You're still calling snprintf with a string derived from the XML, which is still not safe. Rather than having a format copied from the source in get_repl_pattern_and_format, you should have a fixed value of something like `"%0*"PRId64`, and specify an additional "precision" argument you parse from the XML yourself. I can't reiterate this enough: _never pass data from the XML into the format-string arg of a printf-family function_.
Also, rather than calling snprintf() twice with an av_malloc() in between, you can just call av_asprintf(). That's what it does internally anyway. > On Aug 27, 2017, at 09:19, Steven Liu <l...@chinaffmpeg.org> wrote: > > ffmpeg need a dash demuxer for demux the dash formats base on > https://github.com/samsamsam-iptvplayer/exteplayer3/blob/master/tmp/ffmpeg/patches/3.2.2/000001_add_dash_demux.patch > > TODO: > 1. support multi bitrate dash > > v2 fixed: > 1. from autodetect to disabled > 2. from camelCase code style to ffmpeg code style > 3. from RepType to AVMediaType > 4. fix variable typo > 5. change time value from uint32_t to uint64_t > 6. removed be used once API > 7. change 'time(NULL)`, except it is not 2038-safe.' to av_gettime and > av_timegm > 8. merge complex free operation to free_fragment > 9. use API from snprintf to av_asprintf > > v3 fixed: > 1. fix typo from --enabled-xml2 to --enable-xml2 > > v4 fixed: > 1. from --enable-xml2 to --enable-libxml2 > 2. move system includes to top > 3. remove nouse includes > 4. rename enum name > 5. add a trailing comma for the last entry enum > 6. fix comment typo > 7. add const to DASHContext class front > 8. check sscanf if return arguments and give warning message when error > 9. check validity before free seg->url and seg > 10. check if the val is null, before use atoll > > v5 fixed: > 1. fix typo from mainifest to manifest > > v6 fixed: > 1. from realloc to av_realloc > 2. from free to av_free > > v7 fixed: > 1. remove the -lxml2 from configure when require_pkg_config > > v8 fixed: > 1. fix replace filename template by av_asprintf secure problem > > v9 modified: > 1. make manifest parser clearly > > v10 fixed: > 1. fix function API name code style > 2. remove redundant strreplace call > 3. remove redundant memory operation and check return value from > get_content_url() > 4. add space between ) and { > 5. remove no need to log the value for print > > v11 fixed: > 1. from atoll to strtoll > > v12 fixed: > 1. remove strreplace and instead by av_strreplace > > v13 fixed: > 1. fix bug: cannot play: > http://dash.edgesuite.net/akamai/bbb_30fps/bbb_30fps.mpd > > v14 fixed: > 1. fix bug: TLS connection was non-properly terminated > 2. fix bug: No trailing CRLF found in HTTP header > > v15 fixed: > 1. play youtube link: ffmpeg -i $(youtube-dl -J > "https://www.youtube.com/watch?v=XmL19DOP_Ls"; | jq -r > ".requested_formats[0].manifest_url") > 2. code refine for timeline living stream > > 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> > Reviewed-by: wm4 <nfx...@googlemail.com> > Tested-by: Andy Furniss <adf.li...@gmail.com> > Reported-by: Andy Furniss <adf.li...@gmail.com> > Signed-off-by: Steven Liu <l...@chinaffmpeg.org> > Signed-off-by: samsamsam <samsam...@o2.pl> > --- > configure | 4 + > libavformat/Makefile | 1 + > libavformat/allformats.c | 2 +- > libavformat/dashdec.c | 1981 ++++++++++++++++++++++++++++++++++++++++++++++ > 4 files changed, 1987 insertions(+), 1 deletion(-) > create mode 100644 libavformat/dashdec.c > > diff --git a/configure b/configure > index 05f6dcc99a..7a7d61fa13 100755 > --- a/configure > +++ b/configure > @@ -272,6 +272,7 @@ External library support: > --enable-libxcb-shape enable X11 grabbing shape rendering [autodetect] > --enable-libxvid enable Xvid encoding via xvidcore, > native MPEG-4/Xvid encoder exists [no] > + --enable-libxml2 enable XML parsing using the C library libxml2 > [no] > --enable-libzimg enable z.lib, needed for zscale filter [no] > --enable-libzmq enable message passing via libzmq [no] > --enable-libzvbi enable teletext support via libzvbi [no] > @@ -1576,6 +1577,7 @@ EXTERNAL_LIBRARY_LIST=" > libvpx > libwavpack > libwebp > + libxml2 > libzimg > libzmq > libzvbi > @@ -2937,6 +2939,7 @@ 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" > @@ -5996,6 +5999,7 @@ enabled openssl && { use_pkg_config openssl > openssl/ssl.h OPENSSL_init > check_lib openssl openssl/ssl.h > SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 || > die "ERROR: openssl not found"; } > enabled qtkit_indev && { check_header_objcc QTKit/QTKit.h || disable > qtkit_indev; } > +enabled libxml2 && require_pkg_config libxml-2.0 > libxml2/libxml/xmlversion.h xmlCheckVersion > > if enabled gcrypt; then > GCRYPT_CONFIG="${cross_prefix}libgcrypt-config" > diff --git a/libavformat/Makefile b/libavformat/Makefile > index f2b465cfa2..3d478749d0 100644 > --- a/libavformat/Makefile > +++ b/libavformat/Makefile > @@ -133,6 +133,7 @@ OBJS-$(CONFIG_CRC_MUXER) += crcenc.o > OBJS-$(CONFIG_DATA_DEMUXER) += rawdec.o > OBJS-$(CONFIG_DATA_MUXER) += rawenc.o > OBJS-$(CONFIG_DASH_MUXER) += 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 cd8200ea1c..aeb9b710fe 100644 > --- a/libavformat/allformats.c > +++ b/libavformat/allformats.c > @@ -96,7 +96,7 @@ static void register_all(void) > REGISTER_DEMUXER (CINE, cine); > REGISTER_DEMUXER (CONCAT, concat); > REGISTER_MUXER (CRC, crc); > - REGISTER_MUXER (DASH, dash); > + REGISTER_MUXDEMUX(DASH, dash); > REGISTER_MUXDEMUX(DATA, data); > REGISTER_MUXDEMUX(DAUD, daud); > REGISTER_DEMUXER (DCSTR, dcstr); > diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c > new file mode 100644 > index 0000000000..4718ce24ab > --- /dev/null > +++ b/libavformat/dashdec.c > @@ -0,0 +1,1981 @@ > +/* > + * 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; > + char *url_template_pattern; > + char *url_template_format; > + 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 start_number; /* used in case when we have dynamic list of > segment to know which segments are new one*/ > + > + int64_t fragment_duration; > + int64_t fragment_timescale; > + > + int64_t presentation_timeoffset; > + > + int64_t cur_seq_no; > + int64_t cur_seg_offset; > + int64_t cur_seg_size; > + struct fragment *cur_seg; > + > + /* Currently active Media Initialization Section */ > + struct fragment *init_section; > + uint8_t *init_sec_buf; > + uint32_t init_sec_buf_size; > + uint32_t init_sec_data_len; > + uint32_t init_sec_buf_read_offset; > + int fix_multiple_stsd_order; > + int64_t cur_timestamp; > + int is_restart_needed; > +}; > + > +typedef struct DASHContext { > + const AVClass *class; > + char *base_url; > + struct representation *cur_video; > + struct representation *cur_audio; > + > + /* MediaPresentationDescription Attribute */ > + uint64_t media_presentation_duration; > + uint64_t suggested_presentation_delay; > + uint64_t availability_start_time; > + uint64_t publish_time; > + uint64_t minimum_update_period; > + uint64_t time_shift_buffer_depth; > + uint64_t min_buffer_time; > + > + /* Period Attribute */ > + uint64_t period_duration; > + uint64_t period_start; > + > + int is_live; > + AVIOInterruptCB *interrupt_callback; > + char *user_agent; ///< holds HTTP user agent set as > an AVOption to the HTTP protocol context > + char *cookies; ///< holds HTTP cookie values set > in either the initial response or as an AVOption to the HTTP protocol context > + char *headers; ///< holds HTTP headers set as an > AVOption to the HTTP protocol context > + AVDictionary *avio_opts; > +} DASHContext; > + > +static uint64_t get_current_time_in_sec(void) > +{ > + return av_gettime() / 1000000; > +} > + > +static uint64_t get_utc_date_time_insec(AVFormatContext *s, const char > *datetime) > +{ > + struct tm timeinfo; > + int year = 0; > + int month = 0; > + int day = 0; > + int hour = 0; > + int minute = 0; > + int ret = 0; > + float second = 0.0; > + > + /* ISO-8601 date parser */ > + if (!datetime) > + return 0; > + > + ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, > &minute, &second); > + /* year, month, day, hour, minute, second 6 arguments */ > + if (ret != 6) { > + av_log(s, AV_LOG_WARNING, "get_utc_date_time_insec get a wrong time > format\n"); > + } > + timeinfo.tm_year = year - 1900; > + timeinfo.tm_mon = month - 1; > + timeinfo.tm_mday = day; > + timeinfo.tm_hour = hour; > + timeinfo.tm_min = minute; > + timeinfo.tm_sec = (int)second; > + > + return av_timegm(&timeinfo); > +} > + > +static uint32_t get_duration_insec(AVFormatContext *s, const char *duration) > +{ > + /* ISO-8601 duration parser */ > + uint32_t days = 0; > + uint32_t hours = 0; > + uint32_t mins = 0; > + uint32_t secs = 0; > + 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 int64_t get_segment_start_time_based_on_timeline(struct > representation *pls, int64_t cur_seq_no) > +{ > + int64_t start_time = 0; > + int64_t i = 0; > + int64_t j = 0; > + int64_t num = 0; > + > + if (pls->n_timelines) { > + for (i = 0; i < pls->n_timelines; i++) { > + if (pls->timelines[i]->t > 0) { > + start_time = pls->timelines[i]->t; > + } > + if (num == cur_seq_no) > + goto finish; > + > + start_time += pls->timelines[i]->d; > + for (j = 0; j < pls->timelines[i]->r; j++) { > + num++; > + if (num == cur_seq_no) > + goto finish; > + start_time += pls->timelines[i]->d; > + } > + num++; > + } > + } > +finish: > + return start_time; > +} > + > +static int64_t calc_next_seg_no_from_timelines(struct representation *pls, > int64_t cur_time) > +{ > + int64_t i = 0; > + int64_t j = 0; > + int64_t num = 0; > + int64_t start_time = 0; > + > + for (i = 0; i < pls->n_timelines; i++) { > + if (pls->timelines[i]->t > 0) { > + start_time = pls->timelines[i]->t; > + } > + if (start_time > cur_time) > + goto finish; > + > + start_time += pls->timelines[i]->d; > + for (j = 0; j < pls->timelines[i]->r; j++) { > + num++; > + if (start_time > cur_time) > + goto finish; > + start_time += pls->timelines[i]->d; > + } > + num++; > + } > + > + return -1; > + > +finish: > + return num; > +} > + > +static void free_fragment(struct fragment **seg) > +{ > + if (!