3 * Copyright (c) 2012-2018 Konstantin Shishkov
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "bytestream.h"
33 #include "clearvideodata.h"
35 typedef struct LevelCodes {
47 static const MV zero_mv = { 0 };
49 typedef struct MVInfo {
58 typedef struct TileInfo {
62 struct TileInfo *child[4];
65 typedef struct CLVContext {
66 AVCodecContext *avctx;
71 int mb_width, mb_height;
72 int pmb_width, pmb_height;
77 LevelCodes ylev[4], ulev[3], vlev[3];
78 int luma_dc_quant, chroma_dc_quant, ac_quant;
79 DECLARE_ALIGNED(16, int16_t, block)[64];
80 int top_dc[3], left_dc[4];
83 static inline int decode_block(CLVContext *ctx, int16_t *blk, int has_ac,
86 GetBitContext *gb = &ctx->gb;
87 int idx = 1, last = 0, val, skip;
89 memset(blk, 0, sizeof(*blk) * 64);
90 blk[0] = get_vlc2(gb, ctx->dc_vlc.table, 9, 3);
92 return AVERROR_INVALIDDATA;
98 while (idx < 64 && !last) {
99 val = get_vlc2(gb, ctx->ac_vlc.table, 9, 2);
101 return AVERROR_INVALIDDATA;
104 skip = (val >> 4) & 0xFF;
109 last = get_bits1(gb);
110 skip = get_bits(gb, 6);
111 val = get_sbits(gb, 8);
114 int aval = FFABS(val), sign = val < 0;
115 val = ac_quant * (2 * aval + 1);
123 return AVERROR_INVALIDDATA;
124 blk[ff_zigzag_direct[idx++]] = val;
127 return (idx <= 64 && last) ? 0 : -1;
130 #define DCT_TEMPLATE(blk, step, bias, shift, dshift, OP) \
131 const int t0 = OP(2841 * blk[1 * step] + 565 * blk[7 * step]); \
132 const int t1 = OP( 565 * blk[1 * step] - 2841 * blk[7 * step]); \
133 const int t2 = OP(1609 * blk[5 * step] + 2408 * blk[3 * step]); \
134 const int t3 = OP(2408 * blk[5 * step] - 1609 * blk[3 * step]); \
135 const int t4 = OP(1108 * blk[2 * step] - 2676 * blk[6 * step]); \
136 const int t5 = OP(2676 * blk[2 * step] + 1108 * blk[6 * step]); \
137 const int t6 = ((blk[0 * step] + blk[4 * step]) * (1 << dshift)) + bias; \
138 const int t7 = ((blk[0 * step] - blk[4 * step]) * (1 << dshift)) + bias; \
139 const int t8 = t0 + t2; \
140 const int t9 = t0 - t2; \
141 const int tA = (int)(181U * (t9 + (t1 - t3)) + 0x80) >> 8; \
142 const int tB = (int)(181U * (t9 - (t1 - t3)) + 0x80) >> 8; \
143 const int tC = t1 + t3; \
145 blk[0 * step] = (t6 + t5 + t8) >> shift; \
146 blk[1 * step] = (t7 + t4 + tA) >> shift; \
147 blk[2 * step] = (t7 - t4 + tB) >> shift; \
148 blk[3 * step] = (t6 - t5 + tC) >> shift; \
149 blk[4 * step] = (t6 - t5 - tC) >> shift; \
150 blk[5 * step] = (t7 - t4 - tB) >> shift; \
151 blk[6 * step] = (t7 + t4 - tA) >> shift; \
152 blk[7 * step] = (t6 + t5 - t8) >> shift; \
155 #define COP(x) (((x) + 4) >> 3)
157 static void clv_dct(int16_t *block)
163 for (i = 0; i < 8; i++) {
164 DCT_TEMPLATE(ptr, 1, 0x80, 8, 11, ROP);
169 for (i = 0; i < 8; i++) {
170 DCT_TEMPLATE(ptr, 8, 0x2000, 14, 8, COP);
175 static int decode_mb(CLVContext *c, int x, int y)
177 int i, has_ac[6], off;
