[FFmpeg-devel] [PATCH v9] avformat/dashdec: add dash demuxer base version

Rodger Combs rodger.combs at gmail.com
Mon Mar 27 10:07:29 EEST 2017


> On Mar 27, 2017, at 01:52, Steven Liu <lingjiujianke at gmail.com> wrote:
> 
> 2017-03-27 8:39 GMT+08:00 Rodger Combs <rodger.combs at gmail.com <mailto:rodger.combs at gmail.com>>:
> 
>> 
>>> On Mar 26, 2017, at 19:10, Steven Liu <lq at chinaffmpeg.org> wrote:
>>> 
>>> 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
>>> 
>>> Reviewed-by: Clément Bœsch <u at pkh.me>
>>> Reviewed-by: Michael Niedermayer <michael at niedermayer.cc>
>>> Reviewed-by: Carl Eugen Hoyos <cehoyos at ag.or.at>
>>> Reviewed-by: Rodger Combs <rodger.combs at gmail.com>
>>> Reviewed-by: Moritz Barsnick <barsnick at gmx.net>
>>> Reviewed-by: Nicolas George <george at nsup.org>
>>> Reviewed-by: Ricardo Constantino <wiiaboo at gmail.com>
>>> Signed-off-by: Steven Liu <lq at chinaffmpeg.org>
>>> ---
>>> configure                |    4 +
>>> libavformat/Makefile     |    1 +
>>> libavformat/allformats.c |    2 +-
>>> libavformat/dashdec.c    | 1842 ++++++++++++++++++++++++++++++
>> ++++++++++++++++
>>> 4 files changed, 1848 insertions(+), 1 deletion(-)
>>> create mode 100644 libavformat/dashdec.c
>>> 
>>> diff --git a/configure b/configure
>>> index 9cc7e7d..4a6fe8a 100755
>>> --- a/configure
>>> +++ b/configure
>>> @@ -273,6 +273,7 @@ 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]
>>> @@ -1574,6 +1575,7 @@ EXTERNAL_LIBRARY_LIST="
>>>    libvpx
>>>    libwavpack
>>>    libwebp
>>> +    libxml2
>>>    libzimg
>>>    libzmq
>>>    libzvbi
>>> @@ -2906,6 +2908,7 @@ 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"
>>> @@ -5908,6 +5911,7 @@ 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 f56ef16..d77ffaa 100644
>>> --- a/libavformat/Makefile
>>> +++ b/libavformat/Makefile
>>> @@ -134,6 +134,7 @@ 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 09e62c3..d57314b 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 0000000..a4d3ba2
>>> --- /dev/null
>>> +++ b/libavformat/dashdec.c
>>> @@ -0,0 +1,1842 @@
>>> +/*
>>> + * 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"
>>> +
>>> +#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 at 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).
>>> +     * */
>>> +    int32_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 GetCurrentTimeInSec(void)
>> 
>> Code style: "gettime_sec(void)" or the like; not CamelCased.
>> 
>>> +{
>>> +    return  av_gettime() / 1000000;
>>> +}
>>> +
>>> +static uint64_t GetUTCDateTimeInSec(AVFormatContext *s, const char
>> *datetime)
>> 
>> I still don't understand why av_parse_time isn't applicable here; it
>> parses ISO-8601 dates just fine.
>> 
>>> +{
>>> +    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, "GetUTCDateTimeInSec get a wrong time
>> format\n");
>>> +       // return 0; /* parser error */
>>> +    }
>>> +    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 GetDurationInSec(AVFormatContext *s, const char
>> *duration)
>> 
>> Same question here; av_parse_time parses ISO-8601 durations if you set
>> duration=1.
>> 
> because i test use av_parse_time look like bellow:

Ah, sorry, you're right; it doesn't support it. Though I think it'd be preferable to add that functionality to the lavu function (since it's reasonably useful in general), rather than having it just implemented here.

> 1. add  string "PT2M4.0S" into libavutil/tests/parseutils.c, insert into
>    static const char * const duration_string[] = {
>        "2:34:56.79",
>        "-1:23:45.67",
>        "42.1729",
>        "-1729.42",
>        "12:34",
>        "PT2M4.0S"
>    };
> 
> 2. make libavutil/tests/parseutils
> 3. ./libavutil/tests/parseutils
> 
> output:
> localhost:dash StevenLiu$ libavutil/tests/parseutils
> objc[70892]: Class SDLTranslatorResponder is implemented in both
> /usr/local/lib/libSDL-1.2.0.dylib (0x10d363660) and
> /usr/local/lib/libSDL2-2.0.0.dylib (0x10a399db8). One of the two will be
> used. Which one is undefined.
