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/**
* @file fakevideo.c Fake video source and video display
*
* Copyright (C) 2010 Creytiv.com
*/
#define _DEFAULT_SOURCE 1
#define _BSD_SOURCE 1
#include <unistd.h>
#include <pthread.h>
#include <re.h>
#include <rem.h>
#include <baresip.h>
/**
* @defgroup fakevideo fakevideo
*
* Fake video source and display module
*
* This module can be used to generate fake video input frames, and to
* send output video frames to a fake non-existant display.
*
* Example config:
\verbatim
video_source fakevideo,nil
video_display fakevideo,nil
\endverbatim
*/
struct vidsrc_st {
const struct vidsrc *vs; /* inheritance */
struct vidframe *frame;
#ifdef HAVE_PTHREAD
pthread_t thread;
bool run;
#else
struct tmr tmr;
#endif
uint64_t ts;
double fps;
vidsrc_frame_h *frameh;
void *arg;
};
struct vidisp_st {
const struct vidisp *vd; /* inheritance */
};
static struct vidsrc *vidsrc;
static struct vidisp *vidisp;
static void process_frame(struct vidsrc_st *st)
{
st->ts += (VIDEO_TIMEBASE / st->fps);
st->frameh(st->frame, st->ts, st->arg);
}
#ifdef HAVE_PTHREAD
static void *read_thread(void *arg)
{
struct vidsrc_st *st = arg;
st->ts = tmr_jiffies_usec();
while (st->run) {
if (tmr_jiffies_usec() < st->ts) {
sys_msleep(4);
continue;
}
process_frame(st);
}
return NULL;
}
#else
static void tmr_handler(void *arg)
{
struct vidsrc_st *st = arg;
const uint64_t now = tmr_jiffies_usec();
tmr_start(&st->tmr, 4, tmr_handler, st);
if (!st->ts)
st->ts = now;
if (now >= st->ts) {
process_frame(st);
}
}
#endif
static void src_destructor(void *arg)
{
struct vidsrc_st *st = arg;
#ifdef HAVE_PTHREAD
if (st->run) {
st->run = false;
pthread_join(st->thread, NULL);
}
#else
tmr_cancel(&st->tmr);
#endif
mem_deref(st->frame);
}
static void disp_destructor(void *arg)
{
struct vidisp_st *st = arg;
(void)st;
}
static int src_alloc(struct vidsrc_st **stp, const struct vidsrc *vs,
struct media_ctx **ctx, struct vidsrc_prm *prm,
const struct vidsz *size, const char *fmt,
const char *dev, vidsrc_frame_h *frameh,
vidsrc_error_h *errorh, void *arg)
{
struct vidsrc_st *st;
unsigned x;
int err;
(void)ctx;
(void)fmt;
(void)dev;
(void)errorh;
if (!stp || !prm || !size || !frameh)
return EINVAL;
st = mem_zalloc(sizeof(*st), src_destructor);
if (!st)
return ENOMEM;
st->vs = vs;
st->fps = prm->fps;
st->frameh = frameh;
st->arg = arg;
err = vidframe_alloc(&st->frame, VID_FMT_YUV420P, size);
if (err)
goto out;
/* Pattern of three vertical bars in RGB */
for (x=0; x<size->w; x++) {
uint8_t r=0, g=0, b=0;
if (x < size->w/3)
r = 255;
else if (x < size->w*2/3)
g = 255;
else
b = 255;
vidframe_draw_vline(st->frame, x, 0, size->h, r, g, b);
}
#ifdef HAVE_PTHREAD
st->run = true;
err = pthread_create(&st->thread, NULL, read_thread, st);
if (err) {
st->run = false;
goto out;
}
#else
tmr_start(&st->tmr, 1, tmr_handler, st);
#endif
out:
if (err)
mem_deref(st);
else
*stp = st;
return err;
}
static int disp_alloc(struct vidisp_st **stp, const struct vidisp *vd,
struct vidisp_prm *prm, const char *dev,
vidisp_resize_h *resizeh, void *arg)
{
struct vidisp_st *st;
(void)prm;
(void)dev;
(void)resizeh;
(void)arg;
if (!stp || !vd)
return EINVAL;
st = mem_zalloc(sizeof(*st), disp_destructor);
if (!st)
return ENOMEM;
st->vd = vd;
*stp = st;
return 0;
}
static int display(struct vidisp_st *st, const char *title,
const struct vidframe *frame)
{
(void)st;
(void)title;
(void)frame;
return 0;
}
static int module_init(void)
{
int err = 0;
err |= vidsrc_register(&vidsrc, baresip_vidsrcl(),
"fakevideo", src_alloc, NULL);
err |= vidisp_register(&vidisp, baresip_vidispl(),
"fakevideo", disp_alloc, NULL,
display, NULL);
return err;
}
static int module_close(void)
{
vidsrc = mem_deref(vidsrc);
vidisp = mem_deref(vidisp);
return 0;
}
EXPORT_SYM const struct mod_export DECL_EXPORTS(fakevideo) = {
"fakevideo",
"fakevideo",
module_init,
module_close
};
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