| /* |
| * Copyright (c) 2011, Luca Barbato |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file generic segmenter |
| * M3U8 specification can be find here: |
| * @url{http://tools.ietf.org/id/draft-pantos-http-live-streaming} |
| */ |
| |
| /* #define DEBUG */ |
| |
| #include <float.h> |
| #include <time.h> |
| |
| #include "avformat.h" |
| #include "avio_internal.h" |
| #include "internal.h" |
| |
| #include "libavutil/avassert.h" |
| #include "libavutil/internal.h" |
| #include "libavutil/log.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/avstring.h" |
| #include "libavutil/parseutils.h" |
| #include "libavutil/mathematics.h" |
| #include "libavutil/time.h" |
| #include "libavutil/time_internal.h" |
| #include "libavutil/timestamp.h" |
| |
| typedef struct SegmentListEntry { |
| int index; |
| double start_time, end_time; |
| int64_t start_pts; |
| int64_t offset_pts; |
| char *filename; |
| struct SegmentListEntry *next; |
| int64_t last_duration; |
| } SegmentListEntry; |
| |
| typedef enum { |
| LIST_TYPE_UNDEFINED = -1, |
| LIST_TYPE_FLAT = 0, |
| LIST_TYPE_CSV, |
| LIST_TYPE_M3U8, |
| LIST_TYPE_EXT, ///< deprecated |
| LIST_TYPE_FFCONCAT, |
| LIST_TYPE_NB, |
| } ListType; |
| |
| #define SEGMENT_LIST_FLAG_CACHE 1 |
| #define SEGMENT_LIST_FLAG_LIVE 2 |
| |
| typedef struct SegmentContext { |
| const AVClass *class; /**< Class for private options. */ |
| int segment_idx; ///< index of the segment file to write, starting from 0 |
| int segment_idx_wrap; ///< number after which the index wraps |
| int segment_idx_wrap_nb; ///< number of time the index has wraped |
| int segment_count; ///< number of segment files already written |
| AVOutputFormat *oformat; |
| AVFormatContext *avf; |
| char *format; ///< format to use for output segment files |
| char *format_options_str; ///< format options to use for output segment files |
| AVDictionary *format_options; |
| char *list; ///< filename for the segment list file |
| int list_flags; ///< flags affecting list generation |
| int list_size; ///< number of entries for the segment list file |
| |
| int use_clocktime; ///< flag to cut segments at regular clock time |
| int64_t clocktime_offset; //< clock offset for cutting the segments at regular clock time |
| int64_t clocktime_wrap_duration; //< wrapping duration considered for starting a new segment |
| int64_t last_val; ///< remember last time for wrap around detection |
| int64_t last_cut; ///< remember last cut |
| int cut_pending; |
| |
| char *entry_prefix; ///< prefix to add to list entry filenames |
| int list_type; ///< set the list type |
| AVIOContext *list_pb; ///< list file put-byte context |
| char *time_str; ///< segment duration specification string |
| int64_t time; ///< segment duration |
| int use_strftime; ///< flag to expand filename with strftime |
| |
| char *times_str; ///< segment times specification string |
| int64_t *times; ///< list of segment interval specification |
| int nb_times; ///< number of elments in the times array |
| |
| char *frames_str; ///< segment frame numbers specification string |
| int *frames; ///< list of frame number specification |
| int nb_frames; ///< number of elments in the frames array |
| int frame_count; ///< total number of reference frames |
| int segment_frame_count; ///< number of reference frames in the segment |
| |
| int64_t time_delta; |
| int individual_header_trailer; /**< Set by a private option. */ |
| int write_header_trailer; /**< Set by a private option. */ |
| char *header_filename; ///< filename to write the output header to |
| |
| int reset_timestamps; ///< reset timestamps at the begin of each segment |
| int64_t initial_offset; ///< initial timestamps offset, expressed in microseconds |
| char *reference_stream_specifier; ///< reference stream specifier |
| int reference_stream_index; |
| int break_non_keyframes; |
| |
| int use_rename; |
| char temp_list_filename[1024]; |
| |
| SegmentListEntry cur_entry; |
| SegmentListEntry *segment_list_entries; |
| SegmentListEntry *segment_list_entries_end; |
