[FFmpeg-devel] [PATCH v23 1/2] avformat/dashdec: add dash demuxer base version

Steven Liu lingjiujianke at gmail.com
Thu Sep 7 19:42:56 EEST 2017


2017-09-05 17:36 GMT+08:00 Steven Liu <lingjiujianke at gmail.com>:
> 2017-09-01 18:26 GMT+08:00 Steven Liu <lq at chinaffmpeg.org>:
>> ffmpeg need a dash demuxer for demux the dash formats base on
>> https://github.com/samsamsam-iptvplayer/exteplayer3/blob/master/tmp/ffmpeg/patches/3.2.2/000001_add_dash_demux.patch
>>
>> TODO:
>> 1. support multi bitrate dash.
>>
>> v2 fixed:
>> 1. from autodetect to disabled
>> 2. from camelCase code style to ffmpeg code style
>> 3. from RepType to AVMediaType
>> 4. fix variable typo
>> 5. change time value from uint32_t to uint64_t
>> 6. removed be used once API
>> 7. change 'time(NULL)`, except it is not 2038-safe.' to av_gettime and av_timegm
>> 8. merge complex free operation to free_fragment
>> 9. use API from snprintf to av_asprintf
>>
>> v3 fixed:
>> 1. fix typo from --enabled-xml2 to --enable-xml2
>>
>> v4 fixed:
>> 1. from --enable-xml2 to --enable-libxml2
>> 2. move system includes to top
>> 3. remove nouse includes
>> 4. rename enum name
>> 5. add a trailing comma for the last entry enum
>> 6. fix comment typo
>> 7. add const to DASHContext class front
>> 8. check sscanf if return arguments and give warning message when error
>> 9. check validity before free seg->url and seg
>> 10. check if the val is null, before use atoll
>>
>> v5 fixed:
>> 1. fix typo from mainifest to manifest
>>
>> v6 fixed:
>> 1. from realloc to av_realloc
>> 2. from free to av_free
>>
>> v7 fixed:
>> 1. remove the -lxml2 from configure when require_pkg_config
>>
>> v8 fixed:
>> 1. fix replace filename template by av_asprintf secure problem
>>
>> v9 modified:
>> 1. make manifest parser clearly
>>
>> v10 fixed:
>> 1. fix function API name code style
>> 2. remove redundant strreplace call
>> 3. remove redundant memory operation and check return value from get_content_url()
>> 4. add space between ) and {
>> 5. remove no need to log the value for print
>>
>> v11 fixed:
>> 1. from atoll to strtoll
>> Suggested-by: Michael Niedermayer <michael at niedermayer.cc>
>>
>> v12 fixed:
>> 1. remove strreplace and instead by av_strreplace
>> Suggested-by: Nicolas George <george at nsup.org>
>>
>> v13 fixed:
>> 1. fix bug: cannot play:
>> http://dash.edgesuite.net/akamai/bbb_30fps/bbb_30fps.mpd
>> Reported-by: Andy Furniss <adf.lists at gmail.com>
>>
>> v14 fixed:
>> 1. fix bug: TLS connection was non-properly terminated
>> 2. fix bug: No trailing CRLF found in HTTP header
>> Reported-by: Andy Furniss <adf.lists at gmail.com>
>>
>> v15 fixed:
>> 1. play youtube link: ffmpeg -i $(youtube-dl -J "https://www.youtube.com/watch?v=XmL19DOP_Ls" | jq -r ".requested_formats[0].manifest_url")
>> 2. code refine for timeline living stream
>> Reported-by: Ricardo Constantino <wiiaboo at gmail.com>
>>
>> v16 fixed:
>> 1. remove the snprintf and instead by get_segment_filename make safety
>> 2. remove unnecessary loops
>> 3. updated xmlStrcmp and xmlFree to av_* functions
>> 4. merge code repeat into one function
>> 5. add memory alloc faild check
>> 6. update update_init_section and open_url
>> 7. output safety error message when filename template not safe
