mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
8306074dc6
Reviewed-by: Steven Liu <lingjiujianke@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2380 lines
80 KiB
C
2380 lines
80 KiB
C
/*
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* Dynamic Adaptive Streaming over HTTP demux
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* Copyright (c) 2017 samsamsam@o2.pl based on HLS demux
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* Copyright (c) 2017 Steven Liu
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <libxml/parser.h>
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#include "libavutil/bprint.h"
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#include "libavutil/opt.h"
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#include "libavutil/time.h"
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#include "libavutil/parseutils.h"
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#include "internal.h"
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#include "avio_internal.h"
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#include "dash.h"
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#include "demux.h"
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#define INITIAL_BUFFER_SIZE 32768
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struct fragment {
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int64_t url_offset;
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int64_t size;
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char *url;
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};
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/*
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* reference to : ISO_IEC_23009-1-DASH-2012
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* Section: 5.3.9.6.2
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* Table: Table 17 — Semantics of SegmentTimeline element
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* */
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struct timeline {
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/* starttime: Element or Attribute Name
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* specifies the MPD start time, in @timescale units,
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* the first Segment in the series starts relative to the beginning of the Period.
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* The value of this attribute must be equal to or greater than the sum of the previous S
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* element earliest presentation time and the sum of the contiguous Segment durations.
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* If the value of the attribute is greater than what is expressed by the previous S element,
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* it expresses discontinuities in the timeline.
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* If not present then the value shall be assumed to be zero for the first S element
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* and for the subsequent S elements, the value shall be assumed to be the sum of
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* the previous S element's earliest presentation time and contiguous duration
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* (i.e. previous S@starttime + @duration * (@repeat + 1)).
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* */
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int64_t starttime;
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/* repeat: Element or Attribute Name
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* specifies the repeat count of the number of following contiguous Segments with
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* the same duration expressed by the value of @duration. This value is zero-based
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* (e.g. a value of three means four Segments in the contiguous series).
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* */
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int64_t repeat;
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/* duration: Element or Attribute Name
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* specifies the Segment duration, in units of the value of the @timescale.
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* */
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int64_t duration;
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};
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/*
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* Each playlist has its own demuxer. If it is currently active,
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* it has an opened AVIOContext too, and potentially an AVPacket
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* containing the next packet from this stream.
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*/
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struct representation {
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char *url_template;
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FFIOContext pb;
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AVIOContext *input;
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AVFormatContext *parent;
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AVFormatContext *ctx;
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int stream_index;
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char *id;
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char *lang;
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int bandwidth;
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AVRational framerate;
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AVStream *assoc_stream; /* demuxer stream associated with this representation */
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int n_fragments;
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struct fragment **fragments; /* VOD list of fragment for profile */
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int n_timelines;
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struct timeline **timelines;
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int64_t first_seq_no;
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int64_t last_seq_no;
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int64_t start_number; /* used in case when we have dynamic list of segment to know which segments are new one*/
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int64_t fragment_duration;
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int64_t fragment_timescale;
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int64_t presentation_timeoffset;
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int64_t cur_seq_no;
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int64_t cur_seg_offset;
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int64_t cur_seg_size;
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struct fragment *cur_seg;
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/* Currently active Media Initialization Section */
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struct fragment *init_section;
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uint8_t *init_sec_buf;
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uint32_t init_sec_buf_size;
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uint32_t init_sec_data_len;
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uint32_t init_sec_buf_read_offset;
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int64_t cur_timestamp;
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int is_restart_needed;
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};
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typedef struct DASHContext {
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const AVClass *class;
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char *base_url;
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int n_videos;
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struct representation **videos;
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int n_audios;
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struct representation **audios;
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int n_subtitles;
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struct representation **subtitles;
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/* MediaPresentationDescription Attribute */
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uint64_t media_presentation_duration;
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uint64_t suggested_presentation_delay;
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uint64_t availability_start_time;
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uint64_t availability_end_time;
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uint64_t publish_time;
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uint64_t minimum_update_period;
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uint64_t time_shift_buffer_depth;
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uint64_t min_buffer_time;
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/* Period Attribute */
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uint64_t period_duration;
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uint64_t period_start;
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/* AdaptationSet Attribute */
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char *adaptionset_lang;
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int is_live;
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AVIOInterruptCB *interrupt_callback;
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char *allowed_extensions;
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AVDictionary *avio_opts;
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int max_url_size;
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char *cenc_decryption_key;
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/* Flags for init section*/
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int is_init_section_common_video;
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int is_init_section_common_audio;
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int is_init_section_common_subtitle;
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} DASHContext;
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static int ishttp(char *url)
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{
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const char *proto_name = avio_find_protocol_name(url);
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return proto_name && av_strstart(proto_name, "http", NULL);
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}
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static int aligned(int val)
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{
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return ((val + 0x3F) >> 6) << 6;
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}
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static uint64_t get_current_time_in_sec(void)
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{
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return av_gettime() / 1000000;
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}
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static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char *datetime)
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{
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struct tm timeinfo;
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int year = 0;
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int month = 0;
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int day = 0;
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int hour = 0;
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int minute = 0;
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int ret = 0;
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float second = 0.0;
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/* ISO-8601 date parser */
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if (!datetime)
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return 0;
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ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second);
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/* year, month, day, hour, minute, second 6 arguments */
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if (ret != 6) {
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av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong time format\n");
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}
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timeinfo.tm_year = year - 1900;
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timeinfo.tm_mon = month - 1;
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timeinfo.tm_mday = day;
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timeinfo.tm_hour = hour;
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timeinfo.tm_min = minute;
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timeinfo.tm_sec = (int)second;
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return av_timegm(&timeinfo);
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}
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static uint32_t get_duration_insec(AVFormatContext *s, const char *duration)
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{
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/* ISO-8601 duration parser */
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uint32_t days = 0;
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uint32_t hours = 0;
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uint32_t mins = 0;
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uint32_t secs = 0;
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int size = 0;
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float value = 0;
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char type = '\0';
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const char *ptr = duration;
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while (*ptr) {
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if (*ptr == 'P' || *ptr == 'T') {
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ptr++;
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continue;
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}
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if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
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av_log(s, AV_LOG_WARNING, "get_duration_insec get a wrong time format\n");
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return 0; /* parser error */
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}
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switch (type) {
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case 'D':
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days = (uint32_t)value;
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break;
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case 'H':
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hours = (uint32_t)value;
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break;
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case 'M':
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mins = (uint32_t)value;
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break;
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case 'S':
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secs = (uint32_t)value;
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break;
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default:
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// handle invalid type
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break;
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}
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ptr += size;
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}
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return ((days * 24 + hours) * 60 + mins) * 60 + secs;
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}
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static int64_t get_segment_start_time_based_on_timeline(struct representation *pls, int64_t cur_seq_no)
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{
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int64_t start_time = 0;
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int64_t i = 0;
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int64_t j = 0;
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int64_t num = 0;
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if (pls->n_timelines) {
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for (i = 0; i < pls->n_timelines; i++) {
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if (pls->timelines[i]->starttime > 0) {
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start_time = pls->timelines[i]->starttime;
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}
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if (num == cur_seq_no)
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goto finish;
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start_time += pls->timelines[i]->duration;
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if (pls->timelines[i]->repeat == -1) {
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start_time = pls->timelines[i]->duration * cur_seq_no;
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goto finish;
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}
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for (j = 0; j < pls->timelines[i]->repeat; j++) {
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num++;
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if (num == cur_seq_no)
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goto finish;
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start_time += pls->timelines[i]->duration;
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}
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num++;
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}
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}
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finish:
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return start_time;
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}
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static int64_t calc_next_seg_no_from_timelines(struct representation *pls, int64_t cur_time)
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{
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int64_t i = 0;
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int64_t j = 0;
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int64_t num = 0;
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int64_t start_time = 0;
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for (i = 0; i < pls->n_timelines; i++) {
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if (pls->timelines[i]->starttime > 0) {
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start_time = pls->timelines[i]->starttime;
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}
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if (start_time > cur_time)
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goto finish;
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start_time += pls->timelines[i]->duration;
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for (j = 0; j < pls->timelines[i]->repeat; j++) {
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num++;
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if (start_time > cur_time)
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goto finish;
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start_time += pls->timelines[i]->duration;
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}
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num++;
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}
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return -1;
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finish:
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return num;
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}
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static void free_fragment(struct fragment **seg)
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{
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if (!(*seg)) {
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return;
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}
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av_freep(&(*seg)->url);
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av_freep(seg);
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}
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static void free_fragment_list(struct representation *pls)
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{
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int i;
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for (i = 0; i < pls->n_fragments; i++) {
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free_fragment(&pls->fragments[i]);
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}
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av_freep(&pls->fragments);
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pls->n_fragments = 0;
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}
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static void free_timelines_list(struct representation *pls)
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{
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int i;
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for (i = 0; i < pls->n_timelines; i++) {
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av_freep(&pls->timelines[i]);
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}
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av_freep(&pls->timelines);
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pls->n_timelines = 0;
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}
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static void free_representation(struct representation *pls)
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{
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free_fragment_list(pls);
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free_timelines_list(pls);
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free_fragment(&pls->cur_seg);
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free_fragment(&pls->init_section);
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av_freep(&pls->init_sec_buf);
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av_freep(&pls->pb.pub.buffer);
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ff_format_io_close(pls->parent, &pls->input);
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if (pls->ctx) {
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pls->ctx->pb = NULL;
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avformat_close_input(&pls->ctx);
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}
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av_freep(&pls->url_template);
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av_freep(&pls->lang);
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av_freep(&pls->id);
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av_freep(&pls);
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}
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static void free_video_list(DASHContext *c)
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{
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int i;
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for (i = 0; i < c->n_videos; i++) {
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struct representation *pls = c->videos[i];
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free_representation(pls);
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}
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av_freep(&c->videos);
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c->n_videos = 0;
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}
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static void free_audio_list(DASHContext *c)
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{
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int i;
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for (i = 0; i < c->n_audios; i++) {
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struct representation *pls = c->audios[i];
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free_representation(pls);
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}
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av_freep(&c->audios);
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c->n_audios = 0;
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}
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static void free_subtitle_list(DASHContext *c)
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{
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int i;
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for (i = 0; i < c->n_subtitles; i++) {
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struct representation *pls = c->subtitles[i];
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free_representation(pls);
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}
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av_freep(&c->subtitles);
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c->n_subtitles = 0;
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}
|
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static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
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AVDictionary **opts, AVDictionary *opts2, int *is_http)
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{
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DASHContext *c = s->priv_data;
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AVDictionary *tmp = NULL;
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const char *proto_name = NULL;
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int proto_name_len;
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int ret;
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|
|
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if (av_strstart(url, "crypto", NULL)) {
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if (url[6] == '+' || url[6] == ':')
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proto_name = avio_find_protocol_name(url + 7);
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}
|
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|
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if (!proto_name)
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proto_name = avio_find_protocol_name(url);
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|
|
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if (!proto_name)
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return AVERROR_INVALIDDATA;
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|
|
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proto_name_len = strlen(proto_name);
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// only http(s) & file are allowed
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if (av_strstart(proto_name, "file", NULL)) {
|
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if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
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av_log(s, AV_LOG_ERROR,
|
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"Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
|
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"If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
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url);
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return AVERROR_INVALIDDATA;
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}
|
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} else if (av_strstart(proto_name, "http", NULL)) {
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;
|
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} else
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return AVERROR_INVALIDDATA;
|
|
|
|
if (!strncmp(proto_name, url, proto_name_len) && url[proto_name_len] == ':')
|
|
;
|
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else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, proto_name_len) && url[7 + proto_name_len] == ':')
|
|
;
|
|
else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
|
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return AVERROR_INVALIDDATA;
|
|
|
|
av_freep(pb);
|
|
av_dict_copy(&tmp, *opts, 0);
|
|
av_dict_copy(&tmp, opts2, 0);
|
|
ret = avio_open2(pb, url, AVIO_FLAG_READ, c->interrupt_callback, &tmp);
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|
if (ret >= 0) {
|
|
// update cookies on http response with setcookies.
