[FFmpeg-devel] [PATCH v4 2/2] avformat/dashdec: refine adaptionset attribute members
Steven Liu
lq at chinaffmpeg.org
Sat Mar 28 15:25:04 EET 2020
all the members is used check all the representation useable.
Signed-off-by: Steven Liu <lq at chinaffmpeg.org>
---
libavformat/dashdec.c | 203 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 199 insertions(+), 4 deletions(-)
diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c
index 271202b0a5..63caa696f8 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;
@@ -123,6 +124,16 @@ typedef struct DASHContext {
const AVClass *class;
char *base_url;
+ 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;
int n_audios;
@@ -156,6 +167,85 @@ typedef struct DASHContext {
} DASHContext;
+static int get_ratio_from_string(AVRational *dst, const char *src)
+{
+ char *end = NULL;
+ char *end_ptr = NULL;
+ long num, den;
+
+ num = strtol(src, &end_ptr, 10);
+ if (errno == ERANGE || end_ptr == src)
+ return AVERROR_INVALIDDATA;
+
+ if (num > INT_MAX)
+ return AVERROR_INVALIDDATA;
+
+ if (end_ptr[0] == '\0') {
+ dst->den = 1;
+ dst->num = (int)num;
+ return 0;
+ }
+
+ if (end_ptr[0] != '/')
+ return AVERROR_INVALIDDATA;
+
+ end_ptr++;
+ den = strtol(end_ptr, &end, 10);
+ if (errno == ERANGE || end == src)
+ return AVERROR_INVALIDDATA;
+
+ if (den > INT_MAX)
+ return AVERROR_INVALIDDATA;
+
+ dst->den = (int)den;
+
+ return 0;
+}
+
+static int dash_prop_get_uint64(AVFormatContext *s, xmlNodePtr node, uint64_t *dst, const char *key)
+{
+ char *end_ptr = NULL;
+ char *val = xmlGetProp(node, key);
+ int ret = 0;
+ uint64_t tmpval = 0;
+
+ if (val) {
+ tmpval = strtoull(val, &end_ptr, 10);
+ if (errno == ERANGE) {
+ av_log(s, AV_LOG_WARNING, "overflow/underflow when get value of %s\n", key);
+ ret = AVERROR_INVALIDDATA;
+ goto out;
+ }
+ 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);
+ ret = AVERROR_INVALIDDATA;
+ goto out;
+ }
+ *dst = tmpval;
+out:
+ 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);
@@ -872,6 +962,15 @@ 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");
@@ -1057,15 +1156,55 @@ 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;
+ }
+
+ if (dash_prop_get_uint64(s, representation_node, &width, "width") < 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, "will ignore representation %s, width is %"PRIu64".\n", rep_id_val, width);
+ free_representation(rep);
+ goto end;
+ }
+
+ if (dash_prop_get_uint64(s, representation_node, &height, "height") < 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, "will ignore representation %s, height is %"PRIu64".\n", rep_id_val, height);
+ free_representation(rep);
+ goto end;
+ }
+
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, "will ignore representation %s, framerate is %s.\n", rep_id_val, rep_framerate_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, "will ignore representation %s, framerate is %s.\n", rep_id_val, rep_framerate_val);
+ free_representation(rep);
+ goto end;
+ }
+ }
}
switch (type) {
@@ -1093,6 +1232,7 @@ 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)
@@ -1103,6 +1243,45 @@ 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_lang = xmlGetProp(adaptionset_node, "lang");
+
+ if (dash_prop_get_uint64(s, adaptionset_node, &c->adaptionset_minbw, "minBandwidth") < 0)
+ c->adaptionset_minbw = 0;
+
+ if (dash_prop_get_uint64(s, adaptionset_node, &c->adaptionset_maxbw, "maxBandwidth") < 0)
+ c->adaptionset_maxbw = UINT64_MAX;
+
+ if (dash_prop_get_uint64(s, adaptionset_node, &c->adaptionset_minwidth, "minWidth") < 0)
+ c->adaptionset_minwidth = 0;
+
+ if (dash_prop_get_uint64(s, adaptionset_node, &c->adaptionset_maxwidth, "maxWidth") < 0)
+ c->adaptionset_maxwidth = UINT64_MAX;
+
+ if (dash_prop_get_uint64(s, adaptionset_node, &c->adaptionset_minheight, "minHeight") < 0)
+ c->adaptionset_minheight = 0;
+
+ if (dash_prop_get_uint64(s, adaptionset_node, &c->adaptionset_maxheight, "maxHeight") < 0)
+ c->adaptionset_maxheight = UINT64_MAX;
+
+ if (dash_get_prop_ratio(s, adaptionset_node, &c->adaptionset_minframerate, "minFrameRate") < 0)
+ c->adaptionset_minframerate = av_make_q(0, 0);
+
+ if (dash_get_prop_ratio(s, adaptionset_node, &c->adaptionset_maxframerate, "maxFrameRate") < 0)
+ c->adaptionset_maxframerate = av_make_q(0, 0);
+
+ return ret;
+}
+
static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
xmlNodePtr adaptionset_node,
xmlNodePtr mpd_baseurl_node,
@@ -1111,6 +1290,7 @@ static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
xmlNodePtr period_segmentlist_node)
{
int ret = 0;
+ DASHContext *c = s->priv_data;
xmlNodePtr fragment_template_node = NULL;
xmlNodePtr content_component_node = NULL;
xmlNodePtr adaptionset_baseurl_node = NULL;
@@ -1118,6 +1298,10 @@ static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
xmlNodePtr adaptionset_supplementalproperty_node = NULL;
xmlNodePtr node = NULL;
+ ret = parse_manifest_adaptationset_attr(s, adaptionset_node);
+ if (ret < 0)
+ return ret;
+
node = xmlFirstElementChild(adaptionset_node);
while (node) {
if (!av_strcasecmp(node->name, (const char *)"SegmentTemplate")) {
@@ -1143,12 +1327,15 @@ 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)
@@ -2121,6 +2308,10 @@ 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];
@@ -2128,6 +2319,10 @@ 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);
+ }
}
}
--
2.25.0
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