FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/bsf/hapqa_extract.c
Date: 2024-07-17 14:05:47
Exec Total Coverage
Lines: 33 43 76.7%
Functions: 2 2 100.0%
Branches: 16 24 66.7%

Line Branch Exec Source
1 /*
2 * HAPQA extract bitstream filter
3 * Copyright (c) 2017 Jokyo Images
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 * HAPQA extract bitstream filter
25 * extract one of the two textures of the HAQA
26 */
27
28 #include "bsf.h"
29 #include "bsf_internal.h"
30 #include "bytestream.h"
31 #include "hap.h"
32
33 #include "libavutil/opt.h"
34
35 typedef struct HapqaExtractContext {
36 const AVClass *class;
37 int texture;/* index of the texture to keep (0 for rgb or 1 for alpha) */
38 } HapqaExtractContext;
39
40 9 static int check_texture(HapqaExtractContext *ctx, int section_type) {
41
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9 if (((ctx->texture == 0)&&((section_type & 0x0F) == 0x0F)) || /* HapQ texture and rgb extract */
42
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6 ((ctx->texture == 1)&&((section_type & 0x0F) == 0x01))) /* HapAlphaOnly texture and alpha extract */
43 {
44 6 return 1; /* the texture is the one to keep */
45 } else {
46 3 return 0;
47 }
48 }
49
50 18 static int hapqa_extract(AVBSFContext *bsf, AVPacket *pkt)
51 {
52 18 HapqaExtractContext *ctx = bsf->priv_data;
53 GetByteContext gbc;
54 int section_size;
55 enum HapSectionType section_type;
56 int start_section_size;
57 18 int target_packet_size = 0;
58 18 int ret = 0;
59
60 18 ret = ff_bsf_get_packet_ref(bsf, pkt);
61
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18 if (ret < 0)
62 12 return ret;
63
64 6 bytestream2_init(&gbc, pkt->data, pkt->size);
65 6 ret = ff_hap_parse_section_header(&gbc, &section_size, &section_type);
66
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6 if (ret != 0)
67 goto fail;
68
69
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6 if ((section_type & 0x0F) != 0x0D) {
70 av_log(bsf, AV_LOG_ERROR, "Invalid section type for HAPQA %#04x.\n", section_type & 0x0F);
71 ret = AVERROR_INVALIDDATA;
72 goto fail;
73 }
74
75 6 start_section_size = 4;
76
77 6 bytestream2_seek(&gbc, start_section_size, SEEK_SET);/* go to start of the first texture */
78
79 6 ret = ff_hap_parse_section_header(&gbc, &section_size, &section_type);
80
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6 if (ret != 0)
81 goto fail;
82
83 6 target_packet_size = section_size + 4;
84
85
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6 if (check_texture(ctx, section_type) == 0) { /* the texture is not the one to keep */
86 3 start_section_size += 4 + section_size;
87 3 bytestream2_seek(&gbc, start_section_size, SEEK_SET);/* go to start of the second texture */
88 3 ret = ff_hap_parse_section_header(&gbc, &section_size, &section_type);
89
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3 if (ret != 0)
90 goto fail;
91
92 3 target_packet_size = section_size + 4;
93
94
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3 if (check_texture(ctx, section_type) == 0){ /* the second texture is not the one to keep */
95 av_log(bsf, AV_LOG_ERROR, "No valid texture found.\n");
96 ret = AVERROR_INVALIDDATA;
97 goto fail;
98 }
99 }
100
101 6 pkt->data += start_section_size;
102 6 pkt->size = target_packet_size;
103
104 6 fail:
105
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6 if (ret < 0)
106 av_packet_unref(pkt);
107 6 return ret;
108 }
109
110 static const enum AVCodecID codec_ids[] = {
111 AV_CODEC_ID_HAP, AV_CODEC_ID_NONE,
112 };
113
114 #define OFFSET(x) offsetof(HapqaExtractContext, x)
115 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_BSF_PARAM)
116 static const AVOption options[] = {
117 { "texture", "texture to keep", OFFSET(texture), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS, .unit = "texture" },
118 { "color", "keep HapQ texture", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, FLAGS, .unit = "texture" },
119 { "alpha", "keep HapAlphaOnly texture", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, FLAGS, .unit = "texture" },
120 { NULL },
121 };
122
123 static const AVClass hapqa_extract_class = {
124 .class_name = "hapqa_extract_bsf",
125 .item_name = av_default_item_name,
126 .option = options,
127 .version = LIBAVUTIL_VERSION_INT,
128 };
129
130 const FFBitStreamFilter ff_hapqa_extract_bsf = {
131 .p.name = "hapqa_extract",
132 .p.codec_ids = codec_ids,
133 .p.priv_class = &hapqa_extract_class,
134 .priv_data_size = sizeof(HapqaExtractContext),
135 .filter = hapqa_extract,
136 };
137