LCOV - code coverage report
Current view: top level - libavformat - segment.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 324 558 58.1 %
Date: 2017-12-16 13:57:32 Functions: 13 18 72.2 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2011, Luca Barbato
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : /**
      22             :  * @file generic segmenter
      23             :  * M3U8 specification can be find here:
      24             :  * @url{http://tools.ietf.org/id/draft-pantos-http-live-streaming}
      25             :  */
      26             : 
      27             : #include <float.h>
      28             : #include <time.h>
      29             : 
      30             : #include "avformat.h"
      31             : #include "avio_internal.h"
      32             : #include "internal.h"
      33             : 
      34             : #include "libavutil/avassert.h"
      35             : #include "libavutil/internal.h"
      36             : #include "libavutil/log.h"
      37             : #include "libavutil/opt.h"
      38             : #include "libavutil/avstring.h"
      39             : #include "libavutil/parseutils.h"
      40             : #include "libavutil/mathematics.h"
      41             : #include "libavutil/time.h"
      42             : #include "libavutil/timecode.h"
      43             : #include "libavutil/time_internal.h"
      44             : #include "libavutil/timestamp.h"
      45             : 
      46             : typedef struct SegmentListEntry {
      47             :     int index;
      48             :     double start_time, end_time;
      49             :     int64_t start_pts;
      50             :     int64_t offset_pts;
      51             :     char *filename;
      52             :     struct SegmentListEntry *next;
      53             :     int64_t last_duration;
      54             : } SegmentListEntry;
      55             : 
      56             : typedef enum {
      57             :     LIST_TYPE_UNDEFINED = -1,
      58             :     LIST_TYPE_FLAT = 0,
      59             :     LIST_TYPE_CSV,
      60             :     LIST_TYPE_M3U8,
      61             :     LIST_TYPE_EXT, ///< deprecated
      62             :     LIST_TYPE_FFCONCAT,
      63             :     LIST_TYPE_NB,
      64             : } ListType;
      65             : 
      66             : #define SEGMENT_LIST_FLAG_CACHE 1
      67             : #define SEGMENT_LIST_FLAG_LIVE  2
      68             : 
      69             : typedef struct SegmentContext {
      70             :     const AVClass *class;  /**< Class for private options. */
      71             :     int segment_idx;       ///< index of the segment file to write, starting from 0
      72             :     int segment_idx_wrap;  ///< number after which the index wraps
      73             :     int segment_idx_wrap_nb;  ///< number of time the index has wraped
      74             :     int segment_count;     ///< number of segment files already written
      75             :     AVOutputFormat *oformat;
      76             :     AVFormatContext *avf;
      77             :     char *format;              ///< format to use for output segment files
      78             :     char *format_options_str;  ///< format options to use for output segment files
      79             :     AVDictionary *format_options;
      80             :     char *list;            ///< filename for the segment list file
      81             :     int   list_flags;      ///< flags affecting list generation
      82             :     int   list_size;       ///< number of entries for the segment list file
      83             : 
      84             :     int use_clocktime;    ///< flag to cut segments at regular clock time
      85             :     int64_t clocktime_offset; //< clock offset for cutting the segments at regular clock time
      86             :     int64_t clocktime_wrap_duration; //< wrapping duration considered for starting a new segment
      87             :     int64_t last_val;      ///< remember last time for wrap around detection
      88             :     int cut_pending;
      89             :     int header_written;    ///< whether we've already called avformat_write_header
      90             : 
      91             :     char *entry_prefix;    ///< prefix to add to list entry filenames
      92             :     int list_type;         ///< set the list type
      93             :     AVIOContext *list_pb;  ///< list file put-byte context
      94             :     char *time_str;        ///< segment duration specification string
      95             :     int64_t time;          ///< segment duration
      96             :     int use_strftime;      ///< flag to expand filename with strftime
      97             :     int increment_tc;      ///< flag to increment timecode if found
      98             : 
      99             :     char *times_str;       ///< segment times specification string
     100             :     int64_t *times;        ///< list of segment interval specification
     101             :     int nb_times;          ///< number of elments in the times array
     102             : 
     103             :     char *frames_str;      ///< segment frame numbers specification string
     104             :     int *frames;           ///< list of frame number specification
     105             :     int nb_frames;         ///< number of elments in the frames array
     106             :     int frame_count;       ///< total number of reference frames
     107             :     int segment_frame_count; ///< number of reference frames in the segment
     108             : 
     109             :     int64_t time_delta;
     110             :     int  individual_header_trailer; /**< Set by a private option. */
     111             :     int  write_header_trailer; /**< Set by a private option. */
     112             :     char *header_filename;  ///< filename to write the output header to
     113             : 
     114             :     int reset_timestamps;  ///< reset timestamps at the beginning of each segment
     115             :     int64_t initial_offset;    ///< initial timestamps offset, expressed in microseconds
     116             :     char *reference_stream_specifier; ///< reference stream specifier
     117             :     int   reference_stream_index;
     118             :     int   break_non_keyframes;
     119             :     int   write_empty;
     120             : 
     121             :     int use_rename;
     122             :     char temp_list_filename[1024];
     123             : 
     124             :     SegmentListEntry cur_entry;
     125             :     SegmentListEntry *segment_list_entries;
     126             :     SegmentListEntry *segment_list_entries_end;
     127             : } SegmentContext;
     128             : 
     129           0 : static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
     130             : {
     131           0 :     int needs_quoting = !!str[strcspn(str, "\",\n\r")];
     132             : 
     133           0 :     if (needs_quoting)
     134           0 :         avio_w8(ctx, '"');
     135             : 
     136           0 :     for (; *str; str++) {
     137           0 :         if (*str == '"')
     138           0 :             avio_w8(ctx, '"');
     139           0 :         avio_w8(ctx, *str);
     140             :     }
     141           0 :     if (needs_quoting)
     142           0 :         avio_w8(ctx, '"');
     143           0 : }
     144             : 
     145          13 : static int segment_mux_init(AVFormatContext *s)
     146             : {
     147          13 :     SegmentContext *seg = s->priv_data;
     148             :     AVFormatContext *oc;
     149             :     int i;
     150             :     int ret;
