2017-03-22 22:36 GMT+08:00 Rodger Combs <rodger.co...@gmail.com>:
>
> > On Mar 22, 2017, at 09:31, Steven Liu <lingjiujia...@gmail.com> wrote:
> >
> > 2017-03-22 22:01 GMT+08:00 Rodger Combs <rodger.co...@gmail.com <mailto:
> rodger.co...@gmail.com>>:
> >
> >>
> >>> On Mar 21, 2017, at 08:16, 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
> >>>
> >>> 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 | 1841 ++++++++++++++++++++++++++++++
> >> ++++++++++++++++
> >>> 4 files changed, 1847 insertions(+), 1 deletion(-)
> >>> create mode 100644 libavformat/dashdec.c
> >>>
> >>> diff --git a/configure b/configure
> >>> index 4eb116b..86d16a8 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]
> >>> @@ -1590,6 +1591,7 @@ EXTERNAL_LIBRARY_LIST="
> >>> libvpx
> >>> libwavpack
> >>> libwebp
> >>> + libxml2
> >>> libzimg
> >>> libzmq
> >>> libzvbi
> >>> @@ -2920,6 +2922,7 @@ 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"
> >>> @@ -5920,6 +5923,7 @@ 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 -lxml2
> >>>
> >>> # 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..e0be85e
> >>> --- /dev/null
> >>> +++ b/libavformat/dashdec.c
> >>> @@ -0,0 +1,1841 @@
> >>> +/*
> >>> + * 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).
> >>> + * */
> >>> + int32_t r;
> >>> + /* d: Element or Attribute Name
> >>> + * specifies the Segment duration, in units of the value of the
> >> @timescale.
> >>> + * */
> >>> + int64_t d;
> >>> +};
> >>> +
> >>> +enum DASHTmplUrlType {
> >>> + TMP_URL_TYPE_UNSPECIFIED,
> >>> + TMP_URL_TYPE_NUMBER,
> >>> + TMP_URL_TYPE_TIME,
> >>> +};
> >>> +
> >>> +/*
> >>> + * Each playlist has its own demuxer. If it is currently active,
> >>> + * it has an opened AVIOContext too, and potentially an AVPacket
> >>> + * containing the next packet from this stream.
> >>> + */
> >>> +struct representation {
> >>> + char *url_template;
> >>> + enum DASHTmplUrlType tmp_url_type;
> >>> + AVIOContext pb;
> >>> + AVIOContext *input;
> >>> + AVFormatContext *parent;
> >>> + AVFormatContext *ctx;
> >>> + AVPacket pkt;
> >>> + int rep_idx;
> >>> + int rep_count;
> >>> + int stream_index;
> >>> +
> >>> + enum AVMediaType type;
> >>> + int64_t target_duration;
> >>> +
> >>> + int n_fragments;
> >>> + struct fragment **fragments; /* VOD list of fragment for profile
> */
> >>> +
> >>> + int n_timelines;
> >>> + struct timeline **timelines;
> >>> +
> >>> + int64_t first_seq_no;
> >>> + int64_t last_seq_no;
> >>> +
> >>> + int64_t fragment_duration;
> >>> + int64_t fragment_timescale;
> >>> +
> >>> + int64_t cur_seq_no;
> >>> + int64_t cur_seg_offset;
> >>> + int64_t cur_seg_size;
> >>> + struct fragment *cur_seg;
> >>> +
> >>> + /* Currently active Media Initialization Section */
> >>> + struct fragment *init_section;
> >>> + uint8_t *init_sec_buf;
> >>> + uint32_t init_sec_buf_size;
> >>> + uint32_t init_sec_data_len;
> >>> + uint32_t init_sec_buf_read_offset;
> >>> + int fix_multiple_stsd_order;
> >>> + int64_t cur_timestamp;
> >>> +};
> >>> +
> >>> +typedef struct DASHContext {
> >>> + const AVClass *class;
> >>> + char *base_url;
> >>> + struct representation *cur_video;
> >>> + struct representation *cur_audio;
> >>> + uint64_t media_presentation_duration_sec;
> >>> + uint64_t suggested_presentation_delay_sec;
> >>> + uint64_t presentation_delay_sec;
> >>> + uint64_t availability_start_time_sec;
> >>> + uint64_t publish_time_sec;
> >>> + uint64_t minimum_update_period_sec;
> >>> + uint64_t time_shift_buffer_depth_sec;
> >>> + uint64_t min_buffer_time_sec;
> >>> + uint64_t period_duration_sec;
> >>> + uint64_t period_start_sec;
> >>> + int is_live;
> >>> + int audio_rep_index;
> >>> + int video_rep_index;
> >>> + AVIOInterruptCB *interrupt_callback;
> >>> + char *user_agent; ///< holds HTTP user agent
> set
> >> as an AVOption to the HTTP protocol context
> >>> + char *cookies; ///< holds HTTP cookie values
> >> set in either the initial response or as an AVOption to the HTTP
> protocol
> >> context
> >>> + char *headers; ///< holds HTTP headers set
> as
> >> an AVOption to the HTTP protocol context
> >>> + AVDictionary *avio_opts;
> >>> +} DASHContext;
> >>> +
> >>> +static uint64_t GetCurrentTimeInSec(void)
> >>> +{
> >>> + return av_gettime() / 1000000;
> >>> +}
> >>> +
> >>> +static uint64_t GetUTCDateTimeInSec(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, "GetUTCDateTimeInSec get a wrong
> time
> >> format\n");
> >>> + // return 0; /* parser error */
> >>> + }
> >>> + timeinfo.tm_year = year - 1900;
> >>> + timeinfo.tm_mon = month - 1;
> >>> + timeinfo.tm_mday = day;
> >>> + timeinfo.tm_hour = hour;
> >>> + timeinfo.tm_min = minute;
> >>> + timeinfo.tm_sec = (int)second;
> >>> +
> >>> + return av_timegm(&timeinfo);
> >>> +}
> >>> +
> >>> +static uint32_t GetDurationInSec(AVFormatContext *s, const char
> >> *duration)
> >>> +{
> >>> + /* ISO-8601 duration parser */
> >>> + uint32_t days = 0;
> >>> + uint32_t hours = 0;
> >>> + uint32_t mins = 0;
> >>> + uint32_t secs = 0;
> >>> + uint32_t size = 0;
> >>> + float value = 0;
> >>> + uint8_t type = 0;
> >>> + const char *ptr = duration;
> >>> +
> >>> + while (*ptr) {
> >>> + if (*ptr == 'P' || *ptr == 'T') {
> >>> + ptr++;
> >>> + continue;
> >>> + }
> >>> +
> >>> + if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) {
> >>> + av_log(s, AV_LOG_WARNING, "GetDurationInSec get a wrong
> >> time format\n");
> >>> + return 0; /* parser error */
> >>> + }
> >>> + switch (type) {
> >>> + case 'D':
> >>> + days = (uint32_t)value;
> >>> + break;
> >>> + case 'H':
> >>> + hours = (uint32_t)value;
> >>> + break;
> >>> + case 'M':
> >>> + mins = (uint32_t)value;
> >>> + break;
> >>> + case 'S':
> >>> + secs = (uint32_t)value;
> >>> + break;
> >>> + default:
> >>> + // handle invalid type
> >>> + break;
> >>> + }
> >>> + ptr += size;
> >>> + }
> >>> + return ((days * 24 + hours) * 60 + mins) * 60 + secs;
> >>> +}
> >>> +
> >>> +static void free_fragment(struct fragment **seg)
> >>> +{
> >>> + if (!(*seg)) {
> >>> + return;
> >>> + }
> >>> + av_freep(&(*seg)->url);
> >>> + av_freep(seg);
> >>> +}
> >>> +
> >>> +static void free_fragment_list(struct representation *pls)
> >>> +{
> >>> + int i;
> >>> +
> >>> + for (i = 0; i < pls->n_fragments; i++) {
> >>> + free_fragment(&pls->fragments[i]);
> >>> + }
> >>> + av_freep(&pls->fragments);
> >>> + pls->n_fragments = 0;
> >>> +}
> >>> +
> >>> +static void free_timelines_list(struct representation *pls)
> >>> +{
> >>> + int i;
> >>> +
> >>> + for (i = 0; i < pls->n_timelines; i++) {
> >>> + av_freep(&pls->timelines[i]);
> >>> + }
> >>> + av_freep(&pls->timelines);
> >>> + pls->n_timelines = 0;
> >>> +}
> >>> +
> >>> +/*
> >>> + * Used to reset a statically allocated AVPacket to a clean slate,
> >>> + * containing no data.
> >>> + */
> >>> +static void reset_packet(AVPacket *pkt)
> >>> +{
> >>> + av_init_packet(pkt);
> >>> + pkt->data = NULL;
> >>> +}
> >>> +
> >>> +static void free_representation(struct representation *pls)
> >>> +{
> >>> + free_fragment_list(pls);
> >>> + free_timelines_list(pls);
> >>> + free_fragment(&pls->cur_seg);
> >>> + free_fragment(&pls->init_section);
> >>> + av_freep(&pls->init_sec_buf);
> >>> + av_packet_unref(&pls->pkt);
> >>> + reset_packet(&pls->pkt);
> >>> + av_freep(&pls->pb.buffer);
> >>> + if (pls->input)
> >>> + ff_format_io_close(pls->parent, &pls->input);
> >>> + if (pls->ctx) {
> >>> + pls->ctx->pb = NULL;
> >>> + avformat_close_input(&pls->ctx);
> >>> + }
> >>> +
> >>> + av_free(pls->url_template);
> >>> + av_free(pls);
> >>> +}
> >>> +
> >>> +static void update_options(char **dest, const char *name, void *src)
> >>> +{
> >>> + av_freep(dest);
> >>> + av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest);
> >>> + if (*dest)
> >>> + av_freep(dest);
> >>> +}
> >>> +
> >>> +static int open_url(AVFormatContext *s, AVIOContext **pb, const char
> >> *url,
> >>> + AVDictionary *opts, AVDictionary *opts2, int
> >> *is_http)
> >>> +{
> >>> + DASHContext *c = s->priv_data;
> >>> + AVDictionary *tmp = NULL;
> >>> + const char *proto_name = NULL;
> >>> + int ret;
> >>> +
> >>> + av_dict_copy(&tmp, opts, 0);
> >>> + av_dict_copy(&tmp, opts2, 0);
> >>> +
> >>> + if (av_strstart(url, "crypto", NULL)) {
> >>> + if (url[6] == '+' || url[6] == ':')
> >>> + proto_name = avio_find_protocol_name(url + 7);
> >>> + }
> >>> +
> >>> + if (!proto_name)
> >>> + proto_name = avio_find_protocol_name(url);
> >>> +
> >>> + if (!proto_name)
> >>> + return AVERROR_INVALIDDATA;
> >>> +
> >>> + // only http(s) & file are allowed
> >>> + if (!av_strstart(proto_name, "http", NULL) &&
> >> !av_strstart(proto_name, "file", NULL))
> >>> + return AVERROR_INVALIDDATA;
> >>> + if (!strncmp(proto_name, url, strlen(proto_name)) &&
> >> url[strlen(proto_name)] == ':')
> >>> + ;
> >>> + else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name,
> >> url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
> >>> + ;
> >>> + else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
> >>> + return AVERROR_INVALIDDATA;
> >>> +
> >>> + ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
> >>> + if (ret >= 0) {
> >>> + // update cookies on http response with setcookies.