> Testing av_parse_video_rate()
> '-inf' -> -1/0 ERROR
> 'inf' -> 1/0 ERROR
> 'nan' -> 0/0 ERROR
> '123/0' -> 1/0 ERROR
> '-123 / 0' -> -1/0 ERROR
> '' -> 0/0 ERROR
> '/' -> 0/0 ERROR
> ' 123  /  321' -> 41/107 OK
> 'foo/foo' -> 0/0 ERROR
> 'foo/1' -> 0/0 ERROR
> '1/foo' -> 1/0 ERROR
> '0/0' -> 0/0 ERROR
> '/0' -> 0/0 ERROR
> '1/' -> 1/0 ERROR
> '1' -> 1/1 OK
> '0' -> 0/1 ERROR
> '-123/123' -> -1/1 ERROR
> '-foo' -> 0/0 ERROR
> '123.23' -> 12323/100 OK
> '.23' -> 23/100 OK
> '-.23' -> -23/100 ERROR
> '-0.234' -> -117/500 ERROR
> '-0.0000001' -> -1/10000000 ERROR
> '  21332.2324   ' -> 917286/43 OK
> ' -21332.2324   ' -> -917286/43 ERROR
> 
> Testing av_parse_color()
> bikeshed -> R(80) G(64) B(140) A(59)
> RaNdOm -> R(185) G(88) B(148) A(94)
> Cannot find color 'foo'
> foo -> error
> red -> R(255) G(0) B(0) A(255)
> Cannot find color 'Red '
> Red  -> error
> RED -> R(255) G(0) B(0) A(255)
> Violet -> R(238) G(130) B(238) A(255)
> Yellow -> R(255) G(255) B(0) A(255)
> Red -> R(255) G(0) B(0) A(255)
> 0x000000 -> R(0) G(0) B(0) A(255)
> Invalid 0xRRGGBB[AA] color string: '0000000'
> 0x0000000 -> error
> 0xff000000 -> R(255) G(0) B(0) A(0)
> 0x3e34ff -> R(62) G(52) B(255) A(255)
> 0x3e34ffaa -> R(62) G(52) B(255) A(170)
> Invalid 0xRRGGBB[AA] color string: 'ffXXee'
> 0xffXXee -> error
> Invalid 0xRRGGBB[AA] color string: 'foobar'
> 0xfoobar -> error
> Invalid 0xRRGGBB[AA] color string: 'ffffeeeeeeee'
> 0xffffeeeeeeee -> error
> #ff0000 -> R(255) G(0) B(0) A(255)
> Invalid 0xRRGGBB[AA] color string: 'ffXX00'
> #ffXX00 -> error
> ff0000 -> R(255) G(0) B(0) A(255)
> Cannot find color 'ffXX00'
> ffXX00 -> error
> Invalid alpha value specifier 'foo' in 'red at foo'
> red at foo -> error
> Invalid alpha value specifier '10' in 'random at 10'
> random at 10 -> error
> 0xff0000 at 1.0 -> R(255) G(0) B(0) A(255)
> Invalid alpha value specifier '' in 'red@'
> red@ -> error
> Invalid alpha value specifier '0xfff' in 'red at 0xfff'
> red at 0xfff -> error
> red at 0xf -> R(255) G(0) B(0) A(15)
> Invalid alpha value specifier '2' in 'red at 2'
> red at 2 -> error
> red at 0.1 -> R(255) G(0) B(0) A(25)
> Invalid alpha value specifier '-1' in 'red at -1'
> red at -1 -> error
> red at 0.5 -> R(255) G(0) B(0) A(127)
> red at 1.0 -> R(255) G(0) B(0) A(255)
> Invalid alpha value specifier '256' in 'red at 256'
> red at 256 -> error
> Invalid alpha value specifier '10foo' in 'red at 10foo'
> red at 10foo -> error
> Invalid alpha value specifier '-1.0' in 'red at -1.0'
> red at -1.0 -> error
> red at -0.0 -> R(255) G(0) B(0) A(0)
> 
> Testing av_small_strptime()
> fmt:'%Y-%m-%d' spec:'2012-12-21' -> 2012-12-21 00:00:00
