LCOV - code coverage report
Current view: top level - libavformat - segment.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 327 561 58.3 %
Date: 2018-05-20 11:54:08 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             :     char buf[1024];
     196             :     char *new_name;
     197             : 
     198          15 :     if (seg->segment_idx_wrap)
     199           0 :         seg->segment_idx %= seg->segment_idx_wrap;
     200          15 :     if (seg->use_strftime) {
     201             :         time_t now0;
     202             :         struct tm *tm, tmpbuf;
     203           0 :         time(&now0);
     204           0 :         tm = localtime_r(&now0, &tmpbuf);
     205           0 :         if (!strftime(buf, sizeof(buf), s->url, tm)) {
     206           0 :             av_log(oc, AV_LOG_ERROR, "Could not get segment filename with strftime\n");
     207           0 :             return AVERROR(EINVAL);
     208             :         }
     209          30 :     } else if (av_get_frame_filename(buf, sizeof(buf),
     210          15 :                                      s->url, seg->segment_idx) < 0) {
     211           0 :         av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->url);
     212           0 :         return AVERROR(EINVAL);
     213             :     }
     214          15 :     new_name = av_strdup(buf);
     215          15 :     if (!new_name)
     216           0 :         return AVERROR(ENOMEM);
     217          15 :     ff_format_set_url(oc, new_name);
     218             : 
     219             :     /* copy modified name in list entry */
     220          15 :     size = strlen(av_basename(oc->url)) + 1;
     221          15 :     if (seg->entry_prefix)
     222           0 :         size += strlen(seg->entry_prefix);
     223             : 
     224          15 :     if ((ret = av_reallocp(&seg->cur_entry.filename, size)) < 0)
     225           0 :         return ret;
     226          30 :     snprintf(seg->cur_entry.filename, size, "%s%s",
     227          15 :              seg->entry_prefix ? seg->entry_prefix : "",
     228          15 :              av_basename(oc->url));
     229             : 
     230          15 :     return 0;
     231             : }
     232             : 
     233          10 : static int segment_start(AVFormatContext *s, int write_header)
     234             : {
     235          10 :     SegmentContext *seg = s->priv_data;
     236          10 :     AVFormatContext *oc = seg->avf;
     237          10 :     int err = 0;
     238             : 
     239          10 :     if (write_header) {
     240           8 :         avformat_free_context(oc);
     241           8 :         seg->avf = NULL;
     242           8 :         if ((err = segment_mux_init(s)) < 0)
     243           0 :             return err;
     244           8 :         oc = seg->avf;
     245             :     }
     246             : 
     247          10 :     seg->segment_idx++;
     248          10 :     if ((seg->segment_idx_wrap) && (seg->segment_idx % seg->segment_idx_wrap == 0))
     249           0 :         seg->segment_idx_wrap_nb++;
     250             : 
     251          10 :     if ((err = set_segment_filename(s)) < 0)
     252           0 :         return err;
     253             : 
     254          10 :     if ((err = s->io_open(s, &oc->pb, oc->url, AVIO_FLAG_WRITE, NULL)) < 0) {
     255           0 :         av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->url);
     256           0 :         return err;
     257             :     }
     258          10 :     if (!seg->individual_header_trailer)
     259           2 :         oc->pb->seekable = 0;
     260             : 
     261          10 :     if (oc->oformat->priv_class && oc->priv_data)
     262          10 :         av_opt_set(oc->priv_data, "mpegts_flags", "+resend_headers", 0);
     263             : 
     264          10 :     if (write_header) {
     265           8 :         AVDictionary *options = NULL;
     266           8 :         av_dict_copy(&options, seg->format_options, 0);
     267           8 :         av_dict_set(&options, "fflags", "-autobsf", 0);
     268           8 :         err = avformat_write_header(oc, &options);
     269           8 :         av_dict_free(&options);
     270           8 :         if (err < 0)
     271           0 :             return err;
     272             :     }
     273             : 
     274          10 :     seg->segment_frame_count = 0;
     275          10 :     return 0;
     276             : }
     277             : 
     278          12 : static int segment_list_open(AVFormatContext *s)
     279             : {
     280          12 :     SegmentContext *seg = s->priv_data;
     281             :     int ret;
     282             : 
     283          12 :     snprintf(seg->temp_list_filename, sizeof(seg->temp_list_filename), seg->use_rename ? "%s.tmp" : "%s", seg->list);
     284          12 :     ret = s->io_open(s, &seg->list_pb, seg->temp_list_filename, AVIO_FLAG_WRITE, NULL);
     285          12 :     if (ret < 0) {
     286           0 :         av_log(s, AV_LOG_ERROR, "Failed to open segment list '%s'\n", seg->list);
     287           0 :         return ret;
     288             :     }
     289             : 
     290          24 :     if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) {
     291             :         SegmentListEntry *entry;
     292          12 :         double max_duration = 0;
     293             : 
     294          12 :         avio_printf(seg->list_pb, "#EXTM3U\n");
     295          12 :         avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
     296          12 :         avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index);
     297          12 :         avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n",
     298          12 :                     seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO");
     299             : 
     300          12 :         av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%d\n",
     301          12 :                seg->segment_list_entries->index);
     302             : 
     303          39 :         for (entry = seg->segment_list_entries; entry; entry = entry->next)
     304          27 :             max_duration = FFMAX(max_duration, entry->end_time - entry->start_time);
     305          12 :         avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration));
     306           0 :     } else if (seg->list_type == LIST_TYPE_FFCONCAT) {
     307           0 :         avio_printf(seg->list_pb, "ffconcat version 1.0\n");
     308             :     }
     309             : 
     310          12 :     return ret;