>> Suggested-by : wm4 <nfxjfg at googlemail.com>
>>
>> v17 fixed:
>> 1. add memory alloc faild check
>> 2. fix resource space error at free_representation
>>
>> v18 fixed:
>> 1. add condition of template format
>>
>> v19 fixed:
>> 1. fix typo of the option describe
>>
>> v20 fixed:
>> 1. add the c->base_url alloc check
>> 2. make the DASHTmplId same to dashenc
>>
>> v21 fixed:
>> 1. remove get_repl_pattern_and_format and get_segment_filename
>> 2. process use dashcomm APIs
>>
>> v22 fixed:
>> 1. modify the include "dashcomm.h" to include "dash.h"
>> 2. use internal API from dash_fill_tmpl_params to ff_dash_fill_tmpl_params
>>
>> Signed-off-by: Steven Liu <lq at chinaffmpeg.org>
>> Signed-off-by: samsamsam <samsamsam at o2.pl>
>> ---
>>  configure                |    4 +
>>  libavformat/Makefile     |    1 +
>>  libavformat/allformats.c |    2 +-
>>  libavformat/dashdec.c    | 1848 ++++++++++++++++++++++++++++++++++++++++++++++
>>  4 files changed, 1854 insertions(+), 1 deletion(-)
>>  create mode 100644 libavformat/dashdec.c
>>
>> diff --git a/configure b/configure
>> index 4f1c172333..3f0d05a6f9 100755
>> --- a/configure
>> +++ b/configure
>> @@ -272,6 +272,7 @@ 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]
>> @@ -1578,6 +1579,7 @@ EXTERNAL_LIBRARY_LIST="
>>      libvpx
>>      libwavpack
>>      libwebp
>> +    libxml2
>>      libzimg
>>      libzmq
>>      libzvbi
>> @@ -2939,6 +2941,7 @@ 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"
>> @@ -6006,6 +6009,7 @@ enabled openssl           && { use_pkg_config openssl openssl/ssl.h OPENSSL_init
>>                                 check_lib openssl 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
>>
>>  if enabled gcrypt; then
>>      GCRYPT_CONFIG="${cross_prefix}libgcrypt-config"
>> diff --git a/libavformat/Makefile b/libavformat/Makefile
>> index de954af130..ac03e0d471 100644
>> --- a/libavformat/Makefile
>> +++ b/libavformat/Makefile
>> @@ -133,6 +133,7 @@ OBJS-$(CONFIG_CRC_MUXER)                 += crcenc.o
>>  OBJS-$(CONFIG_DATA_DEMUXER)              += rawdec.o
>>  OBJS-$(CONFIG_DATA_MUXER)                += rawenc.o
>>  OBJS-$(CONFIG_DASH_MUXER)                += dash.o 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 cb09a60e6f..416e5e1127 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..9a3a199d4e
>> --- /dev/null
>> +++ b/libavformat/dashdec.c
>> @@ -0,0 +1,1848 @@
>> +/*
>> + * Dynamic Adaptive Streaming over HTTP demux
>> + * Copyright (c) 2017 samsamsam at 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"
>> +#include "dash.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 {
>> +    /* starttime: 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 at starttime + @duration * (@repeat + 1)).
>> +     * */
>> +    int64_t starttime;
>> +    /* repeat: Element or Attribute Name
>> +     * specifies the repeat count of the number of following contiguous Segments with
>> +     * the same duration expressed by the value of @duration. This value is zero-based
>> +     * (e.g. a value of three means four Segments in the contiguous series).
>> +     * */
>> +    int64_t repeat;
>> +    /* duration: Element or Attribute Name
>> +     * specifies the Segment duration, in units of the value of the @timescale.