> fmt:'%Y - %m - %d' spec:'2012-12-21' -> 2012-12-21 00:00:00
> fmt:'%Y-%m-%d %H:%M:%S' spec:'2012-12-21 20:12:21' -> 2012-12-21 20:12:21
> fmt:'  %Y - %m - %d %H : %M : %S' spec:'   2012 - 12 -  21   20 : 12 : 21'
> -> 2012-12-21 20:12:21
> fmt:'  %Y - %b - %d %H : %M : %S' spec:'   2012 - nOV -  21   20 : 12 : 21'
> -> 2012-11-21 20:12:21
> fmt:'  %Y - %B - %d %H : %M : %S' spec:'   2012 - nOVemBeR -  21   20 : 12
> : 21' -> 2012-11-21 20:12:21
> fmt:'  %Y - %B%d %H : %M : %S' spec:'   2012 - may21   20 : 12 : 21' ->
> 2012-05-21 20:12:21
> fmt:'  %Y - %B%d %H : %M : %S' spec:'   2012 - mby21   20 : 12 : 21' ->
> error
> fmt:'  %Y - %B - %d %H : %M : %S' spec:'   2012 - JunE -  21   20 : 12 :
> 21' -> 2012-06-21 20:12:21
> fmt:'  %Y - %B - %d %H : %M : %S' spec:'   2012 - Jane -  21   20 : 12 :
> 21' -> error
> fmt:'  %Y - %B - %d %H : %M : %S' spec:'   2012 - January -  21   20 : 12 :
> 21' -> 2012-01-21 20:12:21
> 
> Testing av_parse_time()
> (now is 2012-03-17 09:14:13.2 +0100, local time is UTC+1)
> now                      ->     1331972053.200000 = 2012-03-17T08:14:13Z
> 12:35:46                 ->     1331984146.000000 = 2012-03-17T11:35:46Z
> 2000-12-20 0:02:47.5z    ->      977270567.500000 = 2000-12-20T00:02:47Z
> 2012 - 02-22  17:44:07   ->     1329929047.000000 = 2012-02-22T16:44:07Z
> 2000-12-20T010247.6      ->      977270567.600000 = 2000-12-20T00:02:47Z
> 2000-12-12 1:35:46+05:30 ->      976565146.000000 = 2000-12-11T20:05:46Z
> 2002-12-12 22:30:40-02   ->     1039739440.000000 = 2002-12-13T00:30:40Z
> 2:34:56.79               ->           +9296790000
> -1:23:45.67              ->           -5025670000
> 42.1729                  ->             +42172900
> -1729.42                 ->           -1729420000
> 12:34                    ->            +754000000
> PT2M4.0S                 -> error
> 
> Testing av_get_known_color_name()
> AliceBlue -> R(240) G(248) B(255) A(0)
> AntiqueWhite -> R(250) G(235) B(215) A(0)
> Aqua -> R(0) G(255) B(255) A(0)
> Aquamarine -> R(127) G(255) B(212) A(0)
> Azure -> R(240) G(255) B(255) A(0)
> Beige -> R(245) G(245) B(220) A(0)
> Bisque -> R(255) G(228) B(196) A(0)
> Black -> R(0) G(0) B(0) A(0)
> BlanchedAlmond -> R(255) G(235) B(205) A(0)
> Blue -> R(0) G(0) B(255) A(0)
> BlueViolet -> R(138) G(43) B(226) A(0)
> Brown -> R(165) G(42) B(42) A(0)
> BurlyWood -> R(222) G(184) B(135) A(0)
> CadetBlue -> R(95) G(158) B(160) A(0)
> Chartreuse -> R(127) G(255) B(0) A(0)
> Chocolate -> R(210) G(105) B(30) A(0)
> Coral -> R(255) G(127) B(80) A(0)
> CornflowerBlue -> R(100) G(149) B(237) A(0)
> Cornsilk -> R(255) G(248) B(220) A(0)