| } SegmentContext; |
| |
| static void print_csv_escaped_str(AVIOContext *ctx, const char *str) |
| { |
| int needs_quoting = !!str[strcspn(str, "\",\n\r")]; |
| |
| if (needs_quoting) |
| avio_w8(ctx, '"'); |
| |
| for (; *str; str++) { |
| if (*str == '"') |
| avio_w8(ctx, '"'); |
| avio_w8(ctx, *str); |
| } |
| if (needs_quoting) |
| avio_w8(ctx, '"'); |
| } |
| |
| static int segment_mux_init(AVFormatContext *s) |
| { |
| SegmentContext *seg = s->priv_data; |
| AVFormatContext *oc; |
| int i; |
| int ret; |
| |
| ret = avformat_alloc_output_context2(&seg->avf, seg->oformat, NULL, NULL); |
| if (ret < 0) |
| return ret; |
| oc = seg->avf; |
| |
| oc->interrupt_callback = s->interrupt_callback; |
| oc->max_delay = s->max_delay; |
| av_dict_copy(&oc->metadata, s->metadata, 0); |
| oc->opaque = s->opaque; |
| oc->io_close = s->io_close; |
| oc->io_open = s->io_open; |
| |
| for (i = 0; i < s->nb_streams; i++) { |
| AVStream *st; |
| AVCodecContext *icodec, *ocodec; |
| |
| if (!(st = avformat_new_stream(oc, NULL))) |
| return AVERROR(ENOMEM); |
| icodec = s->streams[i]->codec; |
| ocodec = st->codec; |
| avcodec_copy_context(ocodec, icodec); |
| if (!oc->oformat->codec_tag || |
| av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == ocodec->codec_id || |
| av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0) { |
| ocodec->codec_tag = icodec->codec_tag; |
| } else { |
| ocodec->codec_tag = 0; |
| } |
| st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio; |
| st->time_base = s->streams[i]->time_base; |
| av_dict_copy(&st->metadata, s->streams[i]->metadata, 0); |
| } |
| |
| return 0; |
| } |
| |
| static int set_segment_filename(AVFormatContext *s) |
| { |
| SegmentContext *seg = s->priv_data; |
| AVFormatContext *oc = seg->avf; |
| size_t size; |
| int ret; |
| |
| if (seg->segment_idx_wrap) |
| seg->segment_idx %= seg->segment_idx_wrap; |
| if (seg->use_strftime) { |
| time_t now0; |
| struct tm *tm, tmpbuf; |
| time(&now0); |
| tm = localtime_r(&now0, &tmpbuf); |
| if (!strftime(oc->filename, sizeof(oc->filename), s->filename, tm)) { |
| av_log(oc, AV_LOG_ERROR, "Could not get segment filename with strftime\n"); |
| return AVERROR(EINVAL); |
| } |
| } else if (av_get_frame_filename(oc->filename, sizeof(oc->filename), |
| s->filename, seg->segment_idx) < 0) { |
| av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->filename); |
| return AVERROR(EINVAL); |
| } |
| |
| /* copy modified name in list entry */ |
| size = strlen(av_basename(oc->filename)) + 1; |
| if (seg->entry_prefix) |
| size += strlen(seg->entry_prefix); |
| |
| if ((ret = av_reallocp(&seg->cur_entry.filename, size)) < 0) |
| return ret; |
| snprintf(seg->cur_entry.filename, size, "%s%s", |
| seg->entry_prefix ? seg->entry_prefix : "", |
| av_basename(oc->filename)); |
| |
| return 0; |
| } |
| |
| static int segment_start(AVFormatContext *s, int write_header) |
| { |
| SegmentContext *seg = s->priv_data; |
| AVFormatContext *oc = seg->avf; |
| int err = 0; |
| |
| if (write_header) { |
| avformat_free_context(oc); |
| seg->avf = NULL; |
| if ((err = segment_mux_init(s)) < 0) |
| return err; |
| oc = seg->avf; |
| } |
| |
| seg->segment_idx++; |
| if ((seg->segment_idx_wrap) && (seg->segment_idx % seg->segment_idx_wrap == 0)) |
| seg->segment_idx_wrap_nb++; |
| |
| if ((err = set_segment_filename(s)) < 0) |
| return err; |
| |
| if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, NULL)) < 0) { |
| av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->filename); |
| return err; |
| } |
| if (!seg->individual_header_trailer) |
| oc->pb->seekable = 0; |
| |
| if (oc->oformat->priv_class && oc->priv_data) |
| av_opt_set(oc->priv_data, "mpegts_flags", "+resend_headers", 0); |
| |
| if (write_header) { |
| if ((err = avformat_write_header(oc, NULL)) < 0) |
| return err; |
| } |
| |
| seg->segment_frame_count = 0; |
| return 0; |
| } |
| |
| static int segment_list_open(AVFormatContext *s) |
| { |
| SegmentContext *seg = s->priv_data; |
| int ret; |
| |
| snprintf(seg->temp_list_filename, sizeof(seg->temp_list_filename), seg->use_rename ? "%s.tmp" : "%s", seg->list); |
