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automatically detect Cinepak data from Sega FILM/CPK files 

Originally committed as revision 4525 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Mike Melanson 2005-08-14 18:39:59 +00:00
parent f0ff20a197
commit af9da83b0e
1 changed files with 10 additions and 1 deletions
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11
libavcodec/cinepak.c
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@ -316,13 +316,22 @@ static int cinepak_decode (CinepakContext *s)
uint8_t *eod = (s->data + s->size);
int i, result, strip_size, frame_flags, num_strips;
int y0 = 0;
int encoded_buf_size;
/* if true, Cinepak data is from a Sega FILM/CPK file */
int sega_film_data = 0;
if (s->size < 10)
return -1;
frame_flags = s->data[0];
num_strips = BE_16 (&s->data[8]);
s->data += 10;
encoded_buf_size = BE_16 (&s->data[2]);
if (encoded_buf_size != s->size)
sega_film_data = 1;
if (sega_film_data)
s->data += 12;
else
s->data += 10;
if (num_strips > MAX_STRIPS)
num_strips = MAX_STRIPS;