> >>> + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
> >>> + update_options(&c->cookies, "cookies", u);
> >>> + av_dict_set(&opts, "cookies", c->cookies, 0);
> >>> + }
> >>> +
> >>> + av_dict_free(&tmp);
> >>> +
> >>> + if (is_http)
> >>> + *is_http = av_strstart(proto_name, "http", NULL);
> >>> +
> >>> + return ret;
> >>> +
> >>> +}
> >>> +
> >>> +static char *strreplace(const char *str, const char *from, const char
> >> *to)
> >>> +{
> >>> + /* Adjust each of the below values to suit your needs. */
> >>> + /* Increment positions cache size initially by this number. */
> >>> + size_t cache_sz_inc = 16;
> >>> + /* Thereafter, each time capacity needs to be increased,
> >>> + * multiply the increment by this factor. */
> >>> + const size_t cache_sz_inc_factor = 3;
> >>> + /* But never increment capacity by more than this number. */
> >>> + const size_t cache_sz_inc_max = 1048576;
> >>> +
> >>> + char *pret, *ret = NULL;
> >>> + const char *pstr2, *pstr = str;
> >>> + size_t i, count = 0;
> >>> + uintptr_t *pos_cache_tmp, *pos_cache = NULL;
> >>> + size_t cache_sz = 0;
> >>> + size_t cpylen, orglen, retlen, tolen, fromlen = strlen(from);
> >>> +
> >>> + /* Find all matches and cache their positions. */
> >>> + while ((pstr2 = av_stristr(pstr, from))) {
> >>> + count++;
> >>> + /* Increase the cache size when necessary. */
> >>> + if (cache_sz < count) {
> >>> + cache_sz += cache_sz_inc;
> >>> + pos_cache_tmp = av_realloc(pos_cache, sizeof(*pos_cache) *
> >> cache_sz);
> >>> + if (!pos_cache_tmp) {
> >>> + goto end_strreplace;
> >>> + } else pos_cache = pos_cache_tmp;
> >>> + cache_sz_inc *= cache_sz_inc_factor;
> >>> + if (cache_sz_inc > cache_sz_inc_max) {
> >>> + cache_sz_inc = cache_sz_inc_max;
> >>> + }
> >>> + }
> >>> +
> >>> + pos_cache[count-1] = pstr2 - str;
> >>> + pstr = pstr2 + fromlen;
> >>> + }
> >>> + orglen = pstr - str + strlen(pstr);
> >>> + /* Allocate memory for the post-replacement string. */
> >>> + if (count > 0) {
> >>> + tolen = strlen(to);
> >>> + retlen = orglen + (tolen - fromlen) * count;
> >>> + } else {
> >>> + retlen = orglen;
> >>> + }
> >>> + ret = av_malloc(retlen + 1);
> >>> + if (!ret) {
> >>> + goto end_strreplace;
> >>> + }
> >>> +
> >>> + if (!count) {
> >>> + /* If no matches, then just duplicate the string. */
> >>> + av_strlcpy(ret, str, retlen + 1);
> >>> + } else {
> >>> + /* Otherwise, duplicate the string whilst performing
> >>> + * the replacements using the position cache. */
> >>> + pret = ret;
> >>> + memcpy(pret, str, pos_cache[0]);
> >>> + pret += pos_cache[0];
> >>> + for (i = 0; i < count; i++) {
> >>> + memcpy(pret, to, tolen);
> >>> + pret += tolen;
> >>> + pstr = str + pos_cache[i] + fromlen;
> >>> + cpylen = (i == count-1 ? orglen : pos_cache[i+1]) -
> >> pos_cache[i] - fromlen;
> >>> + memcpy(pret, pstr, cpylen);
> >>> + pret += cpylen;
> >>> + }
> >>> + ret[retlen] = '\0';
> >>> + }
> >>> +
> >>> +end_strreplace:
> >>> + /* Free the cache and return the post-replacement string,
> >>> + * which will be NULL in the event of an error. */
> >>> + av_free(pos_cache);
> >>> + return ret;
> >>> +}
> >>> +
> >>> +static char *replace_template_str(const char *url, const char *marker)
> >>> +{
> >>> + char *prefix = NULL;
> >>> + char *start = 0;
> >>> + char *end = NULL;
> >>> + char *tmp_url = NULL;
> >>> + char *new_url = NULL;
> >>> + int marker_len;
> >>> +
> >>> + prefix = av_strdup(marker);
> >>> + marker_len = strlen(prefix) - 1;
> >>> + prefix[marker_len] = '\0';
> >>> +
> >>> + start = av_stristr(url, prefix);
> >>> + if (!start)
> >>> + goto finish;
> >>> + end = strchr(start + 1, '$');
> >>> + if (!end)
> >>> + goto finish;
> >>> +
> >>> + if (start[marker_len] != '%')
> >>> + goto finish;
> >>> +
> >>> + if (end[-1] != 'd')
> >>> + goto finish;
> >>> +
> >>> + tmp_url = av_mallocz(MAX_URL_SIZE);
> >>> + if (!tmp_url) {
> >>> + return NULL;
> >>> + }
> >>> +
> >>> + av_strlcpy(tmp_url, url, start - url+ 1);
> >>> + av_strlcat(tmp_url, start + marker_len, strlen(tmp_url) + end -
> >> start - marker_len);
> >>> + av_strlcat(tmp_url, PRId64, MAX_URL_SIZE);
> >>> + av_strlcat(tmp_url, end + 1, MAX_URL_SIZE);
> >>> +
> >>> +finish:
> >>> + av_free(prefix);
> >>> + new_url = strreplace(tmp_url ? tmp_url : url, marker, "%"PRId64);
> >>> + av_free(tmp_url);
> >>> + return new_url;
> >>> +}
> >>> +
> >>> +static char *get_content_url(xmlNodePtr *baseurl_nodes, int
> >> n_baseurl_nodes, xmlChar *rep_id_val, xmlChar *rep_bandwidth_val,
> xmlChar
> >> *val)
> >>> +{
> >>> + int i;
> >>> + xmlChar *text;
> >>> + char *url = NULL;
> >>> + char *tmp_str = av_mallocz(MAX_URL_SIZE);
> >>> + char *tmp_str_2 = NULL;
> >>> +
> >>> + if (!tmp_str) {
> >>> + return NULL;
> >>> + }
> >>> + for (i = 0; i < n_baseurl_nodes; ++i) {
> >>> + if (baseurl_nodes[i] && baseurl_nodes[i]->children &&
> >> baseurl_nodes[i]->children->type == XML_TEXT_NODE) {
> >>> + text = xmlNodeGetContent(baseurl_nodes[i]->children);
> >>> + if (text) {
> >>> + tmp_str_2 = av_mallocz(MAX_URL_SIZE);
> >>> + if (!tmp_str_2) {
> >>> + av_free(tmp_str);
> >>> + return NULL;
> >>> + }
> >>> + ff_make_absolute_url(tmp_str_2, MAX_URL_SIZE,
> tmp_str,
> >> text);
> >>> + av_free(tmp_str);
> >>> + tmp_str = tmp_str_2;
> >>> + xmlFree(text);
> >>> + }
> >>> + }
> >>> + }
> >>> + if (val)
> >>> + av_strlcat(tmp_str, (const char*)val, MAX_URL_SIZE);
> >>> + if (rep_id_val) {
> >>> + url = strreplace(tmp_str, "$RepresentationID$", (const
> >> char*)rep_id_val);
> >>> + av_free(tmp_str);
> >>> + tmp_str = url;
> >>> + }
> >>> + if (rep_bandwidth_val && tmp_str)
> >>> + url = strreplace(tmp_str, "$Bandwidth$", (const
> >> char*)rep_bandwidth_val);
> >>> + if (tmp_str != url)
> >>> + av_free(tmp_str);
> >>> + return url;
> >>> +}
> >>> +
> >>> +static xmlChar *get_val_from_nodes_tab(xmlNodePtr *nodes, const int
> >> n_nodes, const xmlChar *attrname)
> >>> +{
> >>> + int i;
> >>> + xmlChar *val;
> >>> +
> >>> + for (i = 0; i < n_nodes; ++i) {
> >>> + if (nodes[i]) {
> >>> + val = xmlGetProp(nodes[i], attrname);
> >>> + if (val)
> >>> + return val;
> >>> + }
> >>> + }
> >>> +
> >>> + return NULL;
> >>> +}
> >>> +
> >>> +static xmlNodePtr findChildNodeByName(xmlNodePtr rootnode, const
> >> xmlChar *nodename)
> >>> +{
> >>> + xmlNodePtr node = rootnode;
> >>> + if (!node) {
> >>> + return NULL;
> >>> + }
> >>> +
> >>> + node = xmlFirstElementChild(node);
> >>> + while (node) {
> >>> + if (!xmlStrcmp(node->name, nodename)) {
> >>> + return node;
> >>> + }
> >>> + node = xmlNextElementSibling(node);
> >>> + }
> >>> + return NULL;
> >>> +}
> >>> +
> >>> +static enum AVMediaType get_content_type(xmlNodePtr node)
> >>> +{
> >>> + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
> >>> + int i = 0;
> >>> + const char *attr;
> >>> +
> >>> + if (node) {
> >>> + while (type == AVMEDIA_TYPE_UNKNOWN && i < 2) {
> >>> + attr = (i) ? "mimeType" : "contentType";
> >>> + xmlChar *val = xmlGetProp(node, attr);
> >>> + if (val) {
> >>> + if (av_stristr((const char *)val, "video")) {
> >>> + type = AVMEDIA_TYPE_VIDEO;
> >>> + } else if (av_stristr((const char *)val, "audio")) {
> >>> + type = AVMEDIA_TYPE_AUDIO;
> >>> + }
> >>> + xmlFree(val);
> >>> + }
> >>> + i++;
> >>> + }
> >>> + }
> >>> + return type;
> >>> +}
> >>> +
> >>> +static int parse_manifest_segmenturlnode(AVFormatContext *s, struct
> >> representation *rep,
> >>> + xmlNodePtr fragmenturl_node,
> >>> + xmlNodePtr *baseurl_nodes,
> >>> + xmlChar *rep_id_val,
