好多開發者提到，為什么大牛直播SDK的Android平臺RTMP推送接口怎么這么多？不像一些開源或者商業RTMP推送一樣，就幾個接口，簡單明了。

不解釋，以Android平臺RTMP推送模塊常用接口，看看這些接口有沒有存在的意義？本文簡單介紹，全當拋磚引玉，相關資料，可參考 Github：

1. 初始化Publisher接口，返回推送實例句柄：

/*** Open publisher(啟動推送實例)** @param ctx: get by this.getApplicationContext()* * @param audio_opt:* if 0: 不推送音頻* if 1: 推送編碼前音頻(PCM)* if 2: 推送編碼后音頻(aac/pcma/pcmu/speex).* * @param video_opt:* if 0: 不推送視頻* if 1: 推送編碼前視頻(YUV420SP/YUV420P/RGBA/ARGB)* if 2: 推送編碼后視頻(H.264)** @param width: capture width; height: capture height.** <pre>This function must be called firstly.</pre>** @return the handle of publisher instance*/public native long SmartPublisherOpen(Object ctx, int audio_opt, int video_opt, int width, int height);

2. 相關Event事件回調，如網絡狀態、實時快照、錄像狀態等回調：

/*** Set callback event(設置事件回調)* * @param callbackv2: callback function* * @return {0} if successful*/public native int SetSmartPublisherEventCallbackV2(long handle, NTSmartEventCallbackV2 callbackv2); class EventHandeV2 implements NTSmartEventCallbackV2 {@Overridepublic void onNTSmartEventCallbackV2(long handle, int id, long param1, long param2, String param3, String param4, Object param5) {Log.i(TAG, "EventHandeV2: handle=" + handle + " id:" + id);String publisher_event = "";switch (id) {case NTSmartEventID.EVENT_DANIULIVE_ERC_PUBLISHER_STARTED:publisher_event = "開始..";break;case NTSmartEventID.EVENT_DANIULIVE_ERC_PUBLISHER_CONNECTING:publisher_event = "連接中..";break;case NTSmartEventID.EVENT_DANIULIVE_ERC_PUBLISHER_CONNECTION_FAILED:publisher_event = "連接失敗..";break;case NTSmartEventID.EVENT_DANIULIVE_ERC_PUBLISHER_CONNECTED:publisher_event = "連接成功..";break;case NTSmartEventID.EVENT_DANIULIVE_ERC_PUBLISHER_DISCONNECTED:publisher_event = "連接斷開..";break;case NTSmartEventID.EVENT_DANIULIVE_ERC_PUBLISHER_STOP:publisher_event = "關閉..";break;case NTSmartEventID.EVENT_DANIULIVE_ERC_PUBLISHER_RECORDER_START_NEW_FILE:publisher_event = "開始一個新的錄像文件 : " + param3;break;case NTSmartEventID.EVENT_DANIULIVE_ERC_PUBLISHER_ONE_RECORDER_FILE_FINISHED:publisher_event = "已生成一個錄像文件 : " + param3;break;case NTSmartEventID.EVENT_DANIULIVE_ERC_PUBLISHER_SEND_DELAY:publisher_event = "發送時延: " + param1 + " 幀數:" + param2;break;case NTSmartEventID.EVENT_DANIULIVE_ERC_PUBLISHER_CAPTURE_IMAGE:publisher_event = "快照: " + param1 + " 路徑：" + param3;if (param1 == 0) {publisher_event = publisher_event + "截取快照成功..";} else {publisher_event = publisher_event + "截取快照失敗..";}break;case NTSmartEventID.EVENT_DANIULIVE_ERC_PUBLISHER_RTSP_URL:publisher_event = "RTSP服務URL: " + param3;break;case NTSmartEventID.EVENT_DANIULIVE_ERC_PUSH_RTSP_SERVER_RESPONSE_STATUS_CODE:publisher_event ="RTSP status code received, codeID: " + param1 + ", RTSP URL: " + param3;break;case NTSmartEventID.EVENT_DANIULIVE_ERC_PUSH_RTSP_SERVER_NOT_SUPPORT:publisher_event ="服務器不支持RTSP推送, 推送的RTSP URL: " + param3;break;}String str = "當前回調狀態：" + publisher_event;Log.i(TAG, str);Message message = new Message();message.what = PUBLISHER_EVENT_MSG;message.obj = publisher_event;handler.sendMessage(message);}}

