VLC 4 Android 全面阐述
简介
Vlc for android是一款开源安卓播放器，具备播放多媒体文件、光盘、设备以及网络流媒体协议等功能，支持ARMv7 CPU或一个x86 CPU的设备，所有播放控制特性都已经开发完整。
下面将介绍如何获取代码、编译、vlc原理、缩小延迟、添加截图和录制视频、多路播放等。
详解
1、获取代码
官网源码下载：http://mirror.us.leaseweb.net/videolan/
git获取：clone from git://git.videolan.org/vlc-ports/android.git
补丁：https://patches.videolan.org/
2、编译
1、搭配环境
AndroidSDK：adt-bundle-linux-x86-20130522
JDK：jdk-7u25-linux-i586
NDK：android-ndk-r8e-linux-x86
2、安装工具
apt-get install gcc
apt-get install g++
apt-get build-dep vlc
apt-get install git
apt-get install wget
apt-get install autoconf
apt-get install libtool
apt-get install subversion
apt-get install cmake
apt-get install ant
3、配置信息
export ANDROID_NDK=/home/mythou/android-dev/android-ndk-r8e
export NDKR5C=/home/mythou/ndkr5c
export NDKR6B=/home/mythou/ndkr6b
PATH=$PATH:$NDKR6B:$ANDROID_NDK
export ANDROID_ABI=armeabi-v7a
export JAVA_HOME=/home/mythou/android-dev/jdk/jdk1.7.0_25
export JRE_HOME=/home/mythou/android-dev/jdk/jdk1.7.0_25/jre
export CLASSPATH=.:$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
export ANT_HOME=/home/mythou/android-dev/apache-ant-1.8.0
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOME/bin:$ANT_HOME
export ANDROID_SDK=/home/mythou/android-dev/adt-bundle-linux-x86-20130522/sdk
PATH=$PATH:$ANDROID_SDK/tools:$ANDROID_SDK/platform-tools
4、编译
sh compile.sh or sh compile.sh release
5、辅助库
由于某些原因，有些库无法获得，请手动下载放入便可。
3、vlc播放原理
视频播放的基本步骤：
1、access 访问（获取视频数据）
2、demux 解复用（音频、视频分离）
3、decode 解码（音频和视频的解码）
4、output 输出（音频和视频的输出（aout和vout）
如图：
4、缩小延迟
修改延迟的方法有两种：1、直接用Java代码实现；2、在vlc库中修改。
涉及延迟的参数有：file-caching（文件缓存）、live-caching（直播缓存）、network-caching（网络缓存）、sout-mux-caching（输出缓存）。
Java代码实现如下：
- options.add(":file-caching=1500");//文件缓存
- options.add(":network-caching=1500");//网络缓存
- options.add(":live-caching=1500");//直播缓存
- options.add(":sout-mux-caching=1500");//输出缓存
- options.add(":codec=mediacodec,iomx,all");
vlc库实现如下：
查找目标文件vlc/src/libvlc-module.c 修改对应的参数
- add_integer( "file-caching", DEFAULT_PTS_DELAY / 3000,
- CACHING_TEXT, CACHING_LONGTEXT, true )
- add_integer( "live-caching", DEFAULT_PTS_DELAY / 3000,
- CAPTURE_CACHING_TEXT, CAPTURE_CACHING_LONGTEXT, true )
- add_integer( "network-caching", CLOCK_FREQ / 3000,
- NETWORK_CACHING_TEXT, NETWORK_CACHING_LONGTEXT, true )
- add_integer( "sout-mux-caching", 1000, SOUT_MUX_CACHING_TEXT,
- SOUT_MUX_CACHING_LONGTEXT, true )
把分母数据增大，缓存的数据就越小，延迟就减少，流畅性就减少，相反，分母数据减少，缓存的数据就越大，延迟就增加，流畅性就增加。
测试结果，延迟明显减少。
5、添加截图和录制视频
官方已给出补丁实现截图和录制视频
1、截图
修改文件： android/configure.sh 搜索内容 -disable-sout 并删除
修改文件：android/vlc/contrib/src/ffmpeg/rules.mak 增加-enable-encoder=png的编码器 实现png格式截图
- FFMPEGCONF += --disable-encoders --disable-muxers
- 改成FFMPEGCONF += --disable-encoders --enable-encoder=png --disable-muxers
源码重新编译便可
编译过程中可能会出现如下问题：
- ./vlc/android/modules/.libs/libvorbis_plugin.a(libvorbis_plugin_la-vorbis.o): in function OpenEncoder:../../modules/codec/vorbis.c:758: error: undefined reference to 'vorbis_encode_setup_vbr‘
修改文件 vlc-android/jni/Android.mk
- LOCAL_LDLIBS := -L$(VLC_CONTRIB)/lib \
