Steven Liu (12020-03-24):
> These member will be used for get more correct information of the MPD
>
> Suggested-by: Andreas Rheinhardt <andreas.rheinha...@gmail.com>
> Suggested-by: Nicolas George <geo...@nsup.org>
> Signed-off-by: Steven Liu <l...@chinaffmpeg.org>
> ---
> libavformat/dashdec.c | 244 ++++++++++++++++++++++++++++++++++++------
> 1 file changed, 214 insertions(+), 30 deletions(-)
>
> diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c
> index 5bbe5d3985..b5bb8e674c 100644
> --- a/libavformat/dashdec.c
> +++ b/libavformat/dashdec.c
> @@ -108,6 +108,7 @@ struct representation {
> int64_t cur_seg_offset;
> int64_t cur_seg_size;
> struct fragment *cur_seg;
> + char *lang;
>
> /* Currently active Media Initialization Section */
> struct fragment *init_section;
> @@ -122,19 +123,15 @@ struct representation {
> typedef struct DASHContext {
> const AVClass *class;
> char *base_url;
> - char *adaptionset_contenttype_val;
> - char *adaptionset_par_val;
> - char *adaptionset_lang_val;
> - char *adaptionset_minbw_val;
> - char *adaptionset_maxbw_val;
> - char *adaptionset_minwidth_val;
> - char *adaptionset_maxwidth_val;
> - char *adaptionset_minheight_val;
> - char *adaptionset_maxheight_val;
> - char *adaptionset_minframerate_val;
> - char *adaptionset_maxframerate_val;
> - char *adaptionset_segmentalignment_val;
> - char *adaptionset_bitstreamswitching_val;
> + char *adaptionset_lang;
> + uint64_t adaptionset_minbw;
> + uint64_t adaptionset_maxbw;
> + uint64_t adaptionset_minwidth;
> + uint64_t adaptionset_maxwidth;
> + uint64_t adaptionset_minheight;
> + uint64_t adaptionset_maxheight;
> + AVRational adaptionset_minframerate;
> + AVRational adaptionset_maxframerate;
>
> int n_videos;
> struct representation **videos;
> @@ -169,6 +166,79 @@ typedef struct DASHContext {
>
> } DASHContext;
>
> +static int get_ratio_from_string(AVRational *dst, char *src)
const char *
> +{
> + char *p = src;
Not useful.
> + char *end = NULL;
> + char *end_ptr = NULL;
> + int num, den;
> +
> + num = (int)strtol(p, &end_ptr, 10);
Possible integer overflow.
> + if (errno == ERANGE || end_ptr == src) {
> + return AVERROR_INVALIDDATA;
> + }
Unnecessary braces.
> +
> + if (end_ptr[0] == '\0') {
> + dst->den = 1;
> + dst->num = num;
> + return 0;
> + }
> +
> + if (end_ptr[0] != '/')
> + return AVERROR_INVALIDDATA;
> + p = end_ptr + 1;
Not useful.
> + den = (int)strtol(p, &end, 10);
Possible integer overflow.
> + if (errno == ERANGE || end == src) {
> + dst->den = 1;
Why?
> + return AVERROR_INVALIDDATA;
> + }
> + dst->den = den;
> +
> + return 0;
> +}
> +
> +static uint64_t dash_prop_get_int64(AVFormatContext *s, xmlNodePtr node,
> uint64_t *dst, const char *key)
The return type does not work.
> +{
> + char *end_ptr = NULL;
> + char *val = xmlGetProp(node, key);
> + int ret = 0;
> +
> + if (val) {
> + ret = strtoull(val, &end_ptr, 10);
Can't store unsigned long long into int.
