# Changelog
## 1.1.2
* Add new callback `handle_child_terminated/3` along with new assertions. [#894](https://github.com/membraneframework/membrane_core/pull/894)
* Remove 'failed to insert a metric' stalker warning. [#849](https://github.com/membraneframework/membrane_core/pull/849)
## 1.1.1
* Fix 'table identifier does not refer to an existing ETS table' error when inserting metrics into the observability ETS. [#835](https://github.com/membraneframework/membrane_core/pull/835)
* Fix bug occuring in distributed atomic implementation. [#837](https://github.com/membraneframework/membrane_core/pull/837)
## 1.1.0
* Add new callbacks `handle_child_setup_completed/3` and `handle_child_playing/3` in Bins and Pipelines. [#801](https://github.com/membraneframework/membrane_core/pull/801)
* Deprecate `handle_spec_started/3` callback in Bins and Pipelines. [#708](https://github.com/membraneframework/membrane_core/pull/708)
* Handle buffers from input pads having `flow_control: :auto` only if demand on all output pads having `flow_control: :auto` is positive. [#693](https://github.com/membraneframework/membrane_core/pull/693)
* Set `:ratio` dependency version to `"~> 3.0 or ~> 4.0"`. [#780](https://github.com/membraneframework/membrane_core/pull/780)
* Deprecate `Membrane.Testing.Pipeline.message_child/3`. Introduce `Membrane.Testing.Pipeline.notify_child/3` instead. [#779](https://github.com/membraneframework/membrane_core/pull/779)
## 1.0.1
* Specify the order in which state fields will be printed in the error logs. [#614](https://github.com/membraneframework/membrane_core/pull/614)
* Fix clock selection [#626](https://github.com/membraneframework/membrane_core/pull/626)
* Log messages in the default handle_info implementation [#680](https://github.com/membraneframework/membrane_core/pull/680)
* Fix typespecs in Membrane.UtilitySupervisor [#681](https://github.com/membraneframework/membrane_core/pull/681)
* Improve callback return types and group actions types [#702](https://github.com/membraneframework/membrane_core/pull/702)
* Add `crash_reason` to `handle_crash_group_down/3` callback context in bins and pipelines. [#720](https://github.com/membraneframework/membrane_core/pull/720)
## 1.0.0
* Introduce `:remove_link` action in pipelines and bins.
* Add children groups - a mechanism that allows refering to multiple children with a single identifier.
* Rename `remove_child` action into `remove_children` and allow for removing a children group with a single action.
* Add an ability to spawn anonymous children.
* Replace `Membrane.Time.round_to_<unit_name>` with `Membrane.Time.as_<unit_name>/2` with second argument equal `:round`. Rename `Membrane.Time.round_to_timebase` to `Membrane.Time.divide_by_timebase/2`. [#494](https://github.com/membraneframework/membrane_core/pull/494)
* Remove `:playback` action. Introduce `:setup` action. [#496](https://github.com/membraneframework/membrane_core/pull/496)
* Add `Membrane.Testing.Pipeline.get_child_pid/2`. [#497](https://github.com/membraneframework/membrane_core/pull/497)
* Make callback contexts to be maps. [#504](https://github.com/membraneframework/membrane_core/pull/504)
* All Membrane Elements can be compatible till now on - pads working in `:pull` mode, handling different `demand_units`, can be now linked.
* Output pads working in `:pull` mode should have their `demand_unit` specified. If case it's not available, it's assumed that the pad handles demands in both `:bytes` and `:buffers` units.
* Rename callbacks `handle_process/4` and `handle_write/4` to `handle_buffer/4` in [#506](https://github.com/membraneframework/membrane_core/pull/506)
* The flow control of the pad is now set with a single `:flow_control` option instead of `:mode` and `:demand_mode` options.
* Remove _t suffix from types [#509](https://github.com/membraneframework/membrane_core/pull/509)
* Implement automatic demands in Membrane Sinks and Endpoints. [#512](https://github.com/membraneframework/membrane_core/pull/512)
* Add `handle_child_pad_removed/4` callback in Bins and Pipelines. [#513](https://github.com/membraneframework/membrane_core/pull/513)
* Introduce support for crash groups in Bins. [#521](https://github.com/membraneframework/membrane_core/pull/521)
* Remove `assert_pipeline_play/2` from `Membrane.Testing.Assertions`. [#528](https://github.com/membraneframework/membrane_core/pull/528)
* Make sure enumerable with all elements being `Membrane.Buffer.t()`, passed as `:output` parameter for `Membrane.Testing.Source` won't get rewrapped in `Membrane.Buffer.t()` struct.
