FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* AVS2-P2/IEEE1857.4 video parser.
3			* Copyright (c) 2018 Huiwen Ren <hwrenx@gmail.com>
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 "libavutil/avutil.h"
23			#include "avs2.h"
24			#include "get_bits.h"
25			#include "parser.h"
26
27		✗	static int avs2_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size)
28			{
29		✗	int pic_found = pc->frame_start_found;
30		✗	uint32_t state = pc->state;
31		✗	int cur = 0;
32
33		✗	if (!pic_found) {
34		✗	for (; cur < buf_size; ++cur) {
35		✗	state = (state << 8) | buf[cur];
36		✗	if ((state & 0xFFFFFF00) == 0x100 && AVS2_ISPIC(buf[cur])) {
37		✗	cur++;
38		✗	pic_found = 1;
39		✗	break;
40			}
41			}
42			}
43
44		✗	if (pic_found) {
45		✗	if (!buf_size)
46		✗	return END_NOT_FOUND;
47		✗	for (; cur < buf_size; cur++) {
48		✗	state = (state << 8) | buf[cur];
49		✗	if ((state & 0xFFFFFF00) == 0x100 && AVS2_ISUNIT(buf[cur])) {
50		✗	pc->frame_start_found = 0;
51		✗	pc->state = -1;
52		✗	return cur - 3;
53			}
54			}
55			}
56
57		✗	pc->frame_start_found = pic_found;
58		✗	pc->state = state;
59
60		✗	return END_NOT_FOUND;
61			}
62
63		✗	static void parse_avs2_seq_header(AVCodecParserContext *s, const uint8_t *buf,
64			int buf_size, AVCodecContext *avctx)
65			{
66			GetBitContext gb;
67			int profile, level;
68			int width, height;
69		✗	int chroma, sample_precision, encoding_precision = 1;
70			// sample_precision and encoding_precision is 3 bits
71			static const uint8_t precision[8] = { 0, 8, 10 };
72			unsigned aspect_ratio;
73			unsigned frame_rate_code;
74			int low_delay;
75			av_unused int ret;
76			// update buf_size_min if parse more deeper
77		✗	const int buf_size_min = 15;
78
79		✗	if (buf_size < buf_size_min)
80		✗	return;
81
82		✗	ret = init_get_bits8(&gb, buf, buf_size_min);
83			av_assert1(ret >= 0);
84
85		✗	s->key_frame = 1;
86		✗	s->pict_type = AV_PICTURE_TYPE_I;
87
88		✗	profile = get_bits(&gb, 8);
89		✗	level = get_bits(&gb, 8);
90
91			// progressive_sequence u(1)
92			// field_coded_sequence u(1)
93		✗	skip_bits(&gb, 2);
94
95		✗	width = get_bits(&gb, 14);
96		✗	height = get_bits(&gb, 14);
97
98		✗	chroma = get_bits(&gb, 2);
99		✗	sample_precision = get_bits(&gb, 3);
100		✗	if (profile == AVS2_PROFILE_MAIN10)
101		✗	encoding_precision = get_bits(&gb, 3);
102
103		✗	aspect_ratio = get_bits(&gb, 4);
104		✗	frame_rate_code = get_bits(&gb, 4);
105
106			// bit_rate_lower u(18)
107			// marker_bit f(1)
108			// bit_rate_upper u(12)
109		✗	skip_bits(&gb, 31);
110
111		✗	low_delay = get_bits(&gb, 1);
112
113		✗	s->width = width;
114		✗	s->height = height;
115		✗	s->coded_width = FFALIGN(width, 8);
116		✗	s->coded_height = FFALIGN(height, 8);
117		✗	avctx->framerate.num =
118		✗	ff_avs2_frame_rate_tab[frame_rate_code].num;
119		✗	avctx->framerate.den =
120		✗	ff_avs2_frame_rate_tab[frame_rate_code].den;
121		✗	avctx->has_b_frames = FFMAX(avctx->has_b_frames, !low_delay);
122
123		✗	av_log(avctx, AV_LOG_DEBUG,
124			"AVS2 parse seq HDR: profile %x, level %x, "
125			"width %d, height %d, "
126			"chroma %d, sample_precision %d bits, encoding_precision %d bits, "
127			"aspect_ratio 0x%x, framerate %d/%d, low_delay %d\n",
128			profile, level,
129			width, height,
130		✗	chroma, precision[sample_precision], precision[encoding_precision],
131			aspect_ratio, avctx->framerate.num, avctx->framerate.den, low_delay);
132			}
133
134		✗	static void parse_avs2_units(AVCodecParserContext *s, const uint8_t *buf,
135			int buf_size, AVCodecContext *avctx)
136			{
137		✗	if (buf_size < 5)
138		✗	return;
139
140		✗	if (!(buf[0] == 0x0 && buf[1] == 0x0 && buf[2] == 0x1))
141		✗	return;
142
143		✗	switch (buf[3]) {
144		✗	case AVS2_SEQ_START_CODE:
145		✗	parse_avs2_seq_header(s, buf + 4, buf_size - 4, avctx);
146		✗	return;
147		✗	case AVS2_INTRA_PIC_START_CODE:
148		✗	s->key_frame = 1;
149		✗	s->pict_type = AV_PICTURE_TYPE_I;
150		✗	return;
151		✗	case AVS2_INTER_PIC_START_CODE:
152		✗	s->key_frame = 0;
153		✗	if (buf_size > 9) {
154		✗	int pic_code_type = buf[8] & 0x3;
155		✗	if (pic_code_type == 1)
156		✗	s->pict_type = AV_PICTURE_TYPE_P;
157		✗	else if (pic_code_type == 3)
158		✗	s->pict_type = AV_PICTURE_TYPE_S;
159			else
160		✗	s->pict_type = AV_PICTURE_TYPE_B;
161			}
162		✗	return;
163			}
164			}
165
166		✗	static int avs2_parse(AVCodecParserContext *s, AVCodecContext *avctx,
167			const uint8_t **poutbuf, int *poutbuf_size,
168			const uint8_t *buf, int buf_size)
169			{
170		✗	ParseContext *pc = s->priv_data;
171			int next;
172
173		✗	if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
174		✗	next = buf_size;
175			} else {
176		✗	next = avs2_find_frame_end(pc, buf, buf_size);
177		✗	if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
178		✗	*poutbuf = NULL;
179		✗	*poutbuf_size = 0;
180		✗	return buf_size;
181			}
182			}
183
184		✗	parse_avs2_units(s, buf, buf_size, avctx);
185
186		✗	*poutbuf = buf;
187		✗	*poutbuf_size = buf_size;
188
189		✗	return next;
190			}
191
192			const AVCodecParser ff_avs2_parser = {
193			.codec_ids = { AV_CODEC_ID_AVS2 },
194			.priv_data_size = sizeof(ParseContext),
195			.parser_parse = avs2_parse,
196			.parser_close = ff_parse_close,
197			};
198