|
|
char *new_cookies = NULL;
|
|
|
|
if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))
|
|
av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);
|
|
|
|
if (new_cookies) {
|
|
av_dict_set(opts, "cookies", new_cookies, AV_DICT_DONT_STRDUP_VAL);
|
|
}
|
|
|
|
}
|
|
|
|
av_dict_free(&tmp);
|
|
|
|
if (is_http)
|
|
*is_http = av_strstart(proto_name, "http", NULL);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static char *get_content_url(xmlNodePtr *baseurl_nodes,
|
|
int n_baseurl_nodes,
|
|
int max_url_size,
|
|
char *rep_id_val,
|
|
char *rep_bandwidth_val,
|
|
char *val)
|
|
{
|
|
int i;
|
|
char *text;
|
|
char *url = NULL;
|
|
char *tmp_str = av_mallocz(max_url_size);
|
|
|
|
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) {
|
|
memset(tmp_str, 0, max_url_size);
|
|
ff_make_absolute_url(tmp_str, max_url_size, "", text);
|
|
xmlFree(text);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (val)
|
|
ff_make_absolute_url(tmp_str, max_url_size, tmp_str, val);
|
|
|
|
if (rep_id_val) {
|
|
url = av_strireplace(tmp_str, "$RepresentationID$", rep_id_val);
|
|
if (!url) {
|
|
goto end;
|
|
}
|
|
av_strlcpy(tmp_str, url, max_url_size);
|
|
}
|
|
if (rep_bandwidth_val && tmp_str[0] != '\0') {
|
|
// free any previously assigned url before reassigning
|
|
av_free(url);
|
|
url = av_strireplace(tmp_str, "$Bandwidth$", rep_bandwidth_val);
|
|
if (!url) {
|
|
goto end;
|
|
}
|
|
}
|
|
end:
|
|
av_free(tmp_str);
|
|
return url;
|
|
}
|
|
|
|
static char *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const char *attrname)
|
|
{
|
|
int i;
|
|
char *val;
|
|
|
|
for (i = 0; i < n_nodes; ++i) {
|
|
if (nodes[i]) {
|
|
val = xmlGetProp(nodes[i], attrname);
|
|
if (val)
|
|
return val;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const char *nodename)
|
|
{
|
|
xmlNodePtr node = rootnode;
|
|
if (!node) {
|
|
return NULL;
|
|
}
|
|
|
|
node = xmlFirstElementChild(node);
|
|
while (node) {
|
|
if (!av_strcasecmp(node->name, nodename)) {
|
|
return node;
|
|
}
|
|
node = xmlNextElementSibling(node);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static enum AVMediaType get_content_type(xmlNodePtr node)
|
|
{
|
|
enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
|
|
int i = 0;
|
|
const char *attr;
|
|
char *val = NULL;
|
|
|
|
if (node) {
|
|
for (i = 0; i < 2; i++) {
|
|
attr = i ? "mimeType" : "contentType";
|
|
val = xmlGetProp(node, attr);
|
|
if (val) {
|
|
if (av_stristr(val, "video")) {
|
|
type = AVMEDIA_TYPE_VIDEO;
|
|
} else if (av_stristr(val, "audio")) {
|
|
type = AVMEDIA_TYPE_AUDIO;
|
|
} else if (av_stristr(val, "text")) {
|
|
type = AVMEDIA_TYPE_SUBTITLE;
|
|
}
|
|
xmlFree(val);
|
|
}
|
|
}
|
|
}
|
|
return type;
|
|
}
|
|
|
|
static struct fragment * get_Fragment(char *range)
|
|
{
|
|
struct fragment * seg = av_mallocz(sizeof(struct fragment));
|
|
|
|
if (!seg)
|
|
return NULL;
|
|
|
|
seg->size = -1;
|
|
if (range) {
|
|
char *str_end_offset;
|
|
char *str_offset = av_strtok(range, "-", &str_end_offset);
|
|
seg->url_offset = strtoll(str_offset, NULL, 10);
|
|
seg->size = strtoll(str_end_offset, NULL, 10) - seg->url_offset + 1;
|
|
}
|
|
|
|
return seg;
|
|
}
|
|
|
|
static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep,
|
|
xmlNodePtr fragmenturl_node,
|
|
xmlNodePtr *baseurl_nodes,
|
|
char *rep_id_val,
|
|
char *rep_bandwidth_val)
|
|
{
|
|
DASHContext *c = s->priv_data;
|
|
char *initialization_val = NULL;
|
|
char *media_val = NULL;
|
|
char *range_val = NULL;
|
|
int max_url_size = c ? c->max_url_size: MAX_URL_SIZE;
|
|
int err;
|
|
|
|
if (!av_strcasecmp(fragmenturl_node->name, "Initialization")) {
|
|
initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
|
|
range_val = xmlGetProp(fragmenturl_node, "range");
|
|
if (initialization_val || range_val) {
|
|
free_fragment(&rep->init_section);
|
|
rep->init_section = get_Fragment(range_val);
|
|
xmlFree(range_val);
|
|
if (!rep->init_section) {
|
|
xmlFree(initialization_val);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
rep->init_section->url = get_content_url(baseurl_nodes, 4,
|
|
max_url_size,
|
|
rep_id_val,
|
|
rep_bandwidth_val,
|
|
initialization_val);
|
|
xmlFree(initialization_val);
|
|
if (!rep->init_section->url) {
|
|
av_freep(&rep->init_section);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
}
|
|
} else if (!av_strcasecmp(fragmenturl_node->name, "SegmentURL")) {
|
|
media_val = xmlGetProp(fragmenturl_node, "media");
|
|
range_val = xmlGetProp(fragmenturl_node, "mediaRange");
|
|
if (media_val || range_val) {
|
|
struct fragment *seg = get_Fragment(range_val);
|
|
xmlFree(range_val);
|
|
if (!seg) {
|
|
xmlFree(media_val);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
seg->url = get_content_url(baseurl_nodes, 4,
|
|
max_url_size,
|
|
rep_id_val,
|
|
rep_bandwidth_val,
|
|
media_val);
|
|
xmlFree(media_val);
|
|
if (!seg->url) {
|
|
av_free(seg);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
err = av_dynarray_add_nofree(&rep->fragments, &rep->n_fragments, seg);
|
|
if (err < 0) {
|
|
free_fragment(&seg);
|
|
return err;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep,
|
|
xmlNodePtr fragment_timeline_node)
|
|
{
|
|
xmlAttrPtr attr = NULL;
|
|
char *val = NULL;
|
|
int err;
|
|
|
|
if (!av_strcasecmp(fragment_timeline_node->name, "S")) {
|
|
struct timeline *tml = av_mallocz(sizeof(struct timeline));
|
|
if (!tml) {
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
attr = fragment_timeline_node->properties;
|
|
while (attr) {
|
|
val = xmlGetProp(fragment_timeline_node, attr->name);
|
|
|
|
if (!val) {
|
|
av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name);
|
|
continue;
|
|
}
|
|
|
|
if (!av_strcasecmp(attr->name, "t")) {
|
|
tml->starttime = (int64_t)strtoll(val, NULL, 10);
|
|
} else if (!av_strcasecmp(attr->name, "r")) {
|
|
tml->repeat =(int64_t) strtoll(val, NULL, 10);
|
|
} else if (!av_strcasecmp(attr->name, "d")) {
|
|
tml->duration = (int64_t)strtoll(val, NULL, 10);
|
|
}
|
|
attr = attr->next;
|
|
xmlFree(val);
|
|
}
|
|
err = av_dynarray_add_nofree(&rep->timelines, &rep->n_timelines, tml);
|
|
if (err < 0) {
|
|
av_free(tml);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int resolve_content_path(AVFormatContext *s, const char *url, int *max_url_size, xmlNodePtr *baseurl_nodes, int n_baseurl_nodes)
|
|
{
|
|
char *tmp_str = NULL;
|
|
char *path = NULL;
|
|
char *mpdName = NULL;
|
|
xmlNodePtr node = NULL;
|
|
char *baseurl = NULL;
|
|
char *root_url = NULL;
|
|
char *text = NULL;
|
|
char *tmp = NULL;
|
|
int isRootHttp = 0;
|
|
char token ='/';
|
|
int start = 0;
|
|
int rootId = 0;
|
|
int updated = 0;
|
|
int size = 0;
|
|
int i;
|
|
int tmp_max_url_size = strlen(url);
|
|
|
|
for (i = n_baseurl_nodes-1; i >= 0 ; i--) {
|
|
text = xmlNodeGetContent(baseurl_nodes[i]);
|
|
if (!text)
|
|
continue;
|
|
tmp_max_url_size += strlen(text);
|
|
if (ishttp(text)) {
|
|
xmlFree(text);
|
|
break;
|
|
}
|
|
xmlFree(text);
|
|
}
|
|
|
|
tmp_max_url_size = aligned(tmp_max_url_size);
|
|
text = av_mallocz(tmp_max_url_size);
|
|
if (!text) {
|
|
updated = AVERROR(ENOMEM);
|
|
goto end;
|
|
}
|
|
av_strlcpy(text, url, strlen(url)+1);
|
|
tmp = text;
|
|
while (mpdName = av_strtok(tmp, "/", &tmp)) {
|
|
size = strlen(mpdName);
|
|
}
|
|
av_free(text);
|
|
|
|
path = av_mallocz(tmp_max_url_size);
|
|
tmp_str = av_mallocz(tmp_max_url_size);
|
|
if (!tmp_str || !path) {
|
|
updated = AVERROR(ENOMEM);
|
|
goto end;
|
|
}
|
|
|
|
av_strlcpy (path, url, strlen(url) - size + 1);
|
|
for (rootId = n_baseurl_nodes - 1; rootId > 0; rootId --) {
|
|
if (!(node = baseurl_nodes[rootId])) {
|
|
continue;
|
|
}
|
|
text = xmlNodeGetContent(node);
|
|
if (ishttp(text)) {
|
|
xmlFree(text);
|
|
break;
|
|
}
|
|
xmlFree(text);
|
|
}
|
|
|
|
node = baseurl_nodes[rootId];
