2017-03-30 18:46 GMT+08:00 wm4 <nfx...@googlemail.com>:
> On Thu, 30 Mar 2017 08:34:18 +0800
> Steven Liu <l...@chinaffmpeg.org> wrote:
>
> > v2 fixed:
> > 1. from autodetect to disabled
> > 2. from camelCase code style to ffmpeg code style
> > 3. from RepType to AVMediaType
> > 4. fix variable typo
> > 5. change time value from uint32_t to uint64_t
> > 6. removed be used once API
> > 7. change 'time(NULL)`, except it is not 2038-safe.' to av_gettime and
> av_timegm
> > 8. merge complex free operation to free_fragment
> > 9. use API from snprintf to av_asprintf
> >
> > v3 fixed:
> > 1. fix typo from --enabled-xml2 to --enable-xml2
> >
> > v4 fixed:
> > 1. from --enable-xml2 to --enable-libxml2
> > 2. move system includes to top
> > 3. remove nouse includes
> > 4. rename enum name
> > 5. add a trailing comma for the last entry enum
> > 6. fix comment typo
> > 7. add const to DASHContext class front
> > 8. check sscanf if return arguments and give warning message when error
> > 9. check validity before free seg->url and seg
> > 10. check if the val is null, before use atoll
> >
> > v5 fixed:
> > 1. fix typo from mainifest to manifest
> >
> > v6 fixed:
> > 1. from realloc to av_realloc
> > 2. from free to av_free
> >
> > v7 fixed:
> > 1. remove the -lxml2 from configure when require_pkg_config
> >
> > v8 fixed:
> > 1. fix replace filename template by av_asprintf secure problem
> >
> > v9 modified:
> > 1. make manifest parser clearly
> >
> > v10 fixed:
> > 1. fix function API name code style
> > 2. remove redundant strreplace call
> > 3. remove redundant memory operation and check return value from
> get_content_url()
> > 4. add space between ) and {
> > 5. remove no need to log the value for print
> >
> > v11 fixed:
> > 1. from atoll to strtoll
> >
> > Reviewed-by: Clément Bœsch <u...@pkh.me>
> > Reviewed-by: Michael Niedermayer <mich...@niedermayer.cc>
> > Reviewed-by: Carl Eugen Hoyos <ceho...@ag.or.at>
> > Reviewed-by: Rodger Combs <rodger.co...@gmail.com>
> > Reviewed-by: Moritz Barsnick <barsn...@gmx.net>
> > Reviewed-by: Nicolas George <geo...@nsup.org>
> > Reviewed-by: Ricardo Constantino <wiia...@gmail.com>
> > Signed-off-by: Steven Liu <l...@chinaffmpeg.org>
> > ---
> > configure | 4 +
> > libavformat/Makefile | 1 +
> > libavformat/allformats.c | 2 +-
> > libavformat/dashdec.c | 1851 ++++++++++++++++++++++++++++++
> ++++++++++++++++
> > 4 files changed, 1857 insertions(+), 1 deletion(-)
> > create mode 100644 libavformat/dashdec.c
> >
> > diff --git a/configure b/configure
> > index 9cc7e7d..4a6fe8a 100755
> > --- a/configure
> > +++ b/configure
> > @@ -273,6 +273,7 @@ External library support:
> > --enable-libxcb-shape enable X11 grabbing shape rendering
> [autodetect]
> > --enable-libxvid enable Xvid encoding via xvidcore,
> > native MPEG-4/Xvid encoder exists [no]
> > + --enable-libxml2 enable XML parsing using the C library
> libxml2 [no]
> > --enable-libzimg enable z.lib, needed for zscale filter [no]
> > --enable-libzmq enable message passing via libzmq [no]
> > --enable-libzvbi enable teletext support via libzvbi [no]
> > @@ -1574,6 +1575,7 @@ EXTERNAL_LIBRARY_LIST="
> > libvpx
> > libwavpack
> > libwebp
> > + libxml2
> > libzimg
> > libzmq
> > libzvbi
> > @@ -2906,6 +2908,7 @@ avi_muxer_select="riffenc"
> > caf_demuxer_select="iso_media riffdec"
> > caf_muxer_select="iso_media"
> > dash_muxer_select="mp4_muxer"
> > +dash_demuxer_deps="libxml2"
> > dirac_demuxer_select="dirac_parser"
> > dts_demuxer_select="dca_parser"
> > dtshd_demuxer_select="dca_parser"
> > @@ -5908,6 +5911,7 @@ enabled openssl && { use_pkg_config
> openssl openssl/ssl.h OPENSSL_init
> > check_lib openssl/ssl.h SSL_library_init
> -lssl -lcrypto -lws2_32 -lgdi32 ||
> > die "ERROR: openssl not found"; }
> > enabled qtkit_indev && { check_header_objcc QTKit/QTKit.h ||
> disable qtkit_indev; }
> > +enabled libxml2 && require_pkg_config libxml-2.0
> libxml2/libxml/xmlversion.h xmlCheckVersion
> >
> > # libdc1394 check
> > if enabled libdc1394; then
> > diff --git a/libavformat/Makefile b/libavformat/Makefile
> > index f56ef16..d77ffaa 100644
> > --- a/libavformat/Makefile
> > +++ b/libavformat/Makefile
> > @@ -134,6 +134,7 @@ OBJS-$(CONFIG_CRC_MUXER) += crcenc.o
> > OBJS-$(CONFIG_DATA_DEMUXER) += rawdec.o
> > OBJS-$(CONFIG_DATA_MUXER) += rawenc.o
> > OBJS-$(CONFIG_DASH_MUXER) += dashenc.o
> > +OBJS-$(CONFIG_DASH_DEMUXER) += dashdec.o
> > OBJS-$(CONFIG_DAUD_DEMUXER) += dauddec.o
> > OBJS-$(CONFIG_DAUD_MUXER) += daudenc.o
> > OBJS-$(CONFIG_DCSTR_DEMUXER) += dcstr.o
> > diff --git a/libavformat/allformats.c b/libavformat/allformats.c
> > index 09e62c3..d57314b 100644
> > --- a/libavformat/allformats.c
> > +++ b/libavformat/allformats.c
> > @@ -96,7 +96,7 @@ static void register_all(void)
> > REGISTER_DEMUXER (CINE, cine);
> > REGISTER_DEMUXER (CONCAT, concat);
> > REGISTER_MUXER (CRC, crc);
> > - REGISTER_MUXER (DASH, dash);
> > + REGISTER_MUXDEMUX(DASH, dash);
> > REGISTER_MUXDEMUX(DATA, data);
> > REGISTER_MUXDEMUX(DAUD, daud);
> > REGISTER_DEMUXER (DCSTR, dcstr);
> > diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c
> > new file mode 100644
> > index 0000000..ee69bc9
> > --- /dev/null
> > +++ b/libavformat/dashdec.c
> > @@ -0,0 +1,1851 @@
> > +/*
> > + * Dynamic Adaptive Streaming over HTTP demux
> > + * Copyright (c) 2017 samsam...@o2.pl based on HLS demux
> > + * Copyright (c) 2017 Steven Liu
> > + *
> > + * This file is part of FFmpeg.
> > + *
> > + * FFmpeg is free software; you can redistribute it and/or
> > + * modify it under the terms of the GNU Lesser General Public
> > + * License as published by the Free Software Foundation; either
> > + * version 2.1 of the License, or (at your option) any later version.
> > + *
> > + * FFmpeg is distributed in the hope that it will be useful,
> > + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> > + * Lesser General Public License for more details.
> > + *
> > + * You should have received a copy of the GNU Lesser General Public
> > + * License along with FFmpeg; if not, write to the Free Software
> > + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> 02110-1301 USA
> > + */
> > +#include <libxml/parser.h>
> > +#include "libavutil/intreadwrite.h"
> > +#include "libavutil/opt.h"
> > +#include "libavutil/time.h"
> > +#include "libavutil/parseutils.h"
> > +#include "internal.h"
> > +#include "avio_internal.h"
> > +
> > +#define INITIAL_BUFFER_SIZE 32768
> > +
> > +struct fragment {
> > + int64_t url_offset;
> > + int64_t size;
> > + char *url;
> > +};
> > +
> > +/*
> > + * reference to : ISO_IEC_23009-1-DASH-2012
> > + * Section: 5.3.9.6.2
> > + * Table: Table 17 — Semantics of SegmentTimeline element
> > + * */
> > +struct timeline {
> > + /* t: Element or Attribute Name
> > + * specifies the MPD start time, in @timescale units,
> > + * the first Segment in the series starts relative to the beginning
> of the Period.
> > + * The value of this attribute must be equal to or greater than the
> sum of the previous S
> > + * element earliest presentation time and the sum of the contiguous
> Segment durations.
> > + * If the value of the attribute is greater than what is expressed
> by the previous S element,
> > + * it expresses discontinuities in the timeline.
> > + * If not present then the value shall be assumed to be zero for
> the first S element
> > + * and for the subsequent S elements, the value shall be assumed to
> be the sum of
> > + * the previous S element's earliest presentation time and
> contiguous duration
> > + * (i.e. previous S@t + @d * (@r + 1)).
> > + * */
> > + int64_t t;
> > + /* r: Element or Attribute Name
> > + * specifies the repeat count of the number of following contiguous
> Segments with
> > + * the same duration expressed by the value of @d. This value is
> zero-based
> > + * (e.g. a value of three means four Segments in the contiguous
> series).
> > + * */
> > + int64_t r;
> > + /* d: Element or Attribute Name
> > + * specifies the Segment duration, in units of the value of the
> @timescale.
> > + * */
> > + int64_t d;
> > +};
> > +
> > +enum DASHTmplUrlType {
> > + TMP_URL_TYPE_UNSPECIFIED,
> > + TMP_URL_TYPE_NUMBER,
> > + TMP_URL_TYPE_TIME,
> > +};
> > +
> > +/*
> > + * Each playlist has its own demuxer. If it is currently active,
> > + * it has an opened AVIOContext too, and potentially an AVPacket
> > + * containing the next packet from this stream.