     151             : 
     152          13 :     ret = avformat_alloc_output_context2(&seg->avf, seg->oformat, NULL, NULL);
     153          13 :     if (ret < 0)
     154           0 :         return ret;
     155          13 :     oc = seg->avf;
     156             : 
     157          13 :     oc->interrupt_callback = s->interrupt_callback;
     158          13 :     oc->max_delay          = s->max_delay;
     159          13 :     av_dict_copy(&oc->metadata, s->metadata, 0);
     160          13 :     oc->opaque             = s->opaque;
     161          13 :     oc->io_close           = s->io_close;
     162          13 :     oc->io_open            = s->io_open;
     163          13 :     oc->flags              = s->flags;
     164             : 
     165          26 :     for (i = 0; i < s->nb_streams; i++) {
     166             :         AVStream *st;
     167             :         AVCodecParameters *ipar, *opar;
     168             : 
     169          13 :         if (!(st = avformat_new_stream(oc, NULL)))
     170           0 :             return AVERROR(ENOMEM);
     171          13 :         ipar = s->streams[i]->codecpar;
     172          13 :         opar = st->codecpar;
     173          13 :         avcodec_parameters_copy(opar, ipar);
     174          17 :         if (!oc->oformat->codec_tag ||
     175           8 :             av_codec_get_id (oc->oformat->codec_tag, ipar->codec_tag) == opar->codec_id ||
     176           4 :             av_codec_get_tag(oc->oformat->codec_tag, ipar->codec_id) <= 0) {
     177           9 :             opar->codec_tag = ipar->codec_tag;
     178             :         } else {
     179           4 :             opar->codec_tag = 0;
     180             :         }
     181          13 :         st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
     182          13 :         st->time_base = s->streams[i]->time_base;
     183          13 :         av_dict_copy(&st->metadata, s->streams[i]->metadata, 0);
     184             :     }
     185             : 
     186          13 :     return 0;
     187             : }
     188             : 
     189          15 : static int set_segment_filename(AVFormatContext *s)
     190             : {
     191          15 :     SegmentContext *seg = s->priv_data;
     192          15 :     AVFormatContext *oc = seg->avf;
     193             :     size_t size;
     194             :     int ret;
     195             : 
     196          15 :     if (seg->segment_idx_wrap)
     197           0 :         seg->segment_idx %= seg->segment_idx_wrap;
     198          15 :     if (seg->use_strftime) {
     199             :         time_t now0;
     200             :         struct tm *tm, tmpbuf;
     201           0 :         time(&now0);
     202           0 :         tm = localtime_r(&now0, &tmpbuf);
     203           0 :         if (!strftime(oc->filename, sizeof(oc->filename), s->filename, tm)) {
     204           0 :             av_log(oc, AV_LOG_ERROR, "Could not get segment filename with strftime\n");
     205           0 :             return AVERROR(EINVAL);
     206             :         }
     207          30 :     } else if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
     208          15 :                                      s->filename, seg->segment_idx) < 0) {
     209           0 :         av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->filename);
     210           0 :         return AVERROR(EINVAL);
     211             :     }
     212             : 
     213             :     /* copy modified name in list entry */
     214          15 :     size = strlen(av_basename(oc->filename)) + 1;
     215          15 :     if (seg->entry_prefix)
     216           0 :         size += strlen(seg->entry_prefix);
     217             : 
     218          15 :     if ((ret = av_reallocp(&seg->cur_entry.filename, size)) < 0)
     219           0 :         return ret;
     220          30 :     snprintf(seg->cur_entry.filename, size, "%s%s",
     221          15 :              seg->entry_prefix ? seg->entry_prefix : "",
     222          15 :              av_basename(oc->filename));
     223             : 
     224          15 :     return 0;
     225             : }
     226             : 
     227          10 : static int segment_start(AVFormatContext *s, int write_header)
     228             : {
     229          10 :     SegmentContext *seg = s->priv_data;
     230          10 :     AVFormatContext *oc = seg->avf;
     231          10 :     int err = 0;
     232             : 
     233          10 :     if (write_header) {
     234           8 :         avformat_free_context(oc);
     235           8 :         seg->avf = NULL;
     236           8 :         if ((err = segment_mux_init(s)) < 0)
     237           0 :             return err;
     238           8 :         oc = seg->avf;
     239             :     }
     240             : 
     241          10 :     seg->segment_idx++;
     242          10 :     if ((seg->segment_idx_wrap) && (seg->segment_idx % seg->segment_idx_wrap == 0))
     243           0 :         seg->segment_idx_wrap_nb++;
     244             : 
     245          10 :     if ((err = set_segment_filename(s)) < 0)
     246           0 :         return err;
     247             : 
     248          10 :     if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, NULL)) < 0) {
     249           0 :         av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->filename);
     250           0 :         return err;
     251             :     }
     252          10 :     if (!seg->individual_header_trailer)
     253           2 :         oc->pb->seekable = 0;
     254             : 
     255          10 :     if (oc->oformat->priv_class && oc->priv_data)
     256          10 :         av_opt_set(oc->priv_data, "mpegts_flags", "+resend_headers", 0);
     257             : 
     258          10 :     if (write_header) {
     259           8 :         AVDictionary *options = NULL;
     260           8 :         av_dict_copy(&options, seg->format_options, 0);
     261           8 :         av_dict_set(&options, "fflags", "-autobsf", 0);
     262           8 :         err = avformat_write_header(oc, &options);
     263           8 :         av_dict_free(&options);
     264           8 :         if (err < 0)
     265           0 :             return err;
     266             :     }
     267             : 
     268          10 :     seg->segment_frame_count = 0;
     269          10 :     return 0;
     270             : }
     271             : 
     272          12 : static int segment_list_open(AVFormatContext *s)
     273             : {
     274          12 :     SegmentContext *seg = s->priv_data;
     275             :     int ret;
     276             : 
     277          12 :     snprintf(seg->temp_list_filename, sizeof(seg->temp_list_filename), seg->use_rename ? "%s.tmp" : "%s", seg->list);
     278          12 :     ret = s->io_open(s, &seg->list_pb, seg->temp_list_filename, AVIO_FLAG_WRITE, NULL);
     279          12 :     if (ret < 0) {
     280           0 :         av_log(s, AV_LOG_ERROR, "Failed to open segment list '%s'\n", seg->list);
     281           0 :         return ret;
     282             :     }
     283             : 
     284          24 :     if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) {
     285             :         SegmentListEntry *entry;
     286          12 :         double max_duration = 0;
     287             : 
     288          12 :         avio_printf(seg->list_pb, "#EXTM3U\n");
     289          12 :         avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
     290          12 :         avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index);
     291          12 :         avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n",