(*seg)) { > + return; > + } > + av_freep(&(*seg)->url); > + av_freep(seg); > +} > + > +static void free_fragment_list(struct representation *pls) > +{ > + int i; > + > + for (i = 0; i < pls->n_fragments; i++) { > + free_fragment(&pls->fragments[i]); > + } > + av_freep(&pls->fragments); > + pls->n_fragments = 0; > +} > + > +static void free_timelines_list(struct representation *pls) > +{ > + int i; > + > + for (i = 0; i < pls->n_timelines; i++) { > + av_freep(&pls->timelines[i]); > + } > + av_freep(&pls->timelines); > + pls->n_timelines = 0; > +} > + > +static void free_representation(struct representation *pls) > +{ > + free_fragment_list(pls); > + free_timelines_list(pls); > + free_fragment(&pls->cur_seg); > + free_fragment(&pls->init_section); > + av_freep(&pls->init_sec_buf); > + av_freep(&pls->pb.buffer); > + if (pls->input) > + ff_format_io_close(pls->parent, &pls->input); > + if (pls->ctx) { > + pls->ctx->pb = NULL; > + avformat_close_input(&pls->ctx); > + } > + > + av_free(pls->url_template_pattern); > + av_free(pls->url_template_format); > + 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; > + void *p = NULL; > + > + av_dict_copy(&tmp, opts, 0); > + av_dict_copy(&tmp, opts2, 0); > + > + if (av_strstart(url, "crypto", NULL)) { > + if (url[6] == '+' || url[6] == ':') > + proto_name = avio_find_protocol_name(url + 7); > + } > + > + if (!proto_name) > + proto_name = avio_find_protocol_name(url); > + > + if (!proto_name) > + return AVERROR_INVALIDDATA; > + > + // only http(s) & file are allowed > + if (!av_strstart(proto_name, "http", NULL) && !av_strstart(proto_name, > "file", NULL)) { > + return AVERROR_INVALIDDATA; > + } > + if (!strncmp(proto_name, url, strlen(proto_name)) && > url[strlen(proto_name)] == ':') { > + ; > + } else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url > + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':') { > + ; > + } else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5)) { > + return AVERROR_INVALIDDATA; > + } > + ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp); > + if (ret >= 0) { > + // update cookies on http response with setcookies. > + p = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb; > + update_options(&c->cookies, "cookies", p); > + av_dict_set(&opts, "cookies", c->cookies, 0); > + } > + > + av_dict_free(&tmp); > + > + if (is_http) > + *is_http = av_strstart(proto_name, "http", NULL); > + > + return ret; > + > +} > + > +static char *get_content_url(xmlNodePtr *baseurl_nodes, > + int n_baseurl_nodes, > + 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 = av_strireplace(tmp_str, "$RepresentationID$", (const > char*)rep_id_val); > + av_free(tmp_str); > + tmp_str = url; > + } > + if (rep_bandwidth_val && tmp_str) > + url = av_strireplace(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 int get_repl_pattern_and_format(const char *i_url, const char > *i_marker, char **o_pattern, char **o_format) > +{ > + int ret = -1; > + int marker_len = 0; > + int format_len = 0; > + char *prefix = NULL; > + char *start = NULL; > + char *end = NULL; > + > + > + if (av_stristr(i_url, i_marker)) { > + *o_pattern = av_strdup(i_marker); > + *o_format = av_strdup("%"PRId64); > + ret = 0; > + } else { > + prefix = av_strdup(i_marker); > + marker_len = strlen(prefix)-1; > + prefix[marker_len] = '\0'; > + start = av_stristr(i_url, prefix); > + if (!start) > + goto finish; > + > + end = strchr(start + 1, '$'); > + if (!end) > + goto finish; > + > + if (start[marker_len] != '%') > + goto finish; > + > + if (end[-1] != 'd') > + goto finish; > + > + format_len = end - start - marker_len - 1 + strlen(PRId64); > + *o_format = av_mallocz(format_len+1); > + av_strlcpy(*o_format, start + marker_len, end - start - marker_len > -1); > + av_strlcat(*o_format, PRId64, strlen(*o_format) + strlen(PRId64)); > + *o_pattern = av_mallocz(end - start + 2); > + if (*o_pattern) { > + ret = AVERROR(EINVAL); > + goto finish; > + } > + av_strlcpy(*o_pattern, start, end - start + 1); > + ret = 0; > + > +finish: > + av_free(prefix); > + } > + > + return ret; > +} > + > +static enum AVMediaType get_content_type(xmlNodePtr node) > +{ > + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN; > + int i = 0; > + const char *attr; > + xmlChar *val = NULL; > + > + if (node) { > + while (type == AVMEDIA_TYPE_UNKNOWN && i < 2) { > + attr = (i) ? "mimeType" : "contentType"; > + val = xmlGetProp(node, attr); > + if (val) { > + if (av_stristr((const char *)val, "video")) { > + type = AVMEDIA_TYPE_VIDEO; > + } else if (av_stristr((const char *)val, "audio")) { > + type = AVMEDIA_TYPE_AUDIO; > + } > + 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 *presentation_timeoffset_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"); > + > + baseurl_nodes[0] = mpd_baseurl_node; > + baseurl_nodes[1] = period_baseurl_node; > + baseurl_nodes[2] = adaptionset_baseurl_node; > + baseurl_nodes[3] = representation_baseurl_node; > + > + if (representation_segmenttemplate_node || fragment_template_node) { > + fragment_timeline_node = NULL; > + fragment_templates_tab[0] = representation_segmenttemplate_node; > + fragment_templates_tab[1] = fragment_template_node; > + > + presentation_timeoffset_val = > get_val_from_nodes_tab(fragment_templates_tab, 2, "presentationTimeOffset"); > + duration_val = get_val_from_nodes_tab(fragment_templates_tab, 2, > "duration"); > + startnumber_val = get_val_from_nodes_tab(fragment_templates_tab, > 2, "startNumber"); > + timescale_val = get_val_from_nodes_tab(fragment_templates_tab, > 2, "timescale"); > + initialization_val = > get_val_from_nodes_tab(fragment_templates_tab, 2, "initialization"); > + media_val = get_val_from_nodes_tab(fragment_templates_tab, 2, > "media"); > + > + if (initialization_val) { > + rep->init_section = av_mallocz(sizeof(struct fragment)); > + if (!rep->init_section) { > + av_free(rep); > + ret = AVERROR(ENOMEM); > + goto end; > + } > + rep->init_section->url = get_content_url(baseurl_nodes, 4, > rep_id_val, rep_bandwidth_val, initialization_val); > + if (!rep->init_section->url) { > + av_free(rep->init_section); > + av_free(rep); > + ret = AVERROR(ENOMEM); > + goto end; > + } > + rep->init_section->size = -1; > + 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")) { > + get_repl_pattern_and_format(temp_string, "$Number$", > &(rep->url_template_pattern), &(rep->url_template_format)); > + rep->tmp_url_type = TMP_URL_TYPE_NUMBER; /* > Number-Based. */ > + } else if (av_stristr(temp_string, "$Time")) { > + get_repl_pattern_and_format(temp_string, "$Time$", > &(rep->url_template_pattern), &(rep->url_template_format)); > + rep->tmp_url_type = TMP_URL_TYPE_TIME; /* > Time-Based. */ > + } else { > + temp_string = NULL; > + } > + } > + xmlFree(media_val); > + } > + > + if (presentation_timeoffset_val) { > + rep->presentation_timeoffset = (int64_t) > strtoll(presentation_timeoffset_val, NULL, 10); > + xmlFree(presentation_timeoffset_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_segmentlist_node) { > + // TODO: > https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html > + // > http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full > + xmlNodePtr fragmenturl_node = NULL; > + duration_val = xmlGetProp(representation_segmentlist_node, > "duration"); > + timescale_val = xmlGetProp(representation_segmentlist_node, > "timescale"); > + if (duration_val) { > + rep->fragment_duration = (int64_t) strtoll(duration_val, > NULL, 10); > + xmlFree(duration_val); > + } > + if (timescale_val) { > + rep->fragment_timescale = (int64_t) strtoll(timescale_val, > NULL, 10); > + xmlFree(timescale_val); > + } > + fragmenturl_node = > xmlFirstElementChild(representation_segmentlist_node); > + while (fragmenturl_node) { > + ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node, > + baseurl_nodes, > + rep_id_val, > + rep_bandwidth_val); > + if (ret < 0) { > + return ret; > + } > + fragmenturl_node = xmlNextElementSibling(fragmenturl_node); > + } > + > + fragment_timeline_node = > find_child_node_by_name(representation_segmenttemplate_node, > "SegmentTimeline"); > + > + if (!fragment_timeline_node) > + fragment_timeline_node = > find_child_node_by_name(fragment_template_node, "SegmentTimeline"); > + if (fragment_timeline_node) { > + fragment_timeline_node = > xmlFirstElementChild(fragment_timeline_node); > + while (fragment_timeline_node) { > + ret = parse_manifest_segmenttimeline(s, rep, > fragment_timeline_node); > + if (ret < 0) { > + return ret; > + } > + fragment_timeline_node = > xmlNextElementSibling(fragment_timeline_node); > + } > + } > + } else { > + free_representation(rep); > + rep = NULL; > + av_log(s, AV_LOG_ERROR, "Unknown format of Representation node > id[%s] \n", (const char *)rep_id_val); > + } > + > + if (rep) { > + if (rep->fragment_duration > 0 && !rep->fragment_timescale) > + rep->fragment_timescale = 1; > + if (type == AVMEDIA_TYPE_VIDEO) { > + rep->rep_idx = video_rep_idx; > + c->cur_video = rep; > + } else { > + rep->rep_idx = audio_rep_idx; > + c->cur_audio = rep; > + } > + } > + } > + > + video_rep_idx += type == AVMEDIA_TYPE_VIDEO; > + audio_rep_idx += type == AVMEDIA_TYPE_AUDIO; > + > +end: > + if (rep_id_val) > + 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 = get_utc_date_time_insec(s, > (const char *)val); > + } else if (!xmlStrcmp(attr->name, (const xmlChar > *)"publishTime")) { > + c->publish_time = get_utc_date_time_insec(s, (const char > *)val); > + } else if (!xmlStrcmp(attr->name, (const xmlChar > *)"minimumUpdatePeriod")) { > + c->minimum_update_period = get_duration_insec(s, (const char > *)val); > + } else if (!xmlStrcmp(attr->name, (const xmlChar > *)"timeShiftBufferDepth")) { > + c->time_shift_buffer_depth = get_duration_insec(s, (const > char *)val); > + } else if (!xmlStrcmp(attr->name, (const xmlChar > *)"minBufferTime")) { > + c->min_buffer_time = get_duration_insec(s, (const