From 97d19c2fec351093652b9eef8ef030227aec57df Mon Sep 17 00:00:00 2001 From: Diego Biurrun Date: Thu, 5 Apr 2012 16:58:43 +0200 Subject: dv: Split off DV video encoder into its own file --- libavcodec/dvenc.c | 698 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 698 insertions(+) create mode 100644 libavcodec/dvenc.c (limited to 'libavcodec/dvenc.c') diff --git a/libavcodec/dvenc.c b/libavcodec/dvenc.c new file mode 100644 index 0000000000..1e1fccfaa5 --- /dev/null +++ b/libavcodec/dvenc.c @@ -0,0 +1,698 @@ +/* + * DV encoder + * Copyright (c) 2003 Roman Shaposhnik + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * DV encoder + */ + +#include "libavutil/attributes.h" +#include "libavutil/pixdesc.h" +#include "config.h" +#include "avcodec.h" +#include "internal.h" +#include "put_bits.h" +#include "dv.h" +#include "dv_tablegen.h" + +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); + } + + 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 }; + +#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; + 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 = 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(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. Libav'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 Libav 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 == 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->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 == AV_PIX_FMT_YUV420P)) * s->picture.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->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 == 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; isys->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; isys->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); + + 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; +} + +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_packet(pkt, s->sys->frame_size)) < 0) { + av_log(c, AV_LOG_ERROR, "Error getting output packet.\n"); + 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", + .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_init_encoder, + .encode2 = dvvideo_encode_frame, + .capabilities = CODEC_CAP_SLICE_THREADS, + .pix_fmts = (const enum AVPixelFormat[]) { + AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE + }, +}; -- cgit v1.2.3