> >>> + xmlChar *rep_bandwidth_val)
> >>> +{
> >>> + xmlChar *initialization_val = NULL;
> >>> + xmlChar *media_val = NULL;
> >>> +
> >>> + if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar
> >> *)"Initialization")) {
> >>> + initialization_val = xmlGetProp(fragmenturl_node,
> "sourceURL");
> >>> + if (initialization_val) {
> >>> + rep->init_section = av_mallocz(sizeof(struct fragment));
> >>> + if (!rep->init_section) {
> >>> + xmlFree(initialization_val);
> >>> + return AVERROR(ENOMEM);
> >>> + }
> >>> + rep->init_section->url = get_content_url(baseurl_nodes, 4,
> >> rep_id_val, rep_bandwidth_val, initialization_val);
> >>> + rep->init_section->size = -1;
> >>> + xmlFree(initialization_val);
> >>> + }
> >>> + } else if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar
> >> *)"SegmentURL")) {
> >>> + media_val = xmlGetProp(fragmenturl_node, "media");
> >>> + if (media_val) {
> >>> + struct fragment *seg = av_mallocz(sizeof(struct
> fragment));
> >>> + if (!seg) {
> >>> + xmlFree(media_val);
> >>> + return AVERROR(ENOMEM);
> >>> + }
> >>> + seg->url = get_content_url(baseurl_nodes, 4, rep_id_val,
> >> rep_bandwidth_val, media_val);
> >>> + seg->size = -1;
> >>> + dynarray_add(&rep->fragments, &rep->n_fragments, seg);
> >>> + xmlFree(media_val);
> >>> + }
> >>> + }
> >>> +
> >>> + return 0;
> >>> +}
> >>> +
> >>> +static int parse_manifest_segmenttimeline(AVFormatContext *s, struct
> >> representation *rep,
> >>> + xmlNodePtr
> >> fragment_timeline_node)
> >>> +{
> >>> + xmlAttrPtr attr = NULL;
> >>> + xmlChar *val = NULL;
> >>> +
> >>> + if (!xmlStrcmp(fragment_timeline_node->name, (const xmlChar
> >> *)"S")) {
> >>> + struct timeline *tml = av_mallocz(sizeof(struct timeline));
> >>> + if (!tml) {
> >>> + return AVERROR(ENOMEM);
> >>> + }
> >>> + attr = fragment_timeline_node->properties;
> >>> + while (attr) {
> >>> + val = xmlGetProp(fragment_timeline_node, attr->name);
> >>> +
> >>> + if (!val) {
> >>> + av_log(s, AV_LOG_WARNING, "parse_manifest_
> segmenttimeline
> >> attr->name = %s val is NULL\n", attr->name);
> >>> + continue;
> >>> + }
> >>> +
> >>> + if (!xmlStrcmp(attr->name, (const xmlChar *)"t")) {
> >>> + tml->t = (int64_t)atoll((const char *)val);
> >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"r")) {
> >>> + tml->r =(int32_t) atoi((const char *)val);
> >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"d")) {
> >>> + tml->d = (int64_t)atoll((const char *)val);
> >>> + rep->fragment_duration = (int64_t) atoll((const char
> >> *)val);
> >>> + }
> >>> + attr = attr->next;
> >>> + xmlFree(val);
> >>> + }
> >>> + dynarray_add(&rep->timelines, &rep->n_timelines, tml);
> >>> + }
> >>> +
> >>> + return 0;
> >>> +}
> >>> +
> >>> +static int parse_manifest_representation(AVFormatContext *s, const
> >> char *url,
> >>> + xmlNodePtr node,
> >>> + xmlNodePtr adaptionset_node,
> >>> + xmlNodePtr mpd_baseurl_node,
> >>> + xmlNodePtr
> >> period_baseurl_node,
> >>> + xmlNodePtr
> >> fragment_template_node,
> >>> + xmlNodePtr
> >> content_component_node,
> >>> + xmlNodePtr
> >> adaptionset_baseurl_node)
> >>> +{
> >>> + int32_t ret = 0;
> >>> + int32_t audio_rep_idx = 0;
> >>> + int32_t video_rep_idx = 0;
> >>> + char *temp_string = NULL;
> >>> + DASHContext *c = s->priv_data;
> >>> + struct representation *rep = NULL;
> >>> + struct fragment *seg = NULL;
> >>> + xmlNodePtr representation_segmenttemplate_node = NULL;
> >>> + xmlNodePtr representation_baseurl_node = NULL;
> >>> + xmlNodePtr representation_segmentlist_node = NULL;
> >>> + xmlNodePtr fragment_timeline_node = NULL;
> >>> + xmlNodePtr fragment_templates_tab[2];
> >>> + xmlChar *duration_val = NULL;
> >>> + xmlChar *startnumber_val = NULL;
> >>> + xmlChar *timescale_val = NULL;
> >>> + xmlChar *initialization_val = NULL;
> >>> + xmlChar *media_val = NULL;
> >>> + xmlNodePtr baseurl_nodes[4];
> >>> + xmlNodePtr representation_node = node;
> >>> + xmlChar *rep_id_val = xmlGetProp(representation_node, "id");
> >>> + xmlChar *rep_bandwidth_val = xmlGetProp(representation_node,
> >> "bandwidth");
> >>> + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
> >>> +
> >>> + // try get information from representation
> >>> + if (type == AVMEDIA_TYPE_UNKNOWN)
> >>> + type = get_content_type(representation_node);
> >>> + // try get information from contentComponen
> >>> + if (type == AVMEDIA_TYPE_UNKNOWN)
> >>> + type = get_content_type(content_component_node);
> >>> + // try get information from adaption set
> >>> + if (type == AVMEDIA_TYPE_UNKNOWN)
> >>> + type = get_content_type(adaptionset_node);
> >>> + if (type == AVMEDIA_TYPE_UNKNOWN) {
> >>> + av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported
> >> representation type\n", url);
> >>> + } else if ((type == AVMEDIA_TYPE_VIDEO && ((c->video_rep_index < 0
> >> && !c->cur_video) ||
> >>> + video_rep_idx ==
> >> (int32_t)c->video_rep_index )) ||
> >>> + (type == AVMEDIA_TYPE_AUDIO && ((c->audio_rep_index <
> 0
> >> && !c->cur_audio) ||
> >>> + audio_rep_idx ==
> >> (int32_t)c->audio_rep_index ))) {
> >>> + // convert selected representation to our internal struct
> >>> + rep = av_mallocz(sizeof(struct representation));
> >>> + if (!rep) {
> >>> + ret = AVERROR(ENOMEM);
> >>> + goto end;
> >>> + }
> >>> + representation_segmenttemplate_node = findChildNodeByName(
> representation_node,
> >> "SegmentTemplate");
> >>> + representation_baseurl_node = findChildNodeByName(
> representation_node,
> >> "BaseURL");
> >>> + representation_segmentlist_node = findChildNodeByName(
> representation_node,
> >> "SegmentList");
> >>> + reset_packet(&rep->pkt);
> >>> +
> >>> + baseurl_nodes[0] = mpd_baseurl_node;
> >>> + baseurl_nodes[1] = period_baseurl_node;
> >>> + baseurl_nodes[2] = adaptionset_baseurl_node;
> >>> + baseurl_nodes[3] = representation_baseurl_node;
> >>> +
> >>> + if (representation_segmenttemplate_node ||
> >> fragment_template_node) {
> >>> + fragment_timeline_node = NULL;
> >>> + fragment_templates_tab[0] = representation_
> >> segmenttemplate_node;
> >>> + fragment_templates_tab[1] = fragment_template_node;
> >>> +
> >>> + duration_val = get_val_from_nodes_tab(
> fragment_templates_tab,
> >> 2, "duration");
> >>> + startnumber_val = get_val_from_nodes_tab(
> fragment_templates_tab,
> >> 2, "startNumber");
> >>> + timescale_val = get_val_from_nodes_tab(
> fragment_templates_tab,
> >> 2, "timescale");
> >>> + initialization_val = get_val_from_nodes_tab(
> fragment_templates_tab,
> >> 2, "initialization");
> >>> + media_val = get_val_from_nodes_tab(
> fragment_templates_tab,
> >> 2, "media");
> >>> +
> >>> + if (initialization_val) {
> >>> + rep->init_section = av_mallocz(sizeof(struct
> fragment));
> >>> + if (!rep->init_section) {
> >>> + av_free(rep);
> >>> + ret = AVERROR(ENOMEM);
> >>> + goto end;
> >>> + }
> >>> + rep->init_section->url =
> get_content_url(baseurl_nodes,
> >> 4, rep_id_val, rep_bandwidth_val, initialization_val);
> >>> + rep->init_section->size = -1;
> >>> + xmlFree(initialization_val);
> >>> + }
> >>> +
> >>> + if (media_val) {
> >>> + temp_string = get_content_url(baseurl_nodes, 4,
> >> rep_id_val, rep_bandwidth_val, media_val);
> >>> + if (temp_string) {
> >>> + if (av_stristr(temp_string, "$Number")) {
> >>> + rep->url_template = replace_template_str(temp_
> string,
> >> "$Number$");
> >>> + /* A URL template is provided from which
> >> clients build a chunk list
> >>> + * where the chunk URLs include chunk numbers
> >> (like index numbers).
