1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/*
* Copyright (c) 2019 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "internal.h"
typedef struct IMM5Context {
AVCodecContext *h264_avctx; // wrapper context for H264
AVCodecContext *hevc_avctx; // wrapper context for HEVC
} IMM5Context;
static const struct IMM5_unit {
uint8_t bits[14];
uint8_t len;
} IMM5_units[14] = {
{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x0B, 0x0F, 0x88 }, 12 },
{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x83, 0xE2 }, 12 },
{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x81, 0xE8, 0x80 }, 13 },
{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x0B, 0x04, 0xA2 }, 12 },
{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x81, 0x28, 0x80 }, 13 },
{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x80, 0x92, 0x20 }, 13 },
{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x0B, 0x0F, 0xC8 }, 13 },
{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x83, 0xF2 }, 13 },
{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x81, 0xEC, 0x80 }, 14 },
{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x0B, 0x04, 0xB2 }, 13 },
{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x81, 0x2C, 0x80 }, 14 },
{ { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x80, 0x93, 0x20 }, 14 },
{ { 0x00, 0x00, 0x00, 0x01, 0x68, 0xDE, 0x3C, 0x80 }, 8 },
{ { 0x00, 0x00, 0x00, 0x01, 0x68, 0xCE, 0x32, 0x28 }, 8 },
};
static av_cold int imm5_init(AVCodecContext *avctx)
{
IMM5Context *ctx = avctx->priv_data;
const AVCodec *codec;
int ret;
codec = avcodec_find_decoder(AV_CODEC_ID_H264);
if (!codec)
return AVERROR_BUG;
ctx->h264_avctx = avcodec_alloc_context3(codec);
if (!ctx->h264_avctx)
return AVERROR(ENOMEM);
ctx->h264_avctx->thread_count = 1;
ctx->h264_avctx->flags = avctx->flags;
ctx->h264_avctx->flags2 = avctx->flags2;
ret = ff_codec_open2_recursive(ctx->h264_avctx, codec, NULL);
if (ret < 0)
return ret;
codec = avcodec_find_decoder(AV_CODEC_ID_HEVC);
if (!codec)
return AVERROR_BUG;
ctx->hevc_avctx = avcodec_alloc_context3(codec);
if (!ctx->hevc_avctx)
return AVERROR(ENOMEM);
ctx->hevc_avctx->thread_count = 1;
ctx->hevc_avctx->flags = avctx->flags;
ctx->hevc_avctx->flags2 = avctx->flags2;
ret = ff_codec_open2_recursive(ctx->hevc_avctx, codec, NULL);
if (ret < 0)
return ret;
return 0;
}
static int imm5_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
IMM5Context *ctx = avctx->priv_data;
AVFrame *frame = data;
AVCodecContext *codec_avctx = ctx->h264_avctx;
int ret;
if (avpkt->size > 24 && avpkt->data[8] <= 1 && AV_RL32(avpkt->data + 4) + 24ULL <= avpkt->size) {
int codec_type = avpkt->data[1];
int index = avpkt->data[10];
int new_size = AV_RL32(avpkt->data + 4);
int offset, off;
if (codec_type == 0xA) {
codec_avctx = ctx->hevc_avctx;
} else if (index == 17) {
index = 4;
} else if (index == 18) {
index = 5;
}
if (index >= 1 && index <= 12) {
ret = av_packet_make_writable(avpkt);
if (ret < 0)
return ret;
index -= 1;
off = offset = IMM5_units[index].len;
if (codec_type == 2) {
offset += IMM5_units[12].len;
} else {
offset += IMM5_units[13].len;
}
avpkt->data += 24 - offset;
avpkt->size = new_size + offset;
memcpy(avpkt->data, IMM5_units[index].bits, IMM5_units[index].len);
if (codec_type == 2) {
memcpy(avpkt->data + off, IMM5_units[12].bits, IMM5_units[12].len);
} else {
memcpy(avpkt->data + off, IMM5_units[13].bits, IMM5_units[13].len);
}
} else {
avpkt->data += 24;
avpkt->size -= 24;
}
}
ret = avcodec_send_packet(codec_avctx, avpkt);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
return ret;
}
ret = avcodec_receive_frame(codec_avctx, frame);
if (ret < 0)
return ret;
avctx->pix_fmt = codec_avctx->pix_fmt;
avctx->coded_width = codec_avctx->coded_width;
avctx->coded_height = codec_avctx->coded_height;
avctx->width = codec_avctx->width;
avctx->height = codec_avctx->height;
avctx->bit_rate = codec_avctx->bit_rate;
avctx->colorspace = codec_avctx->colorspace;
avctx->color_range = codec_avctx->color_range;
avctx->color_trc = codec_avctx->color_trc;
avctx->color_primaries = codec_avctx->color_primaries;
avctx->chroma_sample_location = codec_avctx->chroma_sample_location;
*got_frame = 1;
return avpkt->size;
}
static void imm5_flush(AVCodecContext *avctx)
{
IMM5Context *ctx = avctx->priv_data;
avcodec_flush_buffers(ctx->h264_avctx);
avcodec_flush_buffers(ctx->hevc_avctx);
}
static av_cold int imm5_close(AVCodecContext *avctx)
{
IMM5Context *ctx = avctx->priv_data;
avcodec_free_context(&ctx->h264_avctx);
avcodec_free_context(&ctx->hevc_avctx);
return 0;
}
AVCodec ff_imm5_decoder = {
.name = "imm5",
.long_name = NULL_IF_CONFIG_SMALL("Infinity IMM5"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_IMM5,
.init = imm5_init,
.decode = imm5_decode_frame,
.close = imm5_close,
.flush = imm5_flush,
.priv_data_size = sizeof(IMM5Context),
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
FF_CODEC_CAP_INIT_CLEANUP,
};
|