|
|
baseurl = xmlNodeGetContent(node);
|
|
root_url = (av_strcasecmp(baseurl, "")) ? baseurl : path;
|
|
if (node) {
|
|
xmlNodeSetContent(node, root_url);
|
|
updated = 1;
|
|
}
|
|
|
|
size = strlen(root_url);
|
|
isRootHttp = ishttp(root_url);
|
|
|
|
if (size > 0 && root_url[size - 1] != token) {
|
|
av_strlcat(root_url, "/", size + 2);
|
|
size += 2;
|
|
}
|
|
|
|
for (i = 0; i < n_baseurl_nodes; ++i) {
|
|
if (i == rootId) {
|
|
continue;
|
|
}
|
|
text = xmlNodeGetContent(baseurl_nodes[i]);
|
|
if (text && !av_strstart(text, "/", NULL)) {
|
|
memset(tmp_str, 0, strlen(tmp_str));
|
|
if (!ishttp(text) && isRootHttp) {
|
|
av_strlcpy(tmp_str, root_url, size + 1);
|
|
}
|
|
start = (text[0] == token);
|
|
if (start && av_stristr(tmp_str, text)) {
|
|
char *p = tmp_str;
|
|
if (!av_strncasecmp(tmp_str, "http://", 7)) {
|
|
p += 7;
|
|
} else if (!av_strncasecmp(tmp_str, "https://", 8)) {
|
|
p += 8;
|
|
}
|
|
p = strchr(p, '/');
|
|
memset(p + 1, 0, strlen(p));
|
|
}
|
|
av_strlcat(tmp_str, text + start, tmp_max_url_size);
|
|
xmlNodeSetContent(baseurl_nodes[i], tmp_str);
|
|
updated = 1;
|
|
xmlFree(text);
|
|
}
|
|
}
|
|
|
|
end:
|
|
if (tmp_max_url_size > *max_url_size) {
|
|
*max_url_size = tmp_max_url_size;
|
|
}
|
|
av_free(path);
|
|
av_free(tmp_str);
|
|
xmlFree(baseurl);
|
|
return updated;
|
|
|
|
}
|
|
|
|
static int parse_manifest_representation(AVFormatContext *s, const char *url,
|
|
xmlNodePtr node,
|
|
xmlNodePtr adaptionset_node,
|
|
xmlNodePtr mpd_baseurl_node,
|
|
xmlNodePtr period_baseurl_node,
|
|
xmlNodePtr period_segmenttemplate_node,
|
|
xmlNodePtr period_segmentlist_node,
|
|
xmlNodePtr fragment_template_node,
|
|
xmlNodePtr content_component_node,
|
|
xmlNodePtr adaptionset_baseurl_node,
|
|
xmlNodePtr adaptionset_segmentlist_node,
|
|
xmlNodePtr adaptionset_supplementalproperty_node)
|
|
{
|
|
int32_t ret = 0;
|
|
DASHContext *c = s->priv_data;
|
|
struct representation *rep = NULL;
|
|
struct fragment *seg = NULL;
|
|
xmlNodePtr representation_segmenttemplate_node = NULL;
|
|
xmlNodePtr representation_baseurl_node = NULL;
|
|
xmlNodePtr representation_segmentlist_node = NULL;
|
|
xmlNodePtr segmentlists_tab[3];
|
|
xmlNodePtr fragment_timeline_node = NULL;
|
|
xmlNodePtr fragment_templates_tab[5];
|
|
char *val = NULL;
|
|
xmlNodePtr baseurl_nodes[4];
|
|
xmlNodePtr representation_node = node;
|
|
char *rep_bandwidth_val;
|
|
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_VIDEO && type != AVMEDIA_TYPE_AUDIO &&
|
|
type != AVMEDIA_TYPE_SUBTITLE) {
|
|
av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url);
|
|
return 0;
|
|
}
|
|
|
|
// convert selected representation to our internal struct
|
|
rep = av_mallocz(sizeof(struct representation));
|
|
if (!rep)
|
|
return AVERROR(ENOMEM);
|
|
if (c->adaptionset_lang) {
|
|
rep->lang = av_strdup(c->adaptionset_lang);
|
|
if (!rep->lang) {
|
|
av_log(s, AV_LOG_ERROR, "alloc language memory failure\n");
|
|
av_freep(&rep);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
}
|
|
rep->parent = s;
|
|
representation_segmenttemplate_node = find_child_node_by_name(representation_node, "SegmentTemplate");
|
|
representation_baseurl_node = find_child_node_by_name(representation_node, "BaseURL");
|
|
representation_segmentlist_node = find_child_node_by_name(representation_node, "SegmentList");
|
|
rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
|
|
val = xmlGetProp(representation_node, "id");
|
|
if (val) {
|
|
rep->id = av_strdup(val);
|
|
xmlFree(val);
|
|
if (!rep->id)
|
|
goto enomem;
|
|
}
|
|
|
|
baseurl_nodes[0] = mpd_baseurl_node;
|
|
baseurl_nodes[1] = period_baseurl_node;
|
|
baseurl_nodes[2] = adaptionset_baseurl_node;
|
|
baseurl_nodes[3] = representation_baseurl_node;
|
|
|
|
ret = resolve_content_path(s, url, &c->max_url_size, baseurl_nodes, 4);
|
|
c->max_url_size = aligned(c->max_url_size
|
|
+ (rep->id ? strlen(rep->id) : 0)
|
|
+ (rep_bandwidth_val ? strlen(rep_bandwidth_val) : 0));
|
|
if (ret == AVERROR(ENOMEM) || ret == 0)
|
|
goto free;
|
|
if (representation_segmenttemplate_node || fragment_template_node || period_segmenttemplate_node) {
|
|
fragment_timeline_node = NULL;
|
|
fragment_templates_tab[0] = representation_segmenttemplate_node;
|
|
fragment_templates_tab[1] = adaptionset_segmentlist_node;
|
|
fragment_templates_tab[2] = fragment_template_node;
|
|
fragment_templates_tab[3] = period_segmenttemplate_node;
|
|
fragment_templates_tab[4] = period_segmentlist_node;
|
|
|
|
val = get_val_from_nodes_tab(fragment_templates_tab, 4, "initialization");
|
|
if (val) {
|
|
rep->init_section = av_mallocz(sizeof(struct fragment));
|
|
if (!rep->init_section) {
|
|
xmlFree(val);
|
|
goto enomem;
|
|
}
|
|
c->max_url_size = aligned(c->max_url_size + strlen(val));
|
|
rep->init_section->url = get_content_url(baseurl_nodes, 4,
|
|
c->max_url_size, rep->id,
|
|
rep_bandwidth_val, val);
|
|
xmlFree(val);
|
|
if (!rep->init_section->url)
|
|
goto enomem;
|
|
rep->init_section->size = -1;
|
|
}
|
|
val = get_val_from_nodes_tab(fragment_templates_tab, 4, "media");
|
|
if (val) {
|
|
c->max_url_size = aligned(c->max_url_size + strlen(val));
|
|
rep->url_template = get_content_url(baseurl_nodes, 4,
|
|
c->max_url_size, rep->id,
|
|
rep_bandwidth_val, val);
|
|
xmlFree(val);
|
|
}
|
|
val = get_val_from_nodes_tab(fragment_templates_tab, 4, "presentationTimeOffset");
|
|
if (val) {
|
|
rep->presentation_timeoffset = (int64_t) strtoll(val, NULL, 10);
|
|
av_log(s, AV_LOG_TRACE, "rep->presentation_timeoffset = [%"PRId64"]\n", rep->presentation_timeoffset);
|
|
xmlFree(val);
|
|
}
|
|
val = get_val_from_nodes_tab(fragment_templates_tab, 4, "duration");
|
|
if (val) {
|
|
rep->fragment_duration = (int64_t) strtoll(val, NULL, 10);
|
|
av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
|
|
xmlFree(val);
|
|
}
|
|
val = get_val_from_nodes_tab(fragment_templates_tab, 4, "timescale");
|
|
if (val) {
|
|
rep->fragment_timescale = (int64_t) strtoll(val, NULL, 10);
|
|
av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
|
|
xmlFree(val);
|
|
}
|
|
val = get_val_from_nodes_tab(fragment_templates_tab, 4, "startNumber");
|
|
if (val) {
|
|
rep->start_number = rep->first_seq_no = (int64_t) strtoll(val, NULL, 10);
|
|
av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
|
|
xmlFree(val);
|
|
}
|
|
if (adaptionset_supplementalproperty_node) {
|
|
char *scheme_id_uri = xmlGetProp(adaptionset_supplementalproperty_node, "schemeIdUri");
|
|
if (scheme_id_uri) {
|
|
int is_last_segment_number = !av_strcasecmp(scheme_id_uri, "http://dashif.org/guidelines/last-segment-number");
|
|
xmlFree(scheme_id_uri);
|
|
if (is_last_segment_number) {
|
|
val = xmlGetProp(adaptionset_supplementalproperty_node, "value");
|
|
if (!val) {
|
|
av_log(s, AV_LOG_ERROR, "Missing value attribute in adaptionset_supplementalproperty_node\n");
|
|
} else {
|
|
rep->last_seq_no = (int64_t)strtoll(val, NULL, 10) - 1;
|
|
xmlFree(val);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
|
|
|
|
if (!fragment_timeline_node)
|
|
fragment_timeline_node = find_child_node_by_name(fragment_template_node, "SegmentTimeline");
|
|
if (!fragment_timeline_node)
|
|
fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
|
|
if (!fragment_timeline_node)
|
|
fragment_timeline_node = find_child_node_by_name(period_segmentlist_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)
|
|
goto free;
|
|
fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
|
|
}
|
|
}
|
|
} else if (representation_baseurl_node && !representation_segmentlist_node) {
|
|
seg = av_mallocz(sizeof(struct fragment));
|
|
if (!seg)
|
|
goto enomem;
|
|
ret = av_dynarray_add_nofree(&rep->fragments, &rep->n_fragments, seg);
|
|
if (ret < 0) {
|
|
av_free(seg);
|
|
goto free;
|
|
}
|
|
seg->url = get_content_url(baseurl_nodes, 4, c->max_url_size,