     292          12 :                     seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO");
     293             : 
     294          12 :         av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%d\n",
     295          12 :                seg->segment_list_entries->index);
     296             : 
     297          39 :         for (entry = seg->segment_list_entries; entry; entry = entry->next)
     298          27 :             max_duration = FFMAX(max_duration, entry->end_time - entry->start_time);
     299          12 :         avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration));
     300           0 :     } else if (seg->list_type == LIST_TYPE_FFCONCAT) {
     301           0 :         avio_printf(seg->list_pb, "ffconcat version 1.0\n");
     302             :     }
     303             : 
     304          12 :     return ret;
     305             : }
     306             : 
     307          27 : static void segment_list_print_entry(AVIOContext      *list_ioctx,
     308             :                                      ListType          list_type,
     309             :                                      const SegmentListEntry *list_entry,
     310             :                                      void *log_ctx)
     311             : {
     312          27 :     switch (list_type) {
     313           0 :     case LIST_TYPE_FLAT:
     314           0 :         avio_printf(list_ioctx, "%s\n", list_entry->filename);
     315           0 :         break;
     316           0 :     case LIST_TYPE_CSV:
     317             :     case LIST_TYPE_EXT:
     318           0 :         print_csv_escaped_str(list_ioctx, list_entry->filename);
     319           0 :         avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time);
     320           0 :         break;
     321          27 :     case LIST_TYPE_M3U8:
     322          54 :         avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n",
     323          27 :                     list_entry->end_time - list_entry->start_time, list_entry->filename);
     324          27 :         break;
     325           0 :     case LIST_TYPE_FFCONCAT:
     326             :     {
     327             :         char *buf;
     328           0 :         if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) {
     329           0 :             av_log(log_ctx, AV_LOG_WARNING,
     330             :                    "Error writing list entry '%s' in list file\n", list_entry->filename);
     331           0 :             return;
     332             :         }
     333           0 :         avio_printf(list_ioctx, "file %s\n", buf);
     334           0 :         av_free(buf);
     335           0 :         break;
     336             :     }
     337           0 :     default:
     338           0 :         av_assert0(!"Invalid list type");
     339             :     }
     340             : }
     341             : 
     342          15 : static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
     343             : {
     344          15 :     SegmentContext *seg = s->priv_data;
     345          15 :     AVFormatContext *oc = seg->avf;
     346          15 :     int ret = 0;
     347             :     AVTimecode tc;
     348             :     AVRational rate;
     349             :     AVDictionaryEntry *tcr;
     350             :     char buf[AV_TIMECODE_STR_SIZE];
     351             :     int i;
     352             :     int err;
     353             : 
     354          15 :     if (!oc || !oc->pb)
     355           0 :         return AVERROR(EINVAL);
     356             : 
     357          15 :     av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */
     358          15 :     if (write_trailer)
     359          13 :         ret = av_write_trailer(oc);
     360             : 
     361          15 :     if (ret < 0)
     362           0 :         av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n",
     363           0 :                oc->filename);
     364             : 
     365          15 :     if (seg->list) {
     366          24 :         if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) {
     367          12 :             SegmentListEntry *entry = av_mallocz(sizeof(*entry));
     368          12 :             if (!entry) {
     369           0 :                 ret = AVERROR(ENOMEM);
     370           0 :                 goto end;
     371             :             }
     372             : 
     373             :             /* append new element */
     374          12 :             memcpy(entry, &seg->cur_entry, sizeof(*entry));
     375          12 :             entry->filename = av_strdup(entry->filename);
     376          12 :             if (!seg->segment_list_entries)
     377           4 :                 seg->segment_list_entries = seg->segment_list_entries_end = entry;
     378             :             else
     379           8 :                 seg->segment_list_entries_end->next = entry;
     380          12 :             seg->segment_list_entries_end = entry;
     381             : 
     382             :             /* drop first item */
     383          12 :             if (seg->list_size && seg->segment_count >= seg->list_size) {
     384           0 :                 entry = seg->segment_list_entries;
     385           0 :                 seg->segment_list_entries = seg->segment_list_entries->next;
     386           0 :                 av_freep(&entry->filename);
     387           0 :                 av_freep(&entry);
     388             :             }
     389             : 
     390          12 :             if ((ret = segment_list_open(s)) < 0)
     391           0 :                 goto end;
     392          39 :             for (entry = seg->segment_list_entries; entry; entry = entry->next)
     393          27 :                 segment_list_print_entry(seg->list_pb, seg->list_type, entry, s);
     394          12 :             if (seg->list_type == LIST_TYPE_M3U8 && is_last)
     395           4 :                 avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
     396          12 :             ff_format_io_close(s, &seg->list_pb);
     397          12 :             if (seg->use_rename)
     398          12 :                 ff_rename(seg->temp_list_filename, seg->list, s);
     399             :         } else {
     400           0 :             segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry, s);
     401           0 :             avio_flush(seg->list_pb);
     402             :         }
     403             :     }
     404             : 
     405          30 :     av_log(s, AV_LOG_VERBOSE, "segment:'%s' count:%d ended\n",
     406          15 :            seg->avf->filename, seg->segment_count);
     407          15 :     seg->segment_count++;
     408             : 
     409          15 :     if (seg->increment_tc) {
     410           0 :         tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
     411           0 :         if (tcr) {
     412             :             /* search the first video stream */
     413           0 :             for (i = 0; i < s->nb_streams; i++) {
     414           0 :                 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
     415           0 :                     rate = s->streams[i]->avg_frame_rate;/* Get fps from the video stream */
     416           0 :                     err = av_timecode_init_from_string(&tc, rate, tcr->value, s);
     417           0 :                     if (err < 0) {
     418           0 :                         av_log(s, AV_LOG_WARNING, "Could not increment timecode, error occurred during timecode creation.");
     419           0 :                         break;
     420             :                     }
     421           0 :                     tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(rate));/* increment timecode */
