[FFmpeg-devel] [PATCH v5 1/2] avformat/hlsenc: Modularized playlist creation to allow reuse
Karthick J
kjeyapal at akamai.com
Sat Nov 25 05:46:04 EET 2017
---
libavformat/Makefile | 2 +-
libavformat/hlsenc.c | 115 +++++++-------------------------------
libavformat/hlsplaylist.c | 138 ++++++++++++++++++++++++++++++++++++++++++++++
libavformat/hlsplaylist.h | 51 +++++++++++++++++
4 files changed, 211 insertions(+), 95 deletions(-)
create mode 100644 libavformat/hlsplaylist.c
create mode 100644 libavformat/hlsplaylist.h
diff --git a/libavformat/Makefile b/libavformat/Makefile
index b1e7b19..fd8b9f9 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -215,7 +215,7 @@ OBJS-$(CONFIG_HDS_MUXER) += hdsenc.o
OBJS-$(CONFIG_HEVC_DEMUXER) += hevcdec.o rawdec.o
OBJS-$(CONFIG_HEVC_MUXER) += rawenc.o
OBJS-$(CONFIG_HLS_DEMUXER) += hls.o
-OBJS-$(CONFIG_HLS_MUXER) += hlsenc.o
+OBJS-$(CONFIG_HLS_MUXER) += hlsenc.o hlsplaylist.o
OBJS-$(CONFIG_HNM_DEMUXER) += hnm.o
OBJS-$(CONFIG_ICO_DEMUXER) += icodec.o
OBJS-$(CONFIG_ICO_MUXER) += icoenc.o
diff --git a/libavformat/hlsenc.c b/libavformat/hlsenc.c
index 30ccf73..7c759a8 100644
--- a/libavformat/hlsenc.c
+++ b/libavformat/hlsenc.c
@@ -45,6 +45,7 @@
#include "avformat.h"
#include "avio_internal.h"
+#include "hlsplaylist.h"
#include "internal.h"
#include "os_support.h"
@@ -96,13 +97,6 @@ typedef enum {
SEGMENT_TYPE_FMP4,
} SegmentType;
-typedef enum {
- PLAYLIST_TYPE_NONE,
- PLAYLIST_TYPE_EVENT,
- PLAYLIST_TYPE_VOD,
- PLAYLIST_TYPE_NB,
-} PlaylistType;
-
typedef struct VariantStream {
unsigned number;
int64_t sequence;
@@ -1023,19 +1017,6 @@ static void hls_free_segments(HLSSegment *p)
}
}
-static void write_m3u8_head_block(HLSContext *hls, AVIOContext *out, int version,
- int target_duration, int64_t sequence)
-{
- 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(hls, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
-}
-
static void hls_rename_temp_file(AVFormatContext *s, AVFormatContext *oc)
{
size_t len = strlen(oc->filename);
@@ -1101,8 +1082,7 @@ static int create_master_playlist(AVFormatContext *s,
goto fail;
}
- avio_printf(master_pb, "#EXTM3U\n");
- avio_printf(master_pb, "#EXT-X-VERSION:%d\n", hls->version);
+ ff_hls_write_playlist_version(master_pb, hls->version);
/* For variant streams with video add #EXT-X-STREAM-INF tag with attributes*/
for (i = 0; i < hls->nb_varstreams; i++) {
@@ -1143,18 +1123,7 @@ static int create_master_playlist(AVFormatContext *s,
bandwidth += aud_st->codecpar->bit_rate;
bandwidth += bandwidth / 10;
- if (!bandwidth) {
- av_log(NULL, AV_LOG_WARNING,
- "Bandwidth info not available, set audio and video bitrates\n");
- av_freep(&m3u8_rel_name);
- continue;
- }
-
- avio_printf(master_pb, "#EXT-X-STREAM-INF:BANDWIDTH=%d", bandwidth);
- if (vid_st && vid_st->codecpar->width > 0 && vid_st->codecpar->height > 0)
- avio_printf(master_pb, ",RESOLUTION=%dx%d", vid_st->codecpar->width,
- vid_st->codecpar->height);
- avio_printf(master_pb, "\n%s\n\n", m3u8_rel_name);
+ ff_hls_write_stream_info(vid_st, master_pb, bandwidth, m3u8_rel_name);
