3 * ported to MPlayer by Arpi <arpi@thot.banki.hu>
4 * ported to libavcodec by Nick Kurshev <nickols_k@mail.ru>
6 * Copyright (C) 2002 the xine project
7 * Copyright (C) 2002 the ffmpeg project
9 * SVQ1 Encoder (c) 2004 Mike Melanson <melanson@pcisys.net>
11 * This file is part of FFmpeg.
13 * FFmpeg is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Lesser General Public
15 * License as published by the Free Software Foundation; either
16 * version 2.1 of the License, or (at your option) any later version.
18 * FFmpeg is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Lesser General Public License for more details.
23 * You should have received a copy of the GNU Lesser General Public
24 * License along with FFmpeg; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
30 * Sorenson Vector Quantizer #1 (SVQ1) video codec.
31 * For more information of the SVQ1 algorithm, visit:
32 * http://www.pcisys.net/~melanson/codecs/
45 extern const uint8_t ff_mvtab[33][2];
47 static VLC svq1_block_type;
48 static VLC svq1_motion_component;
49 static VLC svq1_intra_multistage[6];
50 static VLC svq1_inter_multistage[6];
51 static VLC svq1_intra_mean;
52 static VLC svq1_inter_mean;
54 /* motion vector (prediction) */
55 typedef struct svq1_pmv_s {
60 typedef struct SVQ1Context {
67 int nonref; // 1 if the current frame won't be referenced
70 static const uint8_t string_table[256] = {
71 0x00, 0xD5, 0x7F, 0xAA, 0xFE, 0x2B, 0x81, 0x54,
72 0x29, 0xFC, 0x56, 0x83, 0xD7, 0x02, 0xA8, 0x7D,
73 0x52, 0x87, 0x2D, 0xF8, 0xAC, 0x79, 0xD3, 0x06,
74 0x7B, 0xAE, 0x04, 0xD1, 0x85, 0x50, 0xFA, 0x2F,
75 0xA4, 0x71, 0xDB, 0x0E, 0x5A, 0x8F, 0x25, 0xF0,
76 0x8D, 0x58, 0xF2, 0x27, 0x73, 0xA6, 0x0C, 0xD9,
77 0xF6, 0x23, 0x89, 0x5C, 0x08, 0xDD, 0x77, 0xA2,
78 0xDF, 0x0A, 0xA0, 0x75, 0x21, 0xF4, 0x5E, 0x8B,
79 0x9D, 0x48, 0xE2, 0x37, 0x63, 0xB6, 0x1C, 0xC9,
80 0xB4, 0x61, 0xCB, 0x1E, 0x4A, 0x9F, 0x35, 0xE0,
81 0xCF, 0x1A, 0xB0, 0x65, 0x31, 0xE4, 0x4E, 0x9B,
82 0xE6, 0x33, 0x99, 0x4C, 0x18, 0xCD, 0x67, 0xB2,
83 0x39, 0xEC, 0x46, 0x93, 0xC7, 0x12, 0xB8, 0x6D,
84 0x10, 0xC5, 0x6F, 0xBA, 0xEE, 0x3B, 0x91, 0x44,
85 0x6B, 0xBE, 0x14, 0xC1, 0x95, 0x40, 0xEA, 0x3F,
86 0x42, 0x97, 0x3D, 0xE8, 0xBC, 0x69, 0xC3, 0x16,
87 0xEF, 0x3A, 0x90, 0x45, 0x11, 0xC4, 0x6E, 0xBB,
88 0xC6, 0x13, 0xB9, 0x6C, 0x38, 0xED, 0x47, 0x92,
89 0xBD, 0x68, 0xC2, 0x17, 0x43, 0x96, 0x3C, 0xE9,
90 0x94, 0x41, 0xEB, 0x3E, 0x6A, 0xBF, 0x15, 0xC0,
91 0x4B, 0x9E, 0x34, 0xE1, 0xB5, 0x60, 0xCA, 0x1F,
92 0x62, 0xB7, 0x1D, 0xC8, 0x9C, 0x49, 0xE3, 0x36,
93 0x19, 0xCC, 0x66, 0xB3, 0xE7, 0x32, 0x98, 0x4D,
94 0x30, 0xE5, 0x4F, 0x9A, 0xCE, 0x1B, 0xB1, 0x64,
95 0x72, 0xA7, 0x0D, 0xD8, 0x8C, 0x59, 0xF3, 0x26,
96 0x5B, 0x8E, 0x24, 0xF1, 0xA5, 0x70, 0xDA, 0x0F,
97 0x20, 0xF5, 0x5F, 0x8A, 0xDE, 0x0B, 0xA1, 0x74,
98 0x09, 0xDC, 0x76, 0xA3, 0xF7, 0x22, 0x88, 0x5D,
99 0xD6, 0x03, 0xA9, 0x7C, 0x28, 0xFD, 0x57, 0x82,
100 0xFF, 0x2A, 0x80, 0x55, 0x01, 0xD4, 0x7E, 0xAB,
101 0x84, 0x51, 0xFB, 0x2E, 0x7A, 0xAF, 0x05, 0xD0,
102 0xAD, 0x78, 0xD2, 0x07, 0x53, 0x86, 0x2C, 0xF9
105 #define SVQ1_PROCESS_VECTOR() \
