FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* NotchLC decoder
3			* Copyright (c) 2020 Paul B Mahol
4			*
5			* This file is part of FFmpeg.
6			*
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.
11			*
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.
16			*
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
20			*/
21
22			#include <stdio.h>
23			#include <string.h>
24
25			#define BITSTREAM_READER_LE
26			#include "libavutil/mem.h"
27			#include "avcodec.h"
28			#include "bytestream.h"
29			#include "codec_internal.h"
30			#include "decode.h"
31			#include "get_bits.h"
32			#include "lzf.h"
33			#include "thread.h"
34
35			typedef struct NotchLCContext {
36			unsigned compressed_size;
37			unsigned format;
38
39			uint8_t *uncompressed_buffer;
40			unsigned uncompressed_size;
41
42			uint8_t *lzf_buffer;
43			int64_t lzf_size;
44
45			unsigned texture_size_x;
46			unsigned texture_size_y;
47			unsigned y_data_row_offsets;
48			unsigned uv_offset_data_offset;
49			unsigned y_control_data_offset;
50			unsigned a_control_word_offset;
51			unsigned y_data_offset;
52			unsigned uv_data_offset;
53			unsigned y_data_size;
54			unsigned a_data_offset;
55			unsigned uv_count_offset;
56			unsigned a_count_size;
57			unsigned data_end;
58
59			GetByteContext gb;
60			PutByteContext pb;
61			} NotchLCContext;
62
63		✗	static av_cold int decode_init(AVCodecContext *avctx)
64			{
65		✗	avctx->pix_fmt = AV_PIX_FMT_YUVA444P12;
66		✗	avctx->color_range = AVCOL_RANGE_JPEG;
67		✗	avctx->colorspace = AVCOL_SPC_RGB;
68		✗	avctx->color_primaries = AVCOL_PRI_BT709;
69		✗	avctx->color_trc = AVCOL_TRC_IEC61966_2_1;
70
71		✗	return 0;
72			}
73
74			#define HISTORY_SIZE (64 * 1024)
75
76		✗	static int lz4_decompress(AVCodecContext *avctx,
77			GetByteContext *gb,
78			PutByteContext *pb)
79			{
80		✗	unsigned reference_pos, delta, pos = 0;
81			uint8_t history[64 * 1024];
82			int match_length;
83
84		✗	while (bytestream2_get_bytes_left(gb) > 0) {
85		✗	uint8_t token = bytestream2_get_byte(gb);
86		✗	int num_literals = token >> 4;
87
88		✗	if (num_literals == 15) {
89			unsigned char current;
90			do {
91		✗	current = bytestream2_get_byte(gb);
92		✗	num_literals += current;
93		✗	} while (current == 255);
94			}
95
96		✗	if (bytestream2_get_bytes_left(gb) < num_literals)
97		✗	return AVERROR_INVALIDDATA;
98
99		✗	if (pos + num_literals < HISTORY_SIZE) {
100		✗	bytestream2_get_buffer(gb, history + pos, num_literals);
101		✗	pos += num_literals;
102			} else {
103		✗	while (num_literals-- > 0) {
104		✗	history[pos++] = bytestream2_get_byte(gb);
105		✗	if (pos == HISTORY_SIZE) {
106		✗	bytestream2_put_buffer(pb, history, HISTORY_SIZE);
107		✗	pos = 0;
108			}
109			}
110			}
111
112		✗	if (bytestream2_get_bytes_left(gb) <= 0)
113		✗	break;
