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avformat/mov: Simplify cleanup after read_header failure

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By default, a demuxer's read_close function is not called automatically
if an error happens when reading the header; instead it is up to the
demuxer to clean up after itself in this case. The mov demuxer did this
by calling its read_close function when it encountered some errors when
reading the header.

This commit changes this by setting the FF_FMT_INIT_CLEANUP flag so that
mov_read_close() is automatically called when an error happens when
reading the header.

(Btw: mov_read_close() is not idempotent: Calling it twice is
dangerouos, because MOVContext.frag_index.item will be av_freep'ed,
yet MOVContext.frag_index.nb_items won't be reset. So the calls to
mov_read_close() have to be removed before the switch to freeing
generically.)

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2020-03-21 21:52:43 +01:00
parent cc768bf7e4
commit c6e9672b50
1 changed files with 12 additions and 17 deletions
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29
libavformat/mov.c
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@ -7556,13 +7556,12 @@ static int mov_read_header(AVFormatContext *s)
avio_seek(pb, 0, SEEK_SET);
if ((err = mov_read_default(mov, pb, atom)) < 0) {
av_log(s, AV_LOG_ERROR, "error reading header\n");
goto fail;
return err;
}
} while ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mov->found_moov && !mov->moov_retry++);
if (!mov->found_moov) {
av_log(s, AV_LOG_ERROR, "moov atom not found\n");
err = AVERROR_INVALIDDATA;
goto fail;
return AVERROR_INVALIDDATA;
}
av_log(mov->fc, AV_LOG_TRACE, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
@ -7616,7 +7615,7 @@ static int mov_read_header(AVFormatContext *s)
}
if (st->codecpar->codec_id == AV_CODEC_ID_DVD_SUBTITLE) {
if ((err = mov_rewrite_dvd_sub_extradata(st)) < 0)
goto fail;
return err;
}
}
if (mov->handbrake_version &&
@ -7635,8 +7634,7 @@ static int mov_read_header(AVFormatContext *s)
if (sc->data_size > INT64_MAX / sc->time_scale / 8) {
av_log(s, AV_LOG_ERROR, "Overflow during bit rate calculation %"PRId64" * 8 * %d\n",
sc->data_size, sc->time_scale);
err = AVERROR_INVALIDDATA;
goto fail;
return AVERROR_INVALIDDATA;
}
st->codecpar->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
}
@ -7651,8 +7649,7 @@ static int mov_read_header(AVFormatContext *s)
if (sc->data_size > INT64_MAX / sc->time_scale / 8) {
av_log(s, AV_LOG_ERROR, "Overflow during bit rate calculation %"PRId64" * 8 * %d\n",
sc->data_size, sc->time_scale);
err = AVERROR_INVALIDDATA;
goto fail;
return AVERROR_INVALIDDATA;
}
st->codecpar->bit_rate = sc->data_size * 8 * sc->time_scale /
sc->duration_for_fps;
@ -7676,14 +7673,14 @@ static int mov_read_header(AVFormatContext *s)
case AVMEDIA_TYPE_AUDIO:
err = ff_replaygain_export(st, s->metadata);
if (err < 0)
goto fail;
return err;
break;
case AVMEDIA_TYPE_VIDEO:
if (sc->display_matrix) {
err = av_stream_add_side_data(st, AV_PKT_DATA_DISPLAYMATRIX, (uint8_t*)sc->display_matrix,
sizeof(int32_t) * 9);
if (err < 0)
goto fail;
return err;
sc->display_matrix = NULL;
}
@ -7692,7 +7689,7 @@ static int mov_read_header(AVFormatContext *s)
(uint8_t *)sc->stereo3d,
sizeof(*sc->stereo3d));
if (err < 0)
goto fail;
return err;
sc->stereo3d = NULL;
}
@ -7701,7 +7698,7 @@ static int mov_read_header(AVFormatContext *s)
(uint8_t *)sc->spherical,
sc->spherical_size);
if (err < 0)
goto fail;
return err;
sc->spherical = NULL;
}
@ -7710,7 +7707,7 @@ static int mov_read_header(AVFormatContext *s)
(uint8_t *)sc->mastering,
sizeof(*sc->mastering));
if (err < 0)
goto fail;
return err;
sc->mastering = NULL;
}
@ -7719,7 +7716,7 @@ static int mov_read_header(AVFormatContext *s)
(uint8_t *)sc->coll,
sc->coll_size);
if (err < 0)
goto fail;
return err;
sc->coll = NULL;
}
@ -7733,9 +7730,6 @@ static int mov_read_header(AVFormatContext *s)
mov->frag_index.item[i].headers_read = 1;
return 0;
fail:
mov_read_close(s);
return err;
}
static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
@ -8205,6 +8199,7 @@ const AVInputFormat ff_mov_demuxer = {
.priv_class = &mov_class,
.priv_data_size = sizeof(MOVContext),
.extensions = "mov,mp4,m4a,3gp,3g2,mj2,psp,m4b,ism,ismv,isma,f4v",
.flags_internal = FF_FMT_INIT_CLEANUP,
.read_probe = mov_probe,
.read_header = mov_read_header,
.read_packet = mov_read_packet,