106 for (; level > 0; i++) { \
107 /* process next depth */ \
113 /* divide block if next bit set */ \
114 if (!get_bits1(bitbuf)) \
116 /* add child nodes */ \
117 list[n++] = list[i]; \
118 list[n++] = list[i] + (((level & 1) ? pitch : 1) << ((level >> 1) + 1));\
121 #define SVQ1_ADD_CODEBOOK() \
122 /* add codebook entries to vector */ \
123 for (j = 0; j < stages; j++) { \
124 n3 = codebook[entries[j]] ^ 0x80808080; \
125 n1 += (n3 & 0xFF00FF00) >> 8; \
126 n2 += n3 & 0x00FF00FF; \
129 /* clip to [0..255] */ \
130 if (n1 & 0xFF00FF00) { \
131 n3 = (n1 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
133 n1 |= (~n1 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
134 n1 &= n3 & 0x00FF00FF; \
137 if (n2 & 0xFF00FF00) { \
138 n3 = (n2 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
140 n2 |= (~n2 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
141 n2 &= n3 & 0x00FF00FF; \
144 #define SVQ1_CALC_CODEBOOK_ENTRIES(cbook) \
145 codebook = (const uint32_t *)cbook[level]; \
147 bit_cache = get_bits(bitbuf, 4 * stages); \
148 /* calculate codebook entries for this vector */ \
149 for (j = 0; j < stages; j++) { \
150 entries[j] = (((bit_cache >> (4 * (stages - j - 1))) & 0xF) + \
151 16 * j) << (level + 1); \
153 mean -= stages * 128; \
154 n4 = (mean << 16) + mean;
156 static int svq1_decode_block_intra(GetBitContext *bitbuf, uint8_t *pixels,
162 const uint32_t *codebook;
166 unsigned x, y, width, height, level;
167 uint32_t n1, n2, n3, n4;
169 /* initialize list for breadth first processing of vectors */
172 /* recursively process vector */
173 for (i = 0, m = 1, n = 1, level = 5; i < n; i++) {
174 SVQ1_PROCESS_VECTOR();
176 /* destination address and vector size */
177 dst = (uint32_t *)list[i];
178 width = 1 << ((4 + level) / 2);
179 height = 1 << ((3 + level) / 2);
181 /* get number of stages (-1 skips vector, 0 for mean only) */
182 stages = get_vlc2(bitbuf, svq1_intra_multistage[level].table, 3, 3) - 1;
185 for (y = 0; y < height; y++)
186 memset(&dst[y * (pitch / 4)], 0, width);
187 continue; /* skip vector */
190 if (stages > 0 && level >= 4) {
192 "Error (svq1_decode_block_intra): invalid vector: stages=%i level=%i\n",
194 return AVERROR_INVALIDDATA; /* invalid vector */
197 mean = get_vlc2(bitbuf, svq1_intra_mean.table, 8, 3);
200 for (y = 0; y < height; y++)
201 memset(&dst[y * (pitch / 4)], mean, width);
203 SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_intra_codebooks);
205 for (y = 0; y < height; y++) {
206 for (x = 0; x < width / 4; x++, codebook++) {
211 dst[x] = n1 << 8 | n2;
221 static int svq1_decode_block_non_intra(GetBitContext *bitbuf, uint8_t *pixels,
227 const uint32_t *codebook;
231 int x, y, width, height, level;
232 uint32_t n1, n2, n3, n4;
234 /* initialize list for breadth first processing of vectors */
237 /* recursively process vector */
238 for (i = 0, m = 1, n = 1, level = 5; i < n; i++) {
239 SVQ1_PROCESS_VECTOR();
241 /* destination address and vector size */
242 dst = (uint32_t *)list[i];
243 width = 1 << ((4 + level) / 2);
