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ffmpeg.wasm-core
Commit 66f09105 authored by Vittorio Giovara's avatar Vittorio Giovara Committed by Diego Biurrun
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mpeg12enc: drop forward declarations 

Signed-off-by: 's avatarDiego Biurrun <diego@biurrun.de>
parent c3e6e8f0
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Showing with 158 additions and 163 deletions
libavcodec/mpeg12enc.c
View file @ 66f09105
......@@ -50,11 +50,6 @@ static const uint8_t svcd_scan_offset_placeholder[14] = {
0xff, 0xff, 0xff,
};
static void mpeg1_encode_block(MpegEncContext *s,
int16_t *block,
int component);
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
static uint8_t fcode_tab[MAX_MV*2+1];
......@@ -432,6 +427,164 @@ static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
}
}
// RAL: Parameter added: f_or_b_code
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
{
if (val == 0) {
/* zero vector */
put_bits(&s->pb,
ff_mpeg12_mbMotionVectorTable[0][1],
ff_mpeg12_mbMotionVectorTable[0][0]);
} else {
int code, sign, bits;
int bit_size = f_or_b_code - 1;
int range = 1 << bit_size;
/* modulo encoding */
val = sign_extend(val, 5 + bit_size);
if (val >= 0) {
val--;
code = (val >> bit_size) + 1;
bits = val & (range - 1);
sign = 0;
} else {
val = -val;
val--;
code = (val >> bit_size) + 1;
bits = val & (range - 1);
sign = 1;
}
assert(code > 0 && code <= 16);
put_bits(&s->pb,
ff_mpeg12_mbMotionVectorTable[code][1],
ff_mpeg12_mbMotionVectorTable[code][0]);
put_bits(&s->pb, 1, sign);
if (bit_size > 0) {
put_bits(&s->pb, bit_size, bits);
}
}
}
static inline void encode_dc(MpegEncContext *s, int diff, int component)
{
if(((unsigned) (diff+255)) >= 511){
int index;
if(diff<0){
index= av_log2_16bit(-2*diff);
diff--;
}else{
index= av_log2_16bit(2*diff);
}
if (component == 0) {
put_bits(
&s->pb,
ff_mpeg12_vlc_dc_lum_bits[index] + index,
(ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
}else{
put_bits(
&s->pb,
ff_mpeg12_vlc_dc_chroma_bits[index] + index,
(ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
}
}else{
if (component == 0) {
put_bits(
&s->pb,
mpeg1_lum_dc_uni[diff+255]&0xFF,
mpeg1_lum_dc_uni[diff+255]>>8);
} else {
put_bits(
&s->pb,
mpeg1_chr_dc_uni[diff+255]&0xFF,
mpeg1_chr_dc_uni[diff+255]>>8);
}
}
}
static void mpeg1_encode_block(MpegEncContext *s,
int16_t *block,
int n)
{
int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
int code, component;
const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
last_index = s->block_last_index[n];
/* DC coef */
if (s->mb_intra) {
component = (n <= 3 ? 0 : (n&1) + 1);
dc = block[0]; /* overflow is impossible */
diff = dc - s->last_dc[component];
encode_dc(s, diff, component);
s->last_dc[component] = dc;
i = 1;
if (s->intra_vlc_format)
table_vlc = ff_rl_mpeg2.table_vlc;
} else {
/* encode the first coefficient : needs to be done here because
it is handled slightly differently */
level = block[0];
if (abs(level) == 1) {
code = ((uint32_t)level >> 31); /* the sign bit */
put_bits(&s->pb, 2, code | 0x02);
i = 1;
} else {
i = 0;
last_non_zero = -1;
goto next_coef;
}
}
/* now quantify & encode AC coefs */
last_non_zero = i - 1;
for(;i<=last_index;i++) {
j = s->intra_scantable.permutated[i];
level = block[j];
next_coef:
/* encode using VLC */
if (level != 0) {
run = i - last_non_zero - 1;
alevel= level;
MASK_ABS(sign, alevel);
sign&=1;
if (alevel <= mpeg1_max_level[0][run]){
code= mpeg1_index_run[0][run] + alevel - 1;
/* store the vlc & sign at once */
put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
} else {
/* escape seems to be pretty rare <5% so I do not optimize it */
put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
/* escape: only clip in this case */
put_bits(&s->pb, 6, run);
if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO){
if (alevel < 128) {
put_sbits(&s->pb, 8, level);
} else {
if (level < 0) {
put_bits(&s->pb, 16, 0x8001 + level + 255);
} else {
put_sbits(&s->pb, 16, level);
}
}
}else{
put_sbits(&s->pb, 12, level);
