[FFmpeg-devel] [PATCH]lavf/mpegts: Convert service name and service provider to utf-8

[Marton Balint]

On Sat, 9 Feb 2019, Carl Eugen Hoyos wrote:

> From 9033f0a18727a7a576c4cc06b9985d6d922d46ad Mon Sep 17 00:00:00 2001
> From: Carl Eugen Hoyos <ceffmpeg at gmail.com>
> Date: Sat, 9 Feb 2019 00:49:51 +0100
> Subject: [PATCH] lavf/mpegts: Convert service_name and service_provider to
>  utf-8.
> 
> Fixes ticket #6320.
> ---
>  libavformat/mpegts.c |   48 ++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 48 insertions(+)
> 
> Diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
> Index b04fd7b..1e27500 100644
> --- a/libavformat/mpegts.c
> +++ b/libavformat/mpegts.c
> @@ -37,6 +37,9 @@
>  #include "avio_internal.h"
>  #include "mpeg.h"
>  #include "isom.h"
> +#if CONFIG_ICONV
> +#include <iconv.h>
> +#endif
>
>  /* maximum size in which we look for synchronization if
>   * synchronization is lost */
> @@ -674,6 +677,51 @@ static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
>          return NULL;
>      if (len > p_end - p)
>          return NULL;
> +#if CONFIG_ICONV
> +    if (len && *p < 0x20) {
> +        char iso8859[] = "ISO-8859-00";
> +        const char *encodings[] = {
> +            "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7", "ISO-8859-8",
> +            "ISO-8859-9", "ISO-8859-10", "ISO-8859-11", "", "ISO-8859-13",
> +            "ISO-8859-14", "ISO-8859-15", "", "", "", "",
> +            "", "ISO-10646", "KSC_5601", "GB2312", "ISO-10646", "UTF-8", "",
> +            "", "", "", "", "", "", "", "", ""
> +        };
> +        iconv_t cd;
> +        char *in, *out;
> +        size_t inlen = len - 1, outlen = inlen * 6 + 1;
> +        if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
> +            if (p[2] < 10) {
> +                iso8859[9] += p[2];
> +                iso8859[10] = 0;
> +            } else {
> +                iso8859[9]++;
> +                iso8859[10] += p[2] - 10;
> +            }

I think this would be much more readable:

char iso8859[16];
snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);

Also inlen should be len - 3 here, no?

> +            in = (char *)p + 3;
> +            cd = iconv_open("UTF-8", iso8859);
> +        } else {
> +            in = (char *)p + 1;
> +            cd = iconv_open("UTF-8", encodings[*p]);
> +        }
> +        if (cd == (iconv_t)-1)
> +            goto no_iconv;
> +        str = out = av_malloc(outlen);
> +        if (!str) {
> +            iconv_close(cd);
> +            return NULL;
> +        }
> +        if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
> +            iconv_close(cd);

You are leaking str here.

> +            goto no_iconv;
> +        }
> +        iconv_close(cd);
> +        *out = 0;
> +        *pp = p + len;
> +        return str;
> +    }
> +no_iconv:
> +#endif
>      str = av_malloc(len + 1);
>      if (!str)
>          return NULL;
> -- 
> 1.7.10.4

Thanks,
Marton