av_freep(&m3u8_rel_name);
}
@@ -1183,6 +1152,7 @@ static int hls_window(AVFormatContext *s, int last, VariantStream *vs)
char *iv_string = NULL;
AVDictionary *options = NULL;
double prog_date_time = vs->initial_prog_date_time;
+ double *prog_date_time_p = (hls->flags & HLS_PROGRAM_DATE_TIME) ? &prog_date_time : NULL;
int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
hls->version = 3;
@@ -1213,12 +1183,8 @@ static int hls_window(AVFormatContext *s, int last, VariantStream *vs)
}
vs->discontinuity_set = 0;
- write_m3u8_head_block(hls, out, hls->version, target_duration, sequence);
- if (hls->pl_type == PLAYLIST_TYPE_EVENT) {
- avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
- } else if (hls->pl_type == PLAYLIST_TYPE_VOD) {
- avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
- }
+ ff_hls_write_playlist_header(out, hls->version, hls->allowcache,
+ target_duration, sequence, hls->pl_type);
if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && vs->discontinuity_set==0 ){
avio_printf(out, "#EXT-X-DISCONTINUITY\n");
@@ -1238,74 +1204,35 @@ static int hls_window(AVFormatContext *s, int last, VariantStream *vs)
iv_string = en->iv_string;
}
- if (en->discont) {
- avio_printf(out, "#EXT-X-DISCONTINUITY\n");
- }
-
if ((hls->segment_type == SEGMENT_TYPE_FMP4) && (en == vs->segments)) {
- avio_printf(out, "#EXT-X-MAP:URI=\"%s\"", vs->fmp4_init_filename);
- if (hls->flags & HLS_SINGLE_FILE) {
- avio_printf(out, ",BYTERANGE=\"%"PRId64"@%"PRId64"\"", en->size, en->pos);
- }
- avio_printf(out, "\n");
+ ff_hls_write_init_file(out, vs->fmp4_init_filename,
+ hls->flags & HLS_SINGLE_FILE, en->size, en->pos);
}
- 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 (byterange_mode)
- avio_printf(out, "#EXT-X-BYTERANGE:%"PRId64"@%"PRId64"\n",
- en->size, en->pos);
-
- if (hls->flags & HLS_PROGRAM_DATE_TIME) {
- time_t tt, wrongsecs;
- int milli;
- struct tm *tm, tmpbuf;
- char buf0[128], buf1[128];
- tt = (int64_t)prog_date_time;
- milli = av_clip(lrint(1000*(prog_date_time - tt)), 0, 999);
- tm = localtime_r(&tt, &tmpbuf);
- strftime(buf0, sizeof(buf0), "%Y-%m-%dT%H:%M:%S", tm);
- if (!strftime(buf1, sizeof(buf1), "%z", tm) || buf1[1]<'0' ||buf1[1]>'2') {
- int tz_min, dst = tm->tm_isdst;
- tm = gmtime_r(&tt, &tmpbuf);
- tm->tm_isdst = dst;
- wrongsecs = mktime(tm);
- tz_min = (FFABS(wrongsecs - tt) + 30) / 60;
- snprintf(buf1, sizeof(buf1),
- "%c%02d%02d",
- wrongsecs <= tt ? '+' : '-',
- tz_min / 60,
- tz_min % 60);
- }
- avio_printf(out, "#EXT-X-PROGRAM-DATE-TIME:%s.%03d%s\n", buf0, milli, buf1);
- prog_date_time += en->duration;
- }
- if (vs->baseurl)
- avio_printf(out, "%s", vs->baseurl);
- avio_printf(out, "%s\n", en->filename);
+
+ ff_hls_write_file_entry(out, en->discont, byterange_mode,
+ en->duration, hls->flags & HLS_ROUND_DURATIONS,
+ en->size, en->pos, vs->baseurl,
+ en->filename, prog_date_time_p);
+
}
if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
- avio_printf(out, "#EXT-X-ENDLIST\n");
+ ff_hls_write_end_list(out);