| ret = s->io_open(s, &seg->list_pb, seg->temp_list_filename, AVIO_FLAG_WRITE, NULL); |
| if (ret < 0) { |
| av_log(s, AV_LOG_ERROR, "Failed to open segment list '%s'\n", seg->list); |
| return ret; |
| } |
| |
| if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) { |
| SegmentListEntry *entry; |
| double max_duration = 0; |
| |
| avio_printf(seg->list_pb, "#EXTM3U\n"); |
| avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n"); |
| avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index); |
| avio_printf(seg->list_pb, "#EXT-X-ALLOW-CACHE:%s\n", |
| seg->list_flags & SEGMENT_LIST_FLAG_CACHE ? "YES" : "NO"); |
| |
| av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%d\n", |
| seg->segment_list_entries->index); |
| |
| for (entry = seg->segment_list_entries; entry; entry = entry->next) |
| max_duration = FFMAX(max_duration, entry->end_time - entry->start_time); |
| avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration)); |
| } else if (seg->list_type == LIST_TYPE_FFCONCAT) { |
| avio_printf(seg->list_pb, "ffconcat version 1.0\n"); |
| } |
| |
| return ret; |
| } |
| |
| static void segment_list_print_entry(AVIOContext *list_ioctx, |
| ListType list_type, |
| const SegmentListEntry *list_entry, |
| void *log_ctx) |
| { |
| switch (list_type) { |
| case LIST_TYPE_FLAT: |
| avio_printf(list_ioctx, "%s\n", list_entry->filename); |
| break; |
| case LIST_TYPE_CSV: |
| case LIST_TYPE_EXT: |
| print_csv_escaped_str(list_ioctx, list_entry->filename); |
| avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time); |
| break; |
| case LIST_TYPE_M3U8: |
| avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n", |
| list_entry->end_time - list_entry->start_time, list_entry->filename); |
| break; |
| case LIST_TYPE_FFCONCAT: |
| { |
| char *buf; |
| if (av_escape(&buf, list_entry->filename, NULL, AV_ESCAPE_MODE_AUTO, AV_ESCAPE_FLAG_WHITESPACE) < 0) { |
| av_log(log_ctx, AV_LOG_WARNING, |
| "Error writing list entry '%s' in list file\n", list_entry->filename); |
| return; |
| } |
| avio_printf(list_ioctx, "file %s\n", buf); |
| av_free(buf); |
| break; |
| } |
| default: |
| av_assert0(!"Invalid list type"); |
| } |
| } |
| |
| static int segment_end(AVFormatContext *s, int write_trailer, int is_last) |
| { |
| SegmentContext *seg = s->priv_data; |
| AVFormatContext *oc = seg->avf; |
| int ret = 0; |
| |
| av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */ |
| if (write_trailer) |
| ret = av_write_trailer(oc); |
| |
| if (ret < 0) |
| av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n", |
| oc->filename); |
| |
| if (seg->list) { |
| if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) { |
| SegmentListEntry *entry = av_mallocz(sizeof(*entry)); |
| if (!entry) { |
| ret = AVERROR(ENOMEM); |
| goto end; |
| } |
| |
| /* append new element */ |
| memcpy(entry, &seg->cur_entry, sizeof(*entry)); |
| entry->filename = av_strdup(entry->filename); |
| if (!seg->segment_list_entries) |
| seg->segment_list_entries = seg->segment_list_entries_end = entry; |
| else |
| seg->segment_list_entries_end->next = entry; |
| seg->segment_list_entries_end = entry; |
| |
| /* drop first item */ |
| if (seg->list_size && seg->segment_count >= seg->list_size) { |
| entry = seg->segment_list_entries; |
| seg->segment_list_entries = seg->segment_list_entries->next; |
| av_freep(&entry->filename); |
| av_freep(&entry); |
| } |
| |
| if ((ret = segment_list_open(s)) < 0) |
| goto end; |
| for (entry = seg->segment_list_entries; entry; entry = entry->next) |
| segment_list_print_entry(seg->list_pb, seg->list_type, entry, s); |
| if (seg->list_type == LIST_TYPE_M3U8 && is_last) |
| avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n"); |
| ff_format_io_close(s, &seg->list_pb); |
| if (seg->use_rename) |
| ff_rename(seg->temp_list_filename, seg->list, s); |
| } else { |
| segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry, s); |
| avio_flush(seg->list_pb); |
| } |
| } |
| |
| av_log(s, AV_LOG_VERBOSE, "segment:'%s' count:%d ended\n", |