> + if (errno == ERANGE) {
> + av_log(s, AV_LOG_WARNING, "overflow/underflow when get value of
> %s\n", key);
> + xmlFree(val);
> + return AVERROR_INVALIDDATA;
> + }
> + if (end_ptr == val || end_ptr[0] != '\0') {
> + av_log(s, AV_LOG_ERROR, "The %s field value is "
> + "not a valid number: %s\n", key, val);
> + xmlFree(val);
> + return AVERROR_INVALIDDATA;
> + }
> + *dst = ret;
> + xmlFree(val);
> + }
> + return ret;
> +}
> +
> +static int dash_get_prop_ratio(AVFormatContext *s, xmlNodePtr node,
> AVRational *member, const char *key)
> +{
> + char *val = xmlGetProp(node, key);
> + int ret = 0;
> + AVRational rate;
> +
> + if (val) {
> + ret = get_ratio_from_string(&rate, val);
> + if (ret < 0)
> + av_log(s, AV_LOG_WARNING, "Ignoring invalid %s frame rate
> '%s'\n", key, val);
> + xmlFree(val);
> + }
> + member->num = rate.num;
> + member->den = rate.den;
> + return ret;
> +}
> +
> static int ishttp(char *url)
> {
> const char *proto_name = avio_find_protocol_name(url);
> @@ -885,6 +955,15 @@ static int parse_manifest_representation(AVFormatContext
> *s, const char *url,
> ret = AVERROR(ENOMEM);
> goto end;
> }
> + if (c->adaptionset_lang) {
> + rep->lang = av_strdup(c->adaptionset_lang);
> + if (!rep->lang) {
> + av_log(s, AV_LOG_ERROR, "alloc language memory failure\n");
> + av_freep(&rep);
> + ret = AVERROR(ENOMEM);
> + goto end;
> + }
> + }
> rep->parent = s;
> representation_segmenttemplate_node =
> find_child_node_by_name(representation_node, "SegmentTemplate");
> representation_baseurl_node =
> find_child_node_by_name(representation_node, "BaseURL");
> @@ -1070,15 +1149,61 @@ static int
> parse_manifest_representation(AVFormatContext *s, const char *url,
> }
>
> if (rep) {
> + uint64_t width = 0;
> + uint64_t height = 0;
> +
> if (rep->fragment_duration > 0 && !rep->fragment_timescale)
> rep->fragment_timescale = 1;
> rep->bandwidth = rep_bandwidth_val ? atoi(rep_bandwidth_val) : 0;
> + if (rep_bandwidth_val && (rep->bandwidth > c->adaptionset_maxbw
> || rep->bandwidth < c->adaptionset_minbw)) {
> + av_log(s, AV_LOG_WARNING, "The bandwidth of representation
> %s is incorrect, "
> + "will ignore this representation.\n", rep_id_val);
> + free_representation(rep);
> + goto end;
> + }
> +
> + ret = dash_prop_get_int64(s, representation_node, &width,
> "width");
> + if (ret < 0)
> + av_log(s, AV_LOG_WARNING, "Ignoring the width of
> representation %s is incorrect.\n", rep_id_val);
> + if (width > c->adaptionset_maxwidth || width <
> c->adaptionset_minwidth) {
> + av_log(s, AV_LOG_WARNING, "Ignoring width of representation
> %s is incorrect, "
> + "will ignore this representation.\n", rep_id_val);
> + free_representation(rep);
> + goto end;
> + }
> +
> + ret = dash_prop_get_int64(s, representation_node, &height,
> "height");
> + if (ret < 0)
> + av_log(s, AV_LOG_WARNING, "Ignoring the height of
> representation %s is incorrect.\n", rep_id_val);
> + if (height > c->adaptionset_maxheight || height <
> c->adaptionset_minheight) {
> + av_log(s, AV_LOG_WARNING, "Ignoring height of representation
> %s is incorrect, "
> + "will ignore this representation.\n", rep_id_val);
> + free_representation(rep);
> + goto end;
> + }
> +
Looks unrelated.