>> +     * */
>> +    int64_t duration;
>> +};
>> +
>> +/*
>> + * 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;
>> +    AVIOContext pb;
>> +    AVIOContext *input;
>> +    AVFormatContext *parent;
>> +    AVFormatContext *ctx;
>> +    AVPacket pkt;
>> +    int rep_idx;
>> +    int rep_count;
>> +    int stream_index;
>> +
>> +    enum AVMediaType type;
>> +
>> +    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 start_number; /* used in case when we have dynamic list of segment to know which segments are new one*/
>> +
>> +    int64_t fragment_duration;
>> +    int64_t fragment_timescale;
>> +
>> +    int64_t presentation_timeoffset;
>> +
>> +    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;
>> +    int64_t cur_timestamp;
>> +    int is_restart_needed;
>> +};
>> +
>> +typedef struct DASHContext {
>> +    const AVClass *class;
>> +    char *base_url;
>> +    struct representation *cur_video;
>> +    struct representation *cur_audio;
>> +
>> +    /* MediaPresentationDescription Attribute */
>> +    uint64_t media_presentation_duration;
>> +    uint64_t suggested_presentation_delay;
>> +    uint64_t availability_start_time;
>> +    uint64_t publish_time;
>> +    uint64_t minimum_update_period;
>> +    uint64_t time_shift_buffer_depth;
>> +    uint64_t min_buffer_time;
>> +
>> +    /* Period Attribute */
>> +    uint64_t period_duration;
>> +    uint64_t period_start;
>> +
>> +    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
>> +    char *allowed_extensions;
>> +    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;
>> +    int size = 0;
>> +    float value = 0;
>> +    char 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 int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
>> +{
>> +    int64_t start_time = 0;
>> +    int64_t i = 0;
>> +    int64_t j = 0;
>> +    int64_t num = 0;
>> +
>> +    if (pls->n_timelines) {
>> +        for (i = 0; i < pls->n_timelines; i++) {
>> +            if (pls->timelines[i]->starttime > 0) {
>> +                start_time = pls->timelines[i]->starttime;
>> +            }
>> +            if (num == cur_seq_no)
>> +                goto finish;
>> +
>> +            start_time += pls->timelines[i]->duration;
>> +            for (j = 0; j < pls->timelines[i]->repeat; j++) {
>> +                num++;
>> +                if (num == cur_seq_no)
>> +                    goto finish;
>> +                start_time += pls->timelines[i]->duration;
>> +            }
>> +            num++;
>> +        }
>> +    }
>> +finish:
>> +    return start_time;
>> +}
>> +
>> +static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
>> +{
>> +    int64_t i = 0;
>> +    int64_t j = 0;
>> +    int64_t num = 0;
>> +    int64_t start_time = 0;
>> +
>> +    for (i = 0; i < pls->n_timelines; i++) {
>> +        if (pls->timelines[i]->starttime > 0) {
>> +            start_time = pls->timelines[i]->starttime;
>> +        }
>> +        if (start_time > cur_time)
>> +            goto finish;
>> +
>> +        start_time += pls->timelines[i]->duration;
>> +        for (j = 0; j < pls->timelines[i]->repeat; j++) {
>> +            num++;
>> +            if (start_time > cur_time)
>> +                goto finish;
>> +            start_time += pls->timelines[i]->duration;
>> +        }
>> +        num++;
>> +    }
>> +
>> +    return -1;
>> +
>> +finish:
>> +    return num;
>> +}
>> +
>> +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;
>> +}
>> +
>> +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_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_freep(&pls->url_template);
>> +    av_freep(pls);
>> +}
>> +
>> +static void set_httpheader_options(DASHContext *c, AVDictionary *opts)
>> +{
>> +    // 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);
>> +    }
>> +}
>> +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;
>> +
>> +    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, "file", NULL)) {
>> +        if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
>> +            av_log(s, AV_LOG_ERROR,
>> +                "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
>> +                "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
>> +                url);
>> +            return AVERROR_INVALIDDATA;
>> +        }
>> +    } else if (av_strstart(proto_name, "http", NULL)) {
>> +        ;
>> +    } else
>> +        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.
