/
vid_conf.c
1247 lines (1044 loc) · 34.4 KB
/
vid_conf.c
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/* $Id$ */
/*
* Copyright (C) 2019 Teluu Inc. (http://www.teluu.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <pjmedia/vid_conf.h>
#include <pjmedia/clock.h>
#include <pjmedia/converter.h>
#include <pjmedia/errno.h>
#include <pj/array.h>
#include <pj/log.h>
#include <pj/os.h>
#if defined(PJMEDIA_HAS_VIDEO) && (PJMEDIA_HAS_VIDEO != 0)
#define CONF_NAME "vidconf"
#define CONF_SIGN PJMEDIA_SIG_VID_CONF
/* If set, conf will stop clock when there is no ports connection. However,
* this may cause stuck if port remove/disconnect is called from the clock
* callback. So better disable this for now.
*/
#define AUTO_STOP_CLOCK 0
/* Maximum number of consecutive errors that will only be printed once. */
#define MAX_ERR_COUNT 150
/* Clockrate for video timestamp unit */
#define TS_CLOCK_RATE 90000
#define THIS_FILE "vid_conf.c"
#define TRACE_(x) PJ_LOG(5,x)
/*
* Conference bridge.
*/
struct pjmedia_vid_conf
{
pjmedia_vid_conf_setting opt; /**< Settings. */
unsigned port_cnt; /**< Current number of ports. */
unsigned connect_cnt; /**< Total number of connections */
pj_mutex_t *mutex; /**< Conference mutex. */
struct vconf_port **ports; /**< Array of ports. */
pjmedia_clock *clock; /**< Clock. */
};
/*
* Rendering state: converter, layout settings, etc.
*/
typedef struct render_state
{
pjmedia_format_id src_fmt_id; /**< Source format ID. */
pjmedia_rect_size src_frame_size; /**< Source frame size. */
pjmedia_rect src_rect; /**< Source region to be rendered. */
pjmedia_format_id dst_fmt_id; /**< Destination format ID. */
pjmedia_rect_size dst_frame_size; /**< Destination frame size. */
pjmedia_rect dst_rect; /**< Destination region. */
pjmedia_converter *converter; /**< Converter. */
} render_state;
/*
* Conference bridge port.
*/
typedef struct vconf_port
{
pj_pool_t *pool; /**< Pool. */
unsigned idx; /**< Port index. */
pj_str_t name; /**< Port name. */
pjmedia_port *port; /**< Video port. */
pjmedia_format format; /**< Copy of port format info. */
pj_uint32_t ts_interval; /**< Port put/get interval. */
pj_timestamp ts_next; /**< Time for next put/get_frame(). */
void *get_buf; /**< Buffer for get_frame(). */
pj_size_t get_buf_size; /**< Buffer size for get_frame(). */
void *put_buf; /**< Buffer for put_frame(). */
pj_size_t put_buf_size; /**< Buffer size for put_frame(). */
unsigned listener_cnt; /**< Number of listeners. */
unsigned *listener_slots;/**< Array of listeners (for info). */
unsigned transmitter_cnt;/**<Number of transmitters. */
unsigned *transmitter_slots;/**< Array of transmitters. */
pj_pool_t **render_pool; /**< Array of pool for render state */
render_state **render_states; /**< Array of render_state (one for
each transmitter). */
pj_status_t last_err; /**< Last error status. */
unsigned last_err_cnt; /**< Last error count. */
} vconf_port;
/* Prototypes */
static void on_clock_tick(const pj_timestamp *ts, void *user_data);
static pj_status_t render_src_frame(vconf_port *src, vconf_port *sink,
unsigned transmitter_idx);
static void update_render_state(pjmedia_vid_conf *vid_conf, vconf_port *cp);
static void cleanup_render_state(vconf_port *cp,
unsigned transmitter_idx);
/*
* Initialize video conference settings with default values.
*/
PJ_DEF(void) pjmedia_vid_conf_setting_default(pjmedia_vid_conf_setting *opt)
{
pj_bzero(opt, sizeof(*opt));
opt->max_slot_cnt = 32;
opt->frame_rate = 60;
}
/*
* Create a video conference bridge.
