3 * Copyright (c) 2016 Paul B Mahol
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
25 #define CACHED_BITSTREAM_READER !ARCH_X86_32
27 #include "libavutil/pixdesc.h"
30 #include "bytestream.h"
32 #include "huffyuvdsp.h"
34 #include "lossless_videodsp.h"
37 typedef struct Slice {
42 typedef enum Prediction {
48 typedef struct HuffEntry {
53 typedef struct MagicYUVContext {
59 int planes; // number of encoded planes in bitstream
60 int decorrelate; // postprocessing work
61 int color_matrix; // video color matrix
63 int interlaced; // video is interlaced
64 const uint8_t *buf; // pointer to AVPacket->data
67 Slice *slices[4]; // slice bitstream positions for each plane
68 unsigned int slices_size[4]; // slice sizes for each plane
69 VLC vlc[4]; // VLC for each plane
70 int (*magy_decode_slice)(AVCodecContext *avctx, void *tdata,
72 LLVidDSPContext llviddsp;
75 static int huff_build(HuffEntry he[], uint16_t codes_count[33],
76 VLC *vlc, int nb_elems)
78 unsigned nb_codes = 0, max = 0;
80 for (int i = 32; i > 0; i--) {
81 uint16_t curr = codes_count[i]; // # of leafs of length i
82 codes_count[i] = nb_codes / 2; // # of non-leaf nodes on level i
83 nb_codes = codes_count[i] + curr; // # of nodes on level i
88 for (unsigned i = 0; i < nb_elems; i++) {
89 he[i].code = codes_count[he[i].len];
90 codes_count[he[i].len]++;
92 return init_vlc(vlc, FFMIN(max, 12), nb_elems,
93 &he[0].len, sizeof(he[0]), sizeof(he[0].len),
94 &he[0].code, sizeof(he[0]), sizeof(he[0].code), 0);
97 static void magicyuv_median_pred16(uint16_t *dst, const uint16_t *src1,
98 const uint16_t *diff, intptr_t w,
99 int *left, int *left_top, int max)
107 for (i = 0; i < w; i++) {
108 l = mid_pred(l, src1[i], (l + src1[i] - lt)) + diff[i];
118 static int magy_decode_slice10(AVCodecContext *avctx, void *tdata,
121 MagicYUVContext *s = avctx->priv_data;
122 int interlaced = s->interlaced;
123 const int bps = s->bps;
124 const int max = s->max - 1;
130 for (i = 0; i < s->planes; i++) {
131 int left, lefttop, top;
132 int height = AV_CEIL_RSHIFT(FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height), s->vshift[i]);
133 int width = AV_CEIL_RSHIFT(avctx->coded_width, s->hshift[i]);
134 int sheight = AV_CEIL_RSHIFT(s->slice_height, s->vshift[i]);
135 ptrdiff_t fake_stride = (p->linesize[i] / 2) * (1 + interlaced);
136 ptrdiff_t stride = p->linesize[i] / 2;
138 int ret = init_get_bits8(&gb, s->buf + s->slices[i][j].start,
139 s->slices[i][j].size);
144 flags = get_bits(&gb, 8);
145 pred = get_bits(&gb, 8);
147 dst = (uint16_t *)p->data[i] + j * sheight * stride;
149 if (get_bits_left(&gb) < bps * width * height)
150 return AVERROR_INVALIDDATA;
151 for (k = 0; k < height; k++) {
152 for (x = 0; x < width; x++)
153 dst[x] = get_bits(&gb, bps);
158 for (k = 0; k < height; k++) {
159 for (x = 0; x < width; x++) {
161 if (get_bits_left(&gb) <= 0)
162 return AVERROR_INVALIDDATA;
164 pix = get_vlc2(&gb, s->vlc[i].table, s->vlc[i].bits, 3);
166 return AVERROR_INVALIDDATA;
176 dst = (uint16_t *)p->data[i] + j * sheight * stride;
177 s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
180 s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
183 for (k = 1 + interlaced; k < height; k++) {
184 s->llviddsp.add_left_pred_int16(dst, dst, max, width, dst[-fake_stride]);
189 dst = (uint16_t *)p->data[i] + j * sheight * stride;
190 s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
193 s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
196 for (k = 1 + interlaced; k < height; k++) {
197 top = dst[-fake_stride];
200 for (x = 1; x < width; x++) {
201 top = dst[x - fake_stride];
202 lefttop = dst[x - (fake_stride + 1)];
203 left += top - lefttop + dst[x];
