5d2231ee |
/*
* DV decoder |
406792e7 |
* Copyright (c) 2002 Fabrice Bellard
* Copyright (c) 2004 Roman Shaposhnik |
5d2231ee |
* |
115329f1 |
* DV encoder |
406792e7 |
* Copyright (c) 2003 Roman Shaposhnik |
4fa1c4fa |
* |
0b297700 |
* 50 Mbps (DVCPRO50) support
* Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com>
* |
f8007a14 |
* 100 Mbps (DVCPRO HD) support
* Initial code by Daniel Maas <dmaas@maasdigital.com> (funded by BBC R&D)
* Final code by Roman Shaposhnik
* |
4fa1c4fa |
* Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
* of DV technical info.
* |
b78e7197 |
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or |
5d2231ee |
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either |
b78e7197 |
* version 2.1 of the License, or (at your option) any later version. |
5d2231ee |
* |
b78e7197 |
* FFmpeg is distributed in the hope that it will be useful, |
5d2231ee |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public |
b78e7197 |
* License along with FFmpeg; if not, write to the Free Software |
5509bffa |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
5d2231ee |
*/ |
983e3246 |
/** |
ba87f080 |
* @file |
4fa1c4fa |
* DV codec. |
983e3246 |
*/ |
a1e98f19 |
|
94bed8e5 |
#include "libavutil/pixdesc.h" |
5d2231ee |
#include "avcodec.h"
#include "dsputil.h" |
9106a698 |
#include "get_bits.h" |
6a047213 |
#include "internal.h" |
b2755007 |
#include "put_bits.h" |
5d2231ee |
#include "simple_idct.h" |
7458ccbb |
#include "dvdata.h" |
c787cb33 |
#include "dv_tablegen.h" |
5d2231ee |
/* XXX: also include quantization */ |
d724fe66 |
RL_VLC_ELEM ff_dv_rl_vlc[1184]; |
c3d470b4 |
|
195b3490 |
static inline void dv_calc_mb_coordinates(const DVprofile *d, int chan, int seq, int slot,
uint16_t *tbl)
{ |
1bf6e565 |
static const uint8_t off[] = { 2, 6, 8, 0, 4 };
static const uint8_t shuf1[] = { 36, 18, 54, 0, 72 };
static const uint8_t shuf2[] = { 24, 12, 36, 0, 48 };
static const uint8_t shuf3[] = { 18, 9, 27, 0, 36 }; |
195b3490 |
|
1bf6e565 |
static const uint8_t l_start[] = {0, 4, 9, 13, 18, 22, 27, 31, 36, 40};
static const uint8_t l_start_shuffled[] = { 9, 4, 13, 0, 18 }; |
195b3490 |
|
1bf6e565 |
static const uint8_t serpent1[] = {0, 1, 2, 2, 1, 0, |
195b3490 |
0, 1, 2, 2, 1, 0,
0, 1, 2, 2, 1, 0,
0, 1, 2, 2, 1, 0,
0, 1, 2}; |
1bf6e565 |
static const uint8_t serpent2[] = {0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0, |
195b3490 |
0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0,
0, 1, 2, 3, 4, 5};
|
1bf6e565 |
static const uint8_t remap[][2] = {{ 0, 0}, { 0, 0}, { 0, 0}, { 0, 0}, /* dummy */ |
195b3490 |
{ 0, 0}, { 0, 1}, { 0, 2}, { 0, 3}, {10, 0},
{10, 1}, {10, 2}, {10, 3}, {20, 0}, {20, 1},
{20, 2}, {20, 3}, {30, 0}, {30, 1}, {30, 2},
{30, 3}, {40, 0}, {40, 1}, {40, 2}, {40, 3},
{50, 0}, {50, 1}, {50, 2}, {50, 3}, {60, 0},
{60, 1}, {60, 2}, {60, 3}, {70, 0}, {70, 1},
{70, 2}, {70, 3}, { 0,64}, { 0,65}, { 0,66},
{10,64}, {10,65}, {10,66}, {20,64}, {20,65},
{20,66}, {30,64}, {30,65}, {30,66}, {40,64},
{40,65}, {40,66}, {50,64}, {50,65}, {50,66},
{60,64}, {60,65}, {60,66}, {70,64}, {70,65},
{70,66}, { 0,67}, {20,67}, {40,67}, {60,67}};
int i, k, m;
int x, y, blk;
for (m=0; m<5; m++) {
switch (d->width) {
case 1440:
blk = (chan*11+seq)*27+slot;
if (chan == 0 && seq == 11) {
x = m*27+slot;
if (x<90) {
y = 0;
} else {
x = (x - 90)*2;
y = 67;
}
} else {
i = (4*chan + blk + off[m])%11;
k = (blk/11)%27;
x = shuf1[m] + (chan&1)*9 + k%9;
y = (i*3+k/9)*2 + (chan>>1) + 1;
}
tbl[m] = (x<<1)|(y<<9);
break;
case 1280:
blk = (chan*10+seq)*27+slot;
i = (4*chan + (seq/5) + 2*blk + off[m])%10;
k = (blk/5)%27;
x = shuf1[m]+(chan&1)*9 + k%9;
y = (i*3+k/9)*2 + (chan>>1) + 4;
if (x >= 80) {
x = remap[y][0]+((x-80)<<(y>59));
y = remap[y][1];
}
tbl[m] = (x<<1)|(y<<9);
break;
case 960:
blk = (chan*10+seq)*27+slot;
i = (4*chan + (seq/5) + 2*blk + off[m])%10;
k = (blk/5)%27 + (i&1)*3;
x = shuf2[m] + k%6 + 6*(chan&1);
y = l_start[i] + k/6 + 45*(chan>>1);
tbl[m] = (x<<1)|(y<<9);
break;
case 720:
switch (d->pix_fmt) {
case PIX_FMT_YUV422P:
x = shuf3[m] + slot/3;
y = serpent1[slot] +
((((seq + off[m]) % d->difseg_size)<<1) + chan)*3;