     311             : }
     312             : 
     313          27 : static void segment_list_print_entry(AVIOContext      *list_ioctx,
     314             :                                      ListType          list_type,
     315             :                                      const SegmentListEntry *list_entry,
     316             :                                      void *log_ctx)
     317             : {
     318          27 :     switch (list_type) {
     319           0 :     case LIST_TYPE_FLAT:
     320           0 :         avio_printf(list_ioctx, "%s\n", list_entry->filename);
     321           0 :         break;
     322           0 :     case LIST_TYPE_CSV:
     323             :     case LIST_TYPE_EXT:
     324           0 :         print_csv_escaped_str(list_ioctx, list_entry->filename);
     325           0 :         avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time);
     326           0 :         break;
     327          27 :     case LIST_TYPE_M3U8:
     328          54 :         avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n",
     329          27 :                     list_entry->end_time - list_entry->start_time, list_entry->filename);
     330          27 :         break;
     331           0 :     case LIST_TYPE_FFCONCAT:
     332             :     {
     333             :         char *buf;
     334           0 :         if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) {
     335           0 :             av_log(log_ctx, AV_LOG_WARNING,
     336             :                    "Error writing list entry '%s' in list file\n", list_entry->filename);
     337           0 :             return;
     338             :         }
     339           0 :         avio_printf(list_ioctx, "file %s\n", buf);
     340           0 :         av_free(buf);
     341           0 :         break;
     342             :     }
     343           0 :     default:
     344           0 :         av_assert0(!"Invalid list type");
     345             :     }
     346             : }
     347             : 
     348          15 : static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
     349             : {
     350          15 :     SegmentContext *seg = s->priv_data;
     351          15 :     AVFormatContext *oc = seg->avf;
     352          15 :     int ret = 0;
     353             :     AVTimecode tc;
     354             :     AVRational rate;
     355             :     AVDictionaryEntry *tcr;
     356             :     char buf[AV_TIMECODE_STR_SIZE];
     357             :     int i;
     358             :     int err;
     359             : 
     360          15 :     if (!oc || !oc->pb)
     361           0 :         return AVERROR(EINVAL);
     362             : 
     363          15 :     av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */
     364          15 :     if (write_trailer)
     365          13 :         ret = av_write_trailer(oc);
     366             : 
     367          15 :     if (ret < 0)
     368           0 :         av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n",
     369             :                oc->url);
     370             : 
     371          15 :     if (seg->list) {
     372          24 :         if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) {
     373          12 :             SegmentListEntry *entry = av_mallocz(sizeof(*entry));
     374          12 :             if (!entry) {
     375           0 :                 ret = AVERROR(ENOMEM);
     376           0 :                 goto end;
     377             :             }
     378             : 
     379             :             /* append new element */
     380          12 :             memcpy(entry, &seg->cur_entry, sizeof(*entry));
     381          12 :             entry->filename = av_strdup(entry->filename);
     382          12 :             if (!seg->segment_list_entries)
     383           4 :                 seg->segment_list_entries = seg->segment_list_entries_end = entry;
     384             :             else
     385           8 :                 seg->segment_list_entries_end->next = entry;
     386          12 :             seg->segment_list_entries_end = entry;
     387             : 
     388             :             /* drop first item */
     389          12 :             if (seg->list_size && seg->segment_count >= seg->list_size) {
     390           0 :                 entry = seg->segment_list_entries;
     391           0 :                 seg->segment_list_entries = seg->segment_list_entries->next;
     392           0 :                 av_freep(&entry->filename);
     393           0 :                 av_freep(&entry);
     394             :             }
     395             : 
     396          12 :             if ((ret = segment_list_open(s)) < 0)
     397           0 :                 goto end;
     398          39 :             for (entry = seg->segment_list_entries; entry; entry = entry->next)
     399          27 :                 segment_list_print_entry(seg->list_pb, seg->list_type, entry, s);
     400          12 :             if (seg->list_type == LIST_TYPE_M3U8 && is_last)
     401           4 :                 avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
     402          12 :             ff_format_io_close(s, &seg->list_pb);
     403          12 :             if (seg->use_rename)
     404          12 :                 ff_rename(seg->temp_list_filename, seg->list, s);
     405             :         } else {
     406           0 :             segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry, s);
     407           0 :             avio_flush(seg->list_pb);
     408             :         }
     409             :     }
     410             : 
     411          30 :     av_log(s, AV_LOG_VERBOSE, "segment:'%s' count:%d ended\n",
     412          15 :            seg->avf->url, seg->segment_count);
     413          15 :     seg->segment_count++;
     414             : 
     415          15 :     if (seg->increment_tc) {
     416           0 :         tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
     417           0 :         if (tcr) {
     418             :             /* search the first video stream */
     419           0 :             for (i = 0; i < s->nb_streams; i++) {
     420           0 :                 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
     421           0 :                     rate = s->streams[i]->avg_frame_rate;/* Get fps from the video stream */
     422           0 :                     err = av_timecode_init_from_string(&tc, rate, tcr->value, s);
     423           0 :                     if (err < 0) {
     424           0 :                         av_log(s, AV_LOG_WARNING, "Could not increment timecode, error occurred during timecode creation.");
