playbin2 成员

1. playbin2

struct _GstPlayBin

{

GstPipeline parent;

GMutex
*lock;

GstSourceGroup
groups[2];

GstSourceGroup
*curr_group;

GstSourceGroup
*next_group;

guint
connection_speed;

gint
current_video;

gint
current_audio;

gint
current_text;

guint64
buffer_duration;

guint
buffer_size;

GstPlaySink *playsink; //sink也可能是一个bin

GstElement *source;

GMutex *dyn_lock;

gint shutdown;

GMutex *elements_lock;

guint32 elements_cookie;

GValueArray
*elements;

gboolean
have_selector;

GstElement
*audio_sink;

GstElement
*video_sink;

GstElement
*text_sink;

struct

{

gboolean
valid;

GstFormat
format;

gint64
duration;

}
duration[5];

GstSegment
segments[3];

};

2. Playsink

在playbin2的playsink中构建了一些chain：

struct _GstPlaySink

{

GstBin
bin;

GstPlayAudioChain *audiochain;

GstPlayVideoDeinterlaceChain *videodeinterlacechain;

GstPlayVideoChain *videochain;

GstPlayVisChain *vischain;

GstPlayTextChain *textchain;

}

其中：

audiochain：

videoChain：

textChain:

videodeinterlacechain:

vischain:

chain的数据结构：

从上面的数据结构可以看到，chain就是一个bin包含了一个完整的flow。每一个bin包含property，并且需要绑定signal和callback函数：