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 };
-
- #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. 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_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->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; 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->picture.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;
- }
-
- #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",
- .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
- },
- };
- #endif // CONFIG_DVVIDEO_ENCODER
+
--- /dev/null
- * This file is part of Libav.
+ /*
+ * DV encoder
+ * Copyright (c) 2003 Roman Shaposhnik
+ *
- * Libav is free software; you can redistribute it and/or
++ * This file is part of FFmpeg.
+ *
- * Libav is distributed in the hope that it will be useful,
++ * 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.
+ *
- * License along with Libav; if not, write to the Free Software
++ * 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
- component is greater than 36. Libav's DV encoder tracks AC bit
++ * 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 "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);
+ }
++ 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 };
+
+ #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
-#else /* improved Libav method */
++ 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};
- assert((((int)blk) & 15) == 0);
++#else /* improved FFmpeg method */
+ static const int classes[] = {-1, -1, 255, 0xffff};
+ #endif
+ int max = classes[0];
+ int prev = 0;
+
- /* weight it and and shift down into range, adding for rounding */
++ 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_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;
- assert(b->next[prev] >= mb_area_start[a+1] || b->mb[prev]);
++ /* 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];
- assert(a2 < 4);
- assert(b->mb[b->next[k]]);
++ 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;
- assert(b->prev[a2] == k && (a2 + 1 >= 4 || b->prev[a2+1] != k));
++ 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]]);
- (1 << 6) | /* first/second field flag 0 -- field 2, 1 -- field 1 */
++ 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->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; 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->picture.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 */
- if ((ret = ff_alloc_packet(pkt, s->sys->frame_size)) < 0) {
- av_log(c, AV_LOG_ERROR, "Error getting output packet.\n");
++ 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;
+
+ 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",
+ .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
+ },
+ };
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