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ffmpeg.wasm-core
Commit ffc00df0 authored by Alexandra Hájková's avatar Alexandra Hájková Committed by Diego Biurrun
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cavs: Convert to the new bitstream reader

parent 0c89ff82
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Inline Side-by-side
Showing with 95 additions and 95 deletions
libavcodec/cavs.c
View file @ ffc00df0
......@@ -26,8 +26,8 @@
*/
#include "avcodec.h"
#include "get_bits.h"
#include "golomb_legacy.h"
#include "bitstream.h"
#include "golomb.h"
#include "h264chroma.h"
#include "idctdsp.h"
#include "internal.h"
......@@ -603,8 +603,8 @@ void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
mv_pred_median(h, mvP, mvA, mvB, mvC);
if (mode < MV_PRED_PSKIP) {
mvP->x += get_se_golomb(&h->gb);
mvP->y += get_se_golomb(&h->gb);
mvP->x += get_se_golomb(&h->bc);
mvP->y += get_se_golomb(&h->bc);
}
set_mvs(mvP, size);
}
......
libavcodec/cavs.h
View file @ ffc00df0
......@@ -22,11 +22,11 @@
#ifndef AVCODEC_CAVS_H
#define AVCODEC_CAVS_H
#include "bitstream.h"
#include "cavsdsp.h"
#include "blockdsp.h"
#include "h264chroma.h"
#include "idctdsp.h"
#include "get_bits.h"
#include "videodsp.h"
#define SLICE_MAX_START_CODE 0x000001af
......@@ -167,7 +167,7 @@ typedef struct AVSContext {
IDCTDSPContext idsp;
VideoDSPContext vdsp;
CAVSDSPContext cdsp;
GetBitContext gb;
BitstreamContext bc;
AVSFrame cur; ///< currently decoded frame
AVSFrame DPB[2]; ///< reference frames
int dist[2]; ///< temporal distances from current frame to ref frames
......
libavcodec/cavsdec.c
View file @ ffc00df0
......@@ -26,9 +26,9 @@
*/
#include "avcodec.h"
#include "get_bits.h"
#include "golomb_legacy.h"
#include "bitstream.h"
#include "cavs.h"
#include "golomb.h"
#include "internal.h"
#include "mpeg12data.h"
......@@ -506,13 +506,13 @@ static inline void mv_pred_sym(AVSContext *h, cavs_vector *src,
****************************************************************************/
/** kth-order exponential golomb code */
static inline int get_ue_code(GetBitContext *gb, int order)
static inline int get_ue_code(BitstreamContext *bc, int order)
{
if (order) {
int ret = get_ue_golomb(gb) << order;
return ret + get_bits(gb, order);
int ret = get_ue_golomb(bc) << order;
return ret + bitstream_read(bc, order);
}
return get_ue_golomb(gb);
return get_ue_golomb(bc);
}
static inline int dequant(AVSContext *h, int16_t *level_buf, uint8_t *run_buf,
......@@ -545,7 +545,7 @@ static inline int dequant(AVSContext *h, int16_t *level_buf, uint8_t *run_buf,
* @param dst location of sample block
* @param stride line stride in frame buffer
*/
static int decode_residual_block(AVSContext *h, GetBitContext *gb,
static int decode_residual_block(AVSContext *h, BitstreamContext *bc,
const struct dec_2dvlc *r, int esc_golomb_order,
int qp, uint8_t *dst, ptrdiff_t stride)
{
......@@ -555,10 +555,10 @@ static int decode_residual_block(AVSContext *h, GetBitContext *gb,
int16_t *block = h->block;
for (i = 0;i < 65; i++) {
level_code = get_ue_code(gb, r->golomb_order);
level_code = get_ue_code(bc, r->golomb_order);
if (level_code >= ESCAPE_CODE) {
run = ((level_code - ESCAPE_CODE) >> 1) + 1;
esc_code = get_ue_code(gb, esc_golomb_order);
esc_code = get_ue_code(bc, esc_golomb_order);
