add default property to sequence & closed captions

README.md

@@ -532,6 +532,8 @@ Optional fields:
 * `label` - a friendly string that identifies the sequence. If a language is specified,
 	a default label will be automatically derived by it - e.g. if language is `ita`, 
 	by default `italiano` will be used as the label.
+* `default` - a boolean that sets the value of the DEFAULT attribute of EXT-X-MEDIA tags using this sequence.
+	If not specified, the first EXT-X-MEDIA tag in each group returns DEFAULT=YES, while the others return DEFAULT=NO.
 * `bitrate` - an object that can be used to set the bitrate for the different media types,
 	in bits per second. For example, `{"v": 900000, "a": 64000}`. If the bitrate is not supplied,
 	nginx-vod-module will estimate it based on the last clip in the sequence.

ngx_http_vod_module.c

@@ -3577,7 +3577,7 @@ ngx_http_vod_run_generators(ngx_http_vod_ctx_t *ctx)
 		}
 
 		if (parse_params.langs_mask != NULL &&
-			!vod_is_bit_set(parse_params.langs_mask, cur_source->sequence->language))
+			!vod_is_bit_set(parse_params.langs_mask, cur_source->sequence->tags.language))
 		{
 			ngx_memzero(&cur_source->track_array, sizeof(cur_source->track_array));
 			continue;
@@ -5336,9 +5336,7 @@ ngx_http_vod_map_media_set_apply(ngx_http_vod_ctx_t *ctx, ngx_str_t* mapping, in
 			ctx->submodule_context.media_set.segmenter_conf = mapped_media_set.segmenter_conf;
 			sequence = cur_source->sequence;
 			sequence->mapped_uri = mapped_source->mapped_uri;
-			sequence->lang_str = mapped_media_set.sequences->lang_str;
-			sequence->language = mapped_media_set.sequences->language;
-			sequence->label = mapped_media_set.sequences->label;
+			sequence->tags = mapped_media_set.sequences->tags;
 			sequence->id = mapped_media_set.sequences->id;
 			ngx_memcpy(sequence->bitrate, mapped_media_set.sequences->bitrate, sizeof(sequence->bitrate));
 			ngx_memcpy(sequence->avg_bitrate, mapped_media_set.sequences->avg_bitrate, sizeof(sequence->avg_bitrate));

ngx_http_vod_request_parse.c

@@ -734,10 +734,10 @@ ngx_http_vod_parse_lang_param(ngx_str_t* value, void* output, int offset)
 		return NGX_HTTP_BAD_REQUEST;
 	}
 
-	sequence->lang_str.data = (u_char *)lang_get_rfc_5646_name(result);
-	sequence->lang_str.len = ngx_strlen(sequence->lang_str.data);
-	sequence->language = result;
-	lang_get_native_name(result, &sequence->label);
+	sequence->tags.lang_str.data = (u_char *)lang_get_rfc_5646_name(result);
+	sequence->tags.lang_str.len = ngx_strlen(sequence->tags.lang_str.data);
+	sequence->tags.language = result;
+	lang_get_native_name(result, &sequence->tags.label);
 
 	return VOD_OK;
 }
@@ -1078,9 +1078,10 @@ ngx_http_vod_parse_uri_path(
 		}
 
 		cur_sequence->id.len = 0;
-		cur_sequence->lang_str.len = 0;
-		cur_sequence->language = 0;
-		cur_sequence->label.len = 0;
+		cur_sequence->tags.lang_str.len = 0;
+		cur_sequence->tags.language = 0;
+		cur_sequence->tags.label.len = 0;
+		cur_sequence->tags.is_default = -1;
 		cur_sequence->first_key_frame_offset = 0;
 		cur_sequence->key_frame_durations = NULL;
 		cur_sequence->drm_info = NULL;

vod/dash/dash_packager.c

@@ -326,12 +326,12 @@ dash_packager_compare_tracks(uintptr_t bitrate_threshold, const media_info_t* mi
 			(mi1->u.video.height == mi2->u.video.height);
 	}
 