- $(VLC_MODULES) \
- $(VLC_BUILD_DIR)/lib/.libs/libvlc.a \
- $(VLC_BUILD_DIR)/src/.libs/libvlccore.a \
- $(VLC_BUILD_DIR)/compat/.libs/libcompat.a \
- -ldl -lz -lm -llog \
- -ldvbpsi -lebml -lmatroska -ltag \
- -logg -lFLAC -ltheora -lvorbis -lvorbisfile -lvorbisenc \
- -lmpeg2 -la52 \
- -lavformat -lavcodec -lswscale -lavutil -lpostproc -lgsm -lopenjpeg \
- -lliveMedia -lUsageEnvironment -lBasicUsageEnvironment -lgroupsock \
- -lspeex -lspeexdsp \
- -lxml2 -lpng -lgnutls -lgcrypt -lgpg-error \
- -lnettle -lhogweed -lgmp \
- -lfreetype -liconv -lass -lfribidi -lopus \
- -lEGL -lGLESv2 -ljpeg \
- $(CPP_STATIC)
- 在
- -logg -lFLAC -ltheora -lvorbis
- 后添加
- -lvorbisfile -lvorbisenc
- error: undefined reference to 'vlc_entry__access_output_udp'
修改文件： /vlc/modules/access_output/ Modules.am
- SOURCES_access_output_dummy = dummy.c
- SOURCES_access_output_file = file.c
- SOURCES_access_output_udp = udp.c
- SOURCES_access_output_http = http.c bonjour.c bonjour.h
- SOURCES_access_output_shout = shout.c
- access_output_LTLIBRARIES += \
- libaccess_output_dummy_plugin.la \
- libaccess_output_file_plugin.la \
- libaccess_output_udp_plugin.la \
- libaccess_output_http_plugin.la
- #libaccess_output_udp_plugin_la_SOURCES = udp.c
- #libaccess_output_udp_plugin_la_LIBADD = $(SOCKET_LIBS) $(LIBPTHREAD)
- #access_output_LTLIBRARIES += libaccess_output_udp_plugin.la
- libaccess_output_livehttp_plugin_la_SOURCES = livehttp.c
- libaccess_output_livehttp_plugin_la_CFLAGS = $(AM_CFLAGS) $(GCRYPT_CFLAGS)
- libaccess_output_livehttp_plugin_la_LIBADD = $(GCRYPT_LIBS) -lgpg-error
- if HAVE_GCRYPT
- access_output_LTLIBRARIES += libaccess_output_livehttp_plugin.la
- endif
- 内容覆盖便可
相关源码添加：
在libvlcjni.c中增加函数：
- boolean Java_org_videolan_libvlc_LibVLC_takeSnapShot(JNIEnv *env, jobject thiz,jint number, jstring path, jint width,jint height)
- {
- jboolean isCopy;
- libvlc_media_player_t *mp = getMediaPlayer(env, thiz);
- /* Get C string */
- const char* psz_path = (*env)->GetStringUTFChars(env, path, &isCopy);
- if (mp)
- if(libvlc_video_take_snapshot(mp, (int)number,psz_path , (int)width,(int)height)==0)
- return JNI_TRUE;
- return JNI_FALSE;
- }
LibVlc.java中增加native函数的接口和调用方法：
- private native boolean takeSnapShot( int num, String file, int width, int height);
- public boolean takeSnapShot(String file, int width, int height) {
- return takeSnapShot(0, file, width, height);
- }
2、录制视频
录制补丁 https://patches.videolan.org/patch/606/
补丁内容如下：
- diff --git a/include/vlc/libvlc_events.h b/include/vlc/libvlc_events.h
- index 2cfedbf..25a16ea 100644
- --- a/include/vlc/libvlc_events.h
- +++ b/include/vlc/libvlc_events.h
- @@ -72,6 +72,8 @@ enum libvlc_event_e {
- libvlc_MediaPlayerSnapshotTaken,
- libvlc_MediaPlayerLengthChanged,
- libvlc_MediaPlayerVout,
- + libvlc_MediaPlayerRecordableChanged,
- + libvlc_MediaPlayerRecordingFinished,
- libvlc_MediaListItemAdded=0x200,
- libvlc_MediaListWillAddItem,
- @@ -165,6 +167,14 @@ typedef struct libvlc_event_t
