FFmpeg 7.0でのAPI変更に伴うコンパイルエラーを修正

Siv3D/src/Siv3D-Platform/Linux/Siv3D/AudioCodec/CAudioCodec.cpp

@@ -186,15 +186,18 @@ namespace s3d
 				}
 
 				// initialize swr context
-				int64_t out_channel_layout = AV_CH_LAYOUT_STEREO;
+				AVChannelLayout out_channel_layout;
+				av_channel_layout_subset(&out_channel_layout, AV_CH_LAYOUT_STEREO);
 				int out_nb_samples = m_codec_context->frame_size;
 				AVSampleFormat out_sample_fmt = AV_SAMPLE_FMT_FLT;
 				m_out_sample_rate = m_codec_context->sample_rate;
-				m_swr_context = swr_alloc_set_opts(m_swr_context,
-						out_channel_layout, out_sample_fmt, m_out_sample_rate,
-						av_get_default_channel_layout(m_codec_context->channels),
+				AVChannelLayout default_channel_layout;
+				av_channel_layout_default(&default_channel_layout, m_codec_context->ch_layout.nb_channels);
+				int allocation_result = swr_alloc_set_opts2(&m_swr_context,
+						&out_channel_layout, out_sample_fmt, m_out_sample_rate,
+						&default_channel_layout,
 						m_codec_context->sample_fmt, m_codec_context->sample_rate, 0, nullptr);
-				if (m_swr_context == nullptr)
+				if (allocation_result < 0)
 				{
 					LOG_TRACE(U"AACDecoder: swr_alloc() failed ({})"_fmt(m_path));
 					return false;
@@ -207,7 +210,7 @@ namespace s3d
 				}
 
 				// allocate output buffer
-				int out_nb_channels = av_get_channel_layout_nb_channels(out_channel_layout);
+				int out_nb_channels = out_channel_layout.nb_channels;
 				int buf_size = av_samples_get_buffer_size(nullptr,
 						out_nb_channels, out_nb_samples, out_sample_fmt, 0);
 				m_out_buf = (uint8_t*)av_malloc(buf_size);