tbl[m] = (x<<1)|(y<<8);
break;
case PIX_FMT_YUV420P:
x = shuf3[m] + slot/3;
y = serpent1[slot] +
((seq + off[m]) % d->difseg_size)*3;
tbl[m] = (x<<1)|(y<<9);
break;
case PIX_FMT_YUV411P:
i = (seq + off[m]) % d->difseg_size;
k = slot + ((m==1||m==2)?3:0);
x = l_start_shuffled[m] + k/6;
y = serpent2[k] + i*6;
if (x>21)
y = y*2 - i*6;
tbl[m] = (x<<2)|(y<<8);
break;
}
default:
break;
}
}
}
|
05afc5f5 |
/* quantization quanta by QNO for DV100 */
static const uint8_t dv100_qstep[16] = {
1, /* QNO = 0 and 1 both have no quantization */
1,
2, 3, 4, 5, 6, 7, 8, 16, 18, 20, 22, 24, 28, 52
};
static const uint8_t dv_quant_areas[4] = { 6, 21, 43, 64 };
|
d724fe66 |
int ff_dv_init_dynamic_tables(const DVprofile *d) |
c3d470b4 |
{ |
195b3490 |
int j,i,c,s,p; |
a21fd75f |
uint32_t *factor1, *factor2;
const int *iweight1, *iweight2; |
c3d470b4 |
|
ff16d6e4 |
if (!d->work_chunks[dv_work_pool_size(d)-1].buf_offset) {
p = i = 0;
for (c=0; c<d->n_difchan; c++) {
for (s=0; s<d->difseg_size; s++) {
p += 6;
for (j=0; j<27; j++) {
p += !(j%3);
if (!(DV_PROFILE_IS_1080i50(d) && c != 0 && s == 11) &&
!(DV_PROFILE_IS_720p50(d) && s > 9)) {
dv_calc_mb_coordinates(d, c, s, j, &d->work_chunks[i].mb_coordinates[0]);
d->work_chunks[i++].buf_offset = p;
}
p += 5;
} |
c3d470b4 |
}
}
}
|
a21fd75f |
if (!d->idct_factor[DV_PROFILE_IS_HD(d)?8191:5631]) {
factor1 = &d->idct_factor[0];
factor2 = &d->idct_factor[DV_PROFILE_IS_HD(d)?4096:2816];
if (d->height == 720) { |
a3dbd459 |
iweight1 = &ff_dv_iweight_720_y[0];
iweight2 = &ff_dv_iweight_720_c[0]; |
a21fd75f |
} else { |
a3dbd459 |
iweight1 = &ff_dv_iweight_1080_y[0];
iweight2 = &ff_dv_iweight_1080_c[0]; |
5b9c11ff |
} |
a21fd75f |
if (DV_PROFILE_IS_HD(d)) {
for (c = 0; c < 4; c++) {
for (s = 0; s < 16; s++) {
for (i = 0; i < 64; i++) {
*factor1++ = (dv100_qstep[s] << (c + 9)) * iweight1[i];
*factor2++ = (dv100_qstep[s] << (c + 9)) * iweight2[i];
}
} |
d557838c |
} |
a21fd75f |
} else { |
a3dbd459 |
iweight1 = &ff_dv_iweight_88[0];
for (j = 0; j < 2; j++, iweight1 = &ff_dv_iweight_248[0]) { |
a21fd75f |
for (s = 0; s < 22; s++) {
for (i = c = 0; c < 4; c++) {
for (; i < dv_quant_areas[c]; i++) { |
a3dbd459 |
*factor1 = iweight1[i] << (ff_dv_quant_shifts[s][c] + 1); |
a21fd75f |
*factor2++ = (*factor1++) << 1; |
5b9c11ff |
}
}
} |
f8007a14 |
}
}
} |
5d2231ee |
|
a21fd75f |
return 0;
}
|
d724fe66 |
av_cold int ff_dvvideo_init(AVCodecContext *avctx) |
5d2231ee |
{ |
6faa4645 |
DVVideoContext *s = avctx->priv_data; |
10acc479 |
DSPContext dsp; |
f94036f1 |
static int done = 0; |
e15c3302 |
int i, j; |
5d2231ee |
if (!done) { |
7458ccbb |
VLC dv_vlc; |
901ee2be |
uint16_t new_dv_vlc_bits[NB_DV_VLC*2]; |
f94036f1 |
uint8_t new_dv_vlc_len[NB_DV_VLC*2];
uint8_t new_dv_vlc_run[NB_DV_VLC*2];
int16_t new_dv_vlc_level[NB_DV_VLC*2]; |
5d2231ee |
done = 1;
|
bb270c08 |
/* it's faster to include sign bit in a generic VLC parsing scheme */ |
f94036f1 |
for (i = 0, j = 0; i < NB_DV_VLC; i++, j++) {
new_dv_vlc_bits[j] = dv_vlc_bits[i];
new_dv_vlc_len[j] = dv_vlc_len[i];
new_dv_vlc_run[j] = dv_vlc_run[i]; |
bb270c08 |
new_dv_vlc_level[j] = dv_vlc_level[i];
if (dv_vlc_level[i]) {
new_dv_vlc_bits[j] <<= 1;
new_dv_vlc_len[j]++;
j++; |
f94036f1 |
new_dv_vlc_bits[j] = (dv_vlc_bits[i] << 1) | 1;
new_dv_vlc_len[j] = dv_vlc_len[i] + 1;
new_dv_vlc_run[j] = dv_vlc_run[i]; |
bb270c08 |
new_dv_vlc_level[j] = -dv_vlc_level[i];
}
} |
115329f1 |
|
5d2231ee |
/* NOTE: as a trick, we use the fact the no codes are unused
to accelerate the parsing of partial codes */ |
115329f1 |
init_vlc(&dv_vlc, TEX_VLC_BITS, j, |
073c2593 |
new_dv_vlc_len, 1, 1, new_dv_vlc_bits, 2, 2, 0); |
2df6e978 |
assert(dv_vlc.table_size == 1184); |
aa066582 |
|
f94036f1 |
for (i = 0; i < dv_vlc.table_size; i++){
int code = dv_vlc.table[i][0];
int len = dv_vlc.table[i][1]; |
5d2231ee |
int level, run; |
115329f1 |
|
f94036f1 |
if (len < 0){ //more bits needed
run = 0;
level = code; |
5d2231ee |
} else { |
f94036f1 |
run = new_dv_vlc_run [code] + 1;
level = new_dv_vlc_level[code]; |
5d2231ee |
} |
d724fe66 |
ff_dv_rl_vlc[i].len = len;
ff_dv_rl_vlc[i].level = level;
ff_dv_rl_vlc[i].run = run; |
5d2231ee |
} |