     422           0 :                     av_dict_set(&s->metadata, "timecode",
     423           0 :                                 av_timecode_make_string(&tc, buf, 0), 0);
     424           0 :                     break;
     425             :                 }
     426             :             }
     427             :         } else {
     428           0 :             av_log(s, AV_LOG_WARNING, "Could not increment timecode, no timecode metadata found");
     429             :         }
     430             :     }
     431             : 
     432          30 : end:
     433          15 :     ff_format_io_close(oc, &oc->pb);
     434             : 
     435          15 :     return ret;
     436             : }
     437             : 
     438           0 : static int parse_times(void *log_ctx, int64_t **times, int *nb_times,
     439             :                        const char *times_str)
     440             : {
     441             :     char *p;
     442           0 :     int i, ret = 0;
     443           0 :     char *times_str1 = av_strdup(times_str);
     444           0 :     char *saveptr = NULL;
     445             : 
     446           0 :     if (!times_str1)
     447           0 :         return AVERROR(ENOMEM);
     448             : 
     449             : #define FAIL(err) ret = err; goto end
     450             : 
     451           0 :     *nb_times = 1;
     452           0 :     for (p = times_str1; *p; p++)
     453           0 :         if (*p == ',')
     454           0 :             (*nb_times)++;
     455             : 
     456           0 :     *times = av_malloc_array(*nb_times, sizeof(**times));
     457           0 :     if (!*times) {
     458           0 :         av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n");
     459           0 :         FAIL(AVERROR(ENOMEM));
     460             :     }
     461             : 
     462           0 :     p = times_str1;
     463           0 :     for (i = 0; i < *nb_times; i++) {
     464             :         int64_t t;
     465           0 :         char *tstr = av_strtok(p, ",", &saveptr);
     466           0 :         p = NULL;
     467             : 
     468           0 :         if (!tstr || !tstr[0]) {
     469           0 :             av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n",
     470             :                    times_str);
     471           0 :             FAIL(AVERROR(EINVAL));
     472             :         }
     473             : 
     474           0 :         ret = av_parse_time(&t, tstr, 1);
     475           0 :         if (ret < 0) {
     476           0 :             av_log(log_ctx, AV_LOG_ERROR,
     477             :                    "Invalid time duration specification '%s' in times list %s\n", tstr, times_str);
     478           0 :             FAIL(AVERROR(EINVAL));
     479             :         }
     480           0 :         (*times)[i] = t;
     481             : 
     482             :         /* check on monotonicity */
     483           0 :         if (i && (*times)[i-1] > (*times)[i]) {
     484           0 :             av_log(log_ctx, AV_LOG_ERROR,
     485             :                    "Specified time %f is greater than the following time %f\n",
     486           0 :                    (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000);
     487           0 :             FAIL(AVERROR(EINVAL));
     488             :         }
     489             :     }
     490             : 
     491           0 : end:
     492           0 :     av_free(times_str1);
     493           0 :     return ret;
     494             : }
     495             : 
     496           0 : static int parse_frames(void *log_ctx, int **frames, int *nb_frames,
     497             :                         const char *frames_str)
     498             : {
     499             :     char *p;
     500           0 :     int i, ret = 0;
     501           0 :     char *frames_str1 = av_strdup(frames_str);
     502           0 :     char *saveptr = NULL;
     503             : 
     504           0 :     if (!frames_str1)
     505           0 :         return AVERROR(ENOMEM);
     506             : 
     507             : #define FAIL(err) ret = err; goto end
     508             : 
     509           0 :     *nb_frames = 1;
     510           0 :     for (p = frames_str1; *p; p++)
     511           0 :         if (*p == ',')
     512           0 :             (*nb_frames)++;
     513             : 
     514           0 :     *frames = av_malloc_array(*nb_frames, sizeof(**frames));
     515           0 :     if (!*frames) {
     516           0 :         av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n");
     517           0 :         FAIL(AVERROR(ENOMEM));
     518             :     }
     519             : 
     520           0 :     p = frames_str1;
     521           0 :     for (i = 0; i < *nb_frames; i++) {
     522             :         long int f;
     523             :         char *tailptr;
     524           0 :         char *fstr = av_strtok(p, ",", &saveptr);
     525             : 
     526           0 :         p = NULL;
     527           0 :         if (!fstr) {
     528           0 :             av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n",
     529             :                    frames_str);
     530           0 :             FAIL(AVERROR(EINVAL));
     531             :         }
     532           0 :         f = strtol(fstr, &tailptr, 10);
     533           0 :         if (*tailptr || f <= 0 || f >= INT_MAX) {
     534           0 :             av_log(log_ctx, AV_LOG_ERROR,
     535             :                    "Invalid argument '%s', must be a positive integer <= INT64_MAX\n",
     536             :                    fstr);
     537           0 :             FAIL(AVERROR(EINVAL));
     538             :         }
     539           0 :         (*frames)[i] = f;
     540             : 
     541             :         /* check on monotonicity */
     542           0 :         if (i && (*frames)[i-1] > (*frames)[i]) {
     543           0 :             av_log(log_ctx, AV_LOG_ERROR,
     544             :                    "Specified frame %d is greater than the following frame %d\n",
     545           0 :                    (*frames)[i], (*frames)[i-1]);
     546           0 :             FAIL(AVERROR(EINVAL));
     547             :         }
     548             :     }
     549             : 
     550           0 : end:
     551           0 :     av_free(frames_str1);
     552           0 :     return ret;
     553             : }
     554             : 
     555           0 : static int open_null_ctx(AVIOContext **ctx)
     556             : {
     557           0 :     int buf_size = 32768;
     558           0 :     uint8_t *buf = av_malloc(buf_size);
     559           0 :     if (!buf)
     560           0 :         return AVERROR(ENOMEM);
     561           0 :     *ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL);
     562           0 :     if (!*ctx) {
     563           0 :         av_free(buf);
     564           0 :         return AVERROR(ENOMEM);
     565             :     }
     566           0 :     return 0;
     567             : }
     568             : 
     569           0 : static void close_null_ctxp(AVIOContext **pb)
     570             : {
     571           0 :     av_freep(&(*pb)->buffer);
     572           0 :     avio_context_free(pb);
     573           0 : }
     574             : 
     575           5 : static int select_reference_stream(AVFormatContext *s)
     576             : {
     577           5 :     SegmentContext *seg = s->priv_data;
     578             :     int ret, i;
     579             : 
     580           5 :     seg->reference_stream_index = -1;
     581           5 :     if (!strcmp(seg->reference_stream_specifier, "auto")) {
