forked from KolibriOS/kolibrios
827 lines
29 KiB
C
827 lines
29 KiB
C
/*
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* Copyright (c) 2011, Luca Barbato
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file generic segmenter
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* M3U8 specification can be find here:
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* @url{http://tools.ietf.org/id/draft-pantos-http-live-streaming}
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*/
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/* #define DEBUG */
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#include <float.h>
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#include "avformat.h"
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#include "internal.h"
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#include "libavutil/avassert.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "libavutil/avstring.h"
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#include "libavutil/parseutils.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/timestamp.h"
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typedef struct SegmentListEntry {
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int index;
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double start_time, end_time;
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int64_t start_pts;
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int64_t offset_pts;
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char filename[1024];
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struct SegmentListEntry *next;
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} SegmentListEntry;
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typedef enum {
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LIST_TYPE_UNDEFINED = -1,
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LIST_TYPE_FLAT = 0,
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LIST_TYPE_CSV,
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LIST_TYPE_M3U8,
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LIST_TYPE_EXT, ///< deprecated
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LIST_TYPE_FFCONCAT,
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LIST_TYPE_NB,
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} ListType;
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#define SEGMENT_LIST_FLAG_CACHE 1
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#define SEGMENT_LIST_FLAG_LIVE 2
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typedef struct {
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const AVClass *class; /**< Class for private options. */
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int segment_idx; ///< index of the segment file to write, starting from 0
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int segment_idx_wrap; ///< number after which the index wraps
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int segment_count; ///< number of segment files already written
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AVOutputFormat *oformat;
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AVFormatContext *avf;
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char *format; ///< format to use for output segment files
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char *list; ///< filename for the segment list file
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int list_flags; ///< flags affecting list generation
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int list_size; ///< number of entries for the segment list file
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ListType list_type; ///< set the list type
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AVIOContext *list_pb; ///< list file put-byte context
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char *time_str; ///< segment duration specification string
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int64_t time; ///< segment duration
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char *times_str; ///< segment times specification string
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int64_t *times; ///< list of segment interval specification
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int nb_times; ///< number of elments in the times array
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char *frames_str; ///< segment frame numbers specification string
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int *frames; ///< list of frame number specification
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int nb_frames; ///< number of elments in the frames array
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int frame_count;
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int64_t time_delta;
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int individual_header_trailer; /**< Set by a private option. */
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int write_header_trailer; /**< Set by a private option. */
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int reset_timestamps; ///< reset timestamps at the begin of each segment
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int64_t initial_offset; ///< initial timestamps offset, expressed in microseconds
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char *reference_stream_specifier; ///< reference stream specifier
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int reference_stream_index;
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SegmentListEntry cur_entry;
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SegmentListEntry *segment_list_entries;
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SegmentListEntry *segment_list_entries_end;
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int is_first_pkt; ///< tells if it is the first packet in the segment
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} SegmentContext;
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static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
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{
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int needs_quoting = !!str[strcspn(str, "\",\n\r")];
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if (needs_quoting)
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avio_w8(ctx, '"');
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for (; *str; str++) {
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if (*str == '"')
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avio_w8(ctx, '"');
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avio_w8(ctx, *str);
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}
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if (needs_quoting)
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avio_w8(ctx, '"');
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}
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static int segment_mux_init(AVFormatContext *s)
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{
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SegmentContext *seg = s->priv_data;