-	if (mi1->label.len == 0 || mi2->label.len == 0)
+	if (mi1->tags.label.len == 0 || mi2->tags.label.len == 0)
 	{
 		return TRUE;
 	}
 
-	return vod_str_equals(mi1->label, mi2->label);
+	return vod_str_equals(mi1->tags.label, mi2->tags.label);
 }
 
 static void
@@ -858,12 +858,12 @@ dash_packager_write_mpd_period(
 
 		case MEDIA_TYPE_AUDIO:
 			reference_track = (*adaptation_set->first) + filtered_clip_offset;
-			if (reference_track->media_info.lang_str.len > 0 || reference_track->media_info.label.len > 0)
+			if (reference_track->media_info.tags.lang_str.len > 0 || reference_track->media_info.tags.label.len > 0)
 			{
 				p = vod_sprintf(p, VOD_DASH_MANIFEST_ADAPTATION_HEADER_AUDIO_LANG, 
 					adapt_id++, 
-					&reference_track->media_info.lang_str,
-					&reference_track->media_info.label);
+					&reference_track->media_info.tags.lang_str,
+					&reference_track->media_info.tags.label);
 			}
 			else
 			{
@@ -889,8 +889,8 @@ dash_packager_write_mpd_period(
 			{
 				reference_track = (*adaptation_set->first) + filtered_clip_offset;
 				p = vod_sprintf(p, VOD_DASH_MANIFEST_ADAPTATION_HEADER_SUBTITLE_SMPTE_TT,
-					&reference_track->media_info.lang_str,
-					&reference_track->media_info.label);
+					&reference_track->media_info.tags.lang_str,
+					&reference_track->media_info.tags.label);
 				break;
 			}
 
@@ -919,10 +919,10 @@ dash_packager_write_mpd_period(
 				representation_id.len--;
 			}
 
-			lang_code = lang_get_rfc_5646_name(cur_track->media_info.language);
+			lang_code = lang_get_rfc_5646_name(cur_track->media_info.tags.language);
 			p = vod_sprintf(p, VOD_DASH_MANIFEST_ADAPTATION_SUBTITLE_VTT,
-				&cur_track->media_info.lang_str,
-				&cur_track->media_info.label,
+				&cur_track->media_info.tags.lang_str,
+				&cur_track->media_info.tags.label,
 				lang_code,
 				subtitle_adapt_id++, 
 				&cur_base_url,
@@ -1205,7 +1205,7 @@ dash_packager_remove_redundant_tracks(
 
 			// prefer to remove a track that doesn't have a label, so that we won't lose a language 
 			//	in case of multi language manifest
-			if (track1->media_info.label.len == 0 || track2->media_info.label.len != 0)
+			if (track1->media_info.tags.label.len == 0 || track2->media_info.tags.label.len != 0)
 			{
 				remove = track1;
 			}
@@ -1438,7 +1438,7 @@ dash_packager_build_mpd(
 			case MEDIA_TYPE_AUDIO:
 			case MEDIA_TYPE_SUBTITLE:
 				cur_track = (*adaptation_set->first) + filtered_clip_offset;
-				result_size += cur_track->media_info.label.len + cur_track->media_info.lang_str.len;
+				result_size += cur_track->media_info.tags.label.len + cur_track->media_info.tags.lang_str.len;
 				break;
 			}
 		}

vod/hds/hds_manifest.c

@@ -462,14 +462,14 @@ hds_packager_build_manifest(
 		{
 			if (adaptation_set->first[MEDIA_TYPE_AUDIO] != NULL)
 			{
-				result_size += adaptation_set->first[MEDIA_TYPE_AUDIO]->media_info.label.len +
-					adaptation_set->first[MEDIA_TYPE_AUDIO]->media_info.lang_str.len;
+				result_size += adaptation_set->first[MEDIA_TYPE_AUDIO]->media_info.tags.label.len +
+					adaptation_set->first[MEDIA_TYPE_AUDIO]->media_info.tags.lang_str.len;
 			}
 		}
 		else
 		{
-			result_size += adaptation_set->first[0]->media_info.label.len +
-				adaptation_set->first[0]->media_info.lang_str.len;
+			result_size += adaptation_set->first[0]->media_info.tags.label.len +
+				adaptation_set->first[0]->media_info.tags.lang_str.len;
 		}
 
