--- /dev/null
+diff --git a/configure b/configure
+index 6dc0b7aad3..5a63240096 100755
+--- a/configure
++++ b/configure
+@@ -274,6 +274,7 @@ External library support:
+ --enable-libxcb-shape enable X11 grabbing shape rendering [autodetect]
+ --enable-libxvid enable Xvid encoding via xvidcore,
+ native MPEG-4/Xvid encoder exists [no]
++ --enable-libxml2 enable XML parsing using the C library libxml2 [no]
+ --enable-libzimg enable z.lib, needed for zscale filter [no]
+ --enable-libzmq enable message passing via libzmq [no]
+ --enable-libzvbi enable teletext support via libzvbi [no]
+@@ -1581,6 +1582,7 @@ EXTERNAL_LIBRARY_LIST="
+ libvpx
+ libwavpack
+ libwebp
++ libxml2
+ libzimg
+ libzmq
+ libzvbi
+@@ -2916,6 +2918,7 @@ avi_muxer_select="riffenc"
+ caf_demuxer_select="iso_media riffdec"
+ caf_muxer_select="iso_media"
+ dash_muxer_select="mp4_muxer"
++dash_demuxer_deps="libxml2"
+ dirac_demuxer_select="dirac_parser"
+ dts_demuxer_select="dca_parser"
+ dtshd_demuxer_select="dca_parser"
+@@ -5921,6 +5924,7 @@ enabled openssl && { use_pkg_config openssl openssl/ssl.h OPENSSL_init
+ check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
+ die "ERROR: openssl not found"; }
+ enabled qtkit_indev && { check_header_objcc QTKit/QTKit.h || disable qtkit_indev; }
++enabled libxml2 && require_pkg_config libxml-2.0 libxml2/libxml/xmlversion.h xmlCheckVersion
+
+ # libdc1394 check
+ if enabled libdc1394; then
+diff --git a/libavformat/Makefile b/libavformat/Makefile
+index a1dae894fe..37b9838956 100644
+--- a/libavformat/Makefile
++++ b/libavformat/Makefile
+@@ -135,6 +135,7 @@ OBJS-$(CONFIG_CRC_MUXER) += crcenc.o
+ OBJS-$(CONFIG_DATA_DEMUXER) += rawdec.o
+ OBJS-$(CONFIG_DATA_MUXER) += rawenc.o
+ OBJS-$(CONFIG_DASH_MUXER) += dashenc.o
++OBJS-$(CONFIG_DASH_DEMUXER) += dashdec.o
+ OBJS-$(CONFIG_DAUD_DEMUXER) += dauddec.o
+ OBJS-$(CONFIG_DAUD_MUXER) += daudenc.o
+ OBJS-$(CONFIG_DCSTR_DEMUXER) += dcstr.o
+diff --git a/libavformat/allformats.c b/libavformat/allformats.c
+index 09e62c3cfc..d57314ba9e 100644
+--- a/libavformat/allformats.c
++++ b/libavformat/allformats.c
+@@ -96,7 +96,7 @@ static void register_all(void)
+ REGISTER_DEMUXER (CINE, cine);
+ REGISTER_DEMUXER (CONCAT, concat);
+ REGISTER_MUXER (CRC, crc);
+- REGISTER_MUXER (DASH, dash);
++ REGISTER_MUXDEMUX(DASH, dash);
+ REGISTER_MUXDEMUX(DATA, data);
+ REGISTER_MUXDEMUX(DAUD, daud);
+ REGISTER_DEMUXER (DCSTR, dcstr);
+diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c
+new file mode 100644
+index 0000000000..d325dcb2b0
+--- /dev/null
++++ b/libavformat/dashdec.c
+@@ -0,0 +1,1800 @@
++/*
++ * Dynamic Adaptive Streaming over HTTP demux
++ * Copyright (c) 2017 samsamsam@o2.pl based on HLS demux
++ * Copyright (c) 2017 Steven Liu
++ *
++ * 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 <libxml/parser.h>
++#include "libavutil/intreadwrite.h"
++#include "libavutil/opt.h"
++#include "libavutil/time.h"
++#include "libavutil/parseutils.h"
++#include "internal.h"
++#include "avio_internal.h"
++
++#define INITIAL_BUFFER_SIZE 32768
++
++struct fragment {
++ int64_t url_offset;
++ int64_t size;
++ char *url;
++};
++
++/*
++ * reference to : ISO_IEC_23009-1-DASH-2012
++ * Section: 5.3.9.6.2
++ * Table: Table 17 — Semantics of SegmentTimeline element
++ * */
++struct timeline {
++ /* t: Element or Attribute Name
++ * specifies the MPD start time, in @timescale units,
++ * the first Segment in the series starts relative to the beginning of the Period.
++ * The value of this attribute must be equal to or greater than the sum of the previous S
++ * element earliest presentation time and the sum of the contiguous Segment durations.
++ * If the value of the attribute is greater than what is expressed by the previous S element,
++ * it expresses discontinuities in the timeline.
++ * If not present then the value shall be assumed to be zero for the first S element
++ * and for the subsequent S elements, the value shall be assumed to be the sum of
++ * the previous S element's earliest presentation time and contiguous duration
++ * (i.e. previous S@t + @d * (@r + 1)).
++ * */
++ int64_t t;
++ /* r: Element or Attribute Name
++ * specifies the repeat count of the number of following contiguous Segments with
++ * the same duration expressed by the value of @d. This value is zero-based
++ * (e.g. a value of three means four Segments in the contiguous series).
++ * */
++ int64_t r;
++ /* d: Element or Attribute Name
++ * specifies the Segment duration, in units of the value of the @timescale.
++ * */
++ int64_t d;
++};
++
++enum DASHTmplUrlType {
++ TMP_URL_TYPE_UNSPECIFIED,
++ TMP_URL_TYPE_NUMBER,
++ TMP_URL_TYPE_TIME,
++};
++
++/*
++ * Each playlist has its own demuxer. If it is currently active,
++ * it has an opened AVIOContext too, and potentially an AVPacket
++ * containing the next packet from this stream.