     582             :         /* select first index of type with highest priority */
     583             :         int type_index_map[AVMEDIA_TYPE_NB];
     584             :         static const enum AVMediaType type_priority_list[] = {
     585             :             AVMEDIA_TYPE_VIDEO,
     586             :             AVMEDIA_TYPE_AUDIO,
     587             :             AVMEDIA_TYPE_SUBTITLE,
     588             :             AVMEDIA_TYPE_DATA,
     589             :             AVMEDIA_TYPE_ATTACHMENT
     590             :         };
     591             :         enum AVMediaType type;
     592             : 
     593          30 :         for (i = 0; i < AVMEDIA_TYPE_NB; i++)
     594          25 :             type_index_map[i] = -1;
     595             : 
     596             :         /* select first index for each type */
     597          10 :         for (i = 0; i < s->nb_streams; i++) {
     598           5 :             type = s->streams[i]->codecpar->codec_type;
     599           5 :             if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1
     600             :                 /* ignore attached pictures/cover art streams */
     601           5 :                 && !(s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC))
     602           5 :                 type_index_map[type] = i;
     603             :         }
     604             : 
     605           9 :         for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
     606           9 :             type = type_priority_list[i];
     607           9 :             if ((seg->reference_stream_index = type_index_map[type]) >= 0)
     608           5 :                 break;
     609             :         }
     610             :     } else {
     611           0 :         for (i = 0; i < s->nb_streams; i++) {
     612           0 :             ret = avformat_match_stream_specifier(s, s->streams[i],
     613           0 :                                                   seg->reference_stream_specifier);
     614           0 :             if (ret < 0)
     615           0 :                 return ret;
     616           0 :             if (ret > 0) {
     617           0 :                 seg->reference_stream_index = i;
     618           0 :                 break;
     619             :             }
     620             :         }
     621             :     }
     622             : 
     623           5 :     if (seg->reference_stream_index < 0) {
     624           0 :         av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
     625             :                seg->reference_stream_specifier);
     626           0 :         return AVERROR(EINVAL);
     627             :     }
     628             : 
     629           5 :     return 0;
     630             : }
     631             : 
     632           5 : static void seg_free(AVFormatContext *s)
     633             : {
     634           5 :     SegmentContext *seg = s->priv_data;
     635           5 :     ff_format_io_close(seg->avf, &seg->list_pb);
     636           5 :     avformat_free_context(seg->avf);
     637           5 :     seg->avf = NULL;
     638           5 : }
     639             : 
     640           5 : static int seg_init(AVFormatContext *s)
     641             : {
     642           5 :     SegmentContext *seg = s->priv_data;
     643           5 :     AVFormatContext *oc = seg->avf;
     644           5 :     AVDictionary *options = NULL;
     645             :     int ret;
     646             :     int i;
     647             : 
     648           5 :     seg->segment_count = 0;
     649           5 :     if (!seg->write_header_trailer)
     650           0 :         seg->individual_header_trailer = 0;
     651             : 
     652           5 :     if (seg->header_filename) {
     653           1 :         seg->write_header_trailer = 1;
     654           1 :         seg->individual_header_trailer = 0;
     655             :     }
     656             : 
     657           5 :     if (seg->initial_offset > 0) {
     658           0 :         av_log(s, AV_LOG_WARNING, "NOTE: the option initial_offset is deprecated,"
     659             :                "you can use output_ts_offset instead of it\n");
     660             :     }
     661             : 
     662           5 :     if (!!seg->time_str + !!seg->times_str + !!seg->frames_str > 1) {
     663           0 :         av_log(s, AV_LOG_ERROR,
     664             :                "segment_time, segment_times, and segment_frames options "
     665             :                "are mutually exclusive, select just one of them\n");
     666           0 :         return AVERROR(EINVAL);
     667             :     }
     668             : 
     669           5 :     if (seg->times_str) {
     670           0 :         if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
     671           0 :             return ret;
     672           5 :     } else if (seg->frames_str) {
     673           0 :         if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0)
     674           0 :             return ret;
     675             :     } else {
     676             :         /* set default value if not specified */
     677           5 :         if (!seg->time_str)
     678           0 :             seg->time_str = av_strdup("2");
     679           5 :         if ((ret = av_parse_time(&seg->time, seg->time_str, 1)) < 0) {
     680           0 :             av_log(s, AV_LOG_ERROR,
     681             :                    "Invalid time duration specification '%s' for segment_time option\n",
     682             :                    seg->time_str);
     683           0 :             return ret;
     684             :         }
     685           5 :         if (seg->use_clocktime) {
     686           0 :             if (seg->time <= 0) {
     687           0 :                 av_log(s, AV_LOG_ERROR, "Invalid negative segment_time with segment_atclocktime option set\n");
     688           0 :                 return AVERROR(EINVAL);
     689             :             }
     690           0 :             seg->clocktime_offset = seg->time - (seg->clocktime_offset % seg->time);
     691             :         }
     692             :     }
     693             : 
     694           5 :     if (seg->format_options_str) {
     695           2 :         ret = av_dict_parse_string(&seg->format_options, seg->format_options_str, "=", ":", 0);
     696           2 :         if (ret < 0) {
     697           0 :             av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n",
     698             :                    seg->format_options_str);
     699           0 :             return ret;
     700             :         }
     701             :     }
     702             : 
     703           5 :     if (seg->list) {
     704           4 :         if (seg->list_type == LIST_TYPE_UNDEFINED) {
     705           4 :             if      (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV;
     706           4 :             else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT;
     707           4 :             else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8;
     708           0 :             else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT;
     709           0 :             else                                      seg->list_type = LIST_TYPE_FLAT;
     710             :         }
     711           4 :         if (!seg->list_size && seg->list_type != LIST_TYPE_M3U8) {
     712           0 :             if ((ret = segment_list_open(s)) < 0)
     713           0 :                 return ret;
     714             :         } else {
     715           4 :             const char *proto = avio_find_protocol_name(seg->list);
     716           4 :             seg->use_rename = proto && !strcmp(proto, "file");