> > + */
> > +struct representation {
> > + char *url_template;
> > + enum DASHTmplUrlType tmp_url_type;
> > + AVIOContext pb;
> > + AVIOContext *input;
> > + AVFormatContext *parent;
> > + AVFormatContext *ctx;
> > + AVPacket pkt;
> > + int rep_idx;
> > + int rep_count;
> > + int stream_index;
> > +
> > + enum AVMediaType type;
> > + int64_t target_duration;
> > +
> > + int n_fragments;
> > + struct fragment **fragments; /* VOD list of fragment for profile */
> > +
> > + int n_timelines;
> > + struct timeline **timelines;
> > +
> > + int64_t first_seq_no;
> > + int64_t last_seq_no;
> > +
> > + int64_t fragment_duration;
> > + int64_t fragment_timescale;
> > +
> > + int64_t cur_seq_no;
> > + int64_t cur_seg_offset;
> > + int64_t cur_seg_size;
> > + struct fragment *cur_seg;
> > +
> > + /* Currently active Media Initialization Section */
> > + struct fragment *init_section;
> > + uint8_t *init_sec_buf;
> > + uint32_t init_sec_buf_size;
> > + uint32_t init_sec_data_len;
> > + uint32_t init_sec_buf_read_offset;
> > + int fix_multiple_stsd_order;
> > + int64_t cur_timestamp;
> > +};
> > +
> > +typedef struct DASHContext {
> > + const AVClass *class;
> > + char *base_url;
> > + struct representation *cur_video;
> > + struct representation *cur_audio;
> > + uint64_t media_presentation_duration_sec;
> > + uint64_t suggested_presentation_delay_sec;
> > + uint64_t presentation_delay_sec;
> > + uint64_t availability_start_time_sec;
> > + uint64_t publish_time_sec;
> > + uint64_t minimum_update_period_sec;
> > + uint64_t time_shift_buffer_depth_sec;
> > + uint64_t min_buffer_time_sec;
> > + uint64_t period_duration_sec;
> > + uint64_t period_start_sec;
> > + int is_live;
> > + AVIOInterruptCB *interrupt_callback;
> > + char *user_agent; ///< holds HTTP user agent set
> as an AVOption to the HTTP protocol context
> > + char *cookies; ///< holds HTTP cookie values
> set in either the initial response or as an AVOption to the HTTP protocol
> context
> > + char *headers; ///< holds HTTP headers set as
> an AVOption to the HTTP protocol context
> > + AVDictionary *avio_opts;
> > +} DASHContext;
> > +
> > +static uint64_t get_current_time_in_sec(void)
> > +{
> > + return av_gettime() / 1000000;
> > +}
> > +
> > +static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char
> *datetime)
> > +{
> > + struct tm timeinfo;
> > + int year = 0;
> > + int month = 0;
> > + int day = 0;
> > + int hour = 0;
> > + int minute = 0;
> > + int ret = 0;
> > + float second = 0.0;
> > +
> > + /* ISO-8601 date parser */
> > + if (!datetime)
> > + return 0;
> > +
> > + ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day,
> &hour, &minute, &second);
> > + /* year, month, day, hour, minute, second 6 arguments */
> > + if (ret != 6) {
> > + av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong
> time format\n");
> > + // return 0; /* parser error */
> > + }
> > + timeinfo.tm_year = year - 1900;
> > + timeinfo.tm_mon = month - 1;
> > + timeinfo.tm_mday = day;
> > + timeinfo.tm_hour = hour;
> > + timeinfo.tm_min = minute;
> > + timeinfo.tm_sec = (int)second;
> > +
> > + return av_timegm(&timeinfo);
> > +}
> > +
> > +static uint32_t get_duration_insec(AVFormatContext *s, const char
> *duration)
> > +{
> > + /* ISO-8601 duration parser */
> > + uint32_t days = 0;
> > + uint32_t hours = 0;
> > + uint32_t mins = 0;
> > + uint32_t secs = 0;
> > + uint32_t size = 0;
> > + float value = 0;
> > + uint8_t type = 0;
> > + const char *ptr = duration;
> > +
> > + while (*ptr) {
> > + if (*ptr == 'P' || *ptr == 'T') {
> > + ptr++;
> > + continue;
> > + }
> > +
> > + if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
> > + av_log(s, AV_LOG_WARNING, "get_duration_insec get a wrong
> time format\n");
> > + return 0; /* parser error */
> > + }
> > + switch (type) {
> > + case 'D':
> > + days = (uint32_t)value;
> > + break;
> > + case 'H':
> > + hours = (uint32_t)value;
> > + break;
> > + case 'M':
> > + mins = (uint32_t)value;
> > + break;
> > + case 'S':
> > + secs = (uint32_t)value;
> > + break;
> > + default:
> > + // handle invalid type
> > + break;
> > + }
> > + ptr += size;
> > + }
> > + return ((days * 24 + hours) * 60 + mins) * 60 + secs;
> > +}
> > +
> > +static void free_fragment(struct fragment **seg)
> > +{
> > + if (!(*seg)) {
> > + return;
> > + }
> > + av_freep(&(*seg)->url);
> > + av_freep(seg);
> > +}
> > +
> > +static void free_fragment_list(struct representation *pls)
> > +{
> > + int i;
> > +
> > + for (i = 0; i < pls->n_fragments; i++) {
> > + free_fragment(&pls->fragments[i]);
> > + }
> > + av_freep(&pls->fragments);
> > + pls->n_fragments = 0;
> > +}
> > +
> > +static void free_timelines_list(struct representation *pls)
> > +{
> > + int i;
> > +
> > + for (i = 0; i < pls->n_timelines; i++) {
> > + av_freep(&pls->timelines[i]);
> > + }
> > + av_freep(&pls->timelines);
> > + pls->n_timelines = 0;
> > +}
> > +
> > +/*
> > + * Used to reset a statically allocated AVPacket to a clean slate,
> > + * containing no data.
> > + */
> > +static void reset_packet(AVPacket *pkt)
> > +{
> > + av_init_packet(pkt);
> > + pkt->data = NULL;
> > +}
> > +
> > +static void free_representation(struct representation *pls)
> > +{
> > + free_fragment_list(pls);
> > + free_timelines_list(pls);
> > + free_fragment(&pls->cur_seg);
> > + free_fragment(&pls->init_section);
> > + av_freep(&pls->init_sec_buf);
> > + av_packet_unref(&pls->pkt);
> > + reset_packet(&pls->pkt);
> > + av_freep(&pls->pb.buffer);
> > + if (pls->input)
> > + ff_format_io_close(pls->parent, &pls->input);
> > + if (pls->ctx) {
> > + pls->ctx->pb = NULL;
> > + avformat_close_input(&pls->ctx);
> > + }
> > +
> > + av_free(pls->url_template);
> > + av_free(pls);
> > +}
> > +
> > +static void update_options(char **dest, const char *name, void *src)
> > +{
> > + av_freep(dest);
> > + av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest);
> > + if (*dest)
> > + av_freep(dest);
> > +}
> > +
> > +static int open_url(AVFormatContext *s, AVIOContext **pb, const char
> *url,
> > + AVDictionary *opts, AVDictionary *opts2, int
> *is_http)
> > +{
> > + DASHContext *c = s->priv_data;
> > + AVDictionary *tmp = NULL;
> > + const char *proto_name = NULL;
> > + int ret;
> > +
> > + av_dict_copy(&tmp, opts, 0);
> > + av_dict_copy(&tmp, opts2, 0);
> > +
> > + if (av_strstart(url, "crypto", NULL)) {
> > + if (url[6] == '+' || url[6] == ':')
> > + proto_name = avio_find_protocol_name(url + 7);
> > + }
> > +
> > + if (!proto_name)
> > + proto_name = avio_find_protocol_name(url);
> > +
> > + if (!proto_name)
> > + return AVERROR_INVALIDDATA;
> > +
> > + // only http(s) & file are allowed
> > + if (!av_strstart(proto_name, "http", NULL) &&
> !av_strstart(proto_name, "file", NULL))
> > + return AVERROR_INVALIDDATA;
> > + if (!strncmp(proto_name, url, strlen(proto_name)) &&
> url[strlen(proto_name)] == ':')
> > + ;
> > + else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name,
> url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
> > + ;
> > + else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
> > + return AVERROR_INVALIDDATA;
>
> Don't we have the protocol whitelist stuff for this?
>
This is copy from libavformat/hls.c
>
> > +
> > + ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
> > + if (ret >= 0) {
> > + // update cookies on http response with setcookies.
> > + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
> > + update_options(&c->cookies, "cookies", u);
> > + av_dict_set(&opts, "cookies", c->cookies, 0);
> > + }
> > +
> > + av_dict_free(&tmp);
> > +
> > + if (is_http)
> > + *is_http = av_strstart(proto_name, "http", NULL);
> > +
> > + return ret;
> > +
> > +}
> > +
> > +static char *strreplace(const char *str, const char *from, const char
> *to)
> > +{
> > + /* Adjust each of the below values to suit your needs. */
> > + /* Increment positions cache size initially by this number. */
> > + size_t cache_sz_inc = 16;
> > + /* Thereafter, each time capacity needs to be increased,
> > + * multiply the increment by this factor. */
> > + const size_t cache_sz_inc_factor = 3;
> > + /* But never increment capacity by more than this number. */
> > + const size_t cache_sz_inc_max = 1048576;
> > +
> > + char *pret, *ret = NULL;
> > + const char *pstr2, *pstr = str;
> > + size_t i, count = 0;
> > + uintptr_t *pos_cache_tmp, *pos_cache = NULL;
> > + size_t cache_sz = 0;
> > + size_t cpylen, orglen, retlen, tolen, fromlen = strlen(from);
> > +
> > + /* Find all matches and cache their positions. */
> > + while ((pstr2 = av_stristr(pstr, from))) {
> > + count++;
> > + /* Increase the cache size when necessary. */
> > + if (cache_sz < count) {
> > + cache_sz += cache_sz_inc;
> > + pos_cache_tmp = av_realloc(pos_cache, sizeof(*pos_cache) *
> cache_sz);
> > + if (!pos_cache_tmp) {
> > + goto end_strreplace;
> > + } else pos_cache = pos_cache_tmp;
> > + cache_sz_inc *= cache_sz_inc_factor;
> > + if (cache_sz_inc > cache_sz_inc_max) {
> > + cache_sz_inc = cache_sz_inc_max;
> > + }
> > + }
> > +
> > + pos_cache[count-1] = pstr2 - str;
> > + pstr = pstr2 + fromlen;
> > + }
> > + orglen = pstr - str + strlen(pstr);
> > + /* Allocate memory for the post-replacement string. */
> > + if (count > 0) {
> > + tolen = strlen(to);
> > + retlen = orglen + (tolen - fromlen) * count;
> > + } else {
> > + retlen = orglen;
> > + }
> > + ret = av_malloc(retlen + 1);
> > + if (!ret) {
> > + goto end_strreplace;
> > + }
> > +
> > + if (!count) {
> > + /* If no matches, then just duplicate the string. */
> > + av_strlcpy(ret, str, retlen + 1);
> > + } else {
> > + /* Otherwise, duplicate the string whilst performing
> > + * the replacements using the position cache. */
> > + pret = ret;
> > + memcpy(pret, str, pos_cache[0]);
> > + pret += pos_cache[0];
> > + for (i = 0; i < count; i++) {
> > + memcpy(pret, to, tolen);
> > + pret += tolen;
> > + pstr = str + pos_cache[i] + fromlen;
> > + cpylen = (i == count-1 ? orglen : pos_cache[i+1]) -
> pos_cache[i] - fromlen;
> > + memcpy(pret, pstr, cpylen);
> > + pret += cpylen;
> > + }
> > + ret[retlen] = '\0';
> > + }
> > +
> > +end_strreplace:
> > + /* Free the cache and return the post-replacement string,
> > + * which will be NULL in the event of an error. */
> > + av_free(pos_cache);
> > + return ret;
> > +}
>
> This function looks like it's copy pasted from
> http://creativeandcritical.net/str-replace-c
>
> It should probably be placed into libavutil, with proper copyright
> attribution. (If it even has a compatible license.)
>
ok, let me check the license with the str-replace-c author if we can add it
into ffmpeg.
>
> > +static char *replace_template_str(const char *url, const char *marker)
> > +{
> > + char *prefix = NULL;
> > + char *start = 0;
> > + char *end = NULL;
> > + char *tmp_url = NULL;
> > + int marker_len;
> > +
> > + prefix = av_strdup(marker);
> > + marker_len = strlen(prefix) - 1;
> > + prefix[marker_len] = '\0';
> > +
> > + start = av_stristr(url, prefix);
> > + if (!start)
> > + goto finish;
> > + end = strchr(start + 1, '$');
> > + if (!end)
> > + goto finish;
> > +
> > + tmp_url = av_mallocz(MAX_URL_SIZE);
> > + if (!tmp_url) {
> > + return NULL;
> > + }
> > +
> > + av_strlcpy(tmp_url, url, start - url+ 1);
> > + av_strlcat(tmp_url, start + marker_len, strlen(tmp_url) + end -
> start - marker_len + 1);
> > + av_strlcat(tmp_url, end + 1, MAX_URL_SIZE);
> > +
> > +finish:
> > + av_free(prefix);
> > + return tmp_url;
> > +}
> > +
> > +static char *get_content_url(xmlNodePtr *baseurl_nodes, int
> n_baseurl_nodes, xmlChar *rep_id_val, xmlChar *rep_bandwidth_val, xmlChar
> *val)
> > +{
> > + int i;
> > + xmlChar *text;
> > + char *url = NULL;
> > + char *tmp_str = av_mallocz(MAX_URL_SIZE);
> > + char *tmp_str_2 = NULL;
> > +
> > + if (!tmp_str) {
> > + return NULL;
> > + }
> > + for (i = 0; i < n_baseurl_nodes; ++i) {
> > + if (baseurl_nodes[i] && baseurl_nodes[i]->children &&
> baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
> > + text = xmlNodeGetContent(baseurl_nodes[i]->children);
> > + if (text) {
> > + tmp_str_2 = av_mallocz(MAX_URL_SIZE);
> > + if (!tmp_str_2) {
> > + av_free(tmp_str);
> > + return NULL;
> > + }
> > + ff_make_absolute_url(tmp_str_2, MAX_URL_SIZE, tmp_str,
> text);
> > + av_free(tmp_str);
> > + tmp_str = tmp_str_2;
> > + xmlFree(text);
> > + }
> > + }
> > + }
> > + if (val)
> > + av_strlcat(tmp_str, (const char*)val, MAX_URL_SIZE);
> > + if (rep_id_val) {
> > + url = strreplace(tmp_str, "$RepresentationID$", (const
> char*)rep_id_val);
> > + av_free(tmp_str);
> > + tmp_str = url;
> > + }
> > + if (rep_bandwidth_val && tmp_str)
> > + url = strreplace(tmp_str, "$Bandwidth$", (const
> char*)rep_bandwidth_val);
> > + if (tmp_str != url)
> > + av_free(tmp_str);
> > + return url;
> > +}
> > +
> > +static xmlChar *get_val_from_nodes_tab(xmlNodePtr *nodes, const int
> n_nodes, const xmlChar *attrname)
> > +{
> > + int i;
> > + xmlChar *val;
> > +
> > + for (i = 0; i < n_nodes; ++i) {
> > + if (nodes[i]) {
> > + val = xmlGetProp(nodes[i], attrname);
> > + if (val)
> > + return val;
> > + }
> > + }
> > +
> > + return NULL;
> > +}
> > +
> > +static xmlNodePtr find_child_node_by_name(xmlNodePtr rootnode, const
> xmlChar *nodename)
> > +{
> > + xmlNodePtr node = rootnode;
> > + if (!node) {
> > + return NULL;
> > + }
> > +
> > + node = xmlFirstElementChild(node);
> > + while (node) {
> > + if (!xmlStrcmp(node->name, nodename)) {
> > + return node;
> > + }
> > + node = xmlNextElementSibling(node);
> > + }
> > + return NULL;
> > +}
> > +
> > +static enum AVMediaType get_content_type(xmlNodePtr node)
> > +{
> > + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
> > + int i = 0;
> > + const char *attr;
> > +
> > + if (node) {
> > + while (type == AVMEDIA_TYPE_UNKNOWN && i < 2) {
> > + attr = (i) ? "mimeType" : "contentType";
> > + xmlChar *val = xmlGetProp(node, attr);
> > + if (val) {
> > + if (av_stristr((const char *)val, "video")) {
> > + type = AVMEDIA_TYPE_VIDEO;
> > + } else if (av_stristr((const char *)val, "audio")) {
> > + type = AVMEDIA_TYPE_AUDIO;
> > + }
> > + xmlFree(val);
> > + }
> > + i++;
> > + }
> > + }
> > + return type;
> > +}
> > +
> > +static int parse_manifest_segmenturlnode(AVFormatContext *s, struct
> representation *rep,
> > + xmlNodePtr fragmenturl_node,
> > + xmlNodePtr *baseurl_nodes,
> > + xmlChar *rep_id_val,
> > + xmlChar *rep_bandwidth_val)
> > +{
> > + xmlChar *initialization_val = NULL;
> > + xmlChar *media_val = NULL;
> > +
> > + if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar
> *)"Initialization")) {
> > + initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
> > + if (initialization_val) {
> > + rep->init_section = av_mallocz(sizeof(struct fragment));
> > + if (!rep->init_section) {
> > + xmlFree(initialization_val);
> > + return AVERROR(ENOMEM);
> > + }
> > + rep->init_section->url = get_content_url(baseurl_nodes, 4,
> rep_id_val, rep_bandwidth_val, initialization_val);
> > + if (!rep->init_section->url) {
> > + av_free(rep->init_section);
> > + xmlFree(initialization_val);
> > + return AVERROR(ENOMEM);
> > + }
> > + rep->init_section->size = -1;
> > + xmlFree(initialization_val);
> > + }
> > + } else if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar
> *)"SegmentURL")) {
> > + media_val = xmlGetProp(fragmenturl_node, "media");
> > + if (media_val) {
> > + struct fragment *seg = av_mallocz(sizeof(struct fragment));
> > + if (!seg) {
> > + xmlFree(media_val);
> > + return AVERROR(ENOMEM);
> > + }
> > + seg->url = get_content_url(baseurl_nodes, 4, rep_id_val,
> rep_bandwidth_val, media_val);
> > + if (!seg->url) {
> > + av_free(seg);
> > + xmlFree(media_val);
> > + return AVERROR(ENOMEM);
> > + }
> > + seg->size = -1;
> > + dynarray_add(&rep->fragments, &rep->n_fragments, seg);
> > + xmlFree(media_val);
> > + }
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int parse_manifest_segmenttimeline(AVFormatContext *s, struct
> representation *rep,
> > + xmlNodePtr
> fragment_timeline_node)
> > +{
> > + xmlAttrPtr attr = NULL;
> > + xmlChar *val = NULL;
> > +