++ */
++struct representation {
++ char *url_template;
++ enum DASHTmplUrlType tmp_url_type;
++ AVIOContext pb;
++ AVIOContext *input;
++ AVFormatContext *parent;
++ AVFormatContext *ctx;
++ AVPacket pkt;
++ int rep_idx;
++ int rep_count;
++ int stream_index;
++
++ enum AVMediaType type;
++ int64_t target_duration;
++
++ int n_fragments;
++ struct fragment **fragments; /* VOD list of fragment for profile */
++
++ int n_timelines;
++ struct timeline **timelines;
++
++ int64_t first_seq_no;
++ int64_t last_seq_no;
++
++ int64_t fragment_duration;
++ int64_t fragment_timescale;
++
++ int64_t cur_seq_no;
++ int64_t cur_seg_offset;
++ int64_t cur_seg_size;
++ struct fragment *cur_seg;
++
++ /* Currently active Media Initialization Section */
++ struct fragment *init_section;
++ uint8_t *init_sec_buf;
++ uint32_t init_sec_buf_size;
++ uint32_t init_sec_data_len;
++ uint32_t init_sec_buf_read_offset;
++ int fix_multiple_stsd_order;
++ int64_t cur_timestamp;
++};
++
++typedef struct DASHContext {
++ const AVClass *class;
++ char *base_url;
++ struct representation *cur_video;
++ struct representation *cur_audio;
++ uint64_t media_presentation_duration_sec;
++ uint64_t suggested_presentation_delay_sec;
++ uint64_t presentation_delay_sec;
++ uint64_t availability_start_time_sec;
++ uint64_t publish_time_sec;
++ uint64_t minimum_update_period_sec;
++ uint64_t time_shift_buffer_depth_sec;
++ uint64_t min_buffer_time_sec;
++ uint64_t period_duration_sec;
++ uint64_t period_start_sec;
++ int is_live;
++ AVIOInterruptCB *interrupt_callback;
++ char *user_agent; ///< holds HTTP user agent set as an AVOption to the HTTP protocol context
++ char *cookies; ///< holds HTTP cookie values set in either the initial response or as an AVOption to the HTTP protocol context
++ char *headers; ///< holds HTTP headers set as an AVOption to the HTTP protocol context
++ AVDictionary *avio_opts;
++} DASHContext;
++
++static uint64_t get_current_time_in_sec(void)
++{
++ return av_gettime() / 1000000;
++}
++
++static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char *datetime)
++{
++ struct tm timeinfo;
++ int year = 0;
++ int month = 0;
++ int day = 0;
++ int hour = 0;
++ int minute = 0;
++ int ret = 0;
++ float second = 0.0;
++
++ /* ISO-8601 date parser */
++ if (!datetime)
++ return 0;
++
++ ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second);
++ /* year, month, day, hour, minute, second 6 arguments */
++ if (ret != 6) {
++ av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong time format\n");
++ }
++ timeinfo.tm_year = year - 1900;
++ timeinfo.tm_mon = month - 1;
++ timeinfo.tm_mday = day;
++ timeinfo.tm_hour = hour;
++ timeinfo.tm_min = minute;
++ timeinfo.tm_sec = (int)second;
++
++ return av_timegm(&timeinfo);
++}
++
++static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
++{
++ /* ISO-8601 duration parser */
++ uint32_t days = 0;
++ uint32_t hours = 0;
++ uint32_t mins = 0;
++ uint32_t secs = 0;
++ uint32_t size = 0;
++ float value = 0;
++ uint8_t type = 0;
++ const char *ptr = duration;
++
++ while (*ptr) {
++ if (*ptr == 'P' || *ptr == 'T') {
++ ptr++;
++ continue;
++ }
++
++ if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
++ av_log(s, AV_LOG_WARNING, "get_duration_insec get a wrong time format\n");
++ return 0; /* parser error */
++ }
++ switch (type) {
++ case 'D':
++ days = (uint32_t)value;
++ break;
++ case 'H':
++ hours = (uint32_t)value;
++ break;
++ case 'M':
++ mins = (uint32_t)value;
++ break;
++ case 'S':
++ secs = (uint32_t)value;
++ break;
++ default:
++ // handle invalid type
++ break;
++ }
++ ptr += size;
++ }
++ return ((days * 24 + hours) * 60 + mins) * 60 + secs;
++}
++
++static void free_fragment(struct fragment **seg)
++{
++ if (!(*seg)) {
++ return;
++ }
++ av_freep(&(*seg)->url);
++ av_freep(seg);
++}
++
++static void free_fragment_list(struct representation *pls)
++{
++ int i;
++
++ for (i = 0; i < pls->n_fragments; i++) {
++ free_fragment(&pls->fragments[i]);
++ }
++ av_freep(&pls->fragments);
++ pls->n_fragments = 0;
++}
++
++static void free_timelines_list(struct representation *pls)
++{
++ int i;
++
++ for (i = 0; i < pls->n_timelines; i++) {
++ av_freep(&pls->timelines[i]);
++ }
++ av_freep(&pls->timelines);
++ pls->n_timelines = 0;
++}
++
++/*
++ * Used to reset a statically allocated AVPacket to a clean slate,
++ * containing no data.
++ */
++static void reset_packet(AVPacket *pkt)
++{
++ av_init_packet(pkt);
++ pkt->data = NULL;
++}
++
++static void free_representation(struct representation *pls)
++{
++ free_fragment_list(pls);
++ free_timelines_list(pls);
++ free_fragment(&pls->cur_seg);
++ free_fragment(&pls->init_section);
++ av_freep(&pls->init_sec_buf);
++ av_packet_unref(&pls->pkt);
++ reset_packet(&pls->pkt);
++ av_freep(&pls->pb.buffer);
++ if (pls->input)
++ ff_format_io_close(pls->parent, &pls->input);
++ if (pls->ctx) {
++ pls->ctx->pb = NULL;
++ avformat_close_input(&pls->ctx);
++ }
++
++ av_free(pls->url_template);
++ av_free(pls);
++}
++
++static void update_options(char **dest, const char *name, void *src)
++{
++ av_freep(dest);
++ av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest);
++ if (*dest)
++ av_freep(dest);
++}
++
++static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
++ AVDictionary *opts, AVDictionary *opts2, int *is_http)
++{
++ DASHContext *c = s->priv_data;
++ AVDictionary *tmp = NULL;
++ const char *proto_name = NULL;
++ int ret;
++ void *p = NULL;
++
++ av_dict_copy(&tmp, opts, 0);
++ av_dict_copy(&tmp, opts2, 0);
++
++ if (av_strstart(url, "crypto", NULL)) {
++ if (url[6] == '+' || url[6] == ':')
++ proto_name = avio_find_protocol_name(url + 7);
++ }
++
++ if (!proto_name)
++ proto_name = avio_find_protocol_name(url);
++
++ if (!proto_name)
++ return AVERROR_INVALIDDATA;
++
++ // only http(s) & file are allowed
++ if (!av_strstart(proto_name, "http", NULL) && !av_strstart(proto_name, "file", NULL)) {
++ return AVERROR_INVALIDDATA;
++ }
++ if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':') {
++ ;
++ } else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':') {
++ ;
++ } else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5)) {
++ return AVERROR_INVALIDDATA;
++ }
++ ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
++ if (ret >= 0) {
++ // update cookies on http response with setcookies.
++ p = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
++ update_options(&c->cookies, "cookies", p);
++ av_dict_set(&opts, "cookies", c->cookies, 0);
++ }
++
++ av_dict_free(&tmp);
++
++ if (is_http)
++ *is_http = av_strstart(proto_name, "http", NULL);
++
++ return ret;
++
++}
++
++static char *replace_template_str(const char *url, const char *marker)
++{
++ char *prefix = NULL;
++ char *start = 0;
++ char *end = NULL;
++ char *tmp_url = NULL;
++ int marker_len;
++
++ prefix = av_strdup(marker);
++ marker_len = strlen(prefix) - 1;
++ prefix[marker_len] = '\0';
++
++ start = av_stristr(url, prefix);
++ if (!start)