*/
PJ_DEF(pj_status_t) pjmedia_vid_conf_create(
pj_pool_t *pool,
const pjmedia_vid_conf_setting *opt,
pjmedia_vid_conf **p_vid_conf)
{
pjmedia_vid_conf *vid_conf;
pjmedia_clock_param clock_param;
pj_status_t status;
PJ_ASSERT_RETURN(pool && p_vid_conf, PJ_EINVAL);
/* Allocate conf structure */
vid_conf = PJ_POOL_ZALLOC_T(pool, pjmedia_vid_conf);
PJ_ASSERT_RETURN(vid_conf, PJ_ENOMEM);
/* Init settings */
if (opt) {
vid_conf->opt = *opt;
} else {
pjmedia_vid_conf_setting_default(&vid_conf->opt);
}
/* Allocate ports */
vid_conf->ports = (vconf_port**)
pj_pool_zalloc(pool, vid_conf->opt.max_slot_cnt *
sizeof(vconf_port*));
PJ_ASSERT_RETURN(vid_conf->ports, PJ_ENOMEM);
/* Create mutex */
status = pj_mutex_create_recursive(pool, CONF_NAME, &vid_conf->mutex);
if (status != PJ_SUCCESS) {
pjmedia_vid_conf_destroy(vid_conf);
return status;
}
/* Create clock */
pj_bzero(&clock_param, sizeof(clock_param));
clock_param.clock_rate = TS_CLOCK_RATE;
clock_param.usec_interval = 1000000 / vid_conf->opt.frame_rate;
status = pjmedia_clock_create2(pool, &clock_param, 0, &on_clock_tick,
vid_conf, &vid_conf->clock);
if (status != PJ_SUCCESS) {
pjmedia_vid_conf_destroy(vid_conf);
return status;
}
/* Done */
*p_vid_conf = vid_conf;
PJ_LOG(5,(THIS_FILE, "Created video conference bridge with %d ports",
vid_conf->opt.max_slot_cnt));
return PJ_SUCCESS;
}
/*
* Destroy video conference bridge.
*/
PJ_DEF(pj_status_t) pjmedia_vid_conf_destroy(pjmedia_vid_conf *vid_conf)
{
unsigned i;
PJ_ASSERT_RETURN(vid_conf, PJ_EINVAL);
/* Destroy clock */
if (vid_conf->clock) {
pjmedia_clock_destroy(vid_conf->clock);
vid_conf->clock = NULL;
}
/* Remove any registered ports (at least to cleanup their pool) */
for (i=0; i < vid_conf->opt.max_slot_cnt; ++i) {
pjmedia_vid_conf_remove_port(vid_conf, i);
}
/* Destroy mutex */
if (vid_conf->mutex) {
pj_mutex_destroy(vid_conf->mutex);
vid_conf->mutex = NULL;
}
PJ_LOG(5,(THIS_FILE, "Video conference bridge destroyed"));
return PJ_SUCCESS;
}
/*
* Add a media port to the video conference bridge.
