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);
96 while (idx < 64 && !last) {
97 val = get_vlc2(gb, ctx->ac_vlc.table, 9, 2);
99 return AVERROR_INVALIDDATA;
102 skip = (val >> 4) & 0xFF;
107 last = get_bits1(gb);
108 skip = get_bits(gb, 6);
109 val = get_sbits(gb, 8);
112 int aval = FFABS(val), sign = val < 0;
113 val = ac_quant * (2 * aval + 1);
121 return AVERROR_INVALIDDATA;
122 blk[ff_zigzag_direct[idx++]] = val;
125 return (idx <= 64 && last) ? 0 : -1;
128 #define DCT_TEMPLATE(blk, step, bias, shift, dshift, OP) \
129 const int t0 = OP(2841 * blk[1 * step] + 565 * blk[7 * step]); \
130 const int t1 = OP( 565 * blk[1 * step] - 2841 * blk[7 * step]); \
131 const int t2 = OP(1609 * blk[5 * step] + 2408 * blk[3 * step]); \
132 const int t3 = OP(2408 * blk[5 * step] - 1609 * blk[3 * step]); \
133 const int t4 = OP(1108 * blk[2 * step] - 2676 * blk[6 * step]); \
134 const int t5 = OP(2676 * blk[2 * step] + 1108 * blk[6 * step]); \
135 const int t6 = ((blk[0 * step] + blk[4 * step]) * (1 << dshift)) + bias; \
136 const int t7 = ((blk[0 * step] - blk[4 * step]) * (1 << dshift)) + bias; \
137 const int t8 = t0 + t2; \
138 const int t9 = t0 - t2; \
139 const int tA = (int)(181U * (t9 + (t1 - t3)) + 0x80) >> 8; \
140 const int tB = (int)(181U * (t9 - (t1 - t3)) + 0x80) >> 8; \
141 const int tC = t1 + t3; \
143 blk[0 * step] = (t6 + t5 + t8) >> shift; \
144 blk[1 * step] = (t7 + t4 + tA) >> shift; \
145 blk[2 * step] = (t7 - t4 + tB) >> shift; \
146 blk[3 * step] = (t6 - t5 + tC) >> shift; \
147 blk[4 * step] = (t6 - t5 - tC) >> shift; \
148 blk[5 * step] = (t7 - t4 - tB) >> shift; \
149 blk[6 * step] = (t7 + t4 - tA) >> shift; \
150 blk[7 * step] = (t6 + t5 - t8) >> shift; \
153 #define COP(x) (((x) + 4) >> 3)
155 static void clv_dct(int16_t *block)
161 for (i = 0; i < 8; i++) {
162 DCT_TEMPLATE(ptr, 1, 0x80, 8, 11, ROP);
167 for (i = 0; i < 8; i++) {
168 DCT_TEMPLATE(ptr, 8, 0x2000, 14, 8, COP);
173 static int decode_mb(CLVContext *c, int x, int y)
175 int i, has_ac[6], off;
177 for (i = 0; i < 6; i++)
178 has_ac[i] = get_bits1(&c->gb);
180 off = x * 16 + y * 16 * c->pic->linesize[0];
181 for (i = 0; i < 4; i++) {
182 if (decode_block(c, c->block, has_ac[i], c->ac_quant) < 0)
183 return AVERROR_INVALIDDATA;
184 if (!x && !(i & 1)) {
185 c->block[0] += c->top_dc[0];
186 c->top_dc[0] = c->block[0];
188 c->block[0] += c->left_dc[(i & 2) >> 1];
190 c->left_dc[(i & 2) >> 1] = c->block[0];
191 c->block[0] *= c->luma_dc_quant;
194 off += c->pic->linesize[0] * 8;
195 c->idsp.put_pixels_clamped(c->block,
196 c->pic->data[0] + off + (i & 1) * 8,
197 c->pic->linesize[0]);
200 off = x * 8 + y * 8 * c->pic->linesize[1];
201 for (i = 1; i < 3; i++) {
202 if (decode_block(c, c->block, has_ac[i + 3], c->ac_quant) < 0)
203 return AVERROR_INVALIDDATA;
205 c->block[0] += c->top_dc[i];
206 c->top_dc[i] = c->block[0];
208 c->block[0] += c->left_dc[i + 1];
210 c->left_dc[i + 1] = c->block[0];