> >>> + */
> >>> + rep->tmp_url_type = TMP_URL_TYPE_NUMBER; /*
> >> Number-Based. */
> >>> + } else if (av_stristr(temp_string, "$Time")) {
> >>> + rep->url_template = replace_template_str(temp_
> string,
> >> "$Time$");
> >>> + /* A URL template is provided from which
> >> clients build a chunk list
> >>> + * where the chunk URLs include chunk start
> >> times.
> >>> + */
> >>> + rep->tmp_url_type = TMP_URL_TYPE_TIME; /*
> >> Time-Based. */
> >>> + } else {
> >>> + rep->url_template = temp_string;
> >>> + temp_string = NULL;
> >>> + }
> >>> + av_free(temp_string);
> >>> + }
> >>> + xmlFree(media_val);
> >>> + }
> >>> + if (duration_val) {
> >>> + rep->fragment_duration = (int64_t) atoll((const char
> >> *)duration_val);
> >>> + xmlFree(duration_val);
> >>> + }
> >>> + if (timescale_val) {
> >>> + rep->fragment_timescale = (int64_t) atoll((const char
> >> *)timescale_val);
> >>> + xmlFree(timescale_val);
> >>> + }
> >>> + if (startnumber_val) {
> >>> + rep->first_seq_no = (int64_t) atoll((const char
> >> *)startnumber_val);
> >>> + xmlFree(startnumber_val);
> >>> + }
> >>> +
> >>> + fragment_timeline_node = findChildNodeByName(
> >> representation_segmenttemplate_node, "SegmentTimeline");
> >>> +
> >>> + if (!fragment_timeline_node)
> >>> + fragment_timeline_node = findChildNodeByName(fragment_
> template_node,
> >> "SegmentTimeline");
> >>> + if (fragment_timeline_node) {
> >>> + fragment_timeline_node =
> xmlFirstElementChild(fragment_
> >> timeline_node);
> >>> + while (fragment_timeline_node) {
> >>> + ret = parse_manifest_segmenttimeline(s, rep,
> >> fragment_timeline_node);
> >>> + if (ret < 0) {
> >>> + return ret;
> >>> + }
> >>> + fragment_timeline_node = xmlNextElementSibling(
> >> fragment_timeline_node);
> >>> + }
> >>> + }
> >>> + } else if (representation_baseurl_node &&
> >> !representation_segmentlist_node) {
> >>> + seg = av_mallocz(sizeof(struct fragment));
> >>> + if (!seg) {
> >>> + ret = AVERROR(ENOMEM);
> >>> + goto end;
> >>> + }
> >>> + seg->url = get_content_url(baseurl_nodes, 4, rep_id_val,
> >> rep_bandwidth_val, NULL);
> >>> + seg->size = -1;
> >>> + dynarray_add(&rep->fragments, &rep->n_fragments, seg);
> >>> + } else if (!representation_baseurl_node &&
> >> representation_segmentlist_node) {
> >>> + // TODO: https://www.brendanlong.com/
> >> the-structure-of-an-mpeg-dash-mpd.html
> >>> + // http://www-itec.uni-klu.ac.at/
> >> dash/ddash/mpdGenerator.php?fragmentlength=15&type=full
> >>> + xmlNodePtr fragmenturl_node = NULL;
> >>> + duration_val = xmlGetProp(representation_
> segmentlist_node,
> >> "duration");
> >>> + timescale_val = xmlGetProp(representation_
> segmentlist_node,
> >> "timescale");
> >>> + if (duration_val) {
> >>> + rep->fragment_duration = (int64_t) atoll((const char
> >> *)duration_val);
> >>> + xmlFree(duration_val);
> >>> + }
> >>> + if (timescale_val) {
> >>> + rep->fragment_timescale = (int64_t) atoll((const char
> >> *)timescale_val);
> >>> + xmlFree(timescale_val);
> >>> + }
> >>> + fragmenturl_node = xmlFirstElementChild(
> >> representation_segmentlist_node);
> >>> + while (fragmenturl_node) {
> >>> + ret = parse_manifest_segmenturlnode(s, rep,
> >> fragmenturl_node, baseurl_nodes, rep_id_val, rep_bandwidth_val);
> >>> + if (ret < 0) {
> >>> + return ret;
> >>> + }
> >>> + fragmenturl_node = xmlNextElementSibling(
> >> fragmenturl_node);
> >>> + }
> >>> + } else {
> >>> + free_representation(rep);
> >>> + rep = NULL;
> >>> + av_log(s, AV_LOG_ERROR, "Unknown format of Representation
> >> node id[%s] \n", (const char *)rep_id_val);
> >>> + }
> >>> +
> >>> + if (rep) {
> >>> + if (rep->fragment_duration > 0 &&
> !rep->fragment_timescale)
> >>> + rep->fragment_timescale = 1;
> >>> + if (type == AVMEDIA_TYPE_VIDEO) {
> >>> + rep->rep_idx = video_rep_idx;
> >>> + c->cur_video = rep;
> >>> + } else {
> >>> + rep->rep_idx = audio_rep_idx;
> >>> + c->cur_audio = rep;
> >>> + }
> >>> + }
> >>> + }
> >>> +
> >>> + video_rep_idx += type == AVMEDIA_TYPE_VIDEO;
> >>> + audio_rep_idx += type == AVMEDIA_TYPE_AUDIO;
> >>> +
> >>> +end:
> >>> + if (rep_id_val)
> >>> + xmlFree(rep_id_val);
> >>> + if (rep_bandwidth_val)
> >>> + xmlFree(rep_bandwidth_val);
> >>> +
> >>> + return ret;
> >>> +}
> >>> +
> >>> +static int parse_manifest_adaptationset(AVFormatContext *s, const
> char
> >> *url, xmlNodePtr adaptionset_node, xmlNodePtr mpd_baseurl_node,
> xmlNodePtr
> >> period_baseurl_node)
> >>> +{
> >>> + int ret = 0;
> >>> + xmlNodePtr fragment_template_node = NULL;
> >>> + xmlNodePtr content_component_node = NULL;
> >>> + xmlNodePtr adaptionset_baseurl_node = NULL;
> >>> + xmlNodePtr node = NULL;
> >>> +
> >>> + node = xmlFirstElementChild(adaptionset_node);
> >>> + while (node) {
> >>> + if (!xmlStrcmp(node->name, (const xmlChar
> *)"SegmentTemplate"))
> >> {
> >>> + fragment_template_node = node;
> >>> + } else if (!xmlStrcmp(node->name, (const xmlChar
> >> *)"ContentComponent")) {
> >>> + content_component_node = node;
> >>> + } else if (!xmlStrcmp(node->name, (const xmlChar
> *)"BaseURL")) {
> >>> + adaptionset_baseurl_node = node;
> >>> + } else if (!xmlStrcmp(node->name, (const xmlChar
> >> *)"Representation")) {
> >>> + ret = parse_manifest_representation(s, url, node,
> >>> + adaptionset_node,
> >>> + mpd_baseurl_node,
> >>> + period_baseurl_node,
> >>> +
> fragment_template_node,
> >>> +
> content_component_node,
> >>> +
> >> adaptionset_baseurl_node);
> >>> + if (ret < 0) {
> >>> + return ret;
> >>> + }
> >>> + }
> >>> + node = xmlNextElementSibling(node);
> >>> + }
> >>> + return 0;
> >>> +}
> >>> +
> >>> +
> >>> +static int parse_manifest(AVFormatContext *s, const char *url,
> >> AVIOContext *in)
> >>> +{
> >>> + DASHContext *c = s->priv_data;
> >>> + int ret = 0;
> >>> + int close_in = 0;
> >>> + uint8_t *new_url = NULL;
> >>> + int64_t filesize = 0;
> >>> + char *buffer = NULL;
> >>> + AVDictionary *opts = NULL;
> >>> + xmlDoc *doc = NULL;
> >>> + xmlNodePtr root_element = NULL;
> >>> + xmlNodePtr node = NULL;
> >>> + xmlNodePtr period_node = NULL;
> >>> + xmlNodePtr mpd_baseurl_node = NULL;
> >>> + xmlNodePtr period_baseurl_node = NULL;
> >>> + xmlNodePtr adaptionset_node = NULL;
> >>> + xmlAttrPtr attr = NULL;
> >>> + xmlChar *val = NULL;
> >>> + uint32_t perdiod_duration_sec = 0;
> >>> + uint32_t perdiod_start_sec = 0;
> >>> + int32_t audio_rep_idx = 0;
> >>> + int32_t video_rep_idx = 0;
> >>> +
> >>> + if (!in) {
> >>> + close_in = 1;
> >>> + /* This is XML manifest there is no need to set range header
> */
> >>> + av_dict_set(&opts, "seekable", "0", 0);
> >>> + // broker prior HTTP options that should be consistent across
> >> requests
> >>> + av_dict_set(&opts, "user-agent", c->user_agent, 0);
> >>> + av_dict_set(&opts, "cookies", c->cookies, 0);
> >>> + av_dict_set(&opts, "headers", c->headers, 0);
> >>> +
> >>> + ret = avio_open2(&in, url, AVIO_FLAG_READ,
> >> c->interrupt_callback, &opts);
> >>> + av_dict_free(&opts);
> >>> + if (ret < 0)
> >>> + return ret;
> >>> + }
> >>> +
> >>> + if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url)
> >=
> >> 0) {
> >>> + c->base_url = av_strdup(new_url);
> >>> + } else {
> >>> + c->base_url = av_strdup(url);
> >>> + }
> >>> +
> >>> + filesize = avio_size(in);
> >>> + if (filesize <= 0){
> >>> + filesize = 8 * 1024;
> >>> + }
> >>> +
> >>> + buffer = av_mallocz(filesize);
> >>> + if (!buffer) {
> >>> + return AVERROR(ENOMEM);
> >>> + }
> >>> +
> >>> + filesize = avio_read(in, buffer, filesize);
> >>> + if (filesize > 0) {
> >>> + LIBXML_TEST_VERSION
> >>> +
> >>> + doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0);
> >>> + root_element = xmlDocGetRootElement(doc);
> >>> + node = root_element;
> >>> +
> >>> + if (!node) {
> >>> + ret = AVERROR_INVALIDDATA;
> >>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing
> >> root node\n", url);
> >>> + goto cleanup;
> >>> + }
> >>> +
> >>> + if (node->type != XML_ELEMENT_NODE ||
> >>> + xmlStrcmp(node->name, (const xmlChar *)"MPD")) {
> >>> + ret = AVERROR_INVALIDDATA;
> >>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root
> >> node name[%s] type[%d]\n", url, node->name, (int)node->type);
> >>> + goto cleanup;
> >>> + }
> >>> +
> >>> + val = xmlGetProp(node, "type");