- } media_player_pausable_changed;
- struct
- {
- + int new_recordable;
- + } media_player_recordable_changed;
- + struct
- + {
- + char *psz_filename;
- + } media_player_recording_finished;
- + struct
- + {
- int new_count;
- } media_player_vout;
- diff --git a/include/vlc/libvlc_media_player.h b/include/vlc/libvlc_media_player.h
- index aefef02..8ddef37 100644
- --- a/include/vlc/libvlc_media_player.h
- +++ b/include/vlc/libvlc_media_player.h
- @@ -1628,6 +1628,121 @@ LIBVLC_API int libvlc_audio_set_delay( libvlc_media_player_t *p_mi, int64_t i_de
- /** @} audio */
- +/**
- + * Can the media player record the current media?
- + *
- + * Media must be buffering or playing before it can be recorded.
- + *
- + * The media player event manager will emit a libvlc_MediaPlayerRecordableChanged event
- + * when the recordable state changes after starting media playback. The event data will
- + * describe the new recordable state, so invocation of this API method is not strictly
- + * necessary to determine when recording can be started.
- + *
- + * A libvlc_MediaPlayerRecordableChanged event will not be emitted if the media is
- + * stopped (notified by a libvlc_MediaPlayerStoppedEvent) or finishes normally (notified
- + * by a libvlc_MediaPlayerFinished event).
- + *
- + * A calling application should therefore register an event callback for those events
- + * so that it may query the new recordable state and manage recording at the appropriate
- + * time.
- + *
- + * \param p_mi media player
- + * \return true if the media player can record, false if it can not
- + * \version LibVLC 2.1.0 or later
- + */
- +LIBVLC_API bool libvlc_media_player_is_recordable( libvlc_media_player_t *p_mi );
- +
- +/**
- + * Is the current media being recorded?
- + *
- + * \param p_mi media player
- + * \return true if recording, false if not
- + * \version LibVLC 2.1.0 or later
- + */
- +LIBVLC_API bool libvlc_media_player_is_recording( libvlc_media_player_t *p_mi );
- +
- +/**
- + * Start recording the current media.
- + *
- + * Media must be buffering or playing before it can be recorded. A calling application
- + * can begin recording immediately on receipt of a libvlc_MediaPlayerRecordableChanged
- + * event sent via the media player event manager (if recording is possible for the
- + * currently playing media), and any time thereafter until the media stops.
- + *
- + * Media will be saved to the file path denoted by the psz_filename parameter if it is
- + * supplied. Any such supplied filename should not include a file extension as the
- + * correct file extension will automatically be appended when the file is created. This
- + * filename may denote a full path name, but each directory in the path must already
- + * exist or recording will silently fail. If the calling application chooses to specify
- + * the filename then it is the responsibility of that application to take account of
- + * this and itself make sure any needed directories are created.
