FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/av1_parse.c
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 38 45 84.4%
Branches: 12 20 60.0%

Line Branch Exec Source
1 /*
2 * AV1 common parsing code
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "config.h"
22
23 #include "libavutil/mem.h"
24
25 #include "av1.h"
26 #include "av1_parse.h"
27 #include "bytestream.h"
28
29 76 int ff_av1_extract_obu(AV1OBU *obu, const uint8_t *buf, int length, void *logctx)
30 {
31 int64_t obu_size;
32 int start_pos, type, temporal_id, spatial_id;
33 int len;
34
35 76 len = parse_obu_header(buf, length, &obu_size, &start_pos,
36 &type, &temporal_id, &spatial_id);
37
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76 if (len < 0)
38 return len;
39
40 76 obu->type = type;
41 76 obu->temporal_id = temporal_id;
42 76 obu->spatial_id = spatial_id;
43
44 76 obu->data = buf + start_pos;
45 76 obu->size = obu_size;
46 76 obu->raw_data = buf;
47 76 obu->raw_size = len;
48
49 76 av_log(logctx, AV_LOG_DEBUG,
50 "obu_type: %d, temporal_id: %d, spatial_id: %d, payload size: %d\n",
51 obu->type, obu->temporal_id, obu->spatial_id, obu->size);
52
53 76 return len;
54 }
55
56 19 int ff_av1_packet_split(AV1Packet *pkt, const uint8_t *buf, int length, void *logctx)
57 {
58 GetByteContext bc;
59 int ret, consumed;
60
61 19 bytestream2_init(&bc, buf, length);
62 19 pkt->nb_obus = 0;
63
64
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95 while (bytestream2_get_bytes_left(&bc) > 0) {
65 AV1OBU *obu;
66
67
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76 if (pkt->obus_allocated < pkt->nb_obus + 1) {
68 76 int new_size = pkt->obus_allocated + 1;
69 AV1OBU *tmp;
70
71
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76 if (new_size >= INT_MAX / sizeof(*tmp))
72 return AVERROR(ENOMEM);
73 76 tmp = av_fast_realloc(pkt->obus, &pkt->obus_allocated_size, new_size * sizeof(*tmp));
74
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76 if (!tmp)
75 return AVERROR(ENOMEM);
76
77 76 pkt->obus = tmp;
78 76 memset(pkt->obus + pkt->obus_allocated, 0, sizeof(*pkt->obus));
79 76 pkt->obus_allocated = new_size;
80 }
81 76 obu = &pkt->obus[pkt->nb_obus];
82
83 76 consumed = ff_av1_extract_obu(obu, bc.buffer, bytestream2_get_bytes_left(&bc), logctx);
84
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76 if (consumed < 0)
85 return consumed;
86
87 76 bytestream2_skip(&bc, consumed);
88
89 76 obu->size_bits = get_obu_bit_length(obu->data, obu->size, obu->type);
90
91
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76 if (obu->size_bits < 0 || (!obu->size_bits && obu->type != AV1_OBU_TEMPORAL_DELIMITER)) {
92 av_log(logctx, AV_LOG_ERROR, "Invalid OBU of type %d, skipping.\n", obu->type);
93 continue;
94 }
95
96 76 pkt->nb_obus++;
97
98 76 ret = init_get_bits(&obu->gb, obu->data, obu->size_bits);
99
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76 if (ret < 0)
100 return ret;
101 }
102
103 19 return 0;
104 }
105
106 676 void ff_av1_packet_uninit(AV1Packet *pkt)
107 {
108 676 av_freep(&pkt->obus);
109 676 pkt->obus_allocated = pkt->obus_allocated_size = 0;
110 676 }
111