 		for (cur_track_ptr = adaptation_set->first; cur_track_ptr < adaptation_set->last; cur_track_ptr += muxed_tracks)
@@ -573,8 +573,8 @@ hds_packager_build_manifest(
 		}
 
 		p = vod_sprintf(p, HDS_MANIFEST_HEADER_LANG, 
-			&track->media_info.label,
-			&track->media_info.lang_str);
+			&track->media_info.tags.label,
+			&track->media_info.tags.lang_str);
 	}
 
 	// bootstrap tags
@@ -704,8 +704,8 @@ hds_packager_build_manifest(
 				{
 					p = vod_sprintf(p, HDS_MEDIA_HEADER_PREFIX_AUDIO_LANG,
 						bitrate / 1000, 
-						&tracks[MEDIA_TYPE_AUDIO]->media_info.label, 
-						&tracks[MEDIA_TYPE_AUDIO]->media_info.lang_str);
+						&tracks[MEDIA_TYPE_AUDIO]->media_info.tags.label,
+						&tracks[MEDIA_TYPE_AUDIO]->media_info.tags.lang_str);
 				}
 				else
 				{

vod/hls/m3u8_builder.c

@@ -855,6 +855,7 @@ m3u8_builder_closed_captions_write(
 {
 	media_closed_captions_t* closed_captions;
 	uint32_t index = 0;
+	bool_t is_default;
 
 	for (closed_captions = media_set->closed_captions; closed_captions < media_set->closed_captions_end; closed_captions++)
 	{
@@ -869,7 +870,13 @@ m3u8_builder_closed_captions_write(
 			p = vod_sprintf(p, M3U8_EXT_MEDIA_LANG, &closed_captions->language);
 		}
 
-		if (closed_captions == media_set->closed_captions)
+		is_default = closed_captions->is_default;
+		if (is_default < 0)
+		{
+			is_default = closed_captions == media_set->closed_captions;
+		}
+
+		if (is_default)
 		{
 			p = vod_copy(p, M3U8_EXT_MEDIA_DEFAULT, sizeof(M3U8_EXT_MEDIA_DEFAULT) - 1);
 		}
@@ -921,8 +928,8 @@ m3u8_builder_ext_x_media_tags_get_size(
 	{
 		cur_track = adaptation_set->first[0];
 
-		label_len = cur_track->media_info.label.len;
-		result += vod_max(label_len, default_label.len) + cur_track->media_info.lang_str.len;
+		label_len = cur_track->media_info.tags.label.len;
+		result += vod_max(label_len, default_label.len) + cur_track->media_info.tags.lang_str.len;
 
 		if (base_url->len != 0)
 		{
@@ -948,6 +955,7 @@ m3u8_builder_ext_x_media_tags_write(
 	media_track_t* tracks[MEDIA_TYPE_COUNT];
 	vod_str_t* label;
 	uint32_t group_index;
+	bool_t is_default;
 	char* group_id;
 	char* type;
 
@@ -988,7 +996,7 @@ m3u8_builder_ext_x_media_tags_write(
 			group_index = 0;
 		}
 
-		label = &tracks[media_type]->media_info.label;
+		label = &tracks[media_type]->media_info.tags.label;
 		if (label->len == 0)
 		{
 			label = &default_label;
@@ -1000,13 +1008,19 @@ m3u8_builder_ext_x_media_tags_write(
 			group_index,
 			label);
 
-		if (tracks[media_type]->media_info.lang_str.len > 0)
+		if (tracks[media_type]->media_info.tags.lang_str.len > 0)
 		{
 			p = vod_sprintf(p, M3U8_EXT_MEDIA_LANG,
-				&tracks[media_type]->media_info.lang_str);
+				&tracks[media_type]->media_info.tags.lang_str);
+		}
+
+		is_default = tracks[media_type]->media_info.tags.is_default;
+		if (is_default < 0)
+		{
+			is_default = adaptation_set == first_adaptation_set;
 		}
 
