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