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-rw-r--r--libavformat/webmdashenc.c550
1 files changed, 550 insertions, 0 deletions
diff --git a/libavformat/webmdashenc.c b/libavformat/webmdashenc.c
new file mode 100644
index 0000000000..76ea4237e2
--- /dev/null
+++ b/libavformat/webmdashenc.c
@@ -0,0 +1,550 @@
+/*
+ * WebM DASH Manifest XML muxer
+ * Copyright (c) 2014 Vignesh Venkatasubramanian
+ *
+ * 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
+ */
+
+/*
+ * WebM DASH Specification:
+ * https://sites.google.com/a/webmproject.org/wiki/adaptive-streaming/webm-dash-specification
+ * ISO DASH Specification:
+ * http://standards.iso.org/ittf/PubliclyAvailableStandards/c065274_ISO_IEC_23009-1_2014.zip
+ */
+
+#include <float.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "avformat.h"
+#include "avio_internal.h"
+#include "matroska.h"
+
+#include "libavutil/avstring.h"
+#include "libavutil/dict.h"
+#include "libavutil/opt.h"
+#include "libavutil/time_internal.h"
+
+typedef struct AdaptationSet {
+ char id[10];
+ int *streams;
+ int nb_streams;
+} AdaptationSet;
+
+typedef struct WebMDashMuxContext {
+ const AVClass *class;
+ char *adaptation_sets;
+ AdaptationSet *as;
+ int nb_as;
+ int representation_id;
+ int is_live;
+ int chunk_start_index;
+ int chunk_duration;
+ char *utc_timing_url;
+ double time_shift_buffer_depth;
+ int minimum_update_period;
+ int debug_mode;
+} WebMDashMuxContext;
+
+static const char *get_codec_name(int codec_id)
+{
+ switch (codec_id) {
+ case AV_CODEC_ID_VP8:
+ return "vp8";
+ case AV_CODEC_ID_VP9:
+ return "vp9";
+ case AV_CODEC_ID_VORBIS:
+ return "vorbis";
+ case AV_CODEC_ID_OPUS:
+ return "opus";
+ }
+ return NULL;
+}
+
+static double get_duration(AVFormatContext *s)
+{
+ int i = 0;
+ double max = 0.0;
+ for (i = 0; i < s->nb_streams; i++) {
+ AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata,
+ DURATION, NULL, 0);
+ if (!duration || atof(duration->value) < 0) continue;
+ if (atof(duration->value) > max) max = atof(duration->value);
+ }
+ return max / 1000;
+}
+
+static int write_header(AVFormatContext *s)
+{
+ WebMDashMuxContext *w = s->priv_data;
+ double min_buffer_time = 1.0;
+ avio_printf(s->pb, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
+ avio_printf(s->pb, "<MPD\n");
+ avio_printf(s->pb, " xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n");
+ avio_printf(s->pb, " xmlns=\"urn:mpeg:DASH:schema:MPD:2011\"\n");
+ avio_printf(s->pb, " xsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011\"\n");
+ avio_printf(s->pb, " type=\"%s\"\n", w->is_live ? "dynamic" : "static");
+ if (!w->is_live) {
+ avio_printf(s->pb, " mediaPresentationDuration=\"PT%gS\"\n",
+ get_duration(s));
+ }
+ avio_printf(s->pb, " minBufferTime=\"PT%gS\"\n", min_buffer_time);
+ avio_printf(s->pb, " profiles=\"%s\"%s",
+ w->is_live ? "urn:mpeg:dash:profile:isoff-live:2011" : "urn:webm:dash:profile:webm-on-demand:2012",
+ w->is_live ? "\n" : ">\n");
+ if (w->is_live) {
+ time_t local_time = time(NULL);
+ struct tm gmt_buffer;
+ struct tm *gmt = gmtime_r(&local_time, &gmt_buffer);
