FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* GEM Raster image decoder
3			* Copyright (c) 2021 Peter Ross (pross@xvid.org)
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			/**
23			* @file
24			* GEM Raster image decoder
25			*/
26
27			#include "libavutil/mem.h"
28			#include "avcodec.h"
29			#include "bytestream.h"
30			#include "codec_internal.h"
31			#include "decode.h"
32
33			static const uint32_t gem_color_palette[16]={
34			0xFFFFFFFF, 0xFFFF0000, 0xFF00FF00, 0xFFFFFF00,
35			0xFF0000FF, 0xFFFF00FF, 0xFF00FFFF, 0xFFAEAEAE,
36			0xFF555555, 0xFFAE0000, 0xFF00AE00, 0xFFAEAE00,
37			0xFF0000AE, 0xFFAE00AE, 0xFF00AEAE, 0xFF000000,
38			};
39
40			static const uint8_t gem_gray[256]={
41			0xFF, 0x7F, 0xBF, 0x3F, 0xDF, 0x5F, 0x9F, 0x1F, 0xEF, 0x6F, 0xAF, 0x2F, 0xCF, 0x4F, 0x8F, 0x0F,
42			0xF7, 0x77, 0xB7, 0x37, 0xD7, 0x57, 0x97, 0x17, 0xE7, 0x67, 0xA7, 0x27, 0xC7, 0x47, 0x87, 0x07,
43			0xFB, 0x7B, 0xBB, 0x3B, 0xDB, 0x5B, 0x9B, 0x1B, 0xEB, 0x6B, 0xAB, 0x2B, 0xCB, 0x4B, 0x8B, 0x0B,
44			0xF3, 0x73, 0xB3, 0x33, 0xD3, 0x53, 0x93, 0x13, 0xE3, 0x63, 0xA3, 0x23, 0xC3, 0x43, 0x83, 0x03,
45			0xFD, 0x7D, 0xBD, 0x3D, 0xDD, 0x5D, 0x9D, 0x1D, 0xED, 0x6D, 0xAD, 0x2D, 0xCD, 0x4D, 0x8D, 0x0D,
46			0xF5, 0x75, 0xB5, 0x35, 0xD5, 0x55, 0x95, 0x15, 0xE5, 0x65, 0xA5, 0x25, 0xC5, 0x45, 0x85, 0x05,
47			0xF9, 0x79, 0xB9, 0x39, 0xD9, 0x59, 0x99, 0x19, 0xE9, 0x69, 0xA9, 0x29, 0xC9, 0x49, 0x89, 0x09,
48			0xF1, 0x71, 0xB1, 0x31, 0xD1, 0x51, 0x91, 0x11, 0xE1, 0x61, 0xA1, 0x21, 0xC1, 0x41, 0x81, 0x01,
49			0xFE, 0x7E, 0xBE, 0x3E, 0xDE, 0x5E, 0x9E, 0x1E, 0xEE, 0x6E, 0xAE, 0x2E, 0xCE, 0x4E, 0x8E, 0x0E,
50			0xF6, 0x76, 0xB6, 0x36, 0xD6, 0x56, 0x96, 0x16, 0xE6, 0x66, 0xA6, 0x26, 0xC6, 0x46, 0x86, 0x06,
51			0xFA, 0x7A, 0xBA, 0x3A, 0xDA, 0x5A, 0x9A, 0x1A, 0xEA, 0x6A, 0xAA, 0x2A, 0xCA, 0x4A, 0x8A, 0x0A,
52			0xF2, 0x72, 0xB2, 0x32, 0xD2, 0x52, 0x92, 0x12, 0xE2, 0x62, 0xA2, 0x22, 0xC2, 0x42, 0x82, 0x02,
53			0xFC, 0x7C, 0xBC, 0x3C, 0xDC, 0x5C, 0x9C, 0x1C, 0xEC, 0x6C, 0xAC, 0x2C, 0xCC, 0x4C, 0x8C, 0x0C,
54			0xF4, 0x74, 0xB4, 0x34, 0xD4, 0x54, 0x94, 0x14, 0xE4, 0x64, 0xA4, 0x24, 0xC4, 0x44, 0x84, 0x04,
55			0xF8, 0x78, 0xB8, 0x38, 0xD8, 0x58, 0x98, 0x18, 0xE8, 0x68, 0xA8, 0x28, 0xC8, 0x48, 0x88, 0x08,
56			0xF0, 0x70, 0xB0, 0x30, 0xD0, 0x50, 0x90, 0x10, 0xE0, 0x60, 0xA0, 0x20, 0xC0, 0x40, 0x80, 0x00,
57			};
58
59			typedef struct {
60			int y, pl, x, vdup;
61			} State;
62
63		✗	static void put_lines_bits(AVCodecContext *avctx, int planes, int row_width, int pixel_size, State * state, uint8_t * row, AVFrame *p)
64			{
65		✗	int pl_byte = state->pl / 8;
66		✗	int pl_bit = state->pl & 7;
67		✗	for (int y = 0; y < state->vdup && (state->y + y) < avctx->height; y++)
68		✗	for (int x = 0; x < row_width; x++)
69		✗	for (int i = 7; i >= 0 && x * 8 + 7 - i < avctx->width; i--)
70		✗	p->data[0][ (state->y + y) * p->linesize[0] + (x * 8 + 7 - i) * pixel_size + pl_byte] |= !!(row[x] & (1 << i)) << pl_bit;
71
72		✗	state->pl++;
73		✗	if (state->pl >= planes) {
74		✗	state->pl = 0;
75		✗	state->y += state->vdup;
76		✗	state->vdup = 1;