e96b4a53 |
ff_free_vlc(&dv_vlc); |
5d2231ee |
} |
7be166e4 |
|
10acc479 |
/* Generic DSP setup */ |
9cf0841e |
ff_dsputil_init(&dsp, avctx); |
94ed2a30 |
ff_set_cmp(&dsp, dsp.ildct_cmp, avctx->ildct_cmp); |
10acc479 |
s->get_pixels = dsp.get_pixels; |
94ed2a30 |
s->ildct_cmp = dsp.ildct_cmp[5]; |
7be166e4 |
|
10acc479 |
/* 88DCT setup */ |
f94036f1 |
s->fdct[0] = dsp.fdct; |
10acc479 |
s->idct_put[0] = dsp.idct_put; |
f94036f1 |
for (i = 0; i < 64; i++) |
10acc479 |
s->dv_zigzag[0][i] = dsp.idct_permutation[ff_zigzag_direct[i]]; |
7be166e4 |
|
10acc479 |
/* 248DCT setup */ |
f94036f1 |
s->fdct[1] = dsp.fdct248; |
59e6f60a |
s->idct_put[1] = ff_simple_idct248_put; // FIXME: need to add it to DSP |
70d54392 |
if (avctx->lowres){
for (i = 0; i < 64; i++){
int j = ff_zigzag248_direct[i];
s->dv_zigzag[1][i] = dsp.idct_permutation[(j & 7) + (j & 8) * 4 + (j & 48) / 2];
}
}else
memcpy(s->dv_zigzag[1], ff_zigzag248_direct, 64); |
7be166e4 |
|
2744ca9a |
avctx->coded_frame = &s->picture; |
f94036f1 |
s->avctx = avctx; |
580a7465 |
avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; |
115329f1 |
|
5d2231ee |
return 0;
}
|
6d01a97c |
static av_cold int dvvideo_init_encoder(AVCodecContext *avctx)
{ |
242c73a0 |
if (!avpriv_dv_codec_profile(avctx)) { |
a839dbb9 |
av_log(avctx, AV_LOG_ERROR, "Found no DV profile for %ix%i %s video. "
"Valid DV profiles are:\n", |
94bed8e5 |
avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt)); |
a839dbb9 |
ff_dv_print_profiles(avctx, AV_LOG_ERROR);
return AVERROR(EINVAL); |
6d01a97c |
}
|
2b983779 |
dv_vlc_map_tableinit();
|
d724fe66 |
return ff_dvvideo_init(avctx); |
6d01a97c |
}
|
e15c3302 |
/* bit budget for AC only in 5 MBs */
static const int vs_total_ac_bits = (100 * 4 + 68*2) * 5; |
115329f1 |
static const int mb_area_start[5] = { 1, 6, 21, 43, 64 }; |
5d2231ee |
|
58254257 |
static inline int put_bits_left(PutBitContext* s)
{
return (s->buf_end - s->buf) * 8 - put_bits_count(s);
}
|
49fb20cb |
#if CONFIG_SMALL |
50f8c265 |
/* Converts run and level (where level != 0) pair into VLC, returning bit size */ |
849f1035 |
static av_always_inline int dv_rl2vlc(int run, int level, int sign, uint32_t* vlc) |
4fa1c4fa |
{
int size; |
e15c3302 |
if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) {
*vlc = dv_vlc_map[run][level].vlc | sign; |
bb270c08 |
size = dv_vlc_map[run][level].size; |
4fa1c4fa |
} |
115329f1 |
else { |
e15c3302 |
if (level < DV_VLC_MAP_LEV_SIZE) { |
bb270c08 |
*vlc = dv_vlc_map[0][level].vlc | sign;
size = dv_vlc_map[0][level].size;
} else { |
e15c3302 |
*vlc = 0xfe00 | (level << 1) | sign; |
bb270c08 |
size = 16;
}
if (run) {
*vlc |= ((run < 16) ? dv_vlc_map[run-1][0].vlc :
(0x1f80 | (run - 1))) << size; |
f94036f1 |
size += (run < 16) ? dv_vlc_map[run-1][0].size : 13; |
bb270c08 |
} |
4fa1c4fa |
} |
115329f1 |
|
4fa1c4fa |
return size;
}
|
849f1035 |
static av_always_inline int dv_rl2vlc_size(int run, int level) |
e15c3302 |
{
int size; |
115329f1 |
|
e15c3302 |
if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) { |
bb270c08 |
size = dv_vlc_map[run][level].size; |
e15c3302 |
} |
115329f1 |
else { |
bb270c08 |
size = (level < DV_VLC_MAP_LEV_SIZE) ? dv_vlc_map[0][level].size : 16;
if (run) {
size += (run < 16) ? dv_vlc_map[run-1][0].size : 13;
} |
e15c3302 |
}
return size;
}
#else |
849f1035 |
static av_always_inline int dv_rl2vlc(int run, int l, int sign, uint32_t* vlc) |
e15c3302 |
{ |
c619ff6d |
*vlc = dv_vlc_map[run][l].vlc | sign;
return dv_vlc_map[run][l].size; |
e15c3302 |
}
|
849f1035 |
static av_always_inline int dv_rl2vlc_size(int run, int l) |
e15c3302 |
{ |
c619ff6d |
return dv_vlc_map[run][l].size; |
e15c3302 |
}
#endif
|
4fa1c4fa |
typedef struct EncBlockInfo { |
f94036f1 |
int area_q[4];
int bit_size[4];
int prev[5];
int cur_ac;
int cno;
int dct_mode;
DCTELEM mb[64];
uint8_t next[64];
uint8_t sign[64];
uint8_t partial_bit_count; |
e15c3302 |
uint32_t partial_bit_buffer; /* we can't use uint16_t here */ |
4fa1c4fa |
} EncBlockInfo;
|
f94036f1 |
static av_always_inline PutBitContext* dv_encode_ac(EncBlockInfo* bi,
PutBitContext* pb_pool,
PutBitContext* pb_end) |
4fa1c4fa |
{ |
f94036f1 |
