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 Libav.
13 * Libav 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 * Libav 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 Libav; 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) == 0) \
116 /* add child nodes */ \
117 list[n++] = list[i]; \
118 list[n++] = list[i] + \
119 (((level & 1) ? pitch : 1) << (level / 2 + 1)); \
122 #define SVQ1_ADD_CODEBOOK() \
123 /* add codebook entries to vector */ \
124 for (j = 0; j < stages; j++) { \
125 n3 = codebook[entries[j]] ^ 0x80808080; \
126 n1 += (n3 & 0xFF00FF00) >> 8; \
127 n2 += n3 & 0x00FF00FF; \
130 /* clip to [0..255] */ \
131 if (n1 & 0xFF00FF00) { \
132 n3 = (n1 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
134 n1 |= (~n1 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
135 n1 &= n3 & 0x00FF00FF; \
138 if (n2 & 0xFF00FF00) { \
139 n3 = (n2 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
141 n2 |= (~n2 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
142 n2 &= n3 & 0x00FF00FF; \
145 #define SVQ1_CALC_CODEBOOK_ENTRIES(cbook) \
146 codebook = (const uint32_t *)cbook[level]; \
148 bit_cache = get_bits(bitbuf, 4 * stages); \
149 /* calculate codebook entries for this vector */ \
150 for (j = 0; j < stages; j++) { \
151 entries[j] = (((bit_cache >> (4 * (stages - j - 1))) & 0xF) + \
152 16 * j) << (level + 1); \
154 mean -= stages * 128; \
155 n4 = mean + (mean >> 31) << 16 | (mean & 0xFFFF);
157 static int svq1_decode_block_intra(GetBitContext *bitbuf, uint8_t *pixels,
163 const uint32_t *codebook;
167 unsigned x, y, width, height, level;
168 uint32_t n1, n2, n3, n4;
170 /* initialize list for breadth first processing of vectors */
173 /* recursively process vector */
174 for (i = 0, m = 1, n = 1, level = 5; i < n; i++) {
175 SVQ1_PROCESS_VECTOR();
177 /* destination address and vector size */
178 dst = (uint32_t *)list[i];
179 width = 1 << ((4 + level) / 2);
180 height = 1 << ((3 + level) / 2);
182 /* get number of stages (-1 skips vector, 0 for mean only) */
183 stages = get_vlc2(bitbuf, svq1_intra_multistage[level].table, 3, 3) - 1;
186 for (y = 0; y < height; y++)
187 memset(&dst[y * (pitch / 4)], 0, width);
188 continue; /* skip vector */
191 if (stages > 0 && level >= 4) {
193 "Error (svq1_decode_block_intra): invalid vector: stages=%i level=%i\n",
195 return AVERROR_INVALIDDATA; /* invalid vector */
198 mean = get_vlc2(bitbuf, svq1_intra_mean.table, 8, 3);
201 for (y = 0; y < height; y++)
202 memset(&dst[y * (pitch / 4)], mean, width);
204 SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_intra_codebooks);
206 for (y = 0; y < height; y++) {
207 for (x = 0; x < width / 4; x++, codebook++) {
212 dst[x] = n1 << 8 | n2;
222 static int svq1_decode_block_non_intra(GetBitContext *bitbuf, uint8_t *pixels,
228 const uint32_t *codebook;
232 int x, y, width, height, level;
233 uint32_t n1, n2, n3, n4;
235 /* initialize list for breadth first processing of vectors */
238 /* recursively process vector */
239 for (i = 0, m = 1, n = 1, level = 5; i < n; i++) {
240 SVQ1_PROCESS_VECTOR();
242 /* destination address and vector size */
243 dst = (uint32_t *)list[i];
244 width = 1 << ((4 + level) / 2);
245 height = 1 << ((3 + level) / 2);
247 /* get number of stages (-1 skips vector, 0 for mean only) */
248 stages = get_vlc2(bitbuf, svq1_inter_multistage[level].table, 3, 2) - 1;
251 continue; /* skip vector */
253 if ((stages > 0) && (level >= 4)) {
255 "Error (svq1_decode_block_non_intra): invalid vector: stages=%i level=%i\n",
257 return AVERROR_INVALIDDATA; /* invalid vector */