77			}
78		✗	}
79
80		✗	static void put_lines_bytes(AVCodecContext *avctx, int planes, int row_width, int pixel_size, State * state, uint8_t * row, AVFrame *p)
81			{
82		✗	for (int y = 0; y < state->vdup && (state->y + y) < avctx->height; y++)
83		✗	memcpy(p->data[0] + (state->y + y) * p->linesize[0], row, avctx->width * pixel_size);
84
85		✗	state->y += state->vdup;
86		✗	state->vdup = 1;
87		✗	}
88
89		✗	static int gem_decode_frame(AVCodecContext *avctx, AVFrame *p,
90			int *got_frame, AVPacket *avpkt)
91			{
92		✗	const uint8_t *buf = avpkt->data;
93		✗	int buf_size = avpkt->size;
94		✗	const uint8_t *buf_end = buf + buf_size;
95		✗	int header_size, planes, pattern_size, tag = 0, count_scalar = 1, ret;
96			unsigned int x, count, v;
97			GetByteContext gb;
98			uint32_t *palette;
99			const uint8_t * b;
100			uint8_t * row;
101			int row_width, pixel_size;
102		✗	State state = {.y = 0, .pl = 0, .x = 0, .vdup = 1};
103			void (*put_lines)(AVCodecContext *avctx, int planes, int row_width, int pixel_size, State * state, uint8_t * row, AVFrame *p);
104			int width, height;
105
106		✗	if (buf_size <= 16)
107		✗	return AVERROR_INVALIDDATA;
108
109		✗	bytestream2_init(&gb, buf + 2, buf_size - 2);
110		✗	header_size = bytestream2_get_be16(&gb);
111		✗	if (header_size < 8 || buf_size <= header_size * 2)
112		✗	return AVERROR_INVALIDDATA;
113
114		✗	planes = bytestream2_get_be16(&gb);
115		✗	pattern_size = bytestream2_get_be16(&gb);
116		✗	avctx->sample_aspect_ratio.num = bytestream2_get_be16(&gb);
117		✗	avctx->sample_aspect_ratio.den = bytestream2_get_be16(&gb);
118		✗	width = bytestream2_get_be16(&gb);
119		✗	height = bytestream2_get_be16(&gb);
120		✗	ret = ff_set_dimensions(avctx, width, height);
121		✗	if (ret < 0)
122		✗	return ret;
123
124		✗	row_width = (avctx->width + 7) / 8;
125		✗	put_lines = put_lines_bits;
126
127		✗	if (header_size == 9) {
128		✗	count_scalar = bytestream2_get_be16(&gb);
129		✗	if (count_scalar != 3) {
130		✗	avpriv_request_sample(avctx, "count_scalar=%d", count_scalar);
131		✗	return AVERROR_PATCHWELCOME;
132			}
133		✗	planes = 24;
134		✗	avctx->pix_fmt = AV_PIX_FMT_BGR24;
135		✗	pixel_size = 3;
136		✗	} else if (planes == 15) {
137			#if HAVE_BIGENDIAN
138			avctx->pix_fmt = AV_PIX_FMT_BGR555BE;
139			#else
140		✗	avctx->pix_fmt = AV_PIX_FMT_BGR555LE;
141			#endif
142		✗	pixel_size = 2;
143		✗	} else if (planes == 16) {
144		✗	avctx->pix_fmt = AV_PIX_FMT_RGB565BE;
145		✗	pixel_size = 2;
146		✗	} else if (planes == 24) {
147		✗	avctx->pix_fmt = AV_PIX_FMT_RGB24;
148		✗	pixel_size = 3;
149		✗	} else if (planes == 32) {
150		✗	avctx->pix_fmt = AV_PIX_FMT_0RGB;
151		✗	pixel_size = 4;
152			} else {
153		✗	avctx->pix_fmt = AV_PIX_FMT_PAL8;
154		✗	pixel_size = 1;
155			}
156
157		✗	if (header_size >= 11)
158		✗	tag = bytestream2_peek_be32(&gb);
159
160		✗	if (tag == AV_RB32("STTT")) {
161		✗	if (planes != 4) {
162		✗	avpriv_request_sample(avctx, "STTT planes=%d", planes);
163		✗	return AVERROR_PATCHWELCOME;
164			}
165		✗	} else if (tag == AV_RB32("TIMG")) {
166		✗	if (planes != 15) {