     425           0 :                         break;
     426             :                     }
     427           0 :                     tc.start += (int)((seg->cur_entry.end_time - seg->cur_entry.start_time) * av_q2d(rate));/* increment timecode */
     428           0 :                     av_dict_set(&s->metadata, "timecode",
     429           0 :                                 av_timecode_make_string(&tc, buf, 0), 0);
     430           0 :                     break;
     431             :                 }
     432             :             }
     433             :         } else {
     434           0 :             av_log(s, AV_LOG_WARNING, "Could not increment timecode, no timecode metadata found");
     435             :         }
     436             :     }
     437             : 
     438          30 : end:
     439          15 :     ff_format_io_close(oc, &oc->pb);
     440             : 
     441          15 :     return ret;
     442             : }
     443             : 
     444           0 : static int parse_times(void *log_ctx, int64_t **times, int *nb_times,
     445             :                        const char *times_str)
     446             : {
     447             :     char *p;
     448           0 :     int i, ret = 0;
     449           0 :     char *times_str1 = av_strdup(times_str);
     450           0 :     char *saveptr = NULL;
     451             : 
     452           0 :     if (!times_str1)
     453           0 :         return AVERROR(ENOMEM);
     454             : 
     455             : #define FAIL(err) ret = err; goto end
     456             : 
     457           0 :     *nb_times = 1;
     458           0 :     for (p = times_str1; *p; p++)
     459           0 :         if (*p == ',')
     460           0 :             (*nb_times)++;
     461             : 
     462           0 :     *times = av_malloc_array(*nb_times, sizeof(**times));
     463           0 :     if (!*times) {
     464           0 :         av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n");
     465           0 :         FAIL(AVERROR(ENOMEM));
     466             :     }
     467             : 
     468           0 :     p = times_str1;
     469           0 :     for (i = 0; i < *nb_times; i++) {
     470             :         int64_t t;
     471           0 :         char *tstr = av_strtok(p, ",", &saveptr);
     472           0 :         p = NULL;
     473             : 
     474           0 :         if (!tstr || !tstr[0]) {
     475           0 :             av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n",
     476             :                    times_str);
     477           0 :             FAIL(AVERROR(EINVAL));
     478             :         }
     479             : 
     480           0 :         ret = av_parse_time(&t, tstr, 1);
     481           0 :         if (ret < 0) {
     482           0 :             av_log(log_ctx, AV_LOG_ERROR,
     483             :                    "Invalid time duration specification '%s' in times list %s\n", tstr, times_str);
     484           0 :             FAIL(AVERROR(EINVAL));
     485             :         }
     486           0 :         (*times)[i] = t;
     487             : 
     488             :         /* check on monotonicity */
     489           0 :         if (i && (*times)[i-1] > (*times)[i]) {
     490           0 :             av_log(log_ctx, AV_LOG_ERROR,
     491             :                    "Specified time %f is greater than the following time %f\n",
     492           0 :                    (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000);
     493           0 :             FAIL(AVERROR(EINVAL));
     494             :         }
     495             :     }
     496             : 
     497           0 : end:
     498           0 :     av_free(times_str1);
     499           0 :     return ret;
     500             : }
     501             : 
     502           0 : static int parse_frames(void *log_ctx, int **frames, int *nb_frames,
     503             :                         const char *frames_str)
     504             : {
     505             :     char *p;
     506           0 :     int i, ret = 0;
     507           0 :     char *frames_str1 = av_strdup(frames_str);
     508           0 :     char *saveptr = NULL;
     509             : 
     510           0 :     if (!frames_str1)
     511           0 :         return AVERROR(ENOMEM);
     512             : 
     513             : #define FAIL(err) ret = err; goto end
     514             : 
     515           0 :     *nb_frames = 1;
     516           0 :     for (p = frames_str1; *p; p++)
     517           0 :         if (*p == ',')
     518           0 :             (*nb_frames)++;
     519             : 
     520           0 :     *frames = av_malloc_array(*nb_frames, sizeof(**frames));
     521           0 :     if (!*frames) {
     522           0 :         av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n");
     523           0 :         FAIL(AVERROR(ENOMEM));
     524             :     }
     525             : 
     526           0 :     p = frames_str1;
     527           0 :     for (i = 0; i < *nb_frames; i++) {
     528             :         long int f;
     529             :         char *tailptr;
     530           0 :         char *fstr = av_strtok(p, ",", &saveptr);
     531             : 
     532           0 :         p = NULL;
     533           0 :         if (!fstr) {
     534           0 :             av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n",
     535             :                    frames_str);
     536           0 :             FAIL(AVERROR(EINVAL));
     537             :         }
     538           0 :         f = strtol(fstr, &tailptr, 10);
     539           0 :         if (*tailptr || f <= 0 || f >= INT_MAX) {
     540           0 :             av_log(log_ctx, AV_LOG_ERROR,
     541             :                    "Invalid argument '%s', must be a positive integer <= INT64_MAX\n",
     542             :                    fstr);
     543           0 :             FAIL(AVERROR(EINVAL));
     544             :         }
     545           0 :         (*frames)[i] = f;
     546             : 
     547             :         /* check on monotonicity */
     548           0 :         if (i && (*frames)[i-1] > (*frames)[i]) {
     549           0 :             av_log(log_ctx, AV_LOG_ERROR,
     550             :                    "Specified frame %d is greater than the following frame %d\n",
     551           0 :                    (*frames)[i], (*frames)[i-1]);
     552           0 :             FAIL(AVERROR(EINVAL));
     553             :         }
     554             :     }
