diff options
Diffstat (limited to 'libavformat/segment.c')
| -rw-r--r-- | libavformat/segment.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/libavformat/segment.c b/libavformat/segment.c new file mode 100644 index 0000000..80716bc --- /dev/null +++ b/libavformat/segment.c @@ -0,0 +1,234 @@ +/* + * 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 |
