| /* |
| * DV decoder |
| * Copyright (c) 2002 Fabrice Bellard |
| * Copyright (c) 2004 Roman Shaposhnik |
| * |
| * DV encoder |
| * Copyright (c) 2003 Roman Shaposhnik |
| * |
| * 50 Mbps (DVCPRO50) support |
| * Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com> |
| * |
| * 100 Mbps (DVCPRO HD) support |
| * Initial code by Daniel Maas <dmaas@maasdigital.com> (funded by BBC R&D) |
| * Final code by Roman Shaposhnik |
| * |
| * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth |
| * of DV technical info. |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * 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 |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * DV codec. |
| */ |
| |
| #include "libavutil/internal.h" |
| #include "libavutil/pixdesc.h" |
| #include "avcodec.h" |
| #include "get_bits.h" |
| #include "internal.h" |
| #include "put_bits.h" |
| #include "simple_idct.h" |
| #include "dvdata.h" |
| #include "dv.h" |
| |
| /* XXX: also include quantization */ |
| RL_VLC_ELEM ff_dv_rl_vlc[1184]; |
| |
| static inline void dv_calc_mb_coordinates(const DVprofile *d, int chan, int seq, int slot, |
| uint16_t *tbl) |
| { |
| 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 }; |
| |
| 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 }; |
| |
| static const uint8_t serpent1[] = {0, 1, 2, 2, 1, 0, |
| 0, 1, 2, 2, 1, 0, |
| 0, 1, 2, 2, 1, 0, |
| 0, 1, 2, 2, 1, 0, |
| 0, 1, 2}; |
| static const uint8_t serpent2[] = {0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0, |
| 0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0, |
| 0, 1, 2, 3, 4, 5}; |
| |
| static const uint8_t remap[][2] = {{ 0, 0}, { 0, 0}, { 0, 0}, { 0, 0}, /* dummy */ |
| { 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 AV_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 AV_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 AV_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; |
| } |
| } |
| } |
| |
| /* 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 }; |
| |
| int ff_dv_init_dynamic_tables(const DVprofile *d) |
| { |
| int j,i,c,s,p; |
| uint32_t *factor1, *factor2; |
| const int *iweight1, *iweight2; |
| |
| 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; |
| } |
| } |
| } |
| } |
| |
| 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) { |
| iweight1 = &ff_dv_iweight_720_y[0]; |
| iweight2 = &ff_dv_iweight_720_c[0]; |
| } else { |
| iweight1 = &ff_dv_iweight_1080_y[0]; |
| iweight2 = &ff_dv_iweight_1080_c[0]; |
| } |
| 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]; |
| } |
| } |
| } |
| } else { |
| iweight1 = &ff_dv_iweight_88[0]; |
| for (j = 0; j < 2; j++, iweight1 = &ff_dv_iweight_248[0]) { |
| for (s = 0; s < 22; s++) { |
| for (i = c = 0; c < 4; c++) { |
| for (; i < dv_quant_areas[c]; i++) { |
| *factor1 = iweight1[i] << (ff_dv_quant_shifts[s][c] + 1); |
| *factor2++ = (*factor1++) << 1; |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| av_cold int ff_dvvideo_init(AVCodecContext *avctx) |
| { |
| DVVideoContext *s = avctx->priv_data; |
| DSPContext dsp; |
| static int done = 0; |
| int i, j; |
| |
| if (!done) { |
| VLC dv_vlc; |
| uint16_t new_dv_vlc_bits[NB_DV_VLC*2]; |
| 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]; |
| |
| done = 1; |
| |
| /* it's faster to include sign bit in a generic VLC parsing scheme */ |
| for (i = 0, j = 0; i < NB_DV_VLC; i++, j++) { |
| new_dv_vlc_bits[j] = ff_dv_vlc_bits[i]; |
| new_dv_vlc_len[j] = ff_dv_vlc_len[i]; |
| new_dv_vlc_run[j] = ff_dv_vlc_run[i]; |
| new_dv_vlc_level[j] = ff_dv_vlc_level[i]; |
| |
| if (ff_dv_vlc_level[i]) { |
| new_dv_vlc_bits[j] <<= 1; |
| new_dv_vlc_len[j]++; |
| |
| j++; |
| new_dv_vlc_bits[j] = (ff_dv_vlc_bits[i] << 1) | 1; |
| new_dv_vlc_len[j] = ff_dv_vlc_len[i] + 1; |
| new_dv_vlc_run[j] = ff_dv_vlc_run[i]; |
| new_dv_vlc_level[j] = -ff_dv_vlc_level[i]; |
| } |
| } |
| |
| /* NOTE: as a trick, we use the fact the no codes are unused |
| to accelerate the parsing of partial codes */ |
| init_vlc(&dv_vlc, TEX_VLC_BITS, j, |
| new_dv_vlc_len, 1, 1, new_dv_vlc_bits, 2, 2, 0); |
| av_assert1(dv_vlc.table_size == 1184); |
| |
| for (i = 0; i < dv_vlc.table_size; i++){ |
| int code = dv_vlc.table[i][0]; |
| int len = dv_vlc.table[i][1]; |
| int level, run; |
| |
| if (len < 0){ //more bits needed |
| run = 0; |
| level = code; |
| } else { |
| run = new_dv_vlc_run [code] + 1; |
| level = new_dv_vlc_level[code]; |
| } |
| ff_dv_rl_vlc[i].len = len; |
| ff_dv_rl_vlc[i].level = level; |
| ff_dv_rl_vlc[i].run = run; |
| } |
| ff_free_vlc(&dv_vlc); |
| } |
| |
| /* Generic DSP setup */ |
| memset(&dsp,0, sizeof(dsp)); |
| ff_dsputil_init(&dsp, avctx); |
| ff_set_cmp(&dsp, dsp.ildct_cmp, avctx->ildct_cmp); |
| s->get_pixels = dsp.get_pixels; |
| s->ildct_cmp = dsp.ildct_cmp[5]; |
| |
| /* 88DCT setup */ |
| s->fdct[0] = dsp.fdct; |
| s->idct_put[0] = dsp.idct_put; |
| for (i = 0; i < 64; i++) |
| s->dv_zigzag[0][i] = dsp.idct_permutation[ff_zigzag_direct[i]]; |
| |
| /* 248DCT setup */ |
| s->fdct[1] = dsp.fdct248; |
| s->idct_put[1] = ff_simple_idct248_put; // FIXME: need to add it to DSP |
| 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); |
| |
| s->avctx = avctx; |
| avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; |
| |
| return 0; |
| } |
| |