210 dst = (uint16_t *)p->data[i] + j * sheight * stride;
211 s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
214 s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
217 lefttop = left = dst[0];
218 for (k = 1 + interlaced; k < height; k++) {
219 magicyuv_median_pred16(dst, dst - fake_stride, dst, width, &left, &lefttop, max);
220 lefttop = left = dst[0];
225 avpriv_request_sample(avctx, "Unknown prediction: %d", pred);
229 if (s->decorrelate) {
230 int height = FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height);
231 int width = avctx->coded_width;
232 uint16_t *r = (uint16_t *)p->data[0] + j * s->slice_height * p->linesize[0] / 2;
233 uint16_t *g = (uint16_t *)p->data[1] + j * s->slice_height * p->linesize[1] / 2;
234 uint16_t *b = (uint16_t *)p->data[2] + j * s->slice_height * p->linesize[2] / 2;
236 for (i = 0; i < height; i++) {
237 for (k = 0; k < width; k++) {
238 b[k] = (b[k] + g[k]) & max;
239 r[k] = (r[k] + g[k]) & max;
241 b += p->linesize[0] / 2;
242 g += p->linesize[1] / 2;
243 r += p->linesize[2] / 2;
250 static int magy_decode_slice(AVCodecContext *avctx, void *tdata,
253 MagicYUVContext *s = avctx->priv_data;
254 int interlaced = s->interlaced;
256 int i, k, x, min_width;
260 for (i = 0; i < s->planes; i++) {
261 int left, lefttop, top;
262 int height = AV_CEIL_RSHIFT(FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height), s->vshift[i]);
263 int width = AV_CEIL_RSHIFT(avctx->coded_width, s->hshift[i]);
264 int sheight = AV_CEIL_RSHIFT(s->slice_height, s->vshift[i]);
265 ptrdiff_t fake_stride = p->linesize[i] * (1 + interlaced);
266 ptrdiff_t stride = p->linesize[i];
267 const uint8_t *slice = s->buf + s->slices[i][j].start;
270 flags = bytestream_get_byte(&slice);
271 pred = bytestream_get_byte(&slice);
273 dst = p->data[i] + j * sheight * stride;
275 if (s->slices[i][j].size - 2 < width * height)
276 return AVERROR_INVALIDDATA;
277 for (k = 0; k < height; k++) {
278 bytestream_get_buffer(&slice, dst, width);
282 int ret = init_get_bits8(&gb, slice, s->slices[i][j].size - 2);
287 for (k = 0; k < height; k++) {
288 for (x = 0; x < width; x++) {
290 if (get_bits_left(&gb) <= 0)
291 return AVERROR_INVALIDDATA;
293 pix = get_vlc2(&gb, s->vlc[i].table, s->vlc[i].bits, 3);
295 return AVERROR_INVALIDDATA;
305 dst = p->data[i] + j * sheight * stride;
306 s->llviddsp.add_left_pred(dst, dst, width, 0);
309 s->llviddsp.add_left_pred(dst, dst, width, 0);
312 for (k = 1 + interlaced; k < height; k++) {
313 s->llviddsp.add_left_pred(dst, dst, width, dst[-fake_stride]);
318 dst = p->data[i] + j * sheight * stride;
319 s->llviddsp.add_left_pred(dst, dst, width, 0);
322 s->llviddsp.add_left_pred(dst, dst, width, 0);
325 min_width = FFMIN(width, 32);
326 for (k = 1 + interlaced; k < height; k++) {
327 top = dst[-fake_stride];
330 for (x = 1; x < min_width; x++) { /* dsp need aligned 32 */
331 top = dst[x - fake_stride];
332 lefttop = dst[x - (fake_stride + 1)];
333 left += top - lefttop + dst[x];
337 s->llviddsp.add_gradient_pred(dst + 32, fake_stride, width - 32);
342 dst = p->data[i] + j * sheight * stride;
343 s->llviddsp.add_left_pred(dst, dst, width, 0);
346 s->llviddsp.add_left_pred(dst, dst, width, 0);
349 lefttop = left = dst[0];
350 for (k = 1 + interlaced; k < height; k++) {
351 s->llviddsp.add_median_pred(dst, dst - fake_stride,
352 dst, width, &left, &lefttop);
353 lefttop = left = dst[0];
358 avpriv_request_sample(avctx, "Unknown prediction: %d", pred);
362 if (s->decorrelate) {
363 int height = FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height);
364 int width = avctx->coded_width;
365 uint8_t *b = p->data[0] + j * s->slice_height * p->linesize[0];
