| /* |
| * 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/pixdesc.h" |
| #include "avcodec.h" |
| #include "dsputil.h" |
| #include "get_bits.h" |
| #include "internal.h" |
| #include "put_bits.h" |
| #include "simple_idct.h" |
| #include "dvdata.h" |
| #include "dv_tablegen.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 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; |
| } |
| } |
| } |
| |
| /* 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] = dv_vlc_bits[i]; |
| new_dv_vlc_len[j] = dv_vlc_len[i]; |
| new_dv_vlc_run[j] = dv_vlc_run[i]; |
| 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++; |
| 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]; |
| new_dv_vlc_level[j] = -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); |
| assert(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 */ |
| 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); |
| |
| avctx->coded_frame = &s->picture; |
| s->avctx = avctx; |
| avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; |
| |
| return 0; |
| } |
| |
| static av_cold int dvvideo_init_encoder(AVCodecContext *avctx) |
| { |
| if (!avpriv_dv_codec_profile(avctx)) { |
| av_log(avctx, AV_LOG_ERROR, "Found no DV profile for %ix%i %s video. " |
| "Valid DV profiles are:\n", |
| avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt)); |
| ff_dv_print_profiles(avctx, AV_LOG_ERROR); |
| return AVERROR(EINVAL); |
| } |
| if (avctx->height > 576) { |
| av_log(avctx, AV_LOG_ERROR, "DVCPRO HD encoding is not supported.\n"); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| dv_vlc_map_tableinit(); |
| |
| return ff_dvvideo_init(avctx); |
| } |
| |
| /* bit budget for AC only in 5 MBs */ |
| static const int vs_total_ac_bits = (100 * 4 + 68*2) * 5; |
| static const int mb_area_start[5] = { 1, 6, 21, 43, 64 }; |
| |
| static inline int put_bits_left(PutBitContext* s) |
| { |
| return (s->buf_end - s->buf) * 8 - put_bits_count(s); |
| } |
| |
| #if CONFIG_SMALL |
| /* Converts run and level (where level != 0) pair into VLC, returning bit size */ |
| static av_always_inline int dv_rl2vlc(int run, int level, int sign, uint32_t* vlc) |
| { |
| int size; |
| if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) { |
| *vlc = dv_vlc_map[run][level].vlc | sign; |
| size = dv_vlc_map[run][level].size; |
| } |
| else { |
| if (level < DV_VLC_MAP_LEV_SIZE) { |
| *vlc = dv_vlc_map[0][level].vlc | sign; |
| size = dv_vlc_map[0][level].size; |
| } else { |
| *vlc = 0xfe00 | (level << 1) | sign; |
| size = 16; |
| } |
| if (run) { |
| *vlc |= ((run < 16) ? dv_vlc_map[run-1][0].vlc : |
| (0x1f80 | (run - 1))) << size; |
| size += (run < 16) ? dv_vlc_map[run-1][0].size : 13; |
| } |
| } |
| |
| return size; |
| } |
| |
| static av_always_inline int dv_rl2vlc_size(int run, int level) |
| { |
| int size; |
| |
| if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) { |
| size = dv_vlc_map[run][level].size; |
| } |
| else { |
| 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; |
| } |
| } |
| return size; |
| } |
| #else |
| static av_always_inline int dv_rl2vlc(int run, int l, int sign, uint32_t* vlc) |
| { |
| *vlc = dv_vlc_map[run][l].vlc | sign; |
| return dv_vlc_map[run][l].size; |
| } |
| |
| static av_always_inline int dv_rl2vlc_size(int run, int l) |
| { |
| return dv_vlc_map[run][l].size; |
| } |
| #endif |
| |
| typedef struct EncBlockInfo { |
| 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; |
| uint32_t partial_bit_buffer; /* we can't use uint16_t here */ |
| } EncBlockInfo; |
| |
| static av_always_inline PutBitContext* dv_encode_ac(EncBlockInfo* bi, |
| PutBitContext* pb_pool, |
| PutBitContext* pb_end) |
| { |
| int prev, bits_left; |
| PutBitContext* pb = pb_pool; |
| int size = bi->partial_bit_count; |