>> +        char *new_cookies = NULL;
>> +
>> +        if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
>> +            av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
>> +
>> +        if (new_cookies) {
>> +            av_free(c->cookies);
>> +            c->cookies = new_cookies;
>> +        }
>> +
>> +        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 *get_content_url(xmlNodePtr *baseurl_nodes,
>> +                             int n_baseurl_nodes,
>> +                             char *rep_id_val,
>> +                             char *rep_bandwidth_val,
>> +                             char *val)
>> +{
>> +    int i;
>> +    char *text;
>> +    char *url = NULL;
>> +    char tmp_str[MAX_URL_SIZE];
>> +    char tmp_str_2[MAX_URL_SIZE];
>> +
>> +    memset(tmp_str, 0, sizeof(tmp_str));
>> +
>> +    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) {
>> +                memset(tmp_str, 0, sizeof(tmp_str));
>> +                memset(tmp_str_2, 0, sizeof(tmp_str_2));
>> +                ff_make_absolute_url(tmp_str_2, MAX_URL_SIZE, tmp_str, text);
>> +                av_strlcpy(tmp_str, tmp_str_2, sizeof(tmp_str));
>> +                av_free(text);
>> +            }
>> +        }
>> +    }
>> +
>> +    if (val)
>> +        av_strlcat(tmp_str, (const char*)val, sizeof(tmp_str));
>> +
>> +    if (rep_id_val) {
>> +        url = av_strireplace(tmp_str, "$RepresentationID$", (const char*)rep_id_val);
>> +        if (!url) {
>> +            return NULL;
>> +        }
>> +        av_strlcpy(tmp_str, url, sizeof(tmp_str));
>> +        av_free(url);
>> +    }
>> +    if (rep_bandwidth_val && tmp_str[0] != '\0') {
>> +        url = av_strireplace(tmp_str, "$Bandwidth$", (const char*)rep_bandwidth_val);
>> +        if (!url) {
>> +            return NULL;
>> +        }
>> +    }
>> +    return url;
>> +}
>> +
>> +static char *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const char *attrname)
>> +{
>> +    int i;
>> +    char *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 char *nodename)
>> +{
>> +    xmlNodePtr node = rootnode;
>> +    if (!node) {
>> +        return NULL;
>> +    }
>> +
>> +    node = xmlFirstElementChild(node);
>> +    while (node) {
>> +        if (!av_strcasecmp(node->name, nodename)) {
>> +            return node;
>> +        }
>> +        node = xmlNextElementSibling(node);
>> +    }
>> +    return NULL;
>> +}
>> +
>> +static enum AVMediaType get_content_type(xmlNodePtr node)
>> +{
>> +    enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
>> +    int i = 0;
>> +    const char *attr;
>> +    char *val = NULL;
>> +
>> +    if (node) {
>> +        for (i = 0; i < 2; i++) {
>> +            attr = i ? "mimeType" : "contentType";
>> +            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;
>> +                }
>> +                av_free(val);
>> +            }
>> +        }
>> +    }
>> +    return type;
>> +}
>> +
>> +static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep,
>> +                                         xmlNodePtr fragmenturl_node,
>> +                                         xmlNodePtr *baseurl_nodes,
>> +                                         char *rep_id_val,
>> +                                         char *rep_bandwidth_val)
>> +{
>> +    char *initialization_val = NULL;
>> +    char *media_val = NULL;
>> +
>> +    if (!av_strcasecmp(fragmenturl_node->name, (const char *)"Initialization")) {
>> +        initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
>> +        if (initialization_val) {
>> +            rep->init_section = av_mallocz(sizeof(struct fragment));
>> +            if (!rep->init_section) {
>> +                av_free(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);
>> +                av_free(initialization_val);
>> +                return AVERROR(ENOMEM);
>> +            }
>> +            rep->init_section->size = -1;
>> +            av_free(initialization_val);
>> +        }
>> +    } else if (!av_strcasecmp(fragmenturl_node->name, (const char *)"SegmentURL")) {
>> +        media_val = xmlGetProp(fragmenturl_node, "media");
>> +        if (media_val) {
>> +            struct fragment *seg = av_mallocz(sizeof(struct fragment));
>> +            if (!seg) {
>> +                av_free(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);
>> +                av_free(media_val);
>> +                return AVERROR(ENOMEM);
>> +            }
>> +            seg->size = -1;
>> +            dynarray_add(&rep->fragments, &rep->n_fragments, seg);
>> +            av_free(media_val);
>> +        }
>> +    }
>> +
>> +    return 0;
>> +}
>> +