++ goto finish;
++ end = strchr(start + 1, '$');
++ if (!end)
++ goto finish;
++
++ tmp_url = av_mallocz(MAX_URL_SIZE);
++ if (!tmp_url) {
++ return NULL;
++ }
++
++ av_strlcpy(tmp_url, url, start - url+ 1);
++ av_strlcat(tmp_url, start + marker_len, strlen(tmp_url) + end - start - marker_len + 1);
++ av_strlcat(tmp_url, end + 1, MAX_URL_SIZE);
++
++finish:
++ av_free(prefix);
++ return tmp_url;
++}
++
++static char *get_content_url(xmlNodePtr *baseurl_nodes,
++ int n_baseurl_nodes,
++ xmlChar *rep_id_val,
++ xmlChar *rep_bandwidth_val,
++ xmlChar *val)
++{
++ int i;
++ xmlChar *text;
++ char *url = NULL;
++ char *tmp_str = av_mallocz(MAX_URL_SIZE);
++ char *tmp_str_2 = NULL;
++
++ if (!tmp_str) {
++ return NULL;
++ }
++ for (i = 0; i < n_baseurl_nodes; ++i) {
++ if (baseurl_nodes[i] &&
++ baseurl_nodes[i]->children &&
++ baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
++ text = xmlNodeGetContent(baseurl_nodes[i]->children);
++ if (text) {
++ tmp_str_2 = av_mallocz(MAX_URL_SIZE);
++ if (!tmp_str_2) {
++ av_free(tmp_str);
++ return NULL;
++ }
++ ff_make_absolute_url(tmp_str_2, MAX_URL_SIZE, tmp_str, text);
++ av_free(tmp_str);
++ tmp_str = tmp_str_2;
++ xmlFree(text);
++ }
++ }
++ }
++ if (val)
++ av_strlcat(tmp_str, (const char*)val, MAX_URL_SIZE);
++
++ if (rep_id_val) {
++ url = av_strireplace(tmp_str, "$RepresentationID$", (const char*)rep_id_val);
++ av_free(tmp_str);
++ tmp_str = url;
++ }
++ if (rep_bandwidth_val && tmp_str)
++ url = av_strireplace(tmp_str, "$Bandwidth$", (const char*)rep_bandwidth_val);
++ if (tmp_str != url)
++ av_free(tmp_str);
++ return url;
++}
++
++static xmlChar *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const xmlChar *attrname)
++{
++ int i;
++ xmlChar *val;
++
++ for (i = 0; i < n_nodes; ++i) {
++ if (nodes[i]) {
++ val = xmlGetProp(nodes[i], attrname);
++ if (val)
++ return val;
++ }
++ }
++
++ return NULL;
++}
++
++static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const xmlChar *nodename)
++{
++ xmlNodePtr node = rootnode;
++ if (!node) {
++ return NULL;
++ }
++
++ node = xmlFirstElementChild(node);
++ while (node) {
++ if (!xmlStrcmp(node->name, nodename)) {
++ return node;
++ }
++ node = xmlNextElementSibling(node);
++ }
++ return NULL;
++}
++
++static void check_full_number(struct representation *rep)
++{
++ char *temp_string = NULL;
++
++ if (av_stristr(rep->url_template, "$Number$")) {
++ temp_string = av_strireplace(rep->url_template, "$Number$", "$Number%d$");
++ av_free(rep->url_template);
++ rep->url_template = temp_string;
++ }
++}
++
++static enum AVMediaType get_content_type(xmlNodePtr node)
++{
++ enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
++ int i = 0;
++ const char *attr;
++
++ if (node) {
++ while (type == AVMEDIA_TYPE_UNKNOWN && i < 2) {
++ attr = (i) ? "mimeType" : "contentType";
++ xmlChar *val = xmlGetProp(node, attr);
++ if (val) {
++ if (av_stristr((const char *)val, "video")) {
++ type = AVMEDIA_TYPE_VIDEO;
++ } else if (av_stristr((const char *)val, "audio")) {
++ type = AVMEDIA_TYPE_AUDIO;
++ }
++ xmlFree(val);
++ }
++ i++;
++ }
++ }
++ return type;
++}
++
++static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep,
++ xmlNodePtr fragmenturl_node,
++ xmlNodePtr *baseurl_nodes,
++ xmlChar *rep_id_val,
++ xmlChar *rep_bandwidth_val)
++{
++ xmlChar *initialization_val = NULL;
++ xmlChar *media_val = NULL;
++
++ if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar *)"Initialization")) {
++ initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
++ if (initialization_val) {
++ rep->init_section = av_mallocz(sizeof(struct fragment));
++ if (!rep->init_section) {
++ xmlFree(initialization_val);
++ return AVERROR(ENOMEM);
++ }
++ rep->init_section->url = get_content_url(baseurl_nodes, 4,
++ rep_id_val,
++ rep_bandwidth_val,
++ initialization_val);
++ if (!rep->init_section->url) {
++ av_free(rep->init_section);
++ xmlFree(initialization_val);
++ return AVERROR(ENOMEM);
++ }
++ rep->init_section->size = -1;
++ xmlFree(initialization_val);
++ }
++ } else if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar *)"SegmentURL")) {
++ media_val = xmlGetProp(fragmenturl_node, "media");
++ if (media_val) {
++ struct fragment *seg = av_mallocz(sizeof(struct fragment));
++ if (!seg) {
++ xmlFree(media_val);
++ return AVERROR(ENOMEM);
++ }
++ seg->url = get_content_url(baseurl_nodes, 4,
++ rep_id_val,
++ rep_bandwidth_val,
++ media_val);
++ if (!seg->url) {
++ av_free(seg);
++ xmlFree(media_val);
++ return AVERROR(ENOMEM);
++ }
++ seg->size = -1;
++ dynarray_add(&rep->fragments, &rep->n_fragments, seg);
++ xmlFree(media_val);
++ }
++ }
++
++ return 0;
++}
++
++static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep,
++ xmlNodePtr fragment_timeline_node)
++{
++ xmlAttrPtr attr = NULL;
++ xmlChar *val = NULL;
++
++ if (!xmlStrcmp(fragment_timeline_node->name, (const xmlChar *)"S")) {
++ struct timeline *tml = av_mallocz(sizeof(struct timeline));
++ if (!tml) {
++ return AVERROR(ENOMEM);
++ }
++ attr = fragment_timeline_node->properties;
++ while (attr) {
++ val = xmlGetProp(fragment_timeline_node, attr->name);
++
++ if (!val) {
++ av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name);
++ continue;
++ }
++
++ if (!xmlStrcmp(attr->name, (const xmlChar *)"t")) {
++ tml->t = (int64_t)strtoll(val, NULL, 10);
++ } else if (!xmlStrcmp(attr->name, (const xmlChar *)"r")) {
++ tml->r =(int64_t) strtoll(val, NULL, 10);
++ } else if (!xmlStrcmp(attr->name, (const xmlChar *)"d")) {
++ tml->d = (int64_t)strtoll(val, NULL, 10);
++ rep->fragment_duration = (int64_t) strtoll(val, NULL, 10);
++ }
++ attr = attr->next;
++ xmlFree(val);
++ }
++ dynarray_add(&rep->timelines, &rep->n_timelines, tml);
++ }
++
++ return 0;
++}
++
++static int parse_manifest_representation(AVFormatContext *s, const char *url,
++ xmlNodePtr node,
++ xmlNodePtr adaptionset_node,
++ xmlNodePtr mpd_baseurl_node,
++ xmlNodePtr period_baseurl_node,
++ xmlNodePtr fragment_template_node,
++ xmlNodePtr content_component_node,
++ xmlNodePtr adaptionset_baseurl_node)
++{
++ int32_t ret = 0;
++ int32_t audio_rep_idx = 0;
++ int32_t video_rep_idx = 0;
++ char *temp_string = NULL;
++ DASHContext *c = s->priv_data;
++ struct representation *rep = NULL;
++ struct fragment *seg = NULL;
++ xmlNodePtr representation_segmenttemplate_node = NULL;
++ xmlNodePtr representation_baseurl_node = NULL;
++ xmlNodePtr representation_segmentlist_node = NULL;
++ xmlNodePtr fragment_timeline_node = NULL;
++ xmlNodePtr fragment_templates_tab[2];
++ xmlChar *duration_val = NULL;
++ xmlChar *startnumber_val = NULL;
++ xmlChar *timescale_val = NULL;
++ xmlChar *initialization_val = NULL;
++ xmlChar *media_val = NULL;
++ xmlNodePtr baseurl_nodes[4];
++ xmlNodePtr representation_node = node;
++ xmlChar *rep_id_val = xmlGetProp(representation_node, "id");
++ xmlChar *rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
++ enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