211 c->block[0] *= c->chroma_dc_quant;
213 c->idsp.put_pixels_clamped(c->block, c->pic->data[i] + off,
214 c->pic->linesize[i]);
220 static int copy_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
221 int plane, int x, int y, int dx, int dy, int size)
223 int shift = plane > 0;
226 int sstride, dstride, soff, doff;
227 uint8_t *sbuf, *dbuf;
230 if (x < 0 || sx < 0 || y < 0 || sy < 0 ||
231 x + size > avctx->coded_width >> shift ||
232 y + size > avctx->coded_height >> shift ||
233 sx + size > avctx->coded_width >> shift ||
234 sy + size > avctx->coded_height >> shift)
235 return AVERROR_INVALIDDATA;
237 sstride = src->linesize[plane];
238 dstride = dst->linesize[plane];
239 soff = sx + sy * sstride;
240 sbuf = src->data[plane];
241 doff = x + y * dstride;
242 dbuf = dst->data[plane];
244 for (i = 0; i < size; i++) {
245 uint8_t *dptr = &dbuf[doff];
246 uint8_t *sptr = &sbuf[soff];
248 memcpy(dptr, sptr, size);
256 static int copyadd_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
257 int plane, int x, int y, int dx, int dy, int size, int bias)
259 int shift = plane > 0;
262 int sstride = src->linesize[plane];
263 int dstride = dst->linesize[plane];
264 int soff = sx + sy * sstride;
265 uint8_t *sbuf = src->data[plane];
266 int doff = x + y * dstride;
267 uint8_t *dbuf = dst->data[plane];
270 if (x < 0 || sx < 0 || y < 0 || sy < 0 ||
271 x + size > avctx->coded_width >> shift ||
272 y + size > avctx->coded_height >> shift ||
273 sx + size > avctx->coded_width >> shift ||
274 sy + size > avctx->coded_height >> shift)
275 return AVERROR_INVALIDDATA;
277 for (j = 0; j < size; j++) {
278 uint8_t *dptr = &dbuf[doff];
279 uint8_t *sptr = &sbuf[soff];
281 for (i = 0; i < size; i++) {
282 int val = sptr[i] + bias;
284 dptr[i] = av_clip_uint8(val);
294 static MV mvi_predict(MVInfo *mvi, int mb_x, int mb_y, MV diff)
297 int left_mv, right_mv, top_mv, bot_mv;
301 pred_mv = mvi->mv[mvi->mb_stride + mb_x - 1];
305 } else if ((mb_x == 0) || (mb_x == mvi->mb_w - 1)) {
306 pred_mv = mvi->mv[mb_x];
308 MV A = mvi->mv[mvi->mb_stride + mb_x - 1];
309 MV B = mvi->mv[ mb_x ];
310 MV C = mvi->mv[ mb_x + 1];
311 pred_mv.x = mid_pred(A.x, B.x, C.x);
312 pred_mv.y = mid_pred(A.y, B.y, C.y);
317 left_mv = -((mb_x * mvi->mb_size));
318 right_mv = ((mvi->mb_w - mb_x - 1) * mvi->mb_size);
319 if (res.x < left_mv) {
322 if (res.x > right_mv) {
325 top_mv = -((mb_y * mvi->mb_size));
326 bot_mv = ((mvi->mb_h - mb_y - 1) * mvi->mb_size);
327 if (res.y < top_mv) {
330 if (res.y > bot_mv) {
334 mvi->mv[mvi->mb_stride + mb_x].x = res.x + diff.x;
335 mvi->mv[mvi->mb_stride + mb_x].y = res.y + diff.y;
340 static void mvi_reset(MVInfo *mvi, int mb_w, int mb_h, int mb_size)
345 mvi->mb_size = mb_size;
346 mvi->mb_stride = mb_w;
347 memset(mvi->mv, 0, sizeof(MV) * mvi->mb_stride * 2);
350 static void mvi_update_row(MVInfo *mvi)
355 for (i = 0 ; i < mvi->mb_stride; i++) {
356 mvi->mv[i] = mvi->mv[mvi->mb_stride + i];
