | writeOutputs();
100 | }
101 |
102 | /**
103 | * Encodes input stream
104 | *
105 | * @param inputStream
106 | * @param sampleRate sample rate of input stream
107 | * @throws IOException
108 | */
109 | public void encode(InputStream inputStream, int sampleRate) throws IOException {
110 | Log.d(TAG, "Starting encoding of InputStream");
111 | byte[] tempBuffer = new byte[2 * sampleRate];
112 | boolean hasMoreData = true;
113 | boolean stop = false;
114 |
115 | while (!stop) {
116 | int inputBufferIndex = 0;
117 | int currentBatchRead = 0;
118 | while (inputBufferIndex != -1 && hasMoreData && currentBatchRead <= 50 * sampleRate) {
119 | inputBufferIndex = mediaCodec.dequeueInputBuffer(CODEC_TIMEOUT);
120 |
121 | if (inputBufferIndex >= 0) {
122 | ByteBuffer buffer = codecInputBuffers[inputBufferIndex];
123 | buffer.clear();
124 |
125 | int bytesRead = inputStream.read(tempBuffer, 0, buffer.limit());
126 | if (bytesRead == -1) {
127 | mediaCodec.queueInputBuffer(inputBufferIndex, 0, 0, (long) presentationTimeUs, 0);
128 | hasMoreData = false;
129 | stop = true;
130 | } else {
131 | totalBytesRead += bytesRead;
132 | currentBatchRead += bytesRead;
133 | buffer.put(tempBuffer, 0, bytesRead);
134 | mediaCodec.queueInputBuffer(inputBufferIndex, 0, bytesRead, (long) presentationTimeUs, 0);
135 | presentationTimeUs = 1000000L * (totalBytesRead / 2) / sampleRate;
136 | }
137 | }
138 | }
139 |
140 | writeOutputs();
141 | }
142 |
143 | inputStream.close();
144 | Log.d(TAG, "Finished encoding of InputStream");
145 | }
146 |
147 | private void writeOutputs() {
148 | int outputBufferIndex = 0;
149 | while (outputBufferIndex != MediaCodec.INFO_TRY_AGAIN_LATER) {
150 | outputBufferIndex = mediaCodec.dequeueOutputBuffer(bufferInfo, CODEC_TIMEOUT);
151 | if (outputBufferIndex >= 0) {
152 | ByteBuffer encodedData = codecOutputBuffers[outputBufferIndex];
153 | encodedData.position(bufferInfo.offset);
154 | encodedData.limit(bufferInfo.offset + bufferInfo.size);
155 |
156 | if ((bufferInfo.flags & MediaCodec.BUFFER_FLAG_CODEC_CONFIG) != 0 && bufferInfo.size != 0) {
157 | mediaCodec.releaseOutputBuffer(outputBufferIndex, false);
158 | } else {
159 | mediaMuxer.writeSampleData(audioTrackId, codecOutputBuffers[outputBufferIndex], bufferInfo);
160 | mediaCodec.releaseOutputBuffer(outputBufferIndex, false);
161 | }
162 | } else if (outputBufferIndex == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
163 | mediaFormat = mediaCodec.getOutputFormat();
164 | audioTrackId = mediaMuxer.addTrack(mediaFormat);
165 | mediaMuxer.start();
166 | }
167 | }
168 | }
169 | }
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/app/app.iml:
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