> > + if (!xmlStrcmp(fragment_timeline_node->name, (const xmlChar
> *)"S")) {
> > + struct timeline *tml = av_mallocz(sizeof(struct timeline));
> > + if (!tml) {
> > + return AVERROR(ENOMEM);
> > + }
> > + attr = fragment_timeline_node->properties;
> > + while (attr) {
> > + val = xmlGetProp(fragment_timeline_node, attr->name);
> > +
> > + if (!val) {
> > + av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline
> attr->name = %s val is NULL\n", attr->name);
> > + continue;
> > + }
> > +
> > + if (!xmlStrcmp(attr->name, (const xmlChar *)"t")) {
> > + tml->t = (int64_t)strtoll(val, NULL, 10);
> > + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"r")) {
> > + tml->r =(int64_t) strtoll(val, NULL, 10);
> > + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"d")) {
> > + tml->d = (int64_t)strtoll(val, NULL, 10);
> > + rep->fragment_duration = (int64_t) strtoll(val, NULL,
> 10);
> > + }
> > + attr = attr->next;
> > + xmlFree(val);
> > + }
> > + dynarray_add(&rep->timelines, &rep->n_timelines, tml);
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int parse_manifest_representation(AVFormatContext *s, const
> char *url,
> > + xmlNodePtr node,
> > + xmlNodePtr adaptionset_node,
> > + xmlNodePtr mpd_baseurl_node,
> > + xmlNodePtr period_baseurl_node,
> > + xmlNodePtr
> fragment_template_node,
> > + xmlNodePtr
> content_component_node,
> > + xmlNodePtr
> adaptionset_baseurl_node)
> > +{
> > + int32_t ret = 0;
> > + int32_t audio_rep_idx = 0;
> > + int32_t video_rep_idx = 0;
> > + char *temp_string = NULL;
> > + DASHContext *c = s->priv_data;
> > + struct representation *rep = NULL;
> > + struct fragment *seg = NULL;
> > + xmlNodePtr representation_segmenttemplate_node = NULL;
> > + xmlNodePtr representation_baseurl_node = NULL;
> > + xmlNodePtr representation_segmentlist_node = NULL;
> > + xmlNodePtr fragment_timeline_node = NULL;
> > + xmlNodePtr fragment_templates_tab[2];
> > + xmlChar *duration_val = NULL;
> > + xmlChar *startnumber_val = NULL;
> > + xmlChar *timescale_val = NULL;
> > + xmlChar *initialization_val = NULL;
> > + xmlChar *media_val = NULL;
> > + xmlNodePtr baseurl_nodes[4];
> > + xmlNodePtr representation_node = node;
> > + xmlChar *rep_id_val = xmlGetProp(representation_node, "id");
> > + xmlChar *rep_bandwidth_val = xmlGetProp(representation_node,
> "bandwidth");
> > + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
> > +
> > + // try get information from representation
> > + if (type == AVMEDIA_TYPE_UNKNOWN)
> > + type = get_content_type(representation_node);
> > + // try get information from contentComponen
> > + if (type == AVMEDIA_TYPE_UNKNOWN)
> > + type = get_content_type(content_component_node);
> > + // try get information from adaption set
> > + if (type == AVMEDIA_TYPE_UNKNOWN)
> > + type = get_content_type(adaptionset_node);
> > + if (type == AVMEDIA_TYPE_UNKNOWN) {
> > + av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported
> representation type\n", url);
> > + } else if ((type == AVMEDIA_TYPE_VIDEO && !c->cur_video) || (type
> == AVMEDIA_TYPE_AUDIO && !c->cur_audio)) {
> > + // convert selected representation to our internal struct
> > + rep = av_mallocz(sizeof(struct representation));
> > + if (!rep) {
> > + ret = AVERROR(ENOMEM);
> > + goto end;
> > + }
> > + representation_segmenttemplate_node =
> find_child_node_by_name(representation_node, "SegmentTemplate");
> > + representation_baseurl_node =
> > find_child_node_by_name(representation_node,
> "BaseURL");
> > + representation_segmentlist_node =
> find_child_node_by_name(representation_node, "SegmentList");
> > + reset_packet(&rep->pkt);
> > +
> > + baseurl_nodes[0] = mpd_baseurl_node;
> > + baseurl_nodes[1] = period_baseurl_node;
> > + baseurl_nodes[2] = adaptionset_baseurl_node;
> > + baseurl_nodes[3] = representation_baseurl_node;
> > +
> > + if (representation_segmenttemplate_node ||
> fragment_template_node) {
> > + fragment_timeline_node = NULL;
> > + fragment_templates_tab[0] = representation_segmenttemplate
> _node;
> > + fragment_templates_tab[1] = fragment_template_node;
> > +
> > + duration_val = get_val_from_nodes_tab(fragment_templates_tab,
> 2, "duration");
> > + startnumber_val =
> > get_val_from_nodes_tab(fragment_templates_tab,
> 2, "startNumber");
> > + timescale_val = get_val_from_nodes_tab(fragment_templates_tab,
> 2, "timescale");
> > + initialization_val =
> > get_val_from_nodes_tab(fragment_templates_tab,
> 2, "initialization");
> > + media_val = get_val_from_nodes_tab(fragment_templates_tab,
> 2, "media");
> > +
> > + if (initialization_val) {
> > + rep->init_section = av_mallocz(sizeof(struct fragment));
> > + if (!rep->init_section) {
> > + av_free(rep);
> > + ret = AVERROR(ENOMEM);
> > + goto end;
> > + }
> > + rep->init_section->url = get_content_url(baseurl_nodes,
> 4, rep_id_val, rep_bandwidth_val, initialization_val);
> > + if (!rep->init_section->url) {
> > + av_free(rep->init_section);
> > + av_free(rep);
> > + ret = AVERROR(ENOMEM);
> > + goto end;
> > + }
> > + rep->init_section->size = -1;
> > + xmlFree(initialization_val);
> > + }
> > +
> > + if (media_val) {
> > + rep->url_template = get_content_url(baseurl_nodes, 4,
> rep_id_val, rep_bandwidth_val, media_val);
> > + temp_string = rep->url_template;
> > + if (temp_string) {
> > + if (av_stristr(temp_string, "$Number")) {
> > + rep->tmp_url_type = TMP_URL_TYPE_NUMBER; /*
> Number-Based. */
> > + } else if (av_stristr(temp_string, "$Time")) {
> > + rep->tmp_url_type = TMP_URL_TYPE_TIME; /*
> Time-Based. */
> > + } else {
> > + temp_string = NULL;
> > + }
> > + }
> > + xmlFree(media_val);
> > + }
> > + if (duration_val) {
> > + rep->fragment_duration = (int64_t)
> strtoll(duration_val, NULL, 10);
> > + xmlFree(duration_val);
> > + }
> > + if (timescale_val) {
> > + rep->fragment_timescale = (int64_t)
> strtoll(timescale_val, NULL, 10);
> > + xmlFree(timescale_val);
> > + }
> > + if (startnumber_val) {
> > + rep->first_seq_no = (int64_t) strtoll(startnumber_val,
> NULL, 10);
> > + xmlFree(startnumber_val);
> > + }
> > +
> > + fragment_timeline_node =
> > find_child_node_by_name(representation_segmenttemplate_node,
> "SegmentTimeline");
> > +
> > + if (!fragment_timeline_node)
> > + fragment_timeline_node =
> > find_child_node_by_name(fragment_template_node,
> "SegmentTimeline");
> > + if (fragment_timeline_node) {
> > + fragment_timeline_node = xmlFirstElementChild(fragment_
> timeline_node);
> > + while (fragment_timeline_node) {
> > + ret = parse_manifest_segmenttimeline(s, rep,
> fragment_timeline_node);
> > + if (ret < 0) {
> > + return ret;
> > + }
> > + fragment_timeline_node =
> xmlNextElementSibling(fragment_timeline_node);
> > + }
> > + }
> > + } else if (representation_baseurl_node &&
> !representation_segmentlist_node) {
> > + seg = av_mallocz(sizeof(struct fragment));
> > + if (!seg) {
> > + ret = AVERROR(ENOMEM);
> > + goto end;
> > + }
> > + seg->url = get_content_url(baseurl_nodes, 4, rep_id_val,
> rep_bandwidth_val, NULL);
> > + if (!seg->url) {
> > + av_free(seg);
> > + ret = AVERROR(ENOMEM);
> > + goto end;
> > + }
> > + seg->size = -1;
> > + dynarray_add(&rep->fragments, &rep->n_fragments, seg);
> > + } else if (!representation_baseurl_node &&
> representation_segmentlist_node) {
> > + // TODO: https://www.brendanlong.com/th
> e-structure-of-an-mpeg-dash-mpd.html
> > + // http://www-itec.uni-klu.ac.at/
> dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
> > + xmlNodePtr fragmenturl_node = NULL;
> > + duration_val = xmlGetProp(representation_segmentlist_node,
> "duration");
> > + timescale_val = xmlGetProp(representation_segmentlist_node,
> "timescale");
> > + if (duration_val) {
> > + rep->fragment_duration = (int64_t)
> strtoll(duration_val, NULL, 10);
> > + xmlFree(duration_val);
> > + }
> > + if (timescale_val) {
> > + rep->fragment_timescale = (int64_t)
> strtoll(timescale_val, NULL, 10);
> > + xmlFree(timescale_val);
> > + }
> > + fragmenturl_node = xmlFirstElementChild(represent
> ation_segmentlist_node);
> > + while (fragmenturl_node) {
> > + ret = parse_manifest_segmenturlnode(s, rep,
> fragmenturl_node, baseurl_nodes, rep_id_val, rep_bandwidth_val);
> > + if (ret < 0) {
> > + return ret;
> > + }
> > + fragmenturl_node = xmlNextElementSibling(fragment
> url_node);
> > + }
> > + } else {
> > + free_representation(rep);
> > + rep = NULL;
> > + av_log(s, AV_LOG_ERROR, "Unknown format of Representation
> node id[%s] \n", (const char *)rep_id_val);
> > + }
> > +
> > + if (rep) {
> > + if (rep->fragment_duration > 0 && !rep->fragment_timescale)
> > + rep->fragment_timescale = 1;
> > + if (type == AVMEDIA_TYPE_VIDEO) {
> > + rep->rep_idx = video_rep_idx;
> > + c->cur_video = rep;
> > + } else {
> > + rep->rep_idx = audio_rep_idx;
