| /* |
| * Apple HTTP Live Streaming segmenter |
| * Copyright (c) 2012, 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 |
| */ |
| |
| #include "config.h" |
| #include <float.h> |
| #include <stdint.h> |
| #if HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| |
| #include "libavutil/avassert.h" |
| #include "libavutil/mathematics.h" |
| #include "libavutil/parseutils.h" |
| #include "libavutil/avstring.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/log.h" |
| #include "libavutil/time_internal.h" |
| |
| #include "avformat.h" |
| #include "avio_internal.h" |
| #include "internal.h" |
| #include "os_support.h" |
| |
| #define KEYSIZE 16 |
| #define LINE_BUFFER_SIZE 1024 |
| |
| typedef struct HLSSegment { |
| char filename[1024]; |
| char sub_filename[1024]; |
| double duration; /* in seconds */ |
| int64_t pos; |
| int64_t size; |
| |
| char key_uri[LINE_BUFFER_SIZE + 1]; |
| char iv_string[KEYSIZE*2 + 1]; |
| |
| struct HLSSegment *next; |
| } HLSSegment; |
| |
| typedef enum HLSFlags { |
| // Generate a single media file and use byte ranges in the playlist. |
| HLS_SINGLE_FILE = (1 << 0), |
| HLS_DELETE_SEGMENTS = (1 << 1), |
| HLS_ROUND_DURATIONS = (1 << 2), |
| HLS_DISCONT_START = (1 << 3), |
| HLS_OMIT_ENDLIST = (1 << 4), |
| } HLSFlags; |
| |
| typedef struct HLSContext { |
| const AVClass *class; // Class for private options. |
| unsigned number; |
| int64_t sequence; |
| int64_t start_sequence; |
| AVOutputFormat *oformat; |
| AVOutputFormat *vtt_oformat; |
| |
| AVFormatContext *avf; |
| AVFormatContext *vtt_avf; |
| |
| float time; // Set by a private option. |
| int max_nb_segments; // Set by a private option. |
| int wrap; // Set by a private option. |
| uint32_t flags; // enum HLSFlags |
| char *segment_filename; |
| |
| int use_localtime; ///< flag to expand filename with localtime |
| int allowcache; |
| int64_t recording_time; |
| int has_video; |
| int has_subtitle; |
| int64_t start_pts; |
| int64_t end_pts; |
| double duration; // last segment duration computed so far, in seconds |
| int64_t start_pos; // last segment starting position |
| int64_t size; // last segment size |
| int nb_entries; |
| int discontinuity_set; |
| |
| HLSSegment *segments; |
| HLSSegment *last_segment; |
| HLSSegment *old_segments; |
| |
| char *basename; |
| char *vtt_basename; |
| char *vtt_m3u8_name; |
| char *baseurl; |
| char *format_options_str; |
| char *vtt_format_options_str; |
| char *subtitle_filename; |
| AVDictionary *format_options; |
| |
| char *key_info_file; |
| char key_file[LINE_BUFFER_SIZE + 1]; |
| char key_uri[LINE_BUFFER_SIZE + 1]; |
| char key_string[KEYSIZE*2 + 1]; |
| char iv_string[KEYSIZE*2 + 1]; |
| AVDictionary *vtt_format_options; |
| |
| char *method; |
| |
| } HLSContext; |
| |
| static int hls_delete_old_segments(HLSContext *hls) { |
| |
| HLSSegment *segment, *previous_segment = NULL; |
| float playlist_duration = 0.0f; |
| int ret = 0, path_size, sub_path_size; |
| char *dirname = NULL, *p, *sub_path; |
| char *path = NULL; |
| |
| segment = hls->segments; |
| while (segment) { |
| playlist_duration += segment->duration; |
| segment = segment->next; |
| } |
| |
| segment = hls->old_segments; |
| while (segment) { |
| playlist_duration -= segment->duration; |
| previous_segment = segment; |
| segment = previous_segment->next; |
| if (playlist_duration <= -previous_segment->duration) { |
| previous_segment->next = NULL; |
| break; |
| } |
| } |
| |
| if (segment) { |
| if (hls->segment_filename) { |
| dirname = av_strdup(hls->segment_filename); |
| } else { |
| dirname = av_strdup(hls->avf->filename); |
| } |
| if (!dirname) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| p = (char *)av_basename(dirname); |
| *p = '\0'; |
| } |
| |