+ char gmt_iso[21];
+ if (!strftime(gmt_iso, 21, "%Y-%m-%dT%H:%M:%SZ", gmt)) {
+ return AVERROR_UNKNOWN;
+ }
+ if (w->debug_mode) {
+ av_strlcpy(gmt_iso, "", 1);
+ }
+ avio_printf(s->pb, " availabilityStartTime=\"%s\"\n", gmt_iso);
+ avio_printf(s->pb, " timeShiftBufferDepth=\"PT%gS\"\n", w->time_shift_buffer_depth);
+ avio_printf(s->pb, " minimumUpdatePeriod=\"PT%dS\"", w->minimum_update_period);
+ avio_printf(s->pb, ">\n");
+ if (w->utc_timing_url) {
+ avio_printf(s->pb, "<UTCTiming\n");
+ avio_printf(s->pb, " schemeIdUri=\"urn:mpeg:dash:utc:http-iso:2014\"\n");
+ avio_printf(s->pb, " value=\"%s\"/>\n", w->utc_timing_url);
+ }
+ }
+ return 0;
+}
+
+static void write_footer(AVFormatContext *s)
+{
+ avio_printf(s->pb, "</MPD>\n");
+}
+
+static int subsegment_alignment(AVFormatContext *s, AdaptationSet *as) {
+ int i;
+ AVDictionaryEntry *gold = av_dict_get(s->streams[as->streams[0]]->metadata,
+ CUE_TIMESTAMPS, NULL, 0);
+ if (!gold) return 0;
+ for (i = 1; i < as->nb_streams; i++) {
+ AVDictionaryEntry *ts = av_dict_get(s->streams[as->streams[i]]->metadata,
+ CUE_TIMESTAMPS, NULL, 0);
+ if (!ts || strncmp(gold->value, ts->value, strlen(gold->value))) return 0;
+ }
+ return 1;
+}
+
+static int bitstream_switching(AVFormatContext *s, AdaptationSet *as) {
+ int i;
+ AVDictionaryEntry *gold_track_num = av_dict_get(s->streams[as->streams[0]]->metadata,
+ TRACK_NUMBER, NULL, 0);
+ AVCodecContext *gold_codec = s->streams[as->streams[0]]->codec;
+ if (!gold_track_num) return 0;
+ for (i = 1; i < as->nb_streams; i++) {
+ AVDictionaryEntry *track_num = av_dict_get(s->streams[as->streams[i]]->metadata,
+ TRACK_NUMBER, NULL, 0);
+ AVCodecContext *codec = s->streams[as->streams[i]]->codec;
+ if (!track_num ||
+ strncmp(gold_track_num->value, track_num->value, strlen(gold_track_num->value)) ||
+ gold_codec->codec_id != codec->codec_id ||
+ gold_codec->extradata_size != codec->extradata_size ||
+ memcmp(gold_codec->extradata, codec->extradata, codec->extradata_size)) {
+ return 0;
+ }
+ }
+ return 1;
+}
+
+/*
+ * Writes a Representation within an Adaptation Set. Returns 0 on success and
+ * < 0 on failure.
+ */
+static int write_representation(AVFormatContext *s, AVStream *stream, char *id,
+ int output_width, int output_height,
+ int output_sample_rate) {
+ WebMDashMuxContext *w = s->priv_data;
+ AVDictionaryEntry *irange = av_dict_get(stream->metadata, INITIALIZATION_RANGE, NULL, 0);
+ AVDictionaryEntry *cues_start = av_dict_get(stream->metadata, CUES_START, NULL, 0);
+ AVDictionaryEntry *cues_end = av_dict_get(stream->metadata, CUES_END, NULL, 0);
+ AVDictionaryEntry *filename = av_dict_get(stream->metadata, FILENAME, NULL, 0);
+ AVDictionaryEntry *bandwidth = av_dict_get(stream->metadata, BANDWIDTH, NULL, 0);
+ if ((w->is_live && (!filename)) ||
+ (!w->is_live && (!irange || !cues_start || !cues_end || !filename || !bandwidth))) {
+ return AVERROR_INVALIDDATA;
+ }
+ avio_printf(s->pb, "<Representation id=\"%s\"", id);
+ // FIXME: For live, This should be obtained from the input file or as an AVOption.