> > + c->cur_audio = rep;
> > + }
> > + }
> > + }
> > +
> > + video_rep_idx += type == AVMEDIA_TYPE_VIDEO;
> > + audio_rep_idx += type == AVMEDIA_TYPE_AUDIO;
> > +
> > +end:
> > + if (rep_id_val)
> > + xmlFree(rep_id_val);
> > + if (rep_bandwidth_val)
> > + xmlFree(rep_bandwidth_val);
> > +
> > + return ret;
> > +}
> > +
> > +static int parse_manifest_adaptationset(AVFormatContext *s, const char
> *url, xmlNodePtr adaptionset_node, xmlNodePtr mpd_baseurl_node, xmlNodePtr
> period_baseurl_node)
> > +{
> > + int ret = 0;
> > + xmlNodePtr fragment_template_node = NULL;
> > + xmlNodePtr content_component_node = NULL;
> > + xmlNodePtr adaptionset_baseurl_node = NULL;
> > + xmlNodePtr node = NULL;
> > +
> > + node = xmlFirstElementChild(adaptionset_node);
> > + while (node) {
> > + if (!xmlStrcmp(node->name, (const xmlChar *)"SegmentTemplate"))
> {
> > + fragment_template_node = node;
> > + } else if (!xmlStrcmp(node->name, (const xmlChar
> *)"ContentComponent")) {
> > + content_component_node = node;
> > + } else if (!xmlStrcmp(node->name, (const xmlChar *)"BaseURL")) {
> > + adaptionset_baseurl_node = node;
> > + } else if (!xmlStrcmp(node->name, (const xmlChar
> *)"Representation")) {
> > + ret = parse_manifest_representation(s, url, node,
> > + adaptionset_node,
> > + mpd_baseurl_node,
> > + period_baseurl_node,
> > + fragment_template_node,
> > + content_component_node,
> > +
> adaptionset_baseurl_node);
> > + if (ret < 0) {
> > + return ret;
> > + }
> > + }
> > + node = xmlNextElementSibling(node);
> > + }
> > + return 0;
> > +}
> > +
> > +
> > +static int parse_manifest(AVFormatContext *s, const char *url,
> AVIOContext *in)
> > +{
> > + DASHContext *c = s->priv_data;
> > + int ret = 0;
> > + int close_in = 0;
> > + uint8_t *new_url = NULL;
> > + int64_t filesize = 0;
> > + char *buffer = NULL;
> > + AVDictionary *opts = NULL;
> > + xmlDoc *doc = NULL;
> > + xmlNodePtr root_element = NULL;
> > + xmlNodePtr node = NULL;
> > + xmlNodePtr period_node = NULL;
> > + xmlNodePtr mpd_baseurl_node = NULL;
> > + xmlNodePtr period_baseurl_node = NULL;
> > + xmlNodePtr adaptionset_node = NULL;
> > + xmlAttrPtr attr = NULL;
> > + xmlChar *val = NULL;
> > + uint32_t perdiod_duration_sec = 0;
> > + uint32_t perdiod_start_sec = 0;
> > + int32_t audio_rep_idx = 0;
> > + int32_t video_rep_idx = 0;
> > +
> > + if (!in) {
> > + close_in = 1;
> > + /* This is XML manifest there is no need to set range header */
> > + av_dict_set(&opts, "seekable", "0", 0);
> > + // broker prior HTTP options that should be consistent across
> requests
> > + av_dict_set(&opts, "user-agent", c->user_agent, 0);
> > + av_dict_set(&opts, "cookies", c->cookies, 0);
> > + av_dict_set(&opts, "headers", c->headers, 0);
> > +
> > + ret = avio_open2(&in, url, AVIO_FLAG_READ,
> c->interrupt_callback, &opts);
> > + av_dict_free(&opts);
> > + if (ret < 0)
> > + return ret;
> > + }
> > +
> > + if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >=
> 0) {
> > + c->base_url = av_strdup(new_url);
> > + } else {
> > + c->base_url = av_strdup(url);
> > + }
> > +
> > + filesize = avio_size(in);
> > + if (filesize <= 0) {
> > + filesize = 8 * 1024;
> > + }
> > +
> > + buffer = av_mallocz(filesize);
> > + if (!buffer) {
> > + return AVERROR(ENOMEM);
> > + }
> > +
> > + filesize = avio_read(in, buffer, filesize);
> > + if (filesize > 0) {
> > + LIBXML_TEST_VERSION
> > +
> > + doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0);
> > + root_element = xmlDocGetRootElement(doc);
> > + node = root_element;
> > +
> > + if (!node) {
> > + ret = AVERROR_INVALIDDATA;
> > + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing
> root node\n", url);
> > + goto cleanup;
> > + }
> > +
> > + if (node->type != XML_ELEMENT_NODE ||
> > + xmlStrcmp(node->name, (const xmlChar *)"MPD")) {
> > + ret = AVERROR_INVALIDDATA;
> > + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root
> node name[%s] type[%d]\n", url, node->name, (int)node->type);
> > + goto cleanup;
> > + }
> > +
> > + val = xmlGetProp(node, "type");
> > + if (!val) {
> > + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing
> type attrib\n", url);
> > + ret = AVERROR_INVALIDDATA;
> > + goto cleanup;
> > + }
> > + if (!xmlStrcmp(val, (const xmlChar *)"dynamic"))
> > + c->is_live = 1;
> > + xmlFree(val);
> > +
> > + attr = node->properties;
> > + while (attr) {
> > + val = xmlGetProp(node, attr->name);
> > +
> > + if (!xmlStrcmp(attr->name, (const xmlChar
> *)"availabilityStartTime")) {
> > + c->availability_start_time_sec =
> get_utc_date_time_insec(s, (const char *)val);
> > + } else if (!xmlStrcmp(attr->name, (const xmlChar
> *)"publishTime")) {
> > + c->publish_time_sec = get_utc_date_time_insec(s, (const
> char *)val);
> > + } else if (!xmlStrcmp(attr->name, (const xmlChar
> *)"minimumUpdatePeriod")) {
> > + c->minimum_update_period_sec = get_duration_insec(s,
> (const char *)val);
> > + } else if (!xmlStrcmp(attr->name, (const xmlChar
> *)"timeShiftBufferDepth")) {
> > + c->time_shift_buffer_depth_sec = get_duration_insec(s,
> (const char *)val);
> > + } else if (!xmlStrcmp(attr->name, (const xmlChar
> *)"minBufferTime")) {
> > + c->min_buffer_time_sec = get_duration_insec(s, (const
> char *)val);
> > + } else if (!xmlStrcmp(attr->name, (const xmlChar
> *)"suggestedPresentationDelay")) {
> > + c->suggested_presentation_delay_sec =
> get_duration_insec(s, (const char *)val);
> > + } else if (!xmlStrcmp(attr->name, (const xmlChar
> *)"mediaPresentationDuration")) {
> > + c->media_presentation_duration_sec =
> get_duration_insec(s, (const char *)val);
> > + }
> > + attr = attr->next;
> > + xmlFree(val);
> > + }
> > +
> > + mpd_baseurl_node = find_child_node_by_name(node, "BaseURL");
> > +
> > + // at now we can handle only one period, with the longest
> duration
> > + node = xmlFirstElementChild(node);
> > + while (node) {
> > + if (!xmlStrcmp(node->name, (const xmlChar *)"Period")) {
> > + perdiod_duration_sec = 0;
> > + perdiod_start_sec = 0;
> > + attr = node->properties;
> > + while (attr) {
> > + val = xmlGetProp(node, attr->name);
> > + if (!xmlStrcmp(attr->name, (const xmlChar
> *)"duration")) {
> > + perdiod_duration_sec = get_duration_insec(s,
> (const char *)val);
> > + } else if (!xmlStrcmp(attr->name, (const xmlChar
> *)"start")) {
> > + perdiod_start_sec = get_duration_insec(s,
> (const char *)val);
> > + }
> > + attr = attr->next;
> > + xmlFree(val);
> > + }
> > + if ((perdiod_duration_sec) >= (c->period_duration_sec))
> {
> > + period_node = node;
> > + c->period_duration_sec = perdiod_duration_sec;
> > + c->period_start_sec = perdiod_start_sec;
> > + if (c->period_start_sec > 0)
> > + c->media_presentation_duration_sec =
> c->period_duration_sec;
> > + }
> > + }
> > + node = xmlNextElementSibling(node);
> > + }
> > + if (!period_node) {
> > + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing
> Period node\n", url);
> > + ret = AVERROR_INVALIDDATA;
> > + goto cleanup;
> > + }
> > + // explore AdaptationSet
> > + adaptionset_node = xmlFirstElementChild(period_node);
> > + while (adaptionset_node) {
> > + if (!xmlStrcmp(adaptionset_node->name, (const xmlChar
> *)"BaseURL")) {
> > + period_baseurl_node = adaptionset_node;
> > + } else if (!xmlStrcmp(adaptionset_node->name, (const
> xmlChar *)"AdaptationSet")) {
> > + parse_manifest_adaptationset(s, url, adaptionset_node,
> mpd_baseurl_node, period_baseurl_node);
> > + }
> > + adaptionset_node = xmlNextElementSibling(adaptionset_node);
> > + }
> > + if (c->cur_video) {
> > + c->cur_video->rep_count = video_rep_idx;
> > + c->cur_video->fix_multiple_stsd_order = 1;
> > + av_log(s, AV_LOG_VERBOSE, "rep_idx[%d]\n",
> (int)c->cur_video->rep_idx);
> > + av_log(s, AV_LOG_VERBOSE, "rep_count[%d]\n",
> (int)video_rep_idx);
> > + }
> > + if (c->cur_audio) {
> > + c->cur_audio->rep_count = audio_rep_idx;
> > + }
> > +
> > +cleanup:
> > + /*free the document */
> > + xmlFreeDoc(doc);
> > + xmlCleanupParser();
> > + } else {
> > + av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", url);
> > + ret = AVERROR_INVALIDDATA;
> > + }
> > +
> > + av_free(new_url);
> > + av_free(buffer);
> > + if (close_in) {
> > + avio_close(in);
> > + }
> > + return ret;
> > +}
> > +
> > +static int64_t calc_cur_seg_no(AVFormatContext *s, struct
> representation *pls)
> > +{
> > + DASHContext *c = pls->parent->priv_data;
> > + int64_t num = 0;
> > +
> > + if (c->is_live) {
> > + if (!pls->fragment_duration) {
> > + av_log(s, AV_LOG_ERROR, "Get not get fragment duration
> value in live mode\n");
> > + return pls->first_seq_no;
> > + }
> > + num = pls->first_seq_no + (((get_current_time_in_sec() -
> c->availability_start_time_sec) - c->presentation_delay_sec) *