++
++ // try get information from representation
++ if (type == AVMEDIA_TYPE_UNKNOWN)
++ type = get_content_type(representation_node);
++ // try get information from contentComponen
++ if (type == AVMEDIA_TYPE_UNKNOWN)
++ type = get_content_type(content_component_node);
++ // try get information from adaption set
++ if (type == AVMEDIA_TYPE_UNKNOWN)
++ type = get_content_type(adaptionset_node);
++ if (type == AVMEDIA_TYPE_UNKNOWN) {
++ av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
++ } else if ((type == AVMEDIA_TYPE_VIDEO && !c->cur_video) || (type == AVMEDIA_TYPE_AUDIO && !c->cur_audio)) {
++ // convert selected representation to our internal struct
++ rep = av_mallocz(sizeof(struct representation));
++ if (!rep) {
++ ret = AVERROR(ENOMEM);
++ goto end;
++ }
++ representation_segmenttemplate_node = find_child_node_by_name(representation_node, "SegmentTemplate");
++ representation_baseurl_node = find_child_node_by_name(representation_node, "BaseURL");
++ representation_segmentlist_node = find_child_node_by_name(representation_node, "SegmentList");
++ reset_packet(&rep->pkt);
++
++ baseurl_nodes[0] = mpd_baseurl_node;
++ baseurl_nodes[1] = period_baseurl_node;
++ baseurl_nodes[2] = adaptionset_baseurl_node;
++ baseurl_nodes[3] = representation_baseurl_node;
++
++ if (representation_segmenttemplate_node || fragment_template_node) {
++ fragment_timeline_node = NULL;
++ fragment_templates_tab[0] = representation_segmenttemplate_node;
++ fragment_templates_tab[1] = fragment_template_node;
++
++ duration_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "duration");
++ startnumber_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "startNumber");
++ timescale_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "timescale");
++ initialization_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "initialization");
++ media_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "media");
++
++ if (initialization_val) {
++ rep->init_section = av_mallocz(sizeof(struct fragment));
++ if (!rep->init_section) {
++ av_free(rep);
++ ret = AVERROR(ENOMEM);
++ goto end;
++ }
++ rep->init_section->url = get_content_url(baseurl_nodes, 4,
++ rep_id_val,
++ rep_bandwidth_val,
++ initialization_val);
++ if (!rep->init_section->url) {
++ av_free(rep->init_section);
++ av_free(rep);
++ ret = AVERROR(ENOMEM);
++ goto end;
++ }
++ rep->init_section->size = -1;
++ xmlFree(initialization_val);
++ }
++
++ if (media_val) {
++ rep->url_template = get_content_url(baseurl_nodes, 4,
++ rep_id_val,
++ rep_bandwidth_val,
++ media_val);
++ temp_string = rep->url_template;
++ if (temp_string) {
++ if (av_stristr(temp_string, "$Number")) {
++ rep->tmp_url_type = TMP_URL_TYPE_NUMBER; /* Number-Based. */
++ check_full_number(rep);
++ } else if (av_stristr(temp_string, "$Time")) {
++ rep->tmp_url_type = TMP_URL_TYPE_TIME; /* Time-Based. */
++ } else {
++ temp_string = NULL;
++ }
++ }
++ xmlFree(media_val);
++ }
++ if (duration_val) {
++ rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
++ xmlFree(duration_val);
++ }
++ if (timescale_val) {
++ rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
++ xmlFree(timescale_val);
++ }
++ if (startnumber_val) {
++ rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
++ xmlFree(startnumber_val);
++ }
++
++ fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
++
++ if (!fragment_timeline_node)
++ fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
++ if (fragment_timeline_node) {
++ fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node);
++ while (fragment_timeline_node) {
++ ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node);
++ if (ret < 0) {
++ return ret;
++ }
++ fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
++ }
++ }
++ } else if (representation_baseurl_node && !representation_segmentlist_node) {
++ seg = av_mallocz(sizeof(struct fragment));
++ if (!seg) {
++ ret = AVERROR(ENOMEM);
++ goto end;
++ }
++ seg->url = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, NULL);
++ if (!seg->url) {
++ av_free(seg);
++ ret = AVERROR(ENOMEM);
++ goto end;
++ }
++ seg->size = -1;
++ dynarray_add(&rep->fragments, &rep->n_fragments, seg);
++ } else if (!representation_baseurl_node && representation_segmentlist_node) {
++ // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html
++ // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
++ xmlNodePtr fragmenturl_node = NULL;
++ duration_val = xmlGetProp(representation_segmentlist_node, "duration");
++ timescale_val = xmlGetProp(representation_segmentlist_node, "timescale");
++ if (duration_val) {
++ rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
++ xmlFree(duration_val);
++ }
++ if (timescale_val) {
++ rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
++ xmlFree(timescale_val);
++ }
++ fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node);
++ while (fragmenturl_node) {
++ ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node,
++ baseurl_nodes,
++ rep_id_val,
++ rep_bandwidth_val);
++ if (ret < 0) {
++ return ret;
++ }
++ fragmenturl_node = xmlNextElementSibling(fragmenturl_node);
++ }
++ } else {
++ free_representation(rep);
++ rep = NULL;
++ av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", (const char *)rep_id_val);
++ }
++
++ if (rep) {
++ if (rep->fragment_duration > 0 && !rep->fragment_timescale)
++ rep->fragment_timescale = 1;
++ if (type == AVMEDIA_TYPE_VIDEO) {
++ rep->rep_idx = video_rep_idx;
++ c->cur_video = rep;
++ } else {
++ rep->rep_idx = audio_rep_idx;
++ c->cur_audio = rep;
++ }
++ }
++ }
++
++ video_rep_idx += type == AVMEDIA_TYPE_VIDEO;
++ audio_rep_idx += type == AVMEDIA_TYPE_AUDIO;
++
++end:
++ if (rep_id_val)
++ xmlFree(rep_id_val);
++ if (rep_bandwidth_val)
++ xmlFree(rep_bandwidth_val);
++
++ return ret;
++}
++
++static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
++ xmlNodePtr adaptionset_node,
++ xmlNodePtr mpd_baseurl_node,
++ xmlNodePtr period_baseurl_node)
++{
++ int ret = 0;
++ xmlNodePtr fragment_template_node = NULL;
++ xmlNodePtr content_component_node = NULL;
++ xmlNodePtr adaptionset_baseurl_node = NULL;
++ xmlNodePtr node = NULL;
++
++ node = xmlFirstElementChild(adaptionset_node);
++ while (node) {
++ if (!xmlStrcmp(node->name, (const xmlChar *)"SegmentTemplate")) {
++ fragment_template_node = node;
++ } else if (!xmlStrcmp(node->name, (const xmlChar *)"ContentComponent")) {
++ content_component_node = node;
++ } else if (!xmlStrcmp(node->name, (const xmlChar *)"BaseURL")) {
++ adaptionset_baseurl_node = node;
++ } else if (!xmlStrcmp(node->name, (const xmlChar *)"Representation")) {
++ ret = parse_manifest_representation(s, url, node,
++ adaptionset_node,
++ mpd_baseurl_node,
++ period_baseurl_node,
++ fragment_template_node,
++ content_component_node,
++ adaptionset_baseurl_node);
++ if (ret < 0) {
++ return ret;
++ }
++ }
++ node = xmlNextElementSibling(node);
++ }
++ return 0;
++}
++
++
++static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