179 for (i = 0; i < 6; i++)
180 has_ac[i] = get_bits1(&c->gb);
182 off = x * 16 + y * 16 * c->pic->linesize[0];
183 for (i = 0; i < 4; i++) {
184 if (decode_block(c, c->block, has_ac[i], c->ac_quant) < 0)
185 return AVERROR_INVALIDDATA;
186 if (!x && !(i & 1)) {
187 c->block[0] += c->top_dc[0];
188 c->top_dc[0] = c->block[0];
190 c->block[0] += c->left_dc[(i & 2) >> 1];
192 c->left_dc[(i & 2) >> 1] = c->block[0];
193 c->block[0] *= c->luma_dc_quant;
196 off += c->pic->linesize[0] * 8;
197 c->idsp.put_pixels_clamped(c->block,
198 c->pic->data[0] + off + (i & 1) * 8,
199 c->pic->linesize[0]);
202 off = x * 8 + y * 8 * c->pic->linesize[1];
203 for (i = 1; i < 3; i++) {
204 if (decode_block(c, c->block, has_ac[i + 3], c->ac_quant) < 0)
205 return AVERROR_INVALIDDATA;
207 c->block[0] += c->top_dc[i];
208 c->top_dc[i] = c->block[0];
210 c->block[0] += c->left_dc[i + 1];
212 c->left_dc[i + 1] = c->block[0];
213 c->block[0] *= c->chroma_dc_quant;
215 c->idsp.put_pixels_clamped(c->block, c->pic->data[i] + off,
216 c->pic->linesize[i]);
222 static int copy_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
223 int plane, int x, int y, int dx, int dy, int size)
225 int shift = plane > 0;
228 int sstride, dstride, soff, doff;
229 uint8_t *sbuf, *dbuf;
232 if (x < 0 || sx < 0 || y < 0 || sy < 0 ||
233 x + size > avctx->coded_width >> shift ||
234 y + size > avctx->coded_height >> shift ||
235 sx + size > avctx->coded_width >> shift ||
236 sy + size > avctx->coded_height >> shift)
237 return AVERROR_INVALIDDATA;
239 sstride = src->linesize[plane];
240 dstride = dst->linesize[plane];
241 soff = sx + sy * sstride;
242 sbuf = src->data[plane];
243 doff = x + y * dstride;
244 dbuf = dst->data[plane];
246 for (i = 0; i < size; i++) {
247 uint8_t *dptr = &dbuf[doff];
248 uint8_t *sptr = &sbuf[soff];
250 memcpy(dptr, sptr, size);
258 static int copyadd_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
259 int plane, int x, int y, int dx, int dy, int size, int bias)
261 int shift = plane > 0;
264 int sstride = src->linesize[plane];
265 int dstride = dst->linesize[plane];
266 int soff = sx + sy * sstride;
267 uint8_t *sbuf = src->data[plane];
268 int doff = x + y * dstride;
269 uint8_t *dbuf = dst->data[plane];
272 if (x < 0 || sx < 0 || y < 0 || sy < 0 ||
273 x + size > avctx->coded_width >> shift ||
274 y + size > avctx->coded_height >> shift ||
275 sx + size > avctx->coded_width >> shift ||
276 sy + size > avctx->coded_height >> shift)
277 return AVERROR_INVALIDDATA;
279 for (j = 0; j < size; j++) {
280 uint8_t *dptr = &dbuf[doff];
281 uint8_t *sptr = &sbuf[soff];
283 for (i = 0; i < size; i++) {
284 int val = sptr[i] + bias;
286 dptr[i] = av_clip_uint8(val);
296 static MV mvi_predict(MVInfo *mvi, int mb_x, int mb_y, MV diff)
299 int left_mv, right_mv, top_mv, bot_mv;