> Crimson -> R(220) G(20) B(60) A(0)
> Cyan -> R(0) G(255) B(255) A(0)
> DarkBlue -> R(0) G(0) B(139) A(0)
> DarkCyan -> R(0) G(139) B(139) A(0)
> DarkGoldenRod -> R(184) G(134) B(11) A(0)
> DarkGray -> R(169) G(169) B(169) A(0)
> DarkGreen -> R(0) G(100) B(0) A(0)
> DarkKhaki -> R(189) G(183) B(107) A(0)
> DarkMagenta -> R(139) G(0) B(139) A(0)
> DarkOliveGreen -> R(85) G(107) B(47) A(0)
> Darkorange -> R(255) G(140) B(0) A(0)
> DarkOrchid -> R(153) G(50) B(204) A(0)
> DarkRed -> R(139) G(0) B(0) A(0)
> DarkSalmon -> R(233) G(150) B(122) A(0)
> DarkSeaGreen -> R(143) G(188) B(143) A(0)
> DarkSlateBlue -> R(72) G(61) B(139) A(0)
> DarkSlateGray -> R(47) G(79) B(79) A(0)
> DarkTurquoise -> R(0) G(206) B(209) A(0)
> DarkViolet -> R(148) G(0) B(211) A(0)
> DeepPink -> R(255) G(20) B(147) A(0)
> DeepSkyBlue -> R(0) G(191) B(255) A(0)
> DimGray -> R(105) G(105) B(105) A(0)
> DodgerBlue -> R(30) G(144) B(255) A(0)
> FireBrick -> R(178) G(34) B(34) A(0)
> FloralWhite -> R(255) G(250) B(240) A(0)
> ForestGreen -> R(34) G(139) B(34) A(0)
> Fuchsia -> R(255) G(0) B(255) A(0)
> Gainsboro -> R(220) G(220) B(220) A(0)
> GhostWhite -> R(248) G(248) B(255) A(0)
> Gold -> R(255) G(215) B(0) A(0)
> GoldenRod -> R(218) G(165) B(32) A(0)
> Gray -> R(128) G(128) B(128) A(0)
> Green -> R(0) G(128) B(0) A(0)
> GreenYellow -> R(173) G(255) B(47) A(0)
> HoneyDew -> R(240) G(255) B(240) A(0)
> HotPink -> R(255) G(105) B(180) A(0)
> IndianRed -> R(205) G(92) B(92) A(0)
> Indigo -> R(75) G(0) B(130) A(0)
> Ivory -> R(255) G(255) B(240) A(0)
> Khaki -> R(240) G(230) B(140) A(0)
> Lavender -> R(230) G(230) B(250) A(0)
> LavenderBlush -> R(255) G(240) B(245) A(0)
> LawnGreen -> R(124) G(252) B(0) A(0)
> LemonChiffon -> R(255) G(250) B(205) A(0)
> LightBlue -> R(173) G(216) B(230) A(0)
> LightCoral -> R(240) G(128) B(128) A(0)
> LightCyan -> R(224) G(255) B(255) A(0)
> LightGoldenRodYellow -> R(250) G(250) B(210) A(0)
> LightGreen -> R(144) G(238) B(144) A(0)
> LightGrey -> R(211) G(211) B(211) A(0)
> LightPink -> R(255) G(182) B(193) A(0)
> LightSalmon -> R(255) G(160) B(122) A(0)
> LightSeaGreen -> R(32) G(178) B(170) A(0)
> LightSkyBlue -> R(135) G(206) B(250) A(0)
> LightSlateGray -> R(119) G(136) B(153) A(0)
> LightSteelBlue -> R(176) G(196) B(222) A(0)
> LightYellow -> R(255) G(255) B(224) A(0)
> Lime -> R(0) G(255) B(0) A(0)
> LimeGreen -> R(50) G(205) B(50) A(0)
> Linen -> R(250) G(240) B(230) A(0)
> Magenta -> R(255) G(0) B(255) A(0)
> Maroon -> R(128) G(0) B(0) A(0)
> MediumAquaMarine -> R(102) G(205) B(170) A(0)
> MediumBlue -> R(0) G(0) B(205) A(0)
> MediumOrchid -> R(186) G(85) B(211) A(0)
> MediumPurple -> R(147) G(112) B(216) A(0)