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AVFormatContext *oc;
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int i;
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seg->avf = oc = avformat_alloc_context();
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if (!oc)
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return AVERROR(ENOMEM);
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oc->oformat = seg->oformat;
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oc->interrupt_callback = s->interrupt_callback;
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av_dict_copy(&oc->metadata, s->metadata, 0);
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for (i = 0; i < s->nb_streams; i++) {
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AVStream *st;
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AVCodecContext *icodec, *ocodec;
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if (!(st = avformat_new_stream(oc, NULL)))
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return AVERROR(ENOMEM);
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icodec = s->streams[i]->codec;
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ocodec = st->codec;
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avcodec_copy_context(ocodec, icodec);
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if (!oc->oformat->codec_tag ||
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av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == ocodec->codec_id ||
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av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0) {
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ocodec->codec_tag = icodec->codec_tag;
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} else {
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ocodec->codec_tag = 0;
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}
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st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
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}
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return 0;
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}
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static int set_segment_filename(AVFormatContext *s)
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{
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SegmentContext *seg = s->priv_data;
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AVFormatContext *oc = seg->avf;
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if (seg->segment_idx_wrap)
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seg->segment_idx %= seg->segment_idx_wrap;
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if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
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s->filename, seg->segment_idx) < 0) {
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av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->filename);
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return AVERROR(EINVAL);
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}
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av_strlcpy(seg->cur_entry.filename, oc->filename, sizeof(seg->cur_entry.filename));
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return 0;
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}
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static int segment_start(AVFormatContext *s, int write_header)
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{
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SegmentContext *seg = s->priv_data;
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AVFormatContext *oc = seg->avf;
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int err = 0;
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if (write_header) {
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avformat_free_context(oc);
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seg->avf = NULL;
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if ((err = segment_mux_init(s)) < 0)
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return err;
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oc = seg->avf;
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}
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seg->segment_idx++;
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if ((err = set_segment_filename(s)) < 0)
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return err;
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if ((err = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
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&s->interrupt_callback, NULL)) < 0)
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return err;
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if (oc->oformat->priv_class && oc->priv_data)
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av_opt_set(oc->priv_data, "resend_headers", "1", 0); /* mpegts specific */
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if (write_header) {
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if ((err = avformat_write_header(oc, NULL)) < 0)
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return err;
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}
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seg->is_first_pkt = 1;
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return 0;
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}
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static int segment_list_open(AVFormatContext *s)
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{
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SegmentContext *seg = s->priv_data;
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int ret;
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ret = avio_open2(&seg->list_pb, seg->list, AVIO_FLAG_WRITE,
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&s->interrupt_callback, NULL);
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if (ret < 0)
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return ret;
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if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) {
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SegmentListEntry *entry;
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double max_duration = 0;
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avio_printf(seg->list_pb, "#EXTM3U\n");
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avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
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avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index);
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avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n",
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seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO");
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for (entry = seg->segment_list_entries; entry; entry = entry->next)
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max_duration = FFMAX(max_duration, entry->end_time - entry->start_time);
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avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration));
