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-rw-r--r--libavformat/hlsenc.c352
1 files changed, 265 insertions, 87 deletions
diff --git a/libavformat/hlsenc.c b/libavformat/hlsenc.c
index 21c952630d..788535162a 100644
--- a/libavformat/hlsenc.c
+++ b/libavformat/hlsenc.c
@@ -2,26 +2,31 @@
* Apple HTTP Live Streaming segmenter
* Copyright (c) 2012, Luca Barbato
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * 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"
@@ -30,12 +35,22 @@
#include "avformat.h"
#include "internal.h"
+#include "os_support.h"
-typedef struct ListEntry {
- char name[1024];
- int duration;
- struct ListEntry *next;
-} ListEntry;
+typedef struct HLSSegment {
+ char filename[1024];
+ double duration; /* in seconds */
+ int64_t pos;
+ int64_t size;
+
+ 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),
+} HLSFlags;
typedef struct HLSContext {
const AVClass *class; // Class for private options.
@@ -43,35 +58,115 @@ typedef struct HLSContext {
int64_t sequence;
int64_t start_sequence;
AVOutputFormat *oformat;
+
AVFormatContext *avf;
+
float time; // Set by a private option.
- int size; // Set by a private option.
+ int max_nb_segments; // Set by a private option.
int wrap; // Set by a private option.
- int allowcache;
+ uint32_t flags; // enum HLSFlags
+ char *segment_filename;
+
+ int allowcache;
int64_t recording_time;
int has_video;
int64_t start_pts;
int64_t end_pts;
- int64_t duration; // last segment duration computed so far, in seconds
+ 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;
- ListEntry *list;
- ListEntry *end_list;
+
+ HLSSegment *segments;
+ HLSSegment *last_segment;
+ HLSSegment *old_segments;
+
char *basename;
char *baseurl;
+ char *format_options_str;
+ AVDictionary *format_options;
} HLSContext;
+static int hls_delete_old_segments(HLSContext *hls) {
+
+ HLSSegment *segment, *previous_segment = NULL;
+ float playlist_duration = 0.0f;
+ int ret = 0, path_size;
+ char *dirname = NULL, *p, *path;
+
+ 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));
+ }
+ av_free(path);
+ previous_segment = segment;
+ segment = previous_segment->next;
+ av_free(previous_segment);
+ }
+
+fail:
+ av_free(dirname);
+
+ return ret;
+}
+
static int hls_mux_init(AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
AVFormatContext *oc;
- int i;
+ int i, ret;
- hls->avf = oc = avformat_alloc_context();
- if (!oc)
- return AVERROR(ENOMEM);
+ 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;
+ av_dict_copy(&oc->metadata, s->metadata, 0);
for (i = 0; i < s->nb_streams; i++) {
AVStream *st;
@@ -81,33 +176,46 @@ static int hls_mux_init(AVFormatContext *s)
st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
st->time_base = s->streams[i]->time_base;
}
+ hls->start_pos = 0;
return 0;
}
-static int append_entry(HLSContext *hls, uint64_t duration)
+/* 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)
{
- ListEntry *en = av_malloc(sizeof(*en));
+ HLSSegment *en = av_malloc(sizeof(*en));
+ int ret;
if (!en)
return AVERROR(ENOMEM);
- av_strlcpy(en->name, av_basename(hls->avf->filename), sizeof(en->name));
+ av_strlcpy(en->filename, av_basename(hls->avf->filename), sizeof(en->filename));
en->duration = duration;
+ en->pos = pos;
+ en->size = size;
en->next = NULL;
- if (!hls->list)
- hls->list = en;
+ if (!hls->segments)
+ hls->segments = en;
else
- hls->end_list->next = en;
-
- hls->end_list = en;
-
- if (hls->nb_entries >= hls->size) {
- en = hls->list;
- hls->list = en->next;
- av_free(en);
+ 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++;
@@ -116,9 +224,9 @@ static int append_entry(HLSContext *hls, uint64_t duration)
return 0;
}
-static void free_entries(HLSContext *hls)
+static void hls_free_segments(HLSSegment *p)
{
- ListEntry *p = hls->list, *en;
+ HLSSegment *en;
while(p) {
en = p;
@@ -130,25 +238,32 @@ static void free_entries(HLSContext *hls)
static int hls_window(AVFormatContext *s, int last)
{
HLSContext *hls = s->priv_data;
- ListEntry *en;
+ HLSSegment *en;
int target_duration = 0;
int ret = 0;
AVIOContext *out = NULL;
char temp_filename[1024];
- int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->size);
+ 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;
+
+ 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");
- snprintf(temp_filename, sizeof(temp_filename), "%s.tmp", s->filename);
+ snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
if ((ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE,
&s->interrupt_callback, NULL)) < 0)
goto fail;
- for (en = hls->list; en; en = en->next) {
+ for (en = hls->segments; en; en = en->next) {
if (target_duration < en->duration)
- target_duration = en->duration;
+ target_duration = ceil(en->duration);
}
avio_printf(out, "#EXTM3U\n");