if( vs->vtt_m3u8_name ) {
if ((ret = s->io_open(s, &sub_out, vs->vtt_m3u8_name, AVIO_FLAG_WRITE, &options)) < 0)
goto fail;
- write_m3u8_head_block(hls, sub_out, hls->version, target_duration, sequence);
+ ff_hls_write_playlist_header(sub_out, hls->version, hls->allowcache,
+ target_duration, sequence, PLAYLIST_TYPE_NONE);
for (en = vs->segments; en; en = en->next) {
- avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
- if (byterange_mode)
- avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
- en->size, en->pos);
- if (vs->baseurl)
- avio_printf(sub_out, "%s", vs->baseurl);
- avio_printf(sub_out, "%s\n", en->sub_filename);
+ ff_hls_write_file_entry(sub_out, 0, byterange_mode,
+ en->duration, 0, en->size, en->pos,
+ vs->baseurl, en->sub_filename, NULL);
}
if (last)
- avio_printf(sub_out, "#EXT-X-ENDLIST\n");
+ ff_hls_write_end_list(sub_out);
}
diff --git a/libavformat/hlsplaylist.c b/libavformat/hlsplaylist.c
new file mode 100644
index 0000000..235e519
--- /dev/null
+++ b/libavformat/hlsplaylist.c
@@ -0,0 +1,138 @@
+/*
+ * Apple HTTP Live Streaming segmenter
+ * Copyright (c) 2012, Luca Barbato
+ * Copyright (c) 2017 Akamai Technologies, Inc.
+ *
+ * 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 <stdint.h>
+
+#include "libavutil/time_internal.h"
+
+#include "avformat.h"
+#include "hlsplaylist.h"
+
+void ff_hls_write_playlist_version(AVIOContext *out, int version) {
+ if (!out)
+ return;
+ avio_printf(out, "#EXTM3U\n");
+ avio_printf(out, "#EXT-X-VERSION:%d\n", version);
+}
+
+void ff_hls_write_stream_info(AVStream *st, AVIOContext *out,
+ int bandwidth, char *filename) {
+ if (!out || !filename)
+ return;
+
+ if (!bandwidth) {
+ av_log(NULL, AV_LOG_WARNING,
+ "Bandwidth info not available, set audio and video bitrates\n");
+ return;
+ }
+
+ avio_printf(out, "#EXT-X-STREAM-INF:BANDWIDTH=%d", bandwidth);
+ if (st && st->codecpar->width > 0 && st->codecpar->height > 0)
+ avio_printf(out, ",RESOLUTION=%dx%d", st->codecpar->width,
+ st->codecpar->height);
+ avio_printf(out, "\n%s\n\n", filename);
+}
+
+void ff_hls_write_playlist_header(AVIOContext *out, int version, int allowcache,
+ int target_duration, int64_t sequence,
+ uint32_t playlist_type) {
+ if (!out)
+ return;
+ ff_hls_write_playlist_version(out, version);
+ if (allowcache == 0 || allowcache == 1) {
+ avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", 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(NULL, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
+
+ if (playlist_type == PLAYLIST_TYPE_EVENT) {
+ avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
+ } else if (playlist_type == PLAYLIST_TYPE_VOD) {
+ avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
+ }
+}
+
+void ff_hls_write_init_file(AVIOContext *out, char *filename,
+ int byterange_mode, int64_t size, int64_t pos) {
+ avio_printf(out, "#EXT-X-MAP:URI=\"%s\"", filename);
+ if (byterange_mode) {
+ avio_printf(out, ",BYTERANGE=\"%"PRId64"@%"PRId64"\"", size, pos);
+ }
+ avio_printf(out, "\n");
+}
+