+ avio_printf(s->pb, " bandwidth=\"%s\"",
+ w->is_live ? (stream->codec->codec_type == AVMEDIA_TYPE_AUDIO ? "128000" : "1000000") : bandwidth->value);
+ if (stream->codec->codec_type == AVMEDIA_TYPE_VIDEO && output_width)
+ avio_printf(s->pb, " width=\"%d\"", stream->codec->width);
+ if (stream->codec->codec_type == AVMEDIA_TYPE_VIDEO && output_height)
+ avio_printf(s->pb, " height=\"%d\"", stream->codec->height);
+ if (stream->codec->codec_type = AVMEDIA_TYPE_AUDIO && output_sample_rate)
+ avio_printf(s->pb, " audioSamplingRate=\"%d\"", stream->codec->sample_rate);
+ if (w->is_live) {
+ // For live streams, Codec and Mime Type always go in the Representation tag.
+ avio_printf(s->pb, " codecs=\"%s\"", get_codec_name(stream->codec->codec_id));
+ avio_printf(s->pb, " mimeType=\"%s/webm\"",
+ stream->codec->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
+ // For live streams, subsegments always start with key frames. So this
+ // is always 1.
+ avio_printf(s->pb, " startsWithSAP=\"1\"");
+ avio_printf(s->pb, ">");
+ } else {
+ avio_printf(s->pb, ">\n");
+ avio_printf(s->pb, "<BaseURL>%s</BaseURL>\n", filename->value);
+ avio_printf(s->pb, "<SegmentBase\n");
+ avio_printf(s->pb, " indexRange=\"%s-%s\">\n", cues_start->value, cues_end->value);
+ avio_printf(s->pb, "<Initialization\n");
+ avio_printf(s->pb, " range=\"0-%s\" />\n", irange->value);
+ avio_printf(s->pb, "</SegmentBase>\n");
+ }
+ avio_printf(s->pb, "</Representation>\n");
+ return 0;
+}
+
+/*
+ * Checks if width of all streams are the same. Returns 1 if true, 0 otherwise.
+ */
+static int check_matching_width(AVFormatContext *s, AdaptationSet *as) {
+ int first_width, i;
+ if (as->nb_streams < 2) return 1;
+ first_width = s->streams[as->streams[0]]->codec->width;
+ for (i = 1; i < as->nb_streams; i++)
+ if (first_width != s->streams[as->streams[i]]->codec->width)
+ return 0;
+ return 1;
+}
+
+/*
+ * Checks if height of all streams are the same. Returns 1 if true, 0 otherwise.
+ */
+static int check_matching_height(AVFormatContext *s, AdaptationSet *as) {
+ int first_height, i;
+ if (as->nb_streams < 2) return 1;
+ first_height = s->streams[as->streams[0]]->codec->height;
+ for (i = 1; i < as->nb_streams; i++)
+ if (first_height != s->streams[as->streams[i]]->codec->height)
+ return 0;
+ return 1;
+}
+
+/*
+ * Checks if sample rate of all streams are the same. Returns 1 if true, 0 otherwise.
+ */
+static int check_matching_sample_rate(AVFormatContext *s, AdaptationSet *as) {
+ int first_sample_rate, i;
+ if (as->nb_streams < 2) return 1;
+ first_sample_rate = s->streams[as->streams[0]]->codec->sample_rate;
+ for (i = 1; i < as->nb_streams; i++)
+ if (first_sample_rate != s->streams[as->streams[i]]->codec->sample_rate)
+ return 0;
+ return 1;
+}
+
+static void free_adaptation_sets(AVFormatContext *s) {
+ WebMDashMuxContext *w = s->priv_data;
+ int i;
+ for (i = 0; i < w->nb_as; i++) {
+ av_freep(&w->as[i].streams);
+ }
+ av_freep(&w->as);
+ w->nb_as = 0;
+}
+
+/*
+ * Parses a live header filename and computes the representation id,
+ * initialization pattern and the media pattern. Pass NULL if you don't want to
+ * compute any of those 3. Returns 0 on success and non-zero on failure.