|
|
rep->id, rep_bandwidth_val, NULL);
|
|
if (!seg->url)
|
|
goto enomem;
|
|
seg->size = -1;
|
|
} else if (representation_segmentlist_node) {
|
|
// TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html
|
|
// http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
|
|
xmlNodePtr fragmenturl_node = NULL;
|
|
segmentlists_tab[0] = representation_segmentlist_node;
|
|
segmentlists_tab[1] = adaptionset_segmentlist_node;
|
|
segmentlists_tab[2] = period_segmentlist_node;
|
|
|
|
val = get_val_from_nodes_tab(segmentlists_tab, 3, "duration");
|
|
if (val) {
|
|
rep->fragment_duration = (int64_t) strtoll(val, NULL, 10);
|
|
av_log(s, AV_LOG_TRACE, "rep->fragment_duration = [%"PRId64"]\n", rep->fragment_duration);
|
|
xmlFree(val);
|
|
}
|
|
val = get_val_from_nodes_tab(segmentlists_tab, 3, "timescale");
|
|
if (val) {
|
|
rep->fragment_timescale = (int64_t) strtoll(val, NULL, 10);
|
|
av_log(s, AV_LOG_TRACE, "rep->fragment_timescale = [%"PRId64"]\n", rep->fragment_timescale);
|
|
xmlFree(val);
|
|
}
|
|
val = get_val_from_nodes_tab(segmentlists_tab, 3, "startNumber");
|
|
if (val) {
|
|
rep->start_number = rep->first_seq_no = (int64_t) strtoll(val, NULL, 10);
|
|
av_log(s, AV_LOG_TRACE, "rep->first_seq_no = [%"PRId64"]\n", rep->first_seq_no);
|
|
xmlFree(val);
|
|
}
|
|
|
|
fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node);
|
|
while (fragmenturl_node) {
|
|
ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node,
|
|
baseurl_nodes, rep->id,
|
|
rep_bandwidth_val);
|
|
if (ret < 0)
|
|
goto free;
|
|
fragmenturl_node = xmlNextElementSibling(fragmenturl_node);
|
|
}
|
|
|
|
fragment_timeline_node = find_child_node_by_name(adaptionset_segmentlist_node, "SegmentTimeline");
|
|
if (!fragment_timeline_node)
|
|
fragment_timeline_node = find_child_node_by_name(period_segmentlist_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)
|
|
goto free;
|
|
fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node);
|
|
}
|
|
}
|
|
} else {
|
|
av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id '%s' \n",
|
|
rep->id ? rep->id : "");
|
|
goto free;
|
|
}
|
|
|
|
if (rep->fragment_duration > 0 && !rep->fragment_timescale)
|
|
rep->fragment_timescale = 1;
|
|
rep->bandwidth = rep_bandwidth_val ? atoi(rep_bandwidth_val) : 0;
|
|
rep->framerate = av_make_q(0, 0);
|
|
if (type == AVMEDIA_TYPE_VIDEO) {
|
|
char *rep_framerate_val = xmlGetProp(representation_node, "frameRate");
|
|
if (rep_framerate_val) {
|
|
ret = av_parse_video_rate(&rep->framerate, rep_framerate_val);
|
|
if (ret < 0)
|
|
av_log(s, AV_LOG_VERBOSE, "Ignoring invalid frame rate '%s'\n", rep_framerate_val);
|
|
xmlFree(rep_framerate_val);
|
|
}
|
|
}
|
|
|
|
switch (type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
ret = av_dynarray_add_nofree(&c->videos, &c->n_videos, rep);
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
ret = av_dynarray_add_nofree(&c->audios, &c->n_audios, rep);
|
|
break;
|
|
case AVMEDIA_TYPE_SUBTITLE:
|
|
ret = av_dynarray_add_nofree(&c->subtitles, &c->n_subtitles, rep);
|
|
break;
|
|
}
|
|
if (ret < 0)
|
|
goto free;
|
|
|
|
end:
|
|
if (rep_bandwidth_val)
|
|
xmlFree(rep_bandwidth_val);
|
|
|
|
return ret;
|
|
enomem:
|
|
ret = AVERROR(ENOMEM);
|
|
free:
|
|
free_representation(rep);
|
|
goto end;
|
|
}
|
|
|
|
static int parse_manifest_adaptationset_attr(AVFormatContext *s, xmlNodePtr adaptionset_node)
|
|
{
|
|
DASHContext *c = s->priv_data;
|
|
|
|
if (!adaptionset_node) {
|
|
av_log(s, AV_LOG_WARNING, "Cannot get AdaptionSet\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
c->adaptionset_lang = xmlGetProp(adaptionset_node, "lang");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
|
|
xmlNodePtr adaptionset_node,
|
|
xmlNodePtr mpd_baseurl_node,
|
|
xmlNodePtr period_baseurl_node,
|
|
xmlNodePtr period_segmenttemplate_node,
|
|
xmlNodePtr period_segmentlist_node)
|
|
{
|
|
int ret = 0;
|
|
DASHContext *c = s->priv_data;
|
|
xmlNodePtr fragment_template_node = NULL;
|
|
xmlNodePtr content_component_node = NULL;
|
|
xmlNodePtr adaptionset_baseurl_node = NULL;
|
|
xmlNodePtr adaptionset_segmentlist_node = NULL;
|
|
xmlNodePtr adaptionset_supplementalproperty_node = NULL;
|
|
xmlNodePtr node = NULL;
|
|
|
|
ret = parse_manifest_adaptationset_attr(s, adaptionset_node);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
node = xmlFirstElementChild(adaptionset_node);
|
|
while (node) {
|
|
if (!av_strcasecmp(node->name, "SegmentTemplate")) {
|
|
fragment_template_node = node;
|
|
} else if (!av_strcasecmp(node->name, "ContentComponent")) {
|
|
content_component_node = node;
|
|
} else if (!av_strcasecmp(node->name, "BaseURL")) {
|
|
adaptionset_baseurl_node = node;
|
|
} else if (!av_strcasecmp(node->name, "SegmentList")) {
|
|
adaptionset_segmentlist_node = node;
|
|
} else if (!av_strcasecmp(node->name, "SupplementalProperty")) {
|
|
adaptionset_supplementalproperty_node = node;
|
|
} else if (!av_strcasecmp(node->name, "Representation")) {
|
|
ret = parse_manifest_representation(s, url, node,
|
|
adaptionset_node,
|
|
mpd_baseurl_node,
|
|
period_baseurl_node,
|
|
period_segmenttemplate_node,
|
|
period_segmentlist_node,
|
|
fragment_template_node,
|
|
content_component_node,
|
|
adaptionset_baseurl_node,
|
|
adaptionset_segmentlist_node,
|
|
adaptionset_supplementalproperty_node);
|
|
if (ret < 0)
|
|
goto err;
|
|
}
|
|
node = xmlNextElementSibling(node);
|
|
}
|
|
|
|
err:
|
|
xmlFree(c->adaptionset_lang);
|
|
c->adaptionset_lang = NULL;
|
|
return ret;
|
|
}
|
|
|
|
static int parse_programinformation(AVFormatContext *s, xmlNodePtr node)
|
|
{
|
|
xmlChar *val = NULL;
|
|
|
|
node = xmlFirstElementChild(node);
|
|
while (node) {
|
|
if (!av_strcasecmp(node->name, "Title")) {
|
|
val = xmlNodeGetContent(node);
|
|
if (val) {
|
|
av_dict_set(&s->metadata, "Title", val, 0);
|
|
}
|
|
} else if (!av_strcasecmp(node->name, "Source")) {
|
|
val = xmlNodeGetContent(node);
|
|
if (val) {
|
|
av_dict_set(&s->metadata, "Source", val, 0);
|
|
}
|
|
} else if (!av_strcasecmp(node->name, "Copyright")) {
|
|
val = xmlNodeGetContent(node);
|
|
if (val) {
|
|
av_dict_set(&s->metadata, "Copyright", val, 0);
|
|
}
|
|
}
|
|
node = xmlNextElementSibling(node);
|
|
xmlFree(val);
|
|
val = NULL;
|
|
}
|
|
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;
|
|
AVBPrint buf;
|
|
AVDictionary *opts = NULL;
|
|
xmlDoc *doc = NULL;
|
|
xmlNodePtr root_element = NULL;
|
|
xmlNodePtr node = NULL;
|
|
xmlNodePtr period_node = NULL;
|
|
xmlNodePtr tmp_node = NULL;
|
|
xmlNodePtr mpd_baseurl_node = NULL;
|
|
xmlNodePtr period_baseurl_node = NULL;
|
|
xmlNodePtr period_segmenttemplate_node = NULL;
|
|
xmlNodePtr period_segmentlist_node = NULL;
|
|
xmlNodePtr adaptionset_node = NULL;
|
|
xmlAttrPtr attr = NULL;
|
|
char *val = NULL;
|
|
uint32_t period_duration_sec = 0;
|
|
uint32_t period_start_sec = 0;
|
|
|
|
if (!in) {
|
|
close_in = 1;
|
|
|
|
av_dict_copy(&opts, c->avio_opts, 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, (uint8_t**)&c->base_url) < 0)
|
|
c->base_url = av_strdup(url);
|
|
|
|
av_bprint_init(&buf, 0, INT_MAX); // xmlReadMemory uses integer bufsize
|
|
|
|
if ((ret = avio_read_to_bprint(in, &buf, SIZE_MAX)) < 0 ||
|
|
!avio_feof(in)) {
|
|
av_log(s, AV_LOG_ERROR, "Unable to read to manifest '%s'\n", url);
|
|
if (ret == 0)
|
|
ret = AVERROR_INVALIDDATA;
|
|
} else {
|
|
LIBXML_TEST_VERSION
|
|
|
|
doc = xmlReadMemory(buf.str, buf.len, c->base_url, NULL, 0);
|
|
root_element = xmlDocGetRootElement(doc);
|
|
node = root_element;
|
|
|
|
if (!node) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url);
|
|
goto cleanup;
|
|
}
|
|
|
|
if (node->type != XML_ELEMENT_NODE ||
|
|
av_strcasecmp(node->name, "MPD")) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type);
|
|
goto cleanup;
|