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} else if (seg->list_type == LIST_TYPE_FFCONCAT) {
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avio_printf(seg->list_pb, "ffconcat version 1.0\n");
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}
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return ret;
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}
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static void segment_list_print_entry(AVIOContext *list_ioctx,
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ListType list_type,
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const SegmentListEntry *list_entry,
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void *log_ctx)
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{
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switch (list_type) {
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case LIST_TYPE_FLAT:
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avio_printf(list_ioctx, "%s\n", list_entry->filename);
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break;
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case LIST_TYPE_CSV:
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case LIST_TYPE_EXT:
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print_csv_escaped_str(list_ioctx, list_entry->filename);
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avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time);
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break;
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case LIST_TYPE_M3U8:
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avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n",
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list_entry->end_time - list_entry->start_time, list_entry->filename);
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break;
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case LIST_TYPE_FFCONCAT:
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{
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char *buf;
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if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) {
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av_log(log_ctx, AV_LOG_WARNING,
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"Error writing list entry '%s' in list file\n", list_entry->filename);
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return;
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}
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avio_printf(list_ioctx, "file %s\n", buf);
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av_free(buf);
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break;
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}
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default:
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av_assert0(!"Invalid list type");
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}
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}
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static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
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{
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SegmentContext *seg = s->priv_data;
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AVFormatContext *oc = seg->avf;
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int ret = 0;
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av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */
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if (write_trailer)
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ret = av_write_trailer(oc);
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if (ret < 0)
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av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n",
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oc->filename);
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if (seg->list) {
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if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) {
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SegmentListEntry *entry = av_mallocz(sizeof(*entry));
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if (!entry) {
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ret = AVERROR(ENOMEM);
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goto end;
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}
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/* append new element */
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memcpy(entry, &seg->cur_entry, sizeof(*entry));
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if (!seg->segment_list_entries)
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seg->segment_list_entries = seg->segment_list_entries_end = entry;
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else
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seg->segment_list_entries_end->next = entry;
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seg->segment_list_entries_end = entry;
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/* drop first item */
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if (seg->list_size && seg->segment_count > seg->list_size) {
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entry = seg->segment_list_entries;
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seg->segment_list_entries = seg->segment_list_entries->next;
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av_freep(&entry);
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}
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avio_close(seg->list_pb);
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if ((ret = segment_list_open(s)) < 0)
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goto end;
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for (entry = seg->segment_list_entries; entry; entry = entry->next)
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segment_list_print_entry(seg->list_pb, seg->list_type, entry, s);
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if (seg->list_type == LIST_TYPE_M3U8 && is_last)
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avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
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} else {
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segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry, s);
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}
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avio_flush(seg->list_pb);
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}
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av_log(s, AV_LOG_VERBOSE, "segment:'%s' count:%d ended\n",
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seg->avf->filename, seg->segment_count);
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seg->segment_count++;
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end:
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avio_close(oc->pb);
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return ret;