| seg->avf->filename, seg->segment_count); |
| seg->segment_count++; |
| |
| end: |
| ff_format_io_close(oc, &oc->pb); |
| |
| return ret; |
| } |
| |
| static int parse_times(void *log_ctx, int64_t **times, int *nb_times, |
| const char *times_str) |
| { |
| char *p; |
| int i, ret = 0; |
| char *times_str1 = av_strdup(times_str); |
| char *saveptr = NULL; |
| |
| if (!times_str1) |
| return AVERROR(ENOMEM); |
| |
| #define FAIL(err) ret = err; goto end |
| |
| *nb_times = 1; |
| for (p = times_str1; *p; p++) |
| if (*p == ',') |
| (*nb_times)++; |
| |
| *times = av_malloc_array(*nb_times, sizeof(**times)); |
| if (!*times) { |
| av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n"); |
| FAIL(AVERROR(ENOMEM)); |
| } |
| |
| p = times_str1; |
| for (i = 0; i < *nb_times; i++) { |
| int64_t t; |
| char *tstr = av_strtok(p, ",", &saveptr); |
| p = NULL; |
| |
| if (!tstr || !tstr[0]) { |
| av_log(log_ctx, AV_LOG_ERROR, "Empty time specification in times list %s\n", |
| times_str); |
| FAIL(AVERROR(EINVAL)); |
| } |
| |
| ret = av_parse_time(&t, tstr, 1); |
| if (ret < 0) { |
| av_log(log_ctx, AV_LOG_ERROR, |
| "Invalid time duration specification '%s' in times list %s\n", tstr, times_str); |
| FAIL(AVERROR(EINVAL)); |
| } |
| (*times)[i] = t; |
| |
| /* check on monotonicity */ |
| if (i && (*times)[i-1] > (*times)[i]) { |
| av_log(log_ctx, AV_LOG_ERROR, |
| "Specified time %f is greater than the following time %f\n", |
| (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000); |
| FAIL(AVERROR(EINVAL)); |
| } |
| } |
| |
| end: |
| av_free(times_str1); |
| return ret; |
| } |
| |
| static int parse_frames(void *log_ctx, int **frames, int *nb_frames, |
| const char *frames_str) |
| { |
| char *p; |
| int i, ret = 0; |
| char *frames_str1 = av_strdup(frames_str); |
| char *saveptr = NULL; |
| |
| if (!frames_str1) |
| return AVERROR(ENOMEM); |
| |
| #define FAIL(err) ret = err; goto end |
| |
| *nb_frames = 1; |
| for (p = frames_str1; *p; p++) |
| if (*p == ',') |
| (*nb_frames)++; |
| |
| *frames = av_malloc_array(*nb_frames, sizeof(**frames)); |
| if (!*frames) { |
| av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced frames array\n"); |
| FAIL(AVERROR(ENOMEM)); |
| } |
| |
| p = frames_str1; |
| for (i = 0; i < *nb_frames; i++) { |
| long int f; |
| char *tailptr; |
| char *fstr = av_strtok(p, ",", &saveptr); |
| |
| p = NULL; |
| if (!fstr) { |
| av_log(log_ctx, AV_LOG_ERROR, "Empty frame specification in frame list %s\n", |
| frames_str); |
| FAIL(AVERROR(EINVAL)); |
| } |
| f = strtol(fstr, &tailptr, 10); |
| if (*tailptr || f <= 0 || f >= INT_MAX) { |
| av_log(log_ctx, AV_LOG_ERROR, |
| "Invalid argument '%s', must be a positive integer <= INT64_MAX\n", |
| fstr); |
| FAIL(AVERROR(EINVAL)); |
| } |
| (*frames)[i] = f; |
| |
| /* check on monotonicity */ |
| if (i && (*frames)[i-1] > (*frames)[i]) { |
| av_log(log_ctx, AV_LOG_ERROR, |
| "Specified frame %d is greater than the following frame %d\n", |
| (*frames)[i], (*frames)[i-1]); |
| FAIL(AVERROR(EINVAL)); |
| } |
| } |
| |
| end: |
| av_free(frames_str1); |
| return ret; |
| } |
| |
| static int open_null_ctx(AVIOContext **ctx) |
| { |
| int buf_size = 32768; |
| uint8_t *buf = av_malloc(buf_size); |
| if (!buf) |
| return AVERROR(ENOMEM); |
| *ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL); |
| if (!*ctx) { |
| av_free(buf); |
| return AVERROR(ENOMEM); |
| } |
| return 0; |
| } |
| |
| static void close_null_ctxp(AVIOContext **pb) |
| { |
| av_freep(&(*pb)->buffer); |
| av_freep(pb); |
| } |
| |
| static int select_reference_stream(AVFormatContext *s) |
| { |
| SegmentContext *seg = s->priv_data; |
| int ret, i; |
| |
| seg->reference_stream_index = -1; |
| if (!strcmp(seg->reference_stream_specifier, "auto")) { |
| /* select first index of type with highest priority */ |
| int type_index_map[AVMEDIA_TYPE_NB]; |
| static const enum AVMediaType type_priority_list[] = { |
| AVMEDIA_TYPE_VIDEO, |
| AVMEDIA_TYPE_AUDIO, |
| AVMEDIA_TYPE_SUBTITLE, |
| AVMEDIA_TYPE_DATA, |
| AVMEDIA_TYPE_ATTACHMENT |
| }; |
| enum AVMediaType type; |
