linux-pipewire: Replace dynamic arrays with allocations

Replace dynamic arrays added by 27630a8c0e075b9a27e7ee5558356333d7adb4a6
by allocations

plugins/linux-pipewire/pipewire.c

@@ -811,22 +811,13 @@ static void process_video_sync(obs_pipewire_stream *obs_pw_stream)
 
 	if (buffer->datas[0].type == SPA_DATA_DmaBuf) {
 		uint32_t planes = buffer->n_datas;
-		DARRAY(uint32_t) offsets;
-		DARRAY(uint32_t) strides;
-		DARRAY(uint64_t) modifiers;
-		DARRAY(int) fds;
+		uint32_t *offsets = alloca(sizeof(uint32_t) * planes);
+		uint32_t *strides = alloca(sizeof(uint32_t) * planes);
+		uint64_t *modifiers = alloca(sizeof(uint64_t) * planes);
+		int *fds = alloca(sizeof(int) * planes);
 		bool use_modifiers;
 		bool corrupt = false;
 
-		da_init(offsets);
-		da_reserve(offsets, planes);
-		da_init(strides);
-		da_reserve(strides, planes);
-		da_init(modifiers);
-		da_reserve(modifiers, planes);
-		da_init(fds);
-		da_reserve(fds, planes);
-
 #ifdef DEBUG_PIPEWIRE
 		blog(LOG_DEBUG,
 		     "[pipewire] DMA-BUF info: fd:%ld, stride:%d, offset:%u, size:%dx%d",
@@ -847,13 +838,11 @@ static void process_video_sync(obs_pipewire_stream *obs_pw_stream)
 		}
 
 		for (uint32_t plane = 0; plane < planes; plane++) {
-			da_push_back(fds, &buffer->datas[plane].fd);
-			da_push_back(offsets,
-				     &buffer->datas[plane].chunk->offset);
-			da_push_back(strides,
-				     &buffer->datas[plane].chunk->stride);
-			da_push_back(modifiers,
-				     &obs_pw_stream->format.info.raw.modifier);
+			fds[plane] = buffer->datas[plane].fd;
+			offsets[plane] = buffer->datas[plane].chunk->offset;
+			strides[plane] = buffer->datas[plane].chunk->stride;
+			modifiers[plane] =
+				obs_pw_stream->format.info.raw.modifier;
 			corrupt |= (buffer->datas[plane].chunk->flags &
 				    SPA_CHUNK_FLAG_CORRUPTED) > 0;
 		}
@@ -861,12 +850,6 @@ static void process_video_sync(obs_pipewire_stream *obs_pw_stream)
 		if (corrupt) {
 			blog(LOG_DEBUG,
 			     "[pipewire] buffer contains corrupted data");
-
-			da_free(offsets);
-			da_free(strides);
-			da_free(modifiers);
-			da_free(fds);
-
 			goto read_metadata;
 		}
 
@@ -877,14 +860,8 @@ static void process_video_sync(obs_pipewire_stream *obs_pw_stream)
 		obs_pw_stream->texture = gs_texture_create_from_dmabuf(
 			obs_pw_stream->format.info.raw.size.width,
 			obs_pw_stream->format.info.raw.size.height,
-			format_data.drm_format, GS_BGRX, planes, fds.array,
-			strides.array, offsets.array,
-			use_modifiers ? modifiers.array : NULL);
-
-		da_free(offsets);
-		da_free(strides);
-		da_free(modifiers);
-		da_free(fds);
+			format_data.drm_format, GS_BGRX, planes, fds, strides,
+			offsets, use_modifiers ? modifiers : NULL);
 
 		if (obs_pw_stream->texture == NULL) {
 			remove_modifier_from_format(