| while (segment) { |
| av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n", |
| segment->filename); |
| path_size = strlen(dirname) + strlen(segment->filename) + 1; |
| path = av_malloc(path_size); |
| if (!path) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| |
| av_strlcpy(path, dirname, path_size); |
| av_strlcat(path, segment->filename, path_size); |
| if (unlink(path) < 0) { |
| av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n", |
| path, strerror(errno)); |
| } |
| |
| if (segment->sub_filename[0] != '\0') { |
| sub_path_size = strlen(dirname) + strlen(segment->sub_filename) + 1; |
| sub_path = av_malloc(sub_path_size); |
| if (!sub_path) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| |
| av_strlcpy(sub_path, dirname, sub_path_size); |
| av_strlcat(sub_path, segment->sub_filename, sub_path_size); |
| if (unlink(sub_path) < 0) { |
| av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n", |
| sub_path, strerror(errno)); |
| } |
| av_free(sub_path); |
| } |
| av_freep(&path); |
| previous_segment = segment; |
| segment = previous_segment->next; |
| av_free(previous_segment); |
| } |
| |
| fail: |
| av_free(path); |
| av_free(dirname); |
| |
| return ret; |
| } |
| |
| static int hls_encryption_start(AVFormatContext *s) |
| { |
| HLSContext *hls = s->priv_data; |
| int ret; |
| AVIOContext *pb; |
| uint8_t key[KEYSIZE]; |
| |
| if ((ret = s->io_open(s, &pb, hls->key_info_file, AVIO_FLAG_READ, NULL)) < 0) { |
| av_log(hls, AV_LOG_ERROR, |
| "error opening key info file %s\n", hls->key_info_file); |
| return ret; |
| } |
| |
| ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri)); |
| hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0'; |
| |
| ff_get_line(pb, hls->key_file, sizeof(hls->key_file)); |
| hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0'; |
| |
| ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string)); |
| hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0'; |
| |
| ff_format_io_close(s, &pb); |
| |
| if (!*hls->key_uri) { |
| av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| if (!*hls->key_file) { |
| av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| if ((ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_READ, NULL)) < 0) { |
| av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file); |
| return ret; |
| } |
| |
| ret = avio_read(pb, key, sizeof(key)); |
| ff_format_io_close(s, &pb); |
| if (ret != sizeof(key)) { |
| av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file); |
| if (ret >= 0 || ret == AVERROR_EOF) |
| ret = AVERROR(EINVAL); |
| return ret; |
| } |
| ff_data_to_hex(hls->key_string, key, sizeof(key), 0); |
| |
| return 0; |
| } |
| |
| static int hls_mux_init(AVFormatContext *s) |
| { |
| HLSContext *hls = s->priv_data; |
| AVFormatContext *oc; |
| AVFormatContext *vtt_oc = NULL; |
| int i, ret; |
| |
| ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL); |
| if (ret < 0) |
| return ret; |
| oc = hls->avf; |
| |
| oc->oformat = hls->oformat; |
| oc->interrupt_callback = s->interrupt_callback; |
| oc->max_delay = s->max_delay; |
| oc->opaque = s->opaque; |
| oc->io_open = s->io_open; |
| oc->io_close = s->io_close; |
| av_dict_copy(&oc->metadata, s->metadata, 0); |
| |
| if(hls->vtt_oformat) { |
| ret = avformat_alloc_output_context2(&hls->vtt_avf, hls->vtt_oformat, NULL, NULL); |
| if (ret < 0) |
| return ret; |
| vtt_oc = hls->vtt_avf; |
| vtt_oc->oformat = hls->vtt_oformat; |
| av_dict_copy(&vtt_oc->metadata, s->metadata, 0); |
| } |
| |
| for (i = 0; i < s->nb_streams; i++) { |
| AVStream *st; |
| AVFormatContext *loc; |
| if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) |
| loc = vtt_oc; |
| else |
| loc = oc; |
| |
| if (!(st = avformat_new_stream(loc, NULL))) |