char > *)val); > + } else if (!xmlStrcmp(attr->name, (const xmlChar > *)"suggestedPresentationDelay")) { > + c->suggested_presentation_delay = get_duration_insec(s, > (const char *)val); > + } else if (!xmlStrcmp(attr->name, (const xmlChar > *)"mediaPresentationDuration")) { > + c->media_presentation_duration = 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)) { > + period_node = node; > + c->period_duration = perdiod_duration_sec; > + c->period_start = perdiod_start_sec; > + if (c->period_start > 0) > + c->media_presentation_duration = c->period_duration; > + } > + } > + node = xmlNextElementSibling(node); > + } > + if (!period_node) { > + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period > node\n", url); > + ret = AVERROR_INVALIDDATA; > + goto cleanup; > + } > + > + adaptionset_node = xmlFirstElementChild(period_node); > + while (adaptionset_node) { > + if (!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 = s->priv_data; > + int64_t num = 0; > + int64_t start_time_offset = 0; > + > + if (c->is_live) { > + if (pls->n_fragments) { > + num = pls->first_seq_no; > + } else if (pls->n_timelines) { > + start_time_offset = > get_segment_start_time_based_on_timeline(pls, 0xFFFFFFFF) - > pls->timelines[pls->first_seq_no]->t; // total duration of playlist > + if (start_time_offset < 60 * pls->fragment_timescale) > + start_time_offset = 0; > + else > + start_time_offset = start_time_offset - 60 * > pls->fragment_timescale; > + > + num = calc_next_seg_no_from_timelines(pls, > pls->timelines[pls->first_seq_no]->t + start_time_offset); > + if (num == -1) > + num = pls->first_seq_no; > + } else { > + if (pls->presentation_timeoffset) { > + num = pls->presentation_timeoffset * pls->fragment_timescale > / pls->fragment_duration; > + } else if (c->publish_time > 0) { > + num = pls->first_seq_no + (((c->publish_time - > c->availability_start_time) - c->suggested_presentation_delay) * > pls->fragment_timescale) / pls->fragment_duration; > + } else { > + num = pls->first_seq_no + (((get_current_time_in_sec() - > c->availability_start_time) - c->suggested_presentation_delay) * > pls->fragment_timescale) / pls->fragment_duration; > + } > + } > + } else { > + num = pls->first_seq_no; > + } > + return num; > +} > + > +static int64_t calc_min_seg_no(AVFormatContext *s, struct representation > *pls) > +{ > + DASHContext *c = s->priv_data; > + int64_t num = 0; > + > + if (c->is_live && pls->fragment_duration) { > + num = pls->first_seq_no + (((get_current_time_in_sec() - > c->availability_start_time) - c->time_shift_buffer_depth) * > pls->fragment_timescale) / pls->fragment_duration; > + } else { > + num = pls->first_seq_no; > + } > + return num; > +} > + > +static int64_t calc_max_seg_no(struct representation *pls) > +{ > + DASHContext *c = pls->parent->priv_data; > + int64_t num = 0; > + > + if (pls->n_fragments) { > + num = pls->first_seq_no + pls->n_fragments - 1; > + } else if (pls->n_timelines) { > + int i = 0; > + num = pls->first_seq_no + pls->n_timelines - 1; > + for (i = 0; i < pls->n_timelines; i++) { > + num += pls->timelines[i]->r; > + } > + } else if (c->is_live) { > + num = pls->first_seq_no + (((get_current_time_in_sec() - > c->availability_start_time)) * pls->fragment_timescale) / > pls->fragment_duration; > + } else { > + num = pls->first_seq_no + (c->media_presentation_duration * > pls->fragment_timescale) / pls->fragment_duration; > + } > + > + return num; > +} > + > +static void move_timelines(struct representation *rep_src, struct > representation *rep_dest) > +{ > + if (rep_dest && rep_src ) { > + free_timelines_list(rep_dest); > + rep_dest->timelines = rep_src->timelines; > + rep_dest->n_timelines = rep_src->n_timelines; > + rep_dest->first_seq_no = rep_src->first_seq_no; > + rep_dest->last_seq_no = calc_max_seg_no(rep_dest); > + rep_src->timelines = NULL; > + rep_src->n_timelines = 0; > + rep_dest->cur_seq_no = rep_src->cur_seq_no; > + } > +} > + > +static void move_segments(struct representation *rep_src, struct > representation *rep_dest) > +{ > + if (rep_dest && rep_src ) { > + free_fragment_list(rep_dest); > + if (rep_src->start_number > (rep_dest->start_number + > rep_dest->n_fragments)) > + rep_dest->cur_seq_no = 0; > + else > + rep_dest->cur_seq_no += rep_src->start_number - > rep_dest->start_number; > + rep_dest->fragments = rep_src->fragments; > + rep_dest->n_fragments = rep_src->n_fragments; > + rep_dest->parent = rep_src->parent; > + rep_dest->last_seq_no = calc_max_seg_no(rep_dest); > + rep_src->fragments = NULL; > + rep_src->n_fragments = 0; > + } > +} > + > + > +static int refresh_manifest(AVFormatContext *s) > +{ > + > + int ret = 0; > + DASHContext *c = s->priv_data; > + > + // save current context > + struct representation *cur_video = c->cur_video; > + struct representation *cur_audio = c->cur_audio; > + char *base_url = c->base_url; > + > + c->base_url = NULL; > + c->cur_video = NULL; > + c->cur_audio = NULL; > + ret = parse_manifest(s, s->filename, NULL); > + if (ret) > + goto finish; > + > + if (cur_video && cur_video->timelines || cur_audio && > cur_audio->timelines) { > + // calc current time > + int64_t currentVideoTime = 0; > + int64_t currentAudioTime = 0; > + if (cur_video && cur_video->timelines) > + currentVideoTime = > get_segment_start_time_based_on_timeline(cur_video, cur_video->cur_seq_no) / > cur_video->fragment_timescale; > + if (cur_audio && cur_audio->timelines) > + currentAudioTime = > get_segment_start_time_based_on_timeline(cur_audio, cur_audio->cur_seq_no) / > cur_audio->fragment_timescale; > + // update segments > + if (cur_video && cur_video->timelines) { > + c->cur_video->cur_seq_no = > calc_next_seg_no_from_timelines(c->cur_video, currentVideoTime * > cur_video->fragment_timescale - 1); > + if (c->cur_video->cur_seq_no >= 0) { > + move_timelines(c->cur_video, cur_video); > + } > + } > + if (cur_audio && cur_audio->timelines) { > + c->cur_audio->cur_seq_no = > calc_next_seg_no_from_timelines(c->cur_audio, currentAudioTime * > cur_audio->fragment_timescale - 1); > + if (c->cur_audio->cur_seq_no >= 0) { > + move_timelines(c->cur_audio, cur_audio); > + } > + } > + } > + if (cur_video && cur_video->fragments) { > + move_segments(c->cur_video, cur_video); > + } > + if (cur_audio && cur_audio->fragments) { > + move_segments(c->cur_audio, cur_audio); > + } > + > +finish: > + // restore context > + if (c->base_url) > + av_free(base_url); > + else > + c->base_url = base_url; > + if (c->cur_audio) > + free_representation(c->cur_audio); > + if (c->cur_video) > + free_representation(c->cur_video); > + c->cur_audio = cur_audio; > + c->cur_video = cur_video; > + return ret; > +} > + > +static struct fragment *get_current_fragment(struct representation *pls) > +{ > + int64_t min_seq_no = 0; > + int64_t max_seq_no = 0; > + struct fragment *seg = NULL; > + struct fragment *seg_ptr = NULL; > + DASHContext *c = pls->parent->priv_data; > + > + while (( !ff_check_interrupt(c->interrupt_callback)&& pls->n_fragments > > 0)) { > + if (pls->cur_seq_no < pls->n_fragments) { > + seg_ptr = pls->fragments[pls->cur_seq_no]; > + seg = av_mallocz(sizeof(struct fragment)); > + if (!seg) { > + return NULL; > + } > + seg->url = av_strdup(seg_ptr->url); > + if (!seg->url) { > + av_free(seg); > + return NULL; > + } > + seg->size = seg_ptr->size; > + seg->url_offset = seg_ptr->url_offset; > + return seg; > + } else if (c->is_live) { > + av_usleep(1000*1000); > + refresh_manifest(pls->parent); > + } else { > + break; > + } > + } > + if (c->is_live) { > + while (!ff_check_interrupt(c->interrupt_callback)) { > + min_seq_no = calc_min_seg_no(pls->parent, pls); > + max_seq_no = calc_max_seg_no(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); > + if (c->is_live && (pls->timelines || pls->fragments)) { > + refresh_manifest(pls->parent); > + } > + 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*1000); > + if (c->is_live && (pls->timelines || pls->fragments)) { > + refresh_manifest(pls->parent); > + } > + 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) { > + int64_t val = pls->tmp_url_type == TMP_URL_TYPE_NUMBER ? > pls->cur_seq_no : get_segment_start_time_based_on_timeline(pls, > pls->cur_seq_no); > + int size = snprintf(NULL, 0, pls->url_template_format, val); // > calc needed buffer size > + > + if (size > 0) { > + char *tmp_val = av_mallocz(size + 1); > + snprintf(tmp_val, size+1, pls->url_template_format, val); > + seg->url = av_strireplace(pls->url_template, > pls->url_template_pattern, tmp_val); > + av_free(tmp_val); > + } > + } > + > + if (!seg->url) { > + av_log(pls->parent, AV_LOG_ERROR, "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; > + } > + > + 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; > + > + if (!v->is_restart_needed) > + v->cur_seq_no++; > + v->is_restart_needed = 1; > + > +/* > + 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[0] != '\0') { > + ret = av_dict_set(&c->avio_opts, *opt, buf, > AV_DICT_DONT_STRDUP_VAL); > + if (ret < 0) > + return ret; > + } > + } > + opt++; > + } > + > + return ret; > +} > + > +static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char > *url, > + int flags, AVDictionary **opts) > +{ > + av_log(s, AV_LOG_ERROR, > + "A DASH playlist item '%s' referred to an external file '%s'. " > + "Opening this file was forbidden for security reasons\n", > + s->filename, url); > + return AVERROR(EPERM); > +} > + > +static int reopen_demux_for_component(AVFormatContext *s, struct > representation *pls) > +{ > + DASHContext *c = s->priv_data; > + AVInputFormat *in_fmt = NULL; > + AVDictionary *in_fmt_opts = NULL; > + uint8_t *avio_ctx_buffer = NULL; > + int ret = 0; > + > + if (pls->ctx) { > + /* note: the internal buffer could have changed, and be != > avio_ctx_buffer */ > + av_freep(&pls->pb.buffer); > + memset(&pls->pb, 0x00, sizeof(AVIOContext)); > + pls->ctx->pb = NULL; > + avformat_close_input(&pls->ctx); > + pls->ctx = NULL; > + } > + if (!