FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/imm5.c
Date: 2026-01-16 07:34:38
Exec Total Coverage
Lines: 0 81 0.0%
Functions: 0 4 0.0%
Branches: 0 34 0.0%
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1 /*
2 * Copyright (c) 2019 Paul B Mahol
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 "libavutil/attributes.h"
22 #include "libavutil/attributes_internal.h"
23 #include "libavutil/intreadwrite.h"
24
25 #include "avcodec.h"
26 #include "codec_internal.h"
27
28 typedef struct IMM5Context {
29 AVCodecContext *h264_avctx; // wrapper context for H264
30 AVCodecContext *hevc_avctx; // wrapper context for HEVC
31 } IMM5Context;
32
33 static const struct IMM5_unit {
34 uint8_t bits[14];
35 uint8_t len;
36 } IMM5_units[14] = {
37 { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x0B, 0x0F, 0x88 }, 12 },
38 { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x83, 0xE2 }, 12 },
39 { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x81, 0xE8, 0x80 }, 13 },
40 { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x0B, 0x04, 0xA2 }, 12 },
41 { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x81, 0x28, 0x80 }, 13 },
42 { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x80, 0x92, 0x20 }, 13 },
43 { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x0B, 0x0F, 0xC8 }, 13 },
44 { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x83, 0xF2 }, 13 },
45 { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x81, 0xEC, 0x80 }, 14 },
46 { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x0B, 0x04, 0xB2 }, 13 },
47 { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x81, 0x2C, 0x80 }, 14 },
48 { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x80, 0x93, 0x20 }, 14 },
49 { { 0x00, 0x00, 0x00, 0x01, 0x68, 0xDE, 0x3C, 0x80 }, 8 },
50 { { 0x00, 0x00, 0x00, 0x01, 0x68, 0xCE, 0x32, 0x28 }, 8 },
51 };
52
53 ✗ static av_cold int imm5_init(AVCodecContext *avctx)
54 {
55 ✗ IMM5Context *ctx = avctx->priv_data;
56 int ret;
57
58 EXTERN const FFCodec ff_h264_decoder;
59 ✗ ctx->h264_avctx = avcodec_alloc_context3(&ff_h264_decoder.p);
60 ✗ if (!ctx->h264_avctx)
61 ✗ return AVERROR(ENOMEM);
62 ✗ ctx->h264_avctx->thread_count = 1;
63 ✗ ctx->h264_avctx->flags = avctx->flags;
64 ✗ ctx->h264_avctx->flags2 = avctx->flags2;
65 ✗ ret = avcodec_open2(ctx->h264_avctx, NULL, NULL);
66 ✗ if (ret < 0)
67 ✗ return ret;
68
69 EXTERN const FFCodec ff_hevc_decoder;
70 ✗ ctx->hevc_avctx = avcodec_alloc_context3(&ff_hevc_decoder.p);
71 ✗ if (!ctx->hevc_avctx)
72 ✗ return AVERROR(ENOMEM);
73 ✗ ctx->hevc_avctx->thread_count = 1;
74 ✗ ctx->hevc_avctx->flags = avctx->flags;
75 ✗ ctx->hevc_avctx->flags2 = avctx->flags2;
76 ✗ ret = avcodec_open2(ctx->hevc_avctx, NULL, NULL);
77 ✗ if (ret < 0)
78 ✗ return ret;
79
80 ✗ return 0;
81 }
82
83 ✗ static int imm5_decode_frame(AVCodecContext *avctx, AVFrame *frame,
84 int *got_frame, AVPacket *avpkt)
85 {
86 ✗ IMM5Context *ctx = avctx->priv_data;