     555             : 
     556           0 : end:
     557           0 :     av_free(frames_str1);
     558           0 :     return ret;
     559             : }
     560             : 
     561           0 : static int open_null_ctx(AVIOContext **ctx)
     562             : {
     563           0 :     int buf_size = 32768;
     564           0 :     uint8_t *buf = av_malloc(buf_size);
     565           0 :     if (!buf)
     566           0 :         return AVERROR(ENOMEM);
     567           0 :     *ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL);
     568           0 :     if (!*ctx) {
     569           0 :         av_free(buf);
     570           0 :         return AVERROR(ENOMEM);
     571             :     }
     572           0 :     return 0;
     573             : }
     574             : 
     575           0 : static void close_null_ctxp(AVIOContext **pb)
     576             : {
     577           0 :     av_freep(&(*pb)->buffer);
     578           0 :     avio_context_free(pb);
     579           0 : }
     580             : 
     581           5 : static int select_reference_stream(AVFormatContext *s)
     582             : {
     583           5 :     SegmentContext *seg = s->priv_data;
     584             :     int ret, i;
     585             : 
     586           5 :     seg->reference_stream_index = -1;
     587           5 :     if (!strcmp(seg->reference_stream_specifier, "auto")) {
     588             :         /* select first index of type with highest priority */
     589             :         int type_index_map[AVMEDIA_TYPE_NB];
     590             :         static const enum AVMediaType type_priority_list[] = {
     591             :             AVMEDIA_TYPE_VIDEO,
     592             :             AVMEDIA_TYPE_AUDIO,
     593             :             AVMEDIA_TYPE_SUBTITLE,
     594             :             AVMEDIA_TYPE_DATA,
     595             :             AVMEDIA_TYPE_ATTACHMENT
     596             :         };
     597             :         enum AVMediaType type;
     598             : 
     599          30 :         for (i = 0; i < AVMEDIA_TYPE_NB; i++)
     600          25 :             type_index_map[i] = -1;
     601             : 
     602             :         /* select first index for each type */
     603          10 :         for (i = 0; i < s->nb_streams; i++) {
     604           5 :             type = s->streams[i]->codecpar->codec_type;
     605           5 :             if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1
     606             :                 /* ignore attached pictures/cover art streams */
     607           5 :                 && !(s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC))
     608           5 :                 type_index_map[type] = i;
     609             :         }
     610             : 
     611           9 :         for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
     612           9 :             type = type_priority_list[i];
     613           9 :             if ((seg->reference_stream_index = type_index_map[type]) >= 0)
     614           5 :                 break;
     615             :         }
     616             :     } else {
     617           0 :         for (i = 0; i < s->nb_streams; i++) {
     618           0 :             ret = avformat_match_stream_specifier(s, s->streams[i],
     619           0 :                                                   seg->reference_stream_specifier);
     620           0 :             if (ret < 0)
     621           0 :                 return ret;
     622           0 :             if (ret > 0) {
     623           0 :                 seg->reference_stream_index = i;
     624           0 :                 break;
     625             :             }
     626             :         }
     627             :     }
     628             : 
     629           5 :     if (seg->reference_stream_index < 0) {
     630           0 :         av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
     631             :                seg->reference_stream_specifier);
     632           0 :         return AVERROR(EINVAL);
     633             :     }
     634             : 
     635           5 :     return 0;
     636             : }
     637             : 
     638           5 : static void seg_free(AVFormatContext *s)
     639             : {
     640           5 :     SegmentContext *seg = s->priv_data;
     641           5 :     ff_format_io_close(seg->avf, &seg->list_pb);
     642           5 :     avformat_free_context(seg->avf);
     643           5 :     seg->avf = NULL;
     644           5 : }
     645             : 
     646           5 : static int seg_init(AVFormatContext *s)
     647             : {
     648           5 :     SegmentContext *seg = s->priv_data;
     649           5 :     AVFormatContext *oc = seg->avf;
     650           5 :     AVDictionary *options = NULL;
     651             :     int ret;
     652             :     int i;
     653             : 
     654           5 :     seg->segment_count = 0;
     655           5 :     if (!seg->write_header_trailer)
     656           0 :         seg->individual_header_trailer = 0;
     657             : 
     658           5 :     if (seg->header_filename) {
     659           1 :         seg->write_header_trailer = 1;
     660           1 :         seg->individual_header_trailer = 0;
     661             :     }
     662             : 
     663           5 :     if (seg->initial_offset > 0) {
     664           0 :         av_log(s, AV_LOG_WARNING, "NOTE: the option initial_offset is deprecated,"
     665             :                "you can use output_ts_offset instead of it\n");
     666             :     }
     667             : 
     668           5 :     if (!!seg->time_str + !!seg->times_str + !!seg->frames_str > 1) {
     669           0 :         av_log(s, AV_LOG_ERROR,
     670             :                "segment_time, segment_times, and segment_frames options "
     671             :                "are mutually exclusive, select just one of them\n");
     672           0 :         return AVERROR(EINVAL);
     673             :     }
     674             : 
     675           5 :     if (seg->times_str) {
     676           0 :         if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
     677           0 :             return ret;
     678           5 :     } else if (seg->frames_str) {
     679           0 :         if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0)
     680           0 :             return ret;
     681             :     } else {
     682             :         /* set default value if not specified */
     683           5 :         if (!seg->time_str)
     684           0 :             seg->time_str = av_strdup("2");