260 mean = get_vlc2(bitbuf, svq1_inter_mean.table, 9, 3) - 256;
262 SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_inter_codebooks);
264 for (y = 0; y < height; y++) {
265 for (x = 0; x < width / 4; x++, codebook++) {
267 /* add mean value to vector */
268 n1 = n4 + ((n3 & 0xFF00FF00) >> 8);
269 n2 = n4 + (n3 & 0x00FF00FF);
272 dst[x] = n1 << 8 | n2;
280 static int svq1_decode_motion_vector(GetBitContext *bitbuf, svq1_pmv *mv,
286 for (i = 0; i < 2; i++) {
287 /* get motion code */
288 diff = get_vlc2(bitbuf, svq1_motion_component.table, 7, 2);
290 return AVERROR_INVALIDDATA;
292 if (get_bits1(bitbuf))
296 /* add median of motion vector predictors and clip result */
298 mv->y = sign_extend(diff + mid_pred(pmv[0]->y, pmv[1]->y, pmv[2]->y), 6);
300 mv->x = sign_extend(diff + mid_pred(pmv[0]->x, pmv[1]->x, pmv[2]->x), 6);
306 static void svq1_skip_block(uint8_t *current, uint8_t *previous,
307 int pitch, int x, int y)
313 src = &previous[x + y * pitch];
316 for (i = 0; i < 16; i++) {
317 memcpy(dst, src, 16);
323 static int svq1_motion_inter_block(DSPContext *dsp, GetBitContext *bitbuf,
324 uint8_t *current, uint8_t *previous,
325 int pitch, svq1_pmv *motion, int x, int y)
333 /* predict and decode motion vector */
339 pmv[1] = &motion[x / 8 + 2];
340 pmv[2] = &motion[x / 8 + 4];
343 result = svq1_decode_motion_vector(bitbuf, &mv, pmv);
349 motion[x / 8 + 2].x =
350 motion[x / 8 + 3].x = mv.x;
352 motion[x / 8 + 2].y =
353 motion[x / 8 + 3].y = mv.y;
355 if (y + (mv.y >> 1) < 0)
357 if (x + (mv.x >> 1) < 0)
360 src = &previous[(x + (mv.x >> 1)) + (y + (mv.y >> 1)) * pitch];
363 dsp->put_pixels_tab[0][(mv.y & 1) << 1 | (mv.x & 1)](dst, src, pitch, 16);
368 static int svq1_motion_inter_4v_block(DSPContext *dsp, GetBitContext *bitbuf,
369 uint8_t *current, uint8_t *previous,
370 int pitch, svq1_pmv *motion, int x, int y)
378 /* predict and decode motion vector (0) */
384 pmv[1] = &motion[(x / 8) + 2];
385 pmv[2] = &motion[(x / 8) + 4];
388 result = svq1_decode_motion_vector(bitbuf, &mv, pmv);
393 /* predict and decode motion vector (1) */
399 pmv[1] = &motion[(x / 8) + 3];
401 result = svq1_decode_motion_vector(bitbuf, &motion[0], pmv);
406 /* predict and decode motion vector (2) */
408 pmv[2] = &motion[(x / 8) + 1];
410 result = svq1_decode_motion_vector(bitbuf, &motion[(x / 8) + 2], pmv);
415 /* predict and decode motion vector (3) */
416 pmv[2] = &motion[(x / 8) + 2];
417 pmv[3] = &motion[(x / 8) + 3];
419 result = svq1_decode_motion_vector(bitbuf, pmv[3], pmv);
424 /* form predictions */
425 for (i = 0; i < 4; i++) {
426 int mvx = pmv[i]->x + (i & 1) * 16;
427 int mvy = pmv[i]->y + (i >> 1) * 16;
429 // FIXME: clipping or padding?
430 if (y + (mvy >> 1) < 0)
432 if (x + (mvx >> 1) < 0)
435 src = &previous[(x + (mvx >> 1)) + (y + (mvy >> 1)) * pitch];
438 dsp->put_pixels_tab[1][((mvy & 1) << 1) | (mvx & 1)](dst, src, pitch, 8);
440 /* select next block */
442 current += 8 * (pitch - 1);
450 static int svq1_decode_delta_block(AVCodecContext *avctx, DSPContext *dsp,
451 GetBitContext *bitbuf,
452 uint8_t *current, uint8_t *previous,
453 int pitch, svq1_pmv *motion, int x, int y)
459 block_type = get_vlc2(bitbuf, svq1_block_type.table, 2, 2);
461 /* reset motion vectors */
462 if (block_type == SVQ1_BLOCK_SKIP || block_type == SVQ1_BLOCK_INTRA) {
465 motion[x / 8 + 2].x =
466 motion[x / 8 + 2].y =
467 motion[x / 8 + 3].x =
468 motion[x / 8 + 3].y = 0;
471 switch (block_type) {
472 case SVQ1_BLOCK_SKIP:
473 svq1_skip_block(current, previous, pitch, x, y);
476 case SVQ1_BLOCK_INTER:
477 result = svq1_motion_inter_block(dsp, bitbuf, current, previous,