>> +static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep,
>> +                                          xmlNodePtr fragment_timeline_node)
>> +{
>> +    xmlAttrPtr attr = NULL;
>> +    char *val  = NULL;
>> +
>> +    if (!av_strcasecmp(fragment_timeline_node->name, (const char *)"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 (!av_strcasecmp(attr->name, (const char *)"t")) {
>> +                tml->starttime = (int64_t)strtoll(val, NULL, 10);
>> +            } else if (!av_strcasecmp(attr->name, (const char *)"r")) {
>> +                tml->repeat =(int64_t) strtoll(val, NULL, 10);
>> +            } else if (!av_strcasecmp(attr->name, (const char *)"d")) {
>> +                tml->duration = (int64_t)strtoll(val, NULL, 10);
>> +            }
>> +            attr = attr->next;
>> +            av_free(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;
>> +    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];
>> +    char *duration_val = NULL;
>> +    char *presentation_timeoffset_val = NULL;
>> +    char *startnumber_val = NULL;
>> +    char *timescale_val = NULL;
>> +    char *initialization_val = NULL;
>> +    char *media_val = NULL;
>> +    xmlNodePtr baseurl_nodes[4];
>> +    xmlNodePtr representation_node = node;
>> +    char *rep_id_val = xmlGetProp(representation_node, "id");
>> +    char *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");
>> +
>> +        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;
>> +
>> +            presentation_timeoffset_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "presentationTimeOffset");
>> +            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;
>> +                av_free(initialization_val);
>> +            }
>> +
>> +            if (media_val) {
>> +                rep->url_template = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, media_val);
>> +                av_free(media_val);
>> +            }
>> +
>> +            if (presentation_timeoffset_val) {
>> +                rep->presentation_timeoffset = (int64_t) strtoll(presentation_timeoffset_val, NULL, 10);
>> +                av_free(presentation_timeoffset_val);
>> +            }
>> +            if (duration_val) {
>> +                rep->fragment_duration = (int64_t) strtoll(duration_val, NULL, 10);
>> +                av_free(duration_val);
>> +            }
>> +            if (timescale_val) {
>> +                rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
>> +                av_free(timescale_val);
>> +            }
>> +            if (startnumber_val) {
>> +                rep->first_seq_no = (int64_t) strtoll(startnumber_val, NULL, 10);
>> +                av_free(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_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);
>> +                av_free(duration_val);
>> +            }
>> +            if (timescale_val) {
>> +                rep->fragment_timescale = (int64_t) strtoll(timescale_val, NULL, 10);
>> +                av_free(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);
>> +            }
>> +
>> +            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 {
>> +            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)
>> +        av_free(rep_id_val);
>> +    if (rep_bandwidth_val)
>> +        av_free(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 (!av_strcasecmp(node->name, (const char *)"SegmentTemplate")) {
>> +            fragment_template_node = node;
>> +        } else if (!av_strcasecmp(node->name, (const char *)"ContentComponent")) {
>> +            content_component_node = node;
>> +        } else if (!av_strcasecmp(node->name, (const char *)"BaseURL")) {
>> +            adaptionset_baseurl_node = node;
>> +        } else if (!av_strcasecmp(node->name, (const char *)"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;
>> +    char *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;
>> +
>> +        set_httpheader_options(c, opts);
>> +        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) {
>> +        av_free(c->base_url);
>> +        return AVERROR(ENOMEM);
>> +    }
>> +
>> +    filesize = avio_read(in, buffer, filesize);
>> +    if (filesize <= 0) {
>> +        av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", url);
>> +        ret = AVERROR_INVALIDDATA;
>> +    } else {
>> +        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 ||
>> +            av_strcasecmp(node->name, (const char *)"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 (!av_strcasecmp(val, (const char *)"dynamic"))
>> +            c->is_live = 1;
>> +        av_free(val);
>> +
>> +        attr = node->properties;
