PeerStreamer

/*

 * RTMP network protocol

 * Copyright (c) 2010 Howard Chu

 *

 * This file is part of Libav.

 *

 * Libav 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.

 *

 * Libav 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 Libav; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

/**

 * @file

 * RTMP protocol based on http://rtmpdump.mplayerhq.hu/ librtmp

 */

#include "avformat.h"

#include <librtmp/rtmp.h>

#include <librtmp/log.h>

static void rtmp_log(int level, const char *fmt, va_list args)

{

    switch (level) {

    default:

    case RTMP_LOGCRIT:    level = AV_LOG_FATAL;   break;

    case RTMP_LOGERROR:   level = AV_LOG_ERROR;   break;

    case RTMP_LOGWARNING: level = AV_LOG_WARNING; break;

    case RTMP_LOGINFO:    level = AV_LOG_INFO;    break;

    case RTMP_LOGDEBUG:   level = AV_LOG_VERBOSE; break;

    case RTMP_LOGDEBUG2:  level = AV_LOG_DEBUG;   break;

    }

    av_vlog(NULL, level, fmt, args);

    av_log(NULL, level, "\n");

}

static int rtmp_close(URLContext *s)

{

    RTMP *r = s->priv_data;

    RTMP_Close(r);

    av_free(r);

    return 0;

}

/**

 * Open RTMP connection and verify that the stream can be played.

 *

 * URL syntax: rtmp://server[:port][/app][/playpath][ keyword=value]...

 *             where 'app' is first one or two directories in the path

 *             (e.g. /ondemand/, /flash/live/, etc.)

 *             and 'playpath' is a file name (the rest of the path,

 *             may be prefixed with "mp4:")

 *

 *             Additional RTMP library options may be appended as

 *             space-separated key-value pairs.

 */

static int rtmp_open(URLContext *s, const char *uri, int flags)

{

    RTMP *r;

    int rc;

    r = av_mallocz(sizeof(RTMP));

    if (!r)

        return AVERROR(ENOMEM);

    switch (av_log_get_level()) {

    default:

    case AV_LOG_FATAL:   rc = RTMP_LOGCRIT;    break;

    case AV_LOG_ERROR:   rc = RTMP_LOGERROR;   break;

    case AV_LOG_WARNING: rc = RTMP_LOGWARNING; break;

    case AV_LOG_INFO:    rc = RTMP_LOGINFO;    break;

    case AV_LOG_VERBOSE: rc = RTMP_LOGDEBUG;   break;

    case AV_LOG_DEBUG:   rc = RTMP_LOGDEBUG2;  break;

    }

    RTMP_LogSetLevel(rc);

    RTMP_LogSetCallback(rtmp_log);

    RTMP_Init(r);

    if (!RTMP_SetupURL(r, s->filename)) {

        rc = -1;

        goto fail;

    }

    if (flags & URL_WRONLY)

        RTMP_EnableWrite(r);

    if (!RTMP_Connect(r, NULL) || !RTMP_ConnectStream(r, 0)) {

        rc = -1;

        goto fail;

    }

    s->priv_data   = r;

    s->is_streamed = 1;

    return 0;

fail:

    av_free(r);

    return rc;

}

static int rtmp_write(URLContext *s, const uint8_t *buf, int size)

{

    RTMP *r = s->priv_data;

    return RTMP_Write(r, buf, size);

}

static int rtmp_read(URLContext *s, uint8_t *buf, int size)

{

    RTMP *r = s->priv_data;

    return RTMP_Read(r, buf, size);

}

static int rtmp_read_pause(URLContext *s, int pause)

{

    RTMP *r = s->priv_data;

    if (!RTMP_Pause(r, pause))

        return -1;

    return 0;

}

static int64_t rtmp_read_seek(URLContext *s, int stream_index,

                              int64_t timestamp, int flags)

{

    RTMP *r = s->priv_data;

    if (flags & AVSEEK_FLAG_BYTE)

        return AVERROR(ENOSYS);

    /* seeks are in milliseconds */

    if (stream_index < 0)

        timestamp = av_rescale_rnd(timestamp, 1000, AV_TIME_BASE,

            flags & AVSEEK_FLAG_BACKWARD ? AV_ROUND_DOWN : AV_ROUND_UP);

    if (!RTMP_SendSeek(r, timestamp))

        return -1;

    return timestamp;

}

static int rtmp_get_file_handle(URLContext *s)

{

    RTMP *r = s->priv_data;

    return RTMP_Socket(r);

}

URLProtocol ff_rtmp_protocol = {

    "rtmp",

    rtmp_open,

    rtmp_read,

    rtmp_write,

    NULL,                   /* seek */

    rtmp_close,

    NULL,                   /* next */

    rtmp_read_pause,

    rtmp_read_seek,

    rtmp_get_file_handle

};

URLProtocol ff_rtmpt_protocol = {

    "rtmpt",

    rtmp_open,

    rtmp_read,

    rtmp_write,

    NULL,                   /* seek */

    rtmp_close,

    NULL,                   /* next */

    rtmp_read_pause,

    rtmp_read_seek,

    rtmp_get_file_handle

};

URLProtocol ff_rtmpe_protocol = {

    "rtmpe",

    rtmp_open,

    rtmp_read,

    rtmp_write,

    NULL,                   /* seek */

    rtmp_close,

    NULL,                   /* next */

    rtmp_read_pause,

    rtmp_read_seek,

    rtmp_get_file_handle

};

URLProtocol ff_rtmpte_protocol = {

    "rtmpte",

    rtmp_open,

    rtmp_read,

    rtmp_write,

    NULL,                   /* seek */

    rtmp_close,

    NULL,                   /* next */

    rtmp_read_pause,

    rtmp_read_seek,

    rtmp_get_file_handle

};

URLProtocol ff_rtmps_protocol = {

    "rtmps",

    rtmp_open,

    rtmp_read,

    rtmp_write,

    NULL,                   /* seek */

    rtmp_close,

    NULL,                   /* next */

    rtmp_read_pause,

    rtmp_read_seek,

    rtmp_get_file_handle

};