3. 檢測/設置軟硬編碼：

/*** Set Video H.264 HW Encoder, if support HW encoder, it will return 0(設置H.264硬編碼)* * @param kbps: the kbps of different resolution(25 fps).* * @return {0} if successful*/public native int SetSmartPublisherVideoHWEncoder(long handle, int kbps);/*** Set Video H.265(hevc) hardware encoder, if support H.265(hevc) hardware encoder, it will return 0(設置H.265硬編碼)** @param kbps: the kbps of different resolution(25 fps).** @return {0} if successful*/public native int SetSmartPublisherVideoHevcHWEncoder(long handle, int kbps);

4. 設置文字水印、PNG圖片水印：

/*** Set Text water-mark(設置文字水印)* * @param fontSize: it should be "MEDIUM", "SMALL", "BIG"* * @param waterPostion: it should be "TOPLEFT", "TOPRIGHT", "BOTTOMLEFT", "BOTTOMRIGHT".* * @param xPading, yPading: the distance of the original picture.* * <pre> The interface is only used for setting font water-mark when publishing stream. </pre> * * @return {0} if successful*/public native int SmartPublisherSetTextWatermark(long handle, String waterText, int isAppendTime, int fontSize, int waterPostion, int xPading, int yPading);/*** Set Text water-mark font file name(設置文字水印字體路徑)** @param fontFileName: font full file name, e.g: /system/fonts/DroidSansFallback.ttf** @return {0} if successful*/public native int SmartPublisherSetTextWatermarkFontFileName(long handle, String fontFileName);/*** Set picture water-mark(設置png圖片水印)* * @param picPath: the picture working path, e.g: /sdcard/logo.png* * @param waterPostion: it should be "TOPLEFT", "TOPRIGHT", "BOTTOMLEFT", "BOTTOMRIGHT".* * @param picWidth, picHeight: picture width & height* * @param xPading, yPading: the distance of the original picture.* * <pre> The interface is only used for setting picture(logo) water-mark when publishing stream, with "*.png" format </pre> * * @return {0} if successful*/public native int SmartPublisherSetPictureWatermark(long handle, String picPath, int waterPostion, int picWidth, int picHeight, int xPading, int yPading);

5. 軟編碼可變碼率設置（如攝像頭采集編碼，在設備性能允許的情況下，可以考慮軟編碼可變碼率）：

/*** Set software encode vbr mode(軟編碼可變碼率).** <pre>please set before SmartPublisherStart while after SmartPublisherOpen.</pre>** is_enable_vbr: if 0: NOT enable vbr mode, 1: enable vbr** video_quality: vbr video quality, range with (1,50), default 23** vbr_max_kbitrate: vbr max encode bit-rate(kbps)** @return {0} if successful*/public native int SmartPublisherSetSwVBRMode(long handle, int is_enable_vbr, int video_quality, int vbr_max_kbitrate);

6. 幀率、軟編碼碼率、關鍵幀間隔，編碼速度、軟編碼profile等基礎設定：

/*** Set gop interval(設置I幀間隔)** <pre>please set before SmartPublisherStart while after SmartPublisherOpen.</pre>** gopInterval: encode I frame interval, the value always > 0** @return {0} if successful*/public native int SmartPublisherSetGopInterval(long handle, int gopInterval);/*** Set software encode video bit-rate(設置視頻軟編碼bit-rate)** <pre>please set before SmartPublisherStart while after SmartPublisherOpen.</pre>** avgBitRate: average encode bit-rate(kbps)* * maxBitRate: max encode bit-rate(kbps)** @return {0} if successful*/public native int SmartPublisherSetSWVideoBitRate(long handle, int avgBitRate, int maxBitRate);/*** Set fps(設置幀率)** <pre>please set before SmartPublisherStart while after SmartPublisherOpen.</pre>** fps: the fps of video, range with (1,25).** @return {0} if successful*/public native int SmartPublisherSetFPS(long handle, int fps);/*** Set software video encoder profile(設置視頻編碼profile).** <pre>please set before SmartPublisherStart while after SmartPublisherOpen.</pre>** profile: the software video encoder profile, range with (1,3).* * 1: baseline profile* 2: main profile* 3: high profile** @return {0} if successful*/public native int SmartPublisherSetSWVideoEncoderProfile(long handle, int profile);/*** Set software video encoder speed(設置視頻軟編碼編碼速度)* * <pre>please set before SmartPublisherStart while after SmartPublisherOpen.</pre>* * @param speed: range with(1, 6), the default speed is 6. * * if with 1, CPU is lowest.* if with 6, CPU is highest.* * @return {0} if successful*/public native int SmartPublisherSetSWVideoEncoderSpeed(long handle, int speed);

