>From aa824368fc020e052905fc1a651477d2880281d5 Mon Sep 17 00:00:00 2001
From: vckt <coderven...@gmail.com>
Date: Fri, 5 Jul 2024 18:51:32 +0530
Subject: [PATCH] avformat/hls: Fixed incorrect behaviour of default setting,
added autoselect and forced
In absence of defualt in var_stream_map, it was setting default=yes on every
stream,
but according to RFC8216 4.3.4.1 only one stream in a default group may have
that.
Additionally added support for autoselect=yes/no, whose presence combined with
default
means that it MUST be YES. Similarly forced=yes/no for subtitle stream.
Showed sample output of incorrectness in bug #11088
Signed-off-by: vckt <coderven...@gmail.com>
---
libavformat/dashenc.c | 3 ++-
libavformat/hlsenc.c | 41 +++++++++++++++++++++++++++++++++++++--
libavformat/hlsplaylist.c | 25 ++++++++++++++++++++----
libavformat/hlsplaylist.h | 6 ++++--
4 files changed, 66 insertions(+), 9 deletions(-)
diff --git a/libavformat/dashenc.c b/libavformat/dashenc.c
index d4a6fe0304..898a227cbe 100644
--- a/libavformat/dashenc.c
+++ b/libavformat/dashenc.c
@@ -1273,6 +1273,7 @@ static int write_manifest(AVFormatContext *s, int final)
const char *audio_group = "A1";
char audio_codec_str[128] = "\0";
int is_default = 1;
+ int autoselect = 0;
int max_audio_bitrate = 0;
for (i = 0; i < s->nb_streams; i++) {
@@ -1285,7 +1286,7 @@ static int write_manifest(AVFormatContext *s, int final)
continue;
get_hls_playlist_name(playlist_file, sizeof(playlist_file),
NULL, i);
ff_hls_write_audio_rendition(c->m3u8_out, audio_group,
- playlist_file, NULL, i,
is_default,
+ playlist_file, NULL, i,
is_default, autoselect,
s->streams[i]->codecpar->ch_layout.nb_channels);
max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
os->muxer_overhead,
max_audio_bitrate);
diff --git a/libavformat/hlsenc.c b/libavformat/hlsenc.c
index 274de00f9a..af4501af54 100644
--- a/libavformat/hlsenc.c
+++ b/libavformat/hlsenc.c
@@ -184,6 +184,8 @@ typedef struct VariantStream {
unsigned int nb_streams;
int m3u8_created; /* status of media play-list creation */
int is_default; /* default status of audio group */
+ int autoselect; /* autoselect by system language */
+ int forced; /* forced status of subtitle stream */
const char *language; /* audio language name */
const char *agroup; /* audio group name */
const char *sgroup; /* subtitle group name */
@@ -1434,6 +1436,31 @@ static int create_master_playlist(AVFormatContext *s,
avio_printf(hls->m3u8_out, ",INSTREAM-ID=\"%s\"\n", ccs->instreamid);
}
+ /* Check only one default is present in a group */
+ for (i = 0; i < hls->nb_varstreams; i++) {
+ vs = &(hls->var_streams[i]);
+ for (j = 0; j < hls->nb_varstreams; j++) {
+ if (i != j) {
+ temp_vs = &(hls->var_streams[j]);
+ if (vs->agroup && temp_vs->agroup &&
+ !vs->has_video && !temp_vs->has_video) {
+ if (!av_strcasecmp(vs->agroup, temp_vs->agroup) &&
+ vs->is_default && temp_vs->is_default) {
+ av_log(s, AV_LOG_ERROR, "Two streams in an agroup can
not be default\n");
+ goto fail;
+ }
+ } else if (vs->sgroup && temp_vs->sgroup &&
+ !vs->has_video && !temp_vs->has_video) {
+ if (!av_strcasecmp(vs->sgroup, temp_vs->sgroup) &&
+ vs->is_default && temp_vs->is_default) {
+ av_log(s, AV_LOG_ERROR, "Two streams in an sgroup can
not be default\n");
+ goto fail;
+ }
+ }
+ }
+ }
+ }
+
/* For audio only variant streams add #EXT-X-MEDIA tag with attributes*/
for (i = 0; i < hls->nb_varstreams; i++) {
vs = &(hls->var_streams[i]);
@@ -1452,7 +1479,7 @@ static int create_master_playlist(AVFormatContext *s,
if (vs->streams[j]->codecpar->ch_layout.nb_channels >
nb_channels)
nb_channels =
vs->streams[j]->codecpar->ch_layout.nb_channels;
- ff_hls_write_audio_rendition(hls->m3u8_out, vs->agroup, m3u8_rel_name,
vs->language, i, hls->has_default_key ? vs->is_default : 1, nb_channels);
+ ff_hls_write_audio_rendition(hls->m3u8_out, vs->agroup, m3u8_rel_name,
vs->language, i, hls->has_default_key ? vs->is_default : 0, vs->autoselect,