> pls->fragment_timescale) / pls->fragment_duration;
> > + } else {
> > + num = pls->first_seq_no;
> > + }
> > + return num;
> > +}
> > +
> > +static int64_t calc_min_seg_no(AVFormatContext *s, struct
> representation *pls)
> > +{
> > + DASHContext *c = pls->parent->priv_data;
> > + int64_t num = 0;
> > +
> > + if (c->is_live) {
> > + if (!pls->fragment_duration) {
> > + av_log(s, AV_LOG_ERROR, "Get not get fragment duration
> value in live mode\n");
> > + return pls->first_seq_no;
> > + }
> > + num = pls->first_seq_no + (((get_current_time_in_sec() -
> c->availability_start_time_sec) - c->time_shift_buffer_depth_sec) *
> pls->fragment_timescale) / pls->fragment_duration;
> > + } else {
> > + num = pls->first_seq_no;
> > + }
> > + return num;
> > +}
> > +
> > +static int64_t calc_max_seg_no(AVFormatContext *s, struct
> representation *pls)
> > +{
> > + DASHContext *c = pls->parent->priv_data;
> > + int64_t num = 0;
> > + int64_t i = 0;
> > +
> > + if (c->is_live) {
> > + if (!pls->fragment_duration) {
> > + av_log(s, AV_LOG_ERROR, "Get not get fragment duration
> value in live mode\n");
> > + return pls->first_seq_no;
> > + }
> > + num = pls->first_seq_no + (((get_current_time_in_sec() -
> c->availability_start_time_sec)) * pls->fragment_timescale) /
> pls->fragment_duration;
> > + } else {
> > + if (pls->n_fragments) {
> > + num = pls->first_seq_no + pls->n_fragments - 1;
> > + } else if (pls->n_timelines) {
> > + num = pls->first_seq_no + pls->n_timelines - 1;
> > + for (i = 0; i < pls->n_timelines; ++i) {
> > + num += pls->timelines[i]->r;
> > + }
> > + } else {
> > + num = pls->first_seq_no + (c->media_presentation_duration_sec
> * pls->fragment_timescale) / pls->fragment_duration;
> > + }
> > + }
> > +
> > + return num;
> > +}
> > +
> > +static int64_t get_fragment_start_time(struct representation *pls,
> int64_t cur_seq_no)
> > +{
> > + int64_t i = 0;
> > + int64_t j = 0;
> > + int64_t num = 0;
> > + int64_t startTime = 0;
> > +
> > + if (pls->n_timelines) {
> > + for (i = 0; i < pls->n_timelines; ++i) {
> > + if (pls->timelines[i]->t > 0) {
> > + startTime = pls->timelines[i]->t;
> > + }
> > + if (num == cur_seq_no)
> > + goto finish;
> > + startTime += pls->timelines[i]->d;
> > + for (j = 0; j < pls->timelines[i]->r; ++j) {
> > + num++;
> > + if (num == cur_seq_no)
> > + goto finish;
> > + startTime += pls->timelines[i]->d;
> > + }
> > + num++;
> > + }
> > + }
> > +
> > +finish:
> > + return startTime;
> > +}
> > +
> > +static struct fragment *get_current_fragment(struct representation *pls)
> > +{
> > + int64_t tmp_val = 0;
> > + int64_t min_seq_no = 0;
> > + int64_t max_seq_no = 0;
> > + char buffer[1024];
> > + char *tmp_str = NULL;
> > + struct fragment *seg = NULL;
> > + struct fragment *seg_ptr = NULL;
> > + DASHContext *c = pls->parent->priv_data;
> > +
> > + if (pls->n_fragments > 0) {
> > + if (pls->cur_seq_no < pls->n_fragments) {
> > + seg_ptr = pls->fragments[pls->cur_seq_no];
> > + seg = av_mallocz(sizeof(struct fragment));
> > + if (!seg) {
> > + return NULL;
> > + }
> > + seg->url = av_strdup(seg_ptr->url);
> > + if (!seg->url) {
> > + av_free(seg);
> > + return NULL;
> > + }
> > + seg->size = seg_ptr->size;
> > + seg->url_offset = seg_ptr->url_offset;
> > + return seg;
> > + }
> > + }
> > + if (c->is_live) {
> > + while (1) {
> > + min_seq_no = calc_min_seg_no(pls->parent, pls);
> > + max_seq_no = calc_max_seg_no(pls->parent, pls);
> > +
> > + if (pls->cur_seq_no <= min_seq_no) {
> > + av_log(pls->parent, AV_LOG_VERBOSE, "old fragment:
> cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"], playlist %d\n",
> > + (int64_t)pls->cur_seq_no, min_seq_no,
> max_seq_no, (int)pls->rep_idx);
> > + pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls);
> > + } else if (pls->cur_seq_no > max_seq_no) {
> > + av_log(pls->parent, AV_LOG_VERBOSE, "new fragment:
> min[%"PRId64"] max[%"PRId64"], playlist %d\n",
> > + min_seq_no, max_seq_no, (int)pls->rep_idx);
> > + av_usleep(1000);
> > + continue;
> > + }
> > + break;
> > + }
> > + seg = av_mallocz(sizeof(struct fragment));
> > + if (!seg) {
> > + return NULL;
> > + }
> > + } else if (pls->cur_seq_no <= pls->last_seq_no) {
> > + seg = av_mallocz(sizeof(struct fragment));
> > + if (!seg) {
> > + return NULL;
> > + }
> > + }
> > + if (seg) {
> > + if (pls->tmp_url_type != TMP_URL_TYPE_UNSPECIFIED) {
> > + tmp_val = pls->tmp_url_type == TMP_URL_TYPE_NUMBER ?
> pls->cur_seq_no : get_fragment_start_time(pls, pls->cur_seq_no);
> > + if (av_get_frame_filename(buffer, sizeof(buffer),
> pls->url_template, (int64_t)tmp_val) < 0) {
> > + av_log(pls->parent, AV_LOG_ERROR, "Invalid segment
> filename template %s\n", pls->url_template);
> > + return NULL;
> > + }
> > +
> > + if (pls->tmp_url_type == TMP_URL_TYPE_NUMBER) {
> > + tmp_str = replace_template_str(buffer, "$Number$");
> > + } else if (pls->tmp_url_type == TMP_URL_TYPE_TIME) {
> > + tmp_str = replace_template_str(buffer, "$Time$");
> > + } else {
> > + av_log(pls->parent, AV_LOG_ERROR, "Invalid
> tmp_url_type\n");
> > + return NULL;
> > + }
> > +
> > + seg->url = av_strdup(tmp_str);
> > + if (!seg->url) {
> > + av_free(tmp_str);
> > + return NULL;
> > + }
> > + } else {
> > + av_log(pls->parent, AV_LOG_ERROR, "Unable to unable to
> resolve template url '%s'\n", pls->url_template);
> > + seg->url = av_strdup(pls->url_template);
> > + if (!seg->url) {
> > + return NULL;
> > + }
> > + }
> > + seg->size = -1;
> > + }
> > +
> > + av_free(tmp_str);
> > + return seg;
> > +}
> > +
> > +enum ReadFromURLMode {
> > + READ_NORMAL,
> > + READ_COMPLETE,
> > +};
> > +
> > +static int read_from_url(struct representation *pls, struct fragment
> *seg,
> > + uint8_t *buf, int buf_size,
> > + enum ReadFromURLMode mode)
> > +{
> > + int ret;
> > +
> > + /* limit read if the fragment was only a part of a file */
> > + if (seg->size >= 0)
> > + buf_size = FFMIN(buf_size, pls->cur_seg_size -
> pls->cur_seg_offset);
> > +
> > + if (mode == READ_COMPLETE) {
> > + ret = avio_read(pls->input, buf, buf_size);
> > + if (ret < buf_size) {
> > + av_log(pls->parent, AV_LOG_WARNING, "Could not read
> complete fragment.\n");
> > + }
> > + } else {
> > + ret = avio_read(pls->input, buf, buf_size);
> > + }
> > + if (ret > 0)
> > + pls->cur_seg_offset += ret;
> > +
> > + return ret;
> > +}
> > +
> > +static int open_input(DASHContext *c, struct representation *pls,
> struct fragment *seg)
> > +{
> > + AVDictionary *opts = NULL;
> > + char url[MAX_URL_SIZE];
> > + int ret;
> > +
> > + // broker prior HTTP options that should be consistent across
> requests
> > + av_dict_set(&opts, "user-agent", c->user_agent, 0);
> > + av_dict_set(&opts, "cookies", c->cookies, 0);
> > + av_dict_set(&opts, "headers", c->headers, 0);
> > + if (c->is_live) {
> > + av_dict_set(&opts, "seekable", "0", 0);
> > + }
> > +
> > + if (seg->size >= 0) {
> > + /* try to restrict the HTTP request to the part we want
> > + * (if this is in fact a HTTP request) */
> > + av_dict_set_int(&opts, "offset", seg->url_offset, 0);
> > + av_dict_set_int(&opts, "end_offset", seg->url_offset +
> seg->size, 0);
> > + }
> > +
> > + ff_make_absolute_url(url, MAX_URL_SIZE, c->base_url, seg->url);
> > + av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s',
> offset %"PRId64", playlist %d\n",
> > + url, seg->url_offset, pls->rep_idx);
> > + ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts,
> NULL);
> > + if (ret < 0) {
> > + goto cleanup;
> > + }
> > +
> > + /* Seek to the requested position. If this was a HTTP request, the
> offset
> > + * should already be where want it to, but this allows e.g. local
> testing
> > + * without a HTTP server. */
> > + if (!ret && seg->url_offset) {
> > + int64_t seekret = avio_seek(pls->input, seg->url_offset,
> SEEK_SET);
> > + if (seekret < 0) {
> > + av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset
> %"PRId64" of DASH fragment '%s'\n", seg->url_offset, seg->url);
> > + ret = (int) seekret;
> > + ff_format_io_close(pls->parent, &pls->input);
> > + }
> > + }
> > +
> > +cleanup:
> > + av_dict_free(&opts);
> > + pls->cur_seg_offset = 0;
> > + pls->cur_seg_size = seg->size;
> > + return ret;
> > +}
> > +
> > +static int update_init_section(struct representation *pls)
> > +{
> > + static const int max_init_section_size = 1024*1024;
> > + DASHContext *c = pls->parent->priv_data;
> > + int64_t sec_size = 0;
> > + int64_t urlsize = 0;
> > + int ret = 0;
> > +
> > + /* read init section only once per representation */
> > + if (!pls->init_section || pls->init_sec_buf) {
> > + return 0;
> > + }
> > +
> > + ret = open_input(c, pls, pls->init_section);
> > + if (ret < 0) {
> > + av_log(pls->parent, AV_LOG_WARNING, "Failed to open an
