rocDecode: Added decode buffer pool implementation for AVC and HEVC. (#355)

* * rocDecode: Initial check in for decode buffer pool.

* * rocDecode: All 135 streams pass.

* * rocDecode: Fixed a build error in debug mode.

* * rocDecode/HEVC: Removed two workaround in HEVC DPB management, after decode buffer pool implementa
tion.
 - WR 1: Conditional bumping (when max_num_reorder_pics > 0) to avoid synchronous job submission in
C.5.2.3.
 - WR 2: Add two more buffers in DPB to avoid buffer over-writing.

* * rocDecode/HEVC: Added display delay feature.

* * rocDecode/HEVC: Fixed the -z option issue within the context of the new decode buffer pool implementation.

* * rocDecode/HEVC: Removed redundent code.

* * rocDecode/AVC: Added decode buffer pool implementation for AVC.

* * rocDecode: Added a few changes.
 - Added display delay feature to AVC.
 - Removed a workaround for AVC: AVC_MAX_DPB_FRAMES was increased to 18. Now it is back to 16.
 - Removed a workaround for AVC: increased DPB buffer size by 2. Now it is back to normal.
 - Code format changes for HEVC.

* * rocDecode/AVC: Fixed the -z option issue within the context of the new decode buffer pool implementation.

* * rocDecode: Merged OutputDecodedPictures() method to upper class RocVideoParser.

* * rocDecode: Code cleanup. No functional changes.

* * rocDecode: Made decode buffer pool size adaptive.
 - Removed the hard coded decode buffer pool size set in the decoder.
 - Exposed the display delay parameter from RocVideoDecoder class to the user.
 - Now the decoder buffer pool size is determined from the DPB buffer size and display delay parameter.

* * rocDecode: Several changes based on code review.
 - Merged decode and display use status into one parameter.
 - Removed the surface index from DecodeFrameBuffer, which is now implicitly referred by the array index.
 - Changed a function name for better clarity.

* * rocDecode: Added a comment.

[ROCm/rocdecode commit: 61c8661b9c]

projects/rocdecode/samples/videoDecode/videodecode.cpp

@@ -47,6 +47,7 @@ void ShowHelpAndExit(const char *option = NULL) {
     << "-d GPU device ID (0 for the first device, 1 for the second, etc.); optional; default: 0" << std::endl
     << "-f Number of decoded frames - specify the number of pictures to be decoded; optional" << std::endl
     << "-z force_zero_latency (force_zero_latency, Decoded frames will be flushed out for display immediately); optional;" << std::endl
+    << "-disp_delay -specify the number of frames to be delayed for display; optional;" << std::endl
     << "-sei extract SEI messages; optional;" << std::endl
     << "-md5 generate MD5 message digest on the decoded YUV image sequence; optional;" << std::endl
     << "-md5_check MD5 File Path - generate MD5 message digest on the decoded YUV image sequence and compare to the reference MD5 string in a file; optional;" << std::endl
@@ -66,6 +67,7 @@ int main(int argc, char **argv) {
     std::fstream ref_md5_file;
     int dump_output_frames = 0;
     int device_id = 0;
+    int disp_delay = 0;
     bool b_force_zero_latency = false;     // false by default: enabling this option might affect decoding performance
     bool b_extract_sei_messages = false;
     bool b_generate_md5 = false;
@@ -111,6 +113,13 @@ int main(int argc, char **argv) {
             device_id = atoi(argv[i]);
             continue;
         }
+        if (!strcmp(argv[i], "-disp_delay")) {
+            if (++i == argc) {
+                ShowHelpAndExit("-disp_delay");
+            }
+            disp_delay = atoi(argv[i]);
+            continue;
+        }
         if (!strcmp(argv[i], "-f")) {
             if (++i == argc) {
                 ShowHelpAndExit("-d");
@@ -197,7 +206,7 @@ int main(int argc, char **argv) {
         VideoDemuxer demuxer(input_file_path.c_str());
         VideoSeekContext video_seek_ctx;
         rocDecVideoCodec rocdec_codec_id = AVCodec2RocDecVideoCodec(demuxer.GetCodecID());
-        RocVideoDecoder viddec(device_id, mem_type, rocdec_codec_id, b_force_zero_latency, p_crop_rect, b_extract_sei_messages);
+        RocVideoDecoder viddec(device_id, mem_type, rocdec_codec_id, b_force_zero_latency, p_crop_rect, b_extract_sei_messages, disp_delay);
 
         std::string device_name, gcn_arch_name;
         int pci_bus_id, pci_domain_id, pci_device_id;