| |
| for (i = 0; i < AVMEDIA_TYPE_NB; i++) |
| type_index_map[i] = -1; |
| |
| /* select first index for each type */ |
| for (i = 0; i < s->nb_streams; i++) { |
| type = s->streams[i]->codec->codec_type; |
| if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1 |
| /* ignore attached pictures/cover art streams */ |
| && !(s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC)) |
| type_index_map[type] = i; |
| } |
| |
| for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) { |
| type = type_priority_list[i]; |
| if ((seg->reference_stream_index = type_index_map[type]) >= 0) |
| break; |
| } |
| } else { |
| for (i = 0; i < s->nb_streams; i++) { |
| ret = avformat_match_stream_specifier(s, s->streams[i], |
| seg->reference_stream_specifier); |
| if (ret < 0) |
| return ret; |
| if (ret > 0) { |
| seg->reference_stream_index = i; |
| break; |
| } |
| } |
| } |
| |
| if (seg->reference_stream_index < 0) { |
| av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n", |
| seg->reference_stream_specifier); |
| return AVERROR(EINVAL); |
| } |
| |
| return 0; |
| } |
| |
| static void seg_free_context(SegmentContext *seg) |
| { |
| ff_format_io_close(seg->avf, &seg->list_pb); |
| avformat_free_context(seg->avf); |
| seg->avf = NULL; |
| } |
| |
| static int seg_write_header(AVFormatContext *s) |
| { |
| SegmentContext *seg = s->priv_data; |
| AVFormatContext *oc = NULL; |
| AVDictionary *options = NULL; |
| int ret; |
| int i; |
| |
| seg->segment_count = 0; |
| if (!seg->write_header_trailer) |
| seg->individual_header_trailer = 0; |
| |
| if (seg->header_filename) { |
| seg->write_header_trailer = 1; |
| seg->individual_header_trailer = 0; |
| } |
| |
| if (!!seg->time_str + !!seg->times_str + !!seg->frames_str > 1) { |
| av_log(s, AV_LOG_ERROR, |
| "segment_time, segment_times, and segment_frames options " |
| "are mutually exclusive, select just one of them\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| if (seg->times_str) { |
| if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0) |
| return ret; |
| } else if (seg->frames_str) { |
| if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0) |
| return ret; |
| } else { |
| /* set default value if not specified */ |
| if (!seg->time_str) |
| seg->time_str = av_strdup("2"); |
| if ((ret = av_parse_time(&seg->time, seg->time_str, 1)) < 0) { |
| av_log(s, AV_LOG_ERROR, |
| "Invalid time duration specification '%s' for segment_time option\n", |
| seg->time_str); |
| return ret; |
| } |
| if (seg->use_clocktime) { |
| if (seg->time <= 0) { |
| av_log(s, AV_LOG_ERROR, "Invalid negative segment_time with segment_atclocktime option set\n"); |
| return AVERROR(EINVAL); |
| } |
| seg->clocktime_offset = seg->time - (seg->clocktime_offset % seg->time); |
| } |
| } |
| |
| if (seg->format_options_str) { |
| ret = av_dict_parse_string(&seg->format_options, seg->format_options_str, "=", ":", 0); |
| if (ret < 0) { |
| av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", |
| seg->format_options_str); |
| goto fail; |
| } |
| } |
| |
| if (seg->list) { |
| if (seg->list_type == LIST_TYPE_UNDEFINED) { |
| if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV; |
| else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT; |
| else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8; |
| else if (av_match_ext(seg->list, "ffcat,ffconcat")) seg->list_type = LIST_TYPE_FFCONCAT; |
| else seg->list_type = LIST_TYPE_FLAT; |
| } |
| if (!seg->list_size && seg->list_type != LIST_TYPE_M3U8) { |
| if ((ret = segment_list_open(s)) < 0) |
| goto fail; |
| } else { |
| const char *proto = avio_find_protocol_name(s->filename); |
| seg->use_rename = proto && !strcmp(proto, "file"); |
| } |
| } |
| if (seg->list_type == LIST_TYPE_EXT) |
| av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n"); |
| |
| if ((ret = select_reference_stream(s)) < 0) |
| goto fail; |
| av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n", |
| seg->reference_stream_index, |
| av_get_media_type_string(s->streams[seg->reference_stream_index]->codec->codec_type)); |