level = esc_code + (run > r->max_run ? 1 : r->level_add[run]);
while (level > r->inc_limit)
r++;
......@@ -588,10 +588,10 @@ static int decode_residual_block(AVSContext *h, GetBitContext *gb,
static inline void decode_residual_chroma(AVSContext *h)
{
if (h->cbp & (1 << 4))
decode_residual_block(h, &h->gb, chroma_dec, 0,
decode_residual_block(h, &h->bc, chroma_dec, 0,
cavs_chroma_qp[h->qp], h->cu, h->c_stride);
if (h->cbp & (1 << 5))
decode_residual_block(h, &h->gb, chroma_dec, 0,
decode_residual_block(h, &h->bc, chroma_dec, 0,
cavs_chroma_qp[h->qp], h->cv, h->c_stride);
}
......@@ -600,7 +600,7 @@ static inline int decode_residual_inter(AVSContext *h)
int block;
/* get coded block pattern */
int cbp = get_ue_golomb(&h->gb);
int cbp = get_ue_golomb(&h->bc);
if (cbp > 63 || cbp < 0) {
av_log(h->avctx, AV_LOG_ERROR, "illegal inter cbp %d\n", cbp);
return AVERROR_INVALIDDATA;
......@@ -609,10 +609,10 @@ static inline int decode_residual_inter(AVSContext *h)
/* get quantizer */
if (h->cbp && !h->qp_fixed)
h->qp = (h->qp + get_se_golomb(&h->gb)) & 63;
h->qp = (h->qp + get_se_golomb(&h->bc)) & 63;
for (block = 0; block < 4; block++)
if (h->cbp & (1 << block))
decode_residual_block(h, &h->gb, inter_dec, 0, h->qp,
decode_residual_block(h, &h->bc, inter_dec, 0, h->qp,
h->cy + h->luma_scan[block], h->l_stride);
decode_residual_chroma(h);
......@@ -637,7 +637,7 @@ static inline void set_mv_intra(AVSContext *h)
static int decode_mb_i(AVSContext *h, int cbp_code)
{
GetBitContext *gb = &h->gb;
BitstreamContext *bc = &h->bc;
unsigned pred_mode_uv;
int block;
uint8_t top[18];
......@@ -656,13 +656,13 @@ static int decode_mb_i(AVSContext *h, int cbp_code)
predpred = FFMIN(nA, nB);
if (predpred == NOT_AVAIL) // if either is not available
predpred = INTRA_L_LP;
if (!get_bits1(gb)) {
int rem_mode = get_bits(gb, 2);
if (!bitstream_read_bit(bc)) {
int rem_mode = bitstream_read(bc, 2);
predpred = rem_mode + (rem_mode >= predpred);
}
h->pred_mode_Y[pos] = predpred;
}
pred_mode_uv = get_ue_golomb(gb);
pred_mode_uv = get_ue_golomb(bc);
if (pred_mode_uv > 6) {
av_log(h->avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
return AVERROR_INVALIDDATA;
......@@ -671,14 +671,14 @@ static int decode_mb_i(AVSContext *h, int cbp_code)
/* get coded block pattern */
if (h->cur.f->pict_type == AV_PICTURE_TYPE_I)
cbp_code = get_ue_golomb(gb);
cbp_code = get_ue_golomb(bc);
if (cbp_code > 63 || cbp_code < 0) {
av_log(h->avctx, AV_LOG_ERROR, "illegal intra cbp\n");
return AVERROR_INVALIDDATA;
}
h->cbp = cbp_tab[cbp_code][0];
if (h->cbp && !h->qp_fixed)
h->qp = (h->qp + get_se_golomb(gb)) & 63; //qp_delta
h->qp = (h->qp + get_se_golomb(bc)) & 63; // qp_delta
/* luma intra prediction interleaved with residual decode/transform/add */
for (block = 0; block < 4; block++) {
......@@ -687,7 +687,7 @@ static int decode_mb_i(AVSContext *h, int cbp_code)
h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]]
(d, top, left, h->l_stride);
if (h->cbp & (1<<block))
decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride);
decode_residual_block(h, bc, intra_dec, 1, h->qp, d, h->l_stride);
}
/* chroma intra prediction */
......@@ -716,7 +716,7 @@ static inline void set_intra_mode_default(AVSContext *h)
static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type)