nb_channels);
}
/* For variant streams with video add #EXT-X-STREAM-INF tag with
attributes*/
@@ -1533,7 +1560,7 @@ static int create_master_playlist(AVFormatContext *s,
break;
}
- ff_hls_write_subtitle_rendition(hls->m3u8_out, sgroup,
vtt_m3u8_rel_name, vs->language, i, hls->has_default_key ? vs->is_default : 1);
+ ff_hls_write_subtitle_rendition(hls->m3u8_out, sgroup,
vtt_m3u8_rel_name, vs->language, i, hls->has_default_key ? vs->is_default : 0,
vs->autoselect, vs->forced);
}
if (!hls->has_default_key || !hls->has_video_m3u8) {
@@ -2104,6 +2131,16 @@ static int
parse_variant_stream_mapstring(AVFormatContext *s)
(!av_strncasecmp(val, "1", strlen("1"))));
hls->has_default_key = 1;
continue;
+ } else if (av_strstart(keyval, "autoselect:", &val)) {
+ vs->autoselect = (!av_strncasecmp(val, "YES", strlen("YES")) ||
+ (!av_strncasecmp(val, "1", strlen("1")))) ||
+ (hls->has_default_key && vs->is_default);
+ /* autoselect must = 1 if default = 1 */
+ continue;
+ } else if (av_strstart(keyval, "forced:", &val)) {
+ vs->forced = (!av_strncasecmp(val, "YES", strlen("YES")) ||
+ (!av_strncasecmp(val, "1", strlen("1"))));
+ continue;
} else if (av_strstart(keyval, "name:", &val)) {
vs->varname = val;
continue;
diff --git a/libavformat/hlsplaylist.c b/libavformat/hlsplaylist.c
index f8a6977702..40a8a36849 100644
--- a/libavformat/hlsplaylist.c
+++ b/libavformat/hlsplaylist.c
@@ -39,13 +39,20 @@ void ff_hls_write_playlist_version(AVIOContext *out, int
version)
void ff_hls_write_audio_rendition(AVIOContext *out, const char *agroup,
const char *filename, const char *language,
- int name_id, int is_default, int nb_channels)
+ int name_id, int is_default,
+ int autoselect, int nb_channels)
{
if (!out || !agroup || !filename)
return;
avio_printf(out, "#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID=\"group_%s\"", agroup);
- avio_printf(out, ",NAME=\"audio_%d\",DEFAULT=%s,", name_id, is_default ?
"YES" : "NO");
+ avio_printf(out, ",NAME=\"audio_%d\",", name_id);
+ if (is_default) {
+ avio_printf(out, "DEFAULT=YES,");
+ }
+ if (autoselect) {
+ avio_printf(out, "AUTOSELECT=YES,");
+ }
if (language) {
avio_printf(out, "LANGUAGE=\"%s\",", language);
}
@@ -57,13 +64,23 @@ void ff_hls_write_audio_rendition(AVIOContext *out, const
char *agroup,
void ff_hls_write_subtitle_rendition(AVIOContext *out, const char *sgroup,
const char *filename, const char
*language,
- int name_id, int is_default)
+ int name_id, int is_default,
+ int autoselect, int forced)
{
if (!out || !filename)
return;
avio_printf(out, "#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=\"%s\"", sgroup);
- avio_printf(out, ",NAME=\"subtitle_%d\",DEFAULT=%s,", name_id, is_default
? "YES" : "NO");
+ avio_printf(out, ",NAME=\"subtitle_%d\",", name_id);
+ if (is_default) {
+ avio_printf(out, "DEFAULT=YES,");
+ }
+ if (autoselect) {
+ avio_printf(out, "AUTOSELECT=YES,");
+ }
+ if (forced) {
+ avio_printf(out, "FORCED=YES,");
+ }
if (language) {
avio_printf(out, "LANGUAGE=\"%s\",", language);
}
diff --git a/libavformat/hlsplaylist.h b/libavformat/hlsplaylist.h
index d7aa44d8dc..41e640a09a 100644
--- a/libavformat/hlsplaylist.h
+++ b/libavformat/hlsplaylist.h
@@ -38,10 +38,12 @@ typedef enum {
void ff_hls_write_playlist_version(AVIOContext *out, int version);
void ff_hls_write_audio_rendition(AVIOContext *out, const char *agroup,
const char *filename, const char *language,
- int name_id, int is_default, int
nb_channels);
+ int name_id, int is_default,
+ int autoselect, int nb_channels);
void ff_hls_write_subtitle_rendition(AVIOContext *out, const char *sgroup,
const char *filename, const char
*language,
- int name_id, int is_default);
+ int name_id, int is_default,
+ int autoselect, int forced);
void ff_hls_write_stream_info(AVStream *st, AVIOContext *out, int bandwidth,
int avg_bandwidth,
const char *filename, const char *agroup,
--
2.30.1.windows.1
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