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Fix decoding of 24 bpp TM1 (except for aspect).

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Originally committed as revision 25662 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2010-11-03 17:01:30 +00:00
parent f1c5301413
commit a940dc6912
1 changed files with 10 additions and 6 deletions
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16
libavcodec/truemotion1.c
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@ -307,6 +307,7 @@ static void gen_vector_table24(TrueMotion1Context *s, const uint8_t *sel_vector_
static int truemotion1_decode_header(TrueMotion1Context *s)
{
int i;
int width_shift = 0;
int new_pix_fmt;
struct frame_header header;
uint8_t header_buffer[128]; /* logical maximum size of the header */
@ -373,8 +374,6 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
}
}
}
if (av_image_check_size(s->w, s->h, 0, s->avctx) < 0)
return -1;
if (header.compression >= 17) {
av_log(s->avctx, AV_LOG_ERROR, "invalid compression type (%d)\n", header.compression);
@ -396,11 +395,16 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
}
}
if (compression_types[header.compression].algorithm == ALGO_RGB24H)
if (compression_types[header.compression].algorithm == ALGO_RGB24H) {
new_pix_fmt = PIX_FMT_RGB32;
else
width_shift = 1;
} else
new_pix_fmt = PIX_FMT_RGB555; // RGB565 is supported as well
s->w >>= width_shift;
if (av_image_check_size(s->w, s->h, 0, s->avctx) < 0)
return -1;
if (s->w != s->avctx->width || s->h != s->avctx->height ||
new_pix_fmt != s->avctx->pix_fmt) {
if (s->frame.data[0])
@ -413,7 +417,7 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
/* There is 1 change bit per 4 pixels, so each change byte represents
* 32 pixels; divide width by 4 to obtain the number of change bits and
* then round up to the nearest byte. */
s->mb_change_bits_row_size = ((s->avctx->width >> 2) + 7) >> 3;
s->mb_change_bits_row_size = ((s->avctx->width >> (2 - width_shift)) + 7) >> 3;
if ((header.deltaset != s->last_deltaset) || (header.vectable != s->last_vectable))
{
@ -827,7 +831,7 @@ static void truemotion1_decode_24bit(TrueMotion1Context *s)
}
}
pixels_left -= 4;
pixels_left -= 2;
}
/* next change row */