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Simplify media i/o interfaces

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Completely revamped the entire media i/o data and handlers.  The
original idea was to have a system that would have connecting media
inputs and outputs, but at a certain point I realized that this was an
unnecessary complexity for what we wanted to do.  (Also, it reminded me
of directshow filters, and I HATE directshow with a passion, and
wouldn't wish it upon my greatest enemy)

Now, audio/video outputs are connected to directly, with better callback
handlers, and will eventually have the ability to automatically handle
conversions such as 4:4:4 to 4:2:0 when connecting to an input that uses
them.  Doing this will allow the video/audio i/o handlers to also
prevent duplicate conversion, as well as make it easier/simple to use.

My true goal for this is to make output and encoder plugins as simple to
create as possible.  I want to be able to be able to create an output
plugin with almost no real hassle of having to worry about image
conversions, media inputs/outputs, etc.  A plugin developer shouldn't
have to handle that sort of stuff when he/she doesn't really need to.

Plugins will be able to simply create a callback via obs_video() and/or
obs_audio(), and they will automatically receive the audio/video data in
the formats requested via a simple callback, without needing to do
almost anything else at all.
This commit is contained in:
jp9000
2014-01-14 01:58:47 -07:00
parent 2c0118b2d7
commit 62c2b1d74e
18 changed files with 317 additions and 422 deletions
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11
libobs/obs.h
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@@ -21,7 +21,8 @@
#include "util/bmem.h"
#include "graphics/graphics.h"
#include "graphics/vec2.h"
#include "media-io/media-io.h"
#include "media-io/audio-io.h"
#include "media-io/video-io.h"
#include "callback/signal.h"
#include "callback/proc.h"
@@ -173,13 +174,13 @@ EXPORT bool obs_reset_video(struct obs_video_info *ovi);
*
* NOTE: Cannot reset base audio if currently streaming/recording.
*/
EXPORT bool obs_reset_audio(struct audio_info *ai);
EXPORT bool obs_reset_audio(struct audio_output_info *ai);
/** Gets the current video settings, returns false if none */
EXPORT bool obs_get_video_info(struct obs_video_info *ovi);
/** Gets the current audio settings, returns false if none */
EXPORT bool obs_get_audio_info(struct audio_info *ai);
EXPORT bool obs_get_audio_info(struct audio_output_info *ai);
/**
* Loads a plugin module
@@ -225,8 +226,8 @@ EXPORT bool obs_enum_output_types(size_t idx, const char **id);
/** Gets the graphics context for this OBS context */
EXPORT graphics_t obs_graphics(void);
/** Get the media context for this OBS context (used for outputs) */
EXPORT media_t obs_media(void);
EXPORT audio_t obs_audio(void);
EXPORT video_t obs_video(void);
/**
* Adds a source to the user source list and increments the reference counter