| return AVERROR(ENOMEM); |
| avcodec_copy_context(st->codec, s->streams[i]->codec); |
| st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio; |
| st->time_base = s->streams[i]->time_base; |
| } |
| hls->start_pos = 0; |
| |
| return 0; |
| } |
| |
| /* Create a new segment and append it to the segment list */ |
| static int hls_append_segment(HLSContext *hls, double duration, int64_t pos, |
| int64_t size) |
| { |
| HLSSegment *en = av_malloc(sizeof(*en)); |
| int ret; |
| |
| if (!en) |
| return AVERROR(ENOMEM); |
| |
| av_strlcpy(en->filename, av_basename(hls->avf->filename), sizeof(en->filename)); |
| |
| if(hls->has_subtitle) |
| av_strlcpy(en->sub_filename, av_basename(hls->vtt_avf->filename), sizeof(en->sub_filename)); |
| else |
| en->sub_filename[0] = '\0'; |
| |
| en->duration = duration; |
| en->pos = pos; |
| en->size = size; |
| en->next = NULL; |
| |
| if (hls->key_info_file) { |
| av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri)); |
| av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string)); |
| } |
| |
| if (!hls->segments) |
| hls->segments = en; |
| else |
| hls->last_segment->next = en; |
| |
| hls->last_segment = en; |
| |
| if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) { |
| en = hls->segments; |
| hls->segments = en->next; |
| if (en && hls->flags & HLS_DELETE_SEGMENTS && |
| !(hls->flags & HLS_SINGLE_FILE || hls->wrap)) { |
| en->next = hls->old_segments; |
| hls->old_segments = en; |
| if ((ret = hls_delete_old_segments(hls)) < 0) |
| return ret; |
| } else |
| av_free(en); |
| } else |
| hls->nb_entries++; |
| |
| hls->sequence++; |
| |
| return 0; |
| } |
| |
| static void hls_free_segments(HLSSegment *p) |
| { |
| HLSSegment *en; |
| |
| while(p) { |
| en = p; |
| p = p->next; |
| av_free(en); |
| } |
| } |
| |
| static void set_http_options(AVDictionary **options, HLSContext *c) |
| { |
| if (c->method) |
| av_dict_set(options, "method", c->method, 0); |
| } |
| |
| static int hls_window(AVFormatContext *s, int last) |
| { |
| HLSContext *hls = s->priv_data; |
| HLSSegment *en; |
| int target_duration = 0; |
| int ret = 0; |
| AVIOContext *out = NULL; |
| AVIOContext *sub_out = NULL; |
| char temp_filename[1024]; |
| int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries); |
| int version = hls->flags & HLS_SINGLE_FILE ? 4 : 3; |
| const char *proto = avio_find_protocol_name(s->filename); |
| int use_rename = proto && !strcmp(proto, "file"); |
| static unsigned warned_non_file; |
| char *key_uri = NULL; |
| char *iv_string = NULL; |
| AVDictionary *options = NULL; |
| |
| if (!use_rename && !warned_non_file++) |
| av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporarly partial files\n"); |
| |
| set_http_options(&options, hls); |
| snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename); |
| if ((ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, NULL)) < 0) |
| goto fail; |
| |
| for (en = hls->segments; en; en = en->next) { |
| if (target_duration < en->duration) |
| target_duration = ceil(en->duration); |
| } |
| |
| hls->discontinuity_set = 0; |
| avio_printf(out, "#EXTM3U\n"); |
| avio_printf(out, "#EXT-X-VERSION:%d\n", version); |
| if (hls->allowcache == 0 || hls->allowcache == 1) { |
| avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES"); |
| } |
| avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration); |
| avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence); |
| |
| av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", |
| sequence); |
| if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){ |
| avio_printf(out, "#EXT-X-DISCONTINUITY\n"); |
| hls->discontinuity_set = 1; |
| } |
| for (en = hls->segments; en; en = en->next) { |
| if (hls->key_info_file && (!key_uri || strcmp(en->key_uri, key_uri) || |
