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	pipewire: improve memory cleanup
Add method to unload a spa interface. Various other memory cleanups
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					 8 changed files with 362 additions and 80 deletions
				
			
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			@ -442,14 +442,20 @@ static int negotiate_buffers(struct impl *impl)
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	spa_buffer_alloc_fill_info(&info, 0, NULL, blocks, datas, aligns);
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	info.skel_size = SPA_ROUND_UP_N(info.skel_size, 16);
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	if (impl->buffers)
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		free(impl->buffers);
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	impl->buffers = calloc(blocks, sizeof(struct spa_buffer *) + info.skel_size);
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	if (impl->buffers == NULL)
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		return -ENOMEM;
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        skel = SPA_MEMBER(impl->buffers, sizeof(struct spa_buffer *) * blocks, void);
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	data_size = info.meta_size + info.chunk_size + info.data_size;
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	if (impl->mem) {
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		pw_memblock_free(impl->mem);
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		impl->mem = NULL;
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	}
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	if ((res = pw_memblock_alloc(PW_MEMBLOCK_FLAG_WITH_FD |
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				     PW_MEMBLOCK_FLAG_MAP_READWRITE |
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				     PW_MEMBLOCK_FLAG_SEAL, blocks * data_size,
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			@ -800,18 +806,32 @@ static void client_node_initialized(void *data)
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	pw_node_set_active(impl->this.node, true);
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}
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static void cleanup(struct impl *impl)
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{
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	if (impl->use_converter) {
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		if (impl->adapter)
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			pw_unload_spa_interface(impl->adapter);
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	}
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	if (impl->buffers)
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		free(impl->buffers);
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	if (impl->mem) {
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		pw_memblock_free(impl->mem);
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		impl->mem = NULL;
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	}
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	free(impl);
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}
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static void client_node_destroy(void *data)
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{
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	struct impl *impl = data;
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	pw_log_debug("client-stream %p: destroy", &impl->this);
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	spa_hook_remove(&impl->client_node_listener);
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	spa_hook_remove(&impl->node_listener);
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	pw_node_destroy(impl->this.node);
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	free(impl);
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	cleanup(impl);
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}
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static void client_node_async_complete(void *data, uint32_t seq, int res)
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			@ -847,8 +867,7 @@ static void node_destroy(void *data)
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	spa_hook_remove(&impl->client_node_listener);
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	pw_client_node_destroy(impl->client_node);
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	free(impl);
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	cleanup(impl);
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}
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static const struct pw_node_events node_events = {
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