added api initial implementation

src/rocdecoder.cpp

@@ -19,3 +19,105 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 */
+
+
+#include "rocdecoder.h"
+#include "commons.h"
+
+rocDecoder::rocDecoder(int device_id, int num_devices):device_id_ {device_id}, num_devices_{num_devices} {
+  // todo:: 
+    if (ROCDEC_SUCCESS != initHIP(device_id_)) {
+        THROW("Failed to initilize the HIP");
+    }
+    initDRMnodes();
+
+}
+
+rocDecStatus rocDecoder::getDecoderCaps(ROCDECDECODECAPS *pdc) {
+    // todo:: return appropriate decStatus if fails
+    //vaQueryConfigProfiles
+    // fill the ROCDECDECODECAPS struct
+    // return status
+    return ROCDEC_NOT_IMPLEMENTED;
+}
+
+rocDecStatus rocDecoder::decodeFrame(ROCDECPICPARAMS *pPicParams) {
+    // todo:: return appropriate decStatus if fails
+    // call funsction to do va-api decoding using the picture parameters structure
+    // return status
+    return ROCDEC_NOT_IMPLEMENTED;
+}
+
+rocDecStatus rocDecoder::getDecodeStatus(int nPicIdx, ROCDECGETDECODESTATUS* pDecodeStatus) {
+    // todo:: return appropriate decStatus
+    // init vaapi decoder to get the decoding status of the picture specified by nPicIndex 
+    // return status
+    return ROCDEC_NOT_IMPLEMENTED;
+}
+
+rocDecStatus rocDecoder::reconfigureDecoder(ROCDECRECONFIGUREDECODERINFO *pDecReconfigParams) {
+    // todo:: return appropriate decStatus
+    // this will be called when the current configuration is changed during decoding
+    // release the current va-api decoder instance and create a new one with the new parameters (or reinit if available)
+    // return status
+    return ROCDEC_NOT_IMPLEMENTED;
+}
+
+rocDecStatus rocDecoder::mapVideoFrame(int nPicIdx, void *pDevMemPtr[3],
+                                unsigned int *pHorizontalPitch[3], ROCDECPROCPARAMS *pVidPostprocParams) {
+    // todo:: return appropriate decStatus
+    // Post-process and map video frame corresponding to nPicIdx for use in HIP. Returns HIP device pointer and associated
+    // pitch(horizontal stride) of the video frame. Returns device memory pointers for each plane (Y, U and V) seperately
+    return ROCDEC_NOT_IMPLEMENTED;
+}
+
+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::initHIP(int device_id) {
+    hipError_t hipStatus = hipSuccess;
+    hipStatus = hipGetDeviceCount(&num_devices_);
+    rocDecStatus decStatus = ROCDEC_SUCCESS;
+    if (hipStatus != hipSuccess) {
+        ERR("ERROR: hipGetDeviceCount failed!" + TOSTR(hipStatus));
+        decStatus = ROCDEC_DEVICE_INVALID;
+    }
+    if (num_devices_ < 1) {
+        ERR("ERROR: didn't find any GPU!");
+        decStatus = ROCDEC_DEVICE_INVALID;
+    }
+    if (device_id >= num_devices_) {
+        ERR("ERROR: the requested device_id is not found! ");
+        decStatus = ROCDEC_DEVICE_INVALID;
+    }
+    hipStatus = hipSetDevice(device_id);
+    if (hipStatus != hipSuccess) {
+        ERR("ERROR: hipSetDevice( " + TOSTR(device_id) + ") failed! (" + TOSTR(hipStatus) + ")" );
+        decStatus = ROCDEC_DEVICE_INVALID;
+    }
+
+    hipStatus = hipGetDeviceProperties(&hip_dev_prop_, device_id);
+    if (hipStatus != hipSuccess) {
+        ERR("ERROR: hipGetDeviceProperties for device (" +TOSTR(device_id) + " ) failed! (" + TOSTR(hipStatus) + ")" );
+        decStatus = ROCDEC_DEVICE_INVALID;
+    }
+
+    hipStatus = hipStreamCreate(&hip_stream_);
+    if (hipStatus != hipSuccess) {
+        ERR("ERROR: hipStream_Create failed! (" + TOSTR(hipStatus) + ")");
+        decStatus = ROCDEC_DEVICE_INVALID;
+    }
+    return decStatus;
+}
+
+void rocDecoder::initDRMnodes() {
+    // build the DRM render node names
+    for (int i = 0; i < num_devices_; i++) {
+        drm_nodes_.push_back("/dev/dri/renderD" + std::to_string(128 + i));
+    }
+}
+