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}
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static int parse_times(void *log_ctx, int64_t **times, int *nb_times,
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const char *times_str)
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{
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char *p;
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int i, ret = 0;
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char *times_str1 = av_strdup(times_str);
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char *saveptr = NULL;
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if (!times_str1)
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return AVERROR(ENOMEM);
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#define FAIL(err) ret = err; goto end
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*nb_times = 1;
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for (p = times_str1; *p; p++)
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if (*p == ',')
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(*nb_times)++;
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*times = av_malloc(sizeof(**times) * *nb_times);
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if (!*times) {
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av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n");
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FAIL(AVERROR(ENOMEM));
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}
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p = times_str1;
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for (i = 0; i < *nb_times; i++) {
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int64_t t;
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char *tstr = av_strtok(p, ",", &saveptr);
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p = NULL;
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if (!tstr || !tstr[0]) {
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av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n",
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times_str);
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FAIL(AVERROR(EINVAL));
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}
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ret = av_parse_time(&t, tstr, 1);
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if (ret < 0) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Invalid time duration specification '%s' in times list %s\n", tstr, times_str);
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FAIL(AVERROR(EINVAL));
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}
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(*times)[i] = t;
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/* check on monotonicity */
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if (i && (*times)[i-1] > (*times)[i]) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Specified time %f is greater than the following time %f\n",
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(float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000);
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FAIL(AVERROR(EINVAL));
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}
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}
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end:
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av_free(times_str1);
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return ret;
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}
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static int parse_frames(void *log_ctx, int **frames, int *nb_frames,
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const char *frames_str)
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{
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char *p;
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int i, ret = 0;
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char *frames_str1 = av_strdup(frames_str);
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char *saveptr = NULL;
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if (!frames_str1)
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return AVERROR(ENOMEM);
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#define FAIL(err) ret = err; goto end
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*nb_frames = 1;
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for (p = frames_str1; *p; p++)
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if (*p == ',')
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(*nb_frames)++;
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*frames = av_malloc(sizeof(**frames) * *nb_frames);
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if (!*frames) {
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av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n");
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FAIL(AVERROR(ENOMEM));
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}
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p = frames_str1;
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for (i = 0; i < *nb_frames; i++) {
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long int f;
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char *tailptr;
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char *fstr = av_strtok(p, ",", &saveptr);
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p = NULL;
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if (!fstr) {
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av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n",
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frames_str);
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FAIL(AVERROR(EINVAL));
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}
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f = strtol(fstr, &tailptr, 10);
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if (*tailptr || f <= 0 || f >= INT_MAX) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Invalid argument '%s', must be a positive integer <= INT64_MAX\n",
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fstr);
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FAIL(AVERROR(EINVAL));
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}
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(*frames)[i] = f;
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/* check on monotonicity */
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if (i && (*frames)[i-1] > (*frames)[i]) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Specified frame %d is greater than the following frame %d\n",
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(*frames)[i], (*frames)[i-1]);
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FAIL(AVERROR(EINVAL));
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}
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}
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end:
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av_free(frames_str1);
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return ret;