366 uint8_t *g = p->data[1] + j * s->slice_height * p->linesize[1];
367 uint8_t *r = p->data[2] + j * s->slice_height * p->linesize[2];
369 for (i = 0; i < height; i++) {
370 s->llviddsp.add_bytes(b, g, width);
371 s->llviddsp.add_bytes(r, g, width);
381 static int build_huffman(AVCodecContext *avctx, const uint8_t *table,
382 int table_size, int max)
384 MagicYUVContext *s = avctx->priv_data;
387 uint16_t length_count[33] = { 0 };
390 bytestream2_init(&gb, table, table_size);
392 while (bytestream2_get_bytes_left(&gb) > 0) {
393 int b = bytestream2_peek_byteu(&gb) & 0x80;
394 int x = bytestream2_get_byteu(&gb) & ~0x80;
398 if (bytestream2_get_bytes_left(&gb) <= 0)
400 l += bytestream2_get_byteu(&gb);
403 if (k > max || x == 0 || x > 32) {
404 av_log(avctx, AV_LOG_ERROR, "Invalid Huffman codes\n");
405 return AVERROR_INVALIDDATA;
408 length_count[x] += l;
414 if (huff_build(he, length_count, &s->vlc[i], max)) {
415 av_log(avctx, AV_LOG_ERROR, "Cannot build Huffman codes\n");
416 return AVERROR_INVALIDDATA;
419 if (i == s->planes) {
422 memset(length_count, 0, sizeof(length_count));
426 if (i != s->planes) {
427 av_log(avctx, AV_LOG_ERROR, "Huffman tables too short\n");
428 return AVERROR_INVALIDDATA;
434 static int magy_decode_frame(AVCodecContext *avctx, void *data,
435 int *got_frame, AVPacket *avpkt)
437 MagicYUVContext *s = avctx->priv_data;
438 ThreadFrame frame = { .f = data };
441 uint32_t first_offset, offset, next_offset, header_size, slice_width;
442 int width, height, format, version, table_size;
445 if (avpkt->size < 36)
446 return AVERROR_INVALIDDATA;
448 bytestream2_init(&gb, avpkt->data, avpkt->size);
449 if (bytestream2_get_le32u(&gb) != MKTAG('M', 'A', 'G', 'Y'))
450 return AVERROR_INVALIDDATA;
452 header_size = bytestream2_get_le32u(&gb);
453 if (header_size < 32 || header_size >= avpkt->size) {
454 av_log(avctx, AV_LOG_ERROR,
455 "header or packet too small %"PRIu32"\n", header_size);
456 return AVERROR_INVALIDDATA;
459 version = bytestream2_get_byteu(&gb);
461 avpriv_request_sample(avctx, "Version %d", version);
462 return AVERROR_PATCHWELCOME;
472 format = bytestream2_get_byteu(&gb);
475 avctx->pix_fmt = AV_PIX_FMT_GBRP;
479 avctx->pix_fmt = AV_PIX_FMT_GBRAP;
483 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
486 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
491 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
498 avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
501 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
504 avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
510 avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
514 avctx->pix_fmt = AV_PIX_FMT_GBRP10;
519 avctx->pix_fmt = AV_PIX_FMT_GBRAP10;
524 avctx->pix_fmt = AV_PIX_FMT_GBRP12;
529 avctx->pix_fmt = AV_PIX_FMT_GBRAP12;
534 avctx->pix_fmt = AV_PIX_FMT_GRAY10;
538 avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
546 avpriv_request_sample(avctx, "Format 0x%X", format);
547 return AVERROR_PATCHWELCOME;
549 s->max = 1 << s->bps;
550 s->magy_decode_slice = s->bps == 8 ? magy_decode_slice : magy_decode_slice10;
551 s->planes = av_pix_fmt_count_planes(avctx->pix_fmt);
553 bytestream2_skipu(&gb, 1);
554 s->color_matrix = bytestream2_get_byteu(&gb);
555 s->flags = bytestream2_get_byteu(&gb);
556 s->interlaced = !!(s->flags & 2);
557 bytestream2_skipu(&gb, 3);
559 width = bytestream2_get_le32u(&gb);
560 height = bytestream2_get_le32u(&gb);
561 ret = ff_set_dimensions(avctx, width, height);
565 slice_width = bytestream2_get_le32u(&gb);
566 if (slice_width != avctx->coded_width) {
567 avpriv_request_sample(avctx, "Slice width %"PRIu32, slice_width);
568 return AVERROR_PATCHWELCOME;