     685           5 :         if ((ret = av_parse_time(&seg->time, seg->time_str, 1)) < 0) {
     686           0 :             av_log(s, AV_LOG_ERROR,
     687             :                    "Invalid time duration specification '%s' for segment_time option\n",
     688             :                    seg->time_str);
     689           0 :             return ret;
     690             :         }
     691           5 :         if (seg->use_clocktime) {
     692           0 :             if (seg->time <= 0) {
     693           0 :                 av_log(s, AV_LOG_ERROR, "Invalid negative segment_time with segment_atclocktime option set\n");
     694           0 :                 return AVERROR(EINVAL);
     695             :             }
     696           0 :             seg->clocktime_offset = seg->time - (seg->clocktime_offset % seg->time);
     697             :         }
     698             :     }
     699             : 
     700           5 :     if (seg->format_options_str) {
     701           2 :         ret = av_dict_parse_string(&seg->format_options, seg->format_options_str, "=", ":", 0);
     702           2 :         if (ret < 0) {
     703           0 :             av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n",
     704             :                    seg->format_options_str);
     705           0 :             return ret;
     706             :         }
     707             :     }
     708             : 
     709           5 :     if (seg->list) {
     710           4 :         if (seg->list_type == LIST_TYPE_UNDEFINED) {
     711           4 :             if      (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV;
     712           4 :             else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT;
     713           4 :             else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8;
     714           0 :             else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT;
     715           0 :             else                                      seg->list_type = LIST_TYPE_FLAT;
     716             :         }
     717           4 :         if (!seg->list_size && seg->list_type != LIST_TYPE_M3U8) {
     718           0 :             if ((ret = segment_list_open(s)) < 0)
     719           0 :                 return ret;
     720             :         } else {
     721           4 :             const char *proto = avio_find_protocol_name(seg->list);
     722           4 :             seg->use_rename = proto && !strcmp(proto, "file");
     723             :         }
     724             :     }
     725             : 
     726           5 :     if (seg->list_type == LIST_TYPE_EXT)
     727           0 :         av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
     728             : 
     729           5 :     if ((ret = select_reference_stream(s)) < 0)
     730           0 :         return ret;
     731           5 :     av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n",
     732             :            seg->reference_stream_index,
     733           5 :            av_get_media_type_string(s->streams[seg->reference_stream_index]->codecpar->codec_type));
     734             : 
     735           5 :     seg->oformat = av_guess_format(seg->format, s->url, NULL);
     736             : 
     737           5 :     if (!seg->oformat)
     738           0 :         return AVERROR_MUXER_NOT_FOUND;
     739           5 :     if (seg->oformat->flags & AVFMT_NOFILE) {
     740           0 :         av_log(s, AV_LOG_ERROR, "format %s not supported.\n",
     741           0 :                seg->oformat->name);
     742           0 :         return AVERROR(EINVAL);
     743             :     }
     744             : 
     745           5 :     if ((ret = segment_mux_init(s)) < 0)
     746           0 :         return ret;
     747             : 
     748           5 :     if ((ret = set_segment_filename(s)) < 0)
     749           0 :         return ret;
     750           5 :     oc = seg->avf;
     751             : 
     752           5 :     if (seg->write_header_trailer) {
     753          10 :         if ((ret = s->io_open(s, &oc->pb,
     754           5 :                               seg->header_filename ? seg->header_filename : oc->url,
     755             :                               AVIO_FLAG_WRITE, NULL)) < 0) {
     756           0 :             av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->url);
     757           0 :             return ret;
     758             :         }
     759           5 :         if (!seg->individual_header_trailer)
     760           1 :             oc->pb->seekable = 0;
     761             :     } else {
     762           0 :         if ((ret = open_null_ctx(&oc->pb)) < 0)
     763           0 :             return ret;
     764             :     }
     765             : 
     766           5 :     av_dict_copy(&options, seg->format_options, 0);
     767           5 :     av_dict_set(&options, "fflags", "-autobsf", 0);
     768           5 :     ret = avformat_init_output(oc, &options);
     769           5 :     if (av_dict_count(options)) {
     770           0 :         av_log(s, AV_LOG_ERROR,
     771             :                "Some of the provided format options in '%s' are not recognized\n", seg->format_options_str);
     772           0 :         av_dict_free(&options);
     773           0 :         return AVERROR(EINVAL);
     774             :     }
     775           5 :     av_dict_free(&options);
     776             : 
     777           5 :     if (ret < 0) {
     778           0 :         ff_format_io_close(oc, &oc->pb);
     779           0 :         return ret;
     780             :     }
     781           5 :     seg->segment_frame_count = 0;
     782             : 
     783           5 :     av_assert0(s->nb_streams == oc->nb_streams);
     784           5 :     if (ret == AVSTREAM_INIT_IN_WRITE_HEADER) {
     785           0 :         ret = avformat_write_header(oc, NULL);
     786           0 :         if (ret < 0)
     787           0 :             return ret;
     788           0 :         seg->header_written = 1;
     789             :     }
     790             : 
     791          10 :     for (i = 0; i < s->nb_streams; i++) {
     792           5 :         AVStream *inner_st  = oc->streams[i];
     793           5 :         AVStream *outer_st = s->streams[i];
     794           5 :         avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
     795             :     }
     796             : 
     797           5 :     if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0)
     798           5 :         s->avoid_negative_ts = 1;
     799             : 