++{
++ DASHContext *c = s->priv_data;
++ int ret = 0;
++ int close_in = 0;
++ uint8_t *new_url = NULL;
++ int64_t filesize = 0;
++ char *buffer = NULL;
++ AVDictionary *opts = NULL;
++ xmlDoc *doc = NULL;
++ xmlNodePtr root_element = NULL;
++ xmlNodePtr node = NULL;
++ xmlNodePtr period_node = NULL;
++ xmlNodePtr mpd_baseurl_node = NULL;
++ xmlNodePtr period_baseurl_node = NULL;
++ xmlNodePtr adaptionset_node = NULL;
++ xmlAttrPtr attr = NULL;
++ xmlChar *val = NULL;
++ uint32_t perdiod_duration_sec = 0;
++ uint32_t perdiod_start_sec = 0;
++ int32_t audio_rep_idx = 0;
++ int32_t video_rep_idx = 0;
++
++ if (!in) {
++ close_in = 1;
++ /* This is XML manifest there is no need to set range header */
++ av_dict_set(&opts, "seekable", "0", 0);
++ // broker prior HTTP options that should be consistent across requests
++ av_dict_set(&opts, "user-agent", c->user_agent, 0);
++ av_dict_set(&opts, "cookies", c->cookies, 0);
++ av_dict_set(&opts, "headers", c->headers, 0);
++
++ ret = avio_open2(&in, url, AVIO_FLAG_READ, c->interrupt_callback, &opts);
++ av_dict_free(&opts);
++ if (ret < 0)
++ return ret;
++ }
++
++ if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0) {
++ c->base_url = av_strdup(new_url);
++ } else {
++ c->base_url = av_strdup(url);
++ }
++
++ filesize = avio_size(in);
++ if (filesize <= 0) {
++ filesize = 8 * 1024;
++ }
++
++ buffer = av_mallocz(filesize);
++ if (!buffer) {
++ return AVERROR(ENOMEM);
++ }
++
++ filesize = avio_read(in, buffer, filesize);
++ if (filesize > 0) {
++ LIBXML_TEST_VERSION
++
++ doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0);
++ root_element = xmlDocGetRootElement(doc);
++ node = root_element;
++
++ if (!node) {
++ ret = AVERROR_INVALIDDATA;
++ av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
++ goto cleanup;
++ }
++
++ if (node->type != XML_ELEMENT_NODE ||
++ xmlStrcmp(node->name, (const xmlChar *)"MPD")) {
++ ret = AVERROR_INVALIDDATA;
++ av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
++ goto cleanup;
++ }
++
++ val = xmlGetProp(node, "type");
++ if (!val) {
++ av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
++ ret = AVERROR_INVALIDDATA;
++ goto cleanup;
++ }
++ if (!xmlStrcmp(val, (const xmlChar *)"dynamic"))
++ c->is_live = 1;
++ xmlFree(val);
++
++ attr = node->properties;
++ while (attr) {
++ val = xmlGetProp(node, attr->name);
++
++ if (!xmlStrcmp(attr->name, (const xmlChar *)"availabilityStartTime")) {
++ c->availability_start_time_sec = get_utc_date_time_insec(s, (const char *)val);
++ } else if (!xmlStrcmp(attr->name, (const xmlChar *)"publishTime")) {
++ c->publish_time_sec = get_utc_date_time_insec(s, (const char *)val);
++ } else if (!xmlStrcmp(attr->name, (const xmlChar *)"minimumUpdatePeriod")) {
++ c->minimum_update_period_sec = get_duration_insec(s, (const char *)val);
++ } else if (!xmlStrcmp(attr->name, (const xmlChar *)"timeShiftBufferDepth")) {
++ c->time_shift_buffer_depth_sec = get_duration_insec(s, (const char *)val);
++ } else if (!xmlStrcmp(attr->name, (const xmlChar *)"minBufferTime")) {
++ c->min_buffer_time_sec = get_duration_insec(s, (const char *)val);
++ } else if (!xmlStrcmp(attr->name, (const xmlChar *)"suggestedPresentationDelay")) {
++ c->suggested_presentation_delay_sec = get_duration_insec(s, (const char *)val);
++ } else if (!xmlStrcmp(attr->name, (const xmlChar *)"mediaPresentationDuration")) {
++ c->media_presentation_duration_sec = get_duration_insec(s, (const char *)val);
++ }
++ attr = attr->next;
++ xmlFree(val);
++ }
++
++ mpd_baseurl_node = find_child_node_by_name(node, "BaseURL");
++
++ // at now we can handle only one period, with the longest duration
++ node = xmlFirstElementChild(node);
++ while (node) {
++ if (!xmlStrcmp(node->name, (const xmlChar *)"Period")) {
++ perdiod_duration_sec = 0;
++ perdiod_start_sec = 0;
++ attr = node->properties;
++ while (attr) {
++ val = xmlGetProp(node, attr->name);
++ if (!xmlStrcmp(attr->name, (const xmlChar *)"duration")) {
++ perdiod_duration_sec = get_duration_insec(s, (const char *)val);
++ } else if (!xmlStrcmp(attr->name, (const xmlChar *)"start")) {
++ perdiod_start_sec = get_duration_insec(s, (const char *)val);
++ }
++ attr = attr->next;
++ xmlFree(val);
++ }
++ if ((perdiod_duration_sec) >= (c->period_duration_sec)) {
++ period_node = node;
++ c->period_duration_sec = perdiod_duration_sec;
++ c->period_start_sec = perdiod_start_sec;
++ if (c->period_start_sec > 0)
++ c->media_presentation_duration_sec = c->period_duration_sec;
++ }
++ }
++ node = xmlNextElementSibling(node);
++ }
++ if (!period_node) {
++ av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
++ ret = AVERROR_INVALIDDATA;
++ goto cleanup;
++ }
++
++ adaptionset_node = xmlFirstElementChild(period_node);
++ while (adaptionset_node) {
++ if (!xmlStrcmp(adaptionset_node->name, (const xmlChar *)"BaseURL")) {
++ period_baseurl_node = adaptionset_node;
++ } else if (!xmlStrcmp(adaptionset_node->name, (const xmlChar *)"AdaptationSet")) {
++ parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node);
++ }
++ adaptionset_node = xmlNextElementSibling(adaptionset_node);
++ }
++ if (c->cur_video) {
++ c->cur_video->rep_count = video_rep_idx;
++ c->cur_video->fix_multiple_stsd_order = 1;
++ av_log(s, AV_LOG_VERBOSE, "rep_idx[%d]\n", (int)c->cur_video->rep_idx);
++ av_log(s, AV_LOG_VERBOSE, "rep_count[%d]\n", (int)video_rep_idx);
++ }
++ if (c->cur_audio) {
++ c->cur_audio->rep_count = audio_rep_idx;
++ }
++
++cleanup:
++ /*free the document */
++ xmlFreeDoc(doc);
++ xmlCleanupParser();
++ } else {
++ av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", url);
++ ret = AVERROR_INVALIDDATA;
++ }
++
++ av_free(new_url);
++ av_free(buffer);
++ if (close_in) {
++ avio_close(in);
++ }
++ return ret;
++}
++
++static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
++{
++ DASHContext *c = pls->parent->priv_data;
++ int64_t num = 0;
++
++ if (c->is_live) {
++ num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time_sec) - c->presentation_delay_sec) * pls->fragment_timescale) / pls->fragment_duration;
++ } else {
++ num = pls->first_seq_no;
++ }
++ return num;
++}
++
++static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
++{
++ DASHContext *c = pls->parent->priv_data;
++ int64_t num = 0;
++
++ if (c->is_live) {
++ num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time_sec) - c->time_shift_buffer_depth_sec) * pls->fragment_timescale) / pls->fragment_duration;
++ } else {
++ num = pls->first_seq_no;
++ }
++ return num;
++}
++
++static int64_t calc_max_seg_no(AVFormatContext *s, struct representation *pls)
++{
++ DASHContext *c = pls->parent->priv_data;
++ int64_t num = 0;
++ int64_t i = 0;
++
++ if (c->is_live) {
++ num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time_sec)) * pls->fragment_timescale) / pls->fragment_duration;
++ } else {
++ if (pls->n_fragments) {
++ num = pls->first_seq_no + pls->n_fragments - 1;
++ } else if (pls->n_timelines) {