570 s->slice_height = bytestream2_get_le32u(&gb);
571 if (s->slice_height <= 0 || s->slice_height > INT_MAX - avctx->coded_height) {
572 av_log(avctx, AV_LOG_ERROR,
573 "invalid slice height: %d\n", s->slice_height);
574 return AVERROR_INVALIDDATA;
577 bytestream2_skipu(&gb, 4);
579 s->nb_slices = (avctx->coded_height + s->slice_height - 1) / s->slice_height;
580 if (s->nb_slices > INT_MAX / FFMAX(sizeof(Slice), 4 * 5)) {
581 av_log(avctx, AV_LOG_ERROR,
582 "invalid number of slices: %d\n", s->nb_slices);
583 return AVERROR_INVALIDDATA;
587 if ((s->slice_height >> s->vshift[1]) < 2) {
588 av_log(avctx, AV_LOG_ERROR, "impossible slice height\n");
589 return AVERROR_INVALIDDATA;
591 if ((avctx->coded_height % s->slice_height) && ((avctx->coded_height % s->slice_height) >> s->vshift[1]) < 2) {
592 av_log(avctx, AV_LOG_ERROR, "impossible height\n");
593 return AVERROR_INVALIDDATA;
597 if (bytestream2_get_bytes_left(&gb) <= s->nb_slices * s->planes * 5)
598 return AVERROR_INVALIDDATA;
599 for (i = 0; i < s->planes; i++) {
600 av_fast_malloc(&s->slices[i], &s->slices_size[i], s->nb_slices * sizeof(Slice));
602 return AVERROR(ENOMEM);
604 offset = bytestream2_get_le32u(&gb);
605 if (offset >= avpkt->size - header_size)
606 return AVERROR_INVALIDDATA;
609 first_offset = offset;
611 for (j = 0; j < s->nb_slices - 1; j++) {
612 s->slices[i][j].start = offset + header_size;
614 next_offset = bytestream2_get_le32u(&gb);
615 if (next_offset <= offset || next_offset >= avpkt->size - header_size)
616 return AVERROR_INVALIDDATA;
618 s->slices[i][j].size = next_offset - offset;
619 if (s->slices[i][j].size < 2)
620 return AVERROR_INVALIDDATA;
621 offset = next_offset;
624 s->slices[i][j].start = offset + header_size;
625 s->slices[i][j].size = avpkt->size - s->slices[i][j].start;
628 if (bytestream2_get_byteu(&gb) != s->planes)
629 return AVERROR_INVALIDDATA;
631 bytestream2_skipu(&gb, s->nb_slices * s->planes);
633 table_size = header_size + first_offset - bytestream2_tell(&gb);
635 return AVERROR_INVALIDDATA;
637 ret = build_huffman(avctx, avpkt->data + bytestream2_tell(&gb),
642 p->pict_type = AV_PICTURE_TYPE_I;
645 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
648 s->buf = avpkt->data;
650 avctx->execute2(avctx, s->magy_decode_slice, NULL, NULL, s->nb_slices);
652 if (avctx->pix_fmt == AV_PIX_FMT_GBRP ||
653 avctx->pix_fmt == AV_PIX_FMT_GBRAP ||
654 avctx->pix_fmt == AV_PIX_FMT_GBRP10 ||
655 avctx->pix_fmt == AV_PIX_FMT_GBRAP10||
656 avctx->pix_fmt == AV_PIX_FMT_GBRAP12||
657 avctx->pix_fmt == AV_PIX_FMT_GBRP12) {
658 FFSWAP(uint8_t*, p->data[0], p->data[1]);
659 FFSWAP(int, p->linesize[0], p->linesize[1]);
661 switch (s->color_matrix) {
663 p->colorspace = AVCOL_SPC_BT470BG;
666 p->colorspace = AVCOL_SPC_BT709;
669 p->color_range = (s->flags & 4) ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
677 static av_cold int magy_decode_init(AVCodecContext *avctx)
679 MagicYUVContext *s = avctx->priv_data;
680 ff_llviddsp_init(&s->llviddsp);
684 static av_cold int magy_decode_end(AVCodecContext *avctx)
686 MagicYUVContext * const s = avctx->priv_data;
689 for (i = 0; i < FF_ARRAY_ELEMS(s->slices); i++) {
690 av_freep(&s->slices[i]);
691 s->slices_size[i] = 0;
692 ff_free_vlc(&s->vlc[i]);
698 AVCodec ff_magicyuv_decoder = {
700 .long_name = NULL_IF_CONFIG_SMALL("MagicYUV video"),
701 .type = AVMEDIA_TYPE_VIDEO,
702 .id = AV_CODEC_ID_MAGICYUV,
703 .priv_data_size = sizeof(MagicYUVContext),
704 .init = magy_decode_init,
705 .close = magy_decode_end,
706 .decode = magy_decode_frame,
707 .capabilities = AV_CODEC_CAP_DR1 |
708 AV_CODEC_CAP_FRAME_THREADS |
709 AV_CODEC_CAP_SLICE_THREADS,
710 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,