| |
| seg->oformat = av_guess_format(seg->format, s->filename, NULL); |
| |
| if (!seg->oformat) { |
| ret = AVERROR_MUXER_NOT_FOUND; |
| goto fail; |
| } |
| if (seg->oformat->flags & AVFMT_NOFILE) { |
| av_log(s, AV_LOG_ERROR, "format %s not supported.\n", |
| seg->oformat->name); |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| |
| if ((ret = segment_mux_init(s)) < 0) |
| goto fail; |
| oc = seg->avf; |
| |
| if ((ret = set_segment_filename(s)) < 0) |
| goto fail; |
| |
| if (seg->write_header_trailer) { |
| if ((ret = s->io_open(s, &oc->pb, |
| seg->header_filename ? seg->header_filename : oc->filename, |
| AVIO_FLAG_WRITE, NULL)) < 0) { |
| av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", oc->filename); |
| goto fail; |
| } |
| if (!seg->individual_header_trailer) |
| oc->pb->seekable = 0; |
| } else { |
| if ((ret = open_null_ctx(&oc->pb)) < 0) |
| goto fail; |
| } |
| |
| av_dict_copy(&options, seg->format_options, 0); |
| ret = avformat_write_header(oc, &options); |
| if (av_dict_count(options)) { |
| av_log(s, AV_LOG_ERROR, |
| "Some of the provided format options in '%s' are not recognized\n", seg->format_options_str); |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| |
| if (ret < 0) { |
| ff_format_io_close(oc, &oc->pb); |
| goto fail; |
| } |
| seg->segment_frame_count = 0; |
| |
| av_assert0(s->nb_streams == oc->nb_streams); |
| for (i = 0; i < s->nb_streams; i++) { |
| AVStream *inner_st = oc->streams[i]; |
| AVStream *outer_st = s->streams[i]; |
| avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den); |
| } |
| |
| if (oc->avoid_negative_ts > 0 && s->avoid_negative_ts < 0) |
| s->avoid_negative_ts = 1; |
| |
| if (!seg->write_header_trailer || seg->header_filename) { |
| if (seg->header_filename) { |
| av_write_frame(oc, NULL); |
| ff_format_io_close(oc, &oc->pb); |
| } else { |
| close_null_ctxp(&oc->pb); |
| } |
| if ((ret = oc->io_open(oc, &oc->pb, oc->filename, AVIO_FLAG_WRITE, NULL)) < 0) |
| goto fail; |
| if (!seg->individual_header_trailer) |
| oc->pb->seekable = 0; |
| } |
| |
| fail: |
| av_dict_free(&options); |
| if (ret < 0) |
| seg_free_context(seg); |
| |
| return ret; |
| } |
| |
| static int seg_write_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| SegmentContext *seg = s->priv_data; |
| AVStream *st = s->streams[pkt->stream_index]; |
| int64_t end_pts = INT64_MAX, offset; |
| int start_frame = INT_MAX; |
| int ret; |
| struct tm ti; |
| int64_t usecs; |
| int64_t wrapped_val; |
| |
| if (!seg->avf) |
| return AVERROR(EINVAL); |
| |
| if (seg->times) { |
| end_pts = seg->segment_count < seg->nb_times ? |
| seg->times[seg->segment_count] : INT64_MAX; |
| } else if (seg->frames) { |
| start_frame = seg->segment_count < seg->nb_frames ? |
| seg->frames[seg->segment_count] : INT_MAX; |
| } else { |
| if (seg->use_clocktime) { |
| int64_t avgt = av_gettime(); |
| time_t sec = avgt / 1000000; |
| localtime_r(&sec, &ti); |
| usecs = (int64_t)(ti.tm_hour * 3600 + ti.tm_min * 60 + ti.tm_sec) * 1000000 + (avgt % 1000000); |
| wrapped_val = (usecs + seg->clocktime_offset) % seg->time; |
| if (seg->last_cut != usecs && wrapped_val < seg->last_val && wrapped_val < seg->clocktime_wrap_duration) { |
| seg->cut_pending = 1; |
| seg->last_cut = usecs; |
| } |
| seg->last_val = wrapped_val; |
| } else { |
| end_pts = seg->time * (seg->segment_count + 1); |
| } |
| } |
| |
| ff_dlog(s, "packet stream:%d pts:%s pts_time:%s duration_time:%s is_key:%d frame:%d\n", |
| pkt->stream_index, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), |
| av_ts2timestr(pkt->duration, &st->time_base), |
| pkt->flags & AV_PKT_FLAG_KEY, |
| pkt->stream_index == seg->reference_stream_index ? seg->frame_count : -1); |
| |
| if (pkt->stream_index == seg->reference_stream_index && |
| (pkt->flags & AV_PKT_FLAG_KEY || seg->break_non_keyframes) && |
| seg->segment_frame_count > 0 && |
| (seg->cut_pending || seg->frame_count >= start_frame || |
| (pkt->pts != AV_NOPTS_VALUE && |
| av_compare_ts(pkt->pts, st->time_base, |
| end_pts-seg->time_delta, AV_TIME_BASE_Q) >= 0))) { |