478 pitch, motion, x, y);
481 av_dlog(avctx, "Error in svq1_motion_inter_block %i\n", result);
484 result = svq1_decode_block_non_intra(bitbuf, current, pitch);
487 case SVQ1_BLOCK_INTER_4V:
488 result = svq1_motion_inter_4v_block(dsp, bitbuf, current, previous,
489 pitch, motion, x, y);
492 av_dlog(avctx, "Error in svq1_motion_inter_4v_block %i\n", result);
495 result = svq1_decode_block_non_intra(bitbuf, current, pitch);
498 case SVQ1_BLOCK_INTRA:
499 result = svq1_decode_block_intra(bitbuf, current, pitch);
506 static void svq1_parse_string(GetBitContext *bitbuf, uint8_t *out)
511 out[0] = get_bits(bitbuf, 8);
512 seed = string_table[out[0]];
514 for (i = 1; i <= out[0]; i++) {
515 out[i] = get_bits(bitbuf, 8) ^ seed;
516 seed = string_table[out[i] ^ seed];
520 static int svq1_decode_frame_header(AVCodecContext *avctx, AVFrame *frame)
522 SVQ1Context *s = avctx->priv_data;
523 GetBitContext *bitbuf = &s->gb;
526 skip_bits(bitbuf, 8); /* temporal_reference */
530 switch (get_bits(bitbuf, 2)) {
532 frame->pict_type = AV_PICTURE_TYPE_I;
537 frame->pict_type = AV_PICTURE_TYPE_P;
540 av_log(avctx, AV_LOG_ERROR, "Invalid frame type.\n");
541 return AVERROR_INVALIDDATA;
544 if (frame->pict_type == AV_PICTURE_TYPE_I) {
546 if (s->frame_code == 0x50 || s->frame_code == 0x60) {
547 int csum = get_bits(bitbuf, 16);
549 csum = ff_svq1_packet_checksum(bitbuf->buffer,
550 bitbuf->size_in_bits >> 3,
553 av_dlog(avctx, "%s checksum (%02x) for packet data\n",
554 (csum == 0) ? "correct" : "incorrect", csum);
557 if ((s->frame_code ^ 0x10) >= 0x50) {
560 svq1_parse_string(bitbuf, msg);
562 av_log(avctx, AV_LOG_INFO,
563 "embedded message: \"%s\"\n", (char *)msg);
566 skip_bits(bitbuf, 2);
567 skip_bits(bitbuf, 2);
570 /* load frame size */
571 frame_size_code = get_bits(bitbuf, 3);
573 if (frame_size_code == 7) {
574 /* load width, height (12 bits each) */
575 s->width = get_bits(bitbuf, 12);
576 s->height = get_bits(bitbuf, 12);
578 if (!s->width || !s->height)
579 return AVERROR_INVALIDDATA;
581 /* get width, height from table */
582 s->width = ff_svq1_frame_size_table[frame_size_code][0];
583 s->height = ff_svq1_frame_size_table[frame_size_code][1];
588 if (get_bits1(bitbuf) == 1) {
589 skip_bits1(bitbuf); /* use packet checksum if (1) */
590 skip_bits1(bitbuf); /* component checksums after image data if (1) */
592 if (get_bits(bitbuf, 2) != 0)
593 return AVERROR_INVALIDDATA;
596 if (get_bits1(bitbuf) == 1) {
598 skip_bits(bitbuf, 4);
600 skip_bits(bitbuf, 2);
602 while (get_bits1(bitbuf) == 1)
603 skip_bits(bitbuf, 8);
609 static int svq1_decode_frame(AVCodecContext *avctx, void *data,
610 int *got_frame, AVPacket *avpkt)
612 const uint8_t *buf = avpkt->data;
613 int buf_size = avpkt->size;
614 SVQ1Context *s = avctx->priv_data;
617 int result, i, x, y, width, height;
620 /* initialize bit buffer */
621 init_get_bits(&s->gb, buf, buf_size * 8);
623 /* decode frame header */
624 s->frame_code = get_bits(&s->gb, 22);
626 if ((s->frame_code & ~0x70) || !(s->frame_code & 0x60))
627 return AVERROR_INVALIDDATA;
629 /* swap some header bytes (why?) */
630 if (s->frame_code != 0x20) {
631 uint32_t *src = (uint32_t *)(buf + 4);
633 for (i = 0; i < 4; i++)
634 src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i];
637 result = svq1_decode_frame_header(avctx, cur);
640 av_dlog(avctx, "Error in svq1_decode_frame_header %i\n", result);
643 avcodec_set_dimensions(avctx, s->width, s->height);
645 if ((avctx->skip_frame >= AVDISCARD_NONREF && s->nonref) ||
646 (avctx->skip_frame >= AVDISCARD_NONKEY &&
647 cur->pict_type != AV_PICTURE_TYPE_I) ||
