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cdxl: fix video decoding for some files 

Width is padded for ham encodings too.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>
This commit is contained in:
Paul B Mahol 2012-02-17 17:42:36 +00:00 committed by Justin Ruggles
parent 6d10c5bfc0
commit b5c626fdf3
1 changed files with 13 additions and 14 deletions
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27
libavcodec/cdxl.c
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@ -60,27 +60,29 @@ static void import_palette(CDXLVideoContext *c, uint32_t *new_palette)
}
}
static void bitplanar2chunky(CDXLVideoContext *c, int width,
int linesize, uint8_t *out)
static void bitplanar2chunky(CDXLVideoContext *c, int linesize, uint8_t *out)
{
int skip = FFALIGN(c->avctx->width, 16) - c->avctx->width;
GetBitContext gb;
int x, y, plane;
init_get_bits(&gb, c->video, c->video_size * 8);
memset(out, 0, linesize * c->avctx->height);
for (plane = 0; plane < c->bpp; plane++)
for (y = 0; y < c->avctx->height; y++)
for (x = 0; x < width; x++)
for (plane = 0; plane < c->bpp; plane++) {
for (y = 0; y < c->avctx->height; y++) {
for (x = 0; x < c->avctx->width; x++)
out[linesize * y + x] |= get_bits1(&gb) << plane;
skip_bits(&gb, skip);
}
}
}
static void cdxl_decode_rgb(CDXLVideoContext *c)
{
uint32_t *new_palette = (uint32_t *)c->frame.data[1];
int padded_width = FFALIGN(c->avctx->width, 16);
import_palette(c, new_palette);
bitplanar2chunky(c, padded_width, c->frame.linesize[0], c->frame.data[0]);
bitplanar2chunky(c, c->frame.linesize[0], c->frame.data[0]);
}
static void cdxl_decode_ham6(CDXLVideoContext *c)
@ -94,7 +96,7 @@ static void cdxl_decode_ham6(CDXLVideoContext *c)
out = c->frame.data[0];
import_palette(c, new_palette);
bitplanar2chunky(c, avctx->width, avctx->width, c->new_video);
bitplanar2chunky(c, avctx->width, c->new_video);
for (y = 0; y < avctx->height; y++) {
r = new_palette[0] & 0xFF0000;
@ -137,7 +139,7 @@ static void cdxl_decode_ham8(CDXLVideoContext *c)
out = c->frame.data[0];
import_palette(c, new_palette);
bitplanar2chunky(c, avctx->width, avctx->width, c->new_video);
bitplanar2chunky(c, avctx->width, c->new_video);
for (y = 0; y < avctx->height; y++) {
r = new_palette[0] & 0xFF0000;
@ -209,16 +211,13 @@ static int cdxl_decode_frame(AVCodecContext *avctx, void *data,
if (w != avctx->width || h != avctx->height)
avcodec_set_dimensions(avctx, w, h);
if (c->video_size < FFALIGN(avctx->width, 16) * avctx->height * c->bpp / 8)
return AVERROR_INVALIDDATA;
if (encoding == 0) {
if (c->video_size < FFALIGN(avctx->width, 16) *
avctx->height * c->bpp / 8)
return AVERROR_INVALIDDATA;
avctx->pix_fmt = PIX_FMT_PAL8;
} else if (encoding == 1 && (c->bpp == 6 || c->bpp == 8)) {
if (c->palette_size != (1 << (c->bpp - 1)))
return AVERROR_INVALIDDATA;
if (c->video_size < avctx->width * avctx->height * c->bpp / 8)
return AVERROR_INVALIDDATA;
avctx->pix_fmt = PIX_FMT_BGR24;
} else {
av_log_ask_for_sample(avctx, "unsupported encoding %d and bpp %d\n",