整个程序的结构从文件：
ijkplayer_jni.c开始：
参照：
static JNINativeMethod g_methods[] = {
……
}
一、在JNI_OnLoad()/ijkplayer_jni.c调用ijkmp_global_init()/ff_ffplay.c完成ffmpeg的初始化，，调用FFmpegApi_global_init()/ffmpeg_api_jni.c中完成g_methods中函数的注册
二、IjkMediaPlayer_native_init()/ijkplayer_jni.c为空
三、IjkMediaPlayer_native_setup()/ijkplayer_jni.c
1.ijkmp_android_create()/ijkplayer_jni.c
1.1. 创建相应的结构并设置消息处理函数ijkmp_android_create()/ijkplayer_android.c—>message_loop()/ijkplayer_jni.c—>message_loop_n()/ijkplayer_jni.c
2.ijkmp_create()/ijkplayer_android.c
3.ffpipeline_create_from_android()/ffpipeline_android.c
{
……
pipeline->func_open_video_decoder= func_open_video_decoder;
……
}
4.
staticIJKFF_Pipenode *func_open_video_decoder(IJKFF_Pipeline *pipeline, FFPlayer*ffp)
{
IJKFF_Pipeline_Opaque *opaque =pipeline->opaque;
IJKFF_Pipenode *node = NULL;
if (ffp->mediacodec) //根据是否设置mediacodec参数决定是否启用硬解码
node =ffpipenode_create_video_decoder_from_android_mediacodec(ffp, pipeline,opaque->weak_vout);
if (!node) {
node =ffpipenode_create_video_decoder_from_ffplay(ffp);
}
return node;
}
四、IjkMediaPlayer_setVideoSurface()//设置surface：
1.IjkMediaPlayer_setVideoSurface()/ijkplayer_jni.c
2.ijkmp_android_set_surface()/ijkplayer_android.c
3.ijkmp_android_set_surface_l()/ijkplayer_android.c
3.1.SDL_VoutAndroid_SetAndroidSurface()/ijkplayer_android.c–>SDL_VoutAndroid_SetAndroidSurface()/ijksdl_vout_android_surface.c—>SDL_VoutAndroid_SetNativeWindow()/ijksdl_vout_android_nativewindow.c—>SDL_VoutAndroid_SetNativeWindow_l()/ijksdl_vout_android_nativewindow.c
3.2.ffpipeline_set_surface()/ffpipeline_android.c
五、IjkMediaPlayer_prepareAsync() //初始化
1. IjkMediaPlayer_prepareAsync()/ijkplayer_jni.c
2. ijkmp_prepare_async()/ijkplayer.c
3. ijkmp_prepare_async_l()/ijkplayer.c
4.mp->msg_thread = SDL_CreateThreadEx(&mp->_msg_thread,mp->msg_loop, mp, "ff_msg_loop");创建相应的消息处理线程
5.ffp_prepare_async_l()/ff_ffplay.c
6.stream_open()/ff_ffplayer.c
{
……
is->video_refresh_tid= SDL_CreateThreadEx(&is->_video_refresh_tid, video_refresh_thread, ffp,"ff_vout"); //启用相应的显示线程
……
}
6.1.video_refresh_thread()/ff_ffplay.c
6.2.ffpipenode_run_sync()/ff_ffpipenode.c
6.3.staticint func_run_sync(IJKFF_Pipenode *node)
{
IJKFF_Pipenode_Opaque *opaque =node->opaque;
returnffp_video_refresh_thread(opaque->ffp);
}//ffpipenode_ffplay_vout.c
6.4.int ffp_video_refresh_thread(FFPlayer*ffp)
{
return ffplay_video_refresh_thread(ffp);
}//ff_ffplay.c
6.5.video_refresh()/ff_ffplay.c
6.6.video_display2()/ff_ffplay.c
6.7.video_image_display2()/ff_ffplay.c
{
……
SDL_VoutDisplayYUVOverlay(ffp->vout,vp->bmp); //显示相应的数据
……
}
7.stream_open()/ff_ffplayer.c
{
……
is->read_tid= SDL_CreateThreadEx(&is->_read_tid, read_thread, ffp,"ff_read"); //创建读线程
……
}
staticint read_thread(void *arg)
{
……
stream_component_open()
……
ret = av_read_frame(ic,pkt);
……
//ifaudio
packet_queue_put(&is->audioq,pkt);
……
//ifvideo
packet_queue_put(&is->videoq,pkt);
……
}
staticint stream_component_open(FFPlayer *ffp, int stream_index)
{
……
//ifaudio 创建audio解码线程
decoder_start(&is->auddec,audio_thread, ffp, "ff_audio_dec");
//ifvideo 创建video解码线程
decoder_start(&is->viddec,video_thread, ffp, "ff_video_dec");
}
8.//声音解码线程
staticint audio_thread(void *arg)
{
……
if((got_frame = decoder_decode_frame(ffp, &is->auddec, frame, NULL)) <0)
……
frame_queue_push(&is->sampq);
……
} //
9.//视频解码线程
staticint video_thread(void *arg)
{
FFPlayer *ffp = (FFPlayer *)arg;
intret = 0;
if (ffp->node_vdec) {
ret =ffpipenode_run_sync(ffp->node_vdec);
}
return ret;
} //ff_ffplay.c
intffpipenode_run_sync(IJKFF_Pipenode *node)
{
return node->func_run_sync(node); //此处区分软硬解码部分
} //ff_ffpipenode.c
//软解码部分
staticint func_run_sync(IJKFF_Pipenode *node)
{
IJKFF_Pipenode_Opaque *opaque = node->opaque;
return ffp_video_thread(opaque->ffp);
} //ffpipenode_ffplay_vdec.c
intffp_video_thread(FFPlayer *ffp)
{
return ffplay_video_thread(ffp);
} //ff_ffplay.c
staticint ffplay_video_thread(void *arg)
{
……
for (;;) {
ret = get_video_frame(ffp, frame);
……
ret =queue_picture(ffp, frame, pts, duration, av_frame_get_pkt_pos(frame),is->viddec.pkt_serial);
……
} //ff_ffplay.c
staticint get_video_frame(FFPlayer *ffp, AVFrame *frame)
{
VideoState *is = ffp->is;
int got_picture;
if ((got_picture =decoder_decode_frame(ffp, &is->viddec, frame, NULL)) < 0) //解码相应的视频数据
return -1;
……
}//ff_ffplay.c
//硬解码部分
staticint func_run_sync(IJKFF_Pipenode *node)
{
……
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