648 avctx->skip_frame >= AVDISCARD_ALL)
651 result = ff_get_buffer(avctx, cur, s->nonref ? 0 : AV_GET_BUFFER_FLAG_REF);
655 pmv = av_malloc((FFALIGN(s->width, 16) / 8 + 3) * sizeof(*pmv));
657 return AVERROR(ENOMEM);
659 /* decode y, u and v components */
660 for (i = 0; i < 3; i++) {
661 int linesize = cur->linesize[i];
663 width = FFALIGN(s->width, 16);
664 height = FFALIGN(s->height, 16);
666 if (avctx->flags & CODEC_FLAG_GRAY)
668 width = FFALIGN(s->width / 4, 16);
669 height = FFALIGN(s->height / 4, 16);
672 current = cur->data[i];
674 if (cur->pict_type == AV_PICTURE_TYPE_I) {
676 for (y = 0; y < height; y += 16) {
677 for (x = 0; x < width; x += 16) {
678 result = svq1_decode_block_intra(&s->gb, ¤t[x],
681 av_log(avctx, AV_LOG_INFO,
682 "Error in svq1_decode_block %i (keyframe)\n",
687 current += 16 * linesize;
691 uint8_t *previous = s->prev->data[i];
693 av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");
694 result = AVERROR_INVALIDDATA;
698 memset(pmv, 0, ((width / 8) + 3) * sizeof(svq1_pmv));
700 for (y = 0; y < height; y += 16) {
701 for (x = 0; x < width; x += 16) {
702 result = svq1_decode_delta_block(avctx, &s->dsp,
708 "Error in svq1_decode_delta_block %i\n",
717 current += 16 * linesize;
723 av_frame_unref(s->prev);
724 result = av_frame_ref(s->prev, cur);
737 static av_cold int svq1_decode_init(AVCodecContext *avctx)
739 SVQ1Context *s = avctx->priv_data;
743 s->prev = avcodec_alloc_frame();
745 return AVERROR(ENOMEM);
747 s->width = avctx->width + 3 & ~3;
748 s->height = avctx->height + 3 & ~3;
749 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
751 ff_dsputil_init(&s->dsp, avctx);
753 INIT_VLC_STATIC(&svq1_block_type, 2, 4,
754 &ff_svq1_block_type_vlc[0][1], 2, 1,
755 &ff_svq1_block_type_vlc[0][0], 2, 1, 6);
757 INIT_VLC_STATIC(&svq1_motion_component, 7, 33,
758 &ff_mvtab[0][1], 2, 1,
759 &ff_mvtab[0][0], 2, 1, 176);
761 for (i = 0; i < 6; i++) {
762 static const uint8_t sizes[2][6] = { { 14, 10, 14, 18, 16, 18 },
763 { 10, 10, 14, 14, 14, 16 } };
764 static VLC_TYPE table[168][2];
765 svq1_intra_multistage[i].table = &table[offset];
766 svq1_intra_multistage[i].table_allocated = sizes[0][i];
767 offset += sizes[0][i];
768 init_vlc(&svq1_intra_multistage[i], 3, 8,
769 &ff_svq1_intra_multistage_vlc[i][0][1], 2, 1,
770 &ff_svq1_intra_multistage_vlc[i][0][0], 2, 1,
771 INIT_VLC_USE_NEW_STATIC);
772 svq1_inter_multistage[i].table = &table[offset];
773 svq1_inter_multistage[i].table_allocated = sizes[1][i];
774 offset += sizes[1][i];
775 init_vlc(&svq1_inter_multistage[i], 3, 8,
776 &ff_svq1_inter_multistage_vlc[i][0][1], 2, 1,
777 &ff_svq1_inter_multistage_vlc[i][0][0], 2, 1,
778 INIT_VLC_USE_NEW_STATIC);
781 INIT_VLC_STATIC(&svq1_intra_mean, 8, 256,
782 &ff_svq1_intra_mean_vlc[0][1], 4, 2,
783 &ff_svq1_intra_mean_vlc[0][0], 4, 2, 632);
785 INIT_VLC_STATIC(&svq1_inter_mean, 9, 512,
786 &ff_svq1_inter_mean_vlc[0][1], 4, 2,
787 &ff_svq1_inter_mean_vlc[0][0], 4, 2, 1434);
792 static av_cold int svq1_decode_end(AVCodecContext *avctx)
794 SVQ1Context *s = avctx->priv_data;
796 av_frame_free(&s->prev);
801 static void svq1_flush(AVCodecContext *avctx)
803 SVQ1Context *s = avctx->priv_data;
805 av_frame_unref(s->prev);
808 AVCodec ff_svq1_decoder = {
810 .type = AVMEDIA_TYPE_VIDEO,
811 .id = AV_CODEC_ID_SVQ1,
812 .priv_data_size = sizeof(SVQ1Context),
813 .init = svq1_decode_init,
814 .close = svq1_decode_end,
815 .decode = svq1_decode_frame,
816 .capabilities = CODEC_CAP_DR1,
818 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV410P,
820 .long_name = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),