138 lines
2.9 KiB
C
138 lines
2.9 KiB
C
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/*
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* Copyright (C) 2010 Julien BLACHE <jb@jblache.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdlib.h>
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#include <libavformat/avformat.h>
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#include <event.h>
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#include "logger.h"
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#include "ffmpeg_url_evbuffer.h"
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/*
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* FFmpeg URL Protocol handler for evbuffers
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*
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* URL: evbuffer:0x03FB33DA ("evbuffer:%p")
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*/
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static int
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url_evbuffer_open(URLContext *h, const char *filename, int flags)
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{
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const char *p;
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char *end;
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unsigned long evbuffer_addr;
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if (flags != URL_WRONLY)
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{
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DPRINTF(E_LOG, L_FFMPEG, "Flags other than URL_WRONLY not supported while opening '%s'\n", filename);
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return AVERROR(EIO);
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}
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p = strchr(filename, ':');
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if (!p)
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{
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DPRINTF(E_LOG, L_FFMPEG, "Malformed evbuffer URL: '%s'\n", filename);
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return AVERROR(EIO);
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}
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p++;
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errno = 0;
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evbuffer_addr = strtoul(p, &end, 16);
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if (((errno == ERANGE) && (evbuffer_addr == ULONG_MAX))
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|| ((errno != 0) && (evbuffer_addr == 0)))
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{
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DPRINTF(E_LOG, L_FFMPEG, "Invalid buffer address in URL: '%s'\n", filename);
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return AVERROR(EIO);
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}
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if (end == p)
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{
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DPRINTF(E_LOG, L_FFMPEG, "No buffer address found in URL: '%s'\n", filename);
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return AVERROR(EIO);
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}
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h->priv_data = (void *)evbuffer_addr;
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if (!h->priv_data)
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{
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DPRINTF(E_LOG, L_FFMPEG, "Got a NULL buffer address from URL '%s'\n", filename);
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return AVERROR(EIO);
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}
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/* Seek not supported */
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h->is_streamed = 1;
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return 0;
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}
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static int
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url_evbuffer_close(URLContext *h)
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{
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h->priv_data = NULL;
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return 0;
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}
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static int
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url_evbuffer_write(URLContext *h, unsigned char *buf, int size)
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{
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struct evbuffer *evbuf;
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int ret;
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evbuf = (struct evbuffer *)h->priv_data;
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if (!evbuf)
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{
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DPRINTF(E_LOG, L_FFMPEG, "Write called on evbuffer URL with priv_data = NULL!\n");
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return -1;
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}
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ret = evbuffer_add(evbuf, buf, size);
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return (ret == 0) ? size : -1;
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}
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URLProtocol evbuffer_protocol = {
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.name = "evbuffer",
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.url_open = url_evbuffer_open,
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.url_close = url_evbuffer_close,
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.url_write = url_evbuffer_write,
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};
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int
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register_ffmpeg_evbuffer_url_protocol(void)
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{
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int ret;
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ret = av_register_protocol(&evbuffer_protocol);
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return ret;
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}
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