| /* sanitize end time in case last packet didn't have a defined duration */ |
| if (seg->cur_entry.last_duration == 0) |
| seg->cur_entry.end_time = (double)pkt->pts * av_q2d(st->time_base); |
| |
| if ((ret = segment_end(s, seg->individual_header_trailer, 0)) < 0) |
| goto fail; |
| |
| if ((ret = segment_start(s, seg->individual_header_trailer)) < 0) |
| goto fail; |
| |
| seg->cut_pending = 0; |
| seg->cur_entry.index = seg->segment_idx + seg->segment_idx_wrap * seg->segment_idx_wrap_nb; |
| seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base); |
| seg->cur_entry.start_pts = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q); |
| seg->cur_entry.end_time = seg->cur_entry.start_time + |
| pkt->pts != AV_NOPTS_VALUE ? (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base) : 0; |
| } else if (pkt->pts != AV_NOPTS_VALUE && pkt->stream_index == seg->reference_stream_index) { |
| seg->cur_entry.end_time = |
| FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base)); |
| seg->cur_entry.last_duration = pkt->duration; |
| } |
| |
| if (seg->segment_frame_count == 0) { |
| av_log(s, AV_LOG_VERBOSE, "segment:'%s' starts with packet stream:%d pts:%s pts_time:%s frame:%d\n", |
| seg->avf->filename, pkt->stream_index, |
| av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), seg->frame_count); |
| } |
| |
| av_log(s, AV_LOG_DEBUG, "stream:%d start_pts_time:%s pts:%s pts_time:%s dts:%s dts_time:%s", |
| pkt->stream_index, |
| av_ts2timestr(seg->cur_entry.start_pts, &AV_TIME_BASE_Q), |
| av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), |
| av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base)); |
| |
| /* compute new timestamps */ |
| offset = av_rescale_q(seg->initial_offset - (seg->reset_timestamps ? seg->cur_entry.start_pts : 0), |
| AV_TIME_BASE_Q, st->time_base); |
| if (pkt->pts != AV_NOPTS_VALUE) |
| pkt->pts += offset; |
| if (pkt->dts != AV_NOPTS_VALUE) |
| pkt->dts += offset; |
| |
| av_log(s, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n", |
| av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base), |
| av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base)); |
| |
| ret = ff_write_chained(seg->avf, pkt->stream_index, pkt, s, seg->initial_offset || seg->reset_timestamps); |
| |
| fail: |
| if (pkt->stream_index == seg->reference_stream_index) { |
| seg->frame_count++; |
| seg->segment_frame_count++; |
| } |
| |
| if (ret < 0) |
| seg_free_context(seg); |
| |
| return ret; |
| } |
| |
| static int seg_write_trailer(struct AVFormatContext *s) |
| { |
| SegmentContext *seg = s->priv_data; |
| AVFormatContext *oc = seg->avf; |
| SegmentListEntry *cur, *next; |
| int ret = 0; |
| |
| if (!oc) |
| goto fail; |
| |
| if (!seg->write_header_trailer) { |
| if ((ret = segment_end(s, 0, 1)) < 0) |
| goto fail; |
| if ((ret = open_null_ctx(&oc->pb)) < 0) |
| goto fail; |
| ret = av_write_trailer(oc); |
| close_null_ctxp(&oc->pb); |
| } else { |
| ret = segment_end(s, 1, 1); |
| } |
| fail: |
| if (seg->list) |
| ff_format_io_close(s, &seg->list_pb); |
| |
| av_dict_free(&seg->format_options); |
| av_opt_free(seg); |
| av_freep(&seg->times); |
| av_freep(&seg->frames); |
| av_freep(&seg->cur_entry.filename); |
| |
| cur = seg->segment_list_entries; |
| while (cur) { |
| next = cur->next; |
| av_freep(&cur->filename); |
| av_free(cur); |
| cur = next; |
| } |
| |
| avformat_free_context(oc); |
| seg->avf = NULL; |
| return ret; |
| } |
| |
| #define OFFSET(x) offsetof(SegmentContext, x) |
| #define E AV_OPT_FLAG_ENCODING_PARAM |
| static const AVOption options[] = { |
| { "reference_stream", "set reference stream", OFFSET(reference_stream_specifier), AV_OPT_TYPE_STRING, {.str = "auto"}, CHAR_MIN, CHAR_MAX, E }, |
| { "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, |
| { "segment_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 }, |
| { "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, |
| { "segment_header_filename", "write a single file containing the header", OFFSET(header_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, |
| |