{
GetBitContext *gb = &h->gb;
BitstreamContext *bc = &h->bc;
int ref[4];
ff_cavs_init_mb(h);
......@@ -725,26 +725,26 @@ static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type)
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0);
break;
case P_16X16:
ref[0] = h->ref_flag ? 0 : get_bits1(gb);
ref[0] = h->ref_flag ? 0 : bitstream_read_bit(bc);
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, ref[0]);
break;
case P_16X8:
ref[0] = h->ref_flag ? 0 : get_bits1(gb);
ref[2] = h->ref_flag ? 0 : get_bits1(gb);
ref[0] = h->ref_flag ? 0 : bitstream_read_bit(bc);
ref[2] = h->ref_flag ? 0 : bitstream_read_bit(bc);
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, ref[0]);
ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, ref[2]);
break;
case P_8X16:
ref[0] = h->ref_flag ? 0 : get_bits1(gb);
ref[1] = h->ref_flag ? 0 : get_bits1(gb);
ref[0] = h->ref_flag ? 0 : bitstream_read_bit(bc);
ref[1] = h->ref_flag ? 0 : bitstream_read_bit(bc);
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, ref[0]);
ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, ref[1]);
break;
case P_8X8:
ref[0] = h->ref_flag ? 0 : get_bits1(gb);
ref[1] = h->ref_flag ? 0 : get_bits1(gb);
ref[2] = h->ref_flag ? 0 : get_bits1(gb);
ref[3] = h->ref_flag ? 0 : get_bits1(gb);
ref[0] = h->ref_flag ? 0 : bitstream_read_bit(bc);
ref[1] = h->ref_flag ? 0 : bitstream_read_bit(bc);
ref[2] = h->ref_flag ? 0 : bitstream_read_bit(bc);
ref[3] = h->ref_flag ? 0 : bitstream_read_bit(bc);
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN, BLK_8X8, ref[0]);
ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN, BLK_8X8, ref[1]);
ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN, BLK_8X8, ref[2]);
......@@ -797,7 +797,7 @@ static void decode_mb_b(AVSContext *h, enum cavs_mb mb_type)
break;
case B_8X8:
for (block = 0; block < 4; block++)
sub_type[block] = get_bits(&h->gb, 2);
sub_type[block] = bitstream_read(&h->bc, 2);
for (block = 0; block < 4; block++) {
switch (sub_type[block]) {
case B_SUB_DIRECT:
......@@ -874,7 +874,7 @@ static void decode_mb_b(AVSContext *h, enum cavs_mb mb_type)
*
****************************************************************************/
static inline int decode_slice_header(AVSContext *h, GetBitContext *gb)
static inline int decode_slice_header(AVSContext *h, BitstreamContext *bc)
{
if (h->stc > 0xAF)
av_log(h->avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
......@@ -884,13 +884,13 @@ static inline int decode_slice_header(AVSContext *h, GetBitContext *gb)
/* mark top macroblocks as unavailable */
h->flags &= ~(B_AVAIL | C_AVAIL);
if ((h->mby == 0) && (!h->qp_fixed)) {
h->qp_fixed = get_bits1(gb);
h->qp = get_bits(gb, 6);
h->qp_fixed = bitstream_read_bit(bc);
h->qp = bitstream_read(bc, 6);
}
/* inter frame or second slice can have weighting params */
if ((h->cur.f->pict_type != AV_PICTURE_TYPE_I) ||
(!h->pic_structure && h->mby >= h->mb_width / 2))
if (get_bits1(gb)) { //slice_weighting_flag
if (bitstream_read_bit(bc)) { // slice_weighting_flag
av_log(h->avctx, AV_LOG_ERROR,
"weighted prediction not yet supported\n");
}
......@@ -899,21 +899,21 @@ static inline int decode_slice_header(AVSContext *h, GetBitContext *gb)
static inline int check_for_slice(AVSContext *h)
{
GetBitContext *gb = &h->gb;