> initialization section in playlist %d\n", pls->rep_idx);
> > + return ret;
> > + }
> > +
> > + if (pls->init_section->size >= 0) {
> > + sec_size = pls->init_section->size;
> > + } else if ((urlsize = avio_size(pls->input)) >= 0) {
> > + sec_size = urlsize;
> > + } else {
> > + sec_size = max_init_section_size;
> > + }
> > + av_log(pls->parent, AV_LOG_DEBUG, "Downloading an initialization
> section of size %"PRId64"\n", sec_size);
> > + sec_size = FFMIN(sec_size, max_init_section_size);
> > + av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size,
> sec_size);
> > + ret = read_from_url(pls, pls->init_section, pls->init_sec_buf,
> pls->init_sec_buf_size, READ_COMPLETE);
> > + ff_format_io_close(pls->parent, &pls->input);
> > + if (ret < 0)
> > + return ret;
> > +
> > + if (pls->fix_multiple_stsd_order && pls->rep_idx > 0) {
> > + uint8_t **stsd_entries = NULL;
> > + int *stsd_entries_size = NULL;
> > + int i = 4;
> > +
> > + while (i <= (ret - 4)) {
> > + // find start stsd atom
> > + if (!memcmp(pls->init_sec_buf + i, "stsd", 4)) {
> > + /* 1B version
> > + * 3B flags
> > + * 4B num of entries */
> > + int stsd_first_offset = i + 8;
> > + int stsd_offset = 0;
> > + int j = 0;
> > + uint32_t stsd_count = AV_RB32(pls->init_sec_buf +
> stsd_first_offset);
> > + stsd_first_offset += 4;
> > + if (stsd_count != pls->rep_count) {
> > + i++;
> > + continue;
> > + }
> > + // find all stsd entries
> > + stsd_entries = av_mallocz_array(stsd_count,
> sizeof(*stsd_entries));
> > + stsd_entries_size = av_mallocz_array(stsd_count,
> sizeof(*stsd_entries_size));
> > + for (j = 0; j < stsd_count; ++j) {
> > + /* 4B - size
> > + * 4B - format */
> > + stsd_entries_size[j] = AV_RB32(pls->init_sec_buf +
> stsd_first_offset + stsd_offset);
> > + stsd_entries[j] = av_malloc(stsd_entries_size[j]);
> > + memcpy(stsd_entries[j], pls->init_sec_buf +
> stsd_first_offset + stsd_offset, stsd_entries_size[j]);
> > + stsd_offset += stsd_entries_size[j];
> > + }
> > + // reorder stsd entries
> > + // as first put stsd entry for current representation
> > + j = pls->rep_idx;
> > + stsd_offset = stsd_first_offset;
> > + memcpy(pls->init_sec_buf + stsd_offset,
> stsd_entries[j], stsd_entries_size[j]);
> > + stsd_offset += stsd_entries_size[j];
> > + for (j = 0; j < stsd_count; ++j) {
> > + if (j != pls->rep_idx) {
> > + memcpy(pls->init_sec_buf + stsd_offset,
> stsd_entries[j], stsd_entries_size[j]);
> > + stsd_offset += stsd_entries_size[j];
> > + }
> > + av_free(stsd_entries[j]);
> > + }
> > + av_freep(&stsd_entries);
> > + av_freep(&stsd_entries_size);
> > + break;
> > + }
> > + i++;
> > + }
> > + }
> > +
> > + av_log(pls->parent, AV_LOG_TRACE, "pls[%p] init section
> size[%d]\n", pls, (int)ret);
> > + pls->init_sec_data_len = ret;
> > + pls->init_sec_buf_read_offset = 0;
> > +
> > + return 0;
> > +}
> > +
> > +static int64_t seek_data(void *opaque, int64_t offset, int whence)
> > +{
> > + struct representation *v = opaque;
> > + if (v->n_fragments && !v->init_sec_data_len) {
> > + return avio_seek(v->input, offset, whence);
> > + }
> > +
> > + return AVERROR(ENOSYS);
> > +}
> > +
> > +static int read_data(void *opaque, uint8_t *buf, int buf_size)
> > +{
> > + int ret = 0;
> > + struct representation *v = opaque;
> > + DASHContext *c = v->parent->priv_data;
> > +
> > +restart:
> > + if (!v->input) {
> > + free_fragment(&v->cur_seg);
> > + v->cur_seg = get_current_fragment(v);
> > + if (!v->cur_seg) {
> > + ret = AVERROR_EOF;
> > + goto end;
> > + }
> > +
> > + /* load/update Media Initialization Section, if any */
> > + ret = update_init_section(v);
> > + if (ret)
> > + goto end;
> > +
> > + ret = open_input(c, v, v->cur_seg);
> > + if (ret < 0) {
> > + if (ff_check_interrupt(c->interrupt_callback)) {
> > + goto end;
> > + ret = AVERROR_EXIT;
> > + }
> > + av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment
> of playlist %d\n", v->rep_idx);
> > + v->cur_seq_no++;
> > + goto restart;
> > + }
> > + }
> > +
> > + if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
> > + /* Push init section out first before first actual fragment */
> > + int copy_size = FFMIN(v->init_sec_data_len -
> v->init_sec_buf_read_offset, buf_size);
> > + memcpy(buf, v->init_sec_buf, copy_size);
> > + v->init_sec_buf_read_offset += copy_size;
> > + ret = copy_size;
> > + goto end;
> > + }
> > +
> > + /* check the v->cur_seg, if it is null, get current and double
> check if the new v->cur_seg*/
> > + if (!v->cur_seg) {
> > + v->cur_seg = get_current_fragment(v);
> > + }
> > + if (!v->cur_seg) {
> > + ret = AVERROR_EOF;
> > + goto end;
> > + }
> > + ret = read_from_url(v, v->cur_seg, buf, buf_size, READ_NORMAL);
> > + if (ret > 0)
> > + goto end;
> > + ff_format_io_close(v->parent, &v->input);
> > + v->cur_seq_no++;
> > + goto restart;
> > +
> > +end:
> > + return ret;
> > +}
> > +
> > +static int save_avio_options(AVFormatContext *s)
> > +{
> > + DASHContext *c = s->priv_data;
> > + const char *opts[] = { "headers", "user_agent", "user-agent",
> "cookies", NULL }, **opt = opts;
> > + uint8_t *buf = NULL;
> > + int ret = 0;
> > +
> > + while (*opt) {
> > + if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0)
> {
> > + if (buf) {
> > + ret = av_dict_set(&c->avio_opts, *opt, buf,
> AV_DICT_DONT_STRDUP_VAL);
> > + if (ret < 0)
> > + return ret;
> > + }
> > + }
> > + opt++;
> > + }
> > +
> > + return ret;
> > +}
> > +
> > +static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const
> char *url,
> > + int flags, AVDictionary **opts)
> > +{
> > + av_log(s, AV_LOG_ERROR,
> > + "A HDS playlist item '%s' referred to an external file '%s'.
> "
> > + "Opening this file was forbidden for security reasons\n",
> > + s->filename, url);
> > + return AVERROR(EPERM);
> > +}
> > +
> > +static int reopen_demux_for_component(AVFormatContext *s, struct
> representation *pls)
> > +{
> > + DASHContext *c = s->priv_data;
> > + AVInputFormat *in_fmt = NULL;
> > + AVDictionary *in_fmt_opts = NULL;
> > + uint8_t *avio_ctx_buffer = NULL;
> > + int ret = 0;
> > +
> > + if (pls->ctx) {
> > + /* note: the internal buffer could have changed, and be !=
> avio_ctx_buffer */
> > + av_freep(&pls->pb.buffer);
> > + memset(&pls->pb, 0x00, sizeof(AVIOContext));
> > + pls->ctx->pb = NULL;
> > + avformat_close_input(&pls->ctx);
> > + pls->ctx = NULL;
> > + }
> > + if (!(pls->ctx = avformat_alloc_context())) {
> > + ret = AVERROR(ENOMEM);
> > + goto fail;
> > + }
> > +
> > + avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
> > + if (!avio_ctx_buffer ) {
> > + ret = AVERROR(ENOMEM);
> > + avformat_free_context(pls->ctx);
> > + pls->ctx = NULL;
> > + goto fail;
> > + }
> > + if (c->is_live) {
> > + ffio_init_context(&pls->pb, avio_ctx_buffer ,
> INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL);
> > + } else {
> > + ffio_init_context(&pls->pb, avio_ctx_buffer ,
> INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data);
> > + }
> > + pls->pb.seekable = 0;
> > +
> > + if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
> > + goto fail;
> > +
> > + pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
> > + pls->ctx->probesize = 1024 * 4;
> > + pls->ctx->max_analyze_duration = 4 * AV_TIME_BASE;
> > + ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
> > + if (ret < 0) {
> > + av_log(s, AV_LOG_ERROR, "Error when loading first fragment,
> playlist %d\n", (int)pls->rep_idx);
> > + avformat_free_context(pls->ctx);
> > + pls->ctx = NULL;
> > + goto fail;
> > + }
> > +
> > + pls->ctx->pb = &pls->pb;
> > + pls->ctx->io_open = nested_io_open;
> > +
> > + // provide additional information from mpd if available
> > + ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts);
> //pls->init_section->url
> > + av_dict_free(&in_fmt_opts);
> > + if (ret < 0)
> > + goto fail;
> > + if (pls->n_fragments) {
> > + ret = avformat_find_stream_info(pls->ctx, NULL);
> > + if (ret < 0)
> > + goto fail;
> > + }
> > +
> > +fail:
> > + return ret;
> > +}
> > +
> > +static int open_demux_for_component(AVFormatContext *s, struct
> representation *pls)
> > +{
> > + int ret = 0;
> > + int i;
> > +
> > + pls->parent = s;
> > + pls->cur_seq_no = calc_cur_seg_no(s, pls);
> > + pls->last_seq_no = calc_max_seg_no(s, pls);
> > +
> > + ret = reopen_demux_for_component(s, pls);
> > + if (ret < 0) {
> > + goto fail;
> > + }
> > + for (i = 0; i < pls->ctx->nb_streams; i++) {
> > + AVStream *st = avformat_new_stream(s, NULL);
> > + AVStream *ist = pls->ctx->streams[i];
> > + if (!st) {
> > + ret = AVERROR(ENOMEM);
> > + goto fail;
> > + }
> > + st->id = i;
> > + avcodec_parameters_copy(st->codecpar,
> pls->ctx->streams[i]->codecpar);
> > + avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num,
> ist->time_base.den);
> > + }
> > +
> > + return 0;
