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ffmpeg.wasm-core
Commit 9f78e3a4 authored by Alexandra Hájková's avatar Alexandra Hájková Committed by Diego Biurrun
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svq1dec: Convert to the new bitstream reader

parent 6efbc88a
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Showing with 60 additions and 60 deletions
libavcodec/svq1dec.c
View file @ 9f78e3a4
......@@ -33,7 +33,7 @@
*/
#include "avcodec.h"
#include "get_bits.h"
#include "bitstream.h"
#include "h263.h"
#include "hpeldsp.h"
#include "internal.h"
......@@ -55,7 +55,7 @@ typedef struct svq1_pmv_s {
typedef struct SVQ1Context {
HpelDSPContext hdsp;
GetBitContext gb;
BitstreamContext bc;
AVFrame *prev;
uint8_t *pkt_swapped;
......@@ -111,7 +111,7 @@ static const uint8_t string_table[256] = {
break; \
} \
/* divide block if next bit set */ \
if (get_bits1(bitbuf) == 0) \
if (bitstream_read_bit(bc) == 0) \
break; \
/* add child nodes */ \
list[n++] = list[i]; \
......@@ -145,7 +145,7 @@ static const uint8_t string_table[256] = {
#define SVQ1_CALC_CODEBOOK_ENTRIES(cbook) \
codebook = (const uint32_t *)cbook[level]; \
if (stages > 0) \
bit_cache = get_bits(bitbuf, 4 * stages); \
bit_cache = bitstream_read(bc, 4 * stages); \
/* calculate codebook entries for this vector */ \
for (j = 0; j < stages; j++) { \
entries[j] = (((bit_cache >> (4 * (stages - j - 1))) & 0xF) + \
......@@ -154,7 +154,7 @@ static const uint8_t string_table[256] = {
mean -= stages * 128; \
n4 = mean + (mean >> 31) << 16 | (mean & 0xFFFF);
static int svq1_decode_block_intra(GetBitContext *bitbuf, uint8_t *pixels,
static int svq1_decode_block_intra(BitstreamContext *bc, uint8_t *pixels,
ptrdiff_t pitch)
{
uint32_t bit_cache;
......@@ -180,7 +180,7 @@ static int svq1_decode_block_intra(GetBitContext *bitbuf, uint8_t *pixels,
height = 1 << ((3 + level) / 2);
/* get number of stages (-1 skips vector, 0 for mean only) */
stages = get_vlc2(bitbuf, svq1_intra_multistage[level].table, 3, 3) - 1;
stages = bitstream_read_vlc(bc, svq1_intra_multistage[level].table, 3, 3) - 1;
if (stages == -1) {
for (y = 0; y < height; y++)
......@@ -195,7 +195,7 @@ static int svq1_decode_block_intra(GetBitContext *bitbuf, uint8_t *pixels,
return AVERROR_INVALIDDATA; /* invalid vector */
}
mean = get_vlc2(bitbuf, svq1_intra_mean.table, 8, 3);
mean = bitstream_read_vlc(bc, svq1_intra_mean.table, 8, 3);
if (stages == 0) {
for (y = 0; y < height; y++)
......@@ -219,7 +219,7 @@ static int svq1_decode_block_intra(GetBitContext *bitbuf, uint8_t *pixels,
return 0;
}
static int svq1_decode_block_non_intra(GetBitContext *bitbuf, uint8_t *pixels,
static int svq1_decode_block_non_intra(BitstreamContext *bc, uint8_t *pixels,
ptrdiff_t pitch)
{
uint32_t bit_cache;
......@@ -245,7 +245,7 @@ static int svq1_decode_block_non_intra(GetBitContext *bitbuf, uint8_t *pixels,
height = 1 << ((3 + level) / 2);
/* get number of stages (-1 skips vector, 0 for mean only) */
stages = get_vlc2(bitbuf, svq1_inter_multistage[level].table, 3, 2) - 1;
stages = bitstream_read_vlc(bc, svq1_inter_multistage[level].table, 3, 2) - 1;
if (stages == -1)
continue; /* skip vector */
......@@ -257,7 +257,7 @@ static int svq1_decode_block_non_intra(GetBitContext *bitbuf, uint8_t *pixels,