244 height = 1 << ((3 + level) / 2);
246 /* get number of stages (-1 skips vector, 0 for mean only) */
247 stages = get_vlc2(bitbuf, svq1_inter_multistage[level].table, 3, 2) - 1;
250 continue; /* skip vector */
252 if ((stages > 0) && (level >= 4)) {
254 "Error (svq1_decode_block_non_intra): invalid vector: stages=%i level=%i\n",
256 return AVERROR_INVALIDDATA; /* invalid vector */
259 mean = get_vlc2(bitbuf, svq1_inter_mean.table, 9, 3) - 256;
261 SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_inter_codebooks);
263 for (y = 0; y < height; y++) {
264 for (x = 0; x < width / 4; x++, codebook++) {
266 /* add mean value to vector */
267 n1 = n4 + ((n3 & 0xFF00FF00) >> 8);
268 n2 = n4 + (n3 & 0x00FF00FF);
271 dst[x] = n1 << 8 | n2;
279 static int svq1_decode_motion_vector(GetBitContext *bitbuf, svq1_pmv *mv,
285 for (i = 0; i < 2; i++) {
286 /* get motion code */
287 diff = get_vlc2(bitbuf, svq1_motion_component.table, 7, 2);
289 return AVERROR_INVALIDDATA;
291 if (get_bits1(bitbuf))
295 /* add median of motion vector predictors and clip result */
297 mv->y = sign_extend(diff + mid_pred(pmv[0]->y, pmv[1]->y, pmv[2]->y), 6);
299 mv->x = sign_extend(diff + mid_pred(pmv[0]->x, pmv[1]->x, pmv[2]->x), 6);
305 static void svq1_skip_block(uint8_t *current, uint8_t *previous,
306 int pitch, int x, int y)
312 src = &previous[x + y * pitch];
315 for (i = 0; i < 16; i++) {
316 memcpy(dst, src, 16);
322 static int svq1_motion_inter_block(DSPContext *dsp, GetBitContext *bitbuf,
323 uint8_t *current, uint8_t *previous,
324 int pitch, svq1_pmv *motion, int x, int y)
332 /* predict and decode motion vector */
338 pmv[1] = &motion[x / 8 + 2];
339 pmv[2] = &motion[x / 8 + 4];
342 result = svq1_decode_motion_vector(bitbuf, &mv, pmv);
347 motion[x / 8 + 2].x =
348 motion[x / 8 + 3].x = mv.x;
350 motion[x / 8 + 2].y =
351 motion[x / 8 + 3].y = mv.y;
353 if (y + (mv.y >> 1) < 0)
355 if (x + (mv.x >> 1) < 0)
358 src = &previous[(x + (mv.x >> 1)) + (y + (mv.y >> 1)) * pitch];
361 dsp->put_pixels_tab[0][(mv.y & 1) << 1 | (mv.x & 1)](dst, src, pitch, 16);
366 static int svq1_motion_inter_4v_block(DSPContext *dsp, GetBitContext *bitbuf,
367 uint8_t *current, uint8_t *previous,
368 int pitch, svq1_pmv *motion, int x, int y)
376 /* predict and decode motion vector (0) */
382 pmv[1] = &motion[(x / 8) + 2];
383 pmv[2] = &motion[(x / 8) + 4];
386 result = svq1_decode_motion_vector(bitbuf, &mv, pmv);
390 /* predict and decode motion vector (1) */
396 pmv[1] = &motion[(x / 8) + 3];
398 result = svq1_decode_motion_vector(bitbuf, &motion[0], pmv);
402 /* predict and decode motion vector (2) */
404 pmv[2] = &motion[(x / 8) + 1];
406 result = svq1_decode_motion_vector(bitbuf, &motion[(x / 8) + 2], pmv);
410 /* predict and decode motion vector (3) */
411 pmv[2] = &motion[(x / 8) + 2];
412 pmv[3] = &motion[(x / 8) + 3];
414 result = svq1_decode_motion_vector(bitbuf, pmv[3], pmv);
418 /* form predictions */
419 for (i = 0; i < 4; i++) {
420 int mvx = pmv[i]->x + (i & 1) * 16;
421 int mvy = pmv[i]->y + (i >> 1) * 16;
423 // FIXME: clipping or padding?
