# native_avcodec_videodecoder.h


## Overview

The **native_avcodec_videodecoder.h** file declares the native APIs used for video decoding.

**Library**: libnative_media_vdec.so

**Since**: 9

**Related module**: [VideoDecoder](_video_decoder.md)


## Summary


### Functions

| Name| Description| 
| -------- | -------- |
| [OH_AVCodec](_codec_base.md#oh_avcodec) \* [OH_VideoDecoder_CreateByMime](_video_decoder.md#oh_videodecoder_createbymime) (const char \*mime) | Creates a video decoder instance based on a Multipurpose Internet Mail Extension (MIME) type.| 
| [OH_AVCodec](_codec_base.md#oh_avcodec) \* [OH_VideoDecoder_CreateByName](_video_decoder.md#oh_videodecoder_createbyname) (const char \*name) | Creates a video decoder instance based on a decoder name.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_Destroy](_video_decoder.md#oh_videodecoder_destroy) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec) | Clears the internal resources of a video decoder and destroys the decoder instance.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_SetCallback](_video_decoder.md#oh_videodecoder_setcallback) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, [OH_AVCodecAsyncCallback](_o_h___a_v_codec_async_callback.md) callback, void \*userData) | Sets an asynchronous callback so that your application can respond to events generated by a video decoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_RegisterCallback](_video_decoder.md#oh_videodecoder_registercallback) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, [OH_AVCodecCallback](_o_h___a_v_codec_callback.md) callback, void \*userData) | Registers an asynchronous callback so that your application can respond to events generated by a video decoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_SetSurface](_video_decoder.md#oh_videodecoder_setsurface) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, [OHNativeWindow](_codec_base.md#ohnativewindow) \*window) | Sets an output surface for a video decoder. |
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_Configure](_video_decoder.md#oh_videodecoder_configure) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, [OH_AVFormat](_core.md#oh_avformat) \*format) | Configures a video decoder. Typically, you need to configure the video track description information that can be extracted from **OH_AVSource**.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_Prepare](_video_decoder.md#oh_videodecoder_prepare) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec) | Prepares internal resources for a video decoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_Start](_video_decoder.md#oh_videodecoder_start) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec) | Starts a video decoder. This function can be called only after the decoder is prepared successfully.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_Stop](_video_decoder.md#oh_videodecoder_stop) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec) | Stops a video decoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_Flush](_video_decoder.md#oh_videodecoder_flush) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec) | Clears the input and output data in the internal buffer of a video decoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_Reset](_video_decoder.md#oh_videodecoder_reset) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec) | Resets a video decoder. To continue decoding, you must call **Configure** to configure the decoder again. | 
| [OH_AVFormat](_core.md#oh_avformat) \* [OH_VideoDecoder_GetOutputDescription](_video_decoder.md#oh_videodecoder_getoutputdescription) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec) | Obtains the description information about the output data of a video decoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_SetParameter](_video_decoder.md#oh_videodecoder_setparameter) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, [OH_AVFormat](_core.md#oh_avformat) \*format) | Sets dynamic parameters for a video decoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_PushInputData](_video_decoder.md#oh_videodecoder_pushinputdata) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, uint32_t index, [OH_AVCodecBufferAttr](_o_h___a_v_codec_buffer_attr.md) attr) | Pushes the input buffer filled with data to a video decoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_RenderOutputData](_video_decoder.md#oh_videodecoder_renderoutputdata) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, uint32_t index) | Frees an output buffer of a video decoder and instructs the decoder to render the decoded data in the buffer on the output surface.|
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_FreeOutputData](_video_decoder.md#oh_videodecoder_freeoutputdata) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, uint32_t index) | Frees an output buffer of a video decoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_PushInputBuffer](_video_decoder.md#oh_videodecoder_pushinputbuffer) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, uint32_t index) | Pushes the input buffer filled with data to a video decoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_RenderOutputBuffer](_video_decoder.md#oh_videodecoder_renderoutputbuffer) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, uint32_t index) | Frees an output buffer of a video decoder and instructs the decoder to render the decoded data in the buffer on the output surface.|
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_RenderOutputBufferAtTime](_video_decoder.md#oh_videodecoder_renderoutputbufferattime) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, uint32_t index, int64_t renderTimestampNs) | Frees an output buffer with a rendering timestamp of a video decoder and instructs the decoder to render the decoded data in the buffer on the output surface. |
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_FreeOutputBuffer](_video_decoder.md#oh_videodecoder_freeoutputbuffer) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, uint32_t index) | Frees an output buffer of a video decoder.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_IsValid](_video_decoder.md#oh_videodecoder_isvalid) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, bool \*isValid) | Checks whether a video decoder instance is valid.| 
| [OH_AVErrCode](_core.md#oh_averrcode) [OH_VideoDecoder_SetDecryptionConfig](_video_decoder.md#oh_videodecoder_setdecryptionconfig) ([OH_AVCodec](_codec_base.md#oh_avcodec) \*codec, MediaKeySession \*mediaKeySession, bool secureVideoPath) | Sets the decryption configuration.|