167		✗	avpriv_request_sample(avctx, "TIMG planes=%d", planes);
168		✗	return AVERROR_PATCHWELCOME;
169			}
170		✗	} else if (tag == AV_RB32("XIMG")) {
171		✗	if (planes != 1 && planes != 2 && planes != 4 && planes != 8 && planes != 16 && planes != 24 && planes != 32) {
172		✗	avpriv_request_sample(avctx, "XIMG planes=%d", planes);
173		✗	return AVERROR_PATCHWELCOME;
174			}
175		✗	} else if (planes != 1 && planes != 2 && planes != 3 && planes != 4 && planes != 8 && planes != 16 && planes != 24) {
176		✗	avpriv_request_sample(avctx, "planes=%d", planes);
177		✗	return AVERROR_PATCHWELCOME;
178			}
179
180		✗	if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
181		✗	return ret;
182
183		✗	p->pict_type = AV_PICTURE_TYPE_I;
184		✗	p->flags |= AV_FRAME_FLAG_KEY;
185			#if FF_API_PALETTE_HAS_CHANGED
186			FF_DISABLE_DEPRECATION_WARNINGS
187		✗	p->palette_has_changed = 1;
188			FF_ENABLE_DEPRECATION_WARNINGS
189			#endif
190		✗	palette = (uint32_t *)p->data[1];
191
192		✗	if (tag == AV_RB32("STTT")) {
193		✗	bytestream2_skip(&gb, 6);
194		✗	if (planes == 4) {
195		✗	for (int i = 0; i < (1 << planes); i++) {
196		✗	int v = bytestream2_get_be16(&gb);
197		✗	int r = ((v >> 8) & 0x7) << 5;
198		✗	int g = ((v >> 4) & 0x7) << 5;
199		✗	int b = ((v ) & 0x7) << 5;
200		✗	palette[i] = 0xFF000000 | r << 16 | g << 8 | b;
201			}
202			} else {
203		✗	av_assert0(0);
204			}
205		✗	} else if (tag == AV_RB32("TIMG")) {
206		✗	bytestream2_skip(&gb, 4);
207		✗	if (planes != 15) {
208		✗	av_assert0(0);
209			}
210		✗	} else if (tag == AV_RB32("XIMG")) {
211		✗	bytestream2_skip(&gb, 6);
212		✗	if (planes == 1 || planes == 2 || planes == 4 || planes == 8) {
213		✗	for (int i = 0; i < (1 << planes); i++) {
214		✗	int r = (bytestream2_get_be16(&gb) * 51 + 100) / 200;
215		✗	int g = (bytestream2_get_be16(&gb) * 51 + 100) / 200;
216		✗	int b = (bytestream2_get_be16(&gb) * 51 + 100) / 200;
217		✗	palette[i] = 0xFF000000 | r << 16 | g << 8 | b;
218			}
219		✗	} else if (planes == 16) {
220		✗	planes = 1;
221		✗	row_width = ((avctx->width + 7)/8)*8 * pixel_size;
222		✗	put_lines = put_lines_bytes;
223		✗	} else if (planes == 24) {
224		✗	planes = 1;
225		✗	row_width = ((avctx->width + 15)/16)*16 * pixel_size;
226		✗	put_lines = put_lines_bytes;
227		✗	} else if (planes == 32) {
228		✗	planes = 1;
229		✗	row_width = avctx->width * pixel_size;
230		✗	put_lines = put_lines_bytes;
231			} else {
232		✗	av_assert0(0);
233			}
234		✗	} else if (planes == 1) {
235		✗	palette[0] = 0xFFFFFFFF;
236		✗	palette[1] = 0xFF000000;
237		✗	} else if (planes == 2 || planes == 3 || planes == 4) {
238		✗	if (header_size == 9 + (1 << planes)) {
239		✗	bytestream2_skip(&gb, 2);
240		✗	for (int i = 0; i < (1 << planes); i++) {
241		✗	int v = bytestream2_get_be16(&gb);
242		✗	int r = ((v >> 8) & 0x7) << 5;
243		✗	int g = ((v >> 4) & 0x7) << 5;
244		✗	int b = ((v ) & 0x7) << 5;
245		✗	palette[i] = 0xFF000000 | r << 16 | g << 8 | b;
246			}
247			} else
248		✗	memcpy(palette, gem_color_palette, sizeof(gem_color_palette));
249		✗	} else if (planes == 8) {