> strncpy(rep->id, rep_id_val ? rep_id_val : "", sizeof(rep->id));
> rep->framerate = av_make_q(0, 0);
> if (type == AVMEDIA_TYPE_VIDEO && rep_framerate_val) {
> - ret = av_parse_video_rate(&rep->framerate,
> rep_framerate_val);
> + ret = get_ratio_from_string(&rep->framerate,
> rep_framerate_val);
> if (ret < 0)
> - av_log(s, AV_LOG_VERBOSE, "Ignoring invalid frame rate
> '%s'\n", rep_framerate_val);
> + av_log(s, AV_LOG_WARNING, "Ignoring invalid frame rate
> '%s'\n", rep_framerate_val);
> + if (c->adaptionset_maxframerate.num > 0) {
> + if (av_cmp_q(rep->framerate,
> c->adaptionset_maxframerate) == 1) {
> + av_log(s, AV_LOG_WARNING, "Ignoring frame rate of
> representation %s incorrect, "
> + "will ignore this representation.\n", rep_id_val);
> + free_representation(rep);
> + goto end;
> + }
> + }
> + if (c->adaptionset_minframerate.num > 0) {
> + if (av_cmp_q(rep->framerate,
> c->adaptionset_minframerate) == -1) {
> + av_log(s, AV_LOG_WARNING, "Ignoring frame rate of
> representation %s incorrect, "
> + "will ignore this representation.\n", rep_id_val);
> + free_representation(rep);
> + goto end;
> + }
> + }
This is changing the behavior. I don't know if it is in the desirable
direction.
> }
>
> switch (type) {
> @@ -1106,6 +1231,7 @@ static int
> parse_manifest_representation(AVFormatContext *s, const char *url,
> subtitle_rep_idx += type == AVMEDIA_TYPE_SUBTITLE;
>
> end:
> +
> if (rep_id_val)
> xmlFree(rep_id_val);
> if (rep_bandwidth_val)
> @@ -1116,6 +1242,62 @@ end:
> return ret;
> }
>
> +static int parse_manifest_adaptationset_attr(AVFormatContext *s, xmlNodePtr
> adaptionset_node)
> +{
> + int ret = 0;
> + DASHContext *c = s->priv_data;
> +
> + if (!adaptionset_node) {
> + av_log(s, AV_LOG_WARNING, "Cannot get AdaptionSet\n");
> + return AVERROR(EINVAL);
> + }
> + c->adaptionset_minframerate = av_make_q(0, 0);
> + c->adaptionset_maxframerate = av_make_q(0, 0);
> + c->adaptionset_maxbw = UINT64_MAX;
> + c->adaptionset_minbw = 0;
> + c->adaptionset_minwidth = 0;
> + c->adaptionset_maxwidth = UINT64_MAX;
> + c->adaptionset_minheight = 0;
> + c->adaptionset_maxheight = UINT64_MAX;
> +
> + c->adaptionset_lang = xmlGetProp(adaptionset_node, "lang");
> +
> + ret = dash_prop_get_int64(s, adaptionset_node, &c->adaptionset_minbw,
> "minBandwidth");
> + if (ret < 0)
> + c->adaptionset_minbw = 0;
> +
> + ret = dash_prop_get_int64(s, adaptionset_node, &c->adaptionset_maxbw,
> "maxBandwidth");
> + if (ret <= 0)
> + c->adaptionset_maxbw = UINT64_MAX;
> +
> + ret = dash_prop_get_int64(s, adaptionset_node, &c->adaptionset_minwidth,
> "minWidth");
> + if (ret < 0)
> + c->adaptionset_minwidth = 0;
> +
> + ret = dash_prop_get_int64(s, adaptionset_node, &c->adaptionset_maxwidth,
> "maxWidth");
> + if (ret <= 0)
> + c->adaptionset_maxwidth = UINT64_MAX;
> +
> + ret = dash_prop_get_int64(s, adaptionset_node,
> &c->adaptionset_minheight, "minHeight");
> + if (ret < 0)
> + c->adaptionset_minheight = 0;
> +
> + ret = dash_prop_get_int64(s, adaptionset_node,
> &c->adaptionset_maxheight, "maxHeight");
> + if (ret <= 0)
> + c->adaptionset_maxheight = UINT64_MAX;
> +
> + ret = dash_get_prop_ratio(s, adaptionset_node,
> &c->adaptionset_minframerate, "minFrameRate");
> + if (ret < 0) {
> + c->adaptionset_minframerate = av_make_q(0, 0);
> + }
> +
> + ret = dash_get_prop_ratio(s, adaptionset_node,
> &c->adaptionset_maxframerate, "maxFrameRate");
> + if (ret < 0)
> + c->adaptionset_maxframerate = av_make_q(0, 0);
If you don't actually use the return code, then have the function use a
default value directly, that will make the code more compact.