114
115		✗	delta = bytestream2_get_le16(gb);
116		✗	if (delta == 0)
117		✗	return 0;
118		✗	match_length = 4 + (token & 0x0F);
119		✗	if (match_length == 4 + 0x0F) {
120			uint8_t current;
121
122			do {
123		✗	current = bytestream2_get_byte(gb);
124		✗	match_length += current;
125		✗	} while (current == 255);
126			}
127		✗	reference_pos = (pos >= delta) ? (pos - delta) : (HISTORY_SIZE + pos - delta);
128		✗	if (pos + match_length < HISTORY_SIZE && reference_pos + match_length < HISTORY_SIZE) {
129		✗	if (pos >= reference_pos + match_length || reference_pos >= pos + match_length) {
130		✗	memcpy(history + pos, history + reference_pos, match_length);
131		✗	pos += match_length;
132			} else {
133		✗	while (match_length-- > 0)
134		✗	history[pos++] = history[reference_pos++];
135			}
136			} else {
137		✗	while (match_length-- > 0) {
138		✗	history[pos++] = history[reference_pos++];
139		✗	if (pos == HISTORY_SIZE) {
140		✗	bytestream2_put_buffer(pb, history, HISTORY_SIZE);
141		✗	pos = 0;
142			}
143		✗	reference_pos %= HISTORY_SIZE;
144			}
145			}
146			}
147
148		✗	bytestream2_put_buffer(pb, history, pos);
149
150		✗	return bytestream2_tell_p(pb);
151			}
152
153		✗	static int decode_blocks(AVCodecContext *avctx, AVFrame *p,
154			unsigned uncompressed_size)
155			{
156		✗	NotchLCContext *s = avctx->priv_data;
157		✗	GetByteContext rgb, dgb, *gb = &s->gb;
158			GetBitContext bit;
159			int ylinesize, ulinesize, vlinesize, alinesize;
160			uint16_t *dsty, *dstu, *dstv, *dsta;
161			int ret;
162
163		✗	s->texture_size_x = bytestream2_get_le32(gb);
164		✗	s->texture_size_y = bytestream2_get_le32(gb);
165
166		✗	ret = ff_set_dimensions(avctx, s->texture_size_x, s->texture_size_y);
167		✗	if (ret < 0)
168		✗	return ret;
169
170		✗	s->uv_offset_data_offset = bytestream2_get_le32(gb);
171		✗	if (s->uv_offset_data_offset >= UINT_MAX / 4)
172		✗	return AVERROR_INVALIDDATA;
173		✗	s->uv_offset_data_offset *= 4;
174		✗	if (s->uv_offset_data_offset >= uncompressed_size)
175		✗	return AVERROR_INVALIDDATA;
176
177		✗	s->y_control_data_offset = bytestream2_get_le32(gb);
178		✗	if (s->y_control_data_offset >= UINT_MAX / 4)
179		✗	return AVERROR_INVALIDDATA;
180		✗	s->y_control_data_offset *= 4;
181		✗	if (s->y_control_data_offset >= uncompressed_size)
182		✗	return AVERROR_INVALIDDATA;
183
184		✗	s->a_control_word_offset = bytestream2_get_le32(gb);
185		✗	if (s->a_control_word_offset >= UINT_MAX / 4)
186		✗	return AVERROR_INVALIDDATA;
187		✗	s->a_control_word_offset *= 4;
188		✗	if (s->a_control_word_offset >= uncompressed_size)
189		✗	return AVERROR_INVALIDDATA;
190
191		✗	s->uv_data_offset = bytestream2_get_le32(gb);
192		✗	if (s->uv_data_offset >= UINT_MAX / 4)
193		✗	return AVERROR_INVALIDDATA;
194		✗	s->uv_data_offset *= 4;