     800           5 :     return ret;
     801             : }
     802             : 
     803           5 : static int seg_write_header(AVFormatContext *s)
     804             : {
     805           5 :     SegmentContext *seg = s->priv_data;
     806           5 :     AVFormatContext *oc = seg->avf;
     807             :     int ret, i;
     808             : 
     809           5 :     if (!seg->header_written) {
     810          10 :         for (i = 0; i < s->nb_streams; i++) {
     811           5 :             AVStream *st = oc->streams[i];
     812             :             AVCodecParameters *ipar, *opar;
     813             : 
     814           5 :             ipar = s->streams[i]->codecpar;
     815           5 :             opar = oc->streams[i]->codecpar;
     816           5 :             avcodec_parameters_copy(opar, ipar);
     817           7 :             if (!oc->oformat->codec_tag ||
     818           4 :                 av_codec_get_id (oc->oformat->codec_tag, ipar->codec_tag) == opar->codec_id ||
     819           2 :                 av_codec_get_tag(oc->oformat->codec_tag, ipar->codec_id) <= 0) {
     820           3 :                 opar->codec_tag = ipar->codec_tag;
     821             :             } else {
     822           2 :                 opar->codec_tag = 0;
     823             :             }
     824           5 :             st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
     825           5 :             st->time_base = s->streams[i]->time_base;
     826             :         }
     827           5 :         ret = avformat_write_header(oc, NULL);
     828           5 :         if (ret < 0)
     829           0 :             return ret;
     830             :     }
     831             : 
     832           5 :     if (!seg->write_header_trailer || seg->header_filename) {
     833           1 :         if (seg->header_filename) {
     834           1 :             av_write_frame(oc, NULL);
     835           1 :             ff_format_io_close(oc, &oc->pb);
     836             :         } else {
     837           0 :             close_null_ctxp(&oc->pb);
     838             :         }
     839           1 :         if ((ret = oc->io_open(oc, &oc->pb, oc->url, AVIO_FLAG_WRITE, NULL)) < 0)
     840           0 :             return ret;
     841           1 :         if (!seg->individual_header_trailer)
     842           1 :             oc->pb->seekable = 0;
     843             :     }
     844             : 
     845           5 :     return 0;
     846             : }
     847             : 
     848        1726 : static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
     849             : {
     850        1726 :     SegmentContext *seg = s->priv_data;
     851        1726 :     AVStream *st = s->streams[pkt->stream_index];
     852        1726 :     int64_t end_pts = INT64_MAX, offset;
     853        1726 :     int start_frame = INT_MAX;
     854             :     int ret;
     855             :     struct tm ti;
     856             :     int64_t usecs;
     857             :     int64_t wrapped_val;
     858             : 
     859        1726 :     if (!seg->avf || !seg->avf->pb)
     860           0 :         return AVERROR(EINVAL);
     861             : 
     862        1726 : calc_times:
     863        1726 :     if (seg->times) {
     864           0 :         end_pts = seg->segment_count < seg->nb_times ?
     865           0 :             seg->times[seg->segment_count] : INT64_MAX;
     866        1726 :     } else if (seg->frames) {
     867           0 :         start_frame = seg->segment_count < seg->nb_frames ?
     868           0 :             seg->frames[seg->segment_count] : INT_MAX;
     869             :     } else {
     870        1726 :         if (seg->use_clocktime) {
     871           0 :             int64_t avgt = av_gettime();
     872           0 :             time_t sec = avgt / 1000000;
     873           0 :             localtime_r(&sec, &ti);
     874           0 :             usecs = (int64_t)(ti.tm_hour * 3600 + ti.tm_min * 60 + ti.tm_sec) * 1000000 + (avgt % 1000000);
     875           0 :             wrapped_val = (usecs + seg->clocktime_offset) % seg->time;
     876           0 :             if (wrapped_val < seg->last_val && wrapped_val < seg->clocktime_wrap_duration)
     877           0 :                 seg->cut_pending = 1;
     878           0 :             seg->last_val = wrapped_val;
     879             :         } else {
     880        1726 :             end_pts = seg->time * (seg->segment_count + 1);
     881             :         }
     882             :     }
     883             : 
     884             :     ff_dlog(s, "packet stream:%d pts:%s pts_time:%s duration_time:%s is_key:%d frame:%d\n",
     885             :             pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
     886             :             av_ts2timestr(pkt->duration, &st->time_base),
     887             :             pkt->flags & AV_PKT_FLAG_KEY,
     888             :             pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1);
     889             : 
     890        3452 :     if (pkt->stream_index == seg->reference_stream_index &&
     891        3452 :         (pkt->flags & AV_PKT_FLAG_KEY || seg->break_non_keyframes) &&
     892        3212 :         (seg->segment_frame_count > 0 || seg->write_empty) &&
     893        4803 :         (seg->cut_pending || seg->frame_count >= start_frame ||
     894        3202 :          (pkt->pts != AV_NOPTS_VALUE &&
     895        1601 :           av_compare_ts(pkt->pts, st->time_base,
     896        1601 :                         end_pts - seg->time_delta, AV_TIME_BASE_Q) >= 0))) {
     897             :         /* sanitize end time in case last packet didn't have a defined duration */
     898          10 :         if (seg->cur_entry.last_duration == 0)
     899           0 :             seg->cur_entry.end_time = (double)pkt->pts * av_q2d(st->time_base);
     900             : 
     901          10 :         if ((ret = segment_end(s, seg->individual_header_trailer, 0)) < 0)
     902           0 :             goto fail;
     903             : 
     904          10 :         if ((ret = segment_start(s, seg->individual_header_trailer)) < 0)
     905           0 :             goto fail;
     906             : 
     907          10 :         seg->cut_pending = 0;
     908          10 :         seg->cur_entry.index = seg->segment_idx + seg->segment_idx_wrap * seg->segment_idx_wrap_nb;
     909          10 :         seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);
     910          10 :         seg->cur_entry.start_pts = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q);