| av_strcasecmp(en->iv_string, iv_string))) { |
| avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri); |
| if (*en->iv_string) |
| avio_printf(out, ",IV=0x%s", en->iv_string); |
| avio_printf(out, "\n"); |
| key_uri = en->key_uri; |
| iv_string = en->iv_string; |
| } |
| |
| if (hls->flags & HLS_ROUND_DURATIONS) |
| avio_printf(out, "#EXTINF:%ld,\n", lrint(en->duration)); |
| else |
| avio_printf(out, "#EXTINF:%f,\n", en->duration); |
| if (hls->flags & HLS_SINGLE_FILE) |
| avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n", |
| en->size, en->pos); |
| if (hls->baseurl) |
| avio_printf(out, "%s", hls->baseurl); |
| avio_printf(out, "%s\n", en->filename); |
| } |
| |
| if (last && (hls->flags & HLS_OMIT_ENDLIST)==0) |
| avio_printf(out, "#EXT-X-ENDLIST\n"); |
| |
| if( hls->vtt_m3u8_name ) { |
| if ((ret = s->io_open(s, &sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE, &options)) < 0) |
| goto fail; |
| avio_printf(sub_out, "#EXTM3U\n"); |
| avio_printf(sub_out, "#EXT-X-VERSION:%d\n", version); |
| if (hls->allowcache == 0 || hls->allowcache == 1) { |
| avio_printf(sub_out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES"); |
| } |
| avio_printf(sub_out, "#EXT-X-TARGETDURATION:%d\n", target_duration); |
| avio_printf(sub_out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence); |
| |
| av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", |
| sequence); |
| |
| for (en = hls->segments; en; en = en->next) { |
| avio_printf(sub_out, "#EXTINF:%f,\n", en->duration); |
| if (hls->flags & HLS_SINGLE_FILE) |
| avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n", |
| en->size, en->pos); |
| if (hls->baseurl) |
| avio_printf(sub_out, "%s", hls->baseurl); |
| avio_printf(sub_out, "%s\n", en->sub_filename); |
| } |
| |
| if (last) |
| avio_printf(sub_out, "#EXT-X-ENDLIST\n"); |
| |
| } |
| |
| fail: |
| av_dict_free(&options); |
| ff_format_io_close(s, &out); |
| ff_format_io_close(s, &sub_out); |
| if (ret >= 0 && use_rename) |
| ff_rename(temp_filename, s->filename, s); |
| return ret; |
| } |
| |
| static int hls_start(AVFormatContext *s) |
| { |
| HLSContext *c = s->priv_data; |
| AVFormatContext *oc = c->avf; |
| AVFormatContext *vtt_oc = c->vtt_avf; |
| AVDictionary *options = NULL; |
| char *filename, iv_string[KEYSIZE*2 + 1]; |
| int err = 0; |
| |
| if (c->flags & HLS_SINGLE_FILE) { |
| av_strlcpy(oc->filename, c->basename, |
| sizeof(oc->filename)); |
| if (c->vtt_basename) |
| av_strlcpy(vtt_oc->filename, c->vtt_basename, |
| sizeof(vtt_oc->filename)); |
| } else { |
| if (c->use_localtime) { |
| time_t now0; |
| struct tm *tm, tmpbuf; |
| time(&now0); |
| tm = localtime_r(&now0, &tmpbuf); |
| if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) { |
| av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n"); |
| return AVERROR(EINVAL); |
| } |
| } else if (av_get_frame_filename(oc->filename, sizeof(oc->filename), |
| c->basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) { |
| av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try use -use_localtime 1 with it\n", c->basename); |
| return AVERROR(EINVAL); |
| } |
| if( c->vtt_basename) { |
| if (av_get_frame_filename(vtt_oc->filename, sizeof(vtt_oc->filename), |
| c->vtt_basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0) { |
| av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename); |
| return AVERROR(EINVAL); |
| } |
| } |
| } |
| c->number++; |
| |
| set_http_options(&options, c); |
| |
| if (c->key_info_file) { |
| if ((err = hls_encryption_start(s)) < 0) |
| goto fail; |
| if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0)) |
| < 0) |
| goto fail; |
| err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string)); |
| if (!err) |
| snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence); |
| if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0) |
| goto fail; |
| |
| filename = av_asprintf("crypto:%s", oc->filename); |
| if (!filename) { |
| err = AVERROR(ENOMEM); |
| goto fail; |
| } |
| err = s->io_open(s, &oc->pb, filename, AVIO_FLAG_WRITE, &options); |
| av_free(filename); |
| av_dict_free(&options); |
| if (err < 0) |
| return err; |
| } else |
| if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, &options)) < 0) |
| goto fail; |
| if (c->vtt_basename) { |
| set_http_options(&options, c); |
| if ((err = s->io_open(s, &vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE, &options)) < 0) |
| goto fail; |
| } |
| av_dict_free(&options); |
| |
| /* We only require one PAT/PMT per segment. */ |
| if (oc->oformat->priv_class && oc->priv_data) { |
| char period[21]; |
| |
| snprintf(period, sizeof(period), "%d", (INT_MAX / 2) - 1); |
| |
| av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0); |
| av_opt_set(oc->priv_data, "sdt_period", period, 0); |
| av_opt_set(oc->priv_data, "pat_period", period, 0); |
| } |
| |
| if (c->vtt_basename) { |
| err = avformat_write_header(vtt_oc,NULL); |
| if (err < 0) |
| return err; |
| } |
| |
| return 0; |
| fail: |
| av_dict_free(&options); |
| |
| return err; |
| } |
| |
| static int hls_write_header(AVFormatContext *s) |
| { |
| HLSContext *hls = s->priv_data; |
| int ret, i; |
| char *p; |
| const char *pattern = "%d.ts"; |
| const char *pattern_localtime_fmt = "-%s.ts"; |
| const char *vtt_pattern = "%d.vtt"; |
| AVDictionary *options = NULL; |
| int basename_size; |
| int vtt_basename_size; |
| |
| hls->sequence = hls->start_sequence; |
| hls->recording_time = hls->time * AV_TIME_BASE; |
| hls->start_pts = AV_NOPTS_VALUE; |
| |
| if (hls->format_options_str) { |
| ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0); |
| if (ret < 0) { |
| av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str); |
| goto fail; |
| } |
| } |
| |
| for (i = 0; i < s->nb_streams; i++) { |
| hls->has_video += |
| s->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO; |
| hls->has_subtitle += |
| s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE; |
| } |
| |
| if (hls->has_video > 1) |
| av_log(s, AV_LOG_WARNING, |
| "More than a single video stream present, " |
| "expect issues decoding it.\n"); |
| |
| hls->oformat = av_guess_format("mpegts", NULL, NULL); |
| |
| if (!hls->oformat) { |
| ret = AVERROR_MUXER_NOT_FOUND; |
| goto fail; |
| } |
| |
| if(hls->has_subtitle) { |
| hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL); |
| if (!hls->oformat) { |
| ret = AVERROR_MUXER_NOT_FOUND; |
| goto fail; |
| } |
| } |
| |
| if (hls->segment_filename) { |
| hls->basename = av_strdup(hls->segment_filename); |
| if (!hls->basename) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| } else { |
| if (hls->flags & HLS_SINGLE_FILE) |
| pattern = ".ts"; |
| |
| if (hls->use_localtime) { |
| basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1; |
| } else { |
| basename_size = strlen(s->filename) + strlen(pattern) + 1; |
| } |
| hls->basename = av_malloc(basename_size); |
| if (!hls->basename) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| |
| av_strlcpy(hls->basename, s->filename, basename_size); |
| |
| p = strrchr(hls->basename, '.'); |
| if (p) |
| *p = '\0'; |
| if (hls->use_localtime) { |
| av_strlcat(hls->basename, pattern_localtime_fmt, basename_size); |
| } else { |
| av_strlcat(hls->basename, pattern, basename_size); |
| } |
| } |
| |
| if(hls->has_subtitle) { |
| |
| if (hls->flags & HLS_SINGLE_FILE) |
| vtt_pattern = ".vtt"; |
| vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1; |
| hls->vtt_basename = av_malloc(vtt_basename_size); |
