Re: [FFmpeg-devel] [PATCH v3] avformat/hls: Return error code when read key file failed

[Andreas Rheinhardt <andreas.rheinhardt@outlook.com>]

Zhao Zhili:
> From: Zhao Zhili <zhilizhao@tencent.com>
> 
> ---
>  libavformat/hls.c | 47 ++++++++++++++++++++++++++++++++++-------------
>  1 file changed, 34 insertions(+), 13 deletions(-)
> 
> diff --git a/libavformat/hls.c b/libavformat/hls.c
> index 6623c80309..fe908a563b 100644
> --- a/libavformat/hls.c
> +++ b/libavformat/hls.c
> @@ -1331,6 +1331,37 @@ static void intercept_id3(struct playlist *pls, uint8_t *buf,
>          pls->is_id3_timestamped = (pls->id3_mpegts_timestamp != AV_NOPTS_VALUE);
>  }
>  
> +static int read_key(HLSContext *c, struct playlist *pls, struct segment *seg)
> +{
> +    AVIOContext *pb = NULL;
> +
> +    int ret = open_url(pls->parent, &pb, seg->key, &c->avio_opts, NULL, NULL);
> +    if (ret < 0) {
> +        av_log(pls->parent, AV_LOG_ERROR, "Unable to open key file %s, %s\n",
> +               seg->key, av_err2str(ret));
> +        return ret;
> +    }
> +
> +    ret = avio_read(pb, pls->key, sizeof(pls->key));
> +    ff_format_io_close(pls->parent, &pb);
> +    if (ret != sizeof(pls->key)) {
> +        if (ret < 0) {
> +            av_log(pls->parent, AV_LOG_ERROR, "Unable to read key file %s, %s\n",
> +                   seg->key, av_err2str(ret));
> +        } else {
> +            av_log(pls->parent, AV_LOG_ERROR, "Unable to read key file %s, read bytes %d != %zu\n",

SIZE_SPECIFIER

Apart from that: Do we really need to two different log messages?

> +                   seg->key, ret, sizeof(pls->key));
> +            ret = AVERROR(AVERROR_INVALIDDATA);

AVERROR() is wrong.

> +        }
> +
> +        return ret;
> +    }
> +
> +    av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
> +
> +    return 0;
> +}
> +
>  static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg, AVIOContext **in)
>  {
>      AVDictionary *opts = NULL;
> @@ -1352,19 +1383,9 @@ static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg,
>  
>      if (seg->key_type == KEY_AES_128 || seg->key_type == KEY_SAMPLE_AES) {
>          if (strcmp(seg->key, pls->key_url)) {
> -            AVIOContext *pb = NULL;
> -            if (open_url(pls->parent, &pb, seg->key, &c->avio_opts, NULL, NULL) == 0) {
> -                ret = avio_read(pb, pls->key, sizeof(pls->key));
> -                if (ret != sizeof(pls->key)) {
> -                    av_log(pls->parent, AV_LOG_ERROR, "Unable to read key file %s\n",
> -                           seg->key);
> -                }
> -                ff_format_io_close(pls->parent, &pb);
> -            } else {
> -                av_log(pls->parent, AV_LOG_ERROR, "Unable to open key file %s\n",
> -                       seg->key);
> -            }
> -            av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
> +            ret = read_key(c, pls, seg);
> +            if (ret < 0)
> +                goto cleanup;
>          }
>      }
>  

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