* Implement `Membrane.Debug.Filter` and `Membrane.Debug.Sink`. [#552](https://github.com/membraneframework/membrane_core/pull/552)
* Add `:pause_auto_demand` and `:resume_auto_demand` actions. [#586](https://github.com/membraneframework/membrane_core/pull/586)
* Send `:end_of_stream`, even if it is not preceded by `:start_of_stream`. [#557](https://github.com/membraneframework/membrane_core/pull/577)
* Fix process leak in starting clocks. [#594](https://github.com/membraneframework/membrane_core/pull/594)
* Add child exit reason to the supervisor exit reason. [#595](https://github.com/membraneframework/membrane_core/pull/595)
* Remove default implementation of `start_/2`, `start_link/2` and `terminate/2` in modules using `Membrane.Pipeline`. [#598](https://github.com/membraneframework/membrane_core/pull/598)
* Remove callback _Membrane.Element.WithInputPads.handle_buffers_batch/4_. [#601](https://github.com/membraneframework/membrane_core/pull/601)
* Sort component state fields in the error logs in the order from the most to the least important. [#614](https://github.com/membraneframework/membrane_core/pull/614)
## 0.11.0
* Separate element_name and pad arguments in handle_element_{start, end}_of_stream signature [#219](https://github.com/membraneframework/membrane_core/issues/219)
* Refine communication between parent and its children [#270](https://github.com/membraneframework/membrane_core/issues/270)
* Add `handle_call/3` callback in the pipeline, as well as a `:reply` and `:reply_to` actions. Rename `handle_other/3` callback into `handle_info/3` [#334](https://github.com/membraneframework/membrane_core/issues/334)
* Add `Membrane.FilterAggregator` that allows to run multiple filters sequentially within one process. [#355](https://github.com/membraneframework/membrane_core/pull/355)
* Log info about element's playback state change as debug, not as debug_verbose. [#430](https://github.com/membraneframework/membrane_core/pull/430)
* Rename `Membrane.Time.to_<unit name>/1` into `Membrane.Time.round_to_<unit name>/1` to indicate that the result will be rounded. Make `Membrane.Time.<plural unit name>/1` accept `%Ratio{}` as an argument. Add `Membrane.Time.round_to_timebase` function.
* New `spec` action syntax - the structure of pipeline is now defined with the use of `Membrane.ChildrenSpec`
* Rename `:caps` to `:stream_format`.
* Use Elixir patterns as `:accepted_format` in pad definition.
* Delete `:ok` from tuples returned from callbacks.
* Remove `:type` from specs passed to `def_options/1` macro in bins and elements.
* Add `Membrane.Testing.MockResourceGuard`.
## 0.10.0
* Remove all deprecated stuff [#399](https://github.com/membraneframework/membrane_core/pull/399)
* Make `Membrane.Pipeline.{prepare, play, stop}` deprecated and add `:playback` action instead
* Make `Membrane.Pipeline.stop_and_terminate` deprecated and add `Membrane.Pipeline.terminate/2` instead
* Add `Membrane.RemoteControlled.Pipeline` - a basic implementation of a `Membrane.Pipeline` that can be spawned and controlled by an external process [#366](https://github.com/membraneframework/membrane_core/pull/366)
* Disallow sending buffers without sending caps first [#341](https://github.com/membraneframework/membrane_core/issues/341)
* Refine the `Membrane.Testing.Pipeline` API - deprecate the `Membrane.Testing.Pipeline.Options` usage, use keyword list as options in `Membrane.Testing.Pipeline.start/1` and `Membrane.Testing.Pipeline.start_link/1`
## 0.9.0
* Automatic demands [#313](https://github.com/membraneframework/membrane_core/pull/313)
* Stop forwarding notifications by default in bins [#358](https://github.com/membraneframework/membrane_core/pull/358)
* More fine-grained control over emitted metrics [#365](https://github.com/membraneframework/membrane_core/pull/365)
### PRs not influencing public API:
* Added log metadata when reporting init in telemetry [#376](https://github.com/membraneframework/membrane_core/pull/376)
* Fix generation of pad documentation inside an element [#377](https://github.com/membraneframework/membrane_core/pull/377)
* Leaving static pads unlinked and transiting to a playback state other than `:stopped` will result
in runtime error (previously only a warning was printed out). [#389](https://github.com/membraneframework/membrane_core/pull/389)
* It is possible now to assert on crash group down when using Testing.Pipeline. [#391](https://github.com/membraneframework/membrane_core/pull/391)
## 0.8.2
* Fixed PadAdded spec [#359](https://github.com/membraneframework/membrane_core/pull/359)
### PRs not influencing public API:
* Prevent internal testing notifications from reaching pipeline module [#350](https://github.com/membraneframework/membrane_core/pull/350)
* Fix unknown node error on distribution changes [#352](https://github.com/membraneframework/membrane_core/pull/352)
* Add new type of element, `Membrane.Endpoint` [#382](https://github.com/membraneframework/membrane_core/pull/382)
## 0.8.1
* allow telemetry in version 1.0 only [#347](https://github.com/membraneframework/membrane_core/pull/347)
### PRs not influencing public API:
* fix action enforcing CHANGELOG update with PR [#345](https://github.com/membraneframework/membrane_core/pull/345)
* Release membrane_core v0.8.1 [#348](https://github.com/membraneframework/membrane_core/pull/348)
## 0.8.0
### Release notes:
* PTS and DTS timestamps were added to `Membrane.Buffer` structure explicitly. Timestamps should no longer live in `Membrane.Buffer.metadata` field [#335](https://github.com/membraneframework/membrane_core/pull/335).
### PRs not influencing public API:
* add CHANGELOG update verification [#340](https://github.com/membraneframework/membrane_core/pull/340)
* action enforcing changelog fix [#342](https://github.com/membraneframework/membrane_core/pull/342)
* bump version to 0.8.0 [#344](https://github.com/membraneframework/membrane_core/pull/344)