+ *
+ * Name of the header file should conform to the following pattern:
+ * <file_description>_<representation_id>.hdr where <file_description> can be
+ * anything. The chunks should be named according to the following pattern:
+ * <file_description>_<representation_id>_<chunk_number>.chk
+ */
+static int parse_filename(char *filename, char **representation_id,
+ char **initialization_pattern, char **media_pattern) {
+ char *underscore_pos = NULL;
+ char *period_pos = NULL;
+ char *temp_pos = NULL;
+ char *filename_str = av_strdup(filename);
+ if (!filename_str) return AVERROR(ENOMEM);
+ temp_pos = av_stristr(filename_str, "_");
+ while (temp_pos) {
+ underscore_pos = temp_pos + 1;
+ temp_pos = av_stristr(temp_pos + 1, "_");
+ }
+ if (!underscore_pos) return AVERROR_INVALIDDATA;
+ period_pos = av_stristr(underscore_pos, ".");
+ if (!period_pos) return AVERROR_INVALIDDATA;
+ *(underscore_pos - 1) = 0;
+ if (representation_id) {
+ *representation_id = av_malloc(period_pos - underscore_pos + 1);
+ if (!(*representation_id)) return AVERROR(ENOMEM);
+ av_strlcpy(*representation_id, underscore_pos, period_pos - underscore_pos + 1);
+ }
+ if (initialization_pattern) {
+ *initialization_pattern = av_asprintf("%s_$RepresentationID$.hdr",
+ filename_str);
+ if (!(*initialization_pattern)) return AVERROR(ENOMEM);
+ }
+ if (media_pattern) {
+ *media_pattern = av_asprintf("%s_$RepresentationID$_$Number$.chk",
+ filename_str);
+ if (!(*media_pattern)) return AVERROR(ENOMEM);
+ }
+ av_free(filename_str);
+ return 0;
+}
+
+/*
+ * Writes an Adaptation Set. Returns 0 on success and < 0 on failure.
+ */
+static int write_adaptation_set(AVFormatContext *s, int as_index)
+{
+ WebMDashMuxContext *w = s->priv_data;
+ AdaptationSet *as = &w->as[as_index];
+ AVCodecContext *codec = s->streams[as->streams[0]]->codec;
+ AVDictionaryEntry *lang;
+ int i;
+ static const char boolean[2][6] = { "false", "true" };
+ int subsegmentStartsWithSAP = 1;
+
+ // Width, Height and Sample Rate will go in the AdaptationSet tag if they
+ // are the same for all contained Representations. otherwise, they will go
+ // on their respective Representation tag. For live streams, they always go
+ // in the Representation tag.
+ int width_in_as = 1, height_in_as = 1, sample_rate_in_as = 1;
+ if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+ width_in_as = !w->is_live && check_matching_width(s, as);
+ height_in_as = !w->is_live && check_matching_height(s, as);
+ } else {
+ sample_rate_in_as = !w->is_live && check_matching_sample_rate(s, as);
+ }
+
+ avio_printf(s->pb, "<AdaptationSet id=\"%s\"", as->id);
+ avio_printf(s->pb, " mimeType=\"%s/webm\"",
+ codec->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
+ avio_printf(s->pb, " codecs=\"%s\"", get_codec_name(codec->codec_id));
+
+ lang = av_dict_get(s->streams[as->streams[0]]->metadata, "language", NULL, 0);
+ if (lang) avio_printf(s->pb, " lang=\"%s\"", lang->value);
+
+ if (codec->codec_type == AVMEDIA_TYPE_VIDEO && width_in_as)
+ avio_printf(s->pb, " width=\"%d\"", codec->width);
+ if (codec->codec_type == AVMEDIA_TYPE_VIDEO && height_in_as)
+ avio_printf(s->pb, " height=\"%d\"", codec->height);
+ if (codec->codec_type == AVMEDIA_TYPE_AUDIO && sample_rate_in_as)
+ avio_printf(s->pb, " audioSamplingRate=\"%d\"", codec->sample_rate);
+
+ avio_printf(s->pb, " bitstreamSwitching=\"%s\"",
+ boolean[bitstream_switching(s, as)]);