return AVERROR_INVALIDDATA; /* invalid vector */
}
mean = get_vlc2(bitbuf, svq1_inter_mean.table, 9, 3) - 256;
mean = bitstream_read_vlc(bc, svq1_inter_mean.table, 9, 3) - 256;
SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_inter_codebooks);
......@@ -277,7 +277,7 @@ static int svq1_decode_block_non_intra(GetBitContext *bitbuf, uint8_t *pixels,
return 0;
}
static int svq1_decode_motion_vector(GetBitContext *bitbuf, svq1_pmv *mv,
static int svq1_decode_motion_vector(BitstreamContext *bc, svq1_pmv *mv,
svq1_pmv **pmv)
{
int diff;
......@@ -285,11 +285,11 @@ static int svq1_decode_motion_vector(GetBitContext *bitbuf, svq1_pmv *mv,
for (i = 0; i < 2; i++) {
/* get motion code */
diff = get_vlc2(bitbuf, svq1_motion_component.table, 7, 2);
diff = bitstream_read_vlc(bc, svq1_motion_component.table, 7, 2);
if (diff < 0)
return AVERROR_INVALIDDATA;
else if (diff) {
if (get_bits1(bitbuf))
if (bitstream_read_bit(bc))
diff = -diff;
}
......@@ -320,7 +320,7 @@ static void svq1_skip_block(uint8_t *current, uint8_t *previous,
}
}
static int svq1_motion_inter_block(HpelDSPContext *hdsp, GetBitContext *bitbuf,
static int svq1_motion_inter_block(HpelDSPContext *hdsp, BitstreamContext *bc,
uint8_t *current, uint8_t *previous,
ptrdiff_t pitch, svq1_pmv *motion, int x, int y,
int width, int height)
......@@ -341,7 +341,7 @@ static int svq1_motion_inter_block(HpelDSPContext *hdsp, GetBitContext *bitbuf,
pmv[2] = &motion[x / 8 + 4];
}
result = svq1_decode_motion_vector(bitbuf, &mv, pmv);
result = svq1_decode_motion_vector(bc, &mv, pmv);
if (result != 0)
return result;
......@@ -364,7 +364,7 @@ static int svq1_motion_inter_block(HpelDSPContext *hdsp, GetBitContext *bitbuf,
return 0;
}
static int svq1_motion_inter_4v_block(HpelDSPContext *hdsp, GetBitContext *bitbuf,
static int svq1_motion_inter_4v_block(HpelDSPContext *hdsp, BitstreamContext *bc,
uint8_t *current, uint8_t *previous,
ptrdiff_t pitch, svq1_pmv *motion, int x, int y,
int width, int height)
......@@ -385,7 +385,7 @@ static int svq1_motion_inter_4v_block(HpelDSPContext *hdsp, GetBitContext *bitbu
pmv[2] = &motion[(x / 8) + 4];
}
result = svq1_decode_motion_vector(bitbuf, &mv, pmv);
result = svq1_decode_motion_vector(bc, &mv, pmv);
if (result != 0)
return result;
......@@ -398,7 +398,7 @@ static int svq1_motion_inter_4v_block(HpelDSPContext *hdsp, GetBitContext *bitbu
} else {
pmv[1] = &motion[(x / 8) + 3];
}
result = svq1_decode_motion_vector(bitbuf, &motion[0], pmv);
result = svq1_decode_motion_vector(bc, &motion[0], pmv);
if (result != 0)
return result;
......@@ -407,7 +407,7 @@ static int svq1_motion_inter_4v_block(HpelDSPContext *hdsp, GetBitContext *bitbu
pmv[1] = &motion[0];
pmv[2] = &motion[(x / 8) + 1];
result = svq1_decode_motion_vector(bitbuf, &motion[(x / 8) + 2], pmv);
result = svq1_decode_motion_vector(bc, &motion[(x / 8) + 2], pmv);
if (result != 0)
return result;
......@@ -416,7 +416,7 @@ static int svq1_motion_inter_4v_block(HpelDSPContext *hdsp, GetBitContext *bitbu
pmv[2] = &motion[(x / 8) + 2];
pmv[3] = &motion[(x / 8) + 3];
result = svq1_decode_motion_vector(bitbuf, pmv[3], pmv);
result = svq1_decode_motion_vector(bc, pmv[3], pmv);
if (result != 0)
return result;