360 static TileInfo* decode_tile_info(GetBitContext *gb, LevelCodes *lc, int level)
367 if (lc[level].flags_cb.table) {
368 flags = get_vlc2(gb, lc[level].flags_cb.table, lc[level].flags_cb.bits, 2);
371 if (lc[level].mv_cb.table) {
372 uint16_t mv_code = get_vlc2(gb, lc[level].mv_cb.table, lc[level].mv_cb.bits, 3);
374 if (mv_code != lc[level].mv_esc) {
375 mv.x = (int8_t)(mv_code & 0xff);
376 mv.y = (int8_t)(mv_code >> 8);
378 mv.x = get_sbits(gb, 8);
379 mv.y = get_sbits(gb, 8);
383 if (lc[level].bias_cb.table) {
384 uint16_t bias_val = get_vlc2(gb, lc[level].bias_cb.table, lc[level].bias_cb.bits, 2);
386 if (bias_val != lc[level].bias_esc) {
387 bias = (int16_t)(bias_val);
389 bias = get_sbits(gb, 16);
393 ti = av_calloc(1, sizeof(*ti));
402 for (i = 0; i < 4; i++) {
403 if (ti->flags & (1 << i)) {
404 TileInfo *subti = decode_tile_info(gb, lc, level + 1);
405 ti->child[i] = subti;
413 static int tile_do_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
414 int plane, int x, int y, int dx, int dy, int size, int bias)
419 ret = copy_block(avctx, dst, src, plane, x, y, dx, dy, size);
421 ret = copyadd_block(avctx, dst, src, plane, x, y, dx, dy, size, bias);
427 static int restore_tree(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
428 int plane, int x, int y, int size,
429 TileInfo *tile, MV root_mv)
434 mv.x = root_mv.x + tile->mv.x;
435 mv.y = root_mv.y + tile->mv.y;
438 ret = tile_do_block(avctx, dst, src, plane, x, y, mv.x, mv.y, size, tile->bias);
440 int i, hsize = size >> 1;
442 for (i = 0; i < 4; i++) {
443 int xoff = (i & 2) == 0 ? 0 : hsize;
444 int yoff = (i & 1) == 0 ? 0 : hsize;
446 if (tile->child[i]) {
447 ret = restore_tree(avctx, dst, src, plane, x + xoff, y + yoff, hsize, tile->child[i], root_mv);
448 av_freep(&tile->child[i]);
450 ret = tile_do_block(avctx, dst, src, plane, x + xoff, y + yoff, mv.x, mv.y, hsize, tile->bias);
458 static void extend_edges(AVFrame *buf, int tile_size)
462 for (comp = 0; comp < 3; comp++) {
463 int shift = comp > 0;
464 int w = buf->width >> shift;
465 int h = buf->height >> shift;
466 int size = comp == 0 ? tile_size : tile_size >> 1;
467 int stride = buf->linesize[comp];
468 uint8_t *framebuf = buf->data[comp];
470 int right = size - (w & (size - 1));
471 int bottom = size - (h & (size - 1));
473 if ((right == size) && (bottom == size)) {
478 for (j = 0; j < h; j++) {
479 for (i = 0; i < right; i++) {
480 framebuf[off + i] = 0x80;
485 if (bottom != size) {
486 int off = h * stride;
487 for (j = 0; j < bottom; j++) {
488 for (i = 0; i < stride; i++) {
489 framebuf[off + i] = 0x80;
497 static int clv_decode_frame(AVCodecContext *avctx, void *data,
498 int *got_frame, AVPacket *avpkt)
500 const uint8_t *buf = avpkt->data;
501 int buf_size = avpkt->size;
502 CLVContext *c = avctx->priv_data;
508 bytestream2_init(&gb, buf, buf_size);
509 if (avctx->codec_tag == MKTAG('C', 'L', 'V', '1')) {
510 int skip = bytestream2_get_byte(&gb);