| uint32_t vlc = bi->partial_bit_buffer; |
| |
| bi->partial_bit_count = bi->partial_bit_buffer = 0; |
| for (;;){ |
| /* Find suitable storage space */ |
| for (; size > (bits_left = put_bits_left(pb)); pb++) { |
| if (bits_left) { |
| size -= bits_left; |
| put_bits(pb, bits_left, vlc >> size); |
| vlc = vlc & ((1 << size) - 1); |
| } |
| if (pb + 1 >= pb_end) { |
| bi->partial_bit_count = size; |
| bi->partial_bit_buffer = vlc; |
| return pb; |
| } |
| } |
| |
| /* Store VLC */ |
| put_bits(pb, size, vlc); |
| |
| if (bi->cur_ac >= 64) |
| break; |
| |
| /* Construct the next VLC */ |
| prev = bi->cur_ac; |
| bi->cur_ac = bi->next[prev]; |
| if (bi->cur_ac < 64){ |
| size = dv_rl2vlc(bi->cur_ac - prev - 1, bi->mb[bi->cur_ac], bi->sign[bi->cur_ac], &vlc); |
| } else { |
| size = 4; vlc = 6; /* End Of Block stamp */ |
| } |
| } |
| return pb; |
| } |
| |
| 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); |
| return ps > is; |
| } |
| } |
| |
| return 0; |
| } |
| |
| 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, |
| }; |
| |
| static av_always_inline int dv_init_enc_block(EncBlockInfo* bi, uint8_t *data, int linesize, DVVideoContext *s, int bias) |
| { |
| const int *weight; |
| const uint8_t* zigzag_scan; |
| LOCAL_ALIGNED_16(DCTELEM, blk, [64]); |
| int i, area; |
| /* 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 |
| component is greater than 36. FFmpeg's DV encoder tracks AC bit |
| 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 */ |
| static const int classes[] = {12, 24, 36, 0xffff}; |
| #else /* improved FFmpeg method */ |
| static const int classes[] = {-1, -1, 255, 0xffff}; |
| #endif |
| int max = classes[0]; |
| int prev = 0; |
| |
| 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) { |
| bi->dct_mode = dv_guess_dct_mode(s, data, linesize); |
| 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. */ |
| memset(blk, 0, 64*sizeof(*blk)); |
| bi->dct_mode = 0; |
| } |
| bi->mb[0] = blk[0]; |
| |
| zigzag_scan = bi->dct_mode ? ff_zigzag248_direct : ff_zigzag_direct; |
| weight = bi->dct_mode ? dv_weight_248 : dv_weight_88; |
| |
| for (area = 0; area < 4; area++) { |
| bi->prev[area] = prev; |
| bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :) |
| for (i = mb_area_start[area]; i < mb_area_start[area+1]; i++) { |
| int level = blk[zigzag_scan[i]]; |
| |
| if (level + 15 > 30U) { |
| bi->sign[i] = (level >> 31) & 1; |
| /* weight it and and shift down into range, adding for rounding */ |
| /* the extra division by a factor of 2^4 reverses the 8x expansion of the DCT |
| AND the 2x doubling of the weights */ |
| level = (FFABS(level) * weight[i] + (1 << (dv_weight_bits+3))) >> (dv_weight_bits+4); |
| bi->mb[i] = level; |
| if (level > max) |
| max = level; |
| bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, level); |
| bi->next[prev]= i; |
| prev = i; |
| } |
| } |
| } |
| bi->next[prev]= i; |
| for (bi->cno = 0; max > classes[bi->cno]; bi->cno++); |
| |
| bi->cno += bias; |
| |
| if (bi->cno >= 3) { |
| bi->cno = 3; |
| prev = 0; |
| i = bi->next[prev]; |
| for (area = 0; area < 4; area++) { |
| bi->prev[area] = prev; |
| bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :) |
| for (; i < mb_area_start[area+1]; i = bi->next[i]) { |
| bi->mb[i] >>= 1; |
| |
| if (bi->mb[i]) { |
| bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, bi->mb[i]); |
| bi->next[prev]= i; |
| prev = i; |
| } |
| } |
| } |
| bi->next[prev]= i; |
| } |
| |
| return bi->bit_size[0] + bi->bit_size[1] + bi->bit_size[2] + bi->bit_size[3]; |
| } |
| |
| static inline void dv_guess_qnos(EncBlockInfo* blks, int* qnos) |
| { |
| int size[5]; |
| int i, j, k, a, prev, a2; |
| EncBlockInfo* b; |
| |
| size[0] = size[1] = size[2] = size[3] = size[4] = 1 << 24; |
| do { |
| b = blks; |
