Android如何回撥編碼後的音視訊資料

daniulivesdk發表於2018-11-05

有開發者提到,在RTMP推送端的基礎上,希望能回撥編碼後的音視訊資料,便於開發者對接第三方系統,如GB28181.

為此,我們加了一下介面:

1. 設定音視訊callback

對應介面:

	/**
	 * Set Audio Encoded Data Callback.
	 *
	 * @param audio_encoded_data_callback: Audio Encoded Data Callback.
	 *
	 * @return {0} if successful
	 */
	public native int SmartPublisherSetAudioEncodedDataCallback(long handle, Object audio_encoded_data_callback);

	/**
	 * Set Video Encoded Data Callback.
	 *
	 * @param video_encoded_data_callback: Video Encoded Data Callback.
	 *
	 * @return {0} if successful
	 */
	public native int SmartPublisherSetVideoEncodedDataCallback(long handle, Object video_encoded_data_callback);

設定回撥:

libPublisher.SmartPublisherSetAudioEncodedDataCallback(publisherHandle, new PublisherAudioEncodedDataCallback());

libPublisher.SmartPublisherSetVideoEncodedDataCallback(publisherHandle, new PublisherVideoEncodedDataCallback());

2. 實現 PublisherAudioEncodedDataCallback 和 PublisherVideoEncodedDataCallback:

    class PublisherAudioEncodedDataCallback implements NTAudioDataCallback
    {
        private int audio_buffer_size = 0;
        private int param_info_size = 0;

        private ByteBuffer audio_buffer_ = null;
        private ByteBuffer parameter_info_ = null;

        @Override
        public ByteBuffer getAudioByteBuffer(int size)
        {
            //Log.i("getAudioByteBuffer", "size: " + size);

            if( size < 1 )
            {
                return null;
            }

            if ( size <= audio_buffer_size && audio_buffer_ != null )
            {
                return audio_buffer_;
            }

            audio_buffer_size = size + 512;
            audio_buffer_size = (audio_buffer_size+0xf) & (~0xf);

            audio_buffer_ = ByteBuffer.allocateDirect(audio_buffer_size);

            // Log.i("getAudioByteBuffer", "size: " + size + " buffer_size:" + audio_buffer_size);

            return audio_buffer_;
        }

        @Override
        public ByteBuffer getAudioParameterInfo(int size)
        {
            //Log.i("getAudioParameterInfo", "size: " + size);

            if(size < 1)
            {
                return null;
            }

            if ( size <= param_info_size &&  parameter_info_ != null )
            {
                return  parameter_info_;
            }

            param_info_size = size + 32;
            param_info_size = (param_info_size+0xf) & (~0xf);

            parameter_info_ = ByteBuffer.allocateDirect(param_info_size);

            //Log.i("getAudioParameterInfo", "size: " + size + " buffer_size:" + param_info_size);

            return parameter_info_;
        }

        public void onAudioDataCallback(int ret, int audio_codec_id, int sample_size, int is_key_frame, long timestamp, int sample_rate, int channel, int parameter_info_size, long reserve)
        {
            Log.i("onAudioDataCallback", "ret: " + ret + ", audio_codec_id: " + audio_codec_id + ", sample_size: " + sample_size + ", timestamp: " + timestamp +
            		",sample_rate:" + sample_rate + ",chn: " + channel + ", parameter_info_size:" + parameter_info_size);

            if ( audio_buffer_ == null)
                return;

            audio_buffer_.rewind();

            if ( ret == 0 && publisherHandle2 != 0 ) {
                libPublisher.SmartPublisherPostAudioEncodedData(publisherHandle2, audio_codec_id, audio_buffer_, sample_size, is_key_frame, timestamp, parameter_info_, parameter_info_size);
            }
        }
    }

    class PublisherVideoEncodedDataCallback implements NTVideoDataCallback
    {
        private int video_buffer_size = 0;

        private ByteBuffer video_buffer_ = null;

        @Override
        public ByteBuffer getVideoByteBuffer(int size)
        {
            //Log.i("getVideoByteBuffer", "size: " + size);

            if( size < 1 )
            {
                return null;
            }

            if ( size <= video_buffer_size &&  video_buffer_ != null )
            {
                return  video_buffer_;
            }

            video_buffer_size = size + 1024;
            video_buffer_size = (video_buffer_size+0xf) & (~0xf);

            video_buffer_ = ByteBuffer.allocateDirect(video_buffer_size);