     717             :         }
     718             :     }
     719             : 
     720           5 :     if (seg->list_type == LIST_TYPE_EXT)
     721           0 :         av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
     722             : 
     723           5 :     if ((ret = select_reference_stream(s)) < 0)
     724           0 :         return ret;
     725           5 :     av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n",
     726             :            seg->reference_stream_index,
     727           5 :            av_get_media_type_string(s->streams[seg->reference_stream_index]->codecpar->codec_type));
     728             : 
     729           5 :     seg->oformat = av_guess_format(seg->format, s->filename, NULL);
     730             : 
     731           5 :     if (!seg->oformat)
     732           0 :         return AVERROR_MUXER_NOT_FOUND;
     733           5 :     if (seg->oformat->flags & AVFMT_NOFILE) {
     734           0 :         av_log(s, AV_LOG_ERROR, "format %s not supported.\n",
     735           0 :                seg->oformat->name);
     736           0 :         return AVERROR(EINVAL);
     737             :     }
     738             : 
     739           5 :     if ((ret = segment_mux_init(s)) < 0)
     740           0 :         return ret;
     741             : 
     742           5 :     if ((ret = set_segment_filename(s)) < 0)
     743           0 :         return ret;
     744           5 :     oc = seg->avf;
     745             : 
     746           5 :     if (seg->write_header_trailer) {
     747          10 :         if ((ret = s->io_open(s, &oc->pb,
     748           5 :                               seg->header_filename ? seg->header_filename : oc->filename,
     749             :                               AVIO_FLAG_WRITE, NULL)) < 0) {
     750           0 :             av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->filename);
     751           0 :             return ret;
     752             :         }
     753           5 :         if (!seg->individual_header_trailer)
     754           1 :             oc->pb->seekable = 0;
     755             :     } else {
     756           0 :         if ((ret = open_null_ctx(&oc->pb)) < 0)
     757           0 :             return ret;
     758             :     }
     759             : 
     760           5 :     av_dict_copy(&options, seg->format_options, 0);
     761           5 :     av_dict_set(&options, "fflags", "-autobsf", 0);
     762           5 :     ret = avformat_init_output(oc, &options);
     763           5 :     if (av_dict_count(options)) {
     764           0 :         av_log(s, AV_LOG_ERROR,
     765             :                "Some of the provided format options in '%s' are not recognized\n", seg->format_options_str);
     766           0 :         av_dict_free(&options);
     767           0 :         return AVERROR(EINVAL);
     768             :     }
     769           5 :     av_dict_free(&options);
     770             : 
     771           5 :     if (ret < 0) {
     772           0 :         ff_format_io_close(oc, &oc->pb);
     773           0 :         return ret;
     774             :     }
     775           5 :     seg->segment_frame_count = 0;
     776             : 
     777           5 :     av_assert0(s->nb_streams == oc->nb_streams);
     778           5 :     if (ret == AVSTREAM_INIT_IN_WRITE_HEADER) {
     779           0 :         ret = avformat_write_header(oc, NULL);
     780           0 :         if (ret < 0)
     781           0 :             return ret;
     782           0 :         seg->header_written = 1;
     783             :     }
     784             : 
     785          10 :     for (i = 0; i < s->nb_streams; i++) {
     786           5 :         AVStream *inner_st  = oc->streams[i];
     787           5 :         AVStream *outer_st = s->streams[i];
     788           5 :         avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
     789             :     }
     790             : 
     791           5 :     if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0)
     792           5 :         s->avoid_negative_ts = 1;
     793             : 
     794           5 :     return ret;
     795             : }
     796             : 
     797           5 : static int seg_write_header(AVFormatContext *s)
     798             : {
     799           5 :     SegmentContext *seg = s->priv_data;
     800           5 :     AVFormatContext *oc = seg->avf;
     801             :     int ret, i;
     802             : 
     803           5 :     if (!seg->header_written) {
     804          10 :         for (i = 0; i < s->nb_streams; i++) {
     805           5 :             AVStream *st = oc->streams[i];
     806             :             AVCodecParameters *ipar, *opar;
     807             : 
     808           5 :             ipar = s->streams[i]->codecpar;
     809           5 :             opar = oc->streams[i]->codecpar;
     810           5 :             avcodec_parameters_copy(opar, ipar);
     811           7 :             if (!oc->oformat->codec_tag ||
     812           4 :                 av_codec_get_id (oc->oformat->codec_tag, ipar->codec_tag) == opar->codec_id ||
     813           2 :                 av_codec_get_tag(oc->oformat->codec_tag, ipar->codec_id) <= 0) {
     814           3 :                 opar->codec_tag = ipar->codec_tag;
     815             :             } else {
     816           2 :                 opar->codec_tag = 0;
     817             :             }
     818           5 :             st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
     819           5 :             st->time_base = s->streams[i]->time_base;
     820             :         }
     821           5 :         ret = avformat_write_header(oc, NULL);
     822           5 :         if (ret < 0)
     823           0 :             return ret;
     824             :     }
     825             : 
     826           5 :     if (!seg->write_header_trailer || seg->header_filename) {
     827           1 :         if (seg->header_filename) {
     828           1 :             av_write_frame(oc, NULL);
     829           1 :             ff_format_io_close(oc, &oc->pb);
     830             :         } else {
     831           0 :             close_null_ctxp(&oc->pb);
     832             :         }
     833           1 :         if ((ret = oc->io_open(oc, &oc->pb, oc->filename, AVIO_FLAG_WRITE, NULL)) < 0)
     834           0 :             return ret;
     835           1 :         if (!seg->individual_header_trailer)
     836           1 :             oc->pb->seekable = 0;
     837             :     }
     838             : 
     839           5 :     return 0;
     840             : }
     841             : 
     842        1726 : static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
     843             : {
     844        1726 :     SegmentContext *seg = s->priv_data;
     845        1726 :     AVStream *st = s->streams[pkt->stream_index];
     846        1726 :     int64_t end_pts = INT64_MAX, offset;
     847        1726 :     int start_frame = INT_MAX;
     848             :     int ret;
     849             :     struct tm ti;
     850             :     int64_t usecs;
     851             :     int64_t wrapped_val;
     852             : 
     853        1726 :     if (!seg->avf || !seg->avf->pb)
     854           0 :         return AVERROR(EINVAL);
     855             : 
     856        1726 : calc_times:
     857        1726 :     if (seg->times) {
     858           0 :         end_pts = seg->segment_count < seg->nb_times ?
     859           0 :             seg->times[seg->segment_count] : INT64_MAX;
     860        1726 :     } else if (seg->frames) {
     861           0 :         start_frame = seg->segment_count < seg->nb_frames ?