>> +        while (attr) {
>> +            val = xmlGetProp(node, attr->name);
>> +
>> +            if (!av_strcasecmp(attr->name, (const char *)"availabilityStartTime")) {
>> +                c->availability_start_time = get_utc_date_time_insec(s, (const char *)val);
>> +            } else if (!av_strcasecmp(attr->name, (const char *)"publishTime")) {
>> +                c->publish_time = get_utc_date_time_insec(s, (const char *)val);
>> +            } else if (!av_strcasecmp(attr->name, (const char *)"minimumUpdatePeriod")) {
>> +                c->minimum_update_period = get_duration_insec(s, (const char *)val);
>> +            } else if (!av_strcasecmp(attr->name, (const char *)"timeShiftBufferDepth")) {
>> +                c->time_shift_buffer_depth = get_duration_insec(s, (const char *)val);
>> +            } else if (!av_strcasecmp(attr->name, (const char *)"minBufferTime")) {
>> +                c->min_buffer_time = get_duration_insec(s, (const char *)val);
>> +            } else if (!av_strcasecmp(attr->name, (const char *)"suggestedPresentationDelay")) {
>> +                c->suggested_presentation_delay = get_duration_insec(s, (const char *)val);
>> +            } else if (!av_strcasecmp(attr->name, (const char *)"mediaPresentationDuration")) {
>> +                c->media_presentation_duration = get_duration_insec(s, (const char *)val);
>> +            }
>> +            attr = attr->next;
>> +            av_free(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 (!av_strcasecmp(node->name, (const char *)"Period")) {
>> +                perdiod_duration_sec = 0;
>> +                perdiod_start_sec = 0;
>> +                attr = node->properties;
>> +                while (attr) {
>> +                    val = xmlGetProp(node, attr->name);
>> +                    if (!av_strcasecmp(attr->name, (const char *)"duration")) {
>> +                        perdiod_duration_sec = get_duration_insec(s, (const char *)val);
>> +                    } else if (!av_strcasecmp(attr->name, (const char *)"start")) {
>> +                        perdiod_start_sec = get_duration_insec(s, (const char *)val);
>> +                    }
>> +                    attr = attr->next;
>> +                    av_free(val);
>> +                }
>> +                if ((perdiod_duration_sec) >= (c->period_duration)) {
>> +                    period_node = node;
>> +                    c->period_duration = perdiod_duration_sec;
>> +                    c->period_start = perdiod_start_sec;
>> +                    if (c->period_start > 0)
>> +                        c->media_presentation_duration = c->period_duration;
>> +                }
>> +            }
>> +            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 (!av_strcasecmp(adaptionset_node->name, (const char *)"BaseURL")) {
>> +                period_baseurl_node = adaptionset_node;
>> +            } else if (!av_strcasecmp(adaptionset_node->name, (const char *)"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;
>> +            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();
>> +    }
>> +
>> +    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 = s->priv_data;
>> +    int64_t num = 0;
>> +    int64_t start_time_offset = 0;
>> +
>> +    if (c->is_live) {
>> +        if (pls->n_fragments) {
>> +            num = pls->first_seq_no;
>> +        } else if (pls->n_timelines) {
>> +            start_time_offset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - pls->timelines[pls->first_seq_no]->starttime; // total duration of playlist
>> +            if (start_time_offset < 60 * pls->fragment_timescale)
>> +                start_time_offset = 0;
>> +            else
>> +                start_time_offset = start_time_offset - 60 * pls->fragment_timescale;
>> +
>> +            num = calc_next_seg_no_from_timelines(pls, pls->timelines[pls->first_seq_no]->starttime + start_time_offset);
>> +            if (num == -1)
>> +                num = pls->first_seq_no;
>> +        } else if (pls->fragment_duration){
>> +            if (pls->presentation_timeoffset) {
>> +                num = pls->presentation_timeoffset * pls->fragment_timescale / pls->fragment_duration;
>> +            } else if (c->publish_time > 0 && !c->availability_start_time) {
>> +                num = pls->first_seq_no + (((c->publish_time - c->availability_start_time) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
>> +            } else {
>> +                num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->suggested_presentation_delay) * 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 = s->priv_data;
>> +    int64_t num = 0;
>> +
