fix ticket 7382

fix ticket id: #7369 #7382.
use ((wallclock - availability_start_time) * timescale -presentation_timeoffset) / duration
Signed-off-by: Steven Liu <lq@onvideo.cn>

Signed-off-by: Steven Liu <lq@onvideo.cn>

if there have min_buffer_time in playlist, use the min_buffer_time
value for realtime.
Signed-off-by: Steven Liu <lq@onvideo.cn>

Signed-off-by: Steven Liu <lq@onvideo.cn>

Signed-off-by: Steven Liu <lq@onvideo.cn>

Signed-off-by: Steven Liu <lq@onvideo.cn>

Signed-off-by: Steven Liu <lq@onvideo.cn>

Signed-off-by: Steven Liu <lq@onvideo.cn>

Reviewed-by: Steven Liu <lq@chinaffmpeg.org>

Fixes: dash-crash-da39a3ee5e6b4b0d3255bfef95601890afd80709.xml
Found-by: Paul Ch <paulcher@icloud.com>
Reviewed-by: Steven Liu <lq@chinaffmpeg.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

The following patch supports parsing negative value of the @r attribute of S in SegmentTimeline element.

Example streams:
1. http://dash.edgesuite.net/dash264/TestCases/1c/qualcomm/1/MultiRate.mpd
2. http://dash.edgesuite.net/dash264/TestCases/1c/qualcomm/2/MultiRate.mpd

Fixes ticket #7338.

Based on a patch for hls by Richard Shaffer
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

Can be reproduced with:  valgrind  --leak-check=full  -v ffmpeg -i
http://yt-dash-mse-test.commondatastorage.googleapis.com/media/motion-20120802-manifest.mpdReviewed-by: Steven Liu <lq@onvideo.cn>
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

fix for ticket #7336
Reviewed-by: Steven Liu <lq@onvideo.cn>
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

simplify the code to check common init section

Add NULL pointer check for init_section

Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

Signed-off-by: guikunzhi <guikunzhi@163.com>

Fixes a warning:
libavformat/dashdec.c:1900:65: warning: argument to 'sizeof' in 'memcpy' call is the same pointer type 'struct fragment *' as the destination; expected 'struct fragment' or an explicit length

libavformat/dashdec: Avoid multiple HTTP requests for initialization segment that is common among all representations
Reviewed-by: Steven Liu <lq@chinaffmpeg.org>
Signed-off-by: sanilraut <raut.sanil@gmail.com>

Revert "avformat/dashdec: Avoid multiple HTTP requests for initialization segment that is common among all representations"

This reverts commit 4effd1c4.

avformat/dashdec: Avoid multiple HTTP requests for initialization segment that is common among all representations
Reviewed-by: Steven Liu <lq@chinaffmpeg.org>
Signed-off-by: sanilraut <raut.sanil@gmail.com>

Last segment indicated by mpd is not parsed.
Example stream: http://dash.akamaized.net/dash264/TestCasesIOP41/LastSegmentNumber/1/manifest_last_segment_num.mpd

This patch supports parsing of Supplemental Descriptor with @schemeIdUri set to http://dashif.org/guide-
lines/last-segment-number with the @value set to the last segment number.
Reviewed-by: Steven Liu <lq@onvideo.cn>

Signed-off-by: Steven Liu <lingjiujianke@gmail.com>

Reviewed-by: Steven Liu <lq@onvideo.cn>

If first_seq_no is not within the bounds of timelines then a segfault
will occur.
This patch removes the use of first_seq_no within the timelines array
It also adds first_seq_no to the value returned by calc_next_seg_no_from_timelines
(which allows for different values of 'startNumber')
Signed-off-by: Brendan McGrath <redmcg@redmandi.dyndns.org>

1 Add function 'resolve_content_path' to propagate the baseURL from
upper level nodes.
 * if no baseURL is available, the path of mpd file will be set as the baseURL.
2 Remove checking for newly established connection.
3 Establish the communication protocol in each connection rather than
 applying one protocol to all connection.

If no representation bandwidth value is set, the url value returned
by get_content_url is corrupt (as it has been freed).
This change ensures the url string is not freed unless it is about
to be reused
Changes since v1:
 1 removed the unneeded 'if' statement (as pointed out by Michael Niedermayer
 2 added comment to make it clear why the av_free was required
Signed-off-by: Brendan McGrath <redmcg@redmandi.dyndns.org>

If the manifest provides this, setting r_frame_rate
avoids warnings regarding frame rate estimation.

Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

dash_read_seek() is called only once to issue a seek
of *all* streams to the specified timestamp. But to
avoid reopening each stream, do a "dry run" for streams
that are in a discarded state.
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

Signed-off-by: Steven Liu <lq@chinaffmpeg.org>