|
}
|
|
|
|
val = xmlGetProp(node, "type");
|
|
if (!val) {
|
|
av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url);
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto cleanup;
|
|
}
|
|
if (!av_strcasecmp(val, "dynamic"))
|
|
c->is_live = 1;
|
|
xmlFree(val);
|
|
|
|
attr = node->properties;
|
|
while (attr) {
|
|
val = xmlGetProp(node, attr->name);
|
|
|
|
if (!av_strcasecmp(attr->name, "availabilityStartTime")) {
|
|
c->availability_start_time = get_utc_date_time_insec(s, val);
|
|
av_log(s, AV_LOG_TRACE, "c->availability_start_time = [%"PRId64"]\n", c->availability_start_time);
|
|
} else if (!av_strcasecmp(attr->name, "availabilityEndTime")) {
|
|
c->availability_end_time = get_utc_date_time_insec(s, val);
|
|
av_log(s, AV_LOG_TRACE, "c->availability_end_time = [%"PRId64"]\n", c->availability_end_time);
|
|
} else if (!av_strcasecmp(attr->name, "publishTime")) {
|
|
c->publish_time = get_utc_date_time_insec(s, val);
|
|
av_log(s, AV_LOG_TRACE, "c->publish_time = [%"PRId64"]\n", c->publish_time);
|
|
} else if (!av_strcasecmp(attr->name, "minimumUpdatePeriod")) {
|
|
c->minimum_update_period = get_duration_insec(s, val);
|
|
av_log(s, AV_LOG_TRACE, "c->minimum_update_period = [%"PRId64"]\n", c->minimum_update_period);
|
|
} else if (!av_strcasecmp(attr->name, "timeShiftBufferDepth")) {
|
|
c->time_shift_buffer_depth = get_duration_insec(s, val);
|
|
av_log(s, AV_LOG_TRACE, "c->time_shift_buffer_depth = [%"PRId64"]\n", c->time_shift_buffer_depth);
|
|
} else if (!av_strcasecmp(attr->name, "minBufferTime")) {
|
|
c->min_buffer_time = get_duration_insec(s, val);
|
|
av_log(s, AV_LOG_TRACE, "c->min_buffer_time = [%"PRId64"]\n", c->min_buffer_time);
|
|
} else if (!av_strcasecmp(attr->name, "suggestedPresentationDelay")) {
|
|
c->suggested_presentation_delay = get_duration_insec(s, val);
|
|
av_log(s, AV_LOG_TRACE, "c->suggested_presentation_delay = [%"PRId64"]\n", c->suggested_presentation_delay);
|
|
} else if (!av_strcasecmp(attr->name, "mediaPresentationDuration")) {
|
|
c->media_presentation_duration = get_duration_insec(s, val);
|
|
av_log(s, AV_LOG_TRACE, "c->media_presentation_duration = [%"PRId64"]\n", c->media_presentation_duration);
|
|
}
|
|
attr = attr->next;
|
|
xmlFree(val);
|
|
}
|
|
|
|
tmp_node = find_child_node_by_name(node, "BaseURL");
|
|
if (tmp_node) {
|
|
mpd_baseurl_node = xmlCopyNode(tmp_node,1);
|
|
} else {
|
|
mpd_baseurl_node = xmlNewNode(NULL, "BaseURL");
|
|
}
|
|
|
|
// at now we can handle only one period, with the longest duration
|
|
node = xmlFirstElementChild(node);
|
|
while (node) {
|
|
if (!av_strcasecmp(node->name, "Period")) {
|
|
period_duration_sec = 0;
|
|
period_start_sec = 0;
|
|
attr = node->properties;
|
|
while (attr) {
|
|
val = xmlGetProp(node, attr->name);
|
|
if (!av_strcasecmp(attr->name, "duration")) {
|
|
period_duration_sec = get_duration_insec(s, val);
|
|
} else if (!av_strcasecmp(attr->name, "start")) {
|
|
period_start_sec = get_duration_insec(s, val);
|
|
}
|
|
attr = attr->next;
|
|
xmlFree(val);
|
|
}
|
|
if ((period_duration_sec) >= (c->period_duration)) {
|
|
period_node = node;
|
|
c->period_duration = period_duration_sec;
|
|
c->period_start = period_start_sec;
|
|
if (c->period_start > 0)
|
|
c->media_presentation_duration = c->period_duration;
|
|
}
|
|
} else if (!av_strcasecmp(node->name, "ProgramInformation")) {
|
|
parse_programinformation(s, node);
|
|
}
|
|
node = xmlNextElementSibling(node);
|
|
}
|
|
if (!period_node) {
|
|
av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url);
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto cleanup;
|
|
}
|
|
|
|
adaptionset_node = xmlFirstElementChild(period_node);
|
|
while (adaptionset_node) {
|
|
if (!av_strcasecmp(adaptionset_node->name, "BaseURL")) {
|
|
period_baseurl_node = adaptionset_node;
|
|
} else if (!av_strcasecmp(adaptionset_node->name, "SegmentTemplate")) {
|
|
period_segmenttemplate_node = adaptionset_node;
|
|
} else if (!av_strcasecmp(adaptionset_node->name, "SegmentList")) {
|
|
period_segmentlist_node = adaptionset_node;
|
|
} else if (!av_strcasecmp(adaptionset_node->name, "AdaptationSet")) {
|
|
parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node, period_segmenttemplate_node, period_segmentlist_node);
|
|
}
|
|
adaptionset_node = xmlNextElementSibling(adaptionset_node);
|
|
}
|
|
cleanup:
|
|
/*free the document */
|
|
xmlFreeDoc(doc);
|
|
xmlCleanupParser();
|
|
xmlFreeNode(mpd_baseurl_node);
|
|
}
|
|
|
|
av_bprint_finalize(&buf, NULL);
|
|
if (close_in) {
|
|
avio_close(in);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
|
|
{
|
|
DASHContext *c = s->priv_data;
|
|
int64_t num = 0;
|
|
int64_t start_time_offset = 0;
|
|
|
|
if (c->is_live) {
|
|
if (pls->n_fragments) {
|
|
av_log(s, AV_LOG_TRACE, "in n_fragments mode\n");
|
|
num = pls->first_seq_no;
|
|
} else if (pls->n_timelines) {
|
|
av_log(s, AV_LOG_TRACE, "in n_timelines mode\n");
|
|
start_time_offset = get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - 60 * pls->fragment_timescale; // 60 seconds before end
|
|
num = calc_next_seg_no_from_timelines(pls, start_time_offset);
|
|
if (num == -1)
|
|
num = pls->first_seq_no;
|
|
else
|
|
num += pls->first_seq_no;
|
|
} else if (pls->fragment_duration){
|
|
av_log(s, AV_LOG_TRACE, "in fragment_duration mode fragment_timescale = %"PRId64", presentation_timeoffset = %"PRId64"\n", pls->fragment_timescale, pls->presentation_timeoffset);
|
|
if (pls->presentation_timeoffset) {
|
|
num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) * pls->fragment_timescale)-pls->presentation_timeoffset) / pls->fragment_duration - c->min_buffer_time;
|
|
} else if (c->publish_time > 0 && !c->availability_start_time) {
|
|
if (c->min_buffer_time) {
|
|
num = pls->first_seq_no + (((c->publish_time + pls->fragment_duration) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration - c->min_buffer_time;
|
|
} else {
|
|
num = pls->first_seq_no + (((c->publish_time - c->time_shift_buffer_depth + pls->fragment_duration) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
|
|
}
|
|
} else {
|
|
num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration;
|
|
}
|
|
}
|
|
} else {
|
|
num = pls->first_seq_no;
|
|
}
|
|
return num;
|
|
}
|
|
|
|
static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls)
|
|
{
|
|
DASHContext *c = s->priv_data;
|
|
int64_t num = 0;
|
|
|
|
if (c->is_live && pls->fragment_duration) {
|
|
av_log(s, AV_LOG_TRACE, "in live mode\n");
|
|
num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->time_shift_buffer_depth) * pls->fragment_timescale) / pls->fragment_duration;
|
|
} else {
|
|
num = pls->first_seq_no;
|
|
}
|
|
return num;
|
|
}
|
|
|
|
static int64_t calc_max_seg_no(struct representation *pls, DASHContext *c)
|
|
{
|
|
int64_t num = 0;
|
|
|
|
if (pls->n_fragments) {
|
|
num = pls->first_seq_no + pls->n_fragments - 1;
|
|
} else if (pls->n_timelines) {
|
|
int i = 0;
|
|
num = pls->first_seq_no + pls->n_timelines - 1;
|
|
for (i = 0; i < pls->n_timelines; i++) {
|
|
if (pls->timelines[i]->repeat == -1) {
|
|
int length_of_each_segment = pls->timelines[i]->duration / pls->fragment_timescale;
|
|
num = c->period_duration / length_of_each_segment;
|
|
} else {
|
|
num += pls->timelines[i]->repeat;
|
|
}
|
|
}
|
|
} else if (c->is_live && pls->fragment_duration) {
|
|
num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time)) * pls->fragment_timescale) / pls->fragment_duration;
|
|
} else if (pls->fragment_duration) {
|
|
num = pls->first_seq_no + av_rescale_rnd(1, c->media_presentation_duration * pls->fragment_timescale, pls->fragment_duration, AV_ROUND_UP);
|
|
}
|
|
|
|
return num;
|
|
}
|
|
|
|
static void move_timelines(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
|
|
{
|
|
if (rep_dest && rep_src ) {
|
|
