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