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830be99ae1
* qatar/master: dv: Split off DV video encoder into its own file Conflicts: libavcodec/dv.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
331 lines
11 KiB
C
331 lines
11 KiB
C
/*
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* DV decoder
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* Copyright (c) 2002 Fabrice Bellard
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* Copyright (c) 2004 Roman Shaposhnik
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*
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* DV encoder
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* Copyright (c) 2003 Roman Shaposhnik
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*
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* 50 Mbps (DVCPRO50) support
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* Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com>
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*
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* 100 Mbps (DVCPRO HD) support
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* Initial code by Daniel Maas <dmaas@maasdigital.com> (funded by BBC R&D)
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* Final code by Roman Shaposhnik
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*
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* Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
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* of DV technical info.
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* DV codec.
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*/
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#include "libavutil/internal.h"
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#include "libavutil/pixdesc.h"
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#include "avcodec.h"
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#include "get_bits.h"
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#include "internal.h"
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#include "put_bits.h"
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#include "simple_idct.h"
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#include "dvdata.h"
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#include "dv.h"
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/* XXX: also include quantization */
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RL_VLC_ELEM ff_dv_rl_vlc[1184];
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static inline void dv_calc_mb_coordinates(const DVprofile *d, int chan, int seq, int slot,
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uint16_t *tbl)
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{
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static const uint8_t off[] = { 2, 6, 8, 0, 4 };
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static const uint8_t shuf1[] = { 36, 18, 54, 0, 72 };
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static const uint8_t shuf2[] = { 24, 12, 36, 0, 48 };
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static const uint8_t shuf3[] = { 18, 9, 27, 0, 36 };
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static const uint8_t l_start[] = {0, 4, 9, 13, 18, 22, 27, 31, 36, 40};
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static const uint8_t l_start_shuffled[] = { 9, 4, 13, 0, 18 };
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static const uint8_t serpent1[] = {0, 1, 2, 2, 1, 0,
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0, 1, 2, 2, 1, 0,
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0, 1, 2, 2, 1, 0,
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0, 1, 2, 2, 1, 0,
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0, 1, 2};
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static const uint8_t serpent2[] = {0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0,
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0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0,
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0, 1, 2, 3, 4, 5};
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static const uint8_t remap[][2] = {{ 0, 0}, { 0, 0}, { 0, 0}, { 0, 0}, /* dummy */
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{ 0, 0}, { 0, 1}, { 0, 2}, { 0, 3}, {10, 0},
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{10, 1}, {10, 2}, {10, 3}, {20, 0}, {20, 1},
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{20, 2}, {20, 3}, {30, 0}, {30, 1}, {30, 2},
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{30, 3}, {40, 0}, {40, 1}, {40, 2}, {40, 3},
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{50, 0}, {50, 1}, {50, 2}, {50, 3}, {60, 0},
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{60, 1}, {60, 2}, {60, 3}, {70, 0}, {70, 1},
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{70, 2}, {70, 3}, { 0,64}, { 0,65}, { 0,66},
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{10,64}, {10,65}, {10,66}, {20,64}, {20,65},
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{20,66}, {30,64}, {30,65}, {30,66}, {40,64},
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{40,65}, {40,66}, {50,64}, {50,65}, {50,66},
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{60,64}, {60,65}, {60,66}, {70,64}, {70,65},
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{70,66}, { 0,67}, {20,67}, {40,67}, {60,67}};
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int i, k, m;
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int x, y, blk;
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for (m=0; m<5; m++) {
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switch (d->width) {
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case 1440:
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blk = (chan*11+seq)*27+slot;
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if (chan == 0 && seq == 11) {
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x = m*27+slot;
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if (x<90) {
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y = 0;
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} else {
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x = (x - 90)*2;
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y = 67;
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}
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} else {
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i = (4*chan + blk + off[m])%11;
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k = (blk/11)%27;
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x = shuf1[m] + (chan&1)*9 + k%9;
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y = (i*3+k/9)*2 + (chan>>1) + 1;
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}
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tbl[m] = (x<<1)|(y<<9);
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break;
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case 1280:
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blk = (chan*10+seq)*27+slot;
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i = (4*chan + (seq/5) + 2*blk + off[m])%10;
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k = (blk/5)%27;
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x = shuf1[m]+(chan&1)*9 + k%9;