free_timelines_list(rep_dest);
|
|
rep_dest->timelines = rep_src->timelines;
|
|
rep_dest->n_timelines = rep_src->n_timelines;
|
|
rep_dest->first_seq_no = rep_src->first_seq_no;
|
|
rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
|
|
rep_src->timelines = NULL;
|
|
rep_src->n_timelines = 0;
|
|
rep_dest->cur_seq_no = rep_src->cur_seq_no;
|
|
}
|
|
}
|
|
|
|
static void move_segments(struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
|
|
{
|
|
if (rep_dest && rep_src ) {
|
|
free_fragment_list(rep_dest);
|
|
if (rep_src->start_number > (rep_dest->start_number + rep_dest->n_fragments))
|
|
rep_dest->cur_seq_no = 0;
|
|
else
|
|
rep_dest->cur_seq_no += rep_src->start_number - rep_dest->start_number;
|
|
rep_dest->fragments = rep_src->fragments;
|
|
rep_dest->n_fragments = rep_src->n_fragments;
|
|
rep_dest->parent = rep_src->parent;
|
|
rep_dest->last_seq_no = calc_max_seg_no(rep_dest, c);
|
|
rep_src->fragments = NULL;
|
|
rep_src->n_fragments = 0;
|
|
}
|
|
}
|
|
|
|
|
|
static int refresh_manifest(AVFormatContext *s)
|
|
{
|
|
int ret = 0, i;
|
|
DASHContext *c = s->priv_data;
|
|
// save current context
|
|
int n_videos = c->n_videos;
|
|
struct representation **videos = c->videos;
|
|
int n_audios = c->n_audios;
|
|
struct representation **audios = c->audios;
|
|
int n_subtitles = c->n_subtitles;
|
|
struct representation **subtitles = c->subtitles;
|
|
char *base_url = c->base_url;
|
|
|
|
c->base_url = NULL;
|
|
c->n_videos = 0;
|
|
c->videos = NULL;
|
|
c->n_audios = 0;
|
|
c->audios = NULL;
|
|
c->n_subtitles = 0;
|
|
c->subtitles = NULL;
|
|
ret = parse_manifest(s, s->url, NULL);
|
|
if (ret)
|
|
goto finish;
|
|
|
|
if (c->n_videos != n_videos) {
|
|
av_log(c, AV_LOG_ERROR,
|
|
"new manifest has mismatched no. of video representations, %d -> %d\n",
|
|
n_videos, c->n_videos);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (c->n_audios != n_audios) {
|
|
av_log(c, AV_LOG_ERROR,
|
|
"new manifest has mismatched no. of audio representations, %d -> %d\n",
|
|
n_audios, c->n_audios);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (c->n_subtitles != n_subtitles) {
|
|
av_log(c, AV_LOG_ERROR,
|
|
"new manifest has mismatched no. of subtitles representations, %d -> %d\n",
|
|
n_subtitles, c->n_subtitles);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
for (i = 0; i < n_videos; i++) {
|
|
struct representation *cur_video = videos[i];
|
|
struct representation *ccur_video = c->videos[i];
|
|
if (cur_video->timelines) {
|
|
// calc current time
|
|
int64_t currentTime = get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / cur_video->fragment_timescale;
|
|
// update segments
|
|
ccur_video->cur_seq_no = calc_next_seg_no_from_timelines(ccur_video, currentTime * cur_video->fragment_timescale - 1);
|
|
if (ccur_video->cur_seq_no >= 0) {
|
|
move_timelines(ccur_video, cur_video, c);
|
|
}
|
|
}
|
|
if (cur_video->fragments) {
|
|
move_segments(ccur_video, cur_video, c);
|
|
}
|
|
}
|
|
for (i = 0; i < n_audios; i++) {
|
|
struct representation *cur_audio = audios[i];
|
|
struct representation *ccur_audio = c->audios[i];
|
|
if (cur_audio->timelines) {
|
|
// calc current time
|
|
int64_t currentTime = get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / cur_audio->fragment_timescale;
|
|
// update segments
|
|
ccur_audio->cur_seq_no = calc_next_seg_no_from_timelines(ccur_audio, currentTime * cur_audio->fragment_timescale - 1);
|
|
if (ccur_audio->cur_seq_no >= 0) {
|
|
move_timelines(ccur_audio, cur_audio, c);
|
|
}
|
|
}
|
|
if (cur_audio->fragments) {
|
|
move_segments(ccur_audio, cur_audio, c);
|
|
}
|
|
}
|
|
|
|
finish:
|
|
// restore context
|
|
if (c->base_url)
|
|
av_free(base_url);
|
|
else
|
|
c->base_url = base_url;
|
|
|
|
if (c->subtitles)
|
|
free_subtitle_list(c);
|
|
if (c->audios)
|
|
free_audio_list(c);
|
|
if (c->videos)
|
|
free_video_list(c);
|
|
|
|
c->n_subtitles = n_subtitles;
|
|
c->subtitles = subtitles;
|
|
c->n_audios = n_audios;
|
|
c->audios = audios;
|
|
c->n_videos = n_videos;
|
|
c->videos = videos;
|
|
return ret;
|
|
}
|
|
|
|
static struct fragment *get_current_fragment(struct representation *pls)
|
|
{
|
|
int64_t min_seq_no = 0;
|
|
int64_t max_seq_no = 0;
|
|
struct fragment *seg = NULL;
|
|
struct fragment *seg_ptr = NULL;
|
|
DASHContext *c = pls->parent->priv_data;
|
|
|
|
while (( !ff_check_interrupt(c->interrupt_callback)&& pls->n_fragments > 0)) {
|
|
if (pls->cur_seq_no < pls->n_fragments) {
|
|
seg_ptr = pls->fragments[pls->cur_seq_no];
|
|
seg = av_mallocz(sizeof(struct fragment));
|
|
if (!seg) {
|
|
return NULL;
|
|
}
|
|
seg->url = av_strdup(seg_ptr->url);
|
|
if (!seg->url) {
|
|
av_free(seg);
|
|
return NULL;
|
|
}
|
|
seg->size = seg_ptr->size;
|
|
seg->url_offset = seg_ptr->url_offset;
|
|
return seg;
|
|
} else if (c->is_live) {
|
|
refresh_manifest(pls->parent);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
if (c->is_live) {
|
|
min_seq_no = calc_min_seg_no(pls->parent, pls);
|
|
max_seq_no = calc_max_seg_no(pls, c);
|
|
|
|
if (pls->timelines || pls->fragments) {
|
|
refresh_manifest(pls->parent);
|
|
}
|
|
if (pls->cur_seq_no <= min_seq_no) {
|
|
av_log(pls->parent, AV_LOG_VERBOSE, "old fragment: cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"]\n", (int64_t)pls->cur_seq_no, min_seq_no, max_seq_no);
|
|
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"]\n", min_seq_no, max_seq_no);
|
|
}
|
|
seg = av_mallocz(sizeof(struct fragment));
|
|
if (!seg) {
|
|
return NULL;
|
|
}
|
|
} else if (pls->cur_seq_no <= pls->last_seq_no) {
|
|
seg = av_mallocz(sizeof(struct fragment));
|
|
if (!seg) {
|
|
return NULL;
|
|
}
|
|
}
|
|
if (seg) {
|
|
char *tmpfilename;
|
|
if (!pls->url_template) {
|
|
av_log(pls->parent, AV_LOG_ERROR, "Cannot get fragment, missing template URL\n");
|
|
av_free(seg);
|
|
return NULL;
|
|
}
|
|
tmpfilename = av_mallocz(c->max_url_size);
|
|
if (!tmpfilename) {
|
|
av_free(seg);
|
|
return NULL;
|
|
}
|
|
ff_dash_fill_tmpl_params(tmpfilename, c->max_url_size, pls->url_template, 0, pls->cur_seq_no, 0, get_segment_start_time_based_on_timeline(pls, pls->cur_seq_no));
|
|
seg->url = av_strireplace(pls->url_template, pls->url_template, tmpfilename);
|
|
if (!seg->url) {
|
|
av_log(pls->parent, AV_LOG_WARNING, "Unable to resolve template url '%s', try to use origin template\n", pls->url_template);
|
|
seg->url = av_strdup(pls->url_template);
|
|
if (!seg->url) {
|
|
av_log(pls->parent, AV_LOG_ERROR, "Cannot resolve template url '%s'\n", pls->url_template);
|
|
av_free(tmpfilename);
|
|
av_free(seg);
|
|
return NULL;
|
|
}
|
|
}
|
|
av_free(tmpfilename);
|
|
seg->size = -1;
|
|
}
|
|
|
|
return seg;
|
|
}
|
|
|
|
static int read_from_url(struct representation *pls, struct fragment *seg,
|
|
uint8_t *buf, int buf_size)
|
|
{
|
|
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);
|
|
|
|
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 = NULL;
|
|
int ret = 0;
|
|
|
|
url = av_mallocz(c->max_url_size);
|
|
if (!url) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto cleanup;
|
|
}
|
|
|
|
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, c->max_url_size, c->base_url, seg->url);
|
|
av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64"\n",
|
|
url, seg->url_offset);
|
|
ret = open_url(pls->parent, &pls->input, url, &c->avio_opts, opts, NULL);
|
|
|
|
cleanup:
|
|
av_free(url);
|
|
av_dict_free(&opts);
|
|
pls->cur_seg_offset = 0;
|
|
pls->cur_seg_size = seg->size;
|
|
return ret;
|
|
}
|
|
|
|
static int update_init_section(struct representation *pls)
|
|
{
|
|
static const int max_init_section_size = 1024 * 1024;
|
|
DASHContext *c = pls->parent->priv_data;
|
|
int64_t sec_size;
|
|
int64_t urlsize;
|
|
int ret;
|
|
|
|
if (!pls->init_section || pls->init_sec_buf)
|
|
return 0;
|
|
|
|