424 if (y + (mvy >> 1) < 0)
426 if (x + (mvx >> 1) < 0)
429 src = &previous[(x + (mvx >> 1)) + (y + (mvy >> 1)) * pitch];
432 dsp->put_pixels_tab[1][((mvy & 1) << 1) | (mvx & 1)](dst, src, pitch, 8);
434 /* select next block */
436 current += 8 * (pitch - 1);
444 static int svq1_decode_delta_block(AVCodecContext *avctx, DSPContext *dsp,
445 GetBitContext *bitbuf,
446 uint8_t *current, uint8_t *previous,
447 int pitch, svq1_pmv *motion, int x, int y)
453 block_type = get_vlc2(bitbuf, svq1_block_type.table, 2, 2);
455 /* reset motion vectors */
456 if (block_type == SVQ1_BLOCK_SKIP || block_type == SVQ1_BLOCK_INTRA) {
459 motion[x / 8 + 2].x =
460 motion[x / 8 + 2].y =
461 motion[x / 8 + 3].x =
462 motion[x / 8 + 3].y = 0;
465 switch (block_type) {
466 case SVQ1_BLOCK_SKIP:
467 svq1_skip_block(current, previous, pitch, x, y);
470 case SVQ1_BLOCK_INTER:
471 result = svq1_motion_inter_block(dsp, bitbuf, current, previous,
472 pitch, motion, x, y);
475 av_dlog(avctx, "Error in svq1_motion_inter_block %i\n", result);
478 result = svq1_decode_block_non_intra(bitbuf, current, pitch);
481 case SVQ1_BLOCK_INTER_4V:
482 result = svq1_motion_inter_4v_block(dsp, bitbuf, current, previous,
483 pitch, motion, x, y);
486 av_dlog(avctx, "Error in svq1_motion_inter_4v_block %i\n", result);
489 result = svq1_decode_block_non_intra(bitbuf, current, pitch);
492 case SVQ1_BLOCK_INTRA:
493 result = svq1_decode_block_intra(bitbuf, current, pitch);
500 static void svq1_parse_string(GetBitContext *bitbuf, uint8_t *out)
505 out[0] = get_bits(bitbuf, 8);
506 seed = string_table[out[0]];
508 for (i = 1; i <= out[0]; i++) {
509 out[i] = get_bits(bitbuf, 8) ^ seed;
510 seed = string_table[out[i] ^ seed];
514 static int svq1_decode_frame_header(AVCodecContext *avctx, AVFrame *frame)
516 SVQ1Context *s = avctx->priv_data;
517 GetBitContext *bitbuf = &s->gb;
519 int width = s->width;
520 int height = s->height;
522 skip_bits(bitbuf, 8); /* temporal_reference */
526 switch (get_bits(bitbuf, 2)) {
528 frame->pict_type = AV_PICTURE_TYPE_I;
533 frame->pict_type = AV_PICTURE_TYPE_P;
536 av_log(avctx, AV_LOG_ERROR, "Invalid frame type.\n");
537 return AVERROR_INVALIDDATA;
540 if (frame->pict_type == AV_PICTURE_TYPE_I) {
542 if (s->frame_code == 0x50 || s->frame_code == 0x60) {
543 int csum = get_bits(bitbuf, 16);
545 csum = ff_svq1_packet_checksum(bitbuf->buffer,
546 bitbuf->size_in_bits >> 3,
549 av_dlog(avctx, "%s checksum (%02x) for packet data\n",
550 (csum == 0) ? "correct" : "incorrect", csum);
553 if ((s->frame_code ^ 0x10) >= 0x50) {
556 svq1_parse_string(bitbuf, msg);
558 av_log(avctx, AV_LOG_INFO,
559 "embedded message: \"%s\"\n", (char *)msg);
562 skip_bits(bitbuf, 2);
563 skip_bits(bitbuf, 2);
566 /* load frame size */
567 frame_size_code = get_bits(bitbuf, 3);
569 if (frame_size_code == 7) {
570 /* load width, height (12 bits each) */
571 width = get_bits(bitbuf, 12);