BitstreamContext *bc = &h->bc;
int align;
if (h->mbx)
return 0;
align = (-get_bits_count(gb)) & 7;
align = (-bitstream_tell(bc)) & 7;
/* check for stuffing byte */
if (!align && (show_bits(gb, 8) == 0x80))
if (!align && (bitstream_peek(bc, 8) == 0x80))
align = 8;
if ((show_bits_long(gb, 24 + align) & 0xFFFFFF) == 0x000001) {
skip_bits_long(gb, 24 + align);
h->stc = get_bits(gb, 8);
if ((bitstream_peek(bc, 24 + align) & 0xFFFFFF) == 0x000001) {
bitstream_skip(bc, 24 + align);
h->stc = bitstream_read(bc, 8);
if (h->stc >= h->mb_height)
return 0;
decode_slice_header(h, gb);
decode_slice_header(h, bc);
return 1;
}
return 0;
......@@ -938,9 +938,9 @@ static int decode_pic(AVSContext *h)
av_frame_unref(h->cur.f);
skip_bits(&h->gb, 16);//bbv_dwlay
bitstream_skip(&h->bc, 16); // bbv_dwlay
if (h->stc == PIC_PB_START_CODE) {
h->cur.f->pict_type = get_bits(&h->gb, 2) + AV_PICTURE_TYPE_I;
h->cur.f->pict_type = bitstream_read(&h->bc, 2) + AV_PICTURE_TYPE_I;
if (h->cur.f->pict_type > AV_PICTURE_TYPE_B) {
av_log(h->avctx, AV_LOG_ERROR, "illegal picture type\n");
return AVERROR_INVALIDDATA;
......@@ -951,17 +951,17 @@ static int decode_pic(AVSContext *h)
return AVERROR_INVALIDDATA;
} else {
h->cur.f->pict_type = AV_PICTURE_TYPE_I;
if (get_bits1(&h->gb))
skip_bits(&h->gb, 24);//time_code
if (bitstream_read_bit(&h->bc))
bitstream_skip(&h->bc, 24); // time_code
/* old sample clips were all progressive and no low_delay,
bump stream revision if detected otherwise */
if (h->low_delay || !(show_bits(&h->gb, 9) & 1))
if (h->low_delay || !(bitstream_peek(&h->bc, 9) & 1))
h->stream_revision = 1;
/* similarly test top_field_first and repeat_first_field */
else if (show_bits(&h->gb, 11) & 3)
else if (bitstream_peek(&h->bc, 11) & 3)
h->stream_revision = 1;
if (h->stream_revision > 0)
skip_bits(&h->gb, 1); //marker_bit
bitstream_skip(&h->bc, 1); // marker_bit
}
ret = ff_get_buffer(h->avctx, h->cur.f, h->cur.f->pict_type == AV_PICTURE_TYPE_B ?
......@@ -977,7 +977,7 @@ static int decode_pic(AVSContext *h)
}
ff_cavs_init_pic(h);
h->cur.poc = get_bits(&h->gb, 8) * 2;
h->cur.poc = bitstream_read(&h->bc, 8) * 2;
/* get temporal distances and MV scaling factors */
if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
......@@ -996,31 +996,31 @@ static int decode_pic(AVSContext *h)
}
if (h->low_delay)
get_ue_golomb(&h->gb); //bbv_check_times
h->progressive = get_bits1(&h->gb);
get_ue_golomb(&h->bc); // bbv_check_times
h->progressive = bitstream_read_bit(&h->bc);
h->pic_structure = 1;
if (!h->progressive)
h->pic_structure = get_bits1(&h->gb);
h->pic_structure = bitstream_read_bit(&h->bc);
if (!h->pic_structure && h->stc == PIC_PB_START_CODE)
skip_bits1(&h->gb); //advanced_pred_mode_disable
skip_bits1(&h->gb); //top_field_first
skip_bits1(&h->gb); //repeat_first_field
h->qp_fixed = get_bits1(&h->gb);
h->qp = get_bits(&h->gb, 6);
bitstream_skip(&h->bc, 1); // advanced_pred_mode_disable
bitstream_skip(&h->bc, 1); // top_field_first
bitstream_skip(&h->bc, 1); // repeat_first_field
h->qp_fixed = bitstream_read_bit(&h->bc);
h->qp = bitstream_read(&h->bc, 6);
if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
if (!h->progressive && !h->pic_structure)
skip_bits1(&h->gb);//what is this?
skip_bits(&h->gb, 4); //reserved bits
bitstream_skip(&h->bc, 1); // what is this?