     862           0 :             seg->frames[seg->segment_count] : INT_MAX;
     863             :     } else {
     864        1726 :         if (seg->use_clocktime) {
     865           0 :             int64_t avgt = av_gettime();
     866           0 :             time_t sec = avgt / 1000000;
     867           0 :             localtime_r(&sec, &ti);
     868           0 :             usecs = (int64_t)(ti.tm_hour * 3600 + ti.tm_min * 60 + ti.tm_sec) * 1000000 + (avgt % 1000000);
     869           0 :             wrapped_val = (usecs + seg->clocktime_offset) % seg->time;
     870           0 :             if (wrapped_val < seg->last_val && wrapped_val < seg->clocktime_wrap_duration)
     871           0 :                 seg->cut_pending = 1;
     872           0 :             seg->last_val = wrapped_val;
     873             :         } else {
     874        1726 :             end_pts = seg->time * (seg->segment_count + 1);
     875             :         }
     876             :     }
     877             : 
     878             :     ff_dlog(s, "packet stream:%d pts:%s pts_time:%s duration_time:%s is_key:%d frame:%d\n",
     879             :             pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
     880             :             av_ts2timestr(pkt->duration, &st->time_base),
     881             :             pkt->flags & AV_PKT_FLAG_KEY,
     882             :             pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1);
     883             : 
     884        3452 :     if (pkt->stream_index == seg->reference_stream_index &&
     885        3452 :         (pkt->flags & AV_PKT_FLAG_KEY || seg->break_non_keyframes) &&
     886        3212 :         (seg->segment_frame_count > 0 || seg->write_empty) &&
     887        4803 :         (seg->cut_pending || seg->frame_count >= start_frame ||
     888        3202 :          (pkt->pts != AV_NOPTS_VALUE &&
     889        1601 :           av_compare_ts(pkt->pts, st->time_base,
     890        1601 :                         end_pts - seg->time_delta, AV_TIME_BASE_Q) >= 0))) {
     891             :         /* sanitize end time in case last packet didn't have a defined duration */
     892          10 :         if (seg->cur_entry.last_duration == 0)
     893           0 :             seg->cur_entry.end_time = (double)pkt->pts * av_q2d(st->time_base);
     894             : 
     895          10 :         if ((ret = segment_end(s, seg->individual_header_trailer, 0)) < 0)
     896           0 :             goto fail;
     897             : 
     898          10 :         if ((ret = segment_start(s, seg->individual_header_trailer)) < 0)
     899           0 :             goto fail;
     900             : 
     901          10 :         seg->cut_pending = 0;
     902          10 :         seg->cur_entry.index = seg->segment_idx + seg->segment_idx_wrap * seg->segment_idx_wrap_nb;
     903          10 :         seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);
     904          10 :         seg->cur_entry.start_pts = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q);
     905          10 :         seg->cur_entry.end_time = seg->cur_entry.start_time;
     906             : 
     907          20 :         if (seg->times || (!seg->frames && !seg->use_clocktime) && seg->write_empty)
     908             :             goto calc_times;
     909             :     }
     910             : 
     911        1726 :     if (pkt->stream_index == seg->reference_stream_index) {
     912        1726 :         if (pkt->pts != AV_NOPTS_VALUE)
     913        1726 :             seg->cur_entry.end_time =
     914        1726 :                 FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
     915        1726 :         seg->cur_entry.last_duration = pkt->duration;
     916             :     }
     917             : 
     918        1726 :     if (seg->segment_frame_count == 0) {
     919          60 :         av_log(s, AV_LOG_VERBOSE, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n",
     920          15 :                seg->avf->filename, pkt->stream_index,
     921          30 :                av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), seg->frame_count);
     922             :     }
     923             : 
     924       12082 :     av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s",
     925             :            pkt->stream_index,
     926        3452 :            av_ts2timestr(seg->cur_entry.start_pts, &AV_TIME_BASE_Q),
     927        3452 :            av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
     928        3452 :            av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
     929             : 
     930             :     /* compute new timestamps */
     931        1726 :     offset = av_rescale_q(seg->initial_offset - (seg->reset_timestamps ? seg->cur_entry.start_pts : 0),
     932        1726 :                           AV_TIME_BASE_Q, st->time_base);
     933        1726 :     if (pkt->pts != AV_NOPTS_VALUE)
     934        1726 :         pkt->pts += offset;
     935        1726 :     if (pkt->dts != AV_NOPTS_VALUE)
     936        1726 :         pkt->dts += offset;
     937             : 
     938        8630 :     av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
     939        3452 :            av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
     940        3452 :            av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
     941             : 
     942        1726 :     ret = ff_write_chained(seg->avf, pkt->stream_index, pkt, s, seg->initial_offset || seg->reset_timestamps);
     943             : 
     944        1726 : fail:
     945        1726 :     if (pkt->stream_index == seg->reference_stream_index) {
     946        1726 :         seg->frame_count++;
     947        1726 :         seg->segment_frame_count++;
     948             :     }
     949             : 
     950        1726 :     return ret;
     951             : }
     952             : 
     953           5 : static int seg_write_trailer(struct AVFormatContext *s)
     954             : {
     955           5 :     SegmentContext *seg = s->priv_data;
     956           5 :     AVFormatContext *oc = seg->avf;
     957             :     SegmentListEntry *cur, *next;
     958           5 :     int ret = 0;
     959             : 
     960           5 :     if (!oc)
     961           0 :         goto fail;
     962             : 
     963           5 :     if (!seg->write_header_trailer) {
     964           0 :         if ((ret = segment_end(s, 0, 1)) < 0)
     965           0 :             goto fail;
     966           0 :         if ((ret = open_null_ctx(&oc->pb)) < 0)
     967           0 :             goto fail;
     968           0 :         ret = av_write_trailer(oc);
     969           0 :         close_null_ctxp(&oc->pb);
     970             :     } else {
     971           5 :         ret = segment_end(s, 1, 1);
     972             :     }
     973           5 : fail:
     974           5 :     if (seg->list)
     975           4 :         ff_format_io_close(s, &seg->list_pb);
     976             : 
     977           5 :     av_dict_free(&seg->format_options);
     978           5 :     av_opt_free(seg);
     979           5 :     av_freep(&seg->times);
     980           5 :     av_freep(&seg->frames);
     981           5 :     av_freep(&seg->cur_entry.filename);
     982             : 
     983           5 :     cur = seg->segment_list_entries;
     984          22 :     while (cur) {
     985          12 :         next = cur->next;
     986          12 :         av_freep(&cur->filename);
     987          12 :         av_free(cur);
     988          12 :         cur = next;
     989             :     }
     990             : 
     991           5 :     avformat_free_context(oc);
     992           5 :     seg->avf = NULL;
     993           5 :     return ret;
     994             : }
     995             : 
     996           5 : static int seg_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
     997             : {
     998           5 :     SegmentContext *seg = s->priv_data;
     999           5 :     AVFormatContext *oc = seg->avf;
    1000           5 :     if (oc->oformat->check_bitstream) {
    1001           5 :         int ret = oc->oformat->check_bitstream(oc, pkt);
    1002           5 :         if (ret == 1) {
