FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* This file is part of FFmpeg.
3			*
4			* FFmpeg is free software; you can redistribute it and/or
5			* modify it under the terms of the GNU Lesser General Public
6			* License as published by the Free Software Foundation; either
7			* version 2.1 of the License, or (at your option) any later version.
8			*
9			* FFmpeg is distributed in the hope that it will be useful,
10			* but WITHOUT ANY WARRANTY; without even the implied warranty of
11			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12			* Lesser General Public License for more details.
13			*
14			* You should have received a copy of the GNU Lesser General Public
15			* License along with FFmpeg; if not, write to the Free Software
16			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17			*/
18
19			#include "libavutil/mem.h"
20			#include "cbs.h"
21			#include "cbs_internal.h"
22			#include "cbs_jpeg.h"
23
24
25			#define HEADER(name) do { \
26			ff_cbs_trace_header(ctx, name); \
27			} while (0)
28
29			#define CHECK(call) do { \
30			err = (call); \
31			if (err < 0) \
32			return err; \
33			} while (0)
34
35			#define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
36
37			#define u(width, name, range_min, range_max) \
38			xu(width, name, range_min, range_max, 0, )
39			#define us(width, name, sub, range_min, range_max) \
40			xu(width, name, range_min, range_max, 1, sub)
41
42
43			#define READ
44			#define READWRITE read
45			#define RWContext GetBitContext
46			#define FUNC(name) cbs_jpeg_read_ ## name
47
48			#define xu(width, name, range_min, range_max, subs, ...) do { \
49			uint32_t value; \
50			CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
51			SUBSCRIPTS(subs, __VA_ARGS__), \
52			&value, range_min, range_max)); \
53			current->name = value; \
54			} while (0)
55
56			#include "cbs_jpeg_syntax_template.c"
57
58			#undef READ
59			#undef READWRITE
60			#undef RWContext
61			#undef FUNC
62			#undef xu
63
64			#define WRITE
65			#define READWRITE write
66			#define RWContext PutBitContext
67			#define FUNC(name) cbs_jpeg_write_ ## name
68
69			#define xu(width, name, range_min, range_max, subs, ...) do { \
70			uint32_t value = current->name; \
71			CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
72			SUBSCRIPTS(subs, __VA_ARGS__), \
73			value, range_min, range_max)); \
74			} while (0)
75
76
77			#include "cbs_jpeg_syntax_template.c"
78
79			#undef WRITE
80			#undef READWRITE
81			#undef RWContext
82			#undef FUNC
83			#undef xu
84
85
86		✗	static int cbs_jpeg_split_fragment(CodedBitstreamContext *ctx,
87			CodedBitstreamFragment *frag,
88			int header)
89			{
90			AVBufferRef *data_ref;
91			uint8_t *data;
92			size_t data_size;
93			int start, end, marker, next_start, next_marker;
94			int err, i, j, length;
95
96		✗	if (frag->data_size < 4) {
97			// Definitely too short to be meaningful.