| if (!hls->vtt_basename) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| hls->vtt_m3u8_name = av_malloc(vtt_basename_size); |
| if (!hls->vtt_m3u8_name ) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size); |
| p = strrchr(hls->vtt_basename, '.'); |
| if (p) |
| *p = '\0'; |
| |
| if( hls->subtitle_filename ) { |
| strcpy(hls->vtt_m3u8_name, hls->subtitle_filename); |
| } else { |
| strcpy(hls->vtt_m3u8_name, hls->vtt_basename); |
| av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size); |
| } |
| av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size); |
| } |
| |
| if ((ret = hls_mux_init(s)) < 0) |
| goto fail; |
| |
| if ((ret = hls_start(s)) < 0) |
| goto fail; |
| |
| av_dict_copy(&options, hls->format_options, 0); |
| ret = avformat_write_header(hls->avf, &options); |
| if (av_dict_count(options)) { |
| av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str); |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| //av_assert0(s->nb_streams == hls->avf->nb_streams); |
| for (i = 0; i < s->nb_streams; i++) { |
| AVStream *inner_st; |
| AVStream *outer_st = s->streams[i]; |
| if (outer_st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) |
| inner_st = hls->avf->streams[i]; |
| else if (hls->vtt_avf) |
| inner_st = hls->vtt_avf->streams[0]; |
| else { |
| /* We have a subtitle stream, when the user does not want one */ |
| inner_st = NULL; |
| continue; |
| } |
| avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den); |
| } |
| fail: |
| |
| av_dict_free(&options); |
| if (ret < 0) { |
| av_freep(&hls->basename); |
| av_freep(&hls->vtt_basename); |
| if (hls->avf) |
| avformat_free_context(hls->avf); |
| if (hls->vtt_avf) |
| avformat_free_context(hls->vtt_avf); |
| |
| } |
| return ret; |
| } |
| |
| static int hls_write_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| HLSContext *hls = s->priv_data; |
| AVFormatContext *oc = NULL; |
| AVStream *st = s->streams[pkt->stream_index]; |
| int64_t end_pts = hls->recording_time * hls->number; |
| int is_ref_pkt = 1; |
| int ret, can_split = 1; |
| int stream_index = 0; |
| |
| if( st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE ) { |
| oc = hls->vtt_avf; |
| stream_index = 0; |
| } else { |
| oc = hls->avf; |
| stream_index = pkt->stream_index; |
| } |
| if (hls->start_pts == AV_NOPTS_VALUE) { |
| hls->start_pts = pkt->pts; |
| hls->end_pts = pkt->pts; |
| } |
| |
| if (hls->has_video) { |
| can_split = st->codec->codec_type == AVMEDIA_TYPE_VIDEO && |
| pkt->flags & AV_PKT_FLAG_KEY; |
| is_ref_pkt = st->codec->codec_type == AVMEDIA_TYPE_VIDEO; |
| } |
| if (pkt->pts == AV_NOPTS_VALUE) |
| is_ref_pkt = can_split = 0; |
| |
| if (is_ref_pkt) |
| hls->duration = (double)(pkt->pts - hls->end_pts) |
| * st->time_base.num / st->time_base.den; |
| |
| if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base, |
| end_pts, AV_TIME_BASE_Q) >= 0) { |
| int64_t new_start_pos; |
| av_write_frame(oc, NULL); /* Flush any buffered data */ |
| |
| new_start_pos = avio_tell(hls->avf->pb); |
| hls->size = new_start_pos - hls->start_pos; |
| ret = hls_append_segment(hls, hls->duration, hls->start_pos, hls->size); |
| hls->start_pos = new_start_pos; |
| if (ret < 0) |
| return ret; |
| |
| hls->end_pts = pkt->pts; |
| hls->duration = 0; |
| |
| if (hls->flags & HLS_SINGLE_FILE) { |
| if (hls->avf->oformat->priv_class && hls->avf->priv_data) |
| av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0); |
| hls->number++; |
| } else { |
| ff_format_io_close(s, &oc->pb); |
| if (hls->vtt_avf) |
| ff_format_io_close(s, &hls->vtt_avf->pb); |
| |
| ret = hls_start(s); |
| } |
| |
| if (ret < 0) |
| return ret; |
| |
| if( st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE ) |
| oc = hls->vtt_avf; |
| else |
| oc = hls->avf; |