511 bytestream2_skip(&gb, (skip + 1) * 8);
514 frame_type = bytestream2_get_byte(&gb);
516 if ((frame_type & 0x7f) == 0x30) {
519 } else if (frame_type & 0x2) {
520 if (buf_size < c->mb_width * c->mb_height) {
521 av_log(avctx, AV_LOG_ERROR, "Packet too small\n");
522 return AVERROR_INVALIDDATA;
525 if ((ret = ff_reget_buffer(avctx, c->pic, 0)) < 0)
528 c->pic->key_frame = 1;
529 c->pic->pict_type = AV_PICTURE_TYPE_I;
531 bytestream2_get_be32(&gb); // frame size;
532 c->ac_quant = bytestream2_get_byte(&gb);
533 c->luma_dc_quant = 32;
534 c->chroma_dc_quant = 32;
536 if ((ret = init_get_bits8(&c->gb, buf + bytestream2_tell(&gb),
537 buf_size - bytestream2_tell(&gb))) < 0)
540 for (i = 0; i < 3; i++)
542 for (i = 0; i < 4; i++)
545 for (j = 0; j < c->mb_height; j++) {
546 for (i = 0; i < c->mb_width; i++) {
547 ret = decode_mb(c, i, j);
552 extend_edges(c->pic, c->tile_size);
556 if (c->pmb_width * c->pmb_height > 8LL*(buf_size - bytestream2_tell(&gb)))
557 return AVERROR_INVALIDDATA;
559 if ((ret = ff_reget_buffer(avctx, c->pic, 0)) < 0)
562 ret = av_frame_copy(c->pic, c->prev);
566 if ((ret = init_get_bits8(&c->gb, buf + bytestream2_tell(&gb),
567 buf_size - bytestream2_tell(&gb))) < 0)
570 mvi_reset(&c->mvi, c->pmb_width, c->pmb_height, 1 << c->tile_shift);
572 for (j = 0; j < c->pmb_height; j++) {
573 for (i = 0; i < c->pmb_width; i++) {
574 if (get_bits_left(&c->gb) <= 0)
575 return AVERROR_INVALIDDATA;
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 if (get_bits_left(&c->gb) < 0)
644 av_log(c->avctx, AV_LOG_WARNING, "overread %d\n", -get_bits_left(&c->gb));
646 return mb_ret < 0 ? mb_ret : buf_size;
649 static av_cold int clv_decode_init(AVCodecContext *avctx)
651 CLVContext *const c = avctx->priv_data;
654 if (avctx->extradata_size == 110) {
655 c->tile_size = AV_RL32(&avctx->extradata[94]);
656 } else if (avctx->extradata_size == 150) {
657 c->tile_size = AV_RB32(&avctx->extradata[134]);
658 } else if (!avctx->extradata_size) {
661 av_log(avctx, AV_LOG_ERROR, "Unsupported extradata size: %d\n", avctx->extradata_size);
662 return AVERROR_INVALIDDATA;
665 c->tile_shift = av_log2(c->tile_size);
666 if (1U << c->tile_shift != c->tile_size) {
667 av_log(avctx, AV_LOG_ERROR, "Tile size: %d, is not power of 2.\n", c->tile_size);
668 return AVERROR_INVALIDDATA;
671 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
674 ret = ff_set_dimensions(avctx, FFALIGN(w, 1 << c->tile_shift), FFALIGN(h, 1 << c->tile_shift));
681 c->mb_width = FFALIGN(avctx->width, 16) >> 4;
682 c->mb_height = FFALIGN(avctx->height, 16) >> 4;
683 c->pmb_width = (w + c->tile_size - 1) >> c->tile_shift;
684 c->pmb_height = (h + c->tile_size - 1) >> c->tile_shift;
685 c->pic = av_frame_alloc();
686 c->prev = av_frame_alloc();
687 c->mvi.mv = av_calloc(c->pmb_width * 2, sizeof(*c->mvi.mv));
688 if (!c->pic || !c->prev || !c->mvi.mv)
689 return AVERROR(ENOMEM);
691 ff_idctdsp_init(&c->idsp, avctx);