*/
PJ_DEF(pj_status_t) pjmedia_vid_conf_add_port( pjmedia_vid_conf *vid_conf,
pj_pool_t *parent_pool,
pjmedia_port *port,
const pj_str_t *name,
void *opt,
unsigned *p_slot)
{
pj_pool_t *pool;
vconf_port *cport;
unsigned index;
PJ_ASSERT_RETURN(vid_conf && parent_pool && port, PJ_EINVAL);
PJ_ASSERT_RETURN(port->info.fmt.type==PJMEDIA_TYPE_VIDEO &&
port->info.fmt.detail_type==PJMEDIA_FORMAT_DETAIL_VIDEO,
PJ_EINVAL);
PJ_UNUSED_ARG(opt);
/* If name is not specified, use the port's name */
if (!name)
name = &port->info.name;
pj_mutex_lock(vid_conf->mutex);
if (vid_conf->port_cnt >= vid_conf->opt.max_slot_cnt) {
pj_assert(!"Too many ports");
pj_mutex_unlock(vid_conf->mutex);
return PJ_ETOOMANY;
}
/* Find empty port in the conference bridge. */
for (index=0; index < vid_conf->opt.max_slot_cnt; ++index) {
if (vid_conf->ports[index] == NULL)
break;
}
pj_assert(index != vid_conf->opt.max_slot_cnt);
/* Create pool */
pool = pj_pool_create(parent_pool->factory, name->ptr, 500, 500, NULL);
PJ_ASSERT_RETURN(pool, PJ_ENOMEM);
/* Create port. */
cport = PJ_POOL_ZALLOC_T(pool, vconf_port);
PJ_ASSERT_RETURN(cport, PJ_ENOMEM);
/* Set pool, port, index, and name */
cport->pool = pool;
cport->port = port;
cport->format = port->info.fmt;
cport->idx = index;
pj_strdup_with_null(pool, &cport->name, name);
/* Init put/get_frame() intervals */
{
pjmedia_ratio *fps = &port->info.fmt.det.vid.fps;
pj_uint32_t vconf_interval = (pj_uint32_t)
(TS_CLOCK_RATE * 1.0 /
vid_conf->opt.frame_rate);
cport->ts_interval = (pj_uint32_t)(TS_CLOCK_RATE * 1.0 /
fps->num * fps->denum);
/* Normalize the interval */
if (cport->ts_interval < vconf_interval) {
cport->ts_interval = vconf_interval;
PJ_LOG(3,(THIS_FILE, "Warning: frame rate of port %s is higher "
"than video conference bridge (%d > %d)",
name->ptr, (int)(fps->num/fps->denum),
vid_conf->opt.frame_rate));
}
}
/* Allocate buffer for put/get_frame() */
{
const pjmedia_video_format_info *vfi;
pjmedia_video_apply_fmt_param vafp;
pj_status_t status;
vfi = pjmedia_get_video_format_info(NULL, port->info.fmt.id);
if (!vfi) {
PJ_LOG(4,(THIS_FILE, "pjmedia_vid_conf_add_port(): "
"unrecognized format %04X",
port->info.fmt.id));
pj_mutex_unlock(vid_conf->mutex);
return PJMEDIA_EBADFMT;
}
pj_bzero(&vafp, sizeof(vafp));
vafp.size = port->info.fmt.det.vid.size;
status = (*vfi->apply_fmt)(vfi, &vafp);
if (status != PJ_SUCCESS) {
PJ_LOG(4,(THIS_FILE, "pjmedia_vid_conf_add_port(): "
"Failed to apply format %04X",
port->info.fmt.id));
pj_mutex_unlock(vid_conf->mutex);
return status;
}
if (port->put_frame) {
cport->put_buf_size = vafp.framebytes;
cport->put_buf = pj_pool_zalloc(cport->pool, cport->put_buf_size);
}
if (port->get_frame) {
cport->get_buf_size = vafp.framebytes;
cport->get_buf = pj_pool_zalloc(cport->pool, cport->get_buf_size);
}
}
/* Create listener array */
cport->listener_slots = (unsigned*)
pj_pool_zalloc(pool,
vid_conf->opt.max_slot_cnt *
sizeof(unsigned));
if (!cport->listener_slots) {
pj_mutex_unlock(vid_conf->mutex);
return PJ_ENOMEM;
}
/* Create transmitter array */
cport->transmitter_slots = (unsigned*)
pj_pool_zalloc(pool,
vid_conf->opt.max_slot_cnt *
sizeof(unsigned));
if (!cport->transmitter_slots) {
pj_mutex_unlock(vid_conf->mutex);
return PJ_ENOMEM;
}
/* Create pointer-to-render_state array */
cport->render_states = (render_state**)
pj_pool_zalloc(pool,
vid_conf->opt.max_slot_cnt *
sizeof(render_state*));
if (!cport->render_states) {
pj_mutex_unlock(vid_conf->mutex);
return PJ_ENOMEM;
}
/* Create pointer-to-render-pool array */
cport->render_pool = (pj_pool_t**)
pj_pool_zalloc(pool,
vid_conf->opt.max_slot_cnt *
sizeof(pj_pool_t*));
if (!cport->render_pool) {
pj_mutex_unlock(vid_conf->mutex);
return PJ_ENOMEM;
}
/* Register the conf port. */
vid_conf->ports[index] = cport;
vid_conf->port_cnt++;
PJ_LOG(4,(THIS_FILE,"Added port %d (%.*s)",
index, (int)cport->name.slen, cport->name.ptr));
pj_mutex_unlock(vid_conf->mutex);
/* Done. */
if (p_slot) {
*p_slot = index;
}
return PJ_SUCCESS;
}
/*
* Remove a media port from the video conference bridge.