+ avio_printf(s->pb, " subsegmentAlignment=\"%s\"",
+ boolean[w->is_live || subsegment_alignment(s, as)]);
+
+ for (i = 0; i < as->nb_streams; i++) {
+ AVDictionaryEntry *kf = av_dict_get(s->streams[as->streams[i]]->metadata,
+ CLUSTER_KEYFRAME, NULL, 0);
+ if (!w->is_live && (!kf || !strncmp(kf->value, "0", 1))) subsegmentStartsWithSAP = 0;
+ }
+ avio_printf(s->pb, " subsegmentStartsWithSAP=\"%d\"", subsegmentStartsWithSAP);
+ avio_printf(s->pb, ">\n");
+
+ if (w->is_live) {
+ AVDictionaryEntry *filename =
+ av_dict_get(s->streams[as->streams[0]]->metadata, FILENAME, NULL, 0);
+ char *initialization_pattern = NULL;
+ char *media_pattern = NULL;
+ int ret = parse_filename(filename->value, NULL, &initialization_pattern,
+ &media_pattern);
+ if (ret) return ret;
+ avio_printf(s->pb, "<ContentComponent id=\"1\" type=\"%s\"/>\n",
+ codec->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
+ avio_printf(s->pb, "<SegmentTemplate");
+ avio_printf(s->pb, " timescale=\"1000\"");
+ avio_printf(s->pb, " duration=\"%d\"", w->chunk_duration);
+ avio_printf(s->pb, " media=\"%s\"", media_pattern);
+ avio_printf(s->pb, " startNumber=\"%d\"", w->chunk_start_index);
+ avio_printf(s->pb, " initialization=\"%s\"", initialization_pattern);
+ avio_printf(s->pb, "/>\n");
+ av_free(initialization_pattern);
+ av_free(media_pattern);
+ }
+
+ for (i = 0; i < as->nb_streams; i++) {
+ char *representation_id = NULL;
+ int ret;
+ if (w->is_live) {
+ AVDictionaryEntry *filename =
+ av_dict_get(s->streams[as->streams[i]]->metadata, FILENAME, NULL, 0);
+ if (!filename ||
+ (ret = parse_filename(filename->value, &representation_id, NULL, NULL))) {
+ return ret;
+ }
+ } else {
+ representation_id = av_asprintf("%d", w->representation_id++);
+ if (!representation_id) return AVERROR(ENOMEM);
+ }
+ ret = write_representation(s, s->streams[as->streams[i]],
+ representation_id, !width_in_as,
+ !height_in_as, !sample_rate_in_as);
+ av_free(representation_id);
+ if (ret) return ret;
+ }
+ avio_printf(s->pb, "</AdaptationSet>\n");
+ return 0;
+}
+
+static int to_integer(char *p, int len)
+{
+ int ret;
+ char *q = av_malloc(sizeof(char) * len);
+ if (!q)
+ return AVERROR(ENOMEM);
+ av_strlcpy(q, p, len);
+ ret = atoi(q);
+ av_free(q);
+ return ret;
+}
+
+static int parse_adaptation_sets(AVFormatContext *s)
+{
+ WebMDashMuxContext *w = s->priv_data;
+ char *p = w->adaptation_sets;
+ char *q;
+ enum { new_set, parsed_id, parsing_streams } state;
+ // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
+ state = new_set;
+ while (p < w->adaptation_sets + strlen(w->adaptation_sets)) {
+ if (*p == ' ')
+ continue;
+ else if (state == new_set && !strncmp(p, "id=", 3)) {
+ void *mem = av_realloc(w->as, sizeof(*w->as) * (w->nb_as + 1));
+ if (mem == NULL)
+ return AVERROR(ENOMEM);
+ w->as = mem;
+ ++w->nb_as;
+ w->as[w->nb_as - 1].nb_streams = 0;
+ w->as[w->nb_as - 1].streams = NULL;
+ p += 3; // consume "id="
+ q = w->as[w->nb_as - 1].id;
+ while (*p != ',') *q++ = *p++;
+ *q = 0;
+ p++;
+ state = parsed_id;
+ } else if (state == parsed_id && !strncmp(p, "streams=", 8)) {
+ p += 8; // consume "streams="
+ state = parsing_streams;
+ } else if (state == parsing_streams) {
+ struct AdaptationSet *as = &w->as[w->nb_as - 1];
+ q = p;
+ while (*q != '\0' && *q != ',' && *q != ' ') q++;
+ as->streams = av_realloc(as->streams, sizeof(*as->streams) * ++as->nb_streams);