++ num = pls->first_seq_no + pls->n_timelines - 1;
++ for (i = 0; i < pls->n_timelines; ++i) {
++ num += pls->timelines[i]->r;
++ }
++ } else {
++ num = pls->first_seq_no + (c->media_presentation_duration_sec * pls->fragment_timescale) / pls->fragment_duration;
++ }
++ }
++
++ return num;
++}
++
++static int64_t get_fragment_start_time(struct representation *pls, int64_t cur_seq_no)
++{
++ int64_t i = 0;
++ int64_t j = 0;
++ int64_t num = 0;
++ int64_t startTime = 0;
++
++ if (pls->n_timelines) {
++ for (i = 0; i < pls->n_timelines; ++i) {
++ if (pls->timelines[i]->t > 0) {
++ startTime = pls->timelines[i]->t;
++ }
++ if (num == cur_seq_no)
++ goto finish;
++ startTime += pls->timelines[i]->d;
++ for (j = 0; j < pls->timelines[i]->r; ++j) {
++ num++;
++ if (num == cur_seq_no)
++ goto finish;
++ startTime += pls->timelines[i]->d;
++ }
++ num++;
++ }
++ }
++
++finish:
++ return startTime;
++}
++
++static struct fragment *get_current_fragment(struct representation *pls)
++{
++ int64_t tmp_val = 0;
++ int64_t min_seq_no = 0;
++ int64_t max_seq_no = 0;
++ char buffer[1024];
++ char *tmp_str = NULL;
++ struct fragment *seg = NULL;
++ struct fragment *seg_ptr = NULL;
++ DASHContext *c = pls->parent->priv_data;
++
++ if (pls->n_fragments > 0) {
++ if (pls->cur_seq_no < pls->n_fragments) {
++ seg_ptr = pls->fragments[pls->cur_seq_no];
++ seg = av_mallocz(sizeof(struct fragment));
++ if (!seg) {
++ return NULL;
++ }
++ seg->url = av_strdup(seg_ptr->url);
++ if (!seg->url) {
++ av_free(seg);
++ return NULL;
++ }
++ seg->size = seg_ptr->size;
++ seg->url_offset = seg_ptr->url_offset;
++ return seg;
++ }
++ }
++ if (c->is_live) {
++ while (1) {
++ min_seq_no = calc_min_seg_no(pls->parent, pls);
++ max_seq_no = calc_max_seg_no(pls->parent, pls);
++
++ if (pls->cur_seq_no <= min_seq_no) {
++ av_log(pls->parent, AV_LOG_VERBOSE, "old fragment: cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"], playlist %d\n",
++ (int64_t)pls->cur_seq_no, min_seq_no, max_seq_no, (int)pls->rep_idx);
++ pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls);
++ } else if (pls->cur_seq_no > max_seq_no) {
++ av_log(pls->parent, AV_LOG_VERBOSE, "new fragment: min[%"PRId64"] max[%"PRId64"], playlist %d\n",
++ min_seq_no, max_seq_no, (int)pls->rep_idx);
++ av_usleep(1000);
++ continue;
++ }
++ break;
++ }
++ seg = av_mallocz(sizeof(struct fragment));
++ if (!seg) {
++ return NULL;
++ }
++ } else if (pls->cur_seq_no <= pls->last_seq_no) {
++ seg = av_mallocz(sizeof(struct fragment));
++ if (!seg) {
++ return NULL;
++ }
++ }
++ if (seg) {
++ if (pls->tmp_url_type != TMP_URL_TYPE_UNSPECIFIED) {
++ tmp_val = pls->tmp_url_type == TMP_URL_TYPE_NUMBER ? pls->cur_seq_no : get_fragment_start_time(pls, pls->cur_seq_no);
++ if (av_get_frame_filename(buffer, sizeof(buffer), pls->url_template, (int64_t)tmp_val) < 0) {
++ av_log(pls->parent, AV_LOG_ERROR, "Invalid segment filename template %s\n", pls->url_template);
++ return NULL;
++ }
++
++ if (pls->tmp_url_type == TMP_URL_TYPE_NUMBER) {
++ tmp_str = replace_template_str(buffer, "$Number$");
++ } else if (pls->tmp_url_type == TMP_URL_TYPE_TIME) {
++ tmp_str = replace_template_str(buffer, "$Time$");
++ } else {
++ av_log(pls->parent, AV_LOG_ERROR, "Invalid tmp_url_type\n");
++ return NULL;
++ }
++
++ seg->url = av_strdup(tmp_str);
++ if (!seg->url) {
++ av_free(tmp_str);
++ return NULL;
++ }
++ } else {
++ av_log(pls->parent, AV_LOG_ERROR, "Unable to unable to resolve template url '%s'\n", pls->url_template);
++ seg->url = av_strdup(pls->url_template);
++ if (!seg->url) {
++ return NULL;
++ }
++ }
++ seg->size = -1;
++ }
++
++ av_free(tmp_str);
++ return seg;
++}
++
++enum ReadFromURLMode {
++ READ_NORMAL,
++ READ_COMPLETE,
++};
++
++static int read_from_url(struct representation *pls, struct fragment *seg,
++ uint8_t *buf, int buf_size,
++ enum ReadFromURLMode mode)
++{
++ int ret;
++
++ /* limit read if the fragment was only a part of a file */
++ if (seg->size >= 0)
++ buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset);
++
++ if (mode == READ_COMPLETE) {
++ ret = avio_read(pls->input, buf, buf_size);
++ if (ret < buf_size) {
++ av_log(pls->parent, AV_LOG_WARNING, "Could not read complete fragment.\n");
++ }
++ } else {
++ ret = avio_read(pls->input, buf, buf_size);
++ }
++ if (ret > 0)
++ pls->cur_seg_offset += ret;
++
++ return ret;
++}
++
++static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg)
++{
++ AVDictionary *opts = NULL;
++ char url[MAX_URL_SIZE];
++ int ret;
++
++ // broker prior HTTP options that should be consistent across requests
++ av_dict_set(&opts, "user-agent", c->user_agent, 0);
++ av_dict_set(&opts, "cookies", c->cookies, 0);
++ av_dict_set(&opts, "headers", c->headers, 0);
++ if (c->is_live) {
++ av_dict_set(&opts, "seekable", "0", 0);
++ }
++
++ if (seg->size >= 0) {
++ /* try to restrict the HTTP request to the part we want
++ * (if this is in fact a HTTP request) */
++ av_dict_set_int(&opts, "offset", seg->url_offset, 0);
++ av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
++ }
++
++ ff_make_absolute_url(url, MAX_URL_SIZE, c->base_url, seg->url);
++ av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64", playlist %d\n",
++ url, seg->url_offset, pls->rep_idx);
++ ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts, NULL);
++ if (ret < 0) {
++ goto cleanup;
++ }
++
++ /* Seek to the requested position. If this was a HTTP request, the offset
++ * should already be where want it to, but this allows e.g. local testing
++ * without a HTTP server. */
++ if (!ret && seg->url_offset) {
++ int64_t seekret = avio_seek(pls->input, seg->url_offset, SEEK_SET);
++ if (seekret < 0) {
++ av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of DASH fragment '%s'\n", seg->url_offset, seg->url);
++ ret = (int) seekret;
++ ff_format_io_close(pls->parent, &pls->input);
++ }
++ }
++
++cleanup:
++ av_dict_free(&opts);
++ pls->cur_seg_offset = 0;
++ pls->cur_seg_size = seg->size;
++ return ret;
++}
++
++static int update_init_section(struct representation *pls)
++{
++ static const int max_init_section_size = 1024*1024;
++ DASHContext *c = pls->parent->priv_data;
++ int64_t sec_size = 0;
++ int64_t urlsize = 0;
++ int ret = 0;
++
++ /* read init section only once per representation */
++ if (!pls->init_section || pls->init_sec_buf) {
++ return 0;
++ }
++
++ ret = open_input(c, pls, pls->init_section);
++ if (ret < 0) {
++ av_log(pls->parent, AV_LOG_WARNING, "Failed to open an initialization section in playlist %d\n", pls->rep_idx);
++ return ret;
++ }
++
++ if (pls->init_section->size >= 0) {
++ sec_size = pls->init_section->size;
++ } else if ((urlsize = avio_size(pls->input)) >= 0) {
++ sec_size = urlsize;
++ } else {
++ sec_size = max_init_section_size;
++ }
++ av_log(pls->parent, AV_LOG_DEBUG, "Downloading an initialization section of size %"PRId64"\n", sec_size);
++ sec_size = FFMIN(sec_size, max_init_section_size);
++ av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
