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avformat/segafilm: Simplify cleanup after read_header failure 

by setting the FF_FMT_INIT_CLEANUP flag.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2020-03-21 18:31:06 +01:00
parent 9ef7582446
commit 5542f78d46
1 changed files with 6 additions and 12 deletions
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18
libavformat/segafilm.c
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@ -90,7 +90,7 @@ static int film_read_header(AVFormatContext *s)
AVIOContext *pb = s->pb;
AVStream *st;
unsigned char scratch[256];
int i, ret;
int i;
unsigned int data_offset;
unsigned int audio_frame_counter;
unsigned int video_frame_counter;
@ -216,17 +216,13 @@ static int film_read_header(AVFormatContext *s)
audio_frame_counter = video_frame_counter = 0;
for (i = 0; i < film->sample_count; i++) {
/* load the next sample record and transfer it to an internal struct */
if (avio_read(pb, scratch, 16) != 16) {
ret = AVERROR(EIO);
goto fail;
}
if (avio_read(pb, scratch, 16) != 16)
return AVERROR(EIO);
film->sample_table[i].sample_offset =
data_offset + AV_RB32(&scratch[0]);
film->sample_table[i].sample_size = AV_RB32(&scratch[4]);
if (film->sample_table[i].sample_size > INT_MAX / 4) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
if (film->sample_table[i].sample_size > INT_MAX / 4)
return AVERROR_INVALIDDATA;
if (AV_RB32(&scratch[8]) == 0xFFFFFFFF) {
film->sample_table[i].stream = film->audio_stream_index;
film->sample_table[i].pts = audio_frame_counter;
@ -260,9 +256,6 @@ static int film_read_header(AVFormatContext *s)
film->current_sample = 0;
return 0;
fail:
film_read_close(s);
return ret;
}
static int film_read_packet(AVFormatContext *s,
@ -335,6 +328,7 @@ const AVInputFormat ff_segafilm_demuxer = {
.name = "film_cpk",
.long_name = NULL_IF_CONFIG_SMALL("Sega FILM / CPK"),
.priv_data_size = sizeof(FilmDemuxContext),
.flags_internal = FF_FMT_INIT_CLEANUP,
.read_probe = film_probe,
.read_header = film_read_header,
.read_packet = film_read_packet,