     911          10 :         seg->cur_entry.end_time = seg->cur_entry.start_time;
     912             : 
     913          20 :         if (seg->times || (!seg->frames && !seg->use_clocktime) && seg->write_empty)
     914             :             goto calc_times;
     915             :     }
     916             : 
     917        1726 :     if (pkt->stream_index == seg->reference_stream_index) {
     918        1726 :         if (pkt->pts != AV_NOPTS_VALUE)
     919        1726 :             seg->cur_entry.end_time =
     920        1726 :                 FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
     921        1726 :         seg->cur_entry.last_duration = pkt->duration;
     922             :     }
     923             : 
     924        1726 :     if (seg->segment_frame_count == 0) {
     925          60 :         av_log(s, AV_LOG_VERBOSE, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n",
     926          15 :                seg->avf->url, pkt->stream_index,
     927          30 :                av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), seg->frame_count);
     928             :     }
     929             : 
     930       12082 :     av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s",
     931             :            pkt->stream_index,
     932        3452 :            av_ts2timestr(seg->cur_entry.start_pts, &AV_TIME_BASE_Q),
     933        3452 :            av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
     934        3452 :            av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
     935             : 
     936             :     /* compute new timestamps */
     937        1726 :     offset = av_rescale_q(seg->initial_offset - (seg->reset_timestamps ? seg->cur_entry.start_pts : 0),
     938        1726 :                           AV_TIME_BASE_Q, st->time_base);
     939        1726 :     if (pkt->pts != AV_NOPTS_VALUE)
     940        1726 :         pkt->pts += offset;
     941        1726 :     if (pkt->dts != AV_NOPTS_VALUE)
     942        1726 :         pkt->dts += offset;
     943             : 
     944        8630 :     av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
     945        3452 :            av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
     946        3452 :            av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
     947             : 
     948        1726 :     ret = ff_write_chained(seg->avf, pkt->stream_index, pkt, s, seg->initial_offset || seg->reset_timestamps);
     949             : 
     950        1726 : fail:
     951        1726 :     if (pkt->stream_index == seg->reference_stream_index) {
     952        1726 :         seg->frame_count++;
     953        1726 :         seg->segment_frame_count++;
     954             :     }
     955             : 
     956        1726 :     return ret;
     957             : }
     958             : 
     959           5 : static int seg_write_trailer(struct AVFormatContext *s)
     960             : {
     961           5 :     SegmentContext *seg = s->priv_data;
     962           5 :     AVFormatContext *oc = seg->avf;
     963             :     SegmentListEntry *cur, *next;
     964           5 :     int ret = 0;
     965             : 
     966           5 :     if (!oc)
     967           0 :         goto fail;
     968             : 
     969           5 :     if (!seg->write_header_trailer) {
     970           0 :         if ((ret = segment_end(s, 0, 1)) < 0)
     971           0 :             goto fail;
     972           0 :         if ((ret = open_null_ctx(&oc->pb)) < 0)
     973           0 :             goto fail;
     974           0 :         ret = av_write_trailer(oc);
     975           0 :         close_null_ctxp(&oc->pb);
     976             :     } else {
     977           5 :         ret = segment_end(s, 1, 1);
     978             :     }
     979           5 : fail:
     980           5 :     if (seg->list)
     981           4 :         ff_format_io_close(s, &seg->list_pb);
     982             : 
     983           5 :     av_dict_free(&seg->format_options);
     984           5 :     av_opt_free(seg);
     985           5 :     av_freep(&seg->times);
     986           5 :     av_freep(&seg->frames);
     987           5 :     av_freep(&seg->cur_entry.filename);
     988             : 
     989           5 :     cur = seg->segment_list_entries;
     990          22 :     while (cur) {
     991          12 :         next = cur->next;
     992          12 :         av_freep(&cur->filename);
     993          12 :         av_free(cur);
     994          12 :         cur = next;
     995             :     }
     996             : 
     997           5 :     avformat_free_context(oc);
     998           5 :     seg->avf = NULL;
     999           5 :     return ret;
    1000             : }
    1001             : 
    1002           5 : static int seg_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
    1003             : {
    1004           5 :     SegmentContext *seg = s->priv_data;
    1005           5 :     AVFormatContext *oc = seg->avf;
    1006           5 :     if (oc->oformat->check_bitstream) {
    1007           5 :         int ret = oc->oformat->check_bitstream(oc, pkt);
    1008           5 :         if (ret == 1) {
    1009           5 :             AVStream *st = s->streams[pkt->stream_index];
    1010           5 :             AVStream *ost = oc->streams[pkt->stream_index];
    1011           5 :             st->internal->bsfcs = ost->internal->bsfcs;
    1012           5 :             st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
    1013           5 :             ost->internal->bsfcs = NULL;
    1014           5 :             ost->internal->nb_bsfcs = 0;
    1015             :         }
    1016           5 :         return ret;
    1017             :     }
    1018           0 :     return 1;
    1019             : }
    1020             : 
    1021             : #define OFFSET(x) offsetof(SegmentContext, x)
    1022             : #define E AV_OPT_FLAG_ENCODING_PARAM
    1023             : static const AVOption options[] = {
    1024             :     { "reference_stream",  "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, CHAR_MIN, CHAR_MAX, E },
    1025             :     { "segment_format",    "set container format used for the segments", OFFSET(format),  AV_OPT_TYPE_STRING, {.str = NULL},  0, 0,       E },
    1026             :     { "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 },
    1027             :     { "segment_list",      "set the segment list filename",              OFFSET(list),    AV_OPT_TYPE_STRING, {.str = NULL},  0, 0,       E },
    1028             :     { "segment_header_filename", "write a single file containing the header", OFFSET(header_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