195		✗	if (s->uv_data_offset >= uncompressed_size)
196		✗	return AVERROR_INVALIDDATA;
197
198		✗	s->y_data_size = bytestream2_get_le32(gb);
199		✗	if (s->y_data_size >= UINT_MAX / 4)
200		✗	return AVERROR_INVALIDDATA;
201
202		✗	s->a_data_offset = bytestream2_get_le32(gb);
203		✗	if (s->a_data_offset >= UINT_MAX / 4)
204		✗	return AVERROR_INVALIDDATA;
205		✗	s->a_data_offset *= 4;
206		✗	if (s->a_data_offset >= uncompressed_size)
207		✗	return AVERROR_INVALIDDATA;
208
209		✗	s->a_count_size = bytestream2_get_le32(gb);
210		✗	if (s->a_count_size >= UINT_MAX / 4)
211		✗	return AVERROR_INVALIDDATA;
212		✗	s->a_count_size *= 4;
213		✗	if (s->a_count_size >= uncompressed_size)
214		✗	return AVERROR_INVALIDDATA;
215
216		✗	s->data_end = bytestream2_get_le32(gb);
217		✗	if (s->data_end > uncompressed_size)
218		✗	return AVERROR_INVALIDDATA;
219
220		✗	s->y_data_row_offsets = bytestream2_tell(gb);
221		✗	if (s->data_end <= s->y_data_size)
222		✗	return AVERROR_INVALIDDATA;
223		✗	s->y_data_offset = s->data_end - s->y_data_size;
224		✗	if (s->y_data_offset <= s->a_data_offset)
225		✗	return AVERROR_INVALIDDATA;
226		✗	s->uv_count_offset = s->y_data_offset - s->a_data_offset;
227
228		✗	if ((ret = ff_thread_get_buffer(avctx, p, 0)) < 0)
229		✗	return ret;
230
231		✗	rgb = *gb;
232		✗	dgb = *gb;
233		✗	bytestream2_seek(&rgb, s->y_data_row_offsets, SEEK_SET);
234		✗	bytestream2_seek(gb, s->y_control_data_offset, SEEK_SET);
235
236		✗	if (bytestream2_get_bytes_left(gb) < (avctx->height + 3) / 4 * ((avctx->width + 3) / 4) * 4)
237		✗	return AVERROR_INVALIDDATA;
238
239		✗	dsty = (uint16_t *)p->data[0];
240		✗	dsta = (uint16_t *)p->data[3];
241		✗	ylinesize = p->linesize[0] / 2;
242		✗	alinesize = p->linesize[3] / 2;
243
244		✗	for (int y = 0; y < avctx->height; y += 4) {
245		✗	const unsigned row_offset = bytestream2_get_le32(&rgb);
246
247		✗	bytestream2_seek(&dgb, s->y_data_offset + row_offset, SEEK_SET);
248
249		✗	ret = init_get_bits8(&bit, dgb.buffer, bytestream2_get_bytes_left(&dgb));
250		✗	if (ret < 0)
251		✗	return ret;
252		✗	for (int x = 0; x < avctx->width; x += 4) {
253		✗	unsigned item = bytestream2_get_le32(gb);
254		✗	unsigned y_min = item & 4095;
255		✗	unsigned y_max = (item >> 12) & 4095;
256		✗	unsigned y_diff = y_max - y_min;
257			unsigned control[4];
258
259		✗	control[0] = (item >> 24) & 3;
260		✗	control[1] = (item >> 26) & 3;
261		✗	control[2] = (item >> 28) & 3;
262		✗	control[3] = (item >> 30) & 3;
263
264		✗	for (int i = 0; i < 4; i++) {
265		✗	const int nb_bits = control[i] + 1;
266		✗	const int div = (1 << nb_bits) - 1;
267		✗	const int add = div - 1;
268
269		✗	dsty[x + i * ylinesize + 0] = av_clip_uintp2(y_min + ((y_diff * get_bits(&bit, nb_bits) + add) / div), 12);
270		✗	dsty[x + i * ylinesize + 1] = av_clip_uintp2(y_min + ((y_diff * get_bits(&bit, nb_bits) + add) / div), 12);