- + *
- + * Alternatively, a calling application need not supply a filename and so instead let
- + * vlc automatically generate a unique filename. This will cause vlc to create a new
- + * file in the appropriate media directory for the user - for example "~/Videos". The
- + * actual filename used will be sent in an event when the recording is complete.
- + *
- + * When recording has finished and the new file has been completely saved, a
- + * libvlc_MediaPlayerRecordingFinished event will be sent via the media player event
- + * manager. The event data will contain the filename of the newly recorded file - this
- + * will either be the filename as specified by the calling application or a filename
- + * generated by vlc if the application did not supply a filename. In either case, this
- + * filename will include the automatically appended file extension.
- + *
- + * The saved media file will not be immediately available or visible until recording
- + * has completely finished and the libvlc_MediaPlayerRecordingFinished event has been
- + * received, or the media has stopped or finished normally.
- + *
- + * Recording can be stopped and started on-the-fly once the recordable state is set;
- + * each time recording is stopped and restarted a new file will be created so a calling
- + * application should take care to provide unique filenames, or defer to vlc to create
- + * unique filenames.
- + *
- + * Recording will be stopped when the media stops playing, and must be explicitly
- + * started again to restart recording, i.e. the recording state is not automatically
- + * preserved when playing media subsequently.
- + *
- + * Media player functionailty such as next/previous chapter, set time or position and
- + * so on are ineffective when recording is enabled. However, pausing the media is
- + * possible and will pause the recording; unpausing the media will resume playback and
- + * recording.
- + *
- + * Recording of the primary media or sub-items is possible.
- + *
- + * \param p_mi media player
- + * \param psz_filename name of the file to save the media to, not including any file extension,
- + * or NULL if vlc should generate the filename automatically
- + * \return 0 if recording was started, -1 on error
- + * \version LibVLC 2.1.0 or later
- + */
- +LIBVLC_API int libvlc_media_player_record_start( libvlc_media_player_t *p_mi, const char *psz_filename );
- +
- +/**
- + * Stop recording the current media.
- + *
- + * This method requests that the recording stop, and will return immediately. Recording
- + * will not stop immediately.
- + *
- + * When the recording actually stops some short time later and the new file has
- + * finished being written, a libvlc_MediaPlayerRecordingFinished event will be sent via
- + * the media player event manager. The newly recorded file will not be visible or
- + * available until after this event has been sent.
- + *
- + * The event data will contain the full name of the file that was created. The filename
- + * will either be that as was specified by the calling application on invoking
- + * libvlc_media_player_record_start(), or the filename that vlc automatically generated
- + * if the calling application did not supply its own filename. In either case the
- + * filename will contain the automatically appended file extension.
- + *
- + * There is no need to invoke this method to stop the recording if the media is stopped