303 pred_mv = mvi->mv[mvi->mb_stride + mb_x - 1];
307 } else if ((mb_x == 0) || (mb_x == mvi->mb_w - 1)) {
308 pred_mv = mvi->mv[mb_x];
310 MV A = mvi->mv[mvi->mb_stride + mb_x - 1];
311 MV B = mvi->mv[ mb_x ];
312 MV C = mvi->mv[ mb_x + 1];
313 pred_mv.x = mid_pred(A.x, B.x, C.x);
314 pred_mv.y = mid_pred(A.y, B.y, C.y);
319 left_mv = -((mb_x * mvi->mb_size));
320 right_mv = ((mvi->mb_w - mb_x - 1) * mvi->mb_size);
321 if (res.x < left_mv) {
324 if (res.x > right_mv) {
327 top_mv = -((mb_y * mvi->mb_size));
328 bot_mv = ((mvi->mb_h - mb_y - 1) * mvi->mb_size);
329 if (res.y < top_mv) {
332 if (res.y > bot_mv) {
336 mvi->mv[mvi->mb_stride + mb_x].x = res.x + diff.x;
337 mvi->mv[mvi->mb_stride + mb_x].y = res.y + diff.y;
342 static void mvi_reset(MVInfo *mvi, int mb_w, int mb_h, int mb_size)
347 mvi->mb_size = mb_size;
348 mvi->mb_stride = mb_w;
349 memset(mvi->mv, 0, sizeof(MV) * mvi->mb_stride * 2);
352 static void mvi_update_row(MVInfo *mvi)
357 for (i = 0 ; i < mvi->mb_stride; i++) {
358 mvi->mv[i] = mvi->mv[mvi->mb_stride + i];
362 static TileInfo* decode_tile_info(GetBitContext *gb, LevelCodes *lc, int level)
369 if (lc[level].flags_cb.table) {
370 flags = get_vlc2(gb, lc[level].flags_cb.table, lc[level].flags_cb.bits, 2);
373 if (lc[level].mv_cb.table) {
374 uint16_t mv_code = get_vlc2(gb, lc[level].mv_cb.table, lc[level].mv_cb.bits, 3);
376 if (mv_code != lc[level].mv_esc) {
377 mv.x = (int8_t)(mv_code & 0xff);
378 mv.y = (int8_t)(mv_code >> 8);
380 mv.x = get_sbits(gb, 8);
381 mv.y = get_sbits(gb, 8);
385 if (lc[level].bias_cb.table) {
386 uint16_t bias_val = get_vlc2(gb, lc[level].bias_cb.table, lc[level].bias_cb.bits, 2);
388 if (bias_val != lc[level].bias_esc) {
389 bias = (int16_t)(bias_val);
391 bias = get_sbits(gb, 16);
395 ti = av_calloc(1, sizeof(*ti));
404 for (i = 0; i < 4; i++) {
405 if (ti->flags & (1 << i)) {
406 TileInfo *subti = decode_tile_info(gb, lc, level + 1);
407 ti->child[i] = subti;
415 static int tile_do_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
416 int plane, int x, int y, int dx, int dy, int size, int bias)
421 ret = copy_block(avctx, dst, src, plane, x, y, dx, dy, size);
423 ret = copyadd_block(avctx, dst, src, plane, x, y, dx, dy, size, bias);
429 static int restore_tree(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
430 int plane, int x, int y, int size,
431 TileInfo *tile, MV root_mv)
436 mv.x = root_mv.x + tile->mv.x;
437 mv.y = root_mv.y + tile->mv.y;
440 ret = tile_do_block(avctx, dst, src, plane, x, y, mv.x, mv.y, size, tile->bias);
442 int i, hsize = size >> 1;
444 for (i = 0; i < 4; i++) {
445 int xoff = (i & 2) == 0 ? 0 : hsize;
446 int yoff = (i & 1) == 0 ? 0 : hsize;
448 if (tile->child[i]) {
449 ret = restore_tree(avctx, dst, src, plane, x + xoff, y + yoff, hsize, tile->child[i], root_mv);