| |
| if ((ret = hls_window(s, 0)) < 0) |
| return ret; |
| } |
| |
| ret = ff_write_chained(oc, stream_index, pkt, s, 0); |
| |
| return ret; |
| } |
| |
| static int hls_write_trailer(struct AVFormatContext *s) |
| { |
| HLSContext *hls = s->priv_data; |
| AVFormatContext *oc = hls->avf; |
| AVFormatContext *vtt_oc = hls->vtt_avf; |
| |
| av_write_trailer(oc); |
| if (oc->pb) { |
| hls->size = avio_tell(hls->avf->pb) - hls->start_pos; |
| ff_format_io_close(s, &oc->pb); |
| hls_append_segment(hls, hls->duration, hls->start_pos, hls->size); |
| } |
| |
| if (vtt_oc) { |
| if (vtt_oc->pb) |
| av_write_trailer(vtt_oc); |
| hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos; |
| ff_format_io_close(s, &vtt_oc->pb); |
| } |
| av_freep(&hls->basename); |
| avformat_free_context(oc); |
| |
| if (vtt_oc) { |
| av_freep(&hls->vtt_basename); |
| av_freep(&hls->vtt_m3u8_name); |
| avformat_free_context(vtt_oc); |
| } |
| |
| hls->avf = NULL; |
| hls_window(s, 1); |
| |
| hls_free_segments(hls->segments); |
| hls_free_segments(hls->old_segments); |
| return 0; |
| } |
| |
| #define OFFSET(x) offsetof(HLSContext, x) |
| #define E AV_OPT_FLAG_ENCODING_PARAM |
| static const AVOption options[] = { |
| {"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E}, |
| {"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E}, |
| {"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E}, |
| {"hls_ts_options","set hls mpegts list of options for the container format used for hls", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E}, |
| {"hls_vtt_options","set hls vtt list of options for the container format used for hls", OFFSET(vtt_format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E}, |
| {"hls_wrap", "set number after which the index wraps", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E}, |
| {"hls_allow_cache", "explicitly set whether the client MAY (1) or MUST NOT (0) cache media segments", OFFSET(allowcache), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, E}, |
| {"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E}, |
| {"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E}, |
| {"hls_key_info_file", "file with key URI and key file path", OFFSET(key_info_file), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E}, |
| {"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E}, |
| {"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"}, |
| {"single_file", "generate a single media file indexed with byte ranges", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SINGLE_FILE }, 0, UINT_MAX, E, "flags"}, |
| {"delete_segments", "delete segment files that are no longer part of the playlist", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DELETE_SEGMENTS }, 0, UINT_MAX, E, "flags"}, |
| {"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"}, |
| {"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"}, |
| {"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"}, |
| { "use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E }, |
| {"method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E}, |
| |
| { NULL }, |
| }; |
| |
| static const AVClass hls_class = { |
| .class_name = "hls muxer", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| |
| AVOutputFormat ff_hls_muxer = { |
| .name = "hls", |
| .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"), |
| .extensions = "m3u8", |
| .priv_data_size = sizeof(HLSContext), |
| .audio_codec = AV_CODEC_ID_AAC, |
| .video_codec = AV_CODEC_ID_H264, |
| .subtitle_codec = AV_CODEC_ID_WEBVTT, |
| .flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH, |
| .write_header = hls_write_header, |
| .write_packet = hls_write_packet, |
| .write_trailer = hls_write_trailer, |
| .priv_class = &hls_class, |
| }; |