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y = (i*3+k/9)*2 + (chan>>1) + 4;
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if (x >= 80) {
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x = remap[y][0]+((x-80)<<(y>59));
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y = remap[y][1];
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}
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tbl[m] = (x<<1)|(y<<9);
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break;
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case 960:
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blk = (chan*10+seq)*27+slot;
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i = (4*chan + (seq/5) + 2*blk + off[m])%10;
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k = (blk/5)%27 + (i&1)*3;
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x = shuf2[m] + k%6 + 6*(chan&1);
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y = l_start[i] + k/6 + 45*(chan>>1);
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tbl[m] = (x<<1)|(y<<9);
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break;
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case 720:
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switch (d->pix_fmt) {
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case AV_PIX_FMT_YUV422P:
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x = shuf3[m] + slot/3;
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y = serpent1[slot] +
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((((seq + off[m]) % d->difseg_size)<<1) + chan)*3;
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tbl[m] = (x<<1)|(y<<8);
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break;
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case AV_PIX_FMT_YUV420P:
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x = shuf3[m] + slot/3;
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y = serpent1[slot] +
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((seq + off[m]) % d->difseg_size)*3;
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tbl[m] = (x<<1)|(y<<9);
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break;
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case AV_PIX_FMT_YUV411P:
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i = (seq + off[m]) % d->difseg_size;
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k = slot + ((m==1||m==2)?3:0);
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x = l_start_shuffled[m] + k/6;
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y = serpent2[k] + i*6;
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if (x>21)
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y = y*2 - i*6;
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tbl[m] = (x<<2)|(y<<8);
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break;
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}
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default:
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break;
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}
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}
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}
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/* quantization quanta by QNO for DV100 */
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static const uint8_t dv100_qstep[16] = {
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1, /* QNO = 0 and 1 both have no quantization */
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1,
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2, 3, 4, 5, 6, 7, 8, 16, 18, 20, 22, 24, 28, 52
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};
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static const uint8_t dv_quant_areas[4] = { 6, 21, 43, 64 };
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int ff_dv_init_dynamic_tables(const DVprofile *d)
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{
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int j,i,c,s,p;
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uint32_t *factor1, *factor2;
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const int *iweight1, *iweight2;
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if (!d->work_chunks[dv_work_pool_size(d)-1].buf_offset) {
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p = i = 0;
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for (c=0; c<d->n_difchan; c++) {
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for (s=0; s<d->difseg_size; s++) {
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p += 6;
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for (j=0; j<27; j++) {
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p += !(j%3);
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if (!(DV_PROFILE_IS_1080i50(d) && c != 0 && s == 11) &&
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!(DV_PROFILE_IS_720p50(d) && s > 9)) {
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dv_calc_mb_coordinates(d, c, s, j, &d->work_chunks[i].mb_coordinates[0]);
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d->work_chunks[i++].buf_offset = p;
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}
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p += 5;
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}
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}
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}
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}
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if (!d->idct_factor[DV_PROFILE_IS_HD(d)?8191:5631]) {
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factor1 = &d->idct_factor[0];
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factor2 = &d->idct_factor[DV_PROFILE_IS_HD(d)?4096:2816];
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if (d->height == 720) {
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iweight1 = &ff_dv_iweight_720_y[0];
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iweight2 = &ff_dv_iweight_720_c[0];
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} else {
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iweight1 = &ff_dv_iweight_1080_y[0];
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iweight2 = &ff_dv_iweight_1080_c[0];
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}
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if (DV_PROFILE_IS_HD(d)) {
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for (c = 0; c < 4; c++) {
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for (s = 0; s < 16; s++) {
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for (i = 0; i < 64; i++) {
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*factor1++ = (dv100_qstep[s] << (c + 9)) * iweight1[i];
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*factor2++ = (dv100_qstep[s] << (c + 9)) * iweight2[i];
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}
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}
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}
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} else {
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iweight1 = &ff_dv_iweight_88[0];
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for (j = 0; j < 2; j++, iweight1 = &ff_dv_iweight_248[0]) {