*/
PJ_DEF(pj_status_t) pjmedia_vid_conf_remove_port( pjmedia_vid_conf *vid_conf,
unsigned slot)
{
vconf_port *cport;
PJ_ASSERT_RETURN(vid_conf && slot<vid_conf->opt.max_slot_cnt, PJ_EINVAL);
pj_mutex_lock(vid_conf->mutex);
/* Port must be valid. */
cport = vid_conf->ports[slot];
if (cport == NULL) {
pj_mutex_unlock(vid_conf->mutex);
return PJ_EINVAL;
}
/* Disconnect slot -> listeners */
while (cport->listener_cnt) {
pjmedia_vid_conf_disconnect_port(vid_conf, slot,
cport->listener_slots[0]);
}
/* Disconnect transmitters -> slot */
while (cport->transmitter_cnt) {
pjmedia_vid_conf_disconnect_port(vid_conf,
cport->transmitter_slots[0], slot);
}
/* Remove the port. */
vid_conf->ports[slot] = NULL;
--vid_conf->port_cnt;
PJ_LOG(4,(THIS_FILE,"Removed port %d (%.*s)",
slot, (int)cport->name.slen, cport->name.ptr));
/* Release pool */
pj_pool_safe_release(&cport->pool);
if (AUTO_STOP_CLOCK && vid_conf->connect_cnt == 0) {
pj_status_t status;
/* Warning: will stuck if this is called from the clock thread */
status = pjmedia_clock_stop(vid_conf->clock);
if (status != PJ_SUCCESS) {
PJ_PERROR(4, (THIS_FILE, status, "Failed to stop clock"));
pj_mutex_unlock(vid_conf->mutex);
return status;
}
}
pj_mutex_unlock(vid_conf->mutex);
return PJ_SUCCESS;
}
/*
* Get number of ports currently registered in the video conference bridge.
*/
PJ_DEF(unsigned) pjmedia_vid_conf_get_port_count(pjmedia_vid_conf *vid_conf)
{
return vid_conf->port_cnt;
}
/*
* Enumerate occupied slots in the video conference bridge.
*/
PJ_DEF(pj_status_t) pjmedia_vid_conf_enum_ports( pjmedia_vid_conf *vid_conf,
unsigned slots[],
unsigned *count)
{
unsigned i, tmp_count=0;
PJ_ASSERT_RETURN(vid_conf && slots && count, PJ_EINVAL);
/* Lock mutex */
pj_mutex_lock(vid_conf->mutex);
for (i=0; i<vid_conf->opt.max_slot_cnt && tmp_count<*count; ++i) {
if (!vid_conf->ports[i])
continue;
slots[tmp_count++] = i;
}
/* Unlock mutex */
pj_mutex_unlock(vid_conf->mutex);
*count = tmp_count;
return PJ_SUCCESS;
}
/*
* Get port info.
*/
PJ_DEF(pj_status_t) pjmedia_vid_conf_get_port_info(
pjmedia_vid_conf *vid_conf,
unsigned slot,
pjmedia_vid_conf_port_info *info)
{
vconf_port *cp;
/* Check arguments */
PJ_ASSERT_RETURN(vid_conf && slot<vid_conf->opt.max_slot_cnt, PJ_EINVAL);
/* Lock mutex */
pj_mutex_lock(vid_conf->mutex);
/* Port must be valid. */
cp = vid_conf->ports[slot];
if (cp == NULL) {
pj_mutex_unlock(vid_conf->mutex);
return PJ_EINVAL;
}
info->slot = slot;
info->name = cp->name;
pjmedia_format_copy(&info->format, &cp->port->info.fmt);
info->listener_cnt = cp->listener_cnt;
info->listener_slots = cp->listener_slots;
info->transmitter_cnt = cp->transmitter_cnt;
info->transmitter_slots = cp->transmitter_slots;
/* Unlock mutex */
pj_mutex_unlock(vid_conf->mutex);
return PJ_SUCCESS;
}
/*
* Enable unidirectional video flow from the specified source slot to
* the specified sink slot.