bitstream_skip(&h->bc, 4); // reserved bits
} else {
if (!(h->cur.f->pict_type == AV_PICTURE_TYPE_B && h->pic_structure == 1))
h->ref_flag = get_bits1(&h->gb);
skip_bits(&h->gb, 4); //reserved bits
h->skip_mode_flag = get_bits1(&h->gb);
h->ref_flag = bitstream_read_bit(&h->bc);
bitstream_skip(&h->bc, 4); // reserved bits
h->skip_mode_flag = bitstream_read_bit(&h->bc);
}
h->loop_filter_disable = get_bits1(&h->gb);
if (!h->loop_filter_disable && get_bits1(&h->gb)) {
h->alpha_offset = get_se_golomb(&h->gb);
h->beta_offset = get_se_golomb(&h->gb);
h->loop_filter_disable = bitstream_read_bit(&h->bc);
if (!h->loop_filter_disable && bitstream_read_bit(&h->bc)) {
h->alpha_offset = get_se_golomb(&h->bc);
h->beta_offset = get_se_golomb(&h->bc);
} else {
h->alpha_offset = h->beta_offset = 0;
}
......@@ -1034,11 +1034,11 @@ static int decode_pic(AVSContext *h)
if (check_for_slice(h))
skip_count = -1;
if (h->skip_mode_flag && (skip_count < 0))
skip_count = get_ue_golomb(&h->gb);
skip_count = get_ue_golomb(&h->bc);
if (h->skip_mode_flag && skip_count--) {
decode_mb_p(h, P_SKIP);
} else {
mb_type = get_ue_golomb(&h->gb) + P_SKIP + h->skip_mode_flag;
mb_type = get_ue_golomb(&h->bc) + P_SKIP + h->skip_mode_flag;
if (mb_type > P_8X8)
decode_mb_i(h, mb_type - P_8X8 - 1);
else
......@@ -1050,11 +1050,11 @@ static int decode_pic(AVSContext *h)
if (check_for_slice(h))
skip_count = -1;
if (h->skip_mode_flag && (skip_count < 0))
skip_count = get_ue_golomb(&h->gb);
skip_count = get_ue_golomb(&h->bc);
if (h->skip_mode_flag && skip_count--) {
decode_mb_b(h, B_SKIP);
} else {
mb_type = get_ue_golomb(&h->gb) + B_SKIP + h->skip_mode_flag;
mb_type = get_ue_golomb(&h->bc) + B_SKIP + h->skip_mode_flag;
if (mb_type > B_8X8)
decode_mb_i(h, mb_type - B_8X8 - 1);
else
......@@ -1081,12 +1081,12 @@ static int decode_seq_header(AVSContext *h)
int frame_rate_code;
int width, height;
h->profile = get_bits(&h->gb, 8);
h->level = get_bits(&h->gb, 8);
skip_bits1(&h->gb); //progressive sequence
h->profile = bitstream_read(&h->bc, 8);
h->level = bitstream_read(&h->bc, 8);
bitstream_skip(&h->bc, 1); // progressive sequence
width = get_bits(&h->gb, 14);
height = get_bits(&h->gb, 14);
width = bitstream_read(&h->bc, 14);
height = bitstream_read(&h->bc, 14);
if ((h->width || h->height) && (h->width != width || h->height != height)) {
avpriv_report_missing_feature(h->avctx,
"Width/height changing in CAVS");
......@@ -1095,14 +1095,14 @@ static int decode_seq_header(AVSContext *h)
h->width = width;
h->height = height;
skip_bits(&h->gb, 2); //chroma format
skip_bits(&h->gb, 3); //sample_precision
h->aspect_ratio = get_bits(&h->gb, 4);
frame_rate_code = get_bits(&h->gb, 4);
skip_bits(&h->gb, 18); //bit_rate_lower
skip_bits1(&h->gb); //marker_bit
skip_bits(&h->gb, 12); //bit_rate_upper
h->low_delay = get_bits1(&h->gb);
bitstream_skip(&h->bc, 2); // chroma format
bitstream_skip(&h->bc, 3); // sample_precision
h->aspect_ratio = bitstream_read(&h->bc, 4);
frame_rate_code = bitstream_read(&h->bc, 4);
bitstream_skip(&h->bc, 18); // bit_rate_lower
bitstream_skip(&h->bc, 1); // marker_bit
bitstream_skip(&h->bc, 12); // bit_rate_upper
h->low_delay = bitstream_read_bit(&h->bc);
h->mb_width = (h->width + 15) >> 4;
h->mb_height = (h->height + 15) >> 4;
h->avctx->framerate = ff_mpeg12_frame_rate_tab[frame_rate_code];
......@@ -1147,7 +1147,7 @@ static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
input_size = (buf_end - buf_ptr) * 8;
switch (stc) {
case CAVS_START_CODE:
init_get_bits(&h->gb, buf_ptr, input_size);
bitstream_init(&h->bc, buf_ptr, input_size);
decode_seq_header(h);
break;
case PIC_I_START_CODE:
......@@ -1160,7 +1160,7 @@ static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
*got_frame = 0;
if (!h->got_keyframe)
break;
init_get_bits(&h->gb, buf_ptr, input_size);
bitstream_init(&h->bc, buf_ptr, input_size);
h->stc = stc;
if (decode_pic(h))
break;
......@@ -1184,8 +1184,8 @@ static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
break;
default:
if (stc <= SLICE_MAX_START_CODE) {
init_get_bits(&h->gb, buf_ptr, input_size);
decode_slice_header(h, &h->gb);
bitstream_init(&h->bc, buf_ptr, input_size);
decode_slice_header(h, &h->bc);
}
break;
}
......
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