87 ✗ AVCodecContext *codec_avctx = ctx->h264_avctx;
88 int ret;
89
90 ✗ if (avpkt->size > 24 && avpkt->data[8] <= 1 && AV_RL32(avpkt->data + 4) + 24ULL <= avpkt->size) {
91 ✗ int codec_type = avpkt->data[1];
92 ✗ int index = avpkt->data[10];
93 ✗ int new_size = AV_RL32(avpkt->data + 4);
94 int offset, off;
95
96 ✗ if (codec_type == 0xA) {
97 ✗ codec_avctx = ctx->hevc_avctx;
98 ✗ } else if (index == 17) {
99 ✗ index = 4;
100 ✗ } else if (index == 18) {
101 ✗ index = 5;
102 }
103
104 ✗ if (index >= 1 && index <= 12) {
105 ✗ ret = av_packet_make_writable(avpkt);
106 ✗ if (ret < 0)
107 ✗ return ret;
108
109 ✗ index -= 1;
110 ✗ off = offset = IMM5_units[index].len;
111 ✗ if (codec_type == 2) {
112 ✗ offset += IMM5_units[12].len;
113 } else {
114 ✗ offset += IMM5_units[13].len;
115 }
116
117 ✗ avpkt->data += 24 - offset;
118 ✗ avpkt->size = new_size + offset;
119
120 ✗ memcpy(avpkt->data, IMM5_units[index].bits, IMM5_units[index].len);
121 ✗ if (codec_type == 2) {
122 ✗ memcpy(avpkt->data + off, IMM5_units[12].bits, IMM5_units[12].len);
123 } else {
124 ✗ memcpy(avpkt->data + off, IMM5_units[13].bits, IMM5_units[13].len);
125 }
126 } else {
127 ✗ avpkt->data += 24;
128 ✗ avpkt->size -= 24;
129 }
130 }
131
132 ✗ ret = avcodec_send_packet(codec_avctx, avpkt);
133 ✗ if (ret < 0) {
134 ✗ av_log(avctx, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
135 ✗ return ret;
136 }
137
138 ✗ ret = avcodec_receive_frame(codec_avctx, frame);
139 ✗ if (ret < 0)
140 ✗ return ret;
141
142 ✗ avctx->pix_fmt = codec_avctx->pix_fmt;
143 ✗ avctx->coded_width = codec_avctx->coded_width;
144 ✗ avctx->coded_height = codec_avctx->coded_height;
145 ✗ avctx->width = codec_avctx->width;
146 ✗ avctx->height = codec_avctx->height;
147 ✗ avctx->bit_rate = codec_avctx->bit_rate;
148 ✗ avctx->colorspace = codec_avctx->colorspace;
149 ✗ avctx->color_range = codec_avctx->color_range;
150 ✗ avctx->color_trc = codec_avctx->color_trc;
151 ✗ avctx->color_primaries = codec_avctx->color_primaries;
152 ✗ avctx->chroma_sample_location = codec_avctx->chroma_sample_location;
153
154 ✗ *got_frame = 1;
155
156 ✗ return avpkt->size;
157 }
158
159 ✗ static av_cold void imm5_flush(AVCodecContext *avctx)
160 {
161 ✗ IMM5Context *ctx = avctx->priv_data;
162
163 ✗ avcodec_flush_buffers(ctx->h264_avctx);
164 ✗ avcodec_flush_buffers(ctx->hevc_avctx);
165 ✗ }
166
167 ✗ static av_cold int imm5_close(AVCodecContext *avctx)
168 {
169 ✗ IMM5Context *ctx = avctx->priv_data;
170
171 ✗ avcodec_free_context(&ctx->h264_avctx);
172 ✗ avcodec_free_context(&ctx->hevc_avctx);
173
174 ✗ return 0;
175 }
176
177 const FFCodec ff_imm5_decoder = {
178 .p.name = "imm5",
179 CODEC_LONG_NAME("Infinity IMM5"),
180 .p.type = AVMEDIA_TYPE_VIDEO,
181 .p.id = AV_CODEC_ID_IMM5,
182 .init = imm5_init,
183 FF_CODEC_DECODE_CB(imm5_decode_frame),
184 .close = imm5_close,
185 .flush = imm5_flush,
186 .priv_data_size = sizeof(IMM5Context),
187 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
188 };
189