450 av_freep(&tile->child[i]);
452 ret = tile_do_block(avctx, dst, src, plane, x + xoff, y + yoff, mv.x, mv.y, hsize, tile->bias);
460 static void extend_edges(AVFrame *buf, int tile_size)
464 for (comp = 0; comp < 3; comp++) {
465 int shift = comp > 0;
466 int w = buf->width >> shift;
467 int h = buf->height >> shift;
468 int size = comp == 0 ? tile_size : tile_size >> 1;
469 int stride = buf->linesize[comp];
470 uint8_t *framebuf = buf->data[comp];
472 int right = size - (w & (size - 1));
473 int bottom = size - (h & (size - 1));
475 if ((right == size) && (bottom == size)) {
480 for (j = 0; j < h; j++) {
481 for (i = 0; i < right; i++) {
482 framebuf[off + i] = 0x80;
487 if (bottom != size) {
488 int off = h * stride;
489 for (j = 0; j < bottom; j++) {
490 for (i = 0; i < stride; i++) {
491 framebuf[off + i] = 0x80;
499 static int clv_decode_frame(AVCodecContext *avctx, void *data,
500 int *got_frame, AVPacket *avpkt)
502 const uint8_t *buf = avpkt->data;
503 int buf_size = avpkt->size;
504 CLVContext *c = avctx->priv_data;
510 bytestream2_init(&gb, buf, buf_size);
511 if (avctx->codec_tag == MKTAG('C', 'L', 'V', '1')) {
512 int skip = bytestream2_get_byte(&gb);
513 bytestream2_skip(&gb, (skip + 1) * 8);
516 frame_type = bytestream2_get_byte(&gb);
518 if ((frame_type & 0x7f) == 0x30) {
519 if ((ret = ff_reget_buffer(avctx, c->pic)) < 0)
522 c->pic->key_frame = 0;
523 c->pic->pict_type = AV_PICTURE_TYPE_P;
524 } else if (frame_type & 0x2) {
525 if (buf_size < c->mb_width * c->mb_height) {
526 av_log(avctx, AV_LOG_ERROR, "Packet too small\n");
527 return AVERROR_INVALIDDATA;
530 if ((ret = ff_reget_buffer(avctx, c->pic)) < 0)
533 c->pic->key_frame = 1;
534 c->pic->pict_type = AV_PICTURE_TYPE_I;
536 bytestream2_get_be32(&gb); // frame size;
537 c->ac_quant = bytestream2_get_byte(&gb);
538 c->luma_dc_quant = 32;
539 c->chroma_dc_quant = 32;
541 if ((ret = init_get_bits8(&c->gb, buf + bytestream2_tell(&gb),
542 buf_size - bytestream2_tell(&gb))) < 0)
545 for (i = 0; i < 3; i++)
547 for (i = 0; i < 4; i++)
550 for (j = 0; j < c->mb_height; j++) {
551 for (i = 0; i < c->mb_width; i++) {
552 ret = decode_mb(c, i, j);
557 extend_edges(c->pic, c->tile_size);
561 if ((ret = ff_reget_buffer(avctx, c->pic)) < 0)
564 ret = av_frame_copy(c->pic, c->prev);
568 if ((ret = init_get_bits8(&c->gb, buf + bytestream2_tell(&gb),
569 buf_size - bytestream2_tell(&gb))) < 0)
572 mvi_reset(&c->mvi, c->pmb_width, c->pmb_height, 1 << c->tile_shift);
574 for (j = 0; j < c->pmb_height; j++) {
575 for (i = 0; i < c->pmb_width; i++) {
576 if (get_bits1(&c->gb)) {
577 MV mv = mvi_predict(&c->mvi, i, j, zero_mv);
579 for (plane = 0; plane < 3; plane++) {
580 int16_t x = plane == 0 ? i << c->tile_shift : i << (c->tile_shift - 1);
581 int16_t y = plane == 0 ? j << c->tile_shift : j << (c->tile_shift - 1);