ret = open_input(c, pls, pls->init_section);
|
|
if (ret < 0) {
|
|
av_log(pls->parent, AV_LOG_WARNING,
|
|
"Failed to open an initialization section\n");
|
|
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);
|
|
ff_format_io_close(pls->parent, &pls->input);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
pls->init_sec_data_len = ret;
|
|
pls->init_sec_buf_read_offset = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int64_t seek_data(void *opaque, int64_t offset, int whence)
|
|
{
|
|
struct representation *v = opaque;
|
|
if (v->n_fragments && !v->init_sec_data_len) {
|
|
return avio_seek(v->input, offset, whence);
|
|
}
|
|
|
|
return AVERROR(ENOSYS);
|
|
}
|
|
|
|
static int read_data(void *opaque, uint8_t *buf, int buf_size)
|
|
{
|
|
int ret = 0;
|
|
struct representation *v = opaque;
|
|
DASHContext *c = v->parent->priv_data;
|
|
|
|
restart:
|
|
if (!v->input) {
|
|
free_fragment(&v->cur_seg);
|
|
v->cur_seg = get_current_fragment(v);
|
|
if (!v->cur_seg) {
|
|
ret = AVERROR_EOF;
|
|
goto end;
|
|
}
|
|
|
|
/* load/update Media Initialization Section, if any */
|
|
ret = update_init_section(v);
|
|
if (ret)
|
|
goto end;
|
|
|
|
ret = open_input(c, v, v->cur_seg);
|
|
if (ret < 0) {
|
|
if (ff_check_interrupt(c->interrupt_callback)) {
|
|
ret = AVERROR_EXIT;
|
|
goto end;
|
|
}
|
|
av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist\n");
|
|
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);
|
|
if (ret > 0)
|
|
goto end;
|
|
|
|
if (c->is_live || v->cur_seq_no < v->last_seq_no) {
|
|
if (!v->is_restart_needed)
|
|
v->cur_seq_no++;
|
|
v->is_restart_needed = 1;
|
|
}
|
|
|
|
end:
|
|
return ret;
|
|
}
|
|
|
|
static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url,
|
|
int flags, AVDictionary **opts)
|
|
{
|
|
av_log(s, AV_LOG_ERROR,
|
|
"A DASH playlist item '%s' referred to an external file '%s'. "
|
|
"Opening this file was forbidden for security reasons\n",
|
|
s->url, url);
|
|
return AVERROR(EPERM);
|
|
}
|
|
|
|
static void close_demux_for_component(struct representation *pls)
|
|
{
|
|
/* note: the internal buffer could have changed */
|
|
av_freep(&pls->pb.pub.buffer);
|
|
memset(&pls->pb, 0x00, sizeof(pls->pb));
|
|
pls->ctx->pb = NULL;
|
|
avformat_close_input(&pls->ctx);
|
|
}
|
|
|
|
static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls)
|
|
{
|
|
DASHContext *c = s->priv_data;
|
|
const AVInputFormat *in_fmt = NULL;
|
|
AVDictionary *in_fmt_opts = NULL;
|
|
uint8_t *avio_ctx_buffer = NULL;
|
|
int ret = 0, i;
|
|
|
|
if (pls->ctx) {
|
|
close_demux_for_component(pls);
|
|
}
|
|
|
|
if (ff_check_interrupt(&s->interrupt_callback)) {
|
|
ret = AVERROR_EXIT;
|
|
goto fail;
|
|
}
|
|
|
|
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;
|
|
}
|
|
ffio_init_context(&pls->pb, avio_ctx_buffer, INITIAL_BUFFER_SIZE, 0,
|
|
pls, read_data, NULL, c->is_live ? NULL : seek_data);
|
|
pls->pb.pub.seekable = 0;
|
|
|
|
if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
|
|
goto fail;
|
|
|
|
pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
|
|
pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 * 4;
|
|
pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ? s->max_analyze_duration : 4 * AV_TIME_BASE;
|
|
pls->ctx->interrupt_callback = s->interrupt_callback;
|
|
ret = av_probe_input_buffer(&pls->pb.pub, &in_fmt, "", NULL, 0, 0);
|
|
if (ret < 0) {
|
|
av_log(s, AV_LOG_ERROR, "Error when loading first fragment of playlist\n");
|
|
avformat_free_context(pls->ctx);
|
|
pls->ctx = NULL;
|
|
goto fail;
|
|
}
|
|
|
|
pls->ctx->pb = &pls->pb.pub;
|
|
pls->ctx->io_open = nested_io_open;
|
|
|
|
if (c->cenc_decryption_key)
|
|
av_dict_set(&in_fmt_opts, "decryption_key", c->cenc_decryption_key, 0);
|
|
|
|
// 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) {
|
|
#if FF_API_R_FRAME_RATE
|
|
if (pls->framerate.den) {
|
|
for (i = 0; i < pls->ctx->nb_streams; i++)
|
|
pls->ctx->streams[i]->r_frame_rate = pls->framerate;
|
|
}
|
|
#endif
|
|
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);
|
|
|
|
if (!pls->last_seq_no) {
|
|
pls->last_seq_no = calc_max_seg_no(pls, s->priv_data);
|
|
}
|
|
|
|
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, ist->codecpar);
|
|
avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
|
|
|
|
// copy disposition
|
|
st->disposition = ist->disposition;
|
|
|
|
// copy side data
|
|
for (int i = 0; i < ist->nb_side_data; i++) {
|
|
const AVPacketSideData *sd_src = &ist->side_data[i];
|
|
uint8_t *dst_data;
|
|
|
|
dst_data = av_stream_new_side_data(st, sd_src->type, sd_src->size);
|
|
if (!dst_data)
|
|
return AVERROR(ENOMEM);
|
|
memcpy(dst_data, sd_src->data, sd_src->size);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
fail:
|
|
return ret;
|
|
}
|
|
|
|
static int is_common_init_section_exist(struct representation **pls, int n_pls)
|
|
{
|
|
struct fragment *first_init_section = pls[0]->init_section;
|
|
char *url =NULL;
|
|
int64_t url_offset = -1;
|
|
int64_t size = -1;
|
|
int i = 0;
|
|
|
|
if (first_init_section == NULL || n_pls == 0)
|
|
return 0;
|
|
|
|
url = first_init_section->url;
|
|
url_offset = first_init_section->url_offset;
|
|
size = pls[0]->init_section->size;
|
|
for (i=0;i<n_pls;i++) {
|
|
if (!pls[i]->init_section)
|
|
continue;
|
|
|
|
if (av_strcasecmp(pls[i]->init_section->url, url) ||
|
|
pls[i]->init_section->url_offset != url_offset ||
|
|
pls[i]->init_section->size != size) {
|
|
return 0;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int copy_init_section(struct representation *rep_dest, struct representation *rep_src)
|
|
{
|
|
rep_dest->init_sec_buf = av_mallocz(rep_src->init_sec_buf_size);
|
|
if (!rep_dest->init_sec_buf) {
|
|
av_log(rep_dest->ctx, AV_LOG_WARNING, "Cannot alloc memory for init_sec_buf\n");
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
memcpy(rep_dest->init_sec_buf, rep_src->init_sec_buf, rep_src->init_sec_data_len);
|
|
rep_dest->init_sec_buf_size = rep_src->init_sec_buf_size;
|
|
rep_dest->init_sec_data_len = rep_src->init_sec_data_len;
|
|
rep_dest->cur_timestamp = rep_src->cur_timestamp;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void move_metadata(AVStream *st, const char *key, char **value)
|
|
{
|
|
if (*value) {
|
|
av_dict_set(&st->metadata, key, *value, AV_DICT_DONT_STRDUP_VAL);
|
|
*value = NULL;
|
|
}
|
|
}
|
|
|
|
static int dash_read_header(AVFormatContext *s)
|
|
{
|
|
DASHContext *c = s->priv_data;
|
|
struct representation *rep;
|
|
AVProgram *program;
|
|
int ret = 0;
|
|
int stream_index = 0;
|
|
int i;
|
|
|
|
c->interrupt_callback = &s->interrupt_callback;
|
|
|
|
if ((ret = ffio_copy_url_options(s->pb, &c->avio_opts)) < 0)
|
|
return ret;
|
|
|
|
if ((ret = parse_manifest(s, s->url, s->pb)) < 0)
|
|
return ret;
|
|
|
|
/* If this isn't a live stream, fill the total duration of the
|
|
* stream. */
|
|
if (!c->is_live) {
|
|
s->duration = (int64_t) c->media_presentation_duration * AV_TIME_BASE;
|
|
} else {
|
|
av_dict_set(&c->avio_opts, "seekable", "0", 0);
|
|
}
|
|
|
|
if(c->n_videos)
|
|
c->is_init_section_common_video = is_common_init_section_exist(c->videos, c->n_videos);
|
|
|
|
/* Open the demuxer for video and audio components if available */
|
|
for (i = 0; i < c->n_videos; i++) {
|
|
rep = c->videos[i];
|
|
if (i > 0 && c->is_init_section_common_video) {
|
|
ret = copy_init_section(rep, c->videos[0]);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
ret = open_demux_for_component(s, rep);
|
|
|
|
if (ret)
|
|
return ret;
|
|
rep->stream_index = stream_index;
|
|
++stream_index;
|
|
}
|
|
|
|
if(c->n_audios)
|
|
c->is_init_section_common_audio = is_common_init_section_exist(c->audios, c->n_audios);
|
|
|
|
for (i = 0; i < c->n_audios; i++) {
|
|
rep = c->audios[i];
|
|
if (i > 0 && c->is_init_section_common_audio) {
|
|
