/*
* Generic Segmenter
* Copyright (c) 2011, Luca Barbato
*
* 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
*/
#include "libavutil/avstring.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/mathematics.h"
#include "libavutil/parseutils.h"
#include "avformat.h"
#include "internal.h"
#include <strings.h>
#include <float.h>
typedef struct {
const AVClass *class; /**< Class for private options. */
int number;
AVFormatContext *avf;
char *format; /**< Set by a private option. */
char *pattern; /**< Set by a private option. */
char *path; /**< Set by a private option. */
float time; /**< Set by a private option. */
int64_t offset_time;
int64_t recording_time;
} SegmentContext;
#if CONFIG_SEGMENT_MUXER
static int segment_header(SegmentContext *s)
{
AVFormatContext *oc = s->avf;
int err = 0;
av_strlcpy(oc->filename, s->path, sizeof(oc->filename));
av_strlcatf(oc->filename, sizeof(oc->filename),
s->pattern, s->number++);
if ((err = avio_open(&oc->pb, oc->filename, AVIO_FLAG_WRITE)) < 0) {
return err;
}
if (!oc->priv_data && oc->oformat->priv_data_size > 0) {
oc->priv_data = av_mallocz(oc->oformat->priv_data_size);
if (!oc->priv_data) {
avio_close(oc->pb);
return AVERROR(ENOMEM);
}
}
if ((err = oc->oformat->write_header(oc)) < 0) {
avio_close(oc->pb);
av_freep(&oc->priv_data);
}
return err;
}
static int segment_trailer(AVFormatContext *oc)
{
int ret = 0;
if(oc->oformat->write_trailer)
ret = oc->oformat->write_trailer(oc);
avio_close(oc->pb);
av_freep(&oc->priv_data);
return ret;
}
static int seg_write_header(AVFormatContext *s)
{
SegmentContext *seg = s->priv_data;
AVFormatContext *oc;
int ret;
seg->number = 0;
seg->recording_time = seg->time*1000000;
seg->offset_time = 0;
if (!seg->path) {
char *t;
seg->path = av_strdup(s->filename);
t = strrchr(seg->path, '.');
if (t) *t = '\0';
}
oc = avformat_alloc_context();
if (!oc) {
return AVERROR(ENOMEM);
}
oc->oformat = av_guess_format(seg->format, NULL, NULL);
if (!oc->oformat) {
avformat_free_context(oc);
return AVERROR_MUXER_NOT_FOUND;
}
seg->avf = oc;
oc->streams = s->streams;
oc->nb_streams = s->nb_streams;
av_strlcpy(oc->filename, seg->path, sizeof(oc->filename));
av_strlcatf(oc->filename, sizeof(oc->filename),
seg->pattern, seg->number++);
if ((ret = avio_open(&oc->pb, oc->filename, AVIO_FLAG_WRITE)) < 0) {
avformat_free_context(oc);
return ret;
}
if ((ret = avformat_write_header(oc, NULL)) < 0) {
avio_close(oc->pb);
}
if (ret)
avformat_free_context(oc);
avio_printf(s->pb, "%s\n", oc->filename);
avio_flush(s->pb);
return ret;
}
static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
{
SegmentContext *seg = s->priv_data;
AVFormatContext *oc = seg->avf;
AVStream *st = oc->streams[pkt->stream_index];
int ret;
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
av_compare_ts(pkt->pts, st->time_base,
seg->recording_time*seg->number,
(AVRational){1, 1000000}) >= 0 &&
pkt->flags & AV_PKT_FLAG_KEY) {
av_log(s, AV_LOG_INFO, "I'd reset at %d %"PRId64"\n",
pkt->stream_index, pkt->pts);
ret = segment_trailer(oc);
if (!ret)
ret = segment_header(seg);
if (ret) {
avformat_free_context(oc);
return ret;
}
avio_printf(s->pb, "%s\n", oc->filename);
avio_flush(s->pb);
}
ret = oc->oformat->write_packet(oc, pkt);
return ret;
}
static int seg_write_trailer(struct AVFormatContext *s)
{
SegmentContext *seg = s->priv_data;
AVFormatContext *oc = seg->avf;
return segment_trailer(oc);
}
#endif /* CONFIG_SEGMENT_MUXER */
#define OFFSET(x) offsetof(SegmentContext, x)
#define E AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{ "container_format", "container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = "nut"}, 0, 0, E },
{ "segment_time", "segment lenght in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E },
{ "segment_pattern", "pattern to use in segment files", OFFSET(pattern),AV_OPT_TYPE_STRING, {.str = "%03d"}, 0, 0, E },
{ "segment_basename", "basename to use in segment files", OFFSET(path ),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
{ NULL },
};
static const AVClass seg_class = {
.class_name = "segment muxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
/* input
#if CONFIG_IMAGE2_DEMUXER
AVInputFormat ff_image2_demuxer = {
.name = "image2",
.long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
.priv_data_size = sizeof(VideoData),
.read_probe = read_probe,
.read_header = read_header,
.read_packet = read_packet,
.flags = AVFMT_NOFILE,
.priv_class = &img2_class,
};
#endif
*/
/* output */
#if CONFIG_SEGMENT_MUXER
AVOutputFormat ff_segment_muxer = {
.name = "segment",
.long_name = NULL_IF_CONFIG_SMALL("segment muxer"),
.extensions = "m3u8",
.priv_data_size = sizeof(SegmentContext),
.flags = AVFMT_GLOBALHEADER,
.write_header = seg_write_header,
.write_packet = seg_write_packet,
.write_trailer = seg_write_trailer,
.priv_class = &seg_class,
};
#endif