> MediumSeaGreen -> R(60) G(179) B(113) A(0)
> MediumSlateBlue -> R(123) G(104) B(238) A(0)
> MediumSpringGreen -> R(0) G(250) B(154) A(0)
> MediumTurquoise -> R(72) G(209) B(204) A(0)
> MediumVioletRed -> R(199) G(21) B(133) A(0)
> MidnightBlue -> R(25) G(25) B(112) A(0)
> MintCream -> R(245) G(255) B(250) A(0)
> MistyRose -> R(255) G(228) B(225) A(0)
> Moccasin -> R(255) G(228) B(181) A(0)
> NavajoWhite -> R(255) G(222) B(173) A(0)
> Navy -> R(0) G(0) B(128) A(0)
> OldLace -> R(253) G(245) B(230) A(0)
> Olive -> R(128) G(128) B(0) A(0)
> OliveDrab -> R(107) G(142) B(35) A(0)
> Orange -> R(255) G(165) B(0) A(0)
> OrangeRed -> R(255) G(69) B(0) A(0)
> 
> 
> Orchid -> R(218) G(112) B(214) A(0)
> PaleGoldenRod -> R(238) G(232) B(170) A(0)
> PaleGreen -> R(152) G(251) B(152) A(0)
> PaleTurquoise -> R(175) G(238) B(238) A(0)
> PaleVioletRed -> R(216) G(112) B(147) A(0)
> PapayaWhip -> R(255) G(239) B(213) A(0)
> PeachPuff -> R(255) G(218) B(185) A(0)
> Peru -> R(205) G(133) B(63) A(0)
> Pink -> R(255) G(192) B(203) A(0)
> Plum -> R(221) G(160) B(221) A(0)
> PowderBlue -> R(176) G(224) B(230) A(0)
> Purple -> R(128) G(0) B(128) A(0)
> Red -> R(255) G(0) B(0) A(0)
> RosyBrown -> R(188) G(143) B(143) A(0)
> RoyalBlue -> R(65) G(105) B(225) A(0)
> SaddleBrown -> R(139) G(69) B(19) A(0)
> Salmon -> R(250) G(128) B(114) A(0)
> SandyBrown -> R(244) G(164) B(96) A(0)
> SeaGreen -> R(46) G(139) B(87) A(0)
> SeaShell -> R(255) G(245) B(238) A(0)
> Sienna -> R(160) G(82) B(45) A(0)
> Silver -> R(192) G(192) B(192) A(0)
> SkyBlue -> R(135) G(206) B(235) A(0)
> SlateBlue -> R(106) G(90) B(205) A(0)
> SlateGray -> R(112) G(128) B(144) A(0)
> Snow -> R(255) G(250) B(250) A(0)
> SpringGreen -> R(0) G(255) B(127) A(0)
> SteelBlue -> R(70) G(130) B(180) A(0)
> Tan -> R(210) G(180) B(140) A(0)
> Teal -> R(0) G(128) B(128) A(0)
> Thistle -> R(216) G(191) B(216) A(0)
> Tomato -> R(255) G(99) B(71) A(0)
> Turquoise -> R(64) G(224) B(208) A(0)
> Violet -> R(238) G(130) B(238) A(0)
> Wheat -> R(245) G(222) B(179) A(0)
> White -> R(255) G(255) B(255) A(0)
> WhiteSmoke -> R(245) G(245) B(245) A(0)
> Yellow -> R(255) G(255) B(0) A(0)
> YellowGreen -> R(154) G(205) B(50) A(0)
> 
> Testing av_find_info_tag()
> 0. tag1 found: val1
> 1. tag2 found: val2
> 2. tag3 found: val3
> 3. tag4 not found
> 4. tag41 found: value 41
> 5. 41 not found
> 6. random1 not found
> 
> 
> 
> 
> 
> 
> 
> 
>> 
>>> +{
>>> +    /* 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, "GetDurationInSec 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;
>>> +
>>> +    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.