ret = copy_init_section(rep, c->audios[0]);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
ret = open_demux_for_component(s, rep);
|
|
|
|
if (ret)
|
|
return ret;
|
|
rep->stream_index = stream_index;
|
|
++stream_index;
|
|
}
|
|
|
|
if (c->n_subtitles)
|
|
c->is_init_section_common_subtitle = is_common_init_section_exist(c->subtitles, c->n_subtitles);
|
|
|
|
for (i = 0; i < c->n_subtitles; i++) {
|
|
rep = c->subtitles[i];
|
|
if (i > 0 && c->is_init_section_common_subtitle) {
|
|
ret = copy_init_section(rep, c->subtitles[0]);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
ret = open_demux_for_component(s, rep);
|
|
|
|
if (ret)
|
|
return ret;
|
|
rep->stream_index = stream_index;
|
|
++stream_index;
|
|
}
|
|
|
|
if (!stream_index)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
/* Create a program */
|
|
program = av_new_program(s, 0);
|
|
if (!program)
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (i = 0; i < c->n_videos; i++) {
|
|
rep = c->videos[i];
|
|
av_program_add_stream_index(s, 0, rep->stream_index);
|
|
rep->assoc_stream = s->streams[rep->stream_index];
|
|
if (rep->bandwidth > 0)
|
|
av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
|
|
move_metadata(rep->assoc_stream, "id", &rep->id);
|
|
}
|
|
for (i = 0; i < c->n_audios; i++) {
|
|
rep = c->audios[i];
|
|
av_program_add_stream_index(s, 0, rep->stream_index);
|
|
rep->assoc_stream = s->streams[rep->stream_index];
|
|
if (rep->bandwidth > 0)
|
|
av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
|
|
move_metadata(rep->assoc_stream, "id", &rep->id);
|
|
move_metadata(rep->assoc_stream, "language", &rep->lang);
|
|
}
|
|
for (i = 0; i < c->n_subtitles; i++) {
|
|
rep = c->subtitles[i];
|
|
av_program_add_stream_index(s, 0, rep->stream_index);
|
|
rep->assoc_stream = s->streams[rep->stream_index];
|
|
move_metadata(rep->assoc_stream, "id", &rep->id);
|
|
move_metadata(rep->assoc_stream, "language", &rep->lang);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void recheck_discard_flags(AVFormatContext *s, struct representation **p, int n)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < n; i++) {
|
|
struct representation *pls = p[i];
|
|
int needed = !pls->assoc_stream || pls->assoc_stream->discard < AVDISCARD_ALL;
|
|
|
|
if (needed && !pls->ctx) {
|
|
pls->cur_seg_offset = 0;
|
|
pls->init_sec_buf_read_offset = 0;
|
|
/* Catch up */
|
|
for (j = 0; j < n; j++) {
|
|
pls->cur_seq_no = FFMAX(pls->cur_seq_no, p[j]->cur_seq_no);
|
|
}
|
|
reopen_demux_for_component(s, pls);
|
|
av_log(s, AV_LOG_INFO, "Now receiving stream_index %d\n", pls->stream_index);
|
|
} else if (!needed && pls->ctx) {
|
|
close_demux_for_component(pls);
|
|
ff_format_io_close(pls->parent, &pls->input);
|
|
av_log(s, AV_LOG_INFO, "No longer receiving stream_index %d\n", pls->stream_index);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
DASHContext *c = s->priv_data;
|
|
int ret = 0, i;
|
|
int64_t mints = 0;
|
|
struct representation *cur = NULL;
|
|
struct representation *rep = NULL;
|
|
|
|
recheck_discard_flags(s, c->videos, c->n_videos);
|
|
recheck_discard_flags(s, c->audios, c->n_audios);
|
|
recheck_discard_flags(s, c->subtitles, c->n_subtitles);
|
|
|
|
for (i = 0; i < c->n_videos; i++) {
|
|
rep = c->videos[i];
|
|
if (!rep->ctx)
|
|
continue;
|
|
if (!cur || rep->cur_timestamp < mints) {
|
|
cur = rep;
|
|
mints = rep->cur_timestamp;
|
|
}
|
|
}
|
|
for (i = 0; i < c->n_audios; i++) {
|
|
rep = c->audios[i];
|
|
if (!rep->ctx)
|
|
continue;
|
|
if (!cur || rep->cur_timestamp < mints) {
|
|
cur = rep;
|
|
mints = rep->cur_timestamp;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < c->n_subtitles; i++) {
|
|
rep = c->subtitles[i];
|
|
if (!rep->ctx)
|
|
continue;
|
|
if (!cur || rep->cur_timestamp < mints) {
|
|
cur = rep;
|
|
mints = rep->cur_timestamp;
|
|
}
|
|
}
|
|
|
|
if (!cur) {
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
|
|
ret = av_read_frame(cur->ctx, pkt);
|
|
if (ret >= 0) {
|
|
/* If we got a packet, return it */
|
|
cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den);
|
|
pkt->stream_index = cur->stream_index;
|
|
return 0;
|
|
}
|
|
if (cur->is_restart_needed) {
|
|
cur->cur_seg_offset = 0;
|
|
cur->init_sec_buf_read_offset = 0;
|
|
ff_format_io_close(cur->parent, &cur->input);
|
|
ret = reopen_demux_for_component(s, cur);
|
|
cur->is_restart_needed = 0;
|
|
}
|
|
}
|
|
return AVERROR_EOF;
|
|
}
|
|
|
|
static int dash_close(AVFormatContext *s)
|
|
{
|
|
DASHContext *c = s->priv_data;
|
|
free_audio_list(c);
|
|
free_video_list(c);
|
|
free_subtitle_list(c);
|
|
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 dry_run)
|
|
{
|
|
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] %s\n",
|
|
seek_pos_msec, dry_run ? " (dry)" : "");
|
|
|
|
// single fragment mode
|
|
if (pls->n_fragments == 1) {
|
|
pls->cur_timestamp = 0;
|
|
pls->cur_seg_offset = 0;
|
|
if (dry_run)
|
|
return 0;
|
|
ff_read_frame_flush(pls->ctx);
|
|
return av_seek_frame(pls->ctx, -1, seek_pos_msec * 1000, flags);
|
|
}
|
|
|
|
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"].\n",
|
|
(int)pls->n_timelines, (int64_t)pls->last_seq_no);
|
|
for (i = 0; i < pls->n_timelines; i++) {
|
|
if (pls->timelines[i]->starttime > 0) {
|
|
duration = pls->timelines[i]->starttime;
|
|
}
|
|
duration += pls->timelines[i]->duration;
|
|
if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
|
|
goto set_seq_num;
|
|
}
|
|
for (j = 0; j < pls->timelines[i]->repeat; j++) {
|
|
duration += pls->timelines[i]->duration;
|
|
num++;
|
|
if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) {
|
|
goto set_seq_num;
|
|
}
|
|
}
|
|
num++;
|
|
}
|
|
|
|
set_seq_num:
|
|
pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num;
|
|
av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"].\n",
|
|
(int64_t)pls->cur_seq_no);
|
|
} 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 timeline or 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 = dry_run ? 0 : 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, i;
|
|
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);
|
|
|
|
/* Seek in discarded streams with dry_run=1 to avoid reopening them */
|
|
for (i = 0; i < c->n_videos; i++) {
|
|
if (!ret)
|
|
ret = dash_seek(s, c->videos[i], seek_pos_msec, flags, !c->videos[i]->ctx);
|
|
}
|
|
for (i = 0; i < c->n_audios; i++) {
|
|
if (!ret)
|
|
ret = dash_seek(s, c->audios[i], seek_pos_msec, flags, !c->audios[i]->ctx);
|
|
}
|
|
for (i = 0; i < c->n_subtitles; i++) {
|
|
if (!ret)
|
|
ret = dash_seek(s, c->subtitles[i], seek_pos_msec, flags, !c->subtitles[i]->ctx);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int dash_probe(const 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") ||
|
|
av_stristr(p->buf, "3GPP:PSS:profile:DASH1")) {
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
if (av_stristr(p->buf, "dash:profile")) {
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(DASHContext, x)
|
|
#define FLAGS AV_OPT_FLAG_DECODING_PARAM
|
|
static const AVOption dash_options[] = {
|
|
{"allowed_extensions", "List of file extensions that dash is allowed to access",
|
|
OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
|
|
{.str = "aac,m4a,m4s,m4v,mov,mp4,webm,ts"},
|
|
INT_MIN, INT_MAX, FLAGS},
|
|
{ "cenc_decryption_key", "Media decryption key (hex)", OFFSET(cenc_decryption_key), AV_OPT_TYPE_STRING, {.str = NULL}, INT_MIN, INT_MAX, .flags = FLAGS },
|
|
{NULL}
|
|
};
|
|
|
|
static const AVClass dash_class = {
|
|
.class_name = "dash",
|
|
.item_name = av_default_item_name,
|
|
.option = dash_options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
const 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),
|
|
.flags_internal = FF_FMT_INIT_CLEANUP,
|
|
.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,
|
|
};
|