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engine: client: partially rework how AVI playback works in Xash. Add ffmpeg-based player.

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This intentionally will not build without --enable-ffmpeg for now.

We add new functions to the RenderAPI called AVI_Think and AVI_SetParm. Game
developer is supposed to call AVI_Think each frame and set video playback
parameters through AVI_SetParm function.

What's tested:
* Intro cinematics.
* Looping videos.
* Playing back an hour long video.
* API extension (PrimeXT's avi branch at https://github.com/a1batross/PrimeXT).

What's broken:
* There is no way to seek a video file, only rewind to the start.
This commit is contained in:
Alibek Omarov
2023-05-14 08:11:16 +03:00
parent 1884f0a3ce
commit 4275829bd5
9 changed files with 792 additions and 64 deletions
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19
common/render_api.h
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@@ -157,6 +157,21 @@ typedef struct decallist_s
modelstate_t studio_state; // studio decals only
} decallist_t;
enum movie_parms_e
{
AVI_PARM_LAST = 0, // marker for SetParm to end parse parsing arguments
AVI_RENDER_TEXNUM, // (int) sets texture to draw into, if 0 will draw to screen
AVI_RENDER_X, // (int) when set to screen, sets position where to draw
AVI_RENDER_Y,
AVI_RENDER_W, // (int) sets texture or screen width
AVI_RENDER_H, // set to -1 to draw full screen
AVI_REWIND, // no argument, rewind playback to the beginning
AVI_ENTNUM, // (int) entity number, -1 for no spatialization
AVI_VOLUME, // (int) volume from 0 to 255
AVI_ATTN, // (float) attenuation value
};
struct movie_state_s;
struct ref_viewpass_s;
typedef struct render_api_s
@@ -201,8 +216,8 @@ typedef struct render_api_s
void (*AVI_FreeVideo)( void *Avi );
int (*AVI_IsActive)( void *Avi );
void (*AVI_StreamSound)( void *Avi, int entnum, float fvol, float attn, float synctime );
void (*AVI_Reserved0)( void ); // for potential interface expansion without broken compatibility
void (*AVI_Reserved1)( void );
qboolean (*AVI_Think)( struct movie_state_s *Avi );
qboolean (*AVI_SetParm)( struct movie_state_s *Avi, enum movie_parms_e parm, ... );
// glState related calls (must use this instead of normal gl-calls to prevent de-synchornize local states between engine and the client)
void (*GL_Bind)( int tmu, unsigned int texnum );