7. 設置audio編碼類型，如AAC編碼、Speex編碼，并設置如AAC編碼碼率等參數：

/*** Set audio encoder type(設置音頻編碼類型)* * @param type: if with 1:AAC, if with 2: SPEEX* * @return {0} if successful*/public native int SmartPublisherSetAudioCodecType(long handle, int type);/*** Set audio encoder bit-rate(設置音頻編碼碼率), 當前只對AAC編碼有效** @param kbit_rate: 碼率(單位是kbps), 如果是0的話將使用默認碼率, 必須大于等于0** @return {0} if successful*/public native int SmartPublisherSetAudioBitRate(long handle, int kbit_rate);/*** Set speex encoder quality(設置speex編碼質量)* * @param quality: range with (0, 10), default value is 8* * @return {0} if successful*/public native int SmartPublisherSetSpeexEncoderQuality(long handle, int quality);

8. 音頻處理，如自動增益控制、噪音抑制：

/*** Set Audio Noise Suppression(設置音頻噪音抑制)* * @param isNS: if with 1:suppress, if with 0: does not suppress* * @return {0} if successful*/public native int SmartPublisherSetNoiseSuppression(long handle, int isNS);/*** Set Audio AGC(設置音頻自動增益控制)* * @param isAGC: if with 1:AGC, if with 0: does not AGC* * @return {0} if successful*/public native int SmartPublisherSetAGC(long handle, int isAGC);

9. 音頻混音接口設置：

/*** 設置混音,目前支持兩路音頻混音** @param is_mix: 1混音, 0不混音, 默認不混音** @return {0} if successful*/public native int SmartPublisherSetAudioMix(long handle, int is_mix);

10. 實時靜音設置：

/*** Set mute or not during publish stream(設置實時靜音)* * @param isMute: if with 1:mute, if with 0: does not mute* * @return {0} if successful*/public native int SmartPublisherSetMute(long handle, int isMute);

11. 音量調整：

/*** 設置輸入音量, 這個接口一般不建議調用, 在一些特殊情況下可能會用, 一般不建議放大音量** @param index: 一般是0和1, 如果沒有混音的只用0, 有混音的話, 0,1分別設置音量** @param volume: 音量，默認是1.0，范圍是[0.0, 5.0], 設置成0靜音, 1音量不變** @return {0} if successful*/public native int SmartPublisherSetInputAudioVolume(long handle, int index, float volume);

12. 前置攝像頭鏡像：

/*** Set mirror(設置前置攝像頭鏡像)* * @param isMirror: if with 1:mirror mode, if with 0: normal mode* * Please note when with "mirror mode", the publisher and player with the same echo direction* * @return {0} if successful*/public native int SmartPublisherSetMirror(long handle, int isMirror);