int prev, bits_left; |
e15c3302 |
PutBitContext* pb = pb_pool;
int size = bi->partial_bit_count;
uint32_t vlc = bi->partial_bit_buffer; |
c619ff6d |
|
e15c3302 |
bi->partial_bit_count = bi->partial_bit_buffer = 0; |
f94036f1 |
for (;;){ |
e15c3302 |
/* Find suitable storage space */ |
e7a18d5d |
for (; size > (bits_left = put_bits_left(pb)); pb++) { |
e15c3302 |
if (bits_left) {
size -= bits_left; |
bb270c08 |
put_bits(pb, bits_left, vlc >> size); |
f94036f1 |
vlc = vlc & ((1 << size) - 1); |
bb270c08 |
}
if (pb + 1 >= pb_end) { |
f94036f1 |
bi->partial_bit_count = size; |
bb270c08 |
bi->partial_bit_buffer = vlc;
return pb;
} |
e15c3302 |
} |
115329f1 |
|
e15c3302 |
/* Store VLC */
put_bits(pb, size, vlc); |
115329f1 |
|
f94036f1 |
if (bi->cur_ac >= 64) |
c619ff6d |
break; |
115329f1 |
|
e15c3302 |
/* Construct the next VLC */ |
f94036f1 |
prev = bi->cur_ac; |
c619ff6d |
bi->cur_ac = bi->next[prev]; |
f94036f1 |
if (bi->cur_ac < 64){ |
c619ff6d |
size = dv_rl2vlc(bi->cur_ac - prev - 1, bi->mb[bi->cur_ac], bi->sign[bi->cur_ac], &vlc);
} else { |
e15c3302 |
size = 4; vlc = 6; /* End Of Block stamp */
} |
c619ff6d |
}
return pb; |
4fa1c4fa |
}
|
94ed2a30 |
static av_always_inline int dv_guess_dct_mode(DVVideoContext *s, uint8_t *data, int linesize) {
if (s->avctx->flags & CODEC_FLAG_INTERLACED_DCT) {
int ps = s->ildct_cmp(NULL, data, NULL, linesize, 8) - 400;
if (ps > 0) {
int is = s->ildct_cmp(NULL, data , NULL, linesize<<1, 4) +
s->ildct_cmp(NULL, data + linesize, NULL, linesize<<1, 4); |
d4b63054 |
return ps > is; |
94ed2a30 |
} |
ce83d2bd |
}
return 0; |
2331854d |
}
|
05afc5f5 |
static const int dv_weight_bits = 18;
static const int dv_weight_88[64] = {
131072, 257107, 257107, 242189, 252167, 242189, 235923, 237536,
237536, 235923, 229376, 231390, 223754, 231390, 229376, 222935,
224969, 217965, 217965, 224969, 222935, 200636, 218652, 211916,
212325, 211916, 218652, 200636, 188995, 196781, 205965, 206433,
206433, 205965, 196781, 188995, 185364, 185364, 200636, 200704,
200636, 185364, 185364, 174609, 180568, 195068, 195068, 180568,
174609, 170091, 175557, 189591, 175557, 170091, 165371, 170627,
170627, 165371, 160727, 153560, 160727, 144651, 144651, 136258,
};
static const int dv_weight_248[64] = {
131072, 242189, 257107, 237536, 229376, 200636, 242189, 223754,
224969, 196781, 262144, 242189, 229376, 200636, 257107, 237536,
211916, 185364, 235923, 217965, 229376, 211916, 206433, 180568,
242189, 223754, 224969, 196781, 211916, 185364, 235923, 217965,
200704, 175557, 222935, 205965, 200636, 185364, 195068, 170627,
229376, 211916, 206433, 180568, 200704, 175557, 222935, 205965,
175557, 153560, 188995, 174609, 165371, 144651, 200636, 185364,
195068, 170627, 175557, 153560, 188995, 174609, 165371, 144651,
};
|
9b8390bf |
static av_always_inline int dv_init_enc_block(EncBlockInfo* bi, uint8_t *data, int linesize, DVVideoContext *s, int bias) |
4fa1c4fa |
{ |
9b8390bf |
const int *weight;
const uint8_t* zigzag_scan; |
40d11227 |
LOCAL_ALIGNED_16(DCTELEM, blk, [64]); |
e15c3302 |
int i, area; |
40116978 |
/* We offer two different methods for class number assignment: the
method suggested in SMPTE 314M Table 22, and an improved
method. The SMPTE method is very conservative; it assigns class
3 (i.e. severe quantization) to any block where the largest AC |
2d2b5a14 |
component is greater than 36. FFmpeg's DV encoder tracks AC bit |
40116978 |
consumption precisely, so there is no need to bias most blocks
towards strongly lossy compression. Instead, we assign class 2
to most blocks, and use class 3 only when strictly necessary
(for blocks whose largest AC component exceeds 255). */
#if 0 /* SMPTE spec method */ |
c619ff6d |
static const int classes[] = {12, 24, 36, 0xffff}; |
2d2b5a14 |
#else /* improved FFmpeg method */ |
40116978 |
static const int classes[] = {-1, -1, 255, 0xffff};
#endif |
f94036f1 |
int max = classes[0];
int prev = 0; |
e15c3302 |
|
9b8390bf |
assert((((int)blk) & 15) == 0);
bi->area_q[0] = bi->area_q[1] = bi->area_q[2] = bi->area_q[3] = 0;
bi->partial_bit_count = 0;
bi->partial_bit_buffer = 0;
bi->cur_ac = 0;
if (data) { |
94ed2a30 |