++ ret = read_from_url(pls, pls->init_section, pls->init_sec_buf, pls->init_sec_buf_size, READ_COMPLETE);
++ ff_format_io_close(pls->parent, &pls->input);
++ if (ret < 0)
++ return ret;
++
++ if (pls->fix_multiple_stsd_order && pls->rep_idx > 0) {
++ uint8_t **stsd_entries = NULL;
++ int *stsd_entries_size = NULL;
++ int i = 4;
++
++ while (i <= (ret - 4)) {
++ // find start stsd atom
++ if (!memcmp(pls->init_sec_buf + i, "stsd", 4)) {
++ /* 1B version
++ * 3B flags
++ * 4B num of entries */
++ int stsd_first_offset = i + 8;
++ int stsd_offset = 0;
++ int j = 0;
++ uint32_t stsd_count = AV_RB32(pls->init_sec_buf + stsd_first_offset);
++ stsd_first_offset += 4;
++ if (stsd_count != pls->rep_count) {
++ i++;
++ continue;
++ }
++ // find all stsd entries
++ stsd_entries = av_mallocz_array(stsd_count, sizeof(*stsd_entries));
++ stsd_entries_size = av_mallocz_array(stsd_count, sizeof(*stsd_entries_size));
++ for (j = 0; j < stsd_count; ++j) {
++ /* 4B - size
++ * 4B - format */
++ stsd_entries_size[j] = AV_RB32(pls->init_sec_buf + stsd_first_offset + stsd_offset);
++ stsd_entries[j] = av_malloc(stsd_entries_size[j]);
++ memcpy(stsd_entries[j], pls->init_sec_buf + stsd_first_offset + stsd_offset, stsd_entries_size[j]);
++ stsd_offset += stsd_entries_size[j];
++ }
++ // reorder stsd entries
++ // as first put stsd entry for current representation
++ j = pls->rep_idx;
++ stsd_offset = stsd_first_offset;
++ memcpy(pls->init_sec_buf + stsd_offset, stsd_entries[j], stsd_entries_size[j]);
++ stsd_offset += stsd_entries_size[j];
++ for (j = 0; j < stsd_count; ++j) {
++ if (j != pls->rep_idx) {
++ memcpy(pls->init_sec_buf + stsd_offset, stsd_entries[j], stsd_entries_size[j]);
++ stsd_offset += stsd_entries_size[j];
++ }
++ av_free(stsd_entries[j]);
++ }
++ av_freep(&stsd_entries);
++ av_freep(&stsd_entries_size);
++ break;
++ }
++ i++;
++ }
++ }
++
++ av_log(pls->parent, AV_LOG_TRACE, "pls[%p] init section size[%d]\n", pls, (int)ret);
++ pls->init_sec_data_len = ret;
++ pls->init_sec_buf_read_offset = 0;
++
++ return 0;
++}
++
++static int64_t seek_data(void *opaque, int64_t offset, int whence)
++{
++ struct representation *v = opaque;
++ if (v->n_fragments && !v->init_sec_data_len) {
++ return avio_seek(v->input, offset, whence);
++ }
++
++ return AVERROR(ENOSYS);
++}
++
++static int read_data(void *opaque, uint8_t *buf, int buf_size)
++{
++ int ret = 0;
++ struct representation *v = opaque;
++ DASHContext *c = v->parent->priv_data;
++
++restart:
++ if (!v->input) {
++ free_fragment(&v->cur_seg);
++ v->cur_seg = get_current_fragment(v);
++ if (!v->cur_seg) {
++ ret = AVERROR_EOF;
++ goto end;
++ }
++
++ /* load/update Media Initialization Section, if any */
++ ret = update_init_section(v);
++ if (ret)
++ goto end;
++
++ ret = open_input(c, v, v->cur_seg);
++ if (ret < 0) {
++ if (ff_check_interrupt(c->interrupt_callback)) {
++ goto end;
++ ret = AVERROR_EXIT;
++ }
++ av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist %d\n", v->rep_idx);
++ v->cur_seq_no++;
++ goto restart;
++ }
++ }
++
++ if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
++ /* Push init section out first before first actual fragment */
++ int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
++ memcpy(buf, v->init_sec_buf, copy_size);
++ v->init_sec_buf_read_offset += copy_size;
++ ret = copy_size;
++ goto end;
++ }
++
++ /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/
++ if (!v->cur_seg) {
++ v->cur_seg = get_current_fragment(v);
++ }
++ if (!v->cur_seg) {
++ ret = AVERROR_EOF;
++ goto end;
++ }
++ ret = read_from_url(v, v->cur_seg, buf, buf_size, READ_NORMAL);
++ if (ret > 0)
++ goto end;
++ ff_format_io_close(v->parent, &v->input);
++ v->cur_seq_no++;
++ goto restart;
++
++end:
++ return ret;
++}
++
++static int save_avio_options(AVFormatContext *s)
++{
++ DASHContext *c = s->priv_data;
++ const char *opts[] = { "headers", "user_agent", "user-agent", "cookies", NULL }, **opt = opts;
++ uint8_t *buf = NULL;
++ int ret = 0;
++
++ while (*opt) {
++ if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
++ if (buf[0] != '\0') {
++ ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
++ if (ret < 0)
++ return ret;
++ }
++ }
++ opt++;
++ }
++
++ return ret;
++}
++
++static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
++ int flags, AVDictionary **opts)
++{
++ av_log(s, AV_LOG_ERROR,
++ "A HDS playlist item '%s' referred to an external file '%s'. "
++ "Opening this file was forbidden for security reasons\n",
++ s->filename, url);
++ return AVERROR(EPERM);
++}
++
++static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
++{
++ DASHContext *c = s->priv_data;
++ AVInputFormat *in_fmt = NULL;
++ AVDictionary *in_fmt_opts = NULL;
++ uint8_t *avio_ctx_buffer = NULL;
++ int ret = 0;
++
++ if (pls->ctx) {
++ /* note: the internal buffer could have changed, and be != avio_ctx_buffer */
++ av_freep(&pls->pb.buffer);
++ memset(&pls->pb, 0x00, sizeof(AVIOContext));
++ pls->ctx->pb = NULL;
++ avformat_close_input(&pls->ctx);
++ pls->ctx = NULL;
++ }
++ if (!(pls->ctx = avformat_alloc_context())) {
++ ret = AVERROR(ENOMEM);
++ goto fail;
++ }
++
++ avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
++ if (!avio_ctx_buffer ) {
++ ret = AVERROR(ENOMEM);
++ avformat_free_context(pls->ctx);
++ pls->ctx = NULL;
++ goto fail;
++ }
++ if (c->is_live) {
++ ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL);
++ } else {
++ ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data);
++ }
++ pls->pb.seekable = 0;
++
++ if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
++ goto fail;
++
++ pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
++ pls->ctx->probesize = 1024 * 4;
++ pls->ctx->max_analyze_duration = 4 * AV_TIME_BASE;
++ ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
++ if (ret < 0) {
++ av_log(s, AV_LOG_ERROR, "Error when loading first fragment, playlist %d\n", (int)pls->rep_idx);
++ avformat_free_context(pls->ctx);
++ pls->ctx = NULL;
++ goto fail;
++ }
++
++ pls->ctx->pb = &pls->pb;
++ pls->ctx->io_open = nested_io_open;
++
++ // provide additional information from mpd if available
++ ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
++ av_dict_free(&in_fmt_opts);
++ if (ret < 0)
++ goto fail;
++ if (pls->n_fragments) {
++ ret = avformat_find_stream_info(pls->ctx, NULL);
++ if (ret < 0)
++ goto fail;
++ }
++
++fail:
++ return ret;
++}
++
++static int open_demux_for_component(AVFormatContext *s, struct representation *pls)
++{
++ int ret = 0;
++ int i;
++
++ pls->parent = s;
++ pls->cur_seq_no = calc_cur_seg_no(s, pls);
++ pls->last_seq_no = calc_max_seg_no(s, pls);
++
++ ret = reopen_demux_for_component(s, pls);
++ if (ret < 0) {
++ goto fail;
++ }
++ for (i = 0; i < pls->ctx->nb_streams; i++) {
++ AVStream *st = avformat_new_stream(s, NULL);
++ AVStream *ist = pls->ctx->streams[i];
++ if (!st) {
++ ret = AVERROR(ENOMEM);
++ goto fail;
++ }
++ st->id = i;