(pls->ctx = avformat_alloc_context())) { > + ret = AVERROR(ENOMEM); > + goto fail; > + } > + > + avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE); > + if (!avio_ctx_buffer ) { > + ret = AVERROR(ENOMEM); > + avformat_free_context(pls->ctx); > + pls->ctx = NULL; > + goto fail; > + } > + if (c->is_live) { > + ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, > 0, pls, read_data, NULL, NULL); > + } else { > + ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, > 0, pls, read_data, NULL, seek_data); > + } > + pls->pb.seekable = 0; > + > + if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0) > + goto fail; > + > + pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO; > + pls->ctx->probesize = 1024 * 4; > + pls->ctx->max_analyze_duration = 4 * AV_TIME_BASE; > + ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0); > + if (ret < 0) { > + av_log(s, AV_LOG_ERROR, "Error when loading first fragment, playlist > %d\n", (int)pls->rep_idx); > + avformat_free_context(pls->ctx); > + pls->ctx = NULL; > + goto fail; > + } > + > + pls->ctx->pb = &pls->pb; > + pls->ctx->io_open = nested_io_open; > + > + // provide additional information from mpd if available > + ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); > //pls->init_section->url > + av_dict_free(&in_fmt_opts); > + if (ret < 0) > + goto fail; > + if (pls->n_fragments) { > + ret = avformat_find_stream_info(pls->ctx, NULL); > + if (ret < 0) > + goto fail; > + } > + > +fail: > + return ret; > +} > + > +static int open_demux_for_component(AVFormatContext *s, struct > representation *pls) > +{ > + int ret = 0; > + int i; > + > + pls->parent = s; > + pls->cur_seq_no = calc_cur_seg_no(s, pls); > + pls->last_seq_no = calc_max_seg_no(pls); > + > + ret = reopen_demux_for_component(s, pls); > + if (ret < 0) { > + goto fail; > + } > + for (i = 0; i < pls->ctx->nb_streams; i++) { > + AVStream *st = avformat_new_stream(s, NULL); > + AVStream *ist = pls->ctx->streams[i]; > + if (!st) { > + ret = AVERROR(ENOMEM); > + goto fail; > + } > + st->id = i; > + avcodec_parameters_copy(st->codecpar, > pls->ctx->streams[i]->codecpar); > + avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, > ist->time_base.den); > + } > + > + return 0; > +fail: > + return ret; > +} > + > +static int dash_read_header(AVFormatContext *s) > +{ > + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb; > + DASHContext *c = s->priv_data; > + int ret = 0; > + int stream_index = 0; > + > + c->interrupt_callback = &s->interrupt_callback; > + // if the URL context is good, read important options we must broker > later > + if (u) { > + update_options(&c->user_agent, "user-agent", u); > + update_options(&c->cookies, "cookies", u); > + update_options(&c->headers, "headers", u); > + } > + > + if ((ret = parse_manifest(s, s->filename, s->pb)) < 0) > + goto fail; > + > + if ((ret = save_avio_options(s)) < 0) > + goto fail; > + > + /* If this isn't a live stream, fill the total duration of the > + * stream. */ > + if (!c->is_live) { > + s->duration = (int64_t) c->media_presentation_duration * > AV_TIME_BASE; > + } > + > + /* Open the demuxer for curent video and current audio components if > available */ > + if (!ret && c->cur_video) { > + ret = open_demux_for_component(s, c->cur_video); > + if (!ret) { > + c->cur_video->stream_index = stream_index; > + ++stream_index; > + } else { > + free_representation(c->cur_video); > + c->cur_video = NULL; > + } > + } > + > + if (!ret && c->cur_audio) { > + ret = open_demux_for_component(s, c->cur_audio); > + if (!ret) { > + c->cur_audio->stream_index = stream_index; > + ++stream_index; > + } else { > + free_representation(c->cur_audio); > + c->cur_audio = NULL; > + } > + } > + > + if (!stream_index) { > + ret = AVERROR_INVALIDDATA; > + goto fail; > + } > + > + /* Create a program */ > + if (!ret) { > + AVProgram *program; > + program = av_new_program(s, 0); > + if (!program) { > + goto fail; > + } > + > + if (c->cur_video) { > + av_program_add_stream_index(s, 0, c->cur_video->stream_index); > + } > + if (c->cur_audio) { > + av_program_add_stream_index(s, 0, c->cur_audio->stream_index); > + } > + } > + > + return 0; > +fail: > + return ret; > +} > + > +static int dash_read_packet(AVFormatContext *s, AVPacket *pkt) > +{ > + DASHContext *c = s->priv_data; > + int ret = 0; > + struct representation *cur = NULL; > + > + if (!c->cur_audio && !c->cur_video ) { > + return AVERROR_INVALIDDATA; > + } > + if (c->cur_audio && !c->cur_video) { > + cur = c->cur_audio; > + } else if (!c->cur_audio && c->cur_video) { > + cur = c->cur_video; > + } else if (c->cur_video->cur_timestamp < c->cur_audio->cur_timestamp) { > + cur = c->cur_video; > + } else { > + cur = c->cur_audio; > + } > + > + if (cur->ctx) { > + while (!ff_check_interrupt(c->interrupt_callback) && !ret) { > + ret = av_read_frame(cur->ctx, pkt); > + if (ret >= 0) { > + /* If we got a packet, return it */ > + cur->cur_timestamp = av_rescale(pkt->pts, > (int64_t)cur->ctx->streams[0]->time_base.num * 