| for (i = 0; i < 5; i++) { |
| if (!qnos[i]) |
| continue; |
| |
| qnos[i]--; |
| size[i] = 0; |
| for (j = 0; j < 6; j++, b++) { |
| for (a = 0; a < 4; a++) { |
| if (b->area_q[a] != ff_dv_quant_shifts[qnos[i] + ff_dv_quant_offset[b->cno]][a]) { |
| b->bit_size[a] = 1; // 4 areas 4 bits for EOB :) |
| b->area_q[a]++; |
| prev = b->prev[a]; |
| assert(b->next[prev] >= mb_area_start[a+1] || b->mb[prev]); |
| for (k = b->next[prev] ; k < mb_area_start[a+1]; k = b->next[k]) { |
| b->mb[k] >>= 1; |
| if (b->mb[k]) { |
| b->bit_size[a] += dv_rl2vlc_size(k - prev - 1, b->mb[k]); |
| prev = k; |
| } else { |
| 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++) |
| b->prev[a2] = prev; |
| assert(a2 < 4); |
| 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]]); |
| assert(b->prev[a2] == k && (a2 + 1 >= 4 || b->prev[a2+1] != k)); |
| b->prev[a2] = prev; |
| } |
| b->next[prev] = b->next[k]; |
| } |
| } |
| b->prev[a+1]= prev; |
| } |
| size[i] += b->bit_size[a]; |
| } |
| } |
| if (vs_total_ac_bits >= size[0] + size[1] + size[2] + size[3] + size[4]) |
| return; |
| } |
| } while (qnos[0]|qnos[1]|qnos[2]|qnos[3]|qnos[4]); |
| |
| |
| for (a = 2; a == 2 || vs_total_ac_bits < size[0]; a += a){ |
| b = blks; |
| 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){ |
| b->next[prev] = b->next[k]; |
| }else{ |
| size[0] += dv_rl2vlc_size(k - prev - 1, b->mb[k]); |
| prev = k; |
| } |
| } |
| } |
| } |
| } |
| |
| static int dv_encode_video_segment(AVCodecContext *avctx, void *arg) |
| { |
| DVVideoContext *s = avctx->priv_data; |
| DVwork_chunk *work_chunk = arg; |
| int mb_index, i, j; |
| int mb_x, mb_y, c_offset, linesize, y_stride; |
| uint8_t* y_ptr; |
| uint8_t* dif; |
| LOCAL_ALIGNED_8(uint8_t, scratch, [128]); |
| EncBlockInfo enc_blks[5*DV_MAX_BPM]; |
| PutBitContext pbs[5*DV_MAX_BPM]; |
| PutBitContext* pb; |
| EncBlockInfo* enc_blk; |
| int vs_bit_size = 0; |
| int qnos[5] = {15, 15, 15, 15, 15}; /* No quantization */ |
| int* qnosp = &qnos[0]; |
| |
| dif = &s->buf[work_chunk->buf_offset*80]; |
| enc_blk = &enc_blks[0]; |
| for (mb_index = 0; mb_index < 5; mb_index++) { |
| dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y); |
| |
| /* 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; |
| } |
| y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + mb_x) << 3); |
| 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 */ |
| 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); |
| 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); |
| 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; |
| b += 16; |
| } |
| c_ptr = scratch; |
| linesize = 16; |
| } |
| |
| 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); |
| } |
| } |
| } |
| |
| if (vs_total_ac_bits < vs_bit_size) |
| dv_guess_qnos(&enc_blks[0], qnosp); |
| |
| /* DIF encoding process */ |
| for (j=0; j<5*s->sys->bpm;) { |
| int start_mb = j; |
| |
| dif[3] = *qnosp++; |
| dif += 4; |
| |
| /* 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); |
| put_sbits(&pbs[j], 9, ((enc_blks[j].mb[0] >> 3) - 1024 + 2) >> 2); |
| 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; |
| } |
| |
| /* Second pass over each MB space */ |
| pb = &pbs[start_mb]; |
| for (i=0; i<s->sys->bpm; i++) { |
| 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]); |
| } |
| } |
| |
| /* Third and final pass over the whole video segment space */ |
| pb = &pbs[0]; |
| for (j=0; j<5*s->sys->bpm; j++) { |
| if (enc_blks[j].partial_bit_count) |
| pb = dv_encode_ac(&enc_blks[j], pb, &pbs[s->sys->bpm*5]); |
| if (enc_blks[j].partial_bit_count) |
| av_log(avctx, AV_LOG_ERROR, "ac bitstream overflow\n"); |
| } |
| |
| for (j=0; j<5*s->sys->bpm; j++) { |
| int pos; |
| int size = pbs[j].size_in_bits >> 3; |
| flush_put_bits(&pbs[j]); |