-		if (adaptation_set == first_adaptation_set)
+		if (is_default)
 		{
 			p = vod_copy(p, M3U8_EXT_MEDIA_DEFAULT, sizeof(M3U8_EXT_MEDIA_DEFAULT) - 1);
 		}

vod/input/silence_generator.c

@@ -102,9 +102,7 @@ silence_generator_generate(
 	track->media_info.duration_millis = parse_params->clip_to - parse_params->clip_from;
 	track->media_info.full_duration = (uint64_t)track->media_info.duration_millis * track->media_info.timescale;
 	track->media_info.duration = track->media_info.full_duration;
-	track->media_info.lang_str = sequence->lang_str;
-	track->media_info.language = sequence->language;
-	track->media_info.label = sequence->label;
+	track->media_info.tags = sequence->tags;
 
 	rc = media_format_finalize_track(
 		request_context,

vod/manifest_utils.c

@@ -441,21 +441,21 @@ track_group_key_init(
 			break;
 		}
 
-		if (track->media_info.label.len == 0)
+		if (track->media_info.tags.label.len == 0)
 		{
 			return FALSE;
 		}
-		key->label = track->media_info.label;
+		key->label = track->media_info.tags.label;
 		break;
 
 	case MEDIA_TYPE_SUBTITLE:
 		key->codec_id = 0;
 
-		if (track->media_info.label.len == 0)
+		if (track->media_info.tags.label.len == 0)
 		{
 			return FALSE;
 		}
-		key->label = track->media_info.label;
+		key->label = track->media_info.tags.label;
 		break;
 
 	default:		// MEDIA_TYPE_NONE
@@ -796,16 +796,16 @@ manifest_utils_is_multi_audio(media_set_t* media_set)
 	for (cur_track = media_set->filtered_tracks; cur_track < last_track; cur_track++)
 	{
 		if (cur_track->media_info.media_type != MEDIA_TYPE_AUDIO ||
-			cur_track->media_info.label.len == 0)
+			cur_track->media_info.tags.label.len == 0)
 		{
 			continue;
 		}
 
 		if (label == NULL)
 		{
-			label = &cur_track->media_info.label;
+			label = &cur_track->media_info.tags.label;
 		}
-		else if (!vod_str_equals(cur_track->media_info.label, *label))
+		else if (!vod_str_equals(cur_track->media_info.tags.label, *label))
 		{
 			return TRUE;
 		}

vod/media_format.h

@@ -225,6 +225,13 @@ typedef struct {
 	mp4a_config_t codec_config;
 } audio_media_info_t;
 
+typedef struct {
+	language_id_t language;
+	vod_str_t lang_str;
+	vod_str_t label;
+	bool_t is_default;
+} media_tags_t;
+
 typedef struct media_info_s {
 	uint32_t media_type;
 	uint32_t format;
@@ -243,9 +250,7 @@ typedef struct media_info_s {
 	int64_t empty_duration;		// temporary during parsing
 	int64_t start_time;			// temporary during parsing
 	uint64_t codec_delay;
-	language_id_t language;
-	vod_str_t lang_str;
-	vod_str_t label;
+	media_tags_t tags;
 	union {
 		video_media_info_t video;
 		audio_media_info_t audio;

vod/media_set.h

@@ -59,9 +59,7 @@ struct media_sequence_s {
 	media_clip_t** clips;						// [clip_count]
 	vod_str_t stripped_uri;
 	vod_str_t id;
-	vod_str_t label;
-	vod_str_t lang_str;
-	language_id_t language;
+	media_tags_t tags;
 	uint32_t bitrate[MEDIA_TYPE_COUNT];
 	uint32_t avg_bitrate[MEDIA_TYPE_COUNT];
 	int64_t first_key_frame_offset;
@@ -109,6 +107,7 @@ typedef struct {
 	vod_str_t id;
 	vod_str_t language;
 	vod_str_t label;
+	bool_t is_default;
 } media_closed_captions_t;
 
 typedef struct {