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improvements by Reimar Döffinger; 24-bit decoding is not perfect, only

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the left half of the frame is painted, but the area that is painted
looks correct

Originally committed as revision 4686 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Mike Melanson 2005-11-10 13:54:32 +00:00
parent 3165e258b1
commit 4b7e4bedd6
1 changed files with 7 additions and 18 deletions
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25
libavcodec/truemotion1.c
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@ -232,7 +232,7 @@ static int make_ydt24_entry(int p1, int p2, int16_t *ydt)
lo = ydt[p1];
hi = ydt[p2];
return ((lo + (hi << 8)) << 1);
return ((lo + (hi << 8) + (hi << 16)) << 1);
}
#ifdef WORDS_BIGENDIAN
@ -410,7 +410,7 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
// FIXME: where to place this ?!?!
if (compression_types[header.compression].algorithm == ALGO_RGB24H)
s->avctx->pix_fmt = PIX_FMT_BGR24;
s->avctx->pix_fmt = PIX_FMT_RGBA32;
else
s->avctx->pix_fmt = PIX_FMT_RGB555; // RGB565 is supported aswell
@ -474,7 +474,7 @@ static int truemotion1_decode_init(AVCodecContext *avctx)
/* there is a vertical predictor for each pixel in a line; each vertical
* predictor is 0 to start with */
s->vert_pred =
(unsigned int *)av_malloc(s->avctx->width * sizeof(unsigned short));
(unsigned int *)av_malloc(s->avctx->width * sizeof(unsigned int));
return 0;
}
@ -533,13 +533,13 @@ hres,vres,i,i%vres (0 < i < 4)
#define APPLY_C_PREDICTOR_24() \
predictor_pair = s->c_predictor_table[index]; \
c_horiz_pred += (predictor_pair >> 1); \
horiz_pred += (predictor_pair >> 1); \
if (predictor_pair & 1) { \
GET_NEXT_INDEX() \
if (!index) { \
GET_NEXT_INDEX() \
predictor_pair = s->fat_c_predictor_table[index]; \
c_horiz_pred += (predictor_pair >> 1); \
horiz_pred += (predictor_pair >> 1); \
if (predictor_pair & 1) \
GET_NEXT_INDEX() \
else \
@ -547,7 +547,6 @@ hres,vres,i,i%vres (0 < i < 4)
} \
} else \
index++;
// c_last+coff = clast+c_horiz_pred;
#define APPLY_Y_PREDICTOR() \
@ -613,7 +612,7 @@ static void truemotion1_decode_16bit(TrueMotion1Context *s)
int index;
/* clean out the line buffer */
memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned short));
memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
GET_NEXT_INDEX();
@ -727,7 +726,6 @@ static void truemotion1_decode_24bit(TrueMotion1Context *s)
int pixels_left; /* remaining pixels on this line */
unsigned int predictor_pair;
unsigned int horiz_pred;
unsigned int c_horiz_pred;
unsigned int *vert_pred;
unsigned int *current_pixel_pair;
unsigned int *prev_pixel_pair;
@ -753,7 +751,7 @@ static void truemotion1_decode_24bit(TrueMotion1Context *s)
for (y = 0; y < s->avctx->height; y++) {
/* re-init variables for the next line iteration */
horiz_pred = c_horiz_pred = 0;
horiz_pred = 0;
current_pixel_pair = (unsigned int *)current_line;
prev_pixel_pair = (unsigned int *)prev_line;
vert_pred = s->vert_pred;
@ -774,19 +772,15 @@ static void truemotion1_decode_24bit(TrueMotion1Context *s)
APPLY_C_PREDICTOR_24();
APPLY_Y_PREDICTOR_24();
OUTPUT_PIXEL_PAIR();
// OUTPUT_PIXEL_PAIR_24_C();
APPLY_C_PREDICTOR_24();
APPLY_Y_PREDICTOR_24();
OUTPUT_PIXEL_PAIR();
// OUTPUT_PIXEL_PAIR_24_C();
} else {
APPLY_C_PREDICTOR_24();
APPLY_Y_PREDICTOR_24();
OUTPUT_PIXEL_PAIR();
// OUTPUT_PIXEL_PAIR_24_C();
APPLY_Y_PREDICTOR_24();
OUTPUT_PIXEL_PAIR();
// OUTPUT_PIXEL_PAIR_24_C();
}
break;
@ -806,19 +800,15 @@ static void truemotion1_decode_24bit(TrueMotion1Context *s)
APPLY_C_PREDICTOR_24();
APPLY_Y_PREDICTOR_24();
OUTPUT_PIXEL_PAIR();
// OUTPUT_PIXEL_PAIR_24_C();
APPLY_C_PREDICTOR_24();
APPLY_Y_PREDICTOR_24();
OUTPUT_PIXEL_PAIR();
// OUTPUT_PIXEL_PAIR_24_C();
} else if (s->block_type == BLOCK_4x2) {
APPLY_C_PREDICTOR_24();
APPLY_Y_PREDICTOR_24();
OUTPUT_PIXEL_PAIR();
// OUTPUT_PIXEL_PAIR_24_C();
APPLY_Y_PREDICTOR_24();
OUTPUT_PIXEL_PAIR();
// OUTPUT_PIXEL_PAIR_24_C();
} else {
APPLY_Y_PREDICTOR_24();
OUTPUT_PIXEL_PAIR();
@ -836,7 +826,6 @@ static void truemotion1_decode_24bit(TrueMotion1Context *s)
*vert_pred++ = *current_pixel_pair++;
*current_pixel_pair = *prev_pixel_pair++;
horiz_pred = *current_pixel_pair - *vert_pred;
// c_horiz_pred = *current_pixel_pair - *vert_pred;
*vert_pred++ = *current_pixel_pair++;
}