*/
PJ_DEF(pj_status_t) pjmedia_vid_conf_connect_port(
pjmedia_vid_conf *vid_conf,
unsigned src_slot,
unsigned sink_slot,
void *opt)
{
vconf_port *src_port, *dst_port;
unsigned i;
/* Check arguments */
PJ_ASSERT_RETURN(vid_conf &&
src_slot<vid_conf->opt.max_slot_cnt &&
sink_slot<vid_conf->opt.max_slot_cnt, PJ_EINVAL);
PJ_UNUSED_ARG(opt);
pj_mutex_lock(vid_conf->mutex);
/* Ports must be valid. */
src_port = vid_conf->ports[src_slot];
dst_port = vid_conf->ports[sink_slot];
if (!src_port || !src_port->port->get_frame ||
!dst_port || !dst_port->port->put_frame)
{
PJ_LOG(4,(THIS_FILE,"Failed connecting video ports, make sure that "
"source has get_frame() & sink has put_frame()"));
pj_mutex_unlock(vid_conf->mutex);
return PJ_EINVAL;
}
/* Check if connection has been made */
for (i=0; i<src_port->listener_cnt; ++i) {
if (src_port->listener_slots[i] == sink_slot)
break;
}
if (i == src_port->listener_cnt) {
src_port->listener_slots[src_port->listener_cnt] = sink_slot;
dst_port->transmitter_slots[dst_port->transmitter_cnt] = src_slot;
++src_port->listener_cnt;
++dst_port->transmitter_cnt;
if (src_port->listener_cnt == 1) {
/* If this is the first listener, initialize source's buffer
* with black color.
*/
const pjmedia_video_format_info *vfi;
pjmedia_video_apply_fmt_param vafp;
vfi = pjmedia_get_video_format_info(NULL,
src_port->port->info.fmt.id);
pj_bzero(&vafp, sizeof(vafp));
vafp.size = src_port->port->info.fmt.det.vid.size;
(*vfi->apply_fmt)(vfi, &vafp);
if (vfi->color_model == PJMEDIA_COLOR_MODEL_RGB) {
pj_memset(src_port->get_buf, 0, vafp.framebytes);
} else if (src_port->port->info.fmt.id == PJMEDIA_FORMAT_I420 ||
src_port->port->info.fmt.id == PJMEDIA_FORMAT_YV12)
{
pj_memset(src_port->get_buf, 16, vafp.plane_bytes[0]);
pj_memset((pj_uint8_t*)src_port->get_buf + vafp.plane_bytes[0],
0x80, vafp.plane_bytes[1] * 2);
}
}
update_render_state(vid_conf, dst_port);
++vid_conf->connect_cnt;
if (vid_conf->connect_cnt == 1) {
pj_status_t status;
status = pjmedia_clock_start(vid_conf->clock);
if (status != PJ_SUCCESS) {
PJ_PERROR(4, (THIS_FILE, status, "Failed to start clock"));
pj_mutex_unlock(vid_conf->mutex);
return status;
}
}
PJ_LOG(4,(THIS_FILE,"Port %d (%.*s) transmitting to port %d (%.*s)",
src_slot,
(int)src_port->name.slen,
src_port->name.ptr,
sink_slot,
(int)dst_port->name.slen,
dst_port->name.ptr));
}
pj_mutex_unlock(vid_conf->mutex);
return PJ_SUCCESS;
}
/*
* Disconnect unidirectional video flow from the specified source to
* the specified sink slot.
