From: Alexandra Hájková <[email protected]>
---
libavcodec/dnxhddec.c | 46 ++++++++++++++++++++--------------------------
1 file changed, 20 insertions(+), 26 deletions(-)
diff --git a/libavcodec/dnxhddec.c b/libavcodec/dnxhddec.c
index 50747ea..4597a92 100644
--- a/libavcodec/dnxhddec.c
+++ b/libavcodec/dnxhddec.c
@@ -24,17 +24,19 @@
#include "libavutil/imgutils.h"
#include "libavutil/timer.h"
+
#include "avcodec.h"
+#include "bitstream.h"
#include "blockdsp.h"
-#include "get_bits.h"
#include "dnxhddata.h"
#include "idctdsp.h"
#include "internal.h"
#include "thread.h"
+#include "vlc.h"
typedef struct DNXHDContext {
AVCodecContext *avctx;
- GetBitContext gb;
+ BitstreamContext bc;
BlockDSPContext bdsp;
int cid; ///< compression id
unsigned int width, height;
@@ -230,7 +232,7 @@ static av_always_inline void
dnxhd_decode_dct_block(DNXHDContext *ctx,
int i, j, index1, index2, len;
int level, component, sign;
const uint8_t *weight_matrix;
- OPEN_READER(bs, &ctx->gb);
+ BitstreamContext in_bc = ctx->bc;
if (!ctx->is_444) {
if (n & 2) {
@@ -249,37 +251,30 @@ static av_always_inline void
dnxhd_decode_dct_block(DNXHDContext *ctx,
}
}
- UPDATE_CACHE(bs, &ctx->gb);
- GET_VLC(len, bs, &ctx->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
+ len = bitstream_read_vlc(&in_bc, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
if (len) {
- level = GET_CACHE(bs, &ctx->gb);
- LAST_SKIP_BITS(bs, &ctx->gb, len);
- sign = ~level >> 31;
- level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
+ level = bitstream_read_xbits(&in_bc, len);
ctx->last_dc[component] += level;
}
block[0] = ctx->last_dc[component];
for (i = 1; ; i++) {
- UPDATE_CACHE(bs, &ctx->gb);
- GET_VLC(index1, bs, &ctx->gb, ctx->ac_vlc.table,
- DNXHD_VLC_BITS, 2);
+ index1 = bitstream_read_vlc(&in_bc, ctx->ac_vlc.table,
+ DNXHD_VLC_BITS, 2);
level = ctx->cid_table->ac_level[index1];
if (!level) /* EOB */
break;
- sign = SHOW_SBITS(bs, &ctx->gb, 1);
- SKIP_BITS(bs, &ctx->gb, 1);
+ sign = bitstream_read_signed(&in_bc, 1);
if (ctx->cid_table->ac_index_flag[index1]) {
- level += SHOW_UBITS(bs, &ctx->gb, index_bits) << 6;
- SKIP_BITS(bs, &ctx->gb, index_bits);
+ level = level + (bitstream_read(&in_bc, index_bits) << 6);
}
if (ctx->cid_table->ac_run_flag[index1]) {
- UPDATE_CACHE(bs, &ctx->gb);
- GET_VLC(index2, bs, &ctx->gb, ctx->run_vlc.table,
- DNXHD_VLC_BITS, 2);
+ index2 = bitstream_read_vlc(&in_bc, ctx->run_vlc.table,
+ DNXHD_VLC_BITS, 2);
+
i += ctx->cid_table->run[index2];
}
@@ -296,8 +291,7 @@ static av_always_inline void
dnxhd_decode_dct_block(DNXHDContext *ctx,
block[j] = (level ^ sign) - sign;
}
-
- CLOSE_READER(bs, &ctx->gb);
+ ctx->bc = in_bc;
}
static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block,
@@ -330,12 +324,12 @@ static int dnxhd_decode_macroblock(DNXHDContext *ctx,
AVFrame *frame,
int interlaced_mb = 0;
if (ctx->mbaff) {
- interlaced_mb = get_bits1(&ctx->gb);
- qscale = get_bits(&ctx->gb, 10);
+ interlaced_mb = bitstream_read_bit(&ctx->bc);
+ qscale = bitstream_read(&ctx->bc, 10);
} else {
- qscale = get_bits(&ctx->gb, 11);
+ qscale = bitstream_read(&ctx->bc, 11);
}
- skip_bits1(&ctx->gb);
+ bitstream_skip(&ctx->bc, 1);
for (i = 0; i < 8; i++) {
ctx->bdsp.clear_block(ctx->blocks[i]);
@@ -412,7 +406,7 @@ static int dnxhd_decode_macroblocks(DNXHDContext *ctx,
AVFrame *frame,
ctx->last_dc[0] =
ctx->last_dc[1] =
ctx->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels
+2^(bitdepth-1)
- init_get_bits(&ctx->gb, buf + ctx->mb_scan_index[y], (buf_size -
ctx->mb_scan_index[y]) << 3);
+ bitstream_init8(&ctx->bc, buf + ctx->mb_scan_index[y], buf_size -
ctx->mb_scan_index[y]);
for (x = 0; x < ctx->mb_width; x++) {
//START_TIMER;
dnxhd_decode_macroblock(ctx, frame, x, y);
--
2.7.3
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