}
}
last_non_zero = i;
}
}
/* end of block */
put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
}
static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
int16_t block[6][64],
int motion_x, int motion_y,
......@@ -663,47 +816,6 @@ void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[6][64], int motion_x, i
else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
}
// RAL: Parameter added: f_or_b_code
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
{
if (val == 0) {
/* zero vector */
put_bits(&s->pb,
ff_mpeg12_mbMotionVectorTable[0][1],
ff_mpeg12_mbMotionVectorTable[0][0]);
} else {
int code, sign, bits;
int bit_size = f_or_b_code - 1;
int range = 1 << bit_size;
/* modulo encoding */
val = sign_extend(val, 5 + bit_size);
if (val >= 0) {
val--;
code = (val >> bit_size) + 1;
bits = val & (range - 1);
sign = 0;
} else {
val = -val;
val--;
code = (val >> bit_size) + 1;
bits = val & (range - 1);
sign = 1;
}
assert(code > 0 && code <= 16);
put_bits(&s->pb,
ff_mpeg12_mbMotionVectorTable[code][1],
ff_mpeg12_mbMotionVectorTable[code][0]);
put_bits(&s->pb, 1, sign);
if (bit_size > 0) {
put_bits(&s->pb, bit_size, bits);
}
}
}
av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
{
static int done=0;
......@@ -802,123 +914,6 @@ av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
}
static inline void encode_dc(MpegEncContext *s, int diff, int component)
{
if(((unsigned) (diff+255)) >= 511){
int index;
if(diff<0){
index= av_log2_16bit(-2*diff);
diff--;
}else{
index= av_log2_16bit(2*diff);
}
if (component == 0) {
put_bits(
&s->pb,
ff_mpeg12_vlc_dc_lum_bits[index] + index,
(ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
}else{
put_bits(
&s->pb,
ff_mpeg12_vlc_dc_chroma_bits[index] + index,
(ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
}
}else{
if (component == 0) {
put_bits(
&s->pb,
mpeg1_lum_dc_uni[diff+255]&0xFF,
mpeg1_lum_dc_uni[diff+255]>>8);
} else {
put_bits(
&s->pb,
mpeg1_chr_dc_uni[diff+255]&0xFF,
mpeg1_chr_dc_uni[diff+255]>>8);
}
}
}
static void mpeg1_encode_block(MpegEncContext *s,
int16_t *block,
int n)
{
int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
int code, component;
const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
last_index = s->block_last_index[n];
/* DC coef */
if (s->mb_intra) {
component = (n <= 3 ? 0 : (n&1) + 1);
dc = block[0]; /* overflow is impossible */
diff = dc - s->last_dc[component];
encode_dc(s, diff, component);
s->last_dc[component] = dc;
i = 1;
if (s->intra_vlc_format)
table_vlc = ff_rl_mpeg2.table_vlc;
} else {
/* encode the first coefficient : needs to be done here because
it is handled slightly differently */
level = block[0];
if (abs(level) == 1) {
code = ((uint32_t)level >> 31); /* the sign bit */
put_bits(&s->pb, 2, code | 0x02);
i = 1;
} else {
i = 0;
last_non_zero = -1;
goto next_coef;
}
}
/* now quantify & encode AC coefs */
last_non_zero = i - 1;
for(;i<=last_index;i++) {
j = s->intra_scantable.permutated[i];
level = block[j];
next_coef:
/* encode using VLC */
if (level != 0) {
run = i - last_non_zero - 1;
alevel= level;
MASK_ABS(sign, alevel);
sign&=1;
if (alevel <= mpeg1_max_level[0][run]){
code= mpeg1_index_run[0][run] + alevel - 1;
/* store the vlc & sign at once */
put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
} else {
/* escape seems to be pretty rare <5% so I do not optimize it */
put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
/* escape: only clip in this case */
put_bits(&s->pb, 6, run);
if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO){
if (alevel < 128) {
put_sbits(&s->pb, 8, level);
} else {
if (level < 0) {
put_bits(&s->pb, 16, 0x8001 + level + 255);
} else {
put_sbits(&s->pb, 16, level);
}
}
}else{
put_sbits(&s->pb, 12, level);
}
}
last_non_zero = i;
}
}
/* end of block */
put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
}
#define OFFSET(x) offsetof(MpegEncContext, x)
#define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
#define COMMON_OPTS\
......
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