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/*
* Tee output protocol
* Copyright (c) 2016 Michael Niedermayer
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include "libavutil/avstring.h"
#include "libavutil/dict.h"
#include "libavutil/error.h"
#include "libavutil/mem.h"
#include "tee_common.h"
#include "url.h"
typedef struct ChildContext {
URLContext *url_context;
} ChildContext;
typedef struct TeeContext {
int child_count;
ChildContext *child;
} TeeContext;
static const char *const child_delim = "|";
static int tee_write(URLContext *h, const unsigned char *buf, int size)
{
TeeContext *c = h->priv_data;
int i;
int main_ret = size;
for (i=0; i<c->child_count; i++) {
int ret = ffurl_write(c->child[i].url_context, buf, size);
if (ret < 0)
main_ret = ret;
}
return main_ret;
}
static int tee_close(URLContext *h)
{
TeeContext *c = h->priv_data;
int i;
int main_ret = 0;
for (i=0; i<c->child_count; i++) {
int ret = ffurl_closep(&c->child[i].url_context);
if (ret < 0)
main_ret = ret;
}
av_freep(&c->child);
c->child_count = 0;
return main_ret;
}
static int tee_open(URLContext *h, const char *filename, int flags)
{
TeeContext *c = h->priv_data;
int ret, i;
av_strstart(filename, "tee:", &filename);
while (*filename) {
char *child_string = av_get_token(&filename, child_delim);
char *child_name = NULL;
void *tmp;
AVDictionary *options = NULL;
if (!child_string) {
ret = AVERROR(ENOMEM);
goto fail;
}
tmp = av_realloc_array(c->child, c->child_count + 1, sizeof(*c->child));
if (!tmp) {
ret = AVERROR(ENOMEM);
goto loop_fail;
}
c->child = tmp;
memset(&c->child[c->child_count], 0, sizeof(c->child[c->child_count]));
ret = ff_tee_parse_slave_options(h, child_string, &options, &child_name);
if (ret < 0)
goto loop_fail;
ret = ffurl_open_whitelist(&c->child[c->child_count].url_context, child_name, flags,
&h->interrupt_callback, &options,
h->protocol_whitelist, h->protocol_blacklist,
h);
loop_fail:
av_freep(&child_string);
av_dict_free(&options);
if (ret < 0)
goto fail;
c->child_count++;
if (strspn(filename, child_delim))
filename++;
}
h->is_streamed = 0;
for (i=0; i<c->child_count; i++) {
h->is_streamed |= c->child[i].url_context->is_streamed;
}
h->max_packet_size = 0;
for (i = 0; i < c->child_count; i++) {
int max = c->child[i].url_context->max_packet_size;
if (!max)
continue;
if (!h->max_packet_size)
h->max_packet_size = max;
else if (h->max_packet_size > max)
h->max_packet_size = max;
}
return 0;
fail:
tee_close(h);
return ret;
}
const URLProtocol ff_tee_protocol = {
.name = "tee",
.url_open = tee_open,
.url_write = tee_write,
.url_close = tee_close,
.priv_data_size = sizeof(TeeContext),
.default_whitelist = "crypto,file,http,https,httpproxy,rtmp,tcp,tls"
};
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