- + * or finishes playing normally.
- + *
- + * \param p_mi media player
- + * \return 0 if recording was stopped, -1 on error
- + * \version LibVLC 2.1.0 or later
- + */
- +LIBVLC_API int libvlc_media_player_record_stop( libvlc_media_player_t *p_mi );
- +
- /** @} media_player */
- # ifdef __cplusplus
- diff --git a/lib/event.c b/lib/event.c
- index c71a48a..7ef4abd 100644
- --- a/lib/event.c
- +++ b/lib/event.c
- @@ -279,6 +279,8 @@ static const event_name_t event_list[] = {
- DEF(MediaPlayerSnapshotTaken)
- DEF(MediaPlayerLengthChanged)
- DEF(MediaPlayerVout)
- + DEF(MediaPlayerRecordableChanged)
- + DEF(MediaPlayerRecordingFinished)
- DEF(MediaListItemAdded)
- DEF(MediaListWillAddItem)
- diff --git a/lib/libvlc.sym b/lib/libvlc.sym
- index 42dad5c..3ff67ef 100644
- --- a/lib/libvlc.sym
- +++ b/lib/libvlc.sym
- @@ -137,6 +137,8 @@ libvlc_media_player_get_title
- libvlc_media_player_get_title_count
- libvlc_media_player_get_xwindow
- libvlc_media_player_has_vout
- +libvlc_media_player_is_recordable
- +libvlc_media_player_is_recording
- libvlc_media_player_is_seekable
- libvlc_media_player_is_playing
- libvlc_media_player_new
- @@ -146,6 +148,8 @@ libvlc_media_player_set_pause
- libvlc_media_player_pause
- libvlc_media_player_play
- libvlc_media_player_previous_chapter
- +libvlc_media_player_record_start
- +libvlc_media_player_record_stop
- libvlc_media_player_release
- libvlc_media_player_retain
- libvlc_media_player_set_agl
- diff --git a/lib/media_player.c b/lib/media_player.c
- index a41b8c7..6573197 100644
- --- a/lib/media_player.c
- +++ b/lib/media_player.c
- @@ -64,6 +64,10 @@ input_pausable_changed( vlc_object_t * p_this, char const * psz_cmd,
- vlc_value_t oldval, vlc_value_t newval,
- void * p_userdata );
- static int
- +input_recordable_changed( vlc_object_t *p_this, char const *psz_cmd,
- + vlc_value_t oldval, vlc_value_t newval,
- + void *p_userdata );
- +static int
- input_event_changed( vlc_object_t * p_this, char const * psz_cmd,
- vlc_value_t oldval, vlc_value_t newval,
- void * p_userdata );
- @@ -72,6 +76,10 @@ static int
- snapshot_was_taken( vlc_object_t *p_this, char const *psz_cmd,
- vlc_value_t oldval, vlc_value_t newval, void *p_data );
- +static int
- +file_recording_finished( vlc_object_t *p_this, char const *psz_cmd,
- + vlc_value_t oldval, vlc_value_t newval, void *p_data );
- +
- static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi );
- /*
- @@ -132,6 +140,8 @@ static void release_input_thread( libvlc_media_player_t *p_mi, bool b_input_abor
- input_seekable_changed, p_mi );
- var_DelCallback( p_input_thread, "can-pause",
- input_pausable_changed, p_mi );
- + var_DelCallback( p_input_thread, "can-record",
- + input_recordable_changed, p_mi );
- var_DelCallback( p_input_thread, "intf-event",
- input_event_changed, p_mi );
- @@ -227,6 +237,25 @@ input_pausable_changed( vlc_object_t * p_this, char const * psz_cmd,
- }
- static int
- +input_recordable_changed( vlc_object_t *p_this, char const *psz_cmd,
- + vlc_value_t oldval, vlc_value_t newval,
- + void *p_userdata )
- +{
- + VLC_UNUSED(p_this);
- + VLC_UNUSED(psz_cmd);
- + VLC_UNUSED(oldval);
- +
- + libvlc_media_player_t *p_mi = p_userdata;
- + libvlc_event_t event;
- +
- + event.type = libvlc_MediaPlayerRecordableChanged;
- + event.u.media_player_recordable_changed.new_recordable = newval.b_bool;
- +
- + libvlc_event_send( p_mi->p_event_manager, &event );
- + return VLC_SUCCESS;
- +}
- +