......@@ -446,7 +446,7 @@ static int svq1_motion_inter_4v_block(HpelDSPContext *hdsp, GetBitContext *bitbu
}
static int svq1_decode_delta_block(AVCodecContext *avctx, HpelDSPContext *hdsp,
GetBitContext *bitbuf,
BitstreamContext *bc,
uint8_t *current, uint8_t *previous,
ptrdiff_t pitch, svq1_pmv *motion, int x, int y,
int width, int height)
......@@ -455,7 +455,7 @@ static int svq1_decode_delta_block(AVCodecContext *avctx, HpelDSPContext *hdsp,
int result = 0;
/* get block type */
block_type = get_vlc2(bitbuf, svq1_block_type.table, 2, 2);
block_type = bitstream_read_vlc(bc, svq1_block_type.table, 2, 2);
/* reset motion vectors */
if (block_type == SVQ1_BLOCK_SKIP || block_type == SVQ1_BLOCK_INTRA) {
......@@ -473,45 +473,45 @@ static int svq1_decode_delta_block(AVCodecContext *avctx, HpelDSPContext *hdsp,
break;
case SVQ1_BLOCK_INTER:
result = svq1_motion_inter_block(hdsp, bitbuf, current, previous,
result = svq1_motion_inter_block(hdsp, bc, current, previous,
pitch, motion, x, y, width, height);
if (result != 0) {
ff_dlog(avctx, "Error in svq1_motion_inter_block %i\n", result);
break;
}
result = svq1_decode_block_non_intra(bitbuf, current, pitch);
result = svq1_decode_block_non_intra(bc, current, pitch);
break;
case SVQ1_BLOCK_INTER_4V:
result = svq1_motion_inter_4v_block(hdsp, bitbuf, current, previous,
result = svq1_motion_inter_4v_block(hdsp, bc, current, previous,
pitch, motion, x, y, width, height);
if (result != 0) {
ff_dlog(avctx, "Error in svq1_motion_inter_4v_block %i\n", result);
break;
}
result = svq1_decode_block_non_intra(bitbuf, current, pitch);
result = svq1_decode_block_non_intra(bc, current, pitch);
break;
case SVQ1_BLOCK_INTRA:
result = svq1_decode_block_intra(bitbuf, current, pitch);
result = svq1_decode_block_intra(bc, current, pitch);
break;
}
return result;
}
static void svq1_parse_string(GetBitContext *bitbuf, uint8_t *out)
static void svq1_parse_string(BitstreamContext *bc, uint8_t *out)
{
uint8_t seed;
int i;
out[0] = get_bits(bitbuf, 8);
out[0] = bitstream_read(bc, 8);
seed = string_table[out[0]];
for (i = 1; i <= out[0]; i++) {
out[i] = get_bits(bitbuf, 8) ^ seed;
out[i] = bitstream_read(bc, 8) ^ seed;
seed = string_table[out[i] ^ seed];
}
}
......@@ -519,14 +519,14 @@ static void svq1_parse_string(GetBitContext *bitbuf, uint8_t *out)
static int svq1_decode_frame_header(AVCodecContext *avctx, AVFrame *frame)
{
SVQ1Context *s = avctx->priv_data;
GetBitContext *bitbuf = &s->gb;
BitstreamContext *bc = &s->bc;
int frame_size_code;
skip_bits(bitbuf, 8); /* temporal_reference */
bitstream_skip(bc, 8); /* temporal_reference */
/* frame type */
s->nonref = 0;
switch (get_bits(bitbuf, 2)) {
switch (bitstream_read(bc, 2)) {
case 0:
frame->pict_type = AV_PICTURE_TYPE_I;
break;
......@@ -543,10 +543,9 @@ static int svq1_decode_frame_header(AVCodecContext *avctx, AVFrame *frame)
if (frame->pict_type == AV_PICTURE_TYPE_I) {
/* unknown fields */
if (s->frame_code == 0x50 || s->frame_code == 0x60) {
int csum = get_bits(bitbuf, 16);
int csum = bitstream_read(bc, 16);
csum = ff_svq1_packet_checksum(bitbuf->buffer,
bitbuf->size_in_bits >> 3,
csum = ff_svq1_packet_checksum(bc->buffer, bc->size_in_bits >> 3,
csum);
ff_dlog(avctx, "%s checksum (%02x) for packet data\n",