572 height = get_bits(bitbuf, 12);
574 if (!width || !height)
575 return AVERROR_INVALIDDATA;
577 /* get width, height from table */
578 width = ff_svq1_frame_size_table[frame_size_code][0];
579 height = ff_svq1_frame_size_table[frame_size_code][1];
584 if (get_bits1(bitbuf)) {
585 skip_bits1(bitbuf); /* use packet checksum if (1) */
586 skip_bits1(bitbuf); /* component checksums after image data if (1) */
588 if (get_bits(bitbuf, 2) != 0)
589 return AVERROR_INVALIDDATA;
592 if (get_bits1(bitbuf)) {
594 skip_bits(bitbuf, 4);
596 skip_bits(bitbuf, 2);
598 while (get_bits1(bitbuf))
599 skip_bits(bitbuf, 8);
607 static int svq1_decode_frame(AVCodecContext *avctx, void *data,
608 int *got_frame, AVPacket *avpkt)
610 const uint8_t *buf = avpkt->data;
611 int buf_size = avpkt->size;
612 SVQ1Context *s = avctx->priv_data;
613 AVFrame *cur = s->cur;
615 int result, i, x, y, width, height;
619 avctx->release_buffer(avctx, cur);
621 /* initialize bit buffer */
622 init_get_bits(&s->gb, buf, buf_size * 8);
624 /* decode frame header */
625 s->frame_code = get_bits(&s->gb, 22);
627 if ((s->frame_code & ~0x70) || !(s->frame_code & 0x60))
628 return AVERROR_INVALIDDATA;
630 /* swap some header bytes (why?) */
631 if (s->frame_code != 0x20) {
632 uint32_t *src = (uint32_t *)(buf + 4);
635 return AVERROR_INVALIDDATA;
637 for (i = 0; i < 4; i++)
638 src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i];
641 result = svq1_decode_frame_header(avctx, cur);
643 av_dlog(avctx, "Error in svq1_decode_frame_header %i\n", result);
646 avcodec_set_dimensions(avctx, s->width, s->height);
648 if ((avctx->skip_frame >= AVDISCARD_NONREF && s->nonref) ||
649 (avctx->skip_frame >= AVDISCARD_NONKEY &&
650 cur->pict_type != AV_PICTURE_TYPE_I) ||
651 avctx->skip_frame >= AVDISCARD_ALL)
654 result = ff_get_buffer(avctx, cur);
658 pmv = av_malloc((FFALIGN(s->width, 16) / 8 + 3) * sizeof(*pmv));
660 return AVERROR(ENOMEM);
662 /* decode y, u and v components */
663 for (i = 0; i < 3; i++) {
664 int linesize = cur->linesize[i];
666 width = FFALIGN(s->width, 16);
667 height = FFALIGN(s->height, 16);
669 if (avctx->flags & CODEC_FLAG_GRAY)
671 width = FFALIGN(s->width / 4, 16);
672 height = FFALIGN(s->height / 4, 16);
675 current = cur->data[i];
677 if (cur->pict_type == AV_PICTURE_TYPE_I) {
679 for (y = 0; y < height; y += 16) {
680 for (x = 0; x < width; x += 16) {
681 result = svq1_decode_block_intra(&s->gb, ¤t[x],
684 av_log(avctx, AV_LOG_ERROR,
685 "Error in svq1_decode_block %i (keyframe)\n",
690 current += 16 * linesize;
694 uint8_t *previous = s->prev->data[i];
695 if (!previous || s->prev->width != s->cur->width || s->prev->height != s->cur->height) {
696 av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");
697 result = AVERROR_INVALIDDATA;
701 memset(pmv, 0, ((width / 8) + 3) * sizeof(svq1_pmv));
703 for (y = 0; y < height; y += 16) {
704 for (x = 0; x < width; x += 16) {