582 int16_t size = plane == 0 ? 1 << c->tile_shift : 1 << (c->tile_shift - 1);
583 int16_t mx = plane == 0 ? mv.x : mv.x / 2;
584 int16_t my = plane == 0 ? mv.y : mv.y / 2;
586 ret = copy_block(avctx, c->pic, c->prev, plane, x, y, mx, my, size);
591 int x = i << c->tile_shift;
592 int y = j << c->tile_shift;
593 int size = 1 << c->tile_shift;
597 tile = decode_tile_info(&c->gb, c->ylev, 0);
599 return AVERROR(ENOMEM);
600 mv = mvi_predict(&c->mvi, i, j, tile->mv);
601 ret = restore_tree(avctx, c->pic, c->prev, 0, x, y, size, tile, mv);
604 x = i << (c->tile_shift - 1);
605 y = j << (c->tile_shift - 1);
606 size = 1 << (c->tile_shift - 1);
607 cmv.x = mv.x + tile->mv.x;
608 cmv.y = mv.y + tile->mv.y;
612 tile = decode_tile_info(&c->gb, c->ulev, 0);
614 return AVERROR(ENOMEM);
615 ret = restore_tree(avctx, c->pic, c->prev, 1, x, y, size, tile, cmv);
619 tile = decode_tile_info(&c->gb, c->vlev, 0);
621 return AVERROR(ENOMEM);
622 ret = restore_tree(avctx, c->pic, c->prev, 2, x, y, size, tile, cmv);
628 mvi_update_row(&c->mvi);
630 extend_edges(c->pic, c->tile_size);
632 c->pic->key_frame = 0;
633 c->pic->pict_type = AV_PICTURE_TYPE_P;
636 if ((ret = av_frame_ref(data, c->pic)) < 0)
639 FFSWAP(AVFrame *, c->pic, c->prev);
643 return mb_ret < 0 ? mb_ret : buf_size;
646 static av_cold int clv_decode_init(AVCodecContext *avctx)
648 CLVContext *const c = avctx->priv_data;
651 if (avctx->extradata_size == 110) {
652 c->tile_size = AV_RL32(&avctx->extradata[94]);
653 } else if (avctx->extradata_size == 150) {
654 c->tile_size = AV_RB32(&avctx->extradata[134]);
656 av_log(avctx, AV_LOG_ERROR, "Unsupported extradata size: %d\n", avctx->extradata_size);
657 return AVERROR_INVALIDDATA;
660 c->tile_shift = av_log2(c->tile_size);
661 if (1 << c->tile_shift != c->tile_size) {
662 av_log(avctx, AV_LOG_ERROR, "Tile size: %d, is not power of 2.\n", c->tile_size);
663 return AVERROR_INVALIDDATA;
666 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
669 ret = ff_set_dimensions(avctx, FFALIGN(w, 1 << c->tile_shift), FFALIGN(h, 1 << c->tile_shift));
676 c->mb_width = FFALIGN(avctx->width, 16) >> 4;
677 c->mb_height = FFALIGN(avctx->height, 16) >> 4;
678 c->pmb_width = (w + c->tile_size - 1) >> c->tile_shift;
679 c->pmb_height = (h + c->tile_size - 1) >> c->tile_shift;
680 c->pic = av_frame_alloc();
681 c->prev = av_frame_alloc();
682 c->mvi.mv = av_calloc(c->pmb_width * 2, sizeof(*c->mvi.mv));
683 if (!c->pic || !c->prev || !c->mvi.mv)
684 return AVERROR(ENOMEM);
686 ff_idctdsp_init(&c->idsp, avctx);
687 ret = init_vlc(&c->dc_vlc, 9, NUM_DC_CODES,
689 clv_dc_codes, 1, 1, 0);
691 av_log(avctx, AV_LOG_ERROR, "Error initialising DC VLC\n");
694 ret = ff_init_vlc_sparse(&c->ac_vlc, 9, NUM_AC_CODES,
697 clv_ac_syms, 2, 2, 0);