bi->dct_mode = dv_guess_dct_mode(s, data, linesize); |
9b8390bf |
s->get_pixels(blk, data, linesize);
s->fdct[bi->dct_mode](blk);
} else {
/* We rely on the fact that encoding all zeros leads to an immediate EOB,
which is precisely what the spec calls for in the "dummy" blocks. */ |
40d11227 |
memset(blk, 0, 64*sizeof(*blk)); |
9b8390bf |
bi->dct_mode = 0;
} |
115329f1 |
bi->mb[0] = blk[0];
|
9b8390bf |
zigzag_scan = bi->dct_mode ? ff_zigzag248_direct : ff_zigzag_direct;
weight = bi->dct_mode ? dv_weight_248 : dv_weight_88;
|
e15c3302 |
for (area = 0; area < 4; area++) { |
f94036f1 |
bi->prev[area] = prev; |
c619ff6d |
bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :) |
f94036f1 |
for (i = mb_area_start[area]; i < mb_area_start[area+1]; i++) { |
c619ff6d |
int level = blk[zigzag_scan[i]]; |
115329f1 |
|
f94036f1 |
if (level + 15 > 30U) {
bi->sign[i] = (level >> 31) & 1; |
50f8c265 |
/* weight it and and shift down into range, adding for rounding */ |
2e52b44e |
/* the extra division by a factor of 2^4 reverses the 8x expansion of the DCT
AND the 2x doubling of the weights */ |
f94036f1 |
level = (FFABS(level) * weight[i] + (1 << (dv_weight_bits+3))) >> (dv_weight_bits+4); |
2e52b44e |
bi->mb[i] = level; |
f94036f1 |
if (level > max)
max = level; |
c619ff6d |
bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, level);
bi->next[prev]= i; |
f94036f1 |
prev = i; |
c619ff6d |
} |
e15c3302 |
} |
4fa1c4fa |
} |
c619ff6d |
bi->next[prev]= i; |
f94036f1 |
for (bi->cno = 0; max > classes[bi->cno]; bi->cno++); |
c619ff6d |
|
e15c3302 |
bi->cno += bias; |
115329f1 |
|
c619ff6d |
if (bi->cno >= 3) { |
4fa1c4fa |
bi->cno = 3; |
f94036f1 |
prev = 0;
i = bi->next[prev]; |
c619ff6d |
for (area = 0; area < 4; area++) { |
f94036f1 |
bi->prev[area] = prev; |
c619ff6d |
bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :) |
f94036f1 |
for (; i < mb_area_start[area+1]; i = bi->next[i]) {
bi->mb[i] >>= 1; |
115329f1 |
|
c619ff6d |
if (bi->mb[i]) {
bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, bi->mb[i]);
bi->next[prev]= i; |
f94036f1 |
prev = i; |
c619ff6d |
}
}
}
bi->next[prev]= i; |
e15c3302 |
} |
9b8390bf |
return bi->bit_size[0] + bi->bit_size[1] + bi->bit_size[2] + bi->bit_size[3]; |
4fa1c4fa |
}
|
e15c3302 |
static inline void dv_guess_qnos(EncBlockInfo* blks, int* qnos)
{
int size[5]; |
d2d230a7 |
int i, j, k, a, prev, a2; |
e15c3302 |
EncBlockInfo* b; |
c619ff6d |
|
f94036f1 |
size[0] = size[1] = size[2] = size[3] = size[4] = 1 << 24; |
e15c3302 |
do {
b = blks; |
f94036f1 |
for (i = 0; i < 5; i++) { |
e15c3302 |
if (!qnos[i]) |
bb270c08 |
continue; |
115329f1 |
|
bb270c08 |
qnos[i]--;
size[i] = 0; |
f94036f1 |
for (j = 0; j < 6; j++, b++) {
for (a = 0; a < 4; a++) { |
a3dbd459 |
if (b->area_q[a] != ff_dv_quant_shifts[qnos[i] + ff_dv_quant_offset[b->cno]][a]) { |
bb270c08 |
b->bit_size[a] = 1; // 4 areas 4 bits for EOB :)
b->area_q[a]++; |
f94036f1 |
prev = b->prev[a]; |
d676478c |
assert(b->next[prev] >= mb_area_start[a+1] || b->mb[prev]); |
f94036f1 |
for (k = b->next[prev] ; k < mb_area_start[a+1]; k = b->next[k]) { |
bb270c08 |
b->mb[k] >>= 1;
if (b->mb[k]) { |
c619ff6d |
b->bit_size[a] += dv_rl2vlc_size(k - prev - 1, b->mb[k]); |
f94036f1 |
prev = k; |
c619ff6d |
} else { |
f94036f1 |
if (b->next[k] >= mb_area_start[a+1] && b->next[k]<64){
for (a2 = a + 1; b->next[k] >= mb_area_start[a2+1]; a2++) |
6df5f6ae |
b->prev[a2] = prev; |
f94036f1 |
assert(a2 < 4); |
d2d230a7 |
assert(b->mb[b->next[k]]);
b->bit_size[a2] += dv_rl2vlc_size(b->next[k] - prev - 1, b->mb[b->next[k]])
-dv_rl2vlc_size(b->next[k] - k - 1, b->mb[b->next[k]]); |
f94036f1 |
assert(b->prev[a2] == k && (a2 + 1 >= 4 || b->prev[a2+1] != k)); |
d676478c |
b->prev[a2] = prev; |
d2d230a7 |
} |
c619ff6d |
b->next[prev] = b->next[k];
} |
bb270c08 |
} |
c619ff6d |
b->prev[a+1]= prev; |
bb270c08 |
}
size[i] += b->bit_size[a];
}
} |
f94036f1 |
if (vs_total_ac_bits >= size[0] + size[1] + size[2] + size[3] + size[4]) |
6661b213 |
return; |
e15c3302 |
} |
d2d230a7 |
} while (qnos[0]|qnos[1]|qnos[2]|qnos[3]|qnos[4]);
|
f94036f1 |
for (a = 2; a == 2 || vs_total_ac_bits < size[0]; a += a){ |