705 result = svq1_decode_delta_block(avctx, &s->dsp,
711 "Error in svq1_decode_delta_block %i\n",
720 current += 16 * linesize;
725 *(AVFrame*)data = *cur;
726 cur->qscale_table = NULL;
728 FFSWAP(AVFrame*, s->cur, s->prev);
738 static av_cold int svq1_decode_init(AVCodecContext *avctx)
740 SVQ1Context *s = avctx->priv_data;
744 s->cur = avcodec_alloc_frame();
745 s->prev = avcodec_alloc_frame();
746 if (!s->cur || !s->prev) {
747 avcodec_free_frame(&s->cur);
748 avcodec_free_frame(&s->prev);
749 return AVERROR(ENOMEM);
752 s->width = avctx->width + 3 & ~3;
753 s->height = avctx->height + 3 & ~3;
754 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
756 ff_dsputil_init(&s->dsp, avctx);
758 INIT_VLC_STATIC(&svq1_block_type, 2, 4,
759 &ff_svq1_block_type_vlc[0][1], 2, 1,
760 &ff_svq1_block_type_vlc[0][0], 2, 1, 6);
762 INIT_VLC_STATIC(&svq1_motion_component, 7, 33,
763 &ff_mvtab[0][1], 2, 1,
764 &ff_mvtab[0][0], 2, 1, 176);
766 for (i = 0; i < 6; i++) {
767 static const uint8_t sizes[2][6] = { { 14, 10, 14, 18, 16, 18 },
768 { 10, 10, 14, 14, 14, 16 } };
769 static VLC_TYPE table[168][2];
770 svq1_intra_multistage[i].table = &table[offset];
771 svq1_intra_multistage[i].table_allocated = sizes[0][i];
772 offset += sizes[0][i];
773 init_vlc(&svq1_intra_multistage[i], 3, 8,
774 &ff_svq1_intra_multistage_vlc[i][0][1], 2, 1,
775 &ff_svq1_intra_multistage_vlc[i][0][0], 2, 1,
776 INIT_VLC_USE_NEW_STATIC);
777 svq1_inter_multistage[i].table = &table[offset];
778 svq1_inter_multistage[i].table_allocated = sizes[1][i];
779 offset += sizes[1][i];
780 init_vlc(&svq1_inter_multistage[i], 3, 8,
781 &ff_svq1_inter_multistage_vlc[i][0][1], 2, 1,
782 &ff_svq1_inter_multistage_vlc[i][0][0], 2, 1,
783 INIT_VLC_USE_NEW_STATIC);
786 INIT_VLC_STATIC(&svq1_intra_mean, 8, 256,
787 &ff_svq1_intra_mean_vlc[0][1], 4, 2,
788 &ff_svq1_intra_mean_vlc[0][0], 4, 2, 632);
790 INIT_VLC_STATIC(&svq1_inter_mean, 9, 512,
791 &ff_svq1_inter_mean_vlc[0][1], 4, 2,
792 &ff_svq1_inter_mean_vlc[0][0], 4, 2, 1434);
797 static av_cold int svq1_decode_end(AVCodecContext *avctx)
799 SVQ1Context *s = avctx->priv_data;
802 avctx->release_buffer(avctx, s->cur);
803 if (s->prev->data[0])
804 avctx->release_buffer(avctx, s->prev);
805 avcodec_free_frame(&s->cur);
806 avcodec_free_frame(&s->prev);
811 static void svq1_flush(AVCodecContext *avctx)
813 SVQ1Context *s = avctx->priv_data;
816 avctx->release_buffer(avctx, s->cur);
817 if (s->prev->data[0])
818 avctx->release_buffer(avctx, s->prev);
821 AVCodec ff_svq1_decoder = {
823 .type = AVMEDIA_TYPE_VIDEO,
824 .id = AV_CODEC_ID_SVQ1,
825 .priv_data_size = sizeof(SVQ1Context),
826 .init = svq1_decode_init,
827 .close = svq1_decode_end,
828 .decode = svq1_decode_frame,
829 .capabilities = CODEC_CAP_DR1,
831 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV410P,
833 .long_name = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),