+ if (as->streams == NULL)
+ return AVERROR(ENOMEM);
+ as->streams[as->nb_streams - 1] = to_integer(p, q - p + 1);
+ if (as->streams[as->nb_streams - 1] < 0) return -1;
+ if (*q == '\0') break;
+ if (*q == ' ') state = new_set;
+ p = ++q;
+ } else {
+ return -1;
+ }
+ }
+ return 0;
+}
+
+static int webm_dash_manifest_write_header(AVFormatContext *s)
+{
+ int i;
+ double start = 0.0;
+ int ret;
+ WebMDashMuxContext *w = s->priv_data;
+ ret = parse_adaptation_sets(s);
+ if (ret < 0) {
+ goto fail;
+ }
+ ret = write_header(s);
+ if (ret < 0) {
+ goto fail;
+ }
+ avio_printf(s->pb, "<Period id=\"0\"");
+ avio_printf(s->pb, " start=\"PT%gS\"", start);
+ if (!w->is_live) {
+ avio_printf(s->pb, " duration=\"PT%gS\"", get_duration(s));
+ }
+ avio_printf(s->pb, " >\n");
+
+ for (i = 0; i < w->nb_as; i++) {
+ ret = write_adaptation_set(s, i);
+ if (ret < 0) {
+ goto fail;
+ }
+ }
+
+ avio_printf(s->pb, "</Period>\n");
+ write_footer(s);
+fail:
+ free_adaptation_sets(s);
+ return ret < 0 ? ret : 0;
+}
+
+static int webm_dash_manifest_write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ return AVERROR_EOF;
+}
+
+static int webm_dash_manifest_write_trailer(AVFormatContext *s)
+{
+ free_adaptation_sets(s);
+ return 0;
+}
+
+#define OFFSET(x) offsetof(WebMDashMuxContext, x)
+static const AVOption options[] = {
+ { "adaptation_sets", "Adaptation sets. Syntax: id=0,streams=0,1,2 id=1,streams=3,4 and so on", OFFSET(adaptation_sets), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
+ { "debug_mode", "[private option - users should never set this]. set this to 1 to create deterministic output", OFFSET(debug_mode), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
+ { "live", "set this to 1 to create a live stream manifest", OFFSET(is_live), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
+ { "chunk_start_index", "start index of the chunk", OFFSET(chunk_start_index), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+ { "chunk_duration_ms", "duration of each chunk (in milliseconds)", OFFSET(chunk_duration), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+ { "utc_timing_url", "URL of the page that will return the UTC timestamp in ISO format", OFFSET(utc_timing_url), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
+ { "time_shift_buffer_depth", "Smallest time (in seconds) shifting buffer for which any Representation is guaranteed to be available.", OFFSET(time_shift_buffer_depth), AV_OPT_TYPE_DOUBLE, { .dbl = 60.0 }, 1.0, DBL_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+ { "minimum_update_period", "Minimum Update Period (in seconds) of the manifest.", OFFSET(minimum_update_period), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+ { NULL },
+};
+
+#if CONFIG_WEBM_DASH_MANIFEST_MUXER
+static const AVClass webm_dash_class = {
+ .class_name = "WebM DASH Manifest muxer",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVOutputFormat ff_webm_dash_manifest_muxer = {
+ .name = "webm_dash_manifest",
+ .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
+ .mime_type = "application/xml",
+ .extensions = "xml",
+ .priv_data_size = sizeof(WebMDashMuxContext),
+ .write_header = webm_dash_manifest_write_header,
+ .write_packet = webm_dash_manifest_write_packet,
+ .write_trailer = webm_dash_manifest_write_trailer,
+ .priv_class = &webm_dash_class,
+};
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-12 02:38:37 +0000