13. 錄像相關配置，如只錄制音頻或視頻，單個文件最大size，錄像存放目錄，開始/暫停/停止錄像：

/*** 音頻錄制開關, 目的是為了更細粒度的去控制錄像, 一般不需要調用這個接口, 這個接口使用場景比如同時推送音視頻，但只想錄制視頻，可以調用這個接口關閉音頻錄制** @param is_recoder: 0: do not recorder; 1: recorder; sdk默認是1** @return {0} if successful*/public native int SmartPublisherSetRecorderAudio(long handle, int is_recoder);/*** 視頻錄制開關, 目的是為了更細粒度的去控制錄像, 一般不需要調用這個接口, 這個接口使用場景比如同時推送音視頻，但只想錄制音頻，可以調用這個接口關閉視頻錄制** @param is_recoder: 0: do not recorder; 1: recorder; sdk默認是1** @return {0} if successful*/public native int SmartPublisherSetRecorderVideo(long handle, int is_recoder);/*** Create file directory(創建錄像存放目錄)* * @param path, E.g: /sdcard/daniulive/rec* * <pre> The interface is only used for recording the stream data to local side. </pre> * * @return {0} if successful*/public native int SmartPublisherCreateFileDirectory(String path);/*** Set recorder directory(設置錄像存放目錄)* * @param path: the directory of recorder file.* * <pre> NOTE: make sure the path should be existed, or else the setting failed. </pre>* * @return {0} if successful*/public native int SmartPublisherSetRecorderDirectory(long handle, String path);/*** Set the size of every recorded file(設置單個錄像文件大小，如超過最大文件大小，自動切換到下個文件錄制)* * @param size: (MB), (5M~500M), if not in this range, set default size with 200MB.* * @return {0} if successful*/public native int SmartPublisherSetRecorderFileMaxSize(long handle, int size);/*** Start recorder(開始錄像)** @return {0} if successful*/public native int SmartPublisherStartRecorder(long handle);/*** Pause recorder(暫停/恢復錄像)** is_pause: 1表示暫停, 0表示恢復錄像, 輸入其他值將調用失敗** @return {0} if successful*/public native int SmartPublisherPauseRecorder(long handle, int is_pause);/*** Stop recorder(停止錄像)** @return {0} if successful*/public native int SmartPublisherStopRecorder(long handle);

14. 實時快照：

/*** Set if needs to save image during publishing stream(設置是否啟用快照)** @param is_save_image: if with 1, it will save current image via the interface of SmartPlayerSaveImage(), if with 0: does not it** @return {0} if successful*/public native int SmartPublisherSaveImageFlag(long handle, int is_save_image);/*** Save current image during publishing stream(實時快照)** @param imageName: image name, which including fully path, "/sdcard/daniuliveimage/daniu.png", etc.** @return {0} if successful*/public native int SmartPublisherSaveCurImage(long handle, String imageName);

15. 設置推送的RTMP URL：

/*** Set rtmp publish stream url(設置推送的RTMP url)** @param url: rtmp publish url.** @return {0} if successful*/public native int SmartPublisherSetURL(long handle, String url);

16.?Android攝像頭前后camera通過OnPreviewFrame()回調的數據接口：

@Overridepublic void onPreviewFrame(byte[] data, Camera camera) {frameCount++;if (frameCount % 3000 == 0) {Log.i("OnPre", "gc+");System.gc();Log.i("OnPre", "gc-");}if (data == null) {Parameters params = camera.getParameters();Size size = params.getPreviewSize();int bufferSize = (((size.width | 0x1f) + 1) * size.height * ImageFormat.getBitsPerPixel(params.getPreviewFormat())) / 8;camera.addCallbackBuffer(new byte[bufferSize]);} else {if (isRTSPPublisherRunning || isPushingRtmp || isRecording || isPushingRtsp) {libPublisher.SmartPublisherOnCaptureVideoData(publisherHandle, data, data.length, currentCameraType, currentOrigentation);}camera.addCallbackBuffer(data);}}

?對應接口定義：

/*** Set live video data(no encoded data).** @param cameraType: CAMERA_FACING_BACK with 0, CAMERA_FACING_FRONT with 1*?* @param curOrg:* PORTRAIT = 1;????//豎屏* LANDSCAPE = 2;????//橫屏 home鍵在右邊的情況* LANDSCAPE_LEFT_HOME_KEY = 3; //橫屏 home鍵在左邊的情況** @return {0} if successful*/public native int SmartPublisherOnCaptureVideoData(long handle, byte[] data, int len, int cameraType, int curOrg);