| 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); |
| } |
| |
| return 0; |
| } |
| |
| static inline int dv_write_pack(enum dv_pack_type pack_id, DVVideoContext *c, |
| uint8_t* buf) |
| { |
| /* |
| * 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). |
| */ |
| int apt = (c->sys->pix_fmt == PIX_FMT_YUV420P ? 0 : 1); |
| |
| uint8_t aspect = 0; |
| if ((int)(av_q2d(c->avctx->sample_aspect_ratio) * c->avctx->width / c->avctx->height * 10) >= 17) /* 16:9 */ |
| 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 */ |
| buf[1] = 0xf8 | /* reserved -- always 1 */ |
| (apt & 0x07); /* APT: Track application ID */ |
| buf[2] = (0 << 7) | /* TF1: audio data is 0 - valid; 1 - invalid */ |
| (0x0f << 3) | /* reserved -- always 1 */ |
| (apt & 0x07); /* AP1: Audio application ID */ |
| buf[3] = (0 << 7) | /* TF2: video data is 0 - valid; 1 - invalid */ |
| (0x0f << 3) | /* reserved -- always 1 */ |
| (apt & 0x07); /* AP2: Video application ID */ |
| buf[4] = (0 << 7) | /* TF3: subcode(SSYB) is 0 - valid; 1 - invalid */ |
| (0x0f << 3) | /* reserved -- always 1 */ |
| (apt & 0x07); /* AP3: Subcode application ID */ |
| break; |
| case dv_video_source: |
| buf[1] = 0xff; /* reserved -- always 1 */ |
| buf[2] = (1 << 7) | /* B/W: 0 - b/w, 1 - color */ |
| (1 << 6) | /* following CLF is valid - 0, invalid - 1 */ |
| (3 << 4) | /* CLF: color frames ID (see ITU-R BT.470-4) */ |
| 0xf; /* reserved -- always 1 */ |
| buf[3] = (3 << 6) | /* reserved -- always 1 */ |
| (c->sys->dsf << 5) | /* system: 60fields/50fields */ |
| c->sys->video_stype; /* signal type video compression */ |
| buf[4] = 0xff; /* VISC: 0xff -- no information */ |
| break; |
| case dv_video_control: |
| buf[1] = (0 << 6) | /* Copy generation management (CGMS) 0 -- free */ |
| 0x3f; /* reserved -- always 1 */ |
| buf[2] = 0xc8 | /* reserved -- always b11001xxx */ |
| aspect; |
| 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 */ |
| (1 << 4) | /* 1 - interlaced, 0 - noninterlaced */ |
| 0xc; /* reserved -- always b1100 */ |
| buf[4] = 0xff; /* reserved -- always 1 */ |
| break; |
| default: |
| buf[1] = buf[2] = buf[3] = buf[4] = 0xff; |
| } |
| return 5; |
| } |
| |
| #if CONFIG_DVVIDEO_ENCODER |
| 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; |
| } |
| |
| 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++) { |
| memset(buf, 0xff, 80 * 6); /* first 6 DIF blocks are for control data */ |
| |
| /* 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); |
| buf += 77; /* 1 video macroblock: 1 bytes control |
| 4 * 14 bytes Y 8x8 data |
| 10 bytes Cr 8x8 data |
| 10 bytes Cb 8x8 data */ |
| } |
| } |
| } |
| } |
| |
| |
| static int dvvideo_encode_frame(AVCodecContext *c, AVPacket *pkt, |
| const AVFrame *frame, int *got_packet) |
| { |
| DVVideoContext *s = c->priv_data; |
| int ret; |
| |
| s->sys = avpriv_dv_codec_profile(c); |
| if (!s->sys || ff_dv_init_dynamic_tables(s->sys)) |
| return -1; |
| if ((ret = ff_alloc_packet2(c, pkt, s->sys->frame_size)) < 0) |
| return ret; |
| |
| c->pix_fmt = s->sys->pix_fmt; |
| s->picture = *frame; |
| s->picture.key_frame = 1; |
| s->picture.pict_type = AV_PICTURE_TYPE_I; |
| |
| s->buf = pkt->data; |
| c->execute(c, dv_encode_video_segment, s->sys->work_chunks, NULL, |
| dv_work_pool_size(s->sys), sizeof(DVwork_chunk)); |
| |
| emms_c(); |
| |
| dv_format_frame(s, pkt->data); |
| |
| pkt->flags |= AV_PKT_FLAG_KEY; |
| *got_packet = 1; |
| |
| return 0; |
| } |
| |
| AVCodec ff_dvvideo_encoder = { |
| .name = "dvvideo", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_DVVIDEO, |
| .priv_data_size = sizeof(DVVideoContext), |
| .init = dvvideo_init_encoder, |
| .encode2 = dvvideo_encode_frame, |
| .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)"), |
| }; |
| #endif // CONFIG_DVVIDEO_ENCODER |