>> +    if (c->is_live && pls->fragment_duration) {
>> +        num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->time_shift_buffer_depth) * pls->fragment_timescale) / pls->fragment_duration;
>> +    } else {
>> +        num = pls->first_seq_no;
>> +    }
>> +    return num;
>> +}
>> +
>> +static int64_t calc_max_seg_no(struct representation *pls)
>> +{
>> +    DASHContext *c = pls->parent->priv_data;
>> +    int64_t num = 0;
>> +
>> +    if (pls->n_fragments) {
>> +        num = pls->first_seq_no + pls->n_fragments - 1;
>> +    } else if (pls->n_timelines) {
>> +        int i = 0;
>> +        num = pls->first_seq_no + pls->n_timelines - 1;
>> +        for (i = 0; i < pls->n_timelines; i++) {
>> +            num += pls->timelines[i]->repeat;
>> +        }
>> +    } else if (c->is_live && pls->fragment_duration) {
>> +        num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time)) * pls->fragment_timescale)  / pls->fragment_duration;
>> +    } else if (pls->fragment_duration) {
>> +        num = pls->first_seq_no + (c->media_presentation_duration * pls->fragment_timescale) / pls->fragment_duration;
>> +    }
>> +
>> +    return num;
>> +}
>> +
>> +static void move_timelines(struct representation *rep_src, struct representation *rep_dest)
>> +{
>> +    if (rep_dest && rep_src ) {
>> +        free_timelines_list(rep_dest);
>> +        rep_dest->timelines    = rep_src->timelines;
>> +        rep_dest->n_timelines  = rep_src->n_timelines;
>> +        rep_dest->first_seq_no = rep_src->first_seq_no;
>> +        rep_dest->last_seq_no = calc_max_seg_no(rep_dest);
>> +        rep_src->timelines = NULL;
>> +        rep_src->n_timelines = 0;
>> +        rep_dest->cur_seq_no = rep_src->cur_seq_no;
>> +    }
>> +}
>> +
>> +static void move_segments(struct representation *rep_src, struct representation *rep_dest)
>> +{
>> +    if (rep_dest && rep_src ) {
>> +        free_fragment_list(rep_dest);
>> +        if (rep_src->start_number > (rep_dest->start_number + rep_dest->n_fragments))
>> +            rep_dest->cur_seq_no = 0;
>> +        else
>> +            rep_dest->cur_seq_no += rep_src->start_number - rep_dest->start_number;
>> +        rep_dest->fragments    = rep_src->fragments;
>> +        rep_dest->n_fragments  = rep_src->n_fragments;
>> +        rep_dest->parent  = rep_src->parent;
>> +        rep_dest->last_seq_no = calc_max_seg_no(rep_dest);
>> +        rep_src->fragments = NULL;
>> +        rep_src->n_fragments = 0;
>> +    }
>> +}
>> +
>> +
>> +static int refresh_manifest(AVFormatContext *s)
>> +{
>> +
>> +    int ret = 0;
>> +    DASHContext *c = s->priv_data;
>> +
>> +    // save current context
>> +    struct representation *cur_video =  c->cur_video;
>> +    struct representation *cur_audio =  c->cur_audio;
>> +    char *base_url = c->base_url;
>> +
>> +    c->base_url = NULL;
>> +    c->cur_video = NULL;
>> +    c->cur_audio = NULL;
>> +    ret = parse_manifest(s, s->filename, NULL);
>> +    if (ret)
>> +        goto finish;
>> +
>> +    if (cur_video && cur_video->timelines || cur_audio && cur_audio->timelines) {
>> +        // calc current time
>> +        int64_t currentVideoTime = 0;
>> +        int64_t currentAudioTime = 0;
>> +        if (cur_video && cur_video->timelines)
>> +            currentVideoTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->fragment_timescale;
>> +        if (cur_audio && cur_audio->timelines)
>> +            currentAudioTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->fragment_timescale;
>> +        // update segments
>> +        if (cur_video && cur_video->timelines) {
>> +            c->cur_video->cur_seq_no = calc_next_seg_no_from_timelines(c->cur_video, currentVideoTime * cur_video->fragment_timescale - 1);
>> +            if (c->cur_video->cur_seq_no >= 0) {
>> +                move_timelines(c->cur_video, cur_video);
>> +            }
>> +        }
>> +        if (cur_audio && cur_audio->timelines) {
>> +            c->cur_audio->cur_seq_no = calc_next_seg_no_from_timelines(c->cur_audio, currentAudioTime * cur_audio->fragment_timescale - 1);
>> +            if (c->cur_audio->cur_seq_no >= 0) {
>> +               move_timelines(c->cur_audio, cur_audio);
>> +            }
>> +        }
>> +    }
>> +    if (cur_video && cur_video->fragments) {
>> +        move_segments(c->cur_video, cur_video);
>> +    }
>> +    if (cur_audio && cur_audio->fragments) {
>> +        move_segments(c->cur_audio, cur_audio);
>> +    }
>> +
>> +finish:
>> +    // restore context
>> +    if (c->base_url)
>> +        av_free(base_url);
>> +    else
>> +        c->base_url  = base_url;
>> +    if (c->cur_audio)
>> +        free_representation(c->cur_audio);
