On 2/23/19, Steve Lhomme <rob...@ycbcr.xyz> wrote:
> From: Steve Lhomme <rob...@ycbcr.xyz>
>
> ---
> libavformat/matroskadec.c | 12 +++++++-----
> 1 file changed, 7 insertions(+), 5 deletions(-)
>
> diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
> index 5aa8a105dc..0e3a6890c1 100644
> --- a/libavformat/matroskadec.c
> +++ b/libavformat/matroskadec.c
> @@ -68,6 +68,8 @@
>
> #include "qtpalette.h"
>
> +#define EBML_UNKNOWN_LENGTH UINT64_MAX /* EBML unknown length, in uint64_t
> */
> +
> typedef enum {
> EBML_NONE,
> EBML_UINT,
> @@ -869,7 +871,7 @@ static int ebml_read_length(MatroskaDemuxContext
> *matroska, AVIOContext *pb,
> {
> int res = ebml_read_num(matroska, pb, 8, number);
> if (res > 0 && *number + 1 == 1ULL << (7 * res))
> - *number = 0xffffffffffffffULL;
> + *number = EBML_UNKNOWN_LENGTH;
> return res;
> }
>
> @@ -1049,7 +1051,7 @@ static int ebml_parse_id(MatroskaDemuxContext
> *matroska, EbmlSyntax *syntax,
> break;
> if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
> matroska->num_levels > 0 &&
> - matroska->levels[matroska->num_levels - 1].length ==
> 0xffffffffffffff)
> + matroska->levels[matroska->num_levels - 1].length ==
> EBML_UNKNOWN_LENGTH)
> return 0; // we reached the end of an unknown size cluster
> if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
> av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n",
> id);
> @@ -1201,7 +1203,7 @@ static int ebml_parse_elem(MatroskaDemuxContext
> *matroska,
> MatroskaLevel *level = &matroska->levels[matroska->num_levels -
> 1];
> AVIOContext *pb = matroska->ctx->pb;
> int64_t pos = avio_tell(pb);
> - if (level->length != (uint64_t) -1 &&
> + if (level->length != EBML_UNKNOWN_LENGTH &&
> (pos + length) > (level->start + level->length)) {
> av_log(matroska->ctx, AV_LOG_ERROR,
> "Invalid length 0x%"PRIx64" > 0x%"PRIx64" in
> parent\n",
> @@ -1610,7 +1612,7 @@ static int
> matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
> ret = AVERROR_INVALIDDATA;
> } else {
> level.start = 0;
> - level.length = (uint64_t) -1;
> + level.length = EBML_UNKNOWN_LENGTH;
> matroska->levels[matroska->num_levels] = level;
> matroska->num_levels++;
> matroska->current_id = 0;
> @@ -1620,7 +1622,7 @@ static int
> matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
> /* remove dummy level */
> while (matroska->num_levels) {
> uint64_t length =
> matroska->levels[--matroska->num_levels].length;
> - if (length == (uint64_t) -1)
> + if (length == EBML_UNKNOWN_LENGTH)
> break;
> }
> }
> --
> 2.18.0
>
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
lgtm
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