    1003           5 :             AVStream *st = s->streams[pkt->stream_index];
    1004           5 :             AVStream *ost = oc->streams[pkt->stream_index];
    1005           5 :             st->internal->bsfcs = ost->internal->bsfcs;
    1006           5 :             st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
    1007           5 :             ost->internal->bsfcs = NULL;
    1008           5 :             ost->internal->nb_bsfcs = 0;
    1009             :         }
    1010           5 :         return ret;
    1011             :     }
    1012           0 :     return 1;
    1013             : }
    1014             : 
    1015             : #define OFFSET(x) offsetof(SegmentContext, x)
    1016             : #define E AV_OPT_FLAG_ENCODING_PARAM
    1017             : static const AVOption options[] = {
    1018             :     { "reference_stream",  "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, CHAR_MIN, CHAR_MAX, E },
    1019             :     { "segment_format",    "set container format used for the segments", OFFSET(format),  AV_OPT_TYPE_STRING, {.str = NULL},  0, 0,       E },
    1020             :     { "segment_format_options", "set list of options for the container format used for the segments", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
    1021             :     { "segment_list",      "set the segment list filename",              OFFSET(list),    AV_OPT_TYPE_STRING, {.str = NULL},  0, 0,       E },
    1022             :     { "segment_header_filename", "write a single file containing the header", OFFSET(header_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
    1023             : 
    1024             :     { "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"},
    1025             :     { "cache",             "allow list caching",                                    0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX,   E, "list_flags"},
    1026             :     { "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"},
    1027             : 
    1028             :     { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT,  {.i64 = 0},     0, INT_MAX, E },
    1029             : 
    1030             :     { "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" },
    1031             :     { "flat", "flat format",     0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, "list_type" },
    1032             :     { "csv",  "csv format",      0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV  }, INT_MIN, INT_MAX, E, "list_type" },
    1033             :     { "ext",  "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT  }, INT_MIN, INT_MAX, E, "list_type" },
    1034             :     { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, "list_type" },
    1035             :     { "m3u8", "M3U8 format",     0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
    1036             :     { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
    1037             : 
    1038             :     { "segment_atclocktime",      "set segment to be cut at clocktime",  OFFSET(use_clocktime), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E},
    1039             :     { "segment_clocktime_offset", "set segment clocktime offset",        OFFSET(clocktime_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 86400000000LL, E},
    1040             :     { "segment_clocktime_wrap_duration", "set segment clocktime wrapping duration", OFFSET(clocktime_wrap_duration), AV_OPT_TYPE_DURATION, {.i64 = INT64_MAX}, 0, INT64_MAX, E},
    1041             :     { "segment_time",      "set segment duration",                       OFFSET(time_str),AV_OPT_TYPE_STRING, {.str = NULL},  0, 0,       E },
    1042             :     { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 0, E },
    1043             :     { "segment_times",     "set segment split time points",              OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL},  0, 0,       E },
    1044             :     { "segment_frames",    "set segment split frame numbers",            OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL},  0, 0,       E },
    1045             :     { "segment_wrap",      "set number after which the index wraps",     OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
    1046             :     { "segment_list_entry_prefix", "set base url prefix for segments", OFFSET(entry_prefix), AV_OPT_TYPE_STRING,  {.str = NULL}, 0, 0, E },
    1047             :     { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
    1048             :     { "segment_wrap_number", "set the number of wrap before the first segment", OFFSET(segment_idx_wrap_nb), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
    1049             :     { "strftime",          "set filename expansion with strftime at segment creation", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
    1050             :     { "increment_tc", "increment timecode between each segment", OFFSET(increment_tc), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
    1051             :     { "break_non_keyframes", "allow breaking segments on non-keyframes", OFFSET(break_non_keyframes), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
    1052             : 
    1053             :     { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },
    1054             :     { "write_header_trailer", "write a header to the first segment and a trailer to the last one", OFFSET(write_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },
    1055             :     { "reset_timestamps", "reset timestamps at the beginning of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
    1056             :     { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E },
    1057             :     { "write_empty_segments", "allow writing empty 'filler' segments", OFFSET(write_empty), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
    1058             :     { NULL },
    1059             : };
    1060             : 
    1061             : static const AVClass seg_class = {
    1062             :     .class_name = "segment muxer",
    1063             :     .item_name  = av_default_item_name,
    1064             :     .option     = options,
    1065             :     .version    = LIBAVUTIL_VERSION_INT,
    1066             : };
    1067             : 
    1068             : AVOutputFormat ff_segment_muxer = {
    1069             :     .name           = "segment",
    1070             :     .long_name      = NULL_IF_CONFIG_SMALL("segment"),
    1071             :     .priv_data_size = sizeof(SegmentContext),
    1072             :     .flags          = AVFMT_NOFILE|AVFMT_GLOBALHEADER,
    1073             :     .init           = seg_init,
    1074             :     .write_header   = seg_write_header,
    1075             :     .write_packet   = seg_write_packet,
    1076             :     .write_trailer  = seg_write_trailer,
    1077             :     .deinit         = seg_free,
    1078             :     .check_bitstream = seg_check_bitstream,
    1079             :     .priv_class     = &seg_class,
    1080             : };
    1081             : 
    1082             : static const AVClass sseg_class = {
    1083             :     .class_name = "stream_segment muxer",
    1084             :     .item_name  = av_default_item_name,
    1085             :     .option     = options,
    1086             :     .version    = LIBAVUTIL_VERSION_INT,
    1087             : };
    1088             : 
    1089             : AVOutputFormat ff_stream_segment_muxer = {
    1090             :     .name           = "stream_segment,ssegment",
    1091             :     .long_name      = NULL_IF_CONFIG_SMALL("streaming segment muxer"),
    1092             :     .priv_data_size = sizeof(SegmentContext),
    1093             :     .flags          = AVFMT_NOFILE,
    1094             :     .init           = seg_init,
    1095             :     .write_header   = seg_write_header,
    1096             :     .write_packet   = seg_write_packet,
    1097             :     .write_trailer  = seg_write_trailer,
    1098             :     .deinit         = seg_free,
    1099             :     .check_bitstream = seg_check_bitstream,
    1100             :     .priv_class     = &sseg_class,
    1101             : };

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