271		✗	dsty[x + i * ylinesize + 2] = av_clip_uintp2(y_min + ((y_diff * get_bits(&bit, nb_bits) + add) / div), 12);
272		✗	dsty[x + i * ylinesize + 3] = av_clip_uintp2(y_min + ((y_diff * get_bits(&bit, nb_bits) + add) / div), 12);
273			}
274			}
275
276		✗	dsty += 4 * ylinesize;
277			}
278
279		✗	rgb = *gb;
280		✗	dgb = *gb;
281		✗	bytestream2_seek(gb, s->a_control_word_offset, SEEK_SET);
282		✗	if (s->uv_count_offset == s->a_control_word_offset) {
283		✗	for (int y = 0; y < avctx->height; y++) {
284		✗	for (int x = 0; x < avctx->width; x++)
285		✗	dsta[x] = 4095;
286		✗	dsta += alinesize;
287			}
288			} else {
289		✗	if (bytestream2_get_bytes_left(gb) < (avctx->height + 15) / 16 * ((avctx->width + 15) / 16) * 8)
290		✗	return AVERROR_INVALIDDATA;
291
292		✗	for (int y = 0; y < avctx->height; y += 16) {
293		✗	for (int x = 0; x < avctx->width; x += 16) {
294		✗	unsigned m = bytestream2_get_le32(gb);
295		✗	unsigned offset = bytestream2_get_le32(gb);
296			unsigned alpha0, alpha1;
297			uint64_t control;
298
299		✗	if (offset >= UINT_MAX / 4)
300		✗	return AVERROR_INVALIDDATA;
301		✗	offset = offset * 4 + s->uv_data_offset + s->a_data_offset;
302		✗	if (offset >= s->data_end)
303		✗	return AVERROR_INVALIDDATA;
304
305		✗	bytestream2_seek(&dgb, offset, SEEK_SET);
306		✗	control = bytestream2_get_le64(&dgb);
307		✗	alpha0 = control & 0xFF;
308		✗	alpha1 = (control >> 8) & 0xFF;
309		✗	control = control >> 16;
310
311		✗	for (int by = 0; by < 4; by++) {
312		✗	for (int bx = 0; bx < 4; bx++) {
313		✗	switch (m & 3) {
314		✗	case 0:
315		✗	for (int i = 0; i < 4; i++) {
316		✗	for (int j = 0; j < 4; j++) {
317		✗	dsta[x + (i + by * 4) * alinesize + bx * 4 + j] = 0;
318			}
319			}
320		✗	break;
321		✗	case 1:
322		✗	for (int i = 0; i < 4; i++) {
323		✗	for (int j = 0; j < 4; j++) {
324		✗	dsta[x + (i + by * 4) * alinesize + bx * 4 + j] = 4095;
325			}
326			}
327		✗	break;
328		✗	case 2:
329		✗	for (int i = 0; i < 4; i++) {
330		✗	for (int j = 0; j < 4; j++) {
331		✗	dsta[x + (i + by * 4) * alinesize + bx * 4 + j] = (alpha0 + (alpha1 - alpha0) * (control & 7)) << 4;
332			}
333			}
334		✗	break;
335		✗	default:
336		✗	return AVERROR_INVALIDDATA;
337			}
338
339		✗	control >>= 3;
340		✗	m >>= 2;
341			}
342			}
343			}
344
345		✗	dsta += 16 * alinesize;
346			}
347			}
348
349		✗	bytestream2_seek(&rgb, s->uv_offset_data_offset, SEEK_SET);
350
351		✗	dstu = (uint16_t *)p->data[1];
352		✗	dstv = (uint16_t *)p->data[2];
353		✗	ulinesize = p->linesize[1] / 2;
354		✗	vlinesize = p->linesize[2] / 2;
355
356		✗	for (int y = 0; y < avctx->height; y += 16) {
357		✗	for (int x = 0; x < avctx->width; x += 16) {
358		✗	unsigned offset = bytestream2_get_le32(&rgb) * 4;
359		✗	int u[16][16] = { 0 }, v[16][16] = { 0 };