>>> +        void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
>>> +        update_options(&c->cookies, "cookies", u);
>>> +        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 *strreplace(const char *str, const char *from, const char
>> *to)
>>> +{
>>> +    /* Adjust each of the below values to suit your needs. */
>>> +    /* Increment positions cache size initially by this number. */
>>> +    size_t cache_sz_inc = 16;
>>> +    /* Thereafter, each time capacity needs to be increased,
>>> +     * multiply the increment by this factor. */
>>> +    const size_t cache_sz_inc_factor = 3;
>>> +    /* But never increment capacity by more than this number. */
>>> +    const size_t cache_sz_inc_max = 1048576;
>>> +
>>> +    char *pret, *ret = NULL;
>>> +    const char *pstr2, *pstr = str;
>>> +    size_t i, count = 0;
>>> +    uintptr_t *pos_cache_tmp, *pos_cache = NULL;
>>> +    size_t cache_sz = 0;
>>> +    size_t cpylen, orglen, retlen, tolen, fromlen = strlen(from);
>>> +
>>> +    /* Find all matches and cache their positions. */
>>> +    while ((pstr2 = av_stristr(pstr, from))) {
>>> +        count++;
>>> +        /* Increase the cache size when necessary. */
>>> +        if (cache_sz < count) {
>>> +            cache_sz += cache_sz_inc;
>>> +            pos_cache_tmp = av_realloc(pos_cache, sizeof(*pos_cache) *
>> cache_sz);
>>> +            if (!pos_cache_tmp) {
>>> +                goto end_strreplace;
>>> +            } else pos_cache = pos_cache_tmp;
>>> +            cache_sz_inc *= cache_sz_inc_factor;
>>> +            if (cache_sz_inc > cache_sz_inc_max) {
>>> +                cache_sz_inc = cache_sz_inc_max;
>>> +            }
>>> +        }
>>> +
>>> +        pos_cache[count-1] = pstr2 - str;
>>> +        pstr = pstr2 + fromlen;
>>> +    }
>>> +    orglen = pstr - str + strlen(pstr);
>>> +    /* Allocate memory for the post-replacement string. */
>>> +    if (count > 0) {
>>> +        tolen = strlen(to);
>>> +        retlen = orglen + (tolen - fromlen) * count;
>>> +    } else {
>>> +        retlen = orglen;
>>> +    }
>>> +    ret = av_malloc(retlen + 1);
>>> +    if (!ret) {
>>> +        goto end_strreplace;
>>> +    }
>>> +
>>> +    if (!count) {
>>> +        /* If no matches, then just duplicate the string. */
>>> +        av_strlcpy(ret, str, retlen + 1);
>>> +    } else {
>>> +        /* Otherwise, duplicate the string whilst performing
>>> +         * the replacements using the position cache. */
>>> +        pret = ret;
>>> +        memcpy(pret, str, pos_cache[0]);
>>> +        pret += pos_cache[0];
>>> +        for (i = 0; i < count; i++) {
>>> +            memcpy(pret, to, tolen);
>>> +            pret += tolen;
>>> +            pstr = str + pos_cache[i] + fromlen;
>>> +            cpylen = (i == count-1 ? orglen : pos_cache[i+1]) -
>> pos_cache[i] - fromlen;
>>> +            memcpy(pret, pstr, cpylen);
>>> +            pret += cpylen;
>>> +        }
>>> +        ret[retlen] = '\0';
>>> +    }
>>> +
>>> +end_strreplace:
>>> +    /* Free the cache and return the post-replacement string,
>>> +     * which will be NULL in the event of an error. */
>>> +    av_free(pos_cache);
>>> +    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;
>>> +    char *new_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, '$');
>>> +    if (!end)
>>> +        goto finish;
>>> +
>>> +    tmp_url = av_mallocz(MAX_URL_SIZE);
>>> +    if (!tmp_url) {
>>> +        return NULL;
>>> +    }
>>> +
>>> +    av_strlcpy(tmp_url, url, start - url+ 1);
>>> +    av_strlcat(tmp_url, start + marker_len, strlen(tmp_url) + end -
>> start - marker_len + 1);
>>> +    av_strlcat(tmp_url, end + 1, MAX_URL_SIZE);
>>> +
>>> +finish:
>>> +    av_free(prefix);
>>> +    new_url = strreplace(tmp_url ? tmp_url : url, marker, "%"PRId64);
>> 
>> Since you're no longer using a printf function, this replacement doesn't
>> make sense. You should replace with the actual value you want to substitute
>> instead.
