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avformat/imfdec: do not use filesize when reading XML file 

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2022-01-01 20:05:59 +01:00
parent 47c4df2203
commit ae690d5cf5
1 changed files with 4 additions and 11 deletions
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15
libavformat/imfdec.c
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@ -73,8 +73,6 @@
#include <inttypes.h>
#include <libxml/parser.h>
#define MAX_BPRINT_READ_SIZE (UINT_MAX - 1)
#define DEFAULT_ASSETMAP_SIZE 8 * 1024
#define AVRATIONAL_FORMAT "%d/%d"
#define AVRATIONAL_ARG(rational) rational.num, rational.den
@ -279,7 +277,6 @@ static int parse_assetmap(AVFormatContext *s, const char *url)
const char *base_url;
char *tmp_str = NULL;
int ret;
int64_t filesize;
av_log(s, AV_LOG_DEBUG, "Asset Map URL: %s\n", url);
@ -289,13 +286,10 @@ static int parse_assetmap(AVFormatContext *s, const char *url)
if (ret < 0)
return ret;
filesize = avio_size(in);
filesize = filesize > 0 ? filesize : DEFAULT_ASSETMAP_SIZE;
av_bprint_init(&buf, 0, INT_MAX); // xmlReadMemory uses integer length
av_bprint_init(&buf, filesize + 1, AV_BPRINT_SIZE_UNLIMITED);
ret = avio_read_to_bprint(in, &buf, MAX_BPRINT_READ_SIZE);
if (ret < 0 || !avio_feof(in) || buf.len == 0) {
ret = avio_read_to_bprint(in, &buf, SIZE_MAX);
if (ret < 0 || !avio_feof(in)) {
av_log(s, AV_LOG_ERROR, "Unable to read to asset map '%s'\n", url);
if (ret == 0)
ret = AVERROR_INVALIDDATA;
@ -311,8 +305,7 @@ static int parse_assetmap(AVFormatContext *s, const char *url)
}
base_url = av_dirname(tmp_str);
filesize = buf.len;
doc = xmlReadMemory(buf.str, filesize, url, NULL, 0);
doc = xmlReadMemory(buf.str, buf.len, url, NULL, 0);
ret = parse_imf_asset_map_from_xml_dom(s, doc, &c->asset_locator_map, base_url);
if (!ret)