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for (s = 0; s < 22; s++) {
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for (i = c = 0; c < 4; c++) {
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for (; i < dv_quant_areas[c]; i++) {
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*factor1 = iweight1[i] << (ff_dv_quant_shifts[s][c] + 1);
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*factor2++ = (*factor1++) << 1;
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}
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}
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}
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}
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}
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}
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return 0;
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}
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av_cold int ff_dvvideo_init(AVCodecContext *avctx)
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{
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DVVideoContext *s = avctx->priv_data;
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DSPContext dsp;
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static int done = 0;
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int i, j;
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if (!done) {
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VLC dv_vlc;
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uint16_t new_dv_vlc_bits[NB_DV_VLC*2];
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uint8_t new_dv_vlc_len[NB_DV_VLC*2];
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uint8_t new_dv_vlc_run[NB_DV_VLC*2];
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int16_t new_dv_vlc_level[NB_DV_VLC*2];
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done = 1;
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/* it's faster to include sign bit in a generic VLC parsing scheme */
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for (i = 0, j = 0; i < NB_DV_VLC; i++, j++) {
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new_dv_vlc_bits[j] = ff_dv_vlc_bits[i];
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new_dv_vlc_len[j] = ff_dv_vlc_len[i];
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new_dv_vlc_run[j] = ff_dv_vlc_run[i];
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new_dv_vlc_level[j] = ff_dv_vlc_level[i];
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if (ff_dv_vlc_level[i]) {
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new_dv_vlc_bits[j] <<= 1;
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new_dv_vlc_len[j]++;
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j++;
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new_dv_vlc_bits[j] = (ff_dv_vlc_bits[i] << 1) | 1;
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new_dv_vlc_len[j] = ff_dv_vlc_len[i] + 1;
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new_dv_vlc_run[j] = ff_dv_vlc_run[i];
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new_dv_vlc_level[j] = -ff_dv_vlc_level[i];
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}
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}
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/* NOTE: as a trick, we use the fact the no codes are unused
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to accelerate the parsing of partial codes */
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init_vlc(&dv_vlc, TEX_VLC_BITS, j,
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new_dv_vlc_len, 1, 1, new_dv_vlc_bits, 2, 2, 0);
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av_assert1(dv_vlc.table_size == 1184);
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for (i = 0; i < dv_vlc.table_size; i++){
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int code = dv_vlc.table[i][0];
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int len = dv_vlc.table[i][1];
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int level, run;
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if (len < 0){ //more bits needed
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run = 0;
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level = code;
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} else {
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run = new_dv_vlc_run [code] + 1;
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level = new_dv_vlc_level[code];
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}
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ff_dv_rl_vlc[i].len = len;
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ff_dv_rl_vlc[i].level = level;
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ff_dv_rl_vlc[i].run = run;
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}
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ff_free_vlc(&dv_vlc);
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}
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/* Generic DSP setup */
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memset(&dsp,0, sizeof(dsp));
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ff_dsputil_init(&dsp, avctx);
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ff_set_cmp(&dsp, dsp.ildct_cmp, avctx->ildct_cmp);
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s->get_pixels = dsp.get_pixels;
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s->ildct_cmp = dsp.ildct_cmp[5];
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/* 88DCT setup */
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s->fdct[0] = dsp.fdct;
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s->idct_put[0] = dsp.idct_put;
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for (i = 0; i < 64; i++)
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s->dv_zigzag[0][i] = dsp.idct_permutation[ff_zigzag_direct[i]];
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/* 248DCT setup */
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s->fdct[1] = dsp.fdct248;
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s->idct_put[1] = ff_simple_idct248_put; // FIXME: need to add it to DSP
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if (avctx->lowres){
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for (i = 0; i < 64; i++){
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int j = ff_zigzag248_direct[i];
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s->dv_zigzag[1][i] = dsp.idct_permutation[(j & 7) + (j & 8) * 4 + (j & 48) / 2];
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}
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}else
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memcpy(s->dv_zigzag[1], ff_zigzag248_direct, 64);
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avcodec_get_frame_defaults(&s->picture);
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avctx->coded_frame = &s->picture;
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s->avctx = avctx;
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avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT;
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return 0;
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}
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