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Code Issues Releases Activity

avformat/dhav: Remove end_ prefix from variable names

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The end_ prefix is confusing and may have contributed the mixup
fixed in the previous commit

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2025-07-28 15:38:11 +02:00
parent 33ae6cda71
commit a408b74977
1 changed files with 18 additions and 18 deletions
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36
libavformat/dhav.c
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@ -241,12 +241,12 @@ static int64_t get_duration(AVFormatContext *s)
return 0;
int64_t start_pos = avio_tell(s->pb);
int64_t end_pos = -1;
int64_t pos = -1;
int64_t start = 0, end = 0;
struct tm timeinfo;
uint8_t *end_buffer;
int64_t end_buffer_size;
int64_t end_buffer_pos;
uint8_t *buffer;
int64_t buffer_size;
int64_t buffer_pos;
int64_t offset;
unsigned date;
int64_t size = avio_size(s->pb);
@ -259,40 +259,40 @@ static int64_t get_duration(AVFormatContext *s)
get_timeinfo(date, &timeinfo);
start = av_timegm(&timeinfo) * 1000LL;
end_buffer_size = FFMIN(MAX_DURATION_BUFFER_SIZE, size);
end_buffer = av_malloc(end_buffer_size);
if (!end_buffer)
buffer_size = FFMIN(MAX_DURATION_BUFFER_SIZE, size);
buffer = av_malloc(buffer_size);
if (!buffer)
goto fail;
end_buffer_pos = size - end_buffer_size;
avio_seek(s->pb, end_buffer_pos, SEEK_SET);
if (ffio_read_size(s->pb, end_buffer, end_buffer_size) < 0)
buffer_pos = size - buffer_size;
avio_seek(s->pb, buffer_pos, SEEK_SET);
if (ffio_read_size(s->pb, buffer, buffer_size) < 0)
goto fail;
offset = end_buffer_size - 8;
offset = buffer_size - 8;
while (offset > 0) {
if (AV_RL32(end_buffer + offset) == MKTAG('d','h','a','v')) {
int64_t seek_back = AV_RL32(end_buffer + offset + 4);
end_pos = end_buffer_pos + offset - seek_back + 8;
if (AV_RL32(buffer + offset) == MKTAG('d','h','a','v')) {
int64_t seek_back = AV_RL32(buffer + offset + 4);
pos = buffer_pos + offset - seek_back + 8;
break;
} else {
offset -= 9;
}
}
if (end_pos < end_buffer_pos || end_pos + 16 > end_buffer_pos + end_buffer_size)
if (pos < buffer_pos || pos + 16 > buffer_pos + buffer_size)
goto fail;
date = AV_RL32(end_buffer + (end_pos - end_buffer_pos) + 16);
date = AV_RL32(buffer + (pos - buffer_pos) + 16);
get_timeinfo(date, &timeinfo);
end = av_timegm(&timeinfo) * 1000LL;
av_freep(&end_buffer);
av_freep(&buffer);
avio_seek(s->pb, start_pos, SEEK_SET);
return end - start;
fail:
av_freep(&end_buffer);
av_freep(&buffer);
avio_seek(s->pb, start_pos, SEEK_SET);
return 0;
}