>> +    if (c->cur_video)
>> +        free_representation(c->cur_video);
>> +    c->cur_audio = cur_audio;
>> +    c->cur_video = cur_video;
>> +    return ret;
>> +}
>> +
>> +static struct fragment *get_current_fragment(struct representation *pls)
>> +{
>> +    int64_t min_seq_no = 0;
>> +    int64_t max_seq_no = 0;
>> +    struct fragment *seg = NULL;
>> +    struct fragment *seg_ptr = NULL;
>> +    DASHContext *c = pls->parent->priv_data;
>> +
>> +    while (( !ff_check_interrupt(c->interrupt_callback)&& 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;
>> +        } else if (c->is_live) {
>> +            refresh_manifest(pls->parent);
>> +        } else {
>> +            break;
>> +        }
>> +    }
>> +    if (c->is_live) {
>> +        min_seq_no = calc_min_seg_no(pls->parent, pls);
>> +        max_seq_no = calc_max_seg_no(pls);
>> +
>> +        if (pls->timelines || pls->fragments) {
>> +            refresh_manifest(pls->parent);
>> +        }
>> +        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);
>> +        }
>> +        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) {
>> +        char tmpfilename[MAX_URL_SIZE];
>> +
>> +        ff_dash_fill_tmpl_params(tmpfilename, sizeof(tmpfilename), pls->url_template, 0, pls->cur_seq_no, 0, get_segment_start_time_based_on_timeline(pls, pls->cur_seq_no));
>> +        seg->url = av_strireplace(pls->url_template, pls->url_template, tmpfilename);
>> +        if (!seg->url) {
>> +            av_log(pls->parent, AV_LOG_WARNING, "Unable to resolve template url '%s', try to use origin template\n", pls->url_template);
>> +            seg->url = av_strdup(pls->url_template);
>> +            if (!seg->url) {
>> +                av_log(pls->parent, AV_LOG_ERROR, "Cannot resolve template url '%s'\n", pls->url_template);
>> +                return NULL;
>> +            }
>> +        }
>> +
>> +        seg->size = -1;
>> +    }
>> +
>> +    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;
>> +
>> +    set_httpheader_options(c, opts);
>> +    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;
>> +    int64_t urlsize;
>> +    int ret;
>> +
>> +    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;
>> +
>> +    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;
>> +
>> +    if (!v->is_restart_needed)
>> +        v->cur_seq_no++;
>> +    v->is_restart_needed = 1;
>> +
>> +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 DASH 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(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 * 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) {
>> +        while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
>> +            ret = av_read_frame(cur->ctx, pkt);
>> +            if (ret >= 0) {
>> +                /* If we got a packet, return it */
>> +                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;
>> +                return 0;
>> +            }
>> +            if (cur->is_restart_needed) {
>> +                cur->cur_seg_offset = 0;
>> +                cur->init_sec_buf_read_offset = 0;
>> +                if (cur->input)
>> +                    ff_format_io_close(cur->parent, &cur->input);
>> +                ret = reopen_demux_for_component(s, cur);
>> +                cur->is_restart_needed = 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]->starttime > 0) {
>> +                duration = pls->timelines[i]->starttime;
>> +            }
>> +            duration += pls->timelines[i]->duration;
>> +            if (seek_pos_msec < ((duration * 1000) /  pls->fragment_timescale)) {
>> +                goto set_seq_num;
>> +            }
>> +            for (j = 0; j < pls->timelines[i]->repeat; j++) {
>> +                duration += pls->timelines[i]->duration;
>> +                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;
>> +    }
>> +
>> +    return 0;
>> +}
>> +
>> +#define OFFSET(x) offsetof(DASHContext, x)
>> +#define FLAGS AV_OPT_FLAG_DECODING_PARAM
>> +static const AVOption dash_options[] = {
>> +    {"allowed_extensions", "List of file extensions that dash is allowed to access",
>> +        OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
>> +        {.str = "aac,m4a,m4s,m4v,mov,mp4"},
>> +        INT_MIN, INT_MAX, FLAGS},
>> +    {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,
>> +};
>> --
>> 2.11.0 (Apple Git-81)
>>
>>
>>
>> _______________________________________________
>> ffmpeg-devel mailing list
>> ffmpeg-devel at ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
>
> ping.
I'll push this if there are no objections.


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