- +static int
- input_event_changed( vlc_object_t * p_this, char const * psz_cmd,
- vlc_value_t oldval, vlc_value_t newval,
- void * p_userdata )
- @@ -357,6 +386,23 @@ static int snapshot_was_taken(vlc_object_t *p_this, char const *psz_cmd,
- return VLC_SUCCESS;
- }
- +static int file_recording_finished(vlc_object_t *p_this, char const *psz_cmd,
- + vlc_value_t oldval, vlc_value_t newval, void *p_data )
- +{
- + VLC_UNUSED(p_this);
- + VLC_UNUSED(psz_cmd);
- + VLC_UNUSED(oldval);
- +
- + libvlc_media_player_t *p_mi = p_data;
- + libvlc_event_t event;
- +
- + event.type = libvlc_MediaPlayerRecordingFinished;
- + event.u.media_player_recording_finished.psz_filename = newval.psz_string;
- +
- + libvlc_event_send(p_mi->p_event_manager, &event);
- + return VLC_SUCCESS;
- +}
- +
- static input_thread_t *find_input (vlc_object_t *obj)
- {
- libvlc_media_player_t *mp = (libvlc_media_player_t *)obj;
- @@ -480,6 +526,10 @@ libvlc_media_player_new( libvlc_instance_t *instance )
- var_Create (mp, "amem-set-volume", VLC_VAR_ADDRESS);
- var_Create (mp, "amem-format", VLC_VAR_STRING | VLC_VAR_DOINHERIT);
- var_Create (mp, "amem-rate", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
- +
- + var_Create (mp, "recording-finished", VLC_VAR_STRING);
- + var_AddCallback (mp, "recording-finished", file_recording_finished, mp);
- +
- var_Create (mp, "amem-channels", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
- mp->p_md = NULL;
- @@ -515,6 +565,9 @@ libvlc_media_player_new( libvlc_instance_t *instance )
- register_event(mp, TitleChanged);
- register_event(mp, PausableChanged);
- + register_event(mp, RecordableChanged);
- + register_event(mp, RecordingFinished);
- +
- register_event(mp, Vout);
- /* Snapshot initialization */
- @@ -566,6 +619,8 @@ static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi )
- var_DelCallback( p_mi->p_libvlc,
- "snapshot-file", snapshot_was_taken, p_mi );
- + var_DelCallback( p_mi, "recording-finished", file_recording_finished, p_mi );
- +
- /* No need for lock_input() because no other threads knows us anymore */
- if( p_mi->input.p_thread )
- release_input_thread(p_mi, true);
- @@ -732,12 +787,14 @@ int libvlc_media_player_play( libvlc_media_player_t *p_mi )
- var_AddCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
- var_AddCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
- + var_AddCallback( p_input_thread, "can-record", input_recordable_changed, p_mi );
- var_AddCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
- if( input_Start( p_input_thread ) )
- {
- unlock_input(p_mi);
- var_DelCallback( p_input_thread, "intf-event", input_event_changed, p_mi );
- + var_DelCallback( p_input_thread, "can-record", input_recordable_changed, p_mi );
- var_DelCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi );
- var_DelCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi );
- vlc_object_release( p_input_thread );
- @@ -1409,3 +1466,62 @@ void libvlc_media_player_next_frame( libvlc_media_player_t *p_mi )
- vlc_object_release( p_input_thread );
- }
- }
- +
- +bool libvlc_media_player_is_recordable( libvlc_media_player_t *p_mi )
- +{
- + input_thread_t *p_input_thread;
- + bool b_can_record;
- +
- + p_input_thread = libvlc_get_input_thread( p_mi );
- + if( !p_input_thread )
- + return false;
- +
- + b_can_record = var_GetBool( p_input_thread, "can-record" );
- +
- + vlc_object_release( p_input_thread );
- + return b_can_record;
- +}
- +
