Add support for the rocDecUnMapVideoFrame API (#58)

src/rocdecode/roc_decoder.cpp

@@ -123,10 +123,14 @@ rocDecStatus RocDecoder::mapVideoFrame(int pic_idx, void *dev_mem_ptr[3],
     return rocdec_status;
 }
 
-rocDecStatus RocDecoder::unMapVideoFrame(void *pMappedDevPtr) {
-    // todo:: return appropriate decStatus
-    // Unmap a previously mapped video frame with the associated mapped raw pointer (pMappedDevPtr)
-    return ROCDEC_NOT_IMPLEMENTED;
+rocDecStatus RocDecoder::unMapVideoFrame(int pic_idx) {
+    if (pic_idx >= hip_ext_mem_.size()) {
+        return ROCDEC_INVALID_PARAMETER;
+    }
+
+    CHECK_HIP(hipDestroyExternalMemory(hip_ext_mem_[pic_idx]));
+
+    return ROCDEC_SUCCESS;
 }
 
 

src/rocdecode/roc_decoder.h

@@ -51,7 +51,7 @@ public:
     rocDecStatus getDecodeStatus(int nPicIdx, RocdecDecodeStatus* pDecodeStatus);
     rocDecStatus reconfigureDecoder(RocdecReconfigureDecoderInfo *pDecReconfigParams);
     rocDecStatus mapVideoFrame(int pic_idx, void *dev_mem_ptr[3], unsigned int horizontal_pitch[3], RocdecProcParams *vid_postproc_params);
-    rocDecStatus unMapVideoFrame(void *pMappedDevPtr);
+    rocDecStatus unMapVideoFrame(int pic_idx);
 
 private:
     rocDecStatus InitHIP(int device_id);

src/rocdecode/rocdecode_api.cpp

@@ -180,15 +180,15 @@ rocDecMapVideoFrame(rocDecDecoderHandle hDecoder, int nPicIdx,
 }
 
 /*****************************************************************************************************/
-//! \fn rocDecStatus ROCDECAPI rocDecUnMapVideoFrame(rocDecDecoderHandle hDecoder, void *pMappedDevPtr)
-//! Unmap a previously mapped video frame with the associated mapped raw pointer (pMappedDevPtr) 
+//! \fn rocDecStatus ROCDECAPI rocDecUnMapVideoFrame(rocDecDecoderHandle hDecoder, int nPicIdx)
+//! Unmap a previously mapped video frame with the associated nPicIdx
 /*****************************************************************************************************/
 rocDecStatus ROCDECAPI 
-rocDecUnMapVideoFrame(rocDecDecoderHandle hDecoder, void *pMappedDevPtr) {
+rocDecUnMapVideoFrame(rocDecDecoderHandle hDecoder, int pic_idx) {
     auto handle = static_cast<DecHandle *> (hDecoder);
     rocDecStatus ret;
     try {
-        ret = handle->roc_decoder->unMapVideoFrame(pMappedDevPtr);
+        ret = handle->roc_decoder->unMapVideoFrame(pic_idx);
     }
     catch(const std::exception& e) {
         handle->capture_error(e.what());