| /* |
| * DV encoder |
| * Copyright (c) 2003 Roman Shaposhnik |
| * |
| * 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 encoder |
| */ |
| |
| #include "config.h" |
| |
| #include "libavutil/attributes.h" |
| #include "libavutil/pixdesc.h" |
| |
| #include "avcodec.h" |
| #include "dv.h" |
| #include "dv_profile_internal.h" |
| #include "dv_tablegen.h" |
| #include "fdctdsp.h" |
| #include "internal.h" |
| #include "me_cmp.h" |
| #include "pixblockdsp.h" |
| #include "put_bits.h" |
| |
| static av_cold int dvvideo_encode_init(AVCodecContext *avctx) |
| { |
| DVVideoContext *s = avctx->priv_data; |
| FDCTDSPContext fdsp; |
| MECmpContext mecc; |
| PixblockDSPContext pdsp; |
| int ret; |
| |
| s->sys = av_dv_codec_profile2(avctx->width, avctx->height, avctx->pix_fmt, avctx->time_base); |
| if (!s->sys) { |
| 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; |
| } |
| ret = ff_dv_init_dynamic_tables(s, s->sys); |
| if (ret < 0) { |
| av_log(avctx, AV_LOG_ERROR, "Error initializing work tables.\n"); |
| return ret; |
| } |
| |
| dv_vlc_map_tableinit(); |
| |
| memset(&fdsp,0, sizeof(fdsp)); |
| memset(&mecc,0, sizeof(mecc)); |
| memset(&pdsp,0, sizeof(pdsp)); |
| ff_fdctdsp_init(&fdsp, avctx); |
| ff_me_cmp_init(&mecc, avctx); |
| ff_pixblockdsp_init(&pdsp, avctx); |
| ff_set_cmp(&mecc, mecc.ildct_cmp, avctx->ildct_cmp); |
| |
| s->get_pixels = pdsp.get_pixels; |
| s->ildct_cmp = mecc.ildct_cmp[5]; |
| |
| s->fdct[0] = fdsp.fdct; |
| s->fdct[1] = fdsp.fdct248; |
| |
| 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 }; |
| |
| #if CONFIG_SMALL |
| /* Convert 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; |
| int16_t 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 = av_mod_uintp2(vlc, size); |
| } |
| 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 & AV_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, 262144, 257107, 257107, 242189, 242189, 242189, 242189, |
| 237536, 237536, 229376, 229376, 200636, 200636, 224973, 224973, |
| 223754, 223754, 235923, 235923, 229376, 229376, 217965, 217965, |
| 211916, 211916, 196781, 196781, 185364, 185364, 206433, 206433, |
| 211916, 211916, 222935, 222935, 200636, 200636, 205964, 205964, |
| 200704, 200704, 180568, 180568, 175557, 175557, 195068, 195068, |
| 185364, 185364, 188995, 188995, 174606, 174606, 175557, 175557, |
| 170627, 170627, 153560, 153560, 165371, 165371, 144651, 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(int16_t, 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; |
| |
| av_assert2((((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_dv_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 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]; |
| av_assert2(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; |
| av_assert2(a2 < 4); |
| av_assert2(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]]); |
| av_assert2(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 == AV_PIX_FMT_YUV420P) || |
| (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) || |
| (s->sys->height >= 720 && mb_y != 134)) { |
| y_stride = s->frame->linesize[0] << 3; |
| } else { |
| y_stride = 16; |
| } |
| y_ptr = s->frame->data[0] + |
| ((mb_y * s->frame->linesize[0] + mb_x) << 3); |
| linesize = s->frame->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 == AV_PIX_FMT_YUV420P)) * s->frame->linesize[1] + |
| (mb_x >> ((s->sys->pix_fmt == AV_PIX_FMT_YUV411P) ? 2 : 1))) << 3); |
| for (j = 2; j; j--) { |
| uint8_t *c_ptr = s->frame->data[j] + c_offset; |
| linesize = s->frame->linesize[j]; |
| y_stride = (mb_y == 134) ? 8 : (s->frame->linesize[j] << 3); |
| if (s->sys->pix_fmt == AV_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 == AV_PIX_FMT_YUV420P ? 0 : 1); |
| int fs = c->frame->top_field_first ? 0x00 : 0x40; |
| |
| 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 */ |
| fs | /* 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; |
| } |
| |
| 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; |
| |
| if ((ret = ff_alloc_packet2(c, pkt, s->sys->frame_size, 0)) < 0) |
| return ret; |
| |
| c->pix_fmt = s->sys->pix_fmt; |
| s->frame = frame; |
| #if FF_API_CODED_FRAME |
| FF_DISABLE_DEPRECATION_WARNINGS |
| c->coded_frame->key_frame = 1; |
| c->coded_frame->pict_type = AV_PICTURE_TYPE_I; |
| FF_ENABLE_DEPRECATION_WARNINGS |
| #endif |
| |
| s->buf = pkt->data; |
| c->execute(c, dv_encode_video_segment, s->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", |
| .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_DVVIDEO, |
| .priv_data_size = sizeof(DVVideoContext), |
| .init = dvvideo_encode_init, |
| .encode2 = dvvideo_encode_frame, |
| .capabilities = AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_INTRA_ONLY, |
| .pix_fmts = (const enum AVPixelFormat[]) { |
| AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV422P, |
| AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE |
| }, |
| }; |