d2d230a7 |
b = blks; |
f94036f1 |
size[0] = 5 * 6 * 4; //EOB
for (j = 0; j < 6 *5; j++, b++) {
prev = b->prev[0];
for (k = b->next[prev]; k < 64; k = b->next[k]) {
if (b->mb[k] < a && b->mb[k] > -a){ |
d2d230a7 |
b->next[prev] = b->next[k];
}else{
size[0] += dv_rl2vlc_size(k - prev - 1, b->mb[k]); |
f94036f1 |
prev = k; |
d2d230a7 |
}
}
}
} |
10acc479 |
}
|
7591b304 |
static int dv_encode_video_segment(AVCodecContext *avctx, void *arg) |
4fa1c4fa |
{ |
1ac1217b |
DVVideoContext *s = avctx->priv_data; |
7591b304 |
DVwork_chunk *work_chunk = arg; |
c3d470b4 |
int mb_index, i, j; |
77cd35cd |
int mb_x, mb_y, c_offset, linesize, y_stride; |
4fa1c4fa |
uint8_t* y_ptr; |
c3d470b4 |
uint8_t* dif; |
c75eca9d |
LOCAL_ALIGNED_8(uint8_t, scratch, [128]); |
b25d4392 |
EncBlockInfo enc_blks[5*DV_MAX_BPM];
PutBitContext pbs[5*DV_MAX_BPM]; |
115329f1 |
PutBitContext* pb; |
4fa1c4fa |
EncBlockInfo* enc_blk; |
e15c3302 |
int vs_bit_size = 0; |
b45ba151 |
int qnos[5] = {15, 15, 15, 15, 15}; /* No quantization */ |
85eca52b |
int* qnosp = &qnos[0]; |
115329f1 |
|
2ae7e124 |
dif = &s->buf[work_chunk->buf_offset*80]; |
10acc479 |
enc_blk = &enc_blks[0]; |
f94036f1 |
for (mb_index = 0; mb_index < 5; mb_index++) { |
c3d470b4 |
dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y); |
77cd35cd |
/* initializing luminance blocks */
if ((s->sys->pix_fmt == PIX_FMT_YUV420P) ||
(s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) ||
(s->sys->height >= 720 && mb_y != 134)) {
y_stride = s->picture.linesize[0] << 3;
} else {
y_stride = 16;
} |
f94036f1 |
y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + mb_x) << 3); |
77cd35cd |
linesize = s->picture.linesize[0];
if (s->sys->video_stype == 4) { /* SD 422 */
vs_bit_size +=
dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) +
dv_init_enc_block(enc_blk+1, NULL , linesize, s, 0) +
dv_init_enc_block(enc_blk+2, y_ptr + 8 , linesize, s, 0) +
dv_init_enc_block(enc_blk+3, NULL , linesize, s, 0);
} else {
vs_bit_size +=
dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) +
dv_init_enc_block(enc_blk+1, y_ptr + 8 , linesize, s, 0) +
dv_init_enc_block(enc_blk+2, y_ptr + y_stride, linesize, s, 0) +
dv_init_enc_block(enc_blk+3, y_ptr + 8 + y_stride, linesize, s, 0);
}
enc_blk += 4;
/* initializing chrominance blocks */ |
f94036f1 |
c_offset = (((mb_y >> (s->sys->pix_fmt == PIX_FMT_YUV420P)) * s->picture.linesize[1] +
(mb_x >> ((s->sys->pix_fmt == PIX_FMT_YUV411P) ? 2 : 1))) << 3); |
77cd35cd |
for (j = 2; j; j--) {
uint8_t *c_ptr = s->picture.data[j] + c_offset;
linesize = s->picture.linesize[j];
y_stride = (mb_y == 134) ? 8 : (s->picture.linesize[j] << 3); |
1a969d6d |
if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
uint8_t* d;
uint8_t* b = scratch;
for (i = 0; i < 8; i++) {
d = c_ptr + (linesize << 3);
b[0] = c_ptr[0]; b[1] = c_ptr[1]; b[2] = c_ptr[2]; b[3] = c_ptr[3];
b[4] = d[0]; b[5] = d[1]; b[6] = d[2]; b[7] = d[3];
c_ptr += linesize; |
c75eca9d |
b += 16; |
1a969d6d |
}
c_ptr = scratch; |
c75eca9d |
linesize = 16; |
1a969d6d |
} |
115329f1 |
|
77cd35cd |
vs_bit_size += dv_init_enc_block( enc_blk++, c_ptr , linesize, s, 1);
if (s->sys->bpm == 8) {
vs_bit_size += dv_init_enc_block(enc_blk++, c_ptr + y_stride, linesize, s, 1);
} |
4fa1c4fa |
}
}
|
e15c3302 |
if (vs_total_ac_bits < vs_bit_size) |
85eca52b |
dv_guess_qnos(&enc_blks[0], qnosp); |
4fa1c4fa |
|
85eca52b |
/* DIF encoding process */
for (j=0; j<5*s->sys->bpm;) {
int start_mb = j;
dif[3] = *qnosp++;
dif += 4; |
4fa1c4fa |
|
85eca52b |
/* First pass over individual cells only */
for (i=0; i<s->sys->bpm; i++, j++) {
int sz = s->sys->block_sizes[i]>>3;
init_put_bits(&pbs[j], dif, sz); |
b8df8d0d |
put_sbits(&pbs[j], 9, ((enc_blks[j].mb[0] >> 3) - 1024 + 2) >> 2); |
85eca52b |
put_bits(&pbs[j], 1, enc_blks[j].dct_mode);
put_bits(&pbs[j], 2, enc_blks[j].cno);
dv_encode_ac(&enc_blks[j], &pbs[j], &pbs[j+1]);
dif += sz;
} |
4fa1c4fa |
|
85eca52b |
/* Second pass over each MB space */
pb = &pbs[start_mb]; |
b25d4392 |
for (i=0; i<s->sys->bpm; i++) { |
85eca52b |
if (enc_blks[start_mb+i].partial_bit_count)
pb = dv_encode_ac(&enc_blks[start_mb+i], pb, &pbs[start_mb+s->sys->bpm]); |