699 av_log(avctx, AV_LOG_ERROR, "Error initialising AC VLC\n");
703 ret = init_vlc(&c->ylev[0].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsy_0_bits),
704 clv_flagsy_0_bits, 1, 1,
705 clv_flagsy_0_codes, 2, 2, 0);
709 ret = init_vlc(&c->ylev[1].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsy_1_bits),
710 clv_flagsy_1_bits, 1, 1,
711 clv_flagsy_1_codes, 2, 2, 0);
715 ret = init_vlc(&c->ylev[2].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsy_2_bits),
716 clv_flagsy_2_bits, 1, 1,
717 clv_flagsy_2_codes, 2, 2, 0);
721 ret = init_vlc(&c->ulev[0].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsu_0_bits),
722 clv_flagsu_0_bits, 1, 1,
723 clv_flagsu_0_codes, 2, 2, 0);
727 ret = init_vlc(&c->ulev[1].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsu_1_bits),
728 clv_flagsu_1_bits, 1, 1,
729 clv_flagsu_1_codes, 2, 2, 0);
733 ret = init_vlc(&c->vlev[0].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsv_0_bits),
734 clv_flagsv_0_bits, 1, 1,
735 clv_flagsv_0_codes, 2, 2, 0);
739 ret = init_vlc(&c->vlev[1].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsv_1_bits),
740 clv_flagsv_1_bits, 1, 1,
741 clv_flagsv_1_codes, 2, 2, 0);
745 ret = ff_init_vlc_sparse(&c->ylev[0].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvy_0_bits),
746 clv_mvy_0_bits, 1, 1,
747 clv_mvy_0_codes, 2, 2,
748 clv_mvy_0_syms, 2, 2, 0);
752 ret = ff_init_vlc_sparse(&c->ylev[1].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvy_1_bits),
753 clv_mvy_1_bits, 1, 1,
754 clv_mvy_1_codes, 2, 2,
755 clv_mvy_1_syms, 2, 2, 0);
759 ret = ff_init_vlc_sparse(&c->ylev[2].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvy_2_bits),
760 clv_mvy_2_bits, 1, 1,
761 clv_mvy_2_codes, 2, 2,
762 clv_mvy_2_syms, 2, 2, 0);
766 ret = ff_init_vlc_sparse(&c->ylev[3].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvy_3_bits),
767 clv_mvy_3_bits, 1, 1,
768 clv_mvy_3_codes, 2, 2,
769 clv_mvy_3_syms, 2, 2, 0);
773 ret = ff_init_vlc_sparse(&c->ulev[1].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvu_1_bits),
774 clv_mvu_1_bits, 1, 1,
775 clv_mvu_1_codes, 2, 2,
776 clv_mvu_1_syms, 2, 2, 0);
780 ret = ff_init_vlc_sparse(&c->ulev[2].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvu_2_bits),
781 clv_mvu_2_bits, 1, 1,
782 clv_mvu_2_codes, 2, 2,
783 clv_mvu_2_syms, 2, 2, 0);
787 ret = ff_init_vlc_sparse(&c->vlev[1].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvv_1_bits),
788 clv_mvv_1_bits, 1, 1,
789 clv_mvv_1_codes, 2, 2,
790 clv_mvv_1_syms, 2, 2, 0);
794 ret = ff_init_vlc_sparse(&c->vlev[2].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvv_2_bits),
795 clv_mvv_2_bits, 1, 1,
796 clv_mvv_2_codes, 2, 2,
797 clv_mvv_2_syms, 2, 2, 0);
801 ret = ff_init_vlc_sparse(&c->ylev[1].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasy_1_bits),
802 clv_biasy_1_bits, 1, 1,