......@@ -556,23 +555,23 @@ static int svq1_decode_frame_header(AVCodecContext *avctx, AVFrame *frame)
if ((s->frame_code ^ 0x10) >= 0x50) {
uint8_t msg[256];
svq1_parse_string(bitbuf, msg);
svq1_parse_string(bc, msg);
av_log(avctx, AV_LOG_INFO,
"embedded message: \"%s\"\n", (char *)msg);
}
skip_bits(bitbuf, 2);
skip_bits(bitbuf, 2);
skip_bits1(bitbuf);
bitstream_skip(bc, 2);
bitstream_skip(bc, 2);
bitstream_skip(bc, 1);
/* load frame size */
frame_size_code = get_bits(bitbuf, 3);
frame_size_code = bitstream_read(bc, 3);
if (frame_size_code == 7) {
/* load width, height (12 bits each) */
s->width = get_bits(bitbuf, 12);
s->height = get_bits(bitbuf, 12);
s->width = bitstream_read(bc, 12);
s->height = bitstream_read(bc, 12);
if (!s->width || !s->height)
return AVERROR_INVALIDDATA;
......@@ -584,22 +583,22 @@ static int svq1_decode_frame_header(AVCodecContext *avctx, AVFrame *frame)
}
/* unknown fields */
if (get_bits1(bitbuf) == 1) {
skip_bits1(bitbuf); /* use packet checksum if (1) */
skip_bits1(bitbuf); /* component checksums after image data if (1) */
if (bitstream_read_bit(bc) == 1) {
bitstream_skip(bc, 1); /* use packet checksum if (1) */
bitstream_skip(bc, 1); /* component checksums after image data if (1) */
if (get_bits(bitbuf, 2) != 0)
if (bitstream_read(bc, 2) != 0)
return AVERROR_INVALIDDATA;
}
if (get_bits1(bitbuf) == 1) {
skip_bits1(bitbuf);
skip_bits(bitbuf, 4);
skip_bits1(bitbuf);
skip_bits(bitbuf, 2);
if (bitstream_read_bit(bc) == 1) {
bitstream_skip(bc, 1);
bitstream_skip(bc, 4);
bitstream_skip(bc, 1);
bitstream_skip(bc, 2);
while (get_bits1(bitbuf) == 1)
skip_bits(bitbuf, 8);
while (bitstream_read_bit(bc) == 1)
bitstream_skip(bc, 8);
}
return 0;
......@@ -617,10 +616,10 @@ static int svq1_decode_frame(AVCodecContext *avctx, void *data,
svq1_pmv *pmv;
/* initialize bit buffer */
init_get_bits(&s->gb, buf, buf_size * 8);
bitstream_init(&s->bc, buf, buf_size * 8);
/* decode frame header */
s->frame_code = get_bits(&s->gb, 22);
s->frame_code = bitstream_read(&s->bc, 22);
if ((s->frame_code & ~0x70) || !(s->frame_code & 0x60))
return AVERROR_INVALIDDATA;
......@@ -642,13 +641,14 @@ static int svq1_decode_frame(AVCodecContext *avctx, void *data,
memcpy(s->pkt_swapped, buf, buf_size);
buf = s->pkt_swapped;
init_get_bits(&s->gb, buf, buf_size * 8);
skip_bits(&s->gb, 22);
src = (uint32_t *)(s->pkt_swapped + 4);
for (i = 0; i < 4; i++)
src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i];
bitstream_init(&s->bc, buf, buf_size * 8);
bitstream_skip(&s->bc, 22);
}
result = svq1_decode_frame_header(avctx, cur);
......@@ -695,7 +695,7 @@ static int svq1_decode_frame(AVCodecContext *avctx, void *data,
/* keyframe */
for (y = 0; y < height; y += 16) {
for (x = 0; x < width; x += 16) {
result = svq1_decode_block_intra(&s->gb, &current[x],
result = svq1_decode_block_intra(&s->bc, &current[x],
linesize);
if (result != 0) {
av_log(avctx, AV_LOG_INFO,
......@@ -721,7 +721,7 @@ static int svq1_decode_frame(AVCodecContext *avctx, void *data,
for (y = 0; y < height; y += 16) {
for (x = 0; x < width; x += 16) {
result = svq1_decode_delta_block(avctx, &s->hdsp,
&s->gb, &current[x],
&s->bc, &current[x],
previous, linesize,
pmv, x, y, width, height);
if (result != 0) {
......
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