+void ff_hls_write_file_entry(AVIOContext *out, int insert_discont,
+ int byterange_mode,
+ double duration, int round_duration,
+ int64_t size, int64_t pos, //Used only if HLS_SINGLE_FILE flag is set
+ char *baseurl, //Ignored if NULL
+ char *filename, double *prog_date_time) {
+ if (!out || !filename)
+ return;
+
+ if (insert_discont) {
+ avio_printf(out, "#EXT-X-DISCONTINUITY\n");
+ }
+ if (round_duration)
+ avio_printf(out, "#EXTINF:%ld,\n", lrint(duration));
+ else
+ avio_printf(out, "#EXTINF:%f,\n", duration);
+ if (byterange_mode)
+ avio_printf(out, "#EXT-X-BYTERANGE:%"PRId64"@%"PRId64"\n", size, pos);
+
+ if (prog_date_time) {
+ time_t tt, wrongsecs;
+ int milli;
+ struct tm *tm, tmpbuf;
+ char buf0[128], buf1[128];
+ tt = (int64_t)*prog_date_time;
+ milli = av_clip(lrint(1000*(*prog_date_time - tt)), 0, 999);
+ tm = localtime_r(&tt, &tmpbuf);
+ strftime(buf0, sizeof(buf0), "%Y-%m-%dT%H:%M:%S", tm);
+ if (!strftime(buf1, sizeof(buf1), "%z", tm) || buf1[1]<'0' ||buf1[1]>'2') {
+ int tz_min, dst = tm->tm_isdst;
+ tm = gmtime_r(&tt, &tmpbuf);
+ tm->tm_isdst = dst;
+ wrongsecs = mktime(tm);
+ tz_min = (FFABS(wrongsecs - tt) + 30) / 60;
+ snprintf(buf1, sizeof(buf1),
+ "%c%02d%02d",
+ wrongsecs <= tt ? '+' : '-',
+ tz_min / 60,
+ tz_min % 60);
+ }
+ avio_printf(out, "#EXT-X-PROGRAM-DATE-TIME:%s.%03d%s\n", buf0, milli, buf1);
+ *prog_date_time += duration;
+ }
+ if (baseurl)
+ avio_printf(out, "%s", baseurl);
+ avio_printf(out, "%s\n", filename);
+}
+
+void ff_hls_write_end_list (AVIOContext *out) {
+ if (!out)
+ return;
+ avio_printf(out, "#EXT-X-ENDLIST\n");
+}
+
diff --git a/libavformat/hlsplaylist.h b/libavformat/hlsplaylist.h
new file mode 100644
index 0000000..fd36c7e
--- /dev/null
+++ b/libavformat/hlsplaylist.h
@@ -0,0 +1,51 @@
+/*
+ * Apple HTTP Live Streaming segmenter
+ * Copyright (c) 2012, Luca Barbato
+ * Copyright (c) 2017 Akamai Technologies, Inc.
+ *
+ * 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
+ */
+
+#ifndef AVFORMAT_HLSPLAYLIST_H_
+#define AVFORMAT_HLSPLAYLIST_H_
+
+#include "libavutil/common.h"
+
+typedef enum {
+ PLAYLIST_TYPE_NONE,
+ PLAYLIST_TYPE_EVENT,
+ PLAYLIST_TYPE_VOD,
+ PLAYLIST_TYPE_NB,
+} PlaylistType;
+
+void ff_hls_write_playlist_version(AVIOContext *out, int version);
+void ff_hls_write_stream_info(AVStream *st, AVIOContext *out,
+ int bandwidth, char *filename);
+void ff_hls_write_playlist_header(AVIOContext *out, int version, int allowcache,
+ int target_duration, int64_t sequence,
+ uint32_t playlist_type);
+void ff_hls_write_init_file(AVIOContext *out, char *filename,
+ int byterange_mode, int64_t size, int64_t pos);
+void ff_hls_write_file_entry(AVIOContext *out, int insert_discont,
+ int byterange_mode,
+ double duration, int round_duration,
+ int64_t size, int64_t pos, //Used only if HLS_SINGLE_FILE flag is set
+ char *baseurl, //Ignored if NULL
+ char *filename, double *prog_date_time);
+void ff_hls_write_end_list (AVIOContext *out);
+
+#endif /* AVFORMAT_HLSPLAYLIST_H_ */
--
1.9.1
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