98		✗	return AVERROR_INVALIDDATA;
99			}
100
101		✗	for (i = 0; i + 1 < frag->data_size && frag->data[i] != 0xff; i++);
102		✗	if (i > 0) {
103		✗	av_log(ctx->log_ctx, AV_LOG_WARNING, "Discarding %d bytes at "
104			"beginning of image.\n", i);
105			}
106		✗	for (++i; i + 1 < frag->data_size && frag->data[i] == 0xff; i++);
107		✗	if (i + 1 >= frag->data_size && frag->data[i]) {
108		✗	av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid JPEG image: "
109			"no SOI marker found.\n");
110		✗	return AVERROR_INVALIDDATA;
111			}
112		✗	marker = frag->data[i];
113		✗	if (marker != JPEG_MARKER_SOI) {
114		✗	av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid JPEG image: first "
115			"marker is %02x, should be SOI.\n", marker);
116		✗	return AVERROR_INVALIDDATA;
117			}
118		✗	for (++i; i + 1 < frag->data_size && frag->data[i] == 0xff; i++);
119		✗	if (i + 1 >= frag->data_size) {
120		✗	av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid JPEG image: "
121			"no image content found.\n");
122		✗	return AVERROR_INVALIDDATA;
123			}
124		✗	marker = frag->data[i];
125		✗	start = i + 1;
126
127			do {
128		✗	if (marker == JPEG_MARKER_EOI) {
129		✗	break;
130		✗	} else if (marker == JPEG_MARKER_SOS) {
131		✗	next_marker = -1;
132		✗	end = start;
133		✗	for (i = start; i + 1 < frag->data_size; i++) {
134		✗	if (frag->data[i] != 0xff)
135		✗	continue;
136		✗	end = i;
137		✗	for (++i; i + 1 < frag->data_size &&
138		✗	frag->data[i] == 0xff; i++);
139		✗	if (i + 1 < frag->data_size) {
140		✗	if (frag->data[i] == 0x00)
141		✗	continue;
142		✗	next_marker = frag->data[i];
143		✗	next_start = i + 1;
144			}
145		✗	break;
146			}
147			} else {
148		✗	i = start;
149		✗	if (i > frag->data_size - 2) {
150		✗	av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid JPEG image: "
151			"truncated at %02x marker.\n", marker);
152		✗	return AVERROR_INVALIDDATA;
153			}
154		✗	length = AV_RB16(frag->data + i);
155		✗	if (length > frag->data_size - i) {
156		✗	av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid JPEG image: "
157			"truncated at %02x marker segment.\n", marker);
158		✗	return AVERROR_INVALIDDATA;
159			}
160		✗	end = start + length;
161
162		✗	i = end;
163		✗	if (frag->data[i] != 0xff) {
164		✗	next_marker = -1;
165			} else {
166		✗	for (++i; i + 1 < frag->data_size &&
167		✗	frag->data[i] == 0xff; i++);
168		✗	if (i + 1 >= frag->data_size) {
169		✗	next_marker = -1;
170			} else {
171		✗	next_marker = frag->data[i];
172		✗	next_start = i + 1;
173			}
174			}
175			}
176
177		✗	if (marker == JPEG_MARKER_SOS) {
178		✗	length = AV_RB16(frag->data + start);
179
180		✗	if (length > end - start)
181		✗	return AVERROR_INVALIDDATA;
182
183		✗	data_ref = NULL;
184		✗	data = av_malloc(end - start +
185			AV_INPUT_BUFFER_PADDING_SIZE);
186		✗	if (!data)
187		✗	return AVERROR(ENOMEM);
188
189		✗	memcpy(data, frag->data + start, length);
190		✗	for (i = start + length, j = length; i < end; i++, j++) {
191		✗	if (frag->data[i] == 0xff) {
192		✗	while (frag->data[i] == 0xff)
193		✗	++i;
194		✗	data[j] = 0xff;
195			} else {
196		✗	data[j] = frag->data[i];
197			}
198			}
199		✗	data_size = j;
200
201		✗	memset(data + data_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
202
203			} else {
204		✗	data = frag->data + start;
205		✗	data_size = end - start;
206		✗	data_ref = frag->data_ref;
207			}
208
209		✗	err = ff_cbs_append_unit_data(frag, marker,
210			data, data_size, data_ref);
211		✗	if (err < 0)
212		✗	return err;
213
214		✗	marker = next_marker;
215		✗	start = next_start;
216		✗	} while (next_marker != -1);
217
218		✗	return 0;
219			}
220
221		✗	static int cbs_jpeg_read_unit(CodedBitstreamContext *ctx,
222			CodedBitstreamUnit *unit)
