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avformat/hlsenc: check dirname and fix vtt problem 

fix ticket: 7527
check dirname before use it
refine webvtt code in the hls_delete_old_segments

Reported-by: caspy
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>
This commit is contained in:
Steven Liu 2018-11-12 17:42:12 +08:00
parent 26772b789b
commit 43cc2e39c0
1 changed files with 14 additions and 5 deletions
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19
libavformat/hlsenc.c
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@ -415,6 +415,7 @@ static int hls_delete_old_segments(AVFormatContext *s, HLSContext *hls,
int segment_cnt = 0;
char *dirname = NULL, *p, *sub_path;
char *path = NULL;
char *vtt_dirname = NULL;
AVDictionary *options = NULL;
AVIOContext *out = NULL;
const char *proto = NULL;
@ -461,7 +462,7 @@ static int hls_delete_old_segments(AVFormatContext *s, HLSContext *hls,
char * r_dirname = dirname;
/* if %v is present in the file's directory */
if (av_stristr(dirname, "%v")) {
if (dirname && av_stristr(dirname, "%v")) {
if (replace_int_data_in_filename(&r_dirname, dirname, 'v', segment->var_stream_idx) < 1) {
ret = AVERROR(EINVAL);
@ -499,23 +500,30 @@ static int hls_delete_old_segments(AVFormatContext *s, HLSContext *hls,
}
if ((segment->sub_filename[0] != '\0')) {
sub_path_size = strlen(segment->sub_filename) + 1 + (dirname ? strlen(dirname) : 0);
vtt_dirname = av_strdup(vs->vtt_avf->url);
if (!vtt_dirname) {
ret = AVERROR(ENOMEM);
goto fail;
}
p = (char *)av_basename(vtt_dirname);
*p = '\0';
sub_path_size = strlen(segment->sub_filename) + 1 + (vtt_dirname ? strlen(vtt_dirname) : 0);
sub_path = av_malloc(sub_path_size);
if (!sub_path) {
ret = AVERROR(ENOMEM);
goto fail;
}
av_strlcpy(sub_path, dirname, sub_path_size);
av_strlcpy(sub_path, vtt_dirname, sub_path_size);
av_strlcat(sub_path, segment->sub_filename, sub_path_size);
if (hls->method || (proto && !av_strcasecmp(proto, "http"))) {
av_dict_set(&options, "method", "DELETE", 0);
if ((ret = vs->avf->io_open(vs->avf, &out, sub_path, AVIO_FLAG_WRITE, &options)) < 0) {
if ((ret = vs->vtt_avf->io_open(vs->vtt_avf, &out, sub_path, AVIO_FLAG_WRITE, &options)) < 0) {
av_free(sub_path);
goto fail;
}
ff_format_io_close(vs->avf, &out);
ff_format_io_close(vs->vtt_avf, &out);
} else if (unlink(sub_path) < 0) {
av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
sub_path, strerror(errno));
@ -531,6 +539,7 @@ static int hls_delete_old_segments(AVFormatContext *s, HLSContext *hls,
fail:
av_free(path);
av_free(dirname);
av_free(vtt_dirname);
return ret;
}