> >>> + if (!val) {
> >>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing
> >> type attrib\n", url);
> >>> + ret = AVERROR_INVALIDDATA;
> >>> + goto cleanup;
> >>> + }
> >>> + if (!xmlStrcmp(val, (const xmlChar *)"dynamic"))
> >>> + c->is_live = 1;
> >>> + xmlFree(val);
> >>> +
> >>> + attr = node->properties;
> >>> + while (attr) {
> >>> + val = xmlGetProp(node, attr->name);
> >>> +
> >>> + if (!xmlStrcmp(attr->name, (const xmlChar
> >> *)"availabilityStartTime")) {
> >>> + c->availability_start_time_sec =
> GetUTCDateTimeInSec(s,
> >> (const char *)val);
> >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar
> >> *)"publishTime")) {
> >>> + c->publish_time_sec = GetUTCDateTimeInSec(s, (const
> >> char *)val);
> >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar
> >> *)"minimumUpdatePeriod")) {
> >>> + c->minimum_update_period_sec = GetDurationInSec(s,
> >> (const char *)val);
> >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar
> >> *)"timeShiftBufferDepth")) {
> >>> + c->time_shift_buffer_depth_sec = GetDurationInSec(s,
> >> (const char *)val);
> >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar
> >> *)"minBufferTime")) {
> >>> + c->min_buffer_time_sec = GetDurationInSec(s, (const
> >> char *)val);
> >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar
> >> *)"suggestedPresentationDelay")) {
> >>> + c->suggested_presentation_delay_sec =
> >> GetDurationInSec(s, (const char *)val);
> >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar
> >> *)"mediaPresentationDuration")) {
> >>> + c->media_presentation_duration_sec =
> >> GetDurationInSec(s, (const char *)val);
> >>> + }
> >>> + attr = attr->next;
> >>> + xmlFree(val);
> >>> + }
> >>> +
> >>> + mpd_baseurl_node = findChildNodeByName(node, "BaseURL");
> >>> +
> >>> + // at now we can handle only one period, with the longest
> >> duration
> >>> + node = xmlFirstElementChild(node);
> >>> + while (node) {
> >>> + if (!xmlStrcmp(node->name, (const xmlChar *)"Period")) {
> >>> + perdiod_duration_sec = 0;
> >>> + perdiod_start_sec = 0;
> >>> + attr = node->properties;
> >>> + while (attr) {
> >>> + val = xmlGetProp(node, attr->name);
> >>> + if (!xmlStrcmp(attr->name, (const xmlChar
> >> *)"duration")) {
> >>> + perdiod_duration_sec = GetDurationInSec(s,
> >> (const char *)val);
> >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar
> >> *)"start")) {
> >>> + perdiod_start_sec = GetDurationInSec(s, (const
> >> char *)val);
> >>> + }
> >>> + attr = attr->next;
> >>> + xmlFree(val);
> >>> + }
> >>> + if ((perdiod_duration_sec) >=
> (c->period_duration_sec))
> >> {
> >>> + period_node = node;
> >>> + c->period_duration_sec = perdiod_duration_sec;
> >>> + c->period_start_sec = perdiod_start_sec;
> >>> + if (c->period_start_sec > 0)
> >>> + c->media_presentation_duration_sec =
> >> c->period_duration_sec;
> >>> + }
> >>> + }
> >>> + node = xmlNextElementSibling(node);
> >>> + }
> >>> + if (!period_node) {
> >>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing
> >> Period node\n", url);
> >>> + ret = AVERROR_INVALIDDATA;
> >>> + goto cleanup;
> >>> + }
> >>> + // explore AdaptationSet
> >>> + adaptionset_node = xmlFirstElementChild(period_node);
> >>> + while (adaptionset_node) {
> >>> + if (!xmlStrcmp(adaptionset_node->name, (const xmlChar
> >> *)"BaseURL")) {
> >>> + period_baseurl_node = adaptionset_node;
> >>> + } else if (!xmlStrcmp(adaptionset_node->name, (const
> >> xmlChar *)"AdaptationSet")) {
> >>> + parse_manifest_adaptationset(s, url,
> adaptionset_node,
> >> mpd_baseurl_node, period_baseurl_node);
> >>> + }
> >>> + adaptionset_node = xmlNextElementSibling(
> adaptionset_node);
> >>> + }
> >>> + if (c->cur_video) {
> >>> + c->cur_video->rep_count = video_rep_idx;
> >>> + c->cur_video->fix_multiple_stsd_order = 1;
> >>> + av_log(s, AV_LOG_VERBOSE, "rep_idx[%d]\n",
> >> (int)c->cur_video->rep_idx);
> >>> + av_log(s, AV_LOG_VERBOSE, "rep_count[%d]\n",
> >> (int)video_rep_idx);
> >>> + }
> >>> + if (c->cur_audio) {
> >>> + c->cur_audio->rep_count = audio_rep_idx;
> >>> + }
> >>> +
> >>> +cleanup:
> >>> + /*free the document */
> >>> + xmlFreeDoc(doc);
> >>> + xmlCleanupParser();
> >>> + } else {
> >>> + av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n",
> url);
> >>> + ret = AVERROR_INVALIDDATA;
> >>> + }
> >>> +
> >>> + av_free(new_url);
> >>> + av_free(buffer);
> >>> + if (close_in) {
> >>> + avio_close(in);
> >>> + }
> >>> + return ret;
> >>> +}
> >>> +
> >>> +static int64_t calc_cur_seg_no(AVFormatContext *s, struct
> >> representation *pls)
> >>> +{
> >>> + DASHContext *c = pls->parent->priv_data;
> >>> + int64_t num = 0;
> >>> +
> >>> + if (c->is_live) {
> >>> + if (!pls->fragment_duration) {
> >>> + av_log(s, AV_LOG_ERROR, "Get not get fragment duration
> >> value in live mode\n");
> >>> + return pls->first_seq_no;
> >>> + }
> >>> + num = pls->first_seq_no + (((GetCurrentTimeInSec() -
> >> c->availability_start_time_sec) - c->presentation_delay_sec) *
> >> pls->fragment_timescale) / pls->fragment_duration;
> >>> + } else {
> >>> + num = pls->first_seq_no;
> >>> + }
> >>> + return num;
> >>> +}
> >>> +
> >>> +static int64_t calc_min_seg_no(AVFormatContext *s, struct
> >> representation *pls)
> >>> +{
> >>> + DASHContext *c = pls->parent->priv_data;
> >>> + int64_t num = 0;
> >>> +
> >>> + if (c->is_live) {
> >>> + if (!pls->fragment_duration) {
> >>> + av_log(s, AV_LOG_ERROR, "Get not get fragment duration
> >> value in live mode\n");
> >>> + return pls->first_seq_no;
> >>> + }
> >>> + num = pls->first_seq_no + (((GetCurrentTimeInSec() -
> >> c->availability_start_time_sec) - c->time_shift_buffer_depth_sec) *
> >> pls->fragment_timescale) / pls->fragment_duration;
> >>> + } else {
> >>> + num = pls->first_seq_no;
> >>> + }
> >>> + return num;
> >>> +}
> >>> +
> >>> +static int64_t calc_max_seg_no(AVFormatContext *s, struct
> >> representation *pls)
> >>> +{
> >>> + DASHContext *c = pls->parent->priv_data;
> >>> + int64_t num = 0;
> >>> + int64_t i = 0;
> >>> +
> >>> + if (c->is_live) {
> >>> + if (!pls->fragment_duration) {
> >>> + av_log(s, AV_LOG_ERROR, "Get not get fragment duration
> >> value in live mode\n");
> >>> + return pls->first_seq_no;
> >>> + }
> >>> + num = pls->first_seq_no + (((GetCurrentTimeInSec() -
> >> c->availability_start_time_sec)) * pls->fragment_timescale) /
> >> pls->fragment_duration;
> >>> + } else {
> >>> + if (pls->n_fragments) {
> >>> + num = pls->first_seq_no + pls->n_fragments - 1;
> >>> + } else if (pls->n_timelines) {
> >>> + num = pls->first_seq_no + pls->n_timelines - 1;
> >>> + for (i = 0; i < pls->n_timelines; ++i) {
> >>> + num += pls->timelines[i]->r;
> >>> + }
> >>> + } else {
> >>> + num = pls->first_seq_no + (c->media_presentation_
> duration_sec
> >> * pls->fragment_timescale) / pls->fragment_duration;
> >>> + }
> >>> + }
> >>> +
> >>> + return num;
> >>> +}
> >>> +
> >>> +static int64_t get_fragment_start_time(struct representation *pls,
> >> int64_t cur_seq_no)
> >>> +{
> >>> + int64_t i = 0;
> >>> + int64_t j = 0;
> >>> + int64_t num = 0;
> >>> + int64_t startTime = 0;
> >>> +
> >>> + if (pls->n_timelines) {
> >>> + for (i = 0; i < pls->n_timelines; ++i) {
> >>> + if (pls->timelines[i]->t > 0) {
> >>> + startTime = pls->timelines[i]->t;
> >>> + }
> >>> + if (num == cur_seq_no)
> >>> + goto finish;
> >>> + startTime += pls->timelines[i]->d;
> >>> + for (j = 0; j < pls->timelines[i]->r; ++j) {
> >>> + num++;
> >>> + if (num == cur_seq_no)
> >>> + goto finish;
> >>> + startTime += pls->timelines[i]->d;
> >>> + }
> >>> + num++;
> >>> + }
> >>> + }
> >>> +
> >>> +finish:
> >>> + return startTime;
> >>> +}
> >>> +
> >>> +static struct fragment *get_current_fragment(struct representation
> *pls)
> >>> +{
> >>> + int64_t min_seq_no = 0;
> >>> + int64_t max_seq_no = 0;
> >>> + 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) {
> >>> + int64_t tmp_val = pls->tmp_url_type == TMP_URL_TYPE_NUMBER
> >> ? pls->cur_seq_no : get_fragment_start_time(pls, pls->cur_seq_no);
> >>> + tmp_str = av_asprintf(pls->url_template,
> (int64_t)tmp_val);
> >>
> >> Still no. Do not use ANY printf-family function with any user input as
> the
> >> format-string argument.