- avio_printf(out, "#EXT-X-VERSION:3\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");
}
@@ -158,11 +273,14 @@ static int hls_window(AVFormatContext *s, int last)
av_log(s, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n",
sequence);
- for (en = hls->list; en; en = en->next) {
- avio_printf(out, "#EXTINF:%d,\n", en->duration);
+ for (en = hls->segments; en; en = en->next) {
+ 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->name);
+ avio_printf(out, "%s\n", en->filename);
}
if (last)
@@ -170,8 +288,8 @@ static int hls_window(AVFormatContext *s, int last)
fail:
avio_closep(&out);
- if (ret >= 0)
- ff_rename(temp_filename, s->filename);
+ if (ret >= 0 && use_rename)
+ ff_rename(temp_filename, s->filename, s);
return ret;
}
@@ -181,9 +299,15 @@ static int hls_start(AVFormatContext *s)
AVFormatContext *oc = c->avf;
int err = 0;
- if (av_get_frame_filename(oc->filename, sizeof(oc->filename),
- c->basename, c->wrap ? c->sequence % c->wrap : c->sequence) < 0)
- return AVERROR(EINVAL);
+ if (c->flags & HLS_SINGLE_FILE)
+ av_strlcpy(oc->filename, c->basename,
+ sizeof(oc->filename));
+ 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'\n", c->basename);
+ return AVERROR(EINVAL);
+ }
c->number++;
if ((err = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
@@ -202,12 +326,21 @@ static int hls_write_header(AVFormatContext *s)
int ret, i;
char *p;
const char *pattern = "%d.ts";
- int basename_size = strlen(s->filename) + strlen(pattern) + 1;
+ AVDictionary *options = NULL;
+ int 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;
@@ -224,35 +357,55 @@ static int hls_write_header(AVFormatContext *s)
goto fail;
}
- hls->basename = av_malloc(basename_size);
-
- if (!hls->basename) {
- ret = AVERROR(ENOMEM);
- 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";
+
+ 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';
+ av_strlcat(hls->basename, pattern, basename_size);
}
- strcpy(hls->basename, s->filename);
-
- p = strrchr(hls->basename, '.');
-
- if (p)
- *p = '\0';
-
- av_strlcat(hls->basename, pattern, basename_size);
-
if ((ret = hls_mux_init(s)) < 0)
goto fail;
if ((ret = hls_start(s)) < 0)
goto fail;
- if ((ret = avformat_write_header(hls->avf, NULL)) < 0)
- return ret;
-
-
+ 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 = hls->avf->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);
+ }
fail:
- if (ret) {
- av_free(hls->basename);
+
+ av_dict_free(&options);
+ if (ret < 0) {
+ av_freep(&hls->basename);
if (hls->avf)
avformat_free_context(hls->avf);
}
@@ -265,6 +418,7 @@ static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
AVFormatContext *oc = hls->avf;
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;
if (hls->start_pts == AV_NOPTS_VALUE) {
@@ -275,28 +429,41 @@ static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
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)
- can_split = 0;
- else
- hls->duration = av_rescale(pkt->pts - hls->end_pts,
- st->time_base.num, st->time_base.den);
+ 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) {
- ret = append_entry(hls, hls->duration);
- if (ret)
+ 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;
- av_write_frame(oc, NULL); /* Flush any buffered data */
- avio_close(oc->pb);
+ 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 {
+ avio_closep(&oc->pb);
- ret = hls_start(s);
+ ret = hls_start(s);
+ }
- if (ret)
+ if (ret < 0)
return ret;
oc = hls->avf;
@@ -305,7 +472,7 @@ static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
return ret;
}
- ret = ff_write_chained(oc, pkt->stream_index, pkt, s);
+ ret = ff_write_chained(oc, pkt->stream_index, pkt, s, 0);
return ret;
}
@@ -316,25 +483,36 @@ static int hls_write_trailer(struct AVFormatContext *s)
AVFormatContext *oc = hls->avf;
av_write_trailer(oc);
- avio_closep(&oc->pb);
+ if (oc->pb) {
+ hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
+ avio_closep(&oc->pb);
+ hls_append_segment(hls, hls->duration, hls->start_pos, hls->size);
+ }
+ av_freep(&hls->basename);
avformat_free_context(oc);
- av_free(hls->basename);
- append_entry(hls, hls->duration);
+ hls->avf = NULL;
hls_window(s, 1);
- free_entries(hls);
+ 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", "first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
- {"hls_time", "segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
- {"hls_list_size", "maximum number of playlist entries", OFFSET(size), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
- {"hls_wrap", "number after which the index wraps", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
+ {"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_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_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"},
+
{ NULL },
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 20:18:58 +0000