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Code Issues Releases Activity

utvideodec: Convert to the new bitstream reader

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Alexandra Hájková 2016-04-14 11:07:15 +02:00 committed by Diego Biurrun
parent 85f760fedd
commit 104a4289f9
1 changed files with 8 additions and 7 deletions
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15
libavcodec/utvideodec.c
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@ -28,10 +28,11 @@
#include <stdlib.h>
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "bitstream.h"
#include "bswapdsp.h"
#include "bytestream.h"
#include "get_bits.h"
#include "thread.h"
#include "utvideo.h"
@ -85,7 +86,7 @@ static int decode_plane(UtvideoContext *c, int plane_no,
int i, j, slice, pix;
int sstart, send;
VLC vlc;
GetBitContext gb;
BitstreamContext bc;
int prev, fsym;
const int cmask = ~(!plane_no && c->avctx->pix_fmt == AV_PIX_FMT_YUV420P);
@ -146,17 +147,17 @@ static int decode_plane(UtvideoContext *c, int plane_no,
c->bdsp.bswap_buf((uint32_t *) c->slice_bits,
(uint32_t *) c->slice_bits,
(slice_data_end - slice_data_start + 3) >> 2);
init_get_bits(&gb, c->slice_bits, slice_size * 8);
bitstream_init(&bc, c->slice_bits, slice_size * 8);
prev = 0x80;
for (j = sstart; j < send; j++) {
for (i = 0; i < width * step; i += step) {
if (get_bits_left(&gb) <= 0) {
if (bitstream_bits_left(&bc) <= 0) {
av_log(c->avctx, AV_LOG_ERROR,
"Slice decoding ran out of bits\n");
goto fail;
}
pix = get_vlc2(&gb, vlc.table, vlc.bits, 4);
pix = bitstream_read_vlc(&bc, vlc.table, vlc.bits, 4);
if (pix < 0) {
av_log(c->avctx, AV_LOG_ERROR, "Decoding error\n");
goto fail;
@ -169,9 +170,9 @@ static int decode_plane(UtvideoContext *c, int plane_no,
}
dest += stride;
}
if (get_bits_left(&gb) > 32)
if (bitstream_bits_left(&bc) > 32)
av_log(c->avctx, AV_LOG_WARNING,
"%d bits left after decoding slice\n", get_bits_left(&gb));
"%d bits left after decoding slice\n", bitstream_bits_left(&bc));
}
ff_free_vlc(&vlc);