FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/imm5.c
Date: 2026-08-27 03:59:31
Exec Total Coverage
Lines: 0 85 0.0%
Functions: 0 4 0.0%
Branches: 0 36 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 ✗ ctx->h264_avctx->max_pixels = avctx->max_pixels;
66 ✗ ret = avcodec_open2(ctx->h264_avctx, NULL, NULL);
67 ✗ if (ret < 0)
68 ✗ return ret;
69
70 EXTERN const FFCodec ff_hevc_decoder;
71 ✗ ctx->hevc_avctx = avcodec_alloc_context3(&ff_hevc_decoder.p);
72 ✗ if (!ctx->hevc_avctx)
73 ✗ return AVERROR(ENOMEM);
74 ✗ ctx->hevc_avctx->thread_count = 1;
75 ✗ ctx->hevc_avctx->flags = avctx->flags;
76 ✗ ctx->hevc_avctx->flags2 = avctx->flags2;
77 ✗ ctx->hevc_avctx->max_pixels = avctx->max_pixels;
78 ✗ ret = avcodec_open2(ctx->hevc_avctx, NULL, NULL);
79 ✗ if (ret < 0)
80 ✗ return ret;
81
82 ✗ return 0;
83 }
84
85 ✗ static int imm5_decode_frame(AVCodecContext *avctx, AVFrame *frame,
86 int *got_frame, AVPacket *avpkt)
87 {
88 ✗ IMM5Context *ctx = avctx->priv_data;
89 ✗ AVCodecContext *codec_avctx = ctx->h264_avctx;
90 int ret;
91
92 ✗ if (avpkt->size > 24 && avpkt->data[8] <= 1 && AV_RL32(avpkt->data + 4) + 24ULL <= avpkt->size) {
93 ✗ int codec_type = avpkt->data[1];
94 ✗ int index = avpkt->data[10];
95 ✗ int new_size = AV_RL32(avpkt->data + 4);
96 int offset, off;
97
98 ✗ if (codec_type == 0xA) {
99 ✗ codec_avctx = ctx->hevc_avctx;
100 ✗ } else if (index == 17) {
101 ✗ index = 4;
102 ✗ } else if (index == 18) {
103 ✗ index = 5;
104 }
105
106 ✗ if (index >= 1 && index <= 12) {
107 ✗ ret = av_packet_make_writable(avpkt);
108 ✗ if (ret < 0)
109 ✗ return ret;
110
111 ✗ index -= 1;
112 ✗ off = offset = IMM5_units[index].len;
113 ✗ if (codec_type == 2) {
114 ✗ offset += IMM5_units[12].len;
115 } else {
116 ✗ offset += IMM5_units[13].len;
117 }
118
119 ✗ avpkt->data += 24 - offset;
120 ✗ avpkt->size = new_size + offset;
121
122 ✗ memcpy(avpkt->data, IMM5_units[index].bits, IMM5_units[index].len);
123 ✗ if (codec_type == 2) {
124 ✗ memcpy(avpkt->data + off, IMM5_units[12].bits, IMM5_units[12].len);
125 } else {
126 ✗ memcpy(avpkt->data + off, IMM5_units[13].bits, IMM5_units[13].len);
127 }
128 } else {
129 ✗ avpkt->data += 24;
130 ✗ avpkt->size -= 24;
131 }
132 }
133
134 ✗ ret = avcodec_send_packet(codec_avctx, avpkt);
135 ✗ if (ret < 0) {
136 ✗ av_log(avctx, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
137 ✗ return ret;
138 }
139
140 ✗ ret = avcodec_receive_frame(codec_avctx, frame);
141 ✗ if (ret == AVERROR(EAGAIN))
142 ✗ return avpkt->size;
143 ✗ if (ret < 0)
144 ✗ return ret;
145
146 ✗ avctx->pix_fmt = codec_avctx->pix_fmt;
147 ✗ avctx->coded_width = codec_avctx->coded_width;
148 ✗ avctx->coded_height = codec_avctx->coded_height;
149 ✗ avctx->width = codec_avctx->width;
150 ✗ avctx->height = codec_avctx->height;
151 ✗ avctx->bit_rate = codec_avctx->bit_rate;
152 ✗ avctx->colorspace = codec_avctx->colorspace;
153 ✗ avctx->color_range = codec_avctx->color_range;
154 ✗ avctx->color_trc = codec_avctx->color_trc;
155 ✗ avctx->color_primaries = codec_avctx->color_primaries;
156 ✗ avctx->chroma_sample_location = codec_avctx->chroma_sample_location;
157
158 ✗ *got_frame = 1;
159
160 ✗ return avpkt->size;
161 }
162
163 ✗ static av_cold void imm5_flush(AVCodecContext *avctx)
164 {
165 ✗ IMM5Context *ctx = avctx->priv_data;
166
167 ✗ avcodec_flush_buffers(ctx->h264_avctx);
168 ✗ avcodec_flush_buffers(ctx->hevc_avctx);
169 ✗ }
170
171 ✗ static av_cold int imm5_close(AVCodecContext *avctx)
172 {
173 ✗ IMM5Context *ctx = avctx->priv_data;
174
175 ✗ avcodec_free_context(&ctx->h264_avctx);
176 ✗ avcodec_free_context(&ctx->hevc_avctx);
177
178 ✗ return 0;
179 }
180
181 const FFCodec ff_imm5_decoder = {
182 .p.name = "imm5",
183 CODEC_LONG_NAME("Infinity IMM5"),
184 .p.type = AVMEDIA_TYPE_VIDEO,
185 .p.id = AV_CODEC_ID_IMM5,
186 .init = imm5_init,
187 FF_CODEC_DECODE_CB(imm5_decode_frame),
188 .close = imm5_close,
189 .flush = imm5_flush,
190 .priv_data_size = sizeof(IMM5Context),
191 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
192 };
193