RFC 45-6: Enable more connection info in Services API

[tytan652]

Description

This PR is about the RFC 45.

Depends on:

• RFC 45-1: Add protocol in Outputs API and check service protocol in the "UI" #5104
• RFC 45-2: Add protocol in Services API and enum functions in Outputs API #8087
• RFC 45-3: Use protocol for video codec selections #8088
• RFC 45-4: Use protocol to select output type for streaming #8089
• RFC 45-5: Allow selection of the audio codec/encoder #8090

Or if merge as is, contains:

• Closes RFC 45-1: Add protocol in Outputs API and check service protocol in the "UI" #5104
• Closes RFC 45-2: Add protocol in Services API and enum functions in Outputs API #8087
• Closes RFC 45-3: Use protocol for video codec selections #8088
• Closes RFC 45-4: Use protocol to select output type for streaming #8089
• Closes RFC 45-5: Allow selection of the audio codec/encoder #8090

Replace and deprecate url, key, username and password functions to replace with only one obs_service_get_connect_info().

This allow to ask the service for various connection information like:

• Server URL (Commonly used in various protocol)
• Stream key (Usually used with RTMP/FTL/HLS)
• Username (Can be use with RMTP/FTL/RIST)
• Password (Can be use with RMTP/FTL/RIST)
• Stream ID (Can be used for SRT)
• Encryption passphrase (Can be used for SRT/RIST)
• It also allow third-party protocol to use custom connection infos when third-party outputs+services will be possible.

Those info type are not bound to protocol.

Adds a function that allow the service to indicate if it has all the connection info that it needs to start streaming: obs_service_can_try_to_connect.

Motivation and Context

Part of the implementation of the RFC 45 recent changes.

How Has This Been Tested?

Only tested trying to stream SRT, might need more testing.

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.

[tytan652]

Rebased on #8090 to be able to work on top of all RFC 45 PRs.

[tytan652]

Remove prefix related changes as it was done in the RFC.

[jp9000]

LGTM™

[notr1ch]

A crash when using custom output was reported on Discord (https://discord.com/channels/348973006581923840/374636084883095554/1087384798894501939)

	if (!codecs || IsCustomService()) {
		const char *output;
		char **output_codecs;

		obs_enum_output_types_with_protocol(QT_TO_UTF8(protocol),
						    &output, return_first_id);

		output_codecs = strlist_split(
			obs_get_output_supported_video_codecs(output), ';',
			false);

		ret = service_supports_codec((const char **)output_codecs,
					     codec);

obs_enum_output_types_with_protocol fails to find an output, so output remains uninitialized, causing a crash in obs_get_output_supported_audio_codecs. I'm not sure what the intention is here since the code clearly wants to go this path with the IsCustomService condition. Changing it to if (!codecs && !IsCustomService()) might be more correct if we want to allow all codec compatibility for custom outputs.

The same issue exists in ServiceAndACodecCompatible too, perhaps these functions could be merged to avoid logic duplication.

[tytan652]

if we want to allow all codec compatibility for custom outputs.

We don't.

[tytan652]

The main problem is why no output were found.

Edit: And this is not the place to discuss about that.