360			int u0, v0, u1, v1, udif, vdif;
361			unsigned escape, is8x8, loc;
362
363		✗	bytestream2_seek(&dgb, s->uv_data_offset + offset, SEEK_SET);
364
365		✗	is8x8 = bytestream2_get_le16(&dgb);
366		✗	escape = bytestream2_get_le16(&dgb);
367
368		✗	if (escape == 0 && is8x8 == 0) {
369		✗	u0 = bytestream2_get_byte(&dgb);
370		✗	v0 = bytestream2_get_byte(&dgb);
371		✗	u1 = bytestream2_get_byte(&dgb);
372		✗	v1 = bytestream2_get_byte(&dgb);
373		✗	loc = bytestream2_get_le32(&dgb);
374		✗	u0 = (u0 << 4) | (u0 & 0xF);
375		✗	v0 = (v0 << 4) | (v0 & 0xF);
376		✗	u1 = (u1 << 4) | (u1 & 0xF);
377		✗	v1 = (v1 << 4) | (v1 & 0xF);
378		✗	udif = u1 - u0;
379		✗	vdif = v1 - v0;
380
381		✗	for (int i = 0; i < 16; i += 4) {
382		✗	for (int j = 0; j < 16; j += 4) {
383		✗	for (int ii = 0; ii < 4; ii++) {
384		✗	for (int jj = 0; jj < 4; jj++) {
385		✗	u[i + ii][j + jj] = u0 + ((udif * (int)(loc & 3) + 2) / 3);
386		✗	v[i + ii][j + jj] = v0 + ((vdif * (int)(loc & 3) + 2) / 3);
387			}
388			}
389
390		✗	loc >>= 2;
391			}
392			}
393			} else {
394		✗	for (int i = 0; i < 16; i += 8) {
395		✗	for (int j = 0; j < 16; j += 8) {
396		✗	if (is8x8 & 1) {
397		✗	u0 = bytestream2_get_byte(&dgb);
398		✗	v0 = bytestream2_get_byte(&dgb);
399		✗	u1 = bytestream2_get_byte(&dgb);
400		✗	v1 = bytestream2_get_byte(&dgb);
401		✗	loc = bytestream2_get_le32(&dgb);
402		✗	u0 = (u0 << 4) | (u0 & 0xF);
403		✗	v0 = (v0 << 4) | (v0 & 0xF);
404		✗	u1 = (u1 << 4) | (u1 & 0xF);
405		✗	v1 = (v1 << 4) | (v1 & 0xF);
406		✗	udif = u1 - u0;
407		✗	vdif = v1 - v0;
408
409		✗	for (int ii = 0; ii < 8; ii += 2) {
410		✗	for (int jj = 0; jj < 8; jj += 2) {
411		✗	for (int iii = 0; iii < 2; iii++) {
412		✗	for (int jjj = 0; jjj < 2; jjj++) {
413		✗	u[i + ii + iii][j + jj + jjj] = u0 + ((udif * (int)(loc & 3) + 2) / 3);
414		✗	v[i + ii + iii][j + jj + jjj] = v0 + ((vdif * (int)(loc & 3) + 2) / 3);
415			}
416			}
417
418		✗	loc >>= 2;
419			}
420			}
421		✗	} else if (escape) {
422		✗	for (int ii = 0; ii < 8; ii += 4) {
423		✗	for (int jj = 0; jj < 8; jj += 4) {
424		✗	u0 = bytestream2_get_byte(&dgb);
425		✗	v0 = bytestream2_get_byte(&dgb);
426		✗	u1 = bytestream2_get_byte(&dgb);
427		✗	v1 = bytestream2_get_byte(&dgb);
428		✗	loc = bytestream2_get_le32(&dgb);
429		✗	u0 = (u0 << 4) | (u0 & 0xF);
430		✗	v0 = (v0 << 4) | (v0 & 0xF);
431		✗	u1 = (u1 << 4) | (u1 & 0xF);
432		✗	v1 = (v1 << 4) | (v1 & 0xF);
433		✗	udif = u1 - u0;
434		✗	vdif = v1 - v0;
435
436		✗	for (int iii = 0; iii < 4; iii++) {
437		✗	for (int jjj = 0; jjj < 4; jjj++) {
438		✗	u[i + ii + iii][j + jj + jjj] = u0 + ((udif * (int)(loc & 3) + 2) / 3);
439		✗	v[i + ii + iii][j + jj + jjj] = v0 + ((vdif * (int)(loc & 3) + 2) / 3);
440
441		✗	loc >>= 2;
442			}
443			}
444			}
445			}
446			}
447
448		✗	is8x8 >>= 1;
449			}