> >>
> > Can you give some suggestion to make similar function:
> > av_asprintf(pls->url_template,
> > (int64_t)tmp_val); the url_template is looks like "
> > chunk-stream0-%lld.m4s".
>
> Delay the strreplace call until get_current_fragment, and rather than
> replacing with a printf formatter, just insert the actual value at that
> point.
>
av_asprintf is defined by ffmpeg, and the tmp_val is get from calc* , why
cannot use here?
I saw segment and some other segment list is use av_asprintf, is this mean
those should modify?
the strreplace is used for replace template,not be used for get to change
the value of the tmp_val.
>
> >
> >> Also, the cast here doesn't make sense.
> >>
> >>> + seg->url = av_strdup(tmp_str);
> >>> + if (!seg->url) {
> >>> + av_free(tmp_str);
> >>> + return NULL;
> >>> + }
> >>> + } else {
> >>> + av_log(pls->parent, AV_LOG_ERROR, "Unable to unable to
> >> resolve template url '%s'\n", pls->url_template);
> >>> + seg->url = av_strdup(pls->url_template);
> >>> + if (!seg->url) {
> >>> + return NULL;
> >>> + }
> >>> + }
> >>> + seg->size = -1;
> >>> + }
> >>> +
> >>> + av_free(tmp_str);
> >>> + return seg;
> >>> +}
> >>> +
> >>> +enum ReadFromURLMode {
> >>> + READ_NORMAL,
> >>> + READ_COMPLETE,
> >>> +};
> >>> +
> >>> +static int read_from_url(struct representation *pls, struct fragment
> >> *seg,
> >>> + uint8_t *buf, int buf_size,
> >>> + enum ReadFromURLMode mode)
> >>> +{
> >>> + int ret;
> >>> +
> >>> + /* limit read if the fragment was only a part of a file */
> >>> + if (seg->size >= 0)
> >>> + buf_size = FFMIN(buf_size, pls->cur_seg_size -
> >> pls->cur_seg_offset);
> >>> +
> >>> + if (mode == READ_COMPLETE) {
> >>> + ret = avio_read(pls->input, buf, buf_size);
> >>> + if (ret < buf_size) {
> >>> + av_log(pls->parent, AV_LOG_WARNING, "Could not read
> >> complete fragment.\n");
> >>> + }
> >>> + } else {
> >>> + ret = avio_read(pls->input, buf, buf_size);
> >>> + }
> >>> + if (ret > 0)
> >>> + pls->cur_seg_offset += ret;
> >>> +
> >>> + return ret;
> >>> +}
> >>> +
> >>> +static int open_input(DASHContext *c, struct representation *pls,
> >> struct fragment *seg)
> >>> +{
> >>> + AVDictionary *opts = NULL;
> >>> + char url[MAX_URL_SIZE];
> >>> + int ret;
> >>> +
> >>> + // broker prior HTTP options that should be consistent across
> >> requests
> >>> + av_dict_set(&opts, "user-agent", c->user_agent, 0);
> >>> + av_dict_set(&opts, "cookies", c->cookies, 0);
> >>> + av_dict_set(&opts, "headers", c->headers, 0);
> >>> + if (c->is_live) {
> >>> + av_dict_set(&opts, "seekable", "0", 0);
> >>> + }
> >>> +
> >>> + if (seg->size >= 0) {
> >>> + /* try to restrict the HTTP request to the part we want
> >>> + * (if this is in fact a HTTP request) */
> >>> + av_dict_set_int(&opts, "offset", seg->url_offset, 0);
> >>> + av_dict_set_int(&opts, "end_offset", seg->url_offset +
> >> seg->size, 0);
> >>> + }
> >>> +
> >>> + ff_make_absolute_url(url, MAX_URL_SIZE, c->base_url, seg->url);
> >>> + av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s',
> >> offset %"PRId64", playlist %d\n",
> >>> + url, seg->url_offset, pls->rep_idx);
> >>> + ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts,
> >> NULL);
> >>> + if (ret < 0) {
> >>> + goto cleanup;
> >>> + }
> >>> +
> >>> + /* Seek to the requested position. If this was a HTTP request, the
> >> offset
> >>> + * should already be where want it to, but this allows e.g. local
> >> testing
> >>> + * without a HTTP server. */
> >>> + if (!ret && seg->url_offset) {
> >>> + int64_t seekret = avio_seek(pls->input, seg->url_offset,
> >> SEEK_SET);
> >>> + if (seekret < 0) {
> >>> + av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to
> offset
> >> %"PRId64" of DASH fragment '%s'\n", seg->url_offset, seg->url);
> >>> + ret = (int) seekret;
> >>> + ff_format_io_close(pls->parent, &pls->input);
> >>> + }
> >>> + }
> >>> +
> >>> +cleanup:
> >>> + av_dict_free(&opts);
> >>> + pls->cur_seg_offset = 0;
> >>> + pls->cur_seg_size = seg->size;
> >>> + return ret;
> >>> +}
> >>> +
> >>> +static int update_init_section(struct representation *pls)
> >>> +{
> >>> + static const int max_init_section_size = 1024*1024;
> >>> + DASHContext *c = pls->parent->priv_data;
> >>> + int64_t sec_size = 0;
> >>> + int64_t urlsize = 0;
> >>> + int ret = 0;
> >>> +
> >>> + /* read init section only once per representation */
> >>> + if (!pls->init_section || pls->init_sec_buf) {
> >>> + return 0;
> >>> + }
> >>> +
> >>> + ret = open_input(c, pls, pls->init_section);
> >>> + if (ret < 0) {
> >>> + av_log(pls->parent, AV_LOG_WARNING, "Failed to open an
> >> initialization section in playlist %d\n", pls->rep_idx);
> >>> + return ret;
> >>> + }
> >>> +
> >>> + if (pls->init_section->size >= 0) {
> >>> + sec_size = pls->init_section->size;
> >>> + } else if ((urlsize = avio_size(pls->input)) >= 0) {
> >>> + sec_size = urlsize;
> >>> + } else {
> >>> + sec_size = max_init_section_size;
> >>> + }
> >>> + av_log(pls->parent, AV_LOG_DEBUG, "Downloading an initialization
> >> section of size %"PRId64"\n", sec_size);
> >>> + sec_size = FFMIN(sec_size, max_init_section_size);
> >>> + av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size,
> >> sec_size);
> >>> + ret = read_from_url(pls, pls->init_section, pls->init_sec_buf,
> >> pls->init_sec_buf_size, READ_COMPLETE);
> >>> + ff_format_io_close(pls->parent, &pls->input);
> >>> + if (ret < 0)
> >>> + return ret;
> >>> +
> >>> + if (pls->fix_multiple_stsd_order && pls->rep_idx > 0) {
> >>> + uint8_t **stsd_entries = NULL;
> >>> + int *stsd_entries_size = NULL;
> >>> + int i = 4;
> >>> +
> >>> + while (i <= (ret - 4)) {
> >>> + // find start stsd atom
> >>> + if (!memcmp(pls->init_sec_buf + i, "stsd", 4)) {
> >>> + /* 1B version
> >>> + * 3B flags
> >>> + * 4B num of entries */
> >>> + int stsd_first_offset = i + 8;
> >>> + int stsd_offset = 0;
> >>> + int j = 0;
> >>> + uint32_t stsd_count = AV_RB32(pls->init_sec_buf +
> >> stsd_first_offset);
> >>> + stsd_first_offset += 4;
> >>> + if (stsd_count != pls->rep_count) {
> >>> + i++;
> >>> + continue;
> >>> + }
> >>> + // find all stsd entries
> >>> + stsd_entries = av_mallocz_array(stsd_count,
> >> sizeof(*stsd_entries));
> >>> + stsd_entries_size = av_mallocz_array(stsd_count,
> >> sizeof(*stsd_entries_size));
> >>> + for (j = 0; j < stsd_count; ++j) {
> >>> + /* 4B - size
> >>> + * 4B - format */
> >>> + stsd_entries_size[j] = AV_RB32(pls->init_sec_buf +
> >> stsd_first_offset + stsd_offset);
> >>> + stsd_entries[j] = av_malloc(stsd_entries_size[j]
> );
> >>> + memcpy(stsd_entries[j], pls->init_sec_buf +
> >> stsd_first_offset + stsd_offset, stsd_entries_size[j]);
> >>> + stsd_offset += stsd_entries_size[j];
> >>> + }
> >>> + // reorder stsd entries
> >>> + // as first put stsd entry for current representation
> >>> + j = pls->rep_idx;
> >>> + stsd_offset = stsd_first_offset;
> >>> + memcpy(pls->init_sec_buf + stsd_offset,
> >> stsd_entries[j], stsd_entries_size[j]);
> >>> + stsd_offset += stsd_entries_size[j];
> >>> + for (j = 0; j < stsd_count; ++j) {
> >>> + if (j != pls->rep_idx) {
> >>> + memcpy(pls->init_sec_buf + stsd_offset,
> >> stsd_entries[j], stsd_entries_size[j]);
> >>> + stsd_offset += stsd_entries_size[j];
> >>> + }
> >>> + av_free(stsd_entries[j]);
> >>> + }
> >>> + av_freep(&stsd_entries);
> >>> + av_freep(&stsd_entries_size);
> >>> + break;
> >>> + }
> >>> + i++;
> >>> + }
> >>> + }
> >>> +
> >>> + av_log(pls->parent, AV_LOG_TRACE, "pls[%p] init section
> >> size[%d]\n", pls, (int)ret);
> >>> + pls->init_sec_data_len = ret;
> >>> + pls->init_sec_buf_read_offset = 0;
> >>> +
> >>> + return 0;
> >>> +}
> >>> +
> >>> +static int64_t seek_data(void *opaque, int64_t offset, int whence)
> >>> +{
> >>> + struct representation *v = opaque;
> >>> + if (v->n_fragments && !v->init_sec_data_len) {
> >>> + return avio_seek(v->input, offset, whence);
> >>> + }
> >>> +
> >>> + return AVERROR(ENOSYS);
> >>> +}