- +bool libvlc_media_player_is_recording( libvlc_media_player_t *p_mi )
- +{
- + input_thread_t *p_input_thread;
- + bool b_record;
- +
- + p_input_thread = libvlc_get_input_thread( p_mi );
- + if( !p_input_thread )
- + return false;
- +
- + b_record = var_GetBool( p_input_thread, "record" );
- +
- + vlc_object_release( p_input_thread );
- + return b_record;
- +}
- +
- +int libvlc_media_player_record_start( libvlc_media_player_t *p_mi, const char* psz_filename )
- +{
- + input_thread_t *p_input_thread;
- +
- + p_input_thread = libvlc_get_input_thread( p_mi );
- + if( !p_input_thread )
- + return -1;
- +
- + var_SetString( p_input_thread, "input-record-path", psz_filename );
- + var_SetBool( p_input_thread, "record", true );
- +
- + vlc_object_release( p_input_thread );
- + return 0;
- +}
- +
- +int libvlc_media_player_record_stop( libvlc_media_player_t *p_mi )
- +{
- + input_thread_t *p_input_thread;
- +
- + p_input_thread = libvlc_get_input_thread( p_mi );
- + if( !p_input_thread )
- + return -1;
- +
- + var_SetBool( p_input_thread, "record", false );
- +
- + vlc_object_release( p_input_thread );
- + return 0;
- +}
- diff --git a/modules/stream_out/record.c b/modules/stream_out/record.c
- index de6d32e..40ddfea 100644
- --- a/modules/stream_out/record.c
- +++ b/modules/stream_out/record.c
- @@ -110,6 +110,8 @@ struct sout_stream_sys_t
- int i_id;
- sout_stream_id_t **id;
- mtime_t i_dts_start;
- +
- + char *psz_record_file;
- };
- static void OutputStart( sout_stream_t *p_stream );
- @@ -158,6 +160,8 @@ static int Open( vlc_object_t *p_this )
- p_sys->i_dts_start = 0;
- TAB_INIT( p_sys->i_id, p_sys->id );
- + p_sys->psz_record_file = NULL;
- +
- return VLC_SUCCESS;
- }
- @@ -172,6 +176,19 @@ static void Close( vlc_object_t * p_this )
- if( p_sys->p_out )
- sout_StreamChainDelete( p_sys->p_out, p_sys->p_out );
- + if( p_sys->psz_record_file ) {
- + for( vlc_object_t *p_mp = p_stream->p_parent; p_mp; p_mp = p_mp->p_parent )
- + {
- + if( var_Type( p_mp, "recording-finished" ) )
- + {
- + var_SetString( p_mp, "recording-finished", p_sys->psz_record_file );
- + break;
- + }
- + }
- +
- + free( p_sys->psz_record_file );
- + }
- +
- TAB_CLEAN( p_sys->i_id, p_sys->id );
- free( p_sys->psz_prefix );
- free( p_sys );
- @@ -352,7 +369,10 @@ static int OutputNew( sout_stream_t *p_stream,
- }
- if( psz_file && psz_extension )
- + {
- + p_sys->psz_record_file = strdup( psz_file );
- var_SetString( p_stream->p_libvlc, "record-file", psz_file );
- + }
- free( psz_file );
- free( psz_output );
- diff --git a/src/input/var.c b/src/input/var.c
- index 9613fe2..04f33b9 100644
- --- a/src/input/var.c
- +++ b/src/input/var.c
- @@ -210,6 +210,9 @@ void input_ControlVarInit ( input_thread_t *p_input )
- text.psz_string = _("Subtitles Track");
- var_Change( p_input, "spu-es", VLC_VAR_SETTEXT, &text, NULL );
- + /* ES Out */
- + var_Create( p_input, "input-record-path", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
- +
- /* Special read only objects variables for intf */
- var_Create( p_input, "bookmarks", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
下载补丁，并把文件放到vlc目录中，执行命令patch -p1 < xxxx.patch，由于版本不一样有些地方会失败，请打开补丁自己检查手动修改。
补丁中主要相关函数：
- +bool libvlc_media_player_is_recordable( libvlc_media_player_t *p_mi )
- +{
- + input_thread_t *p_input_thread;
- + bool b_can_record;
- +
- + p_input_thread = libvlc_get_input_thread( p_mi );
- + if( !p_input_thread )
- + return false;
- +