>> 
>>> +    av_free(tmp_url);
>>> +    return new_url;
>>> +}
>>> +
>>> +static char *get_content_url(xmlNodePtr *baseurl_nodes, int
>> n_baseurl_nodes, xmlChar *rep_id_val, xmlChar *rep_bandwidth_val, xmlChar
>> *val)
>>> +{
>>> +    int i;
>>> +    xmlChar *text;
>>> +    char *url = NULL;
>>> +    char *tmp_str = av_mallocz(MAX_URL_SIZE);
>>> +    char *tmp_str_2 = NULL;
>>> +
>>> +    if (!tmp_str) {
>>> +        return NULL;
>>> +    }
>>> +    for (i = 0; i < n_baseurl_nodes; ++i) {
>>> +        if (baseurl_nodes[i] && baseurl_nodes[i]->children &&
>> baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
>>> +            text = xmlNodeGetContent(baseurl_nodes[i]->children);
>>> +            if (text) {
>>> +                tmp_str_2 = av_mallocz(MAX_URL_SIZE);
>>> +                if (!tmp_str_2) {
>>> +                    av_free(tmp_str);
>>> +                    return NULL;
>>> +                }
>>> +                ff_make_absolute_url(tmp_str_2, MAX_URL_SIZE, tmp_str,
>> text);
>>> +                av_free(tmp_str);
>>> +                tmp_str = tmp_str_2;
>>> +                xmlFree(text);
>>> +            }
>>> +        }
>>> +    }
>>> +    if (val)
>>> +        av_strlcat(tmp_str, (const char*)val, MAX_URL_SIZE);
>>> +    if (rep_id_val) {
>>> +        url = strreplace(tmp_str, "$RepresentationID$", (const
>> char*)rep_id_val);
>>> +        av_free(tmp_str);
>>> +        tmp_str = url;
>>> +    }
>>> +    if (rep_bandwidth_val && tmp_str)
>>> +        url = strreplace(tmp_str, "$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 findChildNodeByName(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 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);
>>> +            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);
>>> +            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)atoll((const char *)val);
>>> +            } else if (!xmlStrcmp(attr->name, (const xmlChar *)"r")) {
>>> +                tml->r =(int32_t) atoi((const char *)val);
>>> +            } else if (!xmlStrcmp(attr->name, (const xmlChar *)"d")) {
>>> +                tml->d = (int64_t)atoll((const char *)val);
>>> +                rep->fragment_duration = (int64_t) atoll((const char
>> *)val);
>>> +            }
>>> +            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 = findChildNodeByName(representation_node,
>> "SegmentTemplate");
>>> +        representation_baseurl_node = findChildNodeByName(representation_node,
>> "BaseURL");
>>> +        representation_segmentlist_node = findChildNodeByName(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);
>>> +                rep->init_section->size = -1;
>>> +                xmlFree(initialization_val);
>>> +            }
>>> +
>>> +            if (media_val) {
>>> +                temp_string = get_content_url(baseurl_nodes, 4,
>> rep_id_val, rep_bandwidth_val, media_val);
>>> +                if (temp_string) {
>>> +                    if (av_stristr(temp_string, "$Number")) {
>>> +                        rep->url_template = av_strdup(temp_string);
>> 
>> Since you're no longer replacing here, this if/else tree mostly doesn't
>> make sense anymore. You should remove the av_free below and store the
>> result of get_content_url() directly to rep->url_template, and just have a
>> check here to set tmp_url_type. Also, you need to check for a NULL return
>> from get_content_url.
>> 
>>> +                        /* A URL template is provided from which
>> clients build a chunk list
>>> +                         * where the chunk URLs include chunk numbers
>> (like index numbers).
>>> +                         */
>>> +                        rep->tmp_url_type = TMP_URL_TYPE_NUMBER;  /*
>> Number-Based. */
>>> +                    } else if (av_stristr(temp_string, "$Time")) {
>>> +                        rep->url_template = av_strdup(temp_string);
>>> +                        /* A URL template is provided from which
>> clients build a chunk list
>>> +                         * where the chunk URLs include chunk start
>> times.
>>> +                         */
>>> +                        rep->tmp_url_type = TMP_URL_TYPE_TIME; /*
>> Time-Based. */
>>> +                    } else {
>>> +                        rep->url_template = temp_string;
>>> +                        temp_string = NULL;
>>> +                    }
>>> +                    av_free(temp_string);
>>> +                }
>>> +                xmlFree(media_val);
>>> +            }
>>> +            if (duration_val) {
>>> +                rep->fragment_duration = (int64_t) atoll((const char
>> *)duration_val);
>>> +                xmlFree(duration_val);
>>> +            }
>>> +            if (timescale_val) {
>>> +                rep->fragment_timescale = (int64_t) atoll((const char
>> *)timescale_val);
>>> +                xmlFree(timescale_val);
>>> +            }
>>> +            if (startnumber_val) {
>>> +                rep->first_seq_no = (int64_t) atoll((const char
>> *)startnumber_val);
>>> +                xmlFree(startnumber_val);
>>> +            }
>>> +
>>> +            fragment_timeline_node = findChildNodeByName(
>> representation_segmenttemplate_node, "SegmentTimeline");
>>> +
>>> +            if (!fragment_timeline_node)
>>> +                fragment_timeline_node = findChildNodeByName(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);
>>> +            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) atoll((const char
>> *)duration_val);
>>> +                xmlFree(duration_val);
>>> +            }
>>> +            if (timescale_val) {
>>> +                rep->fragment_timescale = (int64_t) atoll((const char
>> *)timescale_val);
>>> +                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){
>> 
>> Space between ) and { (this occurs a few times).