250		✗	for (int i = 0; i < 256; i++)
251		✗	palette[i] = 0xFF000000 | (gem_gray[i]<<16) | (gem_gray[i]<<8) | gem_gray[i];
252		✗	} else if (planes == 16) {
253		✗	planes = 1;
254		✗	row_width = avctx->width * pixel_size;
255		✗	put_lines = put_lines_bytes;
256		✗	} else if (planes == 24) {
257		✗	planes = 1;
258		✗	row_width = avctx->width * pixel_size;
259		✗	put_lines = put_lines_bytes;
260			} else
261		✗	av_assert0(0);
262
263		✗	ret = av_reallocp_array(&avctx->priv_data, planes, row_width);
264		✗	if (ret < 0)
265		✗	return ret;
266		✗	row = avctx->priv_data;
267
268		✗	memset(p->data[0], 0, avctx->height * p->linesize[0]);
269		✗	b = buf + header_size * 2;
270		✗	x = 0;
271
272			#define SKIP \
273			do { \
274			x++; \
275			if (x >= row_width) { \
276			put_lines(avctx, planes, row_width, pixel_size, &state, row + state.pl * row_width, p); \
277			if (state.y >= avctx->height) goto abort; \
278			x = 0; \
279			} \
280			} while(0)
281
282			#define PUT(v) \
283			do { \
284			row[state.pl * row_width + x++] = v; \
285			if (x >= row_width) { \
286			put_lines(avctx, planes, row_width, pixel_size, &state, row + state.pl * row_width, p); \
287			if (state.y >= avctx->height) goto abort; \
288			x = 0; \
289			} \
290			} while(0)
291
292		✗	while(b < buf_end) {
293		✗	int opcode = *b++;
294		✗	if (opcode == 0x80) { /* copy */
295		✗	if (b >= buf_end)
296		✗	goto abort;
297		✗	count = *b++;
298		✗	if (!count)
299		✗	count = 256;
300		✗	count *= count_scalar;
301		✗	for (int j = 0; j < count; j++) {
302		✗	if (b >= buf_end)
303		✗	goto abort;
304		✗	PUT(*b++);
305			}
306		✗	} else if (opcode) { /* run */
307		✗	count = opcode & 0x7f;
308		✗	if (!count)
309		✗	count = 256;
310		✗	count *= count_scalar;
311		✗	v = opcode & 0x80 ? 0xFF : 0x00;
312		✗	for (int i = 0; i < count; i++)
313		✗	PUT(v);
314			} else {
315		✗	if (b >= buf_end)
316		✗	goto abort;
317		✗	count = *b++;
318		✗	if (count) { /* pattern */
319		✗	if (b > buf_end - pattern_size)
320		✗	goto abort;
321
322		✗	count *= count_scalar;
323		✗	for (int j = 0; j < count; j++)
324		✗	for (int k = 0; k < pattern_size; k++)
325		✗	PUT(b[k]);
326
327		✗	b += pattern_size;
328			} else {
329		✗	if (b >= buf_end)
330		✗	goto abort;
331		✗	count = *b++;
332		✗	if (count == 0xFF) { /* vertical duplication */
333		✗	if (b >= buf_end)
334		✗	goto abort;
335		✗	state.vdup = *b++;
336		✗	if (!state.vdup)
337		✗	state.vdup = 256;
338			} else { /* horizontal duplication */
339		✗	for (int i = 0; i < count + 1; i++)
340		✗	SKIP;
341			}
342			}
343			}
344			}
345
346		✗	abort:
347
348		✗	*got_frame = 1;
349		✗	return buf_size;
350			}
351
352		✗	static av_cold int gem_close(AVCodecContext *avctx)
353			{
354		✗	av_freep(&avctx->priv_data);
355		✗	return 0;
356			}
357
358			const FFCodec ff_gem_decoder = {
359			.p.name = "gem",
360			CODEC_LONG_NAME("GEM Raster image"),
361			.p.type = AVMEDIA_TYPE_VIDEO,
362			.p.id = AV_CODEC_ID_GEM,
363			.p.capabilities = AV_CODEC_CAP_DR1,
364			FF_CODEC_DECODE_CB(gem_decode_frame),
365			.close = gem_close,
366			};
367