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Code Issues Releases Activity

smacker: convert palette and header reading to bytestream2.

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This commit is contained in:
Ronald S. Bultje 2012-03-24 17:37:43 -07:00
parent c3bbd0b53b
commit b2af057a36
1 changed files with 10 additions and 10 deletions
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20
libavcodec/smacker.c
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@ -357,17 +357,17 @@ static av_always_inline int smk_get_code(GetBitContext *gb, int *recode, int *la
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
SmackVContext * const smk = avctx->priv_data;
uint8_t *out;
uint32_t *pal;
GetByteContext gb2;
GetBitContext gb;
int blocks, blk, bw, bh;
int i;
int stride;
int flags;
if(buf_size <= 769)
if (avpkt->size <= 769)
return 0;
smk->pic.reference = 1;
@ -379,23 +379,23 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
/* make the palette available on the way out */
pal = (uint32_t*)smk->pic.data[1];
smk->pic.palette_has_changed = buf[0] & 1;
smk->pic.key_frame = !!(buf[0] & 2);
bytestream2_init(&gb2, avpkt->data, avpkt->size);
flags = bytestream2_get_byteu(&gb2);
smk->pic.palette_has_changed = flags & 1;
smk->pic.key_frame = !!(flags & 2);
if(smk->pic.key_frame)
smk->pic.pict_type = AV_PICTURE_TYPE_I;
else
smk->pic.pict_type = AV_PICTURE_TYPE_P;
buf++;
for(i = 0; i < 256; i++)
*pal++ = bytestream_get_be24(&buf);
buf_size -= 769;
*pal++ = bytestream2_get_be24u(&gb2);
last_reset(smk->mmap_tbl, smk->mmap_last);
last_reset(smk->mclr_tbl, smk->mclr_last);
last_reset(smk->full_tbl, smk->full_last);
last_reset(smk->type_tbl, smk->type_last);
init_get_bits(&gb, buf, buf_size * 8);
init_get_bits(&gb, avpkt->data + 769, (avpkt->size - 769) * 8);
blk = 0;
bw = avctx->width >> 2;
@ -506,7 +506,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
*(AVFrame*)data = smk->pic;
/* always report that the buffer was completely consumed */
return buf_size;
return avpkt->size;
}