692 ret = init_vlc(&c->dc_vlc, 9, NUM_DC_CODES,
694 clv_dc_codes, 1, 1, 0);
696 av_log(avctx, AV_LOG_ERROR, "Error initialising DC VLC\n");
699 ret = ff_init_vlc_sparse(&c->ac_vlc, 9, NUM_AC_CODES,
702 clv_ac_syms, 2, 2, 0);
704 av_log(avctx, AV_LOG_ERROR, "Error initialising AC VLC\n");
708 ret = init_vlc(&c->ylev[0].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsy_0_bits),
709 clv_flagsy_0_bits, 1, 1,
710 clv_flagsy_0_codes, 2, 2, 0);
714 ret = init_vlc(&c->ylev[1].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsy_1_bits),
715 clv_flagsy_1_bits, 1, 1,
716 clv_flagsy_1_codes, 2, 2, 0);
720 ret = init_vlc(&c->ylev[2].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsy_2_bits),
721 clv_flagsy_2_bits, 1, 1,
722 clv_flagsy_2_codes, 2, 2, 0);
726 ret = init_vlc(&c->ulev[0].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsu_0_bits),
727 clv_flagsu_0_bits, 1, 1,
728 clv_flagsu_0_codes, 2, 2, 0);
732 ret = init_vlc(&c->ulev[1].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsu_1_bits),
733 clv_flagsu_1_bits, 1, 1,
734 clv_flagsu_1_codes, 2, 2, 0);
738 ret = init_vlc(&c->vlev[0].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsv_0_bits),
739 clv_flagsv_0_bits, 1, 1,
740 clv_flagsv_0_codes, 2, 2, 0);
744 ret = init_vlc(&c->vlev[1].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsv_1_bits),
745 clv_flagsv_1_bits, 1, 1,
746 clv_flagsv_1_codes, 2, 2, 0);
750 ret = ff_init_vlc_sparse(&c->ylev[0].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvy_0_bits),
751 clv_mvy_0_bits, 1, 1,
752 clv_mvy_0_codes, 2, 2,
753 clv_mvy_0_syms, 2, 2, 0);
757 ret = ff_init_vlc_sparse(&c->ylev[1].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvy_1_bits),
758 clv_mvy_1_bits, 1, 1,
759 clv_mvy_1_codes, 2, 2,
760 clv_mvy_1_syms, 2, 2, 0);
764 ret = ff_init_vlc_sparse(&c->ylev[2].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvy_2_bits),
765 clv_mvy_2_bits, 1, 1,
766 clv_mvy_2_codes, 2, 2,
767 clv_mvy_2_syms, 2, 2, 0);
771 ret = ff_init_vlc_sparse(&c->ylev[3].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvy_3_bits),
772 clv_mvy_3_bits, 1, 1,
773 clv_mvy_3_codes, 2, 2,
774 clv_mvy_3_syms, 2, 2, 0);
778 ret = ff_init_vlc_sparse(&c->ulev[1].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvu_1_bits),
779 clv_mvu_1_bits, 1, 1,
780 clv_mvu_1_codes, 2, 2,
781 clv_mvu_1_syms, 2, 2, 0);
785 ret = ff_init_vlc_sparse(&c->ulev[2].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvu_2_bits),
786 clv_mvu_2_bits, 1, 1,
787 clv_mvu_2_codes, 2, 2,
788 clv_mvu_2_syms, 2, 2, 0);
792 ret = ff_init_vlc_sparse(&c->vlev[1].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvv_1_bits),
793 clv_mvv_1_bits, 1, 1,
794 clv_mvv_1_codes, 2, 2,
795 clv_mvv_1_syms, 2, 2, 0);
799 ret = ff_init_vlc_sparse(&c->vlev[2].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvv_2_bits),
800 clv_mvv_2_bits, 1, 1,
801 clv_mvv_2_codes, 2, 2,
802 clv_mvv_2_syms, 2, 2, 0);