c619ff6d |
} |
4fa1c4fa |
}
|
75f2c209 |
/* Third and final pass over the whole video segment space */ |
f94036f1 |
pb = &pbs[0]; |
b25d4392 |
for (j=0; j<5*s->sys->bpm; j++) { |
c619ff6d |
if (enc_blks[j].partial_bit_count) |
b25d4392 |
pb = dv_encode_ac(&enc_blks[j], pb, &pbs[s->sys->bpm*5]); |
fe78f7cd |
if (enc_blks[j].partial_bit_count) |
8f1e203a |
av_log(avctx, AV_LOG_ERROR, "ac bitstream overflow\n"); |
4fa1c4fa |
} |
e15c3302 |
|
ebb651d5 |
for (j=0; j<5*s->sys->bpm; j++) {
int pos;
int size = pbs[j].size_in_bits >> 3; |
e15c3302 |
flush_put_bits(&pbs[j]); |
ebb651d5 |
pos = put_bits_count(&pbs[j]) >> 3;
if (pos > size) {
av_log(avctx, AV_LOG_ERROR, "bitstream written beyond buffer size\n");
return -1;
}
memset(pbs[j].buf + pos, 0xff, size - pos);
} |
4fa1c4fa |
|
6faa4645 |
return 0;
}
|
f94036f1 |
static inline int dv_write_pack(enum dv_pack_type pack_id, DVVideoContext *c,
uint8_t* buf) |
3c8f30a7 |
{
/*
* Here's what SMPTE314M says about these two:
* (page 6) APTn, AP1n, AP2n, AP3n: These data shall be identical
* as track application IDs (APTn = 001, AP1n =
* 001, AP2n = 001, AP3n = 001), if the source signal
* comes from a digital VCR. If the signal source is
* unknown, all bits for these data shall be set to 1.
* (page 12) STYPE: STYPE defines a signal type of video signal
* 00000b = 4:1:1 compression
* 00100b = 4:2:2 compression
* XXXXXX = Reserved
* Now, I've got two problems with these statements:
* 1. it looks like APT == 111b should be a safe bet, but it isn't.
* It seems that for PAL as defined in IEC 61834 we have to set
* APT to 000 and for SMPTE314M to 001.
* 2. It is not at all clear what STYPE is used for 4:2:0 PAL
* compression scheme (if any).
*/ |
f94036f1 |
int apt = (c->sys->pix_fmt == PIX_FMT_YUV420P ? 0 : 1); |
3c8f30a7 |
uint8_t aspect = 0; |
f579d24b |
if ((int)(av_q2d(c->avctx->sample_aspect_ratio) * c->avctx->width / c->avctx->height * 10) >= 17) /* 16:9 */ |
3c8f30a7 |
aspect = 0x02;
buf[0] = (uint8_t)pack_id;
switch (pack_id) {
case dv_header525: /* I can't imagine why these two weren't defined as real */
case dv_header625: /* packs in SMPTE314M -- they definitely look like ones */ |
f94036f1 |
buf[1] = 0xf8 | /* reserved -- always 1 */
(apt & 0x07); /* APT: Track application ID */
buf[2] = (0 << 7) | /* TF1: audio data is 0 - valid; 1 - invalid */ |
3c8f30a7 |
(0x0f << 3) | /* reserved -- always 1 */
(apt & 0x07); /* AP1: Audio application ID */ |
f94036f1 |
buf[3] = (0 << 7) | /* TF2: video data is 0 - valid; 1 - invalid */ |
3c8f30a7 |
(0x0f << 3) | /* reserved -- always 1 */
(apt & 0x07); /* AP2: Video application ID */ |
f94036f1 |
buf[4] = (0 << 7) | /* TF3: subcode(SSYB) is 0 - valid; 1 - invalid */ |
3c8f30a7 |
(0x0f << 3) | /* reserved -- always 1 */
(apt & 0x07); /* AP3: Subcode application ID */
break;
case dv_video_source: |
f94036f1 |
buf[1] = 0xff; /* reserved -- always 1 */ |
3c8f30a7 |
buf[2] = (1 << 7) | /* B/W: 0 - b/w, 1 - color */
(1 << 6) | /* following CLF is valid - 0, invalid - 1 */ |
75f2c209 |
(3 << 4) | /* CLF: color frames ID (see ITU-R BT.470-4) */ |
f94036f1 |
0xf; /* reserved -- always 1 */ |
3c8f30a7 |
buf[3] = (3 << 6) | /* reserved -- always 1 */
(c->sys->dsf << 5) | /* system: 60fields/50fields */ |
f52901b3 |
c->sys->video_stype; /* signal type video compression */ |
f94036f1 |
buf[4] = 0xff; /* VISC: 0xff -- no information */ |
3c8f30a7 |
break;
case dv_video_control:
buf[1] = (0 << 6) | /* Copy generation management (CGMS) 0 -- free */ |
f94036f1 |
0x3f; /* reserved -- always 1 */
buf[2] = 0xc8 | /* reserved -- always b11001xxx */ |
3c8f30a7 |
aspect; |
75f2c209 |
buf[3] = (1 << 7) | /* frame/field flag 1 -- frame, 0 -- field */
(1 << 6) | /* first/second field flag 0 -- field 2, 1 -- field 1 */
(1 << 5) | /* frame change flag 0 -- same picture as before, 1 -- different */ |
3c8f30a7 |
(1 << 4) | /* 1 - interlaced, 0 - noninterlaced */ |
f94036f1 |
0xc; /* reserved -- always b1100 */
buf[4] = 0xff; /* reserved -- always 1 */ |
3c8f30a7 |
break;
default:
buf[1] = buf[2] = buf[3] = buf[4] = 0xff;
}
return 5;
}
|
b250f9c6 |
#if CONFIG_DVVIDEO_ENCODER |
89c9a8d3 |