> >>> +
> >>> +static int read_data(void *opaque, uint8_t *buf, int buf_size)
> >>> +{
> >>> + int ret = 0;
> >>> + struct representation *v = opaque;
> >>> + DASHContext *c = v->parent->priv_data;
> >>> +
> >>> +restart:
> >>> + if (!v->input) {
> >>> + free_fragment(&v->cur_seg);
> >>> + v->cur_seg = get_current_fragment(v);
> >>> + if (!v->cur_seg) {
> >>> + ret = AVERROR_EOF;
> >>> + goto end;
> >>> + }
> >>> +
> >>> + /* load/update Media Initialization Section, if any */
> >>> + ret = update_init_section(v);
> >>> + if (ret)
> >>> + goto end;
> >>> +
> >>> + ret = open_input(c, v, v->cur_seg);
> >>> + if (ret < 0) {
> >>> + if (ff_check_interrupt(c->interrupt_callback)) {
> >>> + goto end;
> >>> + ret = AVERROR_EXIT;
> >>> + }
> >>> + av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment
> >> of playlist %d\n", v->rep_idx);
> >>> + v->cur_seq_no++;
> >>> + goto restart;
> >>> + }
> >>> + }
> >>> +
> >>> + if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
> >>> + /* Push init section out first before first actual fragment */
> >>> + int copy_size = FFMIN(v->init_sec_data_len -
> >> v->init_sec_buf_read_offset, buf_size);
> >>> + memcpy(buf, v->init_sec_buf, copy_size);
> >>> + v->init_sec_buf_read_offset += copy_size;
> >>> + ret = copy_size;
> >>> + goto end;
> >>> + }
> >>> +
> >>> + /* check the v->cur_seg, if it is null, get current and double
> >> check if the new v->cur_seg*/
> >>> + if (!v->cur_seg) {
> >>> + v->cur_seg = get_current_fragment(v);
> >>> + }
> >>> + if (!v->cur_seg) {
> >>> + ret = AVERROR_EOF;
> >>> + goto end;
> >>> + }
> >>> + ret = read_from_url(v, v->cur_seg, buf, buf_size, READ_NORMAL);
> >>> + if (ret > 0)
> >>> + goto end;
> >>> + ff_format_io_close(v->parent, &v->input);
> >>> + v->cur_seq_no++;
> >>> + goto restart;
> >>> +
> >>> +end:
> >>> + return ret;
> >>> +}
> >>> +
> >>> +static int save_avio_options(AVFormatContext *s)
> >>> +{
> >>> + DASHContext *c = s->priv_data;
> >>> + const char *opts[] = { "headers", "user_agent", "user-agent",
> >> "cookies", NULL }, **opt = opts;
> >>> + uint8_t *buf = NULL;
> >>> + int ret = 0;
> >>> +
> >>> + while (*opt) {
> >>> + if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >=
> 0)
> >> {
> >>> + if (buf) {
> >>> + ret = av_dict_set(&c->avio_opts, *opt, buf,
> >> AV_DICT_DONT_STRDUP_VAL);
> >>> + if (ret < 0)
> >>> + return ret;
> >>> + }
> >>> + }
> >>> + opt++;
> >>> + }
> >>> +
> >>> + return ret;
> >>> +}
> >>> +
> >>> +static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const
> >> char *url,
> >>> + int flags, AVDictionary **opts)
> >>> +{
> >>> + av_log(s, AV_LOG_ERROR,
> >>> + "A HDS playlist item '%s' referred to an external file
> '%s'.
> >> "
> >>> + "Opening this file was forbidden for security reasons\n",
> >>> + s->filename, url);
> >>> + return AVERROR(EPERM);
> >>> +}
> >>> +
> >>> +static int reopen_demux_for_component(AVFormatContext *s, struct
> >> representation *pls)
> >>> +{
> >>> + DASHContext *c = s->priv_data;
> >>> + AVInputFormat *in_fmt = NULL;
> >>> + AVDictionary *in_fmt_opts = NULL;
> >>> + uint8_t *avio_ctx_buffer = NULL;
> >>> + int ret = 0;
> >>> +
> >>> + if (pls->ctx) {
> >>> + /* note: the internal buffer could have changed, and be !=
> >> avio_ctx_buffer */
> >>> + av_freep(&pls->pb.buffer);
> >>> + memset(&pls->pb, 0x00, sizeof(AVIOContext));
> >>> + pls->ctx->pb = NULL;
> >>> + avformat_close_input(&pls->ctx);
> >>> + pls->ctx = NULL;
> >>> + }
> >>> + if (!(pls->ctx = avformat_alloc_context())) {
> >>> + ret = AVERROR(ENOMEM);
> >>> + goto fail;
> >>> + }
> >>> +
> >>> + avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE);
> >>> + if (!avio_ctx_buffer ){
> >>> + ret = AVERROR(ENOMEM);
> >>> + avformat_free_context(pls->ctx);
> >>> + pls->ctx = NULL;
> >>> + goto fail;
> >>> + }
> >>> + if (c->is_live) {
> >>> + ffio_init_context(&pls->pb, avio_ctx_buffer ,
> >> INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL);
> >>> + } else {
> >>> + ffio_init_context(&pls->pb, avio_ctx_buffer ,
> >> INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data);
> >>> + }
> >>> + pls->pb.seekable = 0;
> >>> +
> >>> + if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
> >>> + goto fail;
> >>> +
> >>> + pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO;
> >>> + pls->ctx->probesize = 1024 * 4;
> >>> + pls->ctx->max_analyze_duration = 4 * AV_TIME_BASE;
> >>> + ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0);
> >>> + if (ret < 0) {
> >>> + av_log(s, AV_LOG_ERROR, "Error when loading first fragment,
> >> playlist %d\n", (int)pls->rep_idx);
> >>> + avformat_free_context(pls->ctx);
> >>> + pls->ctx = NULL;
> >>> + goto fail;
> >>> + }
> >>> +
> >>> + pls->ctx->pb = &pls->pb;
> >>> + pls->ctx->io_open = nested_io_open;
> >>> +
> >>> + // provide additional information from mpd if available
> >>> + ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts);
> >> //pls->init_section->url
> >>> + av_dict_free(&in_fmt_opts);
> >>> + if (ret < 0)
> >>> + goto fail;
> >>> + if (pls->n_fragments) {
> >>> + ret = avformat_find_stream_info(pls->ctx, NULL);
> >>> + if (ret < 0)
> >>> + goto fail;
> >>> + }
> >>> +
> >>> +fail:
> >>> + return ret;
> >>> +}
> >>> +
> >>> +static int open_demux_for_component(AVFormatContext *s, struct
> >> representation *pls)
> >>> +{
> >>> + int ret = 0;
> >>> + int i;
> >>> +
> >>> + pls->parent = s;
> >>> + pls->cur_seq_no = calc_cur_seg_no(s, pls);
> >>> + pls->last_seq_no = calc_max_seg_no(s, pls);
> >>> +
> >>> + ret = reopen_demux_for_component(s, pls);
> >>> + if (ret < 0) {
> >>> + goto fail;
> >>> + }
> >>> + for (i = 0; i < pls->ctx->nb_streams; i++) {
> >>> + AVStream *st = avformat_new_stream(s, NULL);
> >>> + AVStream *ist = pls->ctx->streams[i];
> >>> + if (!st) {
> >>> + ret = AVERROR(ENOMEM);
> >>> + goto fail;
> >>> + }
> >>> + st->id = i;
> >>> + avcodec_parameters_copy(st->codecpar, pls->ctx->streams[i]->
> >> codecpar);
> >>> + avpriv_set_pts_info(st, ist->pts_wrap_bits,
> ist->time_base.num,
> >> ist->time_base.den);
> >>> + }
> >>> +
> >>> + return 0;
> >>> +fail:
> >>> + return ret;
> >>> +}
> >>> +
> >>> +static int dash_read_header(AVFormatContext *s)
> >>> +{
> >>> + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
> >>> + DASHContext *c = s->priv_data;
> >>> + int ret = 0;
> >>> + int stream_index = 0;
> >>> +
> >>> + c->interrupt_callback = &s->interrupt_callback;
> >>> + // if the URL context is good, read important options we must
> >> broker later
> >>> + if (u) {
> >>> + update_options(&c->user_agent, "user-agent", u);
> >>> + update_options(&c->cookies, "cookies", u);
> >>> + update_options(&c->headers, "headers", u);
> >>> + }
> >>> +
> >>> + if ((ret = parse_manifest(s, s->filename, s->pb)) < 0)
> >>> + goto fail;
> >>> +
> >>> + if ((ret = save_avio_options(s)) < 0)
> >>> + goto fail;
> >>> +
> >>> + /* If this isn't a live stream, fill the total duration of the
> >>> + * stream. */
> >>> + if (!c->is_live) {
> >>> + s->duration = (int64_t) c->media_presentation_duration_sec *
> >> AV_TIME_BASE;
> >>> + }
> >>> +
> >>> + /* Open the demuxer for curent video and current audio components
> >> if available */
> >>> + if (!ret && c->cur_video) {
> >>> + ret = open_demux_for_component(s, c->cur_video);
> >>> + if (!ret) {
> >>> + c->cur_video->stream_index = stream_index;
> >>> + ++stream_index;
> >>> + } else {
> >>> + free_representation(c->cur_video);
> >>> + c->cur_video = NULL;
> >>> + }
> >>> + }
> >>> +
> >>> + if (!ret && c->cur_audio) {
> >>> + ret = open_demux_for_component(s, c->cur_audio);
> >>> + if (!ret) {
> >>> + c->cur_audio->stream_index = stream_index;
> >>> + ++stream_index;
> >>> + } else {
> >>> + free_representation(c->cur_audio);
> >>> + c->cur_audio = NULL;
> >>> + }
> >>> + }
> >>> +
> >>> + if (!stream_index) {
> >>> + ret = AVERROR_INVALIDDATA;
> >>> + goto fail;
> >>> + }
> >>> +
> >>> + /* Create a program */