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}
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|
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static int open_null_ctx(AVIOContext **ctx)
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{
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int buf_size = 32768;
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uint8_t *buf = av_malloc(buf_size);
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if (!buf)
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return AVERROR(ENOMEM);
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*ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL);
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|
if (!*ctx) {
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av_free(buf);
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return AVERROR(ENOMEM);
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}
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return 0;
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}
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|
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static void close_null_ctx(AVIOContext *pb)
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{
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av_free(pb->buffer);
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av_free(pb);
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}
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|
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static int select_reference_stream(AVFormatContext *s)
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{
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SegmentContext *seg = s->priv_data;
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int ret, i;
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|
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seg->reference_stream_index = -1;
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if (!strcmp(seg->reference_stream_specifier, "auto")) {
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/* select first index of type with highest priority */
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int type_index_map[AVMEDIA_TYPE_NB];
|
|
static const enum AVMediaType type_priority_list[] = {
|
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AVMEDIA_TYPE_VIDEO,
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AVMEDIA_TYPE_AUDIO,
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AVMEDIA_TYPE_SUBTITLE,
|
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AVMEDIA_TYPE_DATA,
|
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AVMEDIA_TYPE_ATTACHMENT
|
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};
|
|
enum AVMediaType type;
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|
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for (i = 0; i < AVMEDIA_TYPE_NB; i++)
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type_index_map[i] = -1;
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|
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/* select first index for each type */
|
|
for (i = 0; i < s->nb_streams; i++) {
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type = s->streams[i]->codec->codec_type;
|
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if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1
|
|
/* ignore attached pictures/cover art streams */
|
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&& !(s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC))
|
|
type_index_map[type] = i;
|
|
}
|
|
|
|
for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
|
|
type = type_priority_list[i];
|
|
if ((seg->reference_stream_index = type_index_map[type]) >= 0)
|
|
break;
|
|
}
|
|
} else {
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
ret = avformat_match_stream_specifier(s, s->streams[i],
|
|
seg->reference_stream_specifier);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret > 0) {
|
|
seg->reference_stream_index = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (seg->reference_stream_index < 0) {
|
|
av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
|
|
seg->reference_stream_specifier);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int seg_write_header(AVFormatContext *s)
|
|
{
|
|
SegmentContext *seg = s->priv_data;
|
|
AVFormatContext *oc = NULL;
|
|
int ret;
|
|
|
|
seg->segment_count = 0;
|
|
if (!seg->write_header_trailer)
|
|
seg->individual_header_trailer = 0;
|
|
|
|
if (!!seg->time_str + !!seg->times_str + !!seg->frames_str > 1) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"segment_time, segment_times, and segment_frames options "
|
|
"are mutually exclusive, select just one of them\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (seg->times_str) {
|
|
if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
|
|
return ret;
|
|
} else if (seg->frames_str) {
|
|
if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0)
|
|
return ret;
|
|
} else {
|
|
/* set default value if not specified */
|
|
if (!seg->time_str)
|
|
seg->time_str = av_strdup("2");
|
|
if ((ret = av_parse_time(&seg->time, seg->time_str, 1)) < 0) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Invalid time duration specification '%s' for segment_time option\n",
|
|
seg->time_str);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (seg->list) {
|
|
if (seg->list_type == LIST_TYPE_UNDEFINED) {
|
|
if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV;
|
|
else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT;
|
|
else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8;
|
|
else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT;
|
|
else seg->list_type = LIST_TYPE_FLAT;
|
|
}
|
|
if ((ret = segment_list_open(s)) < 0)
|
|
goto fail;
|
|
}
|
|
if (seg->list_type == LIST_TYPE_EXT)
|
|
av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
|
|
|
|
if ((ret = select_reference_stream(s)) < 0)
|
|
goto fail;
|
|
av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n",
|
|
seg->reference_stream_index,
|
|
av_get_media_type_string(s->streams[seg->reference_stream_index]->codec->codec_type));
|
|
|
|
seg->oformat = av_guess_format(seg->format, s->filename, NULL);
|
|
|
|
if (!seg->oformat) {
|
|
ret = AVERROR_MUXER_NOT_FOUND;
|
|
goto fail;
|
|
}
|
|
if (seg->oformat->flags & AVFMT_NOFILE) {
|
|
av_log(s, AV_LOG_ERROR, "format %s not supported.\n",
|
|
seg->oformat->name);
|
|
ret = AVERROR(EINVAL);
|
|
goto fail;
|
|
}
|
|
|
|
if ((ret = segment_mux_init(s)) < 0)
|
|
goto fail;
|
|
oc = seg->avf;
|
|
|
|
if ((ret = set_segment_filename(s)) < 0)
|
|
goto fail;
|
|
|
|
if (seg->write_header_trailer) {
|
|
if ((ret = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
|
|
&s->interrupt_callback, NULL)) < 0)
|
|
goto fail;
|
|
} else {
|
|
if ((ret = open_null_ctx(&oc->pb)) < 0)
|
|
goto fail;
|
|
}
|
|
|
|
if ((ret = avformat_write_header(oc, NULL)) < 0) {
|
|
avio_close(oc->pb);
|
|
goto fail;
|
|
}
|
|
seg->is_first_pkt = 1;
|
|
|
|
if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0)
|
|
s->avoid_negative_ts = 1;
|
|
|
|
if (!seg->write_header_trailer) {
|
|
close_null_ctx(oc->pb);
|
|
if ((ret = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
