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eamad: Convert to the new bitstream reader

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Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Alexandra Hájková 2016-02-17 18:16:06 +01:00 committed by Anton Khirnov
parent d182d8a6d3
commit adb1ebb36c
1 changed files with 19 additions and 23 deletions
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42
libavcodec/eamad.c
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@ -29,16 +29,17 @@
*/
#include "avcodec.h"
#include "bitstream.h"
#include "blockdsp.h"
#include "bytestream.h"
#include "bswapdsp.h"
#include "get_bits.h"
#include "aandcttab.h"
#include "eaidct.h"
#include "idctdsp.h"
#include "internal.h"
#include "mpeg12data.h"
#include "mpeg12vlc.h"
#include "vlc.h"
#define EA_PREAMBLE_SIZE 8
#define MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD I-frame */
@ -51,7 +52,7 @@ typedef struct MadContext {
BswapDSPContext bbdsp;
IDCTDSPContext idsp;
AVFrame *last_frame;
GetBitContext gb;
BitstreamContext bc;
void *bitstream_buf;
unsigned int bitstream_buf_size;
DECLARE_ALIGNED(16, int16_t, block)[64];
@ -129,17 +130,15 @@ static inline void decode_block_intra(MadContext *s, int16_t * block)
const uint8_t *scantable = s->scantable.permutated;
int16_t *quant_matrix = s->quant_matrix;
block[0] = (128 + get_sbits(&s->gb, 8)) * quant_matrix[0];
block[0] = (128 + bitstream_read_signed(&s->bc, 8)) * quant_matrix[0];
/* The RL decoder is derived from mpeg1_decode_block_intra;
Escaped level and run values a decoded differently */
i = 0;
{
OPEN_READER(re, &s->gb);
/* now quantify & encode AC coefficients */
for (;;) {
UPDATE_CACHE(re, &s->gb);
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
BITSTREAM_RL_VLC(level, run, &s->bc, rl->rl_vlc[0], TEX_VLC_BITS, 2);
if (level == 127) {
break;
@ -153,15 +152,12 @@ static inline void decode_block_intra(MadContext *s, int16_t * block)
j = scantable[i];
level = (level*quant_matrix[j]) >> 4;
level = (level-1)|1;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
LAST_SKIP_BITS(re, &s->gb, 1);
level = bitstream_apply_sign(&s->bc, level);
} else {
/* escape */
UPDATE_CACHE(re, &s->gb);
level = SHOW_SBITS(re, &s->gb, 10); SKIP_BITS(re, &s->gb, 10);
level = bitstream_read_signed(&s->bc, 10);
UPDATE_CACHE(re, &s->gb);
run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
run = bitstream_read(&s->bc, 6) + 1;
i += run;
if (i > 63) {
@ -183,17 +179,17 @@ static inline void decode_block_intra(MadContext *s, int16_t * block)
block[j] = level;
}
CLOSE_READER(re, &s->gb);
}
}
static int decode_motion(GetBitContext *gb)
static int decode_motion(BitstreamContext *bc)
{
int value = 0;
if (get_bits1(gb)) {
if (get_bits1(gb))
if (bitstream_read_bit(bc)) {
if (bitstream_read_bit(bc))
value = -17;
value += get_bits(gb, 4) + 1;
value += bitstream_read(bc, 4) + 1;
}
return value;
}
@ -205,11 +201,11 @@ static void decode_mb(MadContext *s, AVFrame *frame, int inter)
int j;
if (inter) {
int v = decode210(&s->gb);
int v = bitstream_decode210(&s->bc);
if (v < 2) {
mv_map = v ? get_bits(&s->gb, 6) : 63;
mv_x = decode_motion(&s->gb);
mv_y = decode_motion(&s->gb);
mv_map = v ? bitstream_read(&s->bc, 6) : 63;
mv_x = decode_motion(&s->bc);
mv_y = decode_motion(&s->bc);
} else {
mv_map = 0;
}
@ -217,7 +213,7 @@ static void decode_mb(MadContext *s, AVFrame *frame, int inter)
for (j=0; j<6; j++) {
if (mv_map & (1<<j)) { // mv_x and mv_y are guarded by mv_map
int add = 2*decode_motion(&s->gb);
int add = 2 * decode_motion(&s->bc);
comp_block(s, frame, s->mb_x, s->mb_y, j, mv_x, mv_y, add);
} else {
s->bdsp.clear_block(s->block);
@ -299,7 +295,7 @@ static int decode_frame(AVCodecContext *avctx,
return AVERROR(ENOMEM);
s->bbdsp.bswap16_buf(s->bitstream_buf, (const uint16_t *)(buf + bytestream2_tell(&gb)),
bytestream2_get_bytes_left(&gb) / 2);
init_get_bits(&s->gb, s->bitstream_buf, 8*(bytestream2_get_bytes_left(&gb)));
bitstream_init8(&s->bc, s->bitstream_buf, bytestream2_get_bytes_left(&gb));
for (s->mb_y=0; s->mb_y < (avctx->height+15)/16; s->mb_y++)
for (s->mb_x=0; s->mb_x < (avctx->width +15)/16; s->mb_x++)