806 ret = ff_init_vlc_sparse(&c->ylev[1].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasy_1_bits),
807 clv_biasy_1_bits, 1, 1,
808 clv_biasy_1_codes, 2, 2,
809 clv_biasy_1_syms, 2, 2, 0);
813 ret = ff_init_vlc_sparse(&c->ylev[2].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasy_2_bits),
814 clv_biasy_2_bits, 1, 1,
815 clv_biasy_2_codes, 2, 2,
816 clv_biasy_2_syms, 2, 2, 0);
820 ret = ff_init_vlc_sparse(&c->ylev[3].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasy_3_bits),
821 clv_biasy_3_bits, 1, 1,
822 clv_biasy_3_codes, 2, 2,
823 clv_biasy_3_syms, 2, 2, 0);
827 ret = ff_init_vlc_sparse(&c->ulev[1].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasu_1_bits),
828 clv_biasu_1_bits, 1, 1,
829 clv_biasu_1_codes, 2, 2,
830 clv_biasu_1_syms, 2, 2, 0);
834 ret = ff_init_vlc_sparse(&c->ulev[2].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasu_2_bits),
835 clv_biasu_2_bits, 1, 1,
836 clv_biasu_2_codes, 2, 2,
837 clv_biasu_2_syms, 2, 2, 0);
841 ret = ff_init_vlc_sparse(&c->vlev[1].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasv_1_bits),
842 clv_biasv_1_bits, 1, 1,
843 clv_biasv_1_codes, 2, 2,
844 clv_biasv_1_syms, 2, 2, 0);
848 ret = ff_init_vlc_sparse(&c->vlev[2].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasv_2_bits),
849 clv_biasv_2_bits, 1, 1,
850 clv_biasv_2_codes, 2, 2,
851 clv_biasv_2_syms, 2, 2, 0);
855 c->ylev[0].mv_esc = 0x0909;
856 c->ylev[1].mv_esc = 0x0A0A;
857 c->ylev[2].mv_esc = 0x1010;
858 c->ylev[3].mv_esc = 0x1313;
859 c->ulev[1].mv_esc = 0x0808;
860 c->ulev[2].mv_esc = 0x0B0B;
861 c->vlev[1].mv_esc = 0x0808;
862 c->vlev[2].mv_esc = 0x0B0B;
864 c->ylev[1].bias_esc = 0x100;
865 c->ylev[2].bias_esc = 0x100;
866 c->ylev[3].bias_esc = 0x100;
867 c->ulev[1].bias_esc = 0x100;
868 c->ulev[2].bias_esc = 0x100;
869 c->vlev[1].bias_esc = 0x100;
870 c->vlev[2].bias_esc = 0x100;
875 static av_cold int clv_decode_end(AVCodecContext *avctx)
877 CLVContext *const c = avctx->priv_data;
880 av_frame_free(&c->prev);
881 av_frame_free(&c->pic);
883 av_freep(&c->mvi.mv);
885 ff_free_vlc(&c->dc_vlc);
886 ff_free_vlc(&c->ac_vlc);
887 for (i = 0; i < 4; i++) {
888 ff_free_vlc(&c->ylev[i].mv_cb);
889 ff_free_vlc(&c->ylev[i].flags_cb);
890 ff_free_vlc(&c->ylev[i].bias_cb);
892 for (i = 0; i < 3; i++) {
893 ff_free_vlc(&c->ulev[i].mv_cb);
894 ff_free_vlc(&c->ulev[i].flags_cb);
895 ff_free_vlc(&c->ulev[i].bias_cb);
896 ff_free_vlc(&c->vlev[i].mv_cb);
897 ff_free_vlc(&c->vlev[i].flags_cb);
898 ff_free_vlc(&c->vlev[i].bias_cb);
904 AVCodec ff_clearvideo_decoder = {
905 .name = "clearvideo",
906 .long_name = NULL_IF_CONFIG_SMALL("Iterated Systems ClearVideo"),
907 .type = AVMEDIA_TYPE_VIDEO,
908 .id = AV_CODEC_ID_CLEARVIDEO,
909 .priv_data_size = sizeof(CLVContext),
910 .init = clv_decode_init,
911 .close = clv_decode_end,
912 .decode = clv_decode_frame,
913 .capabilities = AV_CODEC_CAP_DR1,
914 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,