> > +fail:
> > + return ret;
> > +}
> > +
> > +static int dash_read_header(AVFormatContext *s)
> > +{
> > + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
> > + DASHContext *c = s->priv_data;
> > + int ret = 0;
> > + int stream_index = 0;
> > +
> > + c->interrupt_callback = &s->interrupt_callback;
> > + // if the URL context is good, read important options we must
> broker later
> > + if (u) {
> > + update_options(&c->user_agent, "user-agent", u);
> > + update_options(&c->cookies, "cookies", u);
> > + update_options(&c->headers, "headers", u);
> > + }
> > +
> > + if ((ret = parse_manifest(s, s->filename, s->pb)) < 0)
> > + goto fail;
> > +
> > + if ((ret = save_avio_options(s)) < 0)
> > + goto fail;
> > +
> > + /* If this isn't a live stream, fill the total duration of the
> > + * stream. */
> > + if (!c->is_live) {
> > + s->duration = (int64_t) c->media_presentation_duration_sec *
> AV_TIME_BASE;
> > + }
> > +
> > + /* Open the demuxer for curent video and current audio components
> if available */
> > + if (!ret && c->cur_video) {
> > + ret = open_demux_for_component(s, c->cur_video);
> > + if (!ret) {
> > + c->cur_video->stream_index = stream_index;
> > + ++stream_index;
> > + } else {
> > + free_representation(c->cur_video);
> > + c->cur_video = NULL;
> > + }
> > + }
> > +
> > + if (!ret && c->cur_audio) {
> > + ret = open_demux_for_component(s, c->cur_audio);
> > + if (!ret) {
> > + c->cur_audio->stream_index = stream_index;
> > + ++stream_index;
> > + } else {
> > + free_representation(c->cur_audio);
> > + c->cur_audio = NULL;
> > + }
> > + }
> > +
> > + if (!stream_index) {
> > + ret = AVERROR_INVALIDDATA;
> > + goto fail;
> > + }
> > +
> > + /* Create a program */
> > + if (!ret) {
> > + AVProgram *program;
> > + program = av_new_program(s, 0);
> > + if (!program) {
> > + goto fail;
> > + }
> > +
> > + if (c->cur_video) {
> > + av_program_add_stream_index(s, 0,
> c->cur_video->stream_index);
> > + }
> > +
> > + if (c->cur_audio) {
> > + av_program_add_stream_index(s, 0,
> c->cur_audio->stream_index);
> > + }
> > + }
> > +
> > + return 0;
> > +fail:
> > + return ret;
> > +}
> > +
> > +static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
> > +{
> > + DASHContext *c = s->priv_data;
> > + int ret = 0;
> > + struct representation *cur = NULL;
> > +
> > + if (!c->cur_audio && !c->cur_video) {
> > + return AVERROR_INVALIDDATA;
> > + }
> > + if (c->cur_audio && !c->cur_video) {
> > + cur = c->cur_audio;
> > + } else if (!c->cur_audio && c->cur_video) {
> > + cur = c->cur_video;
> > + } else if (c->cur_video->cur_timestamp <
> c->cur_audio->cur_timestamp) {
> > + cur = c->cur_video;
> > + } else {
> > + cur = c->cur_audio;
> > + }
> > +
> > + if (cur->ctx) {
> > + ret = av_read_frame(cur->ctx, &cur->pkt);
> > + if (ret < 0) {
> > + av_packet_unref(&cur->pkt);
> > + } else {
> > + /* If we got a packet, return it */
> > + *pkt = cur->pkt;
> > + cur->cur_timestamp = av_rescale(pkt->pts,
> (int64_t)cur->ctx->streams[0]->time_base.num * 90000,
> cur->ctx->streams[0]->time_base.den);
> > + pkt->stream_index = cur->stream_index;
> > + reset_packet(&cur->pkt);
> > + return 0;
> > + }
> > + }
> > + return AVERROR_EOF;
> > +}
> > +
> > +static int dash_close(AVFormatContext *s)
> > +{
> > + DASHContext *c = s->priv_data;
> > +
> > + if (c->cur_audio) {
> > + free_representation(c->cur_audio);
> > + }
> > +
> > + if (c->cur_video) {
> > + free_representation(c->cur_video);
> > + }
> > +
> > + av_freep(&c->cookies);
> > + av_freep(&c->user_agent);
> > + av_dict_free(&c->avio_opts);
> > + av_freep(&c->base_url);
> > + return 0;
> > +}
> > +
> > +static int dash_seek(AVFormatContext *s, struct representation *pls,
> int64_t seek_pos_msec, int flags)
> > +{
> > + int ret = 0;
> > + int i = 0;
> > + int j = 0;
> > + int64_t duration = 0;
> > +
> > + av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms],
> playlist %d\n", seek_pos_msec, pls->rep_idx);
> > +
> > + // single fragment mode
> > + if (pls->n_fragments) {
> > + pls->cur_timestamp = 0;
> > + pls->cur_seg_offset = 0;
> > + ff_read_frame_flush(pls->ctx);
> > + return av_seek_frame(pls->ctx, -1, seek_pos_msec*1000, flags);
> > + }
> > +
> > + if (pls->input)
> > + ff_format_io_close(pls->parent, &pls->input);
> > +
> > + // find the nearest fragment
> > + if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
> > + int64_t num = pls->first_seq_no;
> > + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with
> SegmentTimeline start n_timelines[%d] last_seq_no[%"PRId64"], playlist
> %d.\n",
> > + (int)pls->n_timelines, (int64_t)pls->last_seq_no,
> (int)pls->rep_idx);
> > + for (i = 0; i < pls->n_timelines; i++) {
> > + if (pls->timelines[i]->t > 0) {
> > + duration = pls->timelines[i]->t;
> > + }
> > + duration += pls->timelines[i]->d;
> > + if (seek_pos_msec < ((duration * 1000) /
> pls->fragment_timescale)) {
> > + goto set_seq_num;
> > + }
> > + for (j = 0; j < pls->timelines[i]->r; j++) {
> > + duration += pls->timelines[i]->d;
> > + num++;
> > + if (seek_pos_msec < ((duration * 1000) /
> pls->fragment_timescale)) {
> > + goto set_seq_num;
> > + }
> > + }
> > + num++;
> > + }
> > +
> > +set_seq_num:
> > + pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no :
> num;
> > + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with
> SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n",
> > + (int64_t)pls->cur_seq_no, (int)pls->rep_idx);
> > + } else if (pls->fragment_duration > 0) {
> > + pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec *
> pls->fragment_timescale) / pls->fragment_duration) / 1000;
> > + } else {
> > + av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing
> fragment_duration\n");
> > + pls->cur_seq_no = pls->first_seq_no;
> > + }
> > + pls->cur_timestamp = 0;
> > + pls->cur_seg_offset = 0;
> > + pls->init_sec_buf_read_offset = 0;
> > + ret = reopen_demux_for_component(s, pls);
> > +
> > + return ret;
> > +}
> > +
> > +static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t
> timestamp, int flags)
> > +{
> > + int ret = 0;
> > + DASHContext *c = s->priv_data;
> > + int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
> > + s->streams[stream_index]->tim
> e_base.den,
> > + flags & AVSEEK_FLAG_BACKWARD
> ?
> > + AV_ROUND_DOWN : AV_ROUND_UP);
> > + if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
> > + return AVERROR(ENOSYS);
> > + if (c->cur_audio) {
> > + ret = dash_seek(s, c->cur_audio, seek_pos_msec, flags);
> > + }
> > + if (!ret && c->cur_video) {
> > + ret = dash_seek(s, c->cur_video, seek_pos_msec, flags);
> > + }
> > + return ret;
> > +}
> > +
> > +static int dash_probe(AVProbeData *p)
> > +{
> > + if (!av_stristr(p->buf, "<MPD"))
> > + return 0;
> > +
> > + if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
> > + av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
> > + av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
> > + av_stristr(p->buf, "dash:profile:isoff-main:2011")) {
> > + return AVPROBE_SCORE_MAX;
> > + }
> > + if (av_stristr(p->buf, "dash:profile")) {
> > + return AVPROBE_SCORE_MAX >> 1;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +#define OFFSET(x) offsetof(DASHContext, x)
> > +#define FLAGS AV_OPT_FLAG_DECODING_PARAM
> > +static const AVOption dash_options[] = {
> > + {NULL}
> > +};
> > +
> > +static const AVClass dash_class = {
> > + .class_name = "dash",
> > + .item_name = av_default_item_name,
> > + .option = dash_options,
> > + .version = LIBAVUTIL_VERSION_INT,
> > +};
> > +
> > +AVInputFormat ff_dash_demuxer = {
> > + .name = "dash",
> > + .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming
> over HTTP"),
> > + .priv_class = &dash_class,
> > + .priv_data_size = sizeof(DASHContext),
> > + .read_probe = dash_probe,
> > + .read_header = dash_read_header,
> > + .read_packet = dash_read_packet,
> > + .read_close = dash_close,
> > + .read_seek = dash_read_seek,
> > + .flags = AVFMT_NO_BYTE_SEEK,
> > +};
>
> You seem to have a relatively clean separation between parsing the
> manifest, its memory representation, and using it. It would probably be
> good if you could move the parsing code to a separate source file, to
> make the whole thing more readable. (That's just a suggestion.)
>
Yes, this is a base version, and i will optimizing the code readability if
the patch can applied into ffmpeg :)
>
> Also, I hope that strreplace function was the only case where you
> copied something from somewhere else without attribution and checking
> the license.
>
> Can't comment on the DASH mechanics.
>
> (I don't know if these things came up in earlier review.)
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
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