803 clv_biasy_1_codes, 2, 2,
804 clv_biasy_1_syms, 2, 2, 0);
808 ret = ff_init_vlc_sparse(&c->ylev[2].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasy_2_bits),
809 clv_biasy_2_bits, 1, 1,
810 clv_biasy_2_codes, 2, 2,
811 clv_biasy_2_syms, 2, 2, 0);
815 ret = ff_init_vlc_sparse(&c->ylev[3].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasy_3_bits),
816 clv_biasy_3_bits, 1, 1,
817 clv_biasy_3_codes, 2, 2,
818 clv_biasy_3_syms, 2, 2, 0);
822 ret = ff_init_vlc_sparse(&c->ulev[1].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasu_1_bits),
823 clv_biasu_1_bits, 1, 1,
824 clv_biasu_1_codes, 2, 2,
825 clv_biasu_1_syms, 2, 2, 0);
829 ret = ff_init_vlc_sparse(&c->ulev[2].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasu_2_bits),
830 clv_biasu_2_bits, 1, 1,
831 clv_biasu_2_codes, 2, 2,
832 clv_biasu_2_syms, 2, 2, 0);
836 ret = ff_init_vlc_sparse(&c->vlev[1].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasv_1_bits),
837 clv_biasv_1_bits, 1, 1,
838 clv_biasv_1_codes, 2, 2,
839 clv_biasv_1_syms, 2, 2, 0);
843 ret = ff_init_vlc_sparse(&c->vlev[2].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasv_2_bits),
844 clv_biasv_2_bits, 1, 1,
845 clv_biasv_2_codes, 2, 2,
846 clv_biasv_2_syms, 2, 2, 0);
850 c->ylev[0].mv_esc = 0x0909;
851 c->ylev[1].mv_esc = 0x0A0A;
852 c->ylev[2].mv_esc = 0x1010;
853 c->ylev[3].mv_esc = 0x1313;
854 c->ulev[1].mv_esc = 0x0808;
855 c->ulev[2].mv_esc = 0x0B0B;
856 c->vlev[1].mv_esc = 0x0808;
857 c->vlev[2].mv_esc = 0x0B0B;
859 c->ylev[1].bias_esc = 0x100;
860 c->ylev[2].bias_esc = 0x100;
861 c->ylev[3].bias_esc = 0x100;
862 c->ulev[1].bias_esc = 0x100;
863 c->ulev[2].bias_esc = 0x100;
864 c->vlev[1].bias_esc = 0x100;
865 c->vlev[2].bias_esc = 0x100;
870 static av_cold int clv_decode_end(AVCodecContext *avctx)
872 CLVContext *const c = avctx->priv_data;
875 av_frame_free(&c->prev);
876 av_frame_free(&c->pic);
878 av_freep(&c->mvi.mv);
880 ff_free_vlc(&c->dc_vlc);
881 ff_free_vlc(&c->ac_vlc);
882 for (i = 0; i < 4; i++) {
883 ff_free_vlc(&c->ylev[i].mv_cb);
884 ff_free_vlc(&c->ylev[i].flags_cb);
885 ff_free_vlc(&c->ylev[i].bias_cb);
887 for (i = 0; i < 3; i++) {
888 ff_free_vlc(&c->ulev[i].mv_cb);
889 ff_free_vlc(&c->ulev[i].flags_cb);
890 ff_free_vlc(&c->ulev[i].bias_cb);
891 ff_free_vlc(&c->vlev[i].mv_cb);
892 ff_free_vlc(&c->vlev[i].flags_cb);
893 ff_free_vlc(&c->vlev[i].bias_cb);
899 AVCodec ff_clearvideo_decoder = {
900 .name = "clearvideo",
901 .long_name = NULL_IF_CONFIG_SMALL("Iterated Systems ClearVideo"),
902 .type = AVMEDIA_TYPE_VIDEO,
903 .id = AV_CODEC_ID_CLEARVIDEO,
904 .priv_data_size = sizeof(CLVContext),
905 .init = clv_decode_init,
906 .close = clv_decode_end,
907 .decode = clv_decode_frame,
908 .capabilities = AV_CODEC_CAP_DR1,
909 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,