|
|
&s->interrupt_callback, NULL)) < 0)
|
|
goto fail;
|
|
}
|
|
|
|
fail:
|
|
if (ret) {
|
|
if (seg->list)
|
|
avio_close(seg->list_pb);
|
|
if (seg->avf)
|
|
avformat_free_context(seg->avf);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
SegmentContext *seg = s->priv_data;
|
|
AVFormatContext *oc = seg->avf;
|
|
AVStream *st = s->streams[pkt->stream_index];
|
|
int64_t end_pts = INT64_MAX, offset;
|
|
int start_frame = INT_MAX;
|
|
int ret;
|
|
|
|
if (seg->times) {
|
|
end_pts = seg->segment_count < seg->nb_times ?
|
|
seg->times[seg->segment_count] : INT64_MAX;
|
|
} else if (seg->frames) {
|
|
start_frame = seg->segment_count <= seg->nb_frames ?
|
|
seg->frames[seg->segment_count] : INT_MAX;
|
|
} else {
|
|
end_pts = seg->time * (seg->segment_count+1);
|
|
}
|
|
|
|
av_dlog(s, "packet stream:%d pts:%s pts_time:%s is_key:%d frame:%d\n",
|
|
pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
|
|
pkt->flags & AV_PKT_FLAG_KEY,
|
|
pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1);
|
|
|
|
if (pkt->stream_index == seg->reference_stream_index &&
|
|
pkt->flags & AV_PKT_FLAG_KEY &&
|
|
(seg->frame_count >= start_frame ||
|
|
(pkt->pts != AV_NOPTS_VALUE &&
|
|
av_compare_ts(pkt->pts, st->time_base,
|
|
end_pts-seg->time_delta, AV_TIME_BASE_Q) >= 0))) {
|
|
if ((ret = segment_end(s, seg->individual_header_trailer, 0)) < 0)
|
|
goto fail;
|
|
|
|
if ((ret = segment_start(s, seg->individual_header_trailer)) < 0)
|
|
goto fail;
|
|
|
|
oc = seg->avf;
|
|
|
|
seg->cur_entry.index = seg->segment_idx;
|
|
seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);
|
|
seg->cur_entry.start_pts = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q);
|
|
} else if (pkt->pts != AV_NOPTS_VALUE) {
|
|
seg->cur_entry.end_time =
|
|
FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
|
|
}
|
|
|
|
if (seg->is_first_pkt) {
|
|
av_log(s, AV_LOG_DEBUG, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n",
|
|
seg->avf->filename, pkt->stream_index,
|
|
av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), seg->frame_count);
|
|
seg->is_first_pkt = 0;
|
|
}
|
|
|
|
av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s",
|
|
pkt->stream_index,
|
|
av_ts2timestr(seg->cur_entry.start_pts, &AV_TIME_BASE_Q),
|
|
av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
|
|
av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
|
|
|
|
/* compute new timestamps */
|
|
offset = av_rescale_q(seg->initial_offset - (seg->reset_timestamps ? seg->cur_entry.start_pts : 0),
|
|
AV_TIME_BASE_Q, st->time_base);
|
|
if (pkt->pts != AV_NOPTS_VALUE)
|
|
pkt->pts += offset;
|
|
if (pkt->dts != AV_NOPTS_VALUE)
|
|
pkt->dts += offset;
|
|
|
|
av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
|
|
av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
|
|
av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
|
|
|
|
ret = ff_write_chained(oc, pkt->stream_index, pkt, s);
|
|
|
|
fail:
|
|
if (pkt->stream_index == seg->reference_stream_index)
|
|
seg->frame_count++;
|
|
|
|
if (ret < 0) {
|
|
if (seg->list)
|
|
avio_close(seg->list_pb);
|
|
avformat_free_context(oc);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int seg_write_trailer(struct AVFormatContext *s)
|
|
{
|
|
SegmentContext *seg = s->priv_data;
|
|
AVFormatContext *oc = seg->avf;
|
|
SegmentListEntry *cur, *next;
|
|
|
|
int ret;
|
|
if (!seg->write_header_trailer) {
|
|
if ((ret = segment_end(s, 0, 1)) < 0)
|
|
goto fail;
|
|
open_null_ctx(&oc->pb);
|
|
ret = av_write_trailer(oc);
|
|
close_null_ctx(oc->pb);
|
|
} else {
|
|
ret = segment_end(s, 1, 1);
|
|
}
|
|
fail:
|
|
if (seg->list)
|
|
avio_close(seg->list_pb);
|
|
|
|
av_opt_free(seg);
|
|
av_freep(&seg->times);
|
|
av_freep(&seg->frames);
|
|
|
|
cur = seg->segment_list_entries;
|
|
while (cur) {
|
|
next = cur->next;
|
|
av_free(cur);
|
|
cur = next;
|
|
}
|
|
|
|
avformat_free_context(oc);
|
|
return ret;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(SegmentContext, x)
|
|
#define E AV_OPT_FLAG_ENCODING_PARAM
|
|
static const AVOption options[] = {
|
|
{ "reference_stream", "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, CHAR_MIN, CHAR_MAX, E },
|
|
{ "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
|
|
{ "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
|
|
|
|
{ "segment_list_flags","set flags affecting segment list generation", OFFSET(list_flags), AV_OPT_TYPE_FLAGS, {.i64 = SEGMENT_LIST_FLAG_CACHE }, 0, UINT_MAX, E, "list_flags"},
|
|
{ "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, "list_flags"},
|
|
{ "live", "enable live-friendly list generation (useful for HLS)", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_LIVE }, INT_MIN, INT_MAX, E, "list_flags"},
|
|
|
|
{ "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
|
|
|
|
{ "segment_list_type", "set the segment list type", OFFSET(list_type), AV_OPT_TYPE_INT, {.i64 = LIST_TYPE_UNDEFINED}, -1, LIST_TYPE_NB-1, E, "list_type" },
|
|
{ "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, "list_type" },
|
|
{ "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, E, "list_type" },
|
|
{ "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, E, "list_type" },
|
|
{ "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, "list_type" },
|
|
{ "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
|
|
{ "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
|
|
|
|
{ "segment_time", "set segment duration", OFFSET(time_str),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
|
|
{ "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 0, E },
|
|
{ "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
|
|
{ "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
|
|
{ "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
|
|
{ "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
|
|
|
|
{ "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E },
|
|
{ "write_header_trailer", "write a header to the first segment and a trailer to the last one", OFFSET(write_header_trailer), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E },
|
|
{ "reset_timestamps", "reset timestamps at the begin of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, E },
|
|
{ "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E },
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass seg_class = {
|
|
.class_name = "segment muxer",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVOutputFormat ff_segment_muxer = {
|
|
.name = "segment",
|
|
.long_name = NULL_IF_CONFIG_SMALL("segment"),
|
|
.priv_data_size = sizeof(SegmentContext),
|
|
.flags = AVFMT_NOFILE|AVFMT_GLOBALHEADER,
|
|
.write_header = seg_write_header,
|
|
.write_packet = seg_write_packet,
|
|
.write_trailer = seg_write_trailer,
|
|
.priv_class = &seg_class,
|
|
};
|
|
|
|
static const AVClass sseg_class = {
|
|
.class_name = "stream_segment muxer",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVOutputFormat ff_stream_segment_muxer = {
|
|
.name = "stream_segment,ssegment",
|
|
.long_name = NULL_IF_CONFIG_SMALL("streaming segment muxer"),
|
|
.priv_data_size = sizeof(SegmentContext),
|
|
.flags = AVFMT_NOFILE,
|
|
.write_header = seg_write_header,
|
|
.write_packet = seg_write_packet,
|
|
.write_trailer = seg_write_trailer,
|
|
.priv_class = &sseg_class,
|
|
};
|