> +
> + return ret;
> +}
> +
> static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
> xmlNodePtr adaptionset_node,
> xmlNodePtr mpd_baseurl_node,
> @@ -1131,19 +1313,10 @@ static int
> parse_manifest_adaptationset(AVFormatContext *s, const char *url,
> xmlNodePtr adaptionset_segmentlist_node = NULL;
> xmlNodePtr adaptionset_supplementalproperty_node = NULL;
> xmlNodePtr node = NULL;
> - c->adaptionset_contenttype_val = xmlGetProp(adaptionset_node,
> "contentType");
> - c->adaptionset_par_val = xmlGetProp(adaptionset_node, "par");
> - c->adaptionset_lang_val = xmlGetProp(adaptionset_node, "lang");
> - c->adaptionset_minbw_val = xmlGetProp(adaptionset_node, "minBandwidth");
> - c->adaptionset_maxbw_val = xmlGetProp(adaptionset_node, "maxBandwidth");
> - c->adaptionset_minwidth_val = xmlGetProp(adaptionset_node, "minWidth");
> - c->adaptionset_maxwidth_val = xmlGetProp(adaptionset_node, "maxWidth");
> - c->adaptionset_minheight_val = xmlGetProp(adaptionset_node, "minHeight");
> - c->adaptionset_maxheight_val = xmlGetProp(adaptionset_node, "maxHeight");
> - c->adaptionset_minframerate_val = xmlGetProp(adaptionset_node,
> "minFrameRate");
> - c->adaptionset_maxframerate_val = xmlGetProp(adaptionset_node,
> "maxFrameRate");
> - c->adaptionset_segmentalignment_val = xmlGetProp(adaptionset_node,
> "segmentAlignment");
> - c->adaptionset_bitstreamswitching_val = xmlGetProp(adaptionset_node,
> "bitstreamSwitching");
> +
> + ret = parse_manifest_adaptationset_attr(s, adaptionset_node);
> + if (ret < 0)
> + return ret;
>
> node = xmlFirstElementChild(adaptionset_node);
> while (node) {
> @@ -1170,12 +1343,15 @@ static int
> parse_manifest_adaptationset(AVFormatContext *s, const char *url,
> adaptionset_segmentlist_node,
>
> adaptionset_supplementalproperty_node);
> if (ret < 0) {
> - return ret;
> + goto end;
> }
> }
> node = xmlNextElementSibling(node);
> }
> - return 0;
> +
> +end:
> + av_freep(&c->adaptionset_lang);
> + return ret;
> }
>
> static int parse_programinformation(AVFormatContext *s, xmlNodePtr node)
> @@ -2148,6 +2324,10 @@ static int dash_read_header(AVFormatContext *s)
> av_dict_set_int(&rep->assoc_stream->metadata,
> "variant_bitrate", rep->bandwidth, 0);
> if (rep->id[0])
> av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
> + if (rep->lang) {
> + av_dict_set(&rep->assoc_stream->metadata, "lang", rep->lang,
> 0);
> + av_freep(&rep->lang);
> + }
> }
> for (i = 0; i < c->n_subtitles; i++) {
> rep = c->subtitles[i];
> @@ -2155,6 +2335,10 @@ static int dash_read_header(AVFormatContext *s)
> rep->assoc_stream = s->streams[rep->stream_index];
> if (rep->id[0])
> av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
> + if (rep->lang) {
> + av_dict_set(&rep->assoc_stream->metadata, "lang", rep->lang,
> 0);
> + av_freep(&rep->lang);
> + }
> }
> }
>
Regards,
--
Nicolas George
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