450			}
451			}
452
453		✗	for (int i = 0; i < 16; i++) {
454		✗	for (int j = 0; j < 16; j++) {
455		✗	dstu[x + i * ulinesize + j] = u[i][j];
456		✗	dstv[x + i * vlinesize + j] = v[i][j];
457			}
458			}
459			}
460
461		✗	dstu += 16 * ulinesize;
462		✗	dstv += 16 * vlinesize;
463			}
464
465		✗	return 0;
466			}
467
468		✗	static int decode_frame(AVCodecContext *avctx, AVFrame *p,
469			int *got_frame, AVPacket *avpkt)
470			{
471		✗	NotchLCContext *s = avctx->priv_data;
472		✗	GetByteContext *gb = &s->gb;
473		✗	PutByteContext *pb = &s->pb;
474			unsigned uncompressed_size;
475			int ret;
476
477		✗	if (avpkt->size <= 40)
478		✗	return AVERROR_INVALIDDATA;
479
480		✗	bytestream2_init(gb, avpkt->data, avpkt->size);
481
482		✗	if (bytestream2_get_le32(gb) != MKBETAG('N','L','C','1'))
483		✗	return AVERROR_INVALIDDATA;
484
485		✗	uncompressed_size = bytestream2_get_le32(gb);
486		✗	s->compressed_size = bytestream2_get_le32(gb);
487		✗	s->format = bytestream2_get_le32(gb);
488
489		✗	if (s->format > 2)
490		✗	return AVERROR_PATCHWELCOME;
491
492		✗	if (s->format == 0) {
493		✗	ret = ff_lzf_uncompress(gb, &s->lzf_buffer, &s->lzf_size);
494		✗	if (ret < 0)
495		✗	return ret;
496
497		✗	if (uncompressed_size > s->lzf_size)
498		✗	return AVERROR_INVALIDDATA;
499
500		✗	bytestream2_init(gb, s->lzf_buffer, uncompressed_size);
501		✗	} else if (s->format == 1) {
502		✗	if (bytestream2_get_bytes_left(gb) < uncompressed_size / 255)
503		✗	return AVERROR_INVALIDDATA;
504
505		✗	av_fast_padded_malloc(&s->uncompressed_buffer, &s->uncompressed_size,
506			uncompressed_size);
507		✗	if (!s->uncompressed_buffer)
508		✗	return AVERROR(ENOMEM);
509
510		✗	bytestream2_init_writer(pb, s->uncompressed_buffer, s->uncompressed_size);
511
512		✗	ret = lz4_decompress(avctx, gb, pb);
513		✗	if (ret != uncompressed_size)
514		✗	return AVERROR_INVALIDDATA;
515
516		✗	bytestream2_init(gb, s->uncompressed_buffer, uncompressed_size);
517			}
518
519		✗	ret = decode_blocks(avctx, p, uncompressed_size);
520		✗	if (ret < 0)
521		✗	return ret;
522
523		✗	*got_frame = 1;
524
525		✗	return avpkt->size;
526			}
527
528		✗	static av_cold int decode_end(AVCodecContext *avctx)
529			{
530		✗	NotchLCContext *s = avctx->priv_data;
531
532		✗	av_freep(&s->uncompressed_buffer);
533		✗	s->uncompressed_size = 0;
534		✗	av_freep(&s->lzf_buffer);
535		✗	s->lzf_size = 0;
536
537		✗	return 0;
538			}
539
540			const FFCodec ff_notchlc_decoder = {
541			.p.name = "notchlc",
542			CODEC_LONG_NAME("NotchLC"),
543			.p.type = AVMEDIA_TYPE_VIDEO,
544			.p.id = AV_CODEC_ID_NOTCHLC,
545			.priv_data_size = sizeof(NotchLCContext),
546			.init = decode_init,
547			.close = decode_end,
548			FF_CODEC_DECODE_CB(decode_frame),
549			.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
550			};
551