17. 部分定制設備，只支持YV12的數據：

????/*** YV12數據接口** @param data: YV12 data** @param width: 圖像寬** @param height: 圖像高** @param y_stride: ?y面步長** @param v_stride: v面步長** @param u_stride: u面步長** rotation_degree: 順時針旋轉, 必須是0, 90, 180, 270** @return {0} if successful*/public native int SmartPublisherOnYV12Data(long handle, byte[] data, int width, int height, int y_stride, ?int v_stride, int u_stride, int rotation_degree);

18. 支持NV21數據接口：

nv21數據接口，除了用于常規的camera數據接入外，部分定制攝像頭出來的數據發生翻轉，這個接口也支持。

????/*** NV21數據接口** @param data: nv21 data** @param len: data length** @param width: 圖像寬** @param height: 圖像高** @param y_stride: ?y面步長** @param uv_stride: ?uv面步長** rotation_degree: 順時針旋轉, 必須是0, 90, 180, 270** @return {0} if successful*/public native int SmartPublisherOnNV21Data(long handle, byte[] data, int len, int width, int height, int y_stride, ?int uv_stride, int rotation_degree);/*** NV21數據接口** @param data: nv21 data** @param len: data length** @param width: 圖像寬** @param height: 圖像高** @param y_stride: ?y面步長** @param uv_stride: ?uv面步長** rotation_degree: 順時針旋轉, 必須是0, 90, 180, 270** @param ?is_vertical_flip: 是否垂直翻轉, 0不翻轉, 1翻轉** @param ?is_horizontal_flip：是否水平翻轉, 0不翻轉, 1翻轉** @return {0} if successful*/public native int SmartPublisherOnNV21DataV2(long handle, byte[] data, int len, int width, int height, int y_stride, ?int uv_stride, int rotation_degree,int is_vertical_flip, int is_horizontal_flip);

19. 支持YUV數據接入：

????/*** Set live video data(no encoded data).** @param data: I420 data*?* @param len: I420 data length*?* @param yStride: y stride*?* @param uStride: u stride*?* @param vStride: v stride** @return {0} if successful*/public native int SmartPublisherOnCaptureVideoI420Data(long handle, ?byte[] data, int len, int yStride, int uStride, int vStride);

20. 支持RGBA數據接入（支持裁剪后數據接入，主要用于同屏場景）：

????/*** Set live video data(no encoded data).** @param data: RGBA data*?* @param rowStride: stride information*?* @param width: width*?* @param height: height** @return {0} if successful*/public native int SmartPublisherOnCaptureVideoRGBAData(long handle, ?ByteBuffer data, int rowStride, int width, int height);/*** 投遞裁剪過的RGBA數據** @param data: RGBA data** @param rowStride: stride information** @param width: width** @param height: height** @param clipedLeft: 左; ?clipedTop: 上; clipedwidth: 裁剪后的寬; clipedHeight: 裁剪后的高; 確保傳下去裁剪后的寬、高均為偶數** @return {0} if successful*/public native int SmartPublisherOnCaptureVideoClipedRGBAData(long handle, ?ByteBuffer data, int rowStride, int width, int height, int clipedLeft, int clipedTop, int clipedWidth, int clipedHeight);/*** Set live video data(no encoded data).** @param data: ABGR flip vertical(垂直翻轉) data** @param rowStride: stride information** @param width: width** @param height: height** @return {0} if successful*/public native int SmartPublisherOnCaptureVideoABGRFlipVerticalData(long handle, ?ByteBuffer data, int rowStride, int width, int height);

21. 支持RGB565數據接入（主要用于同屏場景）：

????/*** Set live video data(no encoded data).** @param data: RGB565 data** @param row_stride: stride information** @param width: width** @param height: height** @return {0} if successful*/public native int SmartPublisherOnCaptureVideoRGB565Data(long handle,ByteBuffer data, int row_stride, int width, int height);

22.?支持camera數據接入（主要用于camera2接口對接）：
????