*/
PJ_DEF(pj_status_t) pjmedia_vid_conf_disconnect_port(
pjmedia_vid_conf *vid_conf,
unsigned src_slot,
unsigned sink_slot)
{
vconf_port *src_port, *dst_port;
unsigned i, j;
/* Check arguments */
PJ_ASSERT_RETURN(vid_conf &&
src_slot<vid_conf->opt.max_slot_cnt &&
sink_slot<vid_conf->opt.max_slot_cnt, PJ_EINVAL);
pj_mutex_lock(vid_conf->mutex);
/* Ports must be valid. */
src_port = vid_conf->ports[src_slot];
dst_port = vid_conf->ports[sink_slot];
if (!src_port || !dst_port) {
pj_mutex_unlock(vid_conf->mutex);
return PJ_EINVAL;
}
/* Check if connection has been made */
for (i=0; i<src_port->listener_cnt; ++i) {
if (src_port->listener_slots[i] == sink_slot)
break;
}
for (j=0; j<dst_port->transmitter_cnt; ++j) {
if (dst_port->transmitter_slots[j] == src_slot)
break;
}
if (i != src_port->listener_cnt && j != dst_port->transmitter_cnt) {
unsigned k;
pj_assert(src_port->listener_cnt > 0 &&
src_port->listener_cnt < vid_conf->opt.max_slot_cnt);
pj_assert(dst_port->transmitter_cnt > 0 &&
dst_port->transmitter_cnt < vid_conf->opt.max_slot_cnt);
/* Cleanup all render states of the sink */
for (k=0; k<dst_port->transmitter_cnt; ++k)
cleanup_render_state(dst_port, k);
/* Update listeners array of the source and transmitters array of
* the sink.
*/
pj_array_erase(src_port->listener_slots, sizeof(unsigned),
src_port->listener_cnt, i);
pj_array_erase(dst_port->transmitter_slots, sizeof(unsigned),
dst_port->transmitter_cnt, j);
--src_port->listener_cnt;
--dst_port->transmitter_cnt;
/* Update render states of the sink */
update_render_state(vid_conf, dst_port);
--vid_conf->connect_cnt;
if (AUTO_STOP_CLOCK && vid_conf->connect_cnt == 0) {
pj_status_t status;
/* Warning: will stuck if this is called from the clock thread */
status = pjmedia_clock_stop(vid_conf->clock);
if (status != PJ_SUCCESS) {
PJ_PERROR(4, (THIS_FILE, status, "Failed to stop clock"));
pj_mutex_unlock(vid_conf->mutex);
return status;
}
}
PJ_LOG(4,(THIS_FILE,
"Port %d (%.*s) stop transmitting to port %d (%.*s)",
src_slot,
(int)src_port->name.slen,
src_port->name.ptr,
sink_slot,
(int)dst_port->name.slen,
dst_port->name.ptr));
}
pj_mutex_unlock(vid_conf->mutex);
return PJ_SUCCESS;
}
/*
* Internal functions.
*/
static void on_clock_tick(const pj_timestamp *now, void *user_data)
{
pjmedia_vid_conf *vid_conf = (pjmedia_vid_conf*)user_data;
unsigned ci, i;
pj_int32_t ts_diff;
pjmedia_frame frame;
pj_status_t status;
pj_mutex_lock(vid_conf->mutex);
/* Iterate all (sink) ports */
for (i=0, ci=0; i<vid_conf->opt.max_slot_cnt &&
ci<vid_conf->port_cnt; ++i)
{
unsigned j;
pj_bool_t got_frame = PJ_FALSE;
pj_bool_t ts_incremented = PJ_FALSE;
vconf_port *sink = vid_conf->ports[i];
/* Skip empty port */
if (!sink)
continue;
/* Increment occupied port counter */
++ci;
/* Skip non-sink port */
if (!sink->port->put_frame)
continue;
if (sink->ts_next.u64 == 0)
sink->ts_next = *now;
/* Skip if too early for put_frame(), note:
* early = (now < ts_next)
* But careful for timestamp wrapped around.