223			{
224			GetBitContext gbc;
225			int err;
226
227		✗	err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
228		✗	if (err < 0)
229		✗	return err;
230
231		✗	err = ff_cbs_alloc_unit_content(ctx, unit);
232		✗	if (err < 0)
233		✗	return err;
234
235		✗	if (unit->type >= JPEG_MARKER_SOF0 &&
236		✗	unit->type <= JPEG_MARKER_SOF3) {
237		✗	err = cbs_jpeg_read_frame_header(ctx, &gbc, unit->content);
238		✗	if (err < 0)
239		✗	return err;
240
241		✗	} else if (unit->type >= JPEG_MARKER_APPN &&
242		✗	unit->type <= JPEG_MARKER_APPN + 15) {
243		✗	err = cbs_jpeg_read_application_data(ctx, &gbc, unit->content);
244		✗	if (err < 0)
245		✗	return err;
246
247		✗	} else if (unit->type == JPEG_MARKER_SOS) {
248		✗	JPEGRawScan *scan = unit->content;
249			int pos;
250
251		✗	err = cbs_jpeg_read_scan_header(ctx, &gbc, &scan->header);
252		✗	if (err < 0)
253		✗	return err;
254
255		✗	pos = get_bits_count(&gbc);
256		✗	av_assert0(pos % 8 == 0);
257		✗	if (pos > 0) {
258		✗	scan->data_size = unit->data_size - pos / 8;
259		✗	scan->data_ref = av_buffer_ref(unit->data_ref);
260		✗	if (!scan->data_ref)
261		✗	return AVERROR(ENOMEM);
262		✗	scan->data = unit->data + pos / 8;
263			}
264
265			} else {
266		✗	switch (unit->type) {
267			#define SEGMENT(marker, func) \
268			case JPEG_MARKER_ ## marker: \
269			{ \
270			err = cbs_jpeg_read_ ## func(ctx, &gbc, unit->content); \
271			if (err < 0) \
272			return err; \
273			} \
274			break
275		✗	SEGMENT(DQT, dqt);
276		✗	SEGMENT(DHT, dht);
277		✗	SEGMENT(COM, comment);
278			#undef SEGMENT
279		✗	default:
280		✗	return AVERROR(ENOSYS);
281			}
282			}
283
284		✗	return 0;
285			}
286
287		✗	static int cbs_jpeg_write_scan(CodedBitstreamContext *ctx,
288			CodedBitstreamUnit *unit,
289			PutBitContext *pbc)
290			{
291		✗	JPEGRawScan *scan = unit->content;
292			int err;
293
294		✗	err = cbs_jpeg_write_scan_header(ctx, pbc, &scan->header);
295		✗	if (err < 0)
296		✗	return err;
297
298		✗	if (scan->data) {
299		✗	if (scan->data_size * 8 > put_bits_left(pbc))
300		✗	return AVERROR(ENOSPC);
301
302		✗	av_assert0(put_bits_count(pbc) % 8 == 0);
303
304		✗	flush_put_bits(pbc);
305
306		✗	memcpy(put_bits_ptr(pbc), scan->data, scan->data_size);
307		✗	skip_put_bytes(pbc, scan->data_size);
308			}
309
310		✗	return 0;
311			}
312
313		✗	static int cbs_jpeg_write_segment(CodedBitstreamContext *ctx,
314			CodedBitstreamUnit *unit,
315			PutBitContext *pbc)
316			{
317			int err;
318
319		✗	if (unit->type >= JPEG_MARKER_SOF0 &&
320		✗	unit->type <= JPEG_MARKER_SOF3) {
321		✗	err = cbs_jpeg_write_frame_header(ctx, pbc, unit->content);
322		✗	} else if (unit->type >= JPEG_MARKER_APPN &&
323		✗	unit->type <= JPEG_MARKER_APPN + 15) {
324		✗	err = cbs_jpeg_write_application_data(ctx, pbc, unit->content);
325			} else {
326		✗	switch (unit->type) {
327			#define SEGMENT(marker, func) \
328			case JPEG_MARKER_ ## marker: \
329			err = cbs_jpeg_write_ ## func(ctx, pbc, unit->content); \
330			break;
331		✗	SEGMENT(DQT, dqt);
332		✗	SEGMENT(DHT, dht);
333		✗	SEGMENT(COM, comment);
334		✗	default:
335		✗	return AVERROR_PATCHWELCOME;
336			}
337			}
338
339		✗	return err;
340			}
341
342		✗	static int cbs_jpeg_write_unit(CodedBitstreamContext *ctx,
343			CodedBitstreamUnit *unit,
344			PutBitContext *pbc)
345			{
346		✗	if (unit->type == JPEG_MARKER_SOS)
347		✗	return cbs_jpeg_write_scan (ctx, unit, pbc);
348			else
349		✗	return cbs_jpeg_write_segment(ctx, unit, pbc);
350			}
351
352		✗	static int cbs_jpeg_assemble_fragment(CodedBitstreamContext *ctx,
353			CodedBitstreamFragment *frag)
354			{
355			const CodedBitstreamUnit *unit;
356			uint8_t *data;
357			size_t size, dp, sp;
358			int i;
359
360		✗	size = 4; // SOI + EOI.