/** ?專門為android.media.Image的android.graphics.ImageFormat.YUV_420_888格式提供的接口** @param ?width: 必須是8的倍數** @param ?height: 必須是8的倍數** @param ?crop_left: 剪切左上角水平坐標, 一般根據android.media.Image.getCropRect() 填充** @param ?crop_top: 剪切左上角垂直坐標, 一般根據android.media.Image.getCropRect() 填充** @param ?crop_width: 必須是8的倍數, 填0將忽略這個參數, 一般根據android.media.Image.getCropRect() 填充** @param ?crop_height: 必須是8的倍數, 填0將忽略這個參數，一般根據android.media.Image.getCropRect() 填充** @param y_plane 對應android.media.Image.Plane[0].getBuffer()** @param y_row_stride 對應android.media.Image.Plane[0].getRowStride()** @param u_plane 對應android.media.Image.Plane[1].getBuffer()** @param v_plane 對應android.media.Image.Plane[2].getBuffer()** @param uv_row_stride 對應android.media.Image.Plane[1].getRowStride()** @param uv_pixel_stride 對應android.media.Image.Plane[1].getPixelStride()** @param ?rotation_degree: 順時針旋轉, 必須是0, 90, 180, 270** @param ?is_vertical_flip: 是否垂直翻轉, 0不翻轉, 1翻轉** @param ?is_horizontal_flip：是否水平翻轉, 0不翻轉, 1翻轉** @param ?scale_width: 縮放寬，必須是8的倍數, 0不縮放** @param ?scale_height: 縮放高, 必須是8的倍數, 0不縮放** @param ?scale_filter_mode: 縮放質量, 范圍必須是[1,3], 傳0使用默認速度** @return {0} if successful*/public native int SmartPublisherOnImageYUV420888(long handle, int width, int height,int crop_left, int crop_top, int crop_width, int crop_height,ByteBuffer y_plane, int y_row_stride,ByteBuffer u_plane, ByteBuffer v_plane, int uv_row_stride, int uv_pixel_stride,int rotation_degree, int is_vertical_flip, int is_horizontal_flip,int scale_width, int scale_height, int scale_filter_mode);

23.?支持PCM數據接入：
?

????/*** 傳遞PCM音頻數據給SDK, 每10ms音頻數據傳入一次*?* ?@param pcmdata: pcm數據, 需要使用ByteBuffer.allocateDirect分配, ByteBuffer.isDirect()是true的才行.* ?@param size: pcm數據大小* ?@param sample_rate: 采樣率，當前只支持{44100, 8000, 16000, 24000, 32000, 48000}, 推薦44100* ?@param channel: 通道, 當前通道支持單通道(1)和雙通道(2)，推薦單通道(1)* ?@param per_channel_sample_number: 這個請傳入的是 sample_rate/100*/public native int SmartPublisherOnPCMData(long handle, ByteBuffer pcmdata, int size, int sample_rate, int channel, int per_channel_sample_number);/*** 傳遞PCM音頻數據給SDK, 每10ms音頻數據傳入一次** ?@param pcmdata: pcm數據, 需要使用ByteBuffer.allocateDirect分配, ByteBuffer.isDirect()是true的才行.* ?@param offset: pcmdata的偏移* ?@param size: pcm數據大小* ?@param sample_rate: 采樣率，當前只支持{44100, 8000, 16000, 24000, 32000, 48000}, 推薦44100* ?@param channel: 通道, 當前通道支持單通道(1)和雙通道(2)，推薦單通道(1)* ?@param per_channel_sample_number: 這個請傳入的是 sample_rate/100*/public native int SmartPublisherOnPCMDataV2(long handle, ByteBuffer pcmdata, int offset, int size, int sample_rate, int channel, int per_channel_sample_number);/*** 傳遞PCM音頻數據給SDK, 每10ms音頻數據傳入一次** ?@param pcm_short_array: pcm數據, short是native endian order* ?@param offset: 數組偏移* ?@param len: 數組項數* ?@param sample_rate: 采樣率，當前只支持{44100, 8000, 16000, 24000, 32000, 48000}, 推薦44100* ?@param channel: 通道, 當前通道支持單通道(1)和雙通道(2)，推薦單通道(1)* ?@param per_channel_sample_number: 這個請傳入的是 sample_rate/100*/public native int SmartPublisherOnPCMShortArray(long handle, short[] pcm_short_array, int offset, int len, int sample_rate, int channel, int per_channel_sample_number);

24.?支持遠端PCM數據接入和混音后PCM數據接入（主要用于一對一互動）：? ??

