Add a unique pointer wrapper to the MixGainParamDefinition field with…

…in SubmixRenderingMetadata. This is done in order to make SubmixRenderingMetadata moveable in the non-google environment.

PiperOrigin-RevId: 700377816

iamf/cli/rendering_mix_presentation_finalizer.cc

@@ -755,7 +755,8 @@ absl::Status GenerateRenderingMetadataForSubmixes(  // NOLINT
 
     submix_rendering_metadata.audio_elements_in_sub_mix =
         sub_mix.audio_elements;
-    submix_rendering_metadata.mix_gain = sub_mix.output_mix_gain;
+    submix_rendering_metadata.mix_gain =
+        std::make_unique<MixGainParamDefinition>(sub_mix.output_mix_gain);
 
     // Data common to all audio elements and layouts.
     bool requires_resampling;
@@ -852,10 +853,13 @@ absl::Status RenderWriteAndCalculateLoudnessForTemporalUnit(
         continue;
       }
       std::vector<int32_t> rendered_samples;
+      if (submix_rendering_metadata.mix_gain == nullptr) {
+        return absl::InvalidArgumentError("Submix mix gain is null");
+      }
       RETURN_IF_NOT_OK(RenderAllFramesForLayout(
           layout_rendering_metadata.num_channels,
           submix_rendering_metadata.audio_elements_in_sub_mix,
-          submix_rendering_metadata.mix_gain, id_to_labeled_frame,
+          *submix_rendering_metadata.mix_gain, id_to_labeled_frame,
           layout_rendering_metadata.audio_element_rendering_metadata,
           parameter_blocks_start, parameter_blocks_end,
           submix_rendering_metadata.common_sample_rate, rendered_samples));
@@ -888,10 +892,13 @@ absl::Status RenderWriteAndCalculateLoudnessForTemporalUnit(
         continue;
       }
       std::vector<int32_t> rendered_samples;
+      if (submix_rendering_metadata.mix_gain == nullptr) {
+        return absl::InvalidArgumentError("Submix mix gain is null");
+      }
       RETURN_IF_NOT_OK(RenderAllFramesForLayout(
           layout_rendering_metadata.num_channels,
           submix_rendering_metadata.audio_elements_in_sub_mix,
-          submix_rendering_metadata.mix_gain, id_to_time_to_labeled_frame,
+          *submix_rendering_metadata.mix_gain, id_to_time_to_labeled_frame,
           layout_rendering_metadata.audio_element_rendering_metadata,
           parameter_blocks, submix_rendering_metadata.common_sample_rate,
           layout_rendering_metadata.start_timestamp, rendered_samples));

iamf/cli/rendering_mix_presentation_finalizer.h

@@ -84,7 +84,7 @@ class RenderingMixPresentationFinalizer {
     uint8_t loudness_calculator_bit_depth;
     std::vector<SubMixAudioElement> audio_elements_in_sub_mix;
     // Mix gain applied to the entire submix.
-    MixGainParamDefinition mix_gain;
+    std::unique_ptr<MixGainParamDefinition> mix_gain;
     // This vector will contain one LayoutRenderingMetadata per layout in the
     // submix.
     std::vector<LayoutRenderingMetadata> layout_rendering_metadata;