90000, > cur->ctx->streams[0]->time_base.den); > + pkt->stream_index = cur->stream_index; > + return 0; > + } > + if (cur->is_restart_needed) { > + while (!ff_check_interrupt(c->interrupt_callback)) { > + cur->cur_seg_offset = 0; > + cur->init_sec_buf_read_offset = 0; > + if (cur->input) > + ff_format_io_close(cur->parent, &cur->input); > + ret = reopen_demux_for_component(s, cur); > + if (c->is_live && ret) { > + av_usleep(1000*1000); > + continue; > + } > + break; > + } > + cur->is_restart_needed = 0; > + } > + > + } > + } > + return AVERROR_EOF; > +} > + > +static int dash_close(AVFormatContext *s) > +{ > + DASHContext *c = s->priv_data; > + if (c->cur_audio) { > + free_representation(c->cur_audio); > + } > + if (c->cur_video) { > + free_representation(c->cur_video); > + } > + > + av_freep(&c->cookies); > + av_freep(&c->user_agent); > + av_dict_free(&c->avio_opts); > + av_freep(&c->base_url); > + return 0; > +} > + > +static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t > seek_pos_msec, int flags) > +{ > + int ret = 0; > + int i = 0; > + int j = 0; > + int64_t duration = 0; > + > + av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], > playlist %d\n", seek_pos_msec, pls->rep_idx); > + > + // single fragment mode > + if (pls->n_fragments == 1) { > + pls->cur_timestamp = 0; > + pls->cur_seg_offset = 0; > + ff_read_frame_flush(pls->ctx); > + return av_seek_frame(pls->ctx, -1, seek_pos_msec * 1000, flags); > + } > + > + if (pls->input) > + ff_format_io_close(pls->parent, &pls->input); > + > + // find the nearest fragment > + if (pls->n_timelines > 0 && pls->fragment_timescale > 0) { > + int64_t num = pls->first_seq_no; > + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline > start n_timelines[%d] " > + "last_seq_no[%"PRId64"], playlist %d.\n", > + (int)pls->n_timelines, (int64_t)pls->last_seq_no, > (int)pls->rep_idx); > + for (i = 0; i < pls->n_timelines; i++) { > + if (pls->timelines[i]->t > 0) { > + duration = pls->timelines[i]->t; > + } > + duration += pls->timelines[i]->d; > + if (seek_pos_msec < ((duration * 1000) / > pls->fragment_timescale)) { > + goto set_seq_num; > + } > + for (j = 0; j < pls->timelines[i]->r; j++) { > + duration += pls->timelines[i]->d; > + num++; > + if (seek_pos_msec < ((duration * 1000) / > pls->fragment_timescale)) { > + goto set_seq_num; > + } > + } > + num++; > + } > + > +set_seq_num: > + pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num; > + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline > end cur_seq_no[%"PRId64"], playlist %d.\n", > + (int64_t)pls->cur_seq_no, (int)pls->rep_idx); > + } else if (pls->fragment_duration > 0) { > + pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * > pls->fragment_timescale) / pls->fragment_duration) / 1000; > + } else { > + av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing > fragment_duration\n"); > + pls->cur_seq_no = pls->first_seq_no; > + } > + pls->cur_timestamp = 0; > + pls->cur_seg_offset = 0; > + pls->init_sec_buf_read_offset = 0; > + ret = reopen_demux_for_component(s, pls); > + > + return ret; > +} > + > +static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t > timestamp, int flags) > +{ > + int ret = 0; > + DASHContext *c = s->priv_data; > + int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000, > + > s->streams[stream_index]->time_base.den, > + flags & AVSEEK_FLAG_BACKWARD ? > + AV_ROUND_DOWN : AV_ROUND_UP); > + if ((flags & AVSEEK_FLAG_BYTE) || c->is_live) > + return AVERROR(ENOSYS); > + if (c->cur_audio) { > + ret = dash_seek(s, c->cur_audio, seek_pos_msec, flags); > + } > + if (!ret && c->cur_video) { > + ret = dash_seek(s, c->cur_video, seek_pos_msec, flags); > + } > + return ret; > +} > + > +static int dash_probe(AVProbeData *p) > +{ > + if (!av_stristr(p->buf, "<MPD")) > + return 0; > + > + if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") || > + av_stristr(p->buf, "dash:profile:isoff-live:2011") || > + av_stristr(p->buf, "dash:profile:isoff-live:2012") || > + av_stristr(p->buf, "dash:profile:isoff-main:2011")) { > + return AVPROBE_SCORE_MAX; > + } > + if (av_stristr(p->buf, "dash:profile")) { > + return AVPROBE_SCORE_MAX / 2; > + } > + > + return 0; > +} > + > +#define OFFSET(x) offsetof(DASHContext, x) > +#define FLAGS AV_OPT_FLAG_DECODING_PARAM > +static const AVOption dash_options[] = { > + {NULL} > +}; > + > +static const AVClass dash_class = { > + .class_name = "dash", > + .item_name = av_default_item_name, > + .option = dash_options, > + .version = LIBAVUTIL_VERSION_INT, > +}; > + > +AVInputFormat ff_dash_demuxer = { > + .name = "dash", > + .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over > HTTP"), > + .priv_class = &dash_class, > + .priv_data_size = sizeof(DASHContext), > + .read_probe = dash_probe, > + .read_header = dash_read_header, > + .read_packet = dash_read_packet, > + .read_close = dash_close, > + .read_seek = dash_read_seek, > + .flags = AVFMT_NO_BYTE_SEEK, > +}; > -- > 2.11.0 (Apple Git-81) > > > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