- + b_can_record = var_GetBool( p_input_thread, "can-record" );
- +
- + vlc_object_release( p_input_thread );
- + return b_can_record;
- +}
- +
- +bool libvlc_media_player_is_recording( libvlc_media_player_t *p_mi )
- +{
- + input_thread_t *p_input_thread;
- + bool b_record;
- +
- + p_input_thread = libvlc_get_input_thread( p_mi );
- + if( !p_input_thread )
- + return false;
- +
- + b_record = var_GetBool( p_input_thread, "record" );
- +
- + vlc_object_release( p_input_thread );
- + return b_record;
- +}
- +
- +int libvlc_media_player_record_start( libvlc_media_player_t *p_mi, const char* psz_filename )
- +{
- + input_thread_t *p_input_thread;
- +
- + p_input_thread = libvlc_get_input_thread( p_mi );
- + if( !p_input_thread )
- + return -1;
- +
- + var_SetString( p_input_thread, "input-record-path", psz_filename );
- + var_SetBool( p_input_thread, "record", true );
- +
- + vlc_object_release( p_input_thread );
- + return 0;
- +}
- +
- +int libvlc_media_player_record_stop( libvlc_media_player_t *p_mi )
- +{
- + input_thread_t *p_input_thread;
- +
- + p_input_thread = libvlc_get_input_thread( p_mi );
- + if( !p_input_thread )
- + return -1;
- +
- + var_SetBool( p_input_thread, "record", false );
- +
- + vlc_object_release( p_input_thread );
- + return 0;
- +}
库调用方法函数如下：
- jboolean Java_org_videolan_libvlc_LibVLC_takeSnapShot(JNIEnv *env, jobject thiz,jint number, jstring path, jint width,jint height)
- {
- jboolean isCopy;
- libvlc_media_player_t *mp = getMediaPlayer(env, thiz);
- /* Get C string */
- const char* psz_path = (*env)->GetStringUTFChars(env, path, &isCopy);
- if (mp)
- if(libvlc_video_take_snapshot(mp, (int)number,psz_path , (int)width,(int)height)==0)
- return JNI_TRUE;
- return JNI_FALSE;
- }
- jboolean Java_org_videolan_libvlc_LibVLC_videoRecordStart(JNIEnv *env, jobject thiz,jstring path)
- {
- jboolean isCopy;
- libvlc_media_player_t *mp = getMediaPlayer(env, thiz);
- /* Get C string */
- const char* psz_path = (*env)->GetStringUTFChars(env, path, &isCopy);
- //const char* psz_filename=(*env)->GetStringUTFChars(env, filename, &isCopy);
- if (mp)
- if(libvlc_media_player_record_start(mp,psz_path)==0)
- return JNI_TRUE;
- return JNI_FALSE;
- }
- jboolean Java_org_videolan_libvlc_LibVLC_videoRecordStop(JNIEnv *env, jobject thiz)
- {
- jboolean isCopy;
- libvlc_media_player_t *mp = getMediaPlayer(env, thiz);
- /* Get C string */
- if (mp)
- if(libvlc_media_player_record_stop(mp)==0)
- return JNI_TRUE;
- return JNI_FALSE;
- }
- jboolean Java_org_videolan_libvlc_LibVLC_videoIsRecording(JNIEnv *env, jobject thiz)
- {
- jboolean isCopy;
- libvlc_media_player_t *mp = getMediaPlayer(env, thiz);
- if (mp)
- if(libvlc_media_player_is_recording(mp))
- return JNI_TRUE;
- return JNI_FALSE;
- }
- jboolean Java_org_videolan_libvlc_LibVLC_videoIsRecordable(JNIEnv *env, jobject thiz)
- {
- jboolean isCopy;
- libvlc_media_player_t *mp = getMediaPlayer(env, thiz);
- if (mp)
- if(libvlc_media_player_is_recordable(mp))
- return JNI_TRUE;
- return JNI_FALSE;
- }
- jint Java_org_videolan_libvlc_LibVLC_getState(JNIEnv *env, jobject thiz)
- {
- libvlc_media_player_t *mp = getMediaPlayer(env, thiz);
- if (mp){
- libvlc_state_t state=libvlc_media_player_get_state(mp);
- return (jint)state;
- }
- else
- return -1;
- }
6、实现多路播放
使用process属性实现
总结
接触vlc for android 是帮助朋友完成一个外单，即实现认证播放器的封装（即添加播放网络视频的认证），传地址便可播放。
经测试vlc无法播放swf文件，为了弥补这已缺陷，准备添加swfdec到android平台以支持swf文件。
推荐博客网站：http://flavienlaurent.com/