*/
ts_diff = pj_timestamp_diff32(&sink->ts_next, now);
if (ts_diff < 0 || ts_diff > TS_CLOCK_RATE)
continue;
/* Clean up sink put buffer (should we draw black instead?) */
//pj_bzero(sink->put_buf, sink->put_buf_size);
/* Iterate transmitters of this sink port */
for (j=0; j < sink->transmitter_cnt; ++j) {
vconf_port *src = vid_conf->ports[sink->transmitter_slots[j]];
pj_int32_t src_ts_diff;
if (src->ts_next.u64 == 0)
src->ts_next = *now;
/* Is it time for src->get_frame()? yes, if (now >= ts_next) */
src_ts_diff = pj_timestamp_diff32(&src->ts_next, now);
if (src_ts_diff >= 0) {
/* Call src->get_frame().
* Possible optimization: if this src only has one listener,
* perhaps we can skip this src buffer and directly render it
* to sink buffer (but still need buffer if conversion any).
*/
pj_bzero(&frame, sizeof(frame));
frame.type = PJMEDIA_FRAME_TYPE_VIDEO;
frame.timestamp = *now;
frame.buf = src->get_buf;
frame.size = src->get_buf_size;
status = pjmedia_port_get_frame(src->port, &frame);
if (status != PJ_SUCCESS) {
PJ_PERROR(5, (THIS_FILE, status,
"Failed to get frame from port %d [%s]!",
src->idx, src->port->info.name.ptr));
}
/* Update next src put/get */
pj_add_timestamp32(&src->ts_next, src->ts_interval);
ts_incremented = src==sink;
}
/* Render src get buffer to sink put buffer (based on sink layout
* settings, if any)
*/
status = render_src_frame(src, sink, j);
if (status != PJ_SUCCESS) {
PJ_PERROR(5, (THIS_FILE, status,
"Failed to render frame from port %d [%s] to "
"%d [%s]",
src->idx, src->port->info.name.ptr,
sink->idx, sink->port->info.name.ptr));
}
got_frame = PJ_TRUE;
}
/* Call sink->put_frame()
* Note that if transmitter_cnt==0, we should still call put_frame()
* with zero frame size, as sink may need to send keep-alive packets
* and get timestamp update.
*/
pj_bzero(&frame, sizeof(frame));
frame.type = PJMEDIA_FRAME_TYPE_VIDEO;
frame.timestamp = *now;
if (got_frame) {
frame.buf = sink->put_buf;
frame.size = sink->put_buf_size;
}
status = pjmedia_port_put_frame(sink->port, &frame);
if (got_frame && status != PJ_SUCCESS) {
sink->last_err_cnt++;
if (sink->last_err != status ||
sink->last_err_cnt % MAX_ERR_COUNT == 0)
{
if (sink->last_err != status)
sink->last_err_cnt = 1;
sink->last_err = status;
PJ_PERROR(5, (THIS_FILE, status,
"Failed (%d time(s)) to put frame to port %d"
" [%s]!", sink->last_err_cnt,
sink->idx, sink->port->info.name.ptr));
}
} else {
sink->last_err = status;
sink->last_err_cnt = 0;
}
/* Update next put/get, careful that it may have been updated
* if this port transmits to itself!
*/
if (!ts_incremented) {
pj_add_timestamp32(&sink->ts_next, sink->ts_interval);
}
}
pj_mutex_unlock(vid_conf->mutex);
}
static pj_bool_t is_landscape(const pjmedia_rect_size *size) {
return (size->w >= size->h);
}
/* Adjust a frame size to match ratio specified in the ref_size.
* Either dimension of the frame may be cropped (but will never be
* expanded).
*/
static void match_ratio_crop(pjmedia_rect_size *size,
const pjmedia_rect_size *ref_size)
{
pjmedia_rect_size res;
/* Try match width first */
res.w = size->w;
res.h = ref_size->h * size->w / ref_size->w;
/* If original height turns out to be shorther, match height */
if (size->h < res.h) {
res.w = ref_size->w * size->h / ref_size->h;
res.h = size->h;
}
*size = res;
return;
}
/* Cleanup rendering states, called when a transmitter is disconnected
* from a listener, or before reinit-ing rendering state of a listener
* when new connection has just been made.