| { "segment_list_flags","set flags affecting segment list generation", OFFSET(list_flags), AV_OPT_TYPE_FLAGS, {.i64 = SEGMENT_LIST_FLAG_CACHE }, 0, UINT_MAX, E, "list_flags"}, |
| { "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, "list_flags"}, |
| { "live", "enable live-friendly list generation (useful for HLS)", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_LIVE }, INT_MIN, INT_MAX, E, "list_flags"}, |
| |
| { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E }, |
| |
| { "segment_list_type", "set the segment list type", OFFSET(list_type), AV_OPT_TYPE_INT, {.i64 = LIST_TYPE_UNDEFINED}, -1, LIST_TYPE_NB-1, E, "list_type" }, |
| { "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, E, "list_type" }, |
| { "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, E, "list_type" }, |
| { "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, E, "list_type" }, |
| { "ffconcat", "ffconcat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FFCONCAT }, INT_MIN, INT_MAX, E, "list_type" }, |
| { "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" }, |
| { "hls", "Apple HTTP Live Streaming compatible", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, E, "list_type" }, |
| |
| { "segment_atclocktime", "set segment to be cut at clocktime", OFFSET(use_clocktime), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E}, |
| { "segment_clocktime_offset", "set segment clocktime offset", OFFSET(clocktime_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 86400000000LL, E}, |
| { "segment_clocktime_wrap_duration", "set segment clocktime wrapping duration", OFFSET(clocktime_wrap_duration), AV_OPT_TYPE_DURATION, {.i64 = INT64_MAX}, 0, INT64_MAX, E}, |
| { "segment_time", "set segment duration", OFFSET(time_str),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, |
| { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 0, E }, |
| { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E }, |
| { "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E }, |
| { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E }, |
| { "segment_list_entry_prefix", "set base url prefix for segments", OFFSET(entry_prefix), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, |
| { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E }, |
| { "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 }, |
| { "strftime", "set filename expansion with strftime at segment creation", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E }, |
| { "break_non_keyframes", "allow breaking segments on non-keyframes", OFFSET(break_non_keyframes), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E }, |
| |
| { "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E }, |
| { "write_header_trailer", "write a header to the first segment and a trailer to the last one", OFFSET(write_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E }, |
| { "reset_timestamps", "reset timestamps at the begin of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E }, |
| { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E }, |
| { NULL }, |
| }; |
| |
| static const AVClass seg_class = { |
| .class_name = "segment muxer", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| AVOutputFormat ff_segment_muxer = { |
| .name = "segment", |
| .long_name = NULL_IF_CONFIG_SMALL("segment"), |
| .priv_data_size = sizeof(SegmentContext), |
| .flags = AVFMT_NOFILE|AVFMT_GLOBALHEADER, |
| .write_header = seg_write_header, |
| .write_packet = seg_write_packet, |
| .write_trailer = seg_write_trailer, |
| .priv_class = &seg_class, |
| }; |
| |
| static const AVClass sseg_class = { |
| .class_name = "stream_segment muxer", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| AVOutputFormat ff_stream_segment_muxer = { |
| .name = "stream_segment,ssegment", |
| .long_name = NULL_IF_CONFIG_SMALL("streaming segment muxer"), |
| .priv_data_size = sizeof(SegmentContext), |
| .flags = AVFMT_NOFILE, |
| .write_header = seg_write_header, |
| .write_packet = seg_write_packet, |
| .write_trailer = seg_write_trailer, |
| .priv_class = &sseg_class, |
| }; |