    1029             : 
    1030             :     { "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"},
    1031             :     { "cache",             "allow list caching",                                    0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX,   E, "list_flags"},
    1032             :     { "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"},
    1033             : 
    1034             :     { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT,  {.i64 = 0},     0, INT_MAX, E },
    1035             : 
    1036             :     { "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" },
    1037             :     { "flat", "flat format",     0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, "list_type" },
    1038             :     { "csv",  "csv format",      0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV  }, INT_MIN, INT_MAX, E, "list_type" },
    1039             :     { "ext",  "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT  }, INT_MIN, INT_MAX, E, "list_type" },
    1040             :     { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, "list_type" },
    1041             :     { "m3u8", "M3U8 format",     0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
    1042             :     { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" },
    1043             : 
    1044             :     { "segment_atclocktime",      "set segment to be cut at clocktime",  OFFSET(use_clocktime), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E},
    1045             :     { "segment_clocktime_offset", "set segment clocktime offset",        OFFSET(clocktime_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 86400000000LL, E},
    1046             :     { "segment_clocktime_wrap_duration", "set segment clocktime wrapping duration", OFFSET(clocktime_wrap_duration), AV_OPT_TYPE_DURATION, {.i64 = INT64_MAX}, 0, INT64_MAX, E},
    1047             :     { "segment_time",      "set segment duration",                       OFFSET(time_str),AV_OPT_TYPE_STRING, {.str = NULL},  0, 0,       E },
    1048             :     { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 0, E },
    1049             :     { "segment_times",     "set segment split time points",              OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL},  0, 0,       E },
    1050             :     { "segment_frames",    "set segment split frame numbers",            OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL},  0, 0,       E },
    1051             :     { "segment_wrap",      "set number after which the index wraps",     OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
    1052             :     { "segment_list_entry_prefix", "set base url prefix for segments", OFFSET(entry_prefix), AV_OPT_TYPE_STRING,  {.str = NULL}, 0, 0, E },
    1053             :     { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
    1054             :     { "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 },
    1055             :     { "strftime",          "set filename expansion with strftime at segment creation", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
    1056             :     { "increment_tc", "increment timecode between each segment", OFFSET(increment_tc), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
    1057             :     { "break_non_keyframes", "allow breaking segments on non-keyframes", OFFSET(break_non_keyframes), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
    1058             : 
    1059             :     { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },
    1060             :     { "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 },
    1061             :     { "reset_timestamps", "reset timestamps at the beginning of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
    1062             :     { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E },
    1063             :     { "write_empty_segments", "allow writing empty 'filler' segments", OFFSET(write_empty), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
    1064             :     { NULL },
    1065             : };
    1066             : 
    1067             : #if CONFIG_SEGMENT_MUXER
    1068             : static const AVClass seg_class = {
    1069             :     .class_name = "segment muxer",
    1070             :     .item_name  = av_default_item_name,
    1071             :     .option     = options,
    1072             :     .version    = LIBAVUTIL_VERSION_INT,
    1073             : };
    1074             : 
    1075             : AVOutputFormat ff_segment_muxer = {
    1076             :     .name           = "segment",
    1077             :     .long_name      = NULL_IF_CONFIG_SMALL("segment"),
    1078             :     .priv_data_size = sizeof(SegmentContext),
    1079             :     .flags          = AVFMT_NOFILE|AVFMT_GLOBALHEADER,
    1080             :     .init           = seg_init,
    1081             :     .write_header   = seg_write_header,
    1082             :     .write_packet   = seg_write_packet,
    1083             :     .write_trailer  = seg_write_trailer,
    1084             :     .deinit         = seg_free,
    1085             :     .check_bitstream = seg_check_bitstream,
    1086             :     .priv_class     = &seg_class,
    1087             : };
    1088             : #endif
    1089             : 
    1090             : #if CONFIG_STREAM_SEGMENT_MUXER
    1091             : static const AVClass sseg_class = {
    1092             :     .class_name = "stream_segment muxer",
    1093             :     .item_name  = av_default_item_name,
    1094             :     .option     = options,
    1095             :     .version    = LIBAVUTIL_VERSION_INT,
    1096             : };
    1097             : 
    1098             : AVOutputFormat ff_stream_segment_muxer = {
    1099             :     .name           = "stream_segment,ssegment",
    1100             :     .long_name      = NULL_IF_CONFIG_SMALL("streaming segment muxer"),
    1101             :     .priv_data_size = sizeof(SegmentContext),
    1102             :     .flags          = AVFMT_NOFILE,
    1103             :     .init           = seg_init,
    1104             :     .write_header   = seg_write_header,
    1105             :     .write_packet   = seg_write_packet,
    1106             :     .write_trailer  = seg_write_trailer,
    1107             :     .deinit         = seg_free,
    1108             :     .check_bitstream = seg_check_bitstream,
    1109             :     .priv_class     = &sseg_class,
    1110             : };
    1111             : #endif

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