++ avcodec_parameters_copy(st->codecpar, pls->ctx->streams[i]->codecpar);
++ avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
++ }
++
++ return 0;
++fail:
++ return ret;
++}
++
++static int dash_read_header(AVFormatContext *s)
++{
++ void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
++ DASHContext *c = s->priv_data;
++ int ret = 0;
++ int stream_index = 0;
++
++ c->interrupt_callback = &s->interrupt_callback;
++ // if the URL context is good, read important options we must broker later
++ if (u) {
++ update_options(&c->user_agent, "user-agent", u);
++ update_options(&c->cookies, "cookies", u);
++ update_options(&c->headers, "headers", u);
++ }
++
++ if ((ret = parse_manifest(s, s->filename, s->pb)) < 0)
++ goto fail;
++
++ if ((ret = save_avio_options(s)) < 0)
++ goto fail;
++
++ /* If this isn't a live stream, fill the total duration of the
++ * stream. */
++ if (!c->is_live) {
++ s->duration = (int64_t) c->media_presentation_duration_sec * AV_TIME_BASE;
++ }
++
++ /* Open the demuxer for curent video and current audio components if available */
++ if (!ret && c->cur_video) {
++ ret = open_demux_for_component(s, c->cur_video);
++ if (!ret) {
++ c->cur_video->stream_index = stream_index;
++ ++stream_index;
++ } else {
++ free_representation(c->cur_video);
++ c->cur_video = NULL;
++ }
++ }
++
++ if (!ret && c->cur_audio) {
++ ret = open_demux_for_component(s, c->cur_audio);
++ if (!ret) {
++ c->cur_audio->stream_index = stream_index;
++ ++stream_index;
++ } else {
++ free_representation(c->cur_audio);
++ c->cur_audio = NULL;
++ }
++ }
++
++ if (!stream_index) {
++ ret = AVERROR_INVALIDDATA;
++ goto fail;
++ }
++
++ /* Create a program */
++ if (!ret) {
++ AVProgram *program;
++ program = av_new_program(s, 0);
++ if (!program) {
++ goto fail;
++ }
++
++ if (c->cur_video) {
++ av_program_add_stream_index(s, 0, c->cur_video->stream_index);
++ }
++
++ if (c->cur_audio) {
++ av_program_add_stream_index(s, 0, c->cur_audio->stream_index);
++ }
++ }
++
++ return 0;
++fail:
++ return ret;
++}
++
++static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
++{
++ DASHContext *c = s->priv_data;
++ int ret = 0;
++ struct representation *cur = NULL;
++
++ if (!c->cur_audio && !c->cur_video) {
++ return AVERROR_INVALIDDATA;
++ }
++ if (c->cur_audio && !c->cur_video) {
++ cur = c->cur_audio;
++ } else if (!c->cur_audio && c->cur_video) {
++ cur = c->cur_video;
++ } else if (c->cur_video->cur_timestamp < c->cur_audio->cur_timestamp) {
++ cur = c->cur_video;
++ } else {
++ cur = c->cur_audio;
++ }
++
++ if (cur->ctx) {
++ ret = av_read_frame(cur->ctx, &cur->pkt);
++ if (ret < 0) {
++ av_packet_unref(&cur->pkt);
++ } else {
++ /* If we got a packet, return it */
++ *pkt = cur->pkt;
++ cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
++ pkt->stream_index = cur->stream_index;
++ reset_packet(&cur->pkt);
++ return 0;
++ }
++ }
++ return AVERROR_EOF;
++}
++
++static int dash_close(AVFormatContext *s)
++{
++ DASHContext *c = s->priv_data;
++
++ if (c->cur_audio) {
++ free_representation(c->cur_audio);
++ }
++
++ if (c->cur_video) {
++ free_representation(c->cur_video);
++ }
++
++ av_freep(&c->cookies);
++ av_freep(&c->user_agent);
++ av_dict_free(&c->avio_opts);
++ av_freep(&c->base_url);
++ return 0;
++}
++
++static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags)
++{
++ int ret = 0;
++ int i = 0;
++ int j = 0;
++ int64_t duration = 0;
++
++ av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], playlist %d\n", seek_pos_msec, pls->rep_idx);
++
++ // single fragment mode
++ if (pls->n_fragments == 1) {
++ pls->cur_timestamp = 0;
++ pls->cur_seg_offset = 0;
++ ff_read_frame_flush(pls->ctx);
++ return av_seek_frame(pls->ctx, -1, seek_pos_msec*1000, flags);
++ }
++
++ if (pls->input)
++ ff_format_io_close(pls->parent, &pls->input);
++
++ // find the nearest fragment
++ if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
++ int64_t num = pls->first_seq_no;
++ av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] last_seq_no[%"PRId64"], playlist %d.\n",
++ (int)pls->n_timelines, (int64_t)pls->last_seq_no, (int)pls->rep_idx);
++ for (i = 0; i < pls->n_timelines; i++) {
++ if (pls->timelines[i]->t > 0) {
++ duration = pls->timelines[i]->t;
++ }
++ duration += pls->timelines[i]->d;
++ if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
++ goto set_seq_num;
++ }
++ for (j = 0; j < pls->timelines[i]->r; j++) {
++ duration += pls->timelines[i]->d;
++ num++;
++ if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
++ goto set_seq_num;
++ }
++ }
++ num++;
++ }
++
++set_seq_num:
++ pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
++ av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n",
++ (int64_t)pls->cur_seq_no, (int)pls->rep_idx);
++ } else if (pls->fragment_duration > 0) {
++ pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000;
++ } else {
++ av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing fragment_duration\n");
++ pls->cur_seq_no = pls->first_seq_no;
++ }
++ pls->cur_timestamp = 0;
++ pls->cur_seg_offset = 0;
++ pls->init_sec_buf_read_offset = 0;
++ ret = reopen_demux_for_component(s, pls);
++
++ return ret;
++}
++
++static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
++{
++ int ret = 0;
++ DASHContext *c = s->priv_data;
++ int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
++ s->streams[stream_index]->time_base.den,
++ flags & AVSEEK_FLAG_BACKWARD ?
++ AV_ROUND_DOWN : AV_ROUND_UP);
++ if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
++ return AVERROR(ENOSYS);
++ if (c->cur_audio) {
++ ret = dash_seek(s, c->cur_audio, seek_pos_msec, flags);
++ }
++ if (!ret && c->cur_video) {
++ ret = dash_seek(s, c->cur_video, seek_pos_msec, flags);
++ }
++ return ret;
++}
++
++static int dash_probe(AVProbeData *p)
++{
++ if (!av_stristr(p->buf, "<MPD"))
++ return 0;
++
++ if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
++ av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
++ av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
++ av_stristr(p->buf, "dash:profile:isoff-main:2011")) {
++ return AVPROBE_SCORE_MAX;
++ }
++ if (av_stristr(p->buf, "dash:profile")) {
++ return AVPROBE_SCORE_MAX >> 1;
++ }
++
++ return 0;
++}
++
++#define OFFSET(x) offsetof(DASHContext, x)
++#define FLAGS AV_OPT_FLAG_DECODING_PARAM
++static const AVOption dash_options[] = {
++ {NULL}
++};
++
++static const AVClass dash_class = {
++ .class_name = "dash",
++ .item_name = av_default_item_name,
++ .option = dash_options,
++ .version = LIBAVUTIL_VERSION_INT,
++};
++
++AVInputFormat ff_dash_demuxer = {
++ .name = "dash",
++ .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
++ .priv_class = &dash_class,
++ .priv_data_size = sizeof(DASHContext),
++ .read_probe = dash_probe,
++ .read_header = dash_read_header,
++ .read_packet = dash_read_packet,
++ .read_close = dash_close,
++ .read_seek = dash_read_seek,
++ .flags = AVFMT_NO_BYTE_SEEK,
++};
projects / bs-cst-neutrino-hd.git / commitdiff