/*** Set far end pcm data*?* @param pcmdata : 16bit pcm data* @param sampleRate: audio sample rate* @param channel: auido channel* @param per_channel_sample_number: per channel sample numbers* @param is_low_latency: if with 0, it is not low_latency, if with 1, it is low_latency* @return {0} if successful*/public native int SmartPublisherOnFarEndPCMData(long handle, ?ByteBuffer pcmdata, int sampleRate, int channel, int per_channel_sample_number, int is_low_latency);/*** 傳遞PCM混音音頻數據給SDK, 每10ms音頻數據傳入一次** ?@param stream_index: 當前只能傳1, 傳其他返回錯誤* ?@param pcm_data: pcm數據, 需要使用ByteBuffer.allocateDirect分配, ByteBuffer.isDirect()是true的才行.* ?@param offset: pcmdata的偏移* ?@param size: pcm數據大小* ?@param sample_rate: 采樣率，當前只支持{44100, 8000, 16000, 24000, 32000, 48000}* ?@param channels: 通道, 當前通道支持單通道(1)和雙通道(2)* ?@param per_channel_sample_number: 這個請傳入的是 sample_rate/100*/public native int SmartPublisherOnMixPCMData(long handle, int stream_index, ByteBuffer pcm_data, int offset, int size, int sample_rate, int channels, int per_channel_sample_number);/*** 傳遞PCM混音音頻數據給SDK, 每10ms音頻數據傳入一次** ?@param stream_index: 當前只能傳1, 傳其他返回錯誤* ?@param pcm_short_array: pcm數據, short是native endian order* ?@param offset: 數組偏移* ?@param len: 數組項數* ?@param sample_rate: 采樣率，當前只支持{44100, 8000, 16000, 24000, 32000, 48000}* ?@param channels: 通道, 當前通道支持單通道(1)和雙通道(2)* ?@param per_channel_sample_number: 這個請傳入的是 sample_rate/100*/public native int SmartPublisherOnMixPCMShortArray(long handle, int stream_index, short[] pcm_short_array, int offset, int len, int sample_rate, int channels, int per_channel_sample_number);

25. H264擴展SEI消息：

/*** 設置發送隊列大小，為保證實時性，默認大小為3, 必須設置一個大于0的數** @param max_size: 隊列最大長度** @param reserve: 保留字段** NOTE: 1. 如果數據超過隊列大小，將丟掉隊頭數據; 2. 這個接口請在 StartPublisher 之前調用** @return {0} if successful*/public native int SmartPublisherSetPostUserDataQueueMaxSize(long handle, int max_size, int reserve);/*** 清空用戶數據隊列, 有些情況可能會用到，比如發送隊列里面有4條消息再等待發送,又想把最新的消息快速發出去, 可以先清除掉正在排隊消息, 再調用PostUserXXX** @return {0} if successful*/public native int SmartPublisherClearPostUserDataQueue(long handle);/*** 發送二進制數據** NOTE:* 1.目前數據大小限制在256個字節以內，太大可能會影響視頻傳輸，如果有特殊需求，需要增大限制，請聯系我們* 2. 如果積累的數據超過了設置的隊列大小，之前的隊頭數據將被丟棄* 3. 必須再調用StartPublisher之后再發送數據** @param data: 二進制數據** @param size: 數據大小** @param reserve: 保留字段** @return {0} if successful*/public native int SmartPublisherPostUserData(long handle, byte[] data, int size, int reserve);/*** 發送utf8字符串** NOTE:* 1. 字符串長度不能超過256, 太大可能會影響視頻傳輸，如果有特殊需求，需要增大限制，請聯系我們* 2. 如果積累的數據超過了設置的隊列大小，之前的隊頭數據將被丟棄* 3. 必須再調用StartPublisher之后再發送數據** @param utf8_str: utf8字符串** @param reserve: 保留字段** @return {0} if successful*/public native int SmartPublisherPostUserUTF8StringData(long handle, String utf8_str, int reserve);

26. 關閉推送實例：

/*** 關閉推送實例，結束時必須調用close接口釋放資源** @return {0} if successful*/public native int SmartPublisherClose(long handle);

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