> >>> + if (!ret) {
> >>> + AVProgram *program;
> >>> + program = av_new_program(s, 0);
> >>> + if (!program) {
> >>> + goto fail;
> >>> + }
> >>> +
> >>> + if (c->cur_video) {
> >>> + av_program_add_stream_index(s, 0,
> >> c->cur_video->stream_index);
> >>> + }
> >>> +
> >>> + if (c->cur_audio) {
> >>> + av_program_add_stream_index(s, 0,
> >> c->cur_audio->stream_index);
> >>> + }
> >>> + }
> >>> +
> >>> + return 0;
> >>> +fail:
> >>> + return ret;
> >>> +}
> >>> +
> >>> +static int dash_read_packet(AVFormatContext *s, AVPacket *pkt)
> >>> +{
> >>> + DASHContext *c = s->priv_data;
> >>> + int ret = 0;
> >>> + struct representation *cur = NULL;
> >>> +
> >>> + if (!c->cur_audio && !c->cur_video) {
> >>> + return AVERROR_INVALIDDATA;
> >>> + }
> >>> + if (c->cur_audio && !c->cur_video) {
> >>> + cur = c->cur_audio;
> >>> + } else if (!c->cur_audio && c->cur_video) {
> >>> + cur = c->cur_video;
> >>> + } else if (c->cur_video->cur_timestamp <
> >> c->cur_audio->cur_timestamp) {
> >>> + cur = c->cur_video;
> >>> + } else {
> >>> + cur = c->cur_audio;
> >>> + }
> >>> +
> >>> + if (cur->ctx) {
> >>> + ret = av_read_frame(cur->ctx, &cur->pkt);
> >>> + if (ret < 0) {
> >>> + av_packet_unref(&cur->pkt);
> >>> + } else {
> >>> + /* If we got a packet, return it */
> >>> + *pkt = cur->pkt;
> >>> + cur->cur_timestamp = av_rescale(pkt->pts,
> >> (int64_t)cur->ctx->streams[0]->time_base.num * 90000,
> >> cur->ctx->streams[0]->time_base.den);
> >>> + pkt->stream_index = cur->stream_index;
> >>> + reset_packet(&cur->pkt);
> >>> + return 0;
> >>> + }
> >>> + }
> >>> + return AVERROR_EOF;
> >>> +}
> >>> +
> >>> +static int dash_close(AVFormatContext *s)
> >>> +{
> >>> + DASHContext *c = s->priv_data;
> >>> +
> >>> + if (c->cur_audio) {
> >>> + free_representation(c->cur_audio);
> >>> + }
> >>> +
> >>> + if (c->cur_video) {
> >>> + free_representation(c->cur_video);
> >>> + }
> >>> +
> >>> + av_freep(&c->cookies);
> >>> + av_freep(&c->user_agent);
> >>> + av_dict_free(&c->avio_opts);
> >>> + av_freep(&c->base_url);
> >>> + return 0;
> >>> +}
> >>> +
> >>> +static int dash_seek(AVFormatContext *s, struct representation *pls,
> >> int64_t seek_pos_msec, int flags)
> >>> +{
> >>> + int ret = 0;
> >>> + int i = 0;
> >>> + int j = 0;
> >>> + int64_t duration = 0;
> >>> +
> >>> + av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms],
> >> playlist %d\n", seek_pos_msec, pls->rep_idx);
> >>> +
> >>> + // single fragment mode
> >>> + if (pls->n_fragments) {
> >>> + pls->cur_timestamp = 0;
> >>> + pls->cur_seg_offset = 0;
> >>> + ff_read_frame_flush(pls->ctx);
> >>> + return av_seek_frame(pls->ctx, -1, seek_pos_msec*1000, flags);
> >>> + }
> >>> +
> >>> + if (pls->input)
> >>> + ff_format_io_close(pls->parent, &pls->input);
> >>> +
> >>> + // find the nearest fragment
> >>> + if (pls->n_timelines > 0 && pls->fragment_timescale > 0) {
> >>> + int64_t num = pls->first_seq_no;
> >>> + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with
> >> SegmentTimeline start n_timelines[%d] last_seq_no[%"PRId64"], playlist
> >> %d.\n",
> >>> + (int)pls->n_timelines, (int64_t)pls->last_seq_no,
> >> (int)pls->rep_idx);
> >>> + for (i = 0; i < pls->n_timelines; i++) {
> >>> + if (pls->timelines[i]->t > 0) {
> >>> + duration = pls->timelines[i]->t;
> >>> + }
> >>> + duration += pls->timelines[i]->d;
> >>> + if (seek_pos_msec < ((duration * 1000) /
> >> pls->fragment_timescale)) {
> >>> + goto set_seq_num;
> >>> + }
> >>> + for (j = 0; j < pls->timelines[i]->r; j++) {
> >>> + duration += pls->timelines[i]->d;
> >>> + num++;
> >>> + if (seek_pos_msec < ((duration * 1000) /
> >> pls->fragment_timescale)) {
> >>> + goto set_seq_num;
> >>> + }
> >>> + }
> >>> + num++;
> >>> + }
> >>> +
> >>> +set_seq_num:
> >>> + pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no :
> >> num;
> >>> + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with
> >> SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n",
> >>> + (int64_t)pls->cur_seq_no, (int)pls->rep_idx);
> >>> + } else if (pls->fragment_duration > 0) {
> >>> + pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec *
> >> pls->fragment_timescale) / pls->fragment_duration) / 1000;
> >>> + } else {
> >>> + av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing
> >> fragment_duration\n");
> >>> + pls->cur_seq_no = pls->first_seq_no;
> >>> + }
> >>> + pls->cur_timestamp = 0;
> >>> + pls->cur_seg_offset = 0;
> >>> + pls->init_sec_buf_read_offset = 0;
> >>> + ret = reopen_demux_for_component(s, pls);
> >>> +
> >>> + return ret;
> >>> +}
> >>> +
> >>> +static int dash_read_seek(AVFormatContext *s, int stream_index,
> int64_t
> >> timestamp, int flags)
> >>> +{
> >>> + int ret = 0;
> >>> + DASHContext *c = s->priv_data;
> >>> + int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000,
> >>> + s->streams[stream_index]->
> >> time_base.den,
> >>> + flags & AVSEEK_FLAG_BACKWARD
> ?
> >>> + AV_ROUND_DOWN : AV_ROUND_UP);
> >>> + if ((flags & AVSEEK_FLAG_BYTE) || c->is_live)
> >>> + return AVERROR(ENOSYS);
> >>> + if (c->cur_audio) {
> >>> + ret = dash_seek(s, c->cur_audio, seek_pos_msec, flags);
> >>> + }
> >>> + if (!ret && c->cur_video) {
> >>> + ret = dash_seek(s, c->cur_video, seek_pos_msec, flags);
> >>> + }
> >>> + return ret;
> >>> +}
> >>> +
> >>> +static int dash_probe(AVProbeData *p)
> >>> +{
> >>> + if (!av_stristr(p->buf, "<MPD"))
> >>> + return 0;
> >>> +
> >>> + if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") ||
> >>> + av_stristr(p->buf, "dash:profile:isoff-live:2011") ||
> >>> + av_stristr(p->buf, "dash:profile:isoff-live:2012") ||
> >>> + av_stristr(p->buf, "dash:profile:isoff-main:2011")) {
> >>> + return AVPROBE_SCORE_MAX;
> >>> + }
> >>> + if (av_stristr(p->buf, "dash:profile")) {
> >>> + return AVPROBE_SCORE_MAX >> 1;
> >>> + }
> >>> +
> >>> + return 0;
> >>> +}
> >>> +
> >>> +#define OFFSET(x) offsetof(DASHContext, x)
> >>> +#define FLAGS AV_OPT_FLAG_DECODING_PARAM
> >>> +static const AVOption dash_options[] = {
> >>> + {"audio_rep_index", "audio representation index to be used",
> >> OFFSET(audio_rep_index), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX,
> >> FLAGS},
> >>> + {"video_rep_index", "video representation index to be used",
> >> OFFSET(video_rep_index), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX,
> >> FLAGS},
> >>> + {NULL}
> >>> +};
> >>> +
> >>> +static const AVClass dash_class = {
> >>> + .class_name = "dash",
> >>> + .item_name = av_default_item_name,
> >>> + .option = dash_options,
> >>> + .version = LIBAVUTIL_VERSION_INT,
> >>> +};
> >>> +
> >>> +AVInputFormat ff_dash_demuxer = {
> >>> + .name = "dash",
> >>> + .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming
> >> over HTTP"),
> >>> + .priv_class = &dash_class,
> >>> + .priv_data_size = sizeof(DASHContext),
> >>> + .read_probe = dash_probe,
> >>> + .read_header = dash_read_header,
> >>> + .read_packet = dash_read_packet,
> >>> + .read_close = dash_close,
> >>> + .read_seek = dash_read_seek,
> >>> + .flags = AVFMT_NO_BYTE_SEEK,
> >>> +};
> >>> --
> >>> 2.10.1 (Apple Git-78)
> >>>
> >>>
> >>>
> >>> _______________________________________________
> >>> ffmpeg-devel mailing list
> >>> ffmpeg-devel@ffmpeg.org
> >>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> >>
> >> _______________________________________________
> >> ffmpeg-devel mailing list
> >> ffmpeg-devel@ffmpeg.org <mailto:ffmpeg-devel@ffmpeg.org>
> >> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel <
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel>
> >>
> > _______________________________________________
> > ffmpeg-devel mailing list
> > ffmpeg-devel@ffmpeg.org <mailto:ffmpeg-devel@ffmpeg.org>
> > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel <
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel>
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
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