>> 
>>> +        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 = GetUTCDateTimeInSec(s,
>> (const char *)val);
>>> +            } else if (!xmlStrcmp(attr->name, (const xmlChar
>> *)"publishTime")) {
>>> +                c->publish_time_sec = GetUTCDateTimeInSec(s, (const
>> char *)val);
>>> +            } else if (!xmlStrcmp(attr->name, (const xmlChar
>> *)"minimumUpdatePeriod")) {
>>> +                c->minimum_update_period_sec = GetDurationInSec(s,
>> (const char *)val);
>>> +            } else if (!xmlStrcmp(attr->name, (const xmlChar
>> *)"timeShiftBufferDepth")) {
>>> +                c->time_shift_buffer_depth_sec = GetDurationInSec(s,
>> (const char *)val);
>>> +            } else if (!xmlStrcmp(attr->name, (const xmlChar
>> *)"minBufferTime")) {
>>> +                c->min_buffer_time_sec = GetDurationInSec(s, (const
>> char *)val);
>>> +            } else if (!xmlStrcmp(attr->name, (const xmlChar
>> *)"suggestedPresentationDelay")) {
>>> +                c->suggested_presentation_delay_sec =
>> GetDurationInSec(s, (const char *)val);
>>> +            } else if (!xmlStrcmp(attr->name, (const xmlChar
>> *)"mediaPresentationDuration")) {
>>> +                c->media_presentation_duration_sec =
>> GetDurationInSec(s, (const char *)val);
>>> +            }
>>> +            attr = attr->next;
>>> +            xmlFree(val);
>>> +        }
>>> +
>>> +        mpd_baseurl_node = findChildNodeByName(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 = GetDurationInSec(s,
>> (const char *)val);
>>> +                    } else if (!xmlStrcmp(attr->name, (const xmlChar
>> *)"start")) {
>>> +                        perdiod_start_sec = GetDurationInSec(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;
>>> +        }
>>> +        // explore AdaptationSet
>>> +        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) {
>>> +        if (!pls->fragment_duration) {
>>> +            av_log(s, AV_LOG_ERROR, "Get not get fragment duration
>> value in live mode\n");
>>> +            return pls->first_seq_no;
>>> +        }
>>> +        num = pls->first_seq_no + (((GetCurrentTimeInSec() -
>> 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) {
>>> +        if (!pls->fragment_duration) {
>>> +            av_log(s, AV_LOG_ERROR, "Get not get fragment duration
>> value in live mode\n");
>>> +            return pls->first_seq_no;
>>> +        }
>>> +        num = pls->first_seq_no + (((GetCurrentTimeInSec() -
>> 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) {
>>> +        if (!pls->fragment_duration) {
>>> +            av_log(s, AV_LOG_ERROR, "Get not get fragment duration
>> value in live mode\n");
>>> +            return pls->first_seq_no;
>>> +        }
>>> +        num = pls->first_seq_no + (((GetCurrentTimeInSec() -
>> 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) {
>> 
>> It's not a security issue like with printf functions, but you shouldn't
>> use av_get_frame_filename() with arbitrary format-string input either, as
>> it will fail if the input already contained a '%' character. I also don't
>> understand how this is supposed to work, since your source string
>> (url_template) shouldn't contain a "%d"?
>> 
>>> +                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
>> [%d]\n", pls->tmp_url_type);
>> 
>> Since this shouldn't be possible, an av_assert0 is applicable; no need to
>> log the value.
>> 
>>> +                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) {
>>> +                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) {
>>> +        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,
>>> +};
>>> --
>>> 2.10.1 (Apple Git-78)
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> ffmpeg-devel mailing list
>>> ffmpeg-devel at ffmpeg.org
>>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>> 
>> _______________________________________________
>> ffmpeg-devel mailing list
>> ffmpeg-devel at ffmpeg.org <mailto:ffmpeg-devel at ffmpeg.org>
>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel <http://ffmpeg.org/mailman/listinfo/ffmpeg-devel>
>> 
> _______________________________________________
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> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel <http://ffmpeg.org/mailman/listinfo/ffmpeg-devel>


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