media/gpu/vaapi: batch submitting VABufferIDs for MJPEG decoding

This CL follows crrev.com/c/2393629 by batching up SubmitBuffer
calls in the JPEG decode accelerator, used e.g. for MJPEG camera
stream decoding.

This was verified via chrome:tracing while capturing HD on kohaku
and reks (Braswell) in the link [1]. Similarly to what is seen in
the previous CL, the combination of SubmitBuffer() calls on ToT
is ~10% slower than the batched SubmitBuffers(). A key difference
is that since JPEG is way simpler than e.g. VP9, the submitting
time is comparable to the ExecuteBuffers_Locked(), so this CL
has some minor overall decode-time savings. But still the target
here is to reduce contention on the lock and libva for video
conferencing cases with multiple remote participants a la Meet.

[1] webrtc.github.io/samples/src/content/getusermedia/resolution/

Cq-Depend: chromium:2393629
Bug: b/166646505
Change-Id: I183cc151de24d8fdbdc62e0172be296dacbf26f2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2393525
Commit-Queue: Miguel Casas <mcasas@chromium.org>
Reviewed-by: J Kardatzke <jkardatzke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#805557}

media/gpu/vaapi/vaapi_jpeg_decoder.cc

@@ -349,45 +349,27 @@ bool VaapiJpegDecoder::SubmitBuffers(const JpegParseResult& parse_result) {
   // Set picture parameters.
   VAPictureParameterBufferJPEGBaseline pic_param{};
   FillPictureParameters(parse_result.frame_header, &pic_param);
-  if (!vaapi_wrapper_->SubmitBuffer(VAPictureParameterBufferType, &pic_param)) {
-    VLOGF(1) << "Could not submit VAPictureParameterBufferType";
-    return false;
-  }
 
   // Set quantization table.
   VAIQMatrixBufferJPEGBaseline iq_matrix{};
   FillIQMatrix(parse_result.q_table, &iq_matrix);
-  if (!vaapi_wrapper_->SubmitBuffer(VAIQMatrixBufferType, &iq_matrix)) {
-    VLOGF(1) << "Could not submit VAIQMatrixBufferType";
-    return false;
-  }
 
   // Set huffman table.
   VAHuffmanTableBufferJPEGBaseline huffman_table{};
   FillHuffmanTable(parse_result.dc_table, parse_result.ac_table,
                    &huffman_table);
-  if (!vaapi_wrapper_->SubmitBuffer(VAHuffmanTableBufferType, &huffman_table)) {
-    VLOGF(1) << "Could not submit VAHuffmanTableBufferType";
-    return false;
-  }
 
   // Set slice parameters.
   VASliceParameterBufferJPEGBaseline slice_param{};
   FillSliceParameters(parse_result, &slice_param);
-  if (!vaapi_wrapper_->SubmitBuffer(VASliceParameterBufferType, &slice_param)) {
-    VLOGF(1) << "Could not submit VASliceParameterBufferType";
-    return false;
-  }
-
-  // Set scan data.
-  if (!vaapi_wrapper_->SubmitBuffer(VASliceDataBufferType,
-                                    parse_result.data_size,
-                                    const_cast<char*>(parse_result.data))) {
-    VLOGF(1) << "Could not submit VASliceDataBufferType";
-    return false;
-  }
 
-  return true;
+  return vaapi_wrapper_->SubmitBuffers(
+      {{VAPictureParameterBufferType, sizeof(pic_param), &pic_param},
+       {VAIQMatrixBufferType, sizeof(iq_matrix), &iq_matrix},
+       {VAHuffmanTableBufferType, sizeof(huffman_table), &huffman_table},
+       {VASliceParameterBufferType, sizeof(slice_param), &slice_param},
+       {VASliceDataBufferType, parse_result.data_size,
+        const_cast<char*>(parse_result.data)}});
 }
 
 }  // namespace media