static inline int dv_write_dif_id(enum dv_section_type t, uint8_t chan_num,
uint8_t seq_num, uint8_t dif_num,
uint8_t* buf)
{
buf[0] = (uint8_t)t; /* Section type */
buf[1] = (seq_num << 4) | /* DIF seq number 0-9 for 525/60; 0-11 for 625/50 */
(chan_num << 3) | /* FSC: for 50Mb/s 0 - first channel; 1 - second */
7; /* reserved -- always 1 */
buf[2] = dif_num; /* DIF block number Video: 0-134, Audio: 0-8 */
return 3;
}
static inline int dv_write_ssyb_id(uint8_t syb_num, uint8_t fr, uint8_t* buf)
{
if (syb_num == 0 || syb_num == 6) {
buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
(0 << 4) | /* AP3 (Subcode application ID) */
0x0f; /* reserved -- always 1 */
}
else if (syb_num == 11) {
buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
0x7f; /* reserved -- always 1 */
}
else {
buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
(0 << 4) | /* APT (Track application ID) */
0x0f; /* reserved -- always 1 */
}
buf[1] = 0xf0 | /* reserved -- always 1 */
(syb_num & 0x0f); /* SSYB number 0 - 11 */
buf[2] = 0xff; /* reserved -- always 1 */
return 3;
}
|
3c8f30a7 |
static void dv_format_frame(DVVideoContext* c, uint8_t* buf)
{
int chan, i, j, k;
for (chan = 0; chan < c->sys->n_difchan; chan++) {
for (i = 0; i < c->sys->difseg_size; i++) { |
75f2c209 |
memset(buf, 0xff, 80 * 6); /* first 6 DIF blocks are for control data */ |
3c8f30a7 |
/* DV header: 1DIF */
buf += dv_write_dif_id(dv_sect_header, chan, i, 0, buf);
buf += dv_write_pack((c->sys->dsf ? dv_header625 : dv_header525), c, buf);
buf += 72; /* unused bytes */
/* DV subcode: 2DIFs */
for (j = 0; j < 2; j++) {
buf += dv_write_dif_id(dv_sect_subcode, chan, i, j, buf);
for (k = 0; k < 6; k++)
buf += dv_write_ssyb_id(k, (i < c->sys->difseg_size/2), buf) + 5;
buf += 29; /* unused bytes */
}
/* DV VAUX: 3DIFS */
for (j = 0; j < 3; j++) {
buf += dv_write_dif_id(dv_sect_vaux, chan, i, j, buf);
buf += dv_write_pack(dv_video_source, c, buf);
buf += dv_write_pack(dv_video_control, c, buf);
buf += 7*5;
buf += dv_write_pack(dv_video_source, c, buf);
buf += dv_write_pack(dv_video_control, c, buf);
buf += 4*5 + 2; /* unused bytes */
}
/* DV Audio/Video: 135 Video DIFs + 9 Audio DIFs */
for (j = 0; j < 135; j++) {
if (j%15 == 0) {
memset(buf, 0xff, 80);
buf += dv_write_dif_id(dv_sect_audio, chan, i, j/15, buf);
buf += 77; /* audio control & shuffled PCM audio */
}
buf += dv_write_dif_id(dv_sect_video, chan, i, j, buf); |
910f02a0 |
buf += 77; /* 1 video macroblock: 1 bytes control |
3c8f30a7 |
4 * 14 bytes Y 8x8 data
10 bytes Cr 8x8 data
10 bytes Cb 8x8 data */
}
}
}
}
|
6a047213 |
static int dvvideo_encode_frame(AVCodecContext *c, AVPacket *pkt,
const AVFrame *frame, int *got_packet) |
5d2231ee |
{ |
6faa4645 |
DVVideoContext *s = c->priv_data; |
6a047213 |
int ret; |
4fa1c4fa |
|
242c73a0 |
s->sys = avpriv_dv_codec_profile(c); |
d724fe66 |
if (!s->sys || ff_dv_init_dynamic_tables(s->sys)) |
0ecca7a4 |
return -1; |
ae2c33b0 |
if ((ret = ff_alloc_packet2(c, pkt, s->sys->frame_size)) < 0) |
6a047213 |
return ret; |
0ecca7a4 |
|
f94036f1 |
c->pix_fmt = s->sys->pix_fmt; |
6a047213 |
s->picture = *frame; |
856170f7 |
s->picture.key_frame = 1; |
ce5e49b0 |
s->picture.pict_type = AV_PICTURE_TYPE_I; |
4fa1c4fa |
|
6a047213 |
s->buf = pkt->data; |
1ac1217b |
c->execute(c, dv_encode_video_segment, s->sys->work_chunks, NULL, |
2ae7e124 |
dv_work_pool_size(s->sys), sizeof(DVwork_chunk)); |
5d2231ee |
|
4fa1c4fa |
emms_c(); |
0b297700 |
|
6a047213 |
dv_format_frame(s, pkt->data); |
0b297700 |
|
6a047213 |
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0; |
4fa1c4fa |
} |
c842aa37 |
|
e7e2df27 |
AVCodec ff_dvvideo_encoder = { |
ec6402b7 |
.name = "dvvideo",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_DVVIDEO,
.priv_data_size = sizeof(DVVideoContext),
.init = dvvideo_init_encoder, |
6a047213 |
.encode2 = dvvideo_encode_frame, |
00c3b67b |
.capabilities = CODEC_CAP_SLICE_THREADS,
.pix_fmts = (const enum PixelFormat[]) {
PIX_FMT_YUV411P, PIX_FMT_YUV422P, PIX_FMT_YUV420P, PIX_FMT_NONE
},
.long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"), |
6faa4645 |
}; |
983ea0bc |
#endif // CONFIG_DVVIDEO_ENCODER |