*/
static void cleanup_render_state(vconf_port *cp,
unsigned transmitter_idx)
{
render_state *rs = cp->render_states[transmitter_idx];
if (rs && rs->converter)
{
pjmedia_converter_destroy(rs->converter);
rs->converter = NULL;
}
cp->render_states[transmitter_idx] = NULL;
if (cp->render_pool[transmitter_idx]) {
pj_pool_safe_release(&cp->render_pool[transmitter_idx]);
TRACE_((THIS_FILE, "Cleaned up render state for connection %d->%d",
cp->transmitter_slots[transmitter_idx], cp->idx));
}
}
/* This function will do:
* - Recalculate layout setting, i.e: get video pos and size
* for each transmitter
* - Check if converter is needed and setup it.
* - Those above things will be stored in render_state and
* will be used by render_src_frame()
*/
static void update_render_state(pjmedia_vid_conf *vid_conf, vconf_port *cp)
{
pjmedia_format_id fmt_id, tr_fmt_id[4];
pjmedia_rect_size size, tr_size[4];
unsigned i;
pj_status_t status;
/* Nothing to render, just return */
if (cp->transmitter_cnt == 0)
return;
TRACE_((THIS_FILE, "Updating render state for port id %d (%d sources)..",
cp->idx, cp->transmitter_cnt));
fmt_id = cp->port->info.fmt.id;
size = cp->port->info.fmt.det.vid.size;
for (i = 0; i < cp->transmitter_cnt; ++i) {
vconf_port *tr = vid_conf->ports[cp->transmitter_slots[i]];
/* Cleanup render states & pool */
cleanup_render_state(cp, i);
/* Gather format ID, size of each transmitter */
tr_fmt_id[i] = tr->port->info.fmt.id;
tr_size[i] = tr->port->info.fmt.det.vid.size;
}
/* If only one transmitter and it has matched format & size, just use
* plain memcpy(). Usually preview window or call stream window will
* have matched format & size with its source.
*/
if (cp->transmitter_cnt == 1 && fmt_id == tr_fmt_id[0] &&
pj_memcmp(&size, &tr_size[0], sizeof(size))==0)
{
TRACE_((THIS_FILE, "This port only has single source with "
"matched format & size, no conversion needed"));
return;
}
for (i = 0; i < cp->transmitter_cnt && i < 4; ++i) {
pj_pool_t *pool;
render_state *rs;
pjmedia_conversion_param cparam;
char tmp_buf[32];
/* Create pool & render state */
pj_ansi_snprintf(tmp_buf, sizeof(tmp_buf), "vcport_rs_%d->%d",
cp->transmitter_slots[i], cp->idx);
pool = pj_pool_create(cp->pool->factory, tmp_buf, 128, 128, NULL);
cp->render_pool[i] = pool;
rs = cp->render_states[i] = PJ_POOL_ZALLOC_T(pool, render_state);
TRACE_((THIS_FILE, "Created render state for connection %d->%d",
cp->transmitter_slots[i], cp->idx));
/* Setup format & frame */
rs->src_fmt_id = tr_fmt_id[i];
rs->dst_fmt_id = fmt_id;
rs->src_frame_size = tr_size[i];
rs->dst_frame_size = size;
/* For now, draw the whole source frame, will adjust ratio later */
rs->src_rect.coord.x = rs->src_rect.coord.y = 0;
rs->src_rect.size = tr_size[i];
/* Setup layout */
if (cp->transmitter_cnt == 1) {
rs->dst_rect.coord.x = rs->dst_rect.coord.y = 0;
rs->dst_rect.size = size;
} else if (cp->transmitter_cnt == 2) {
if (is_landscape(&size)) {
/*
* |
* Source 0 | Source 1
* |
*/
rs->dst_rect.coord.x = i * (size.w/2);
rs->dst_rect.coord.y = 0;
rs->dst_rect.size.w = size.w / 2;
rs->dst_rect.size.h = size.h;
} else {
/*
* Source 0
* --------
* Source 1
*/
rs->dst_rect.coord.x = 0;
rs->dst_rect.coord.y = i * (size.h/2);
rs->dst_rect.size.w = size.w;
rs->dst_rect.size.h = size.h / 2;
}