            // Log.i("getVideoByteBuffer", "size: " + size + " buffer_size:" + video_buffer_size);

            return video_buffer_;
        }

        public void onVideoDataCallback(int ret, int video_codec_id, int sample_size, int is_key_frame, long timestamp, int width, int height, long presentation_timestamp)
        {
            Log.i("onVideoDataCallback", "ret: " + ret + ", video_codec_id: " + video_codec_id + ", sample_size: " + sample_size + ", is_key_frame: "+ is_key_frame +  ", timestamp: " + timestamp +
            		",width: " + width + ", height:" + height + ",presentation_timestamp:" + presentation_timestamp);

            if ( video_buffer_ == null)
                return;

            video_buffer_.rewind();

            if ( ret == 0 && publisherHandle2 !=0 ) {

                libPublisher.SmartPublisherPostVideoEncodedData(publisherHandle2, video_codec_id, video_buffer_, sample_size, is_key_frame, timestamp, presentation_timestamp);
            }
        }
    }

3. 提供開始回撥資料和停止回撥資料介面:

	/**
	 * Start output Encoded Data(用於編碼後的音視訊資料回撥)
	 *
	 * @return {0} if successful
	 */
	public native int SmartPublisherStartOutputEncodedData(long handle);

	/**
	 *  Stop output Encoded Data
	 *
	 * @return {0} if successful
	 */
	public native int SmartPublisherStopOutputEncodedData(long handle);

4. 上層demo呼叫例項:

    class ButtonEncodedDataCallbackListener implements OnClickListener {
        public void onClick(View v) {
            if (isEncodedDatacallbackRunning) {
                stopEncodedDataCallback();

                if (!isPushing && !isRTSPPublisherRunning && !isRecording) {
                    ConfigControlEnable(true);
                }

                btnEncodedDataCallback.setText("啟動編碼資料回撥");
                isEncodedDatacallbackRunning = false;

                if (publisherHandle2 != 0) {
                   libPublisher.SmartPublisherStopPublisher(publisherHandle2);
                    libPublisher.SmartPublisherClose(publisherHandle2);
                    publisherHandle2 = 0;
                }

                return;
            }

            Log.i(TAG, "onClick start encoded data callback..");

            if (libPublisher == null)
                return;

            if (!isPushing && !isRTSPPublisherRunning && !isRecording) {
                InitAndSetConfig();
            }

            libPublisher.SmartPublisherSetAudioEncodedDataCallback(publisherHandle, new PublisherAudioEncodedDataCallback());
            libPublisher.SmartPublisherSetVideoEncodedDataCallback(publisherHandle, new PublisherVideoEncodedDataCallback());

            int startRet = libPublisher.SmartPublisherStartOutputEncodedData(publisherHandle);
            if (startRet != 0) {
                isEncodedDatacallbackRunning = false;

                Log.e(TAG, "Failed to start encoded data callback.");
                return;
            }

            if (!isPushing && !isRTSPPublisherRunning && !isRecording) {
                if (pushType == 0 || pushType == 1) {
                    CheckInitAudioRecorder();    //enable pure video publisher..
                }

                ConfigControlEnable(false);
            }

            btnEncodedDataCallback.setText("停止編碼資料回撥");
            isEncodedDatacallbackRunning = true;

            int audio_opt = 2;
            int video_opt = 2;

            publisherHandle2 = libPublisher.SmartPublisherOpen(myContext, audio_opt, video_opt,
                    videoWidth, videoHeight);

            if (publisherHandle2 == 0) {
                Log.e(TAG, "sdk open failed!");
                return;
            }

            String relayUrl = "rtmp://player.daniulive.com:1935/hls/stream8888";

            libPublisher.SmartPublisherSetURL(publisherHandle2, relayUrl);

            libPublisher.SmartPublisherStartPublisher(publisherHandle2);
        }
    }

    ;
    //停止編碼後資料回撥
    private void stopEncodedDataCallback() {
        if(!isEncodedDatacallbackRunning)
        {
            return;
        }
        if (!isPushing && !isRTSPPublisherRunning && !isRecording) {
            if (audioRecord_ != null) {
                Log.i(TAG, "stopRecorder, call audioRecord_.StopRecording..");

                audioRecord_.Stop();

                if (audioRecordCallback_ != null) {
                    audioRecord_.RemoveCallback(audioRecordCallback_);
                    audioRecordCallback_ = null;
                }

                audioRecord_ = null;
            }
        }

        if (libPublisher != null) {
            libPublisher.SmartPublisherStopOutputEncodedData(publisherHandle);
        }

        if (!isPushing && !isRTSPPublisherRunning && !isRecording) {
            if (publisherHandle != 0) {
                if (libPublisher != null) {
                    libPublisher.SmartPublisherClose(publisherHandle);
                    publisherHandle = 0;
                }
            }
        }
    }

此demo為了便於演示方便,另啟動了個新的推送例項,音視訊編碼後的資料,通過新的例項,呼叫編碼後的音視訊資料介面,繼續推RTMP出去。

此Demo的優越性在於,回撥編碼後的音視訊資料功能,可與推RTMP、錄影、內建RTSP服務SDK組合使用,亦可單獨使用。

附錄,目前大牛直播SDK RTMP推送端支援以下功能:

Windows/Android/iOS RTMP直播推流SDK

如不單獨說明,系Windows、Android、iOS全平臺支援。

  •  [視訊採集處理]Windows平臺涵蓋“Windows視訊採集處理SDK”功能;
  •  [音訊採集處理]Windows平臺涵蓋“Windows音訊採集處理SDK”功能;
  •  [本地預覽]Windows平臺支援攝像頭/螢幕/合成資料實時預覽功能,Android/iOS平臺支援本地前後置攝像頭預覽;
  •  [攝像頭反轉/旋轉]Windows平臺支援攝像頭水平反轉、垂直反轉、0°/90°/180°/270°旋轉;
  •  [RTMP推流]超低延時的RTMP協議直播推流SDK(Windows支援RTMP擴充套件H.265推送);
  •  [視訊格式]Windows平臺支援H.264/H.265編碼,Android/iOS平臺支援H.264編碼;
  •  [音訊格式]Windows/Android/iOS平臺支援AAC編碼,Windows/Android平臺支援Speex編碼;
  •  [音訊編碼]Windows/Android平臺支援Speex推送、Speex編碼質量設定;
  •  [H.264硬編碼]Android/iOS支援H.264硬編碼;
  •  [硬編碼碼自適應]Android/iOS平臺支援硬編碼自適應,如檢測到硬編碼不支援,自動切換到軟編;
  •  [編碼引數配置]支援gop間隔、幀率、bit-rate、軟編碼profile、軟編碼速度設定;
  •  [多例項推送]支援多例項推送(如同時推送螢幕/攝像頭和外部資料);
  •  [RTMP擴充套件H.265]Windows推送SDK支援RTMP擴充套件H.265推送,針對攝像頭採集編碼,使用H.265可變位元速率,頻寬大幅節省,效果直逼傳統H.265編碼攝像頭;
  •  [橫豎屏推流]Android/iOS平臺支援支援橫屏、豎屏推流;
  •  [多解析度支援]支援攝像頭或螢幕多種解析度設定;
  •  [Windows推屏]支援螢幕裁剪、視窗採集、螢幕/攝像頭資料合成等多種模式推送;
  •  [移動端推屏]Android平臺支援後臺service推送攝像頭或螢幕(推送螢幕需要5.0+版本);
  •  [移動端推屏]iOS平臺支援後臺推送螢幕(基於ReplayKit,需要iOS 10.0+版本);
  •  [事件回撥]支援各種狀態實時回撥;
  •  [水印]Windows平臺支援文字水印、png水印、實時遮擋,Android平臺支援文字水印、png水印;
  •  [RTMP推送模式]支援RTMP推送 live|record模式設定(需伺服器支援);
  •  [映象]Android/iOS平臺支援前置攝像頭實時映象功能;
  •  [前後攝像頭實時切換]Android/iOS平臺支援採集過程中,前後攝像頭切換;
  •  [複雜網路處理]支援斷網重連等各種網路環境自動適配;
  •  [動態位元速率]支援根據網路情況自動調整推流位元速率;
  •  [實時靜音]支援推送過程中,實時靜音/取消靜音;
  •  [實時快照]支援推流過程中,實時快照;
  •  [純音訊推流]支援僅採集音訊流併發起推流功能;
  •  [純視訊推流]支援特殊場景下的純視訊推流功能;
  •  [降噪]Windows/Android平臺支援環境音、手機干擾等引起的噪音降噪處理、自動增益、VAD檢測;
  •  [迴音消除]android支援實時傳遞遠端PCM資料,方便迴音消除處理;
  •  [外部編碼前視訊資料對接]支援YUV資料對接;
  •  [外部編碼前音訊資料對接]支援PCM對接;
  •  [外部編碼後視訊資料對接]支援外部H.264資料對接;
  •  [外部編碼後音訊資料對接]外部AAC/PCMA/PCMU/SPEEX資料對接;
  •  [編碼後資料輸出]Android平臺支援輸出編碼後的H264/AAC資料到上層,方便對接第三方平臺(如GB28181)對接(介面說明和demo請點選以下連結);
  •  [擴充套件錄影功能]完美支援和錄影SDK組合使用,錄影相關功能,可參見”8. Windows/Android/iOS錄影SDK“;
  •  [基礎美顏]iOS平臺自帶基礎美顏功能;
  •  [裁剪模式]Android/iOS平臺支援特定解析度攝像頭裁剪模式設定;
  •  [伺服器相容]支援支援自建伺服器(如Nginx、SRS)或CDN。

相關Demo:點選下載

相關資料參考:https://github.com/daniulive/SmarterStreaming/

 


相關文章