361		✗	for (i = 0; i < frag->nb_units; i++) {
362		✗	unit = &frag->units[i];
363		✗	size += 2 + unit->data_size;
364		✗	if (unit->type == JPEG_MARKER_SOS) {
365		✗	for (sp = 0; sp < unit->data_size; sp++) {
366		✗	if (unit->data[sp] == 0xff)
367		✗	++size;
368			}
369			}
370			}
371
372		✗	frag->data_ref = av_buffer_alloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
373		✗	if (!frag->data_ref)
374		✗	return AVERROR(ENOMEM);
375		✗	data = frag->data_ref->data;
376
377		✗	dp = 0;
378
379		✗	data[dp++] = 0xff;
380		✗	data[dp++] = JPEG_MARKER_SOI;
381
382		✗	for (i = 0; i < frag->nb_units; i++) {
383		✗	unit = &frag->units[i];
384
385		✗	data[dp++] = 0xff;
386		✗	data[dp++] = unit->type;
387
388		✗	if (unit->type != JPEG_MARKER_SOS) {
389		✗	memcpy(data + dp, unit->data, unit->data_size);
390		✗	dp += unit->data_size;
391			} else {
392		✗	sp = AV_RB16(unit->data);
393		✗	av_assert0(sp <= unit->data_size);
394		✗	memcpy(data + dp, unit->data, sp);
395		✗	dp += sp;
396
397		✗	for (; sp < unit->data_size; sp++) {
398		✗	if (unit->data[sp] == 0xff) {
399		✗	data[dp++] = 0xff;
400		✗	data[dp++] = 0x00;
401			} else {
402		✗	data[dp++] = unit->data[sp];
403			}
404			}
405			}
406			}
407
408		✗	data[dp++] = 0xff;
409		✗	data[dp++] = JPEG_MARKER_EOI;
410
411		✗	av_assert0(dp == size);
412
413		✗	memset(data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
414		✗	frag->data = data;
415		✗	frag->data_size = size;
416
417		✗	return 0;
418			}
419
420			static const CodedBitstreamUnitTypeDescriptor cbs_jpeg_unit_types[] = {
421			CBS_UNIT_RANGE_POD(JPEG_MARKER_SOF0, JPEG_MARKER_SOF3, JPEGRawFrameHeader),
422
423			CBS_UNIT_RANGE_INTERNAL_REF(JPEG_MARKER_APPN, JPEG_MARKER_APPN + 15,
424			JPEGRawApplicationData, Ap),
425
426			CBS_UNIT_TYPE_INTERNAL_REF(JPEG_MARKER_SOS, JPEGRawScan, data),
427
428			CBS_UNIT_TYPE_POD(JPEG_MARKER_DQT, JPEGRawQuantisationTableSpecification),
429			CBS_UNIT_TYPE_POD(JPEG_MARKER_DHT, JPEGRawHuffmanTableSpecification),
430
431			CBS_UNIT_TYPE_INTERNAL_REF(JPEG_MARKER_COM, JPEGRawComment, Cm),
432
433			CBS_UNIT_TYPE_END_OF_LIST
434			};
435
436			const CodedBitstreamType ff_cbs_type_jpeg = {
437			.codec_id = AV_CODEC_ID_MJPEG,
438
439			.unit_types = cbs_jpeg_unit_types,
440
441			.split_fragment = &cbs_jpeg_split_fragment,
442			.read_unit = &cbs_jpeg_read_unit,
443			.write_unit = &cbs_jpeg_write_unit,
444			.assemble_fragment = &cbs_jpeg_assemble_fragment,
445			};
446