GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/imm5.c Lines: 0 87 0.0 %
Date: 2019-11-18 18:00:01 Branches: 0 38 0.0 %

Line Branch Exec Source
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/intreadwrite.h"
22
23
#include "avcodec.h"
24
#include "internal.h"
25
26
typedef struct IMM5Context {
27
    AVCodecContext *h264_avctx;   // wrapper context for H264
28
    AVCodecContext *hevc_avctx;   // wrapper context for HEVC
29
} IMM5Context;
30
31
static const struct IMM5_unit {
32
    uint8_t bits[14];
33
    uint8_t len;
34
} IMM5_units[14] = {
35
    { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x0B, 0x0F, 0x88 }, 12 },
36
    { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x83, 0xE2 }, 12 },
37
    { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x81, 0xE8, 0x80 }, 13 },
38
    { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x0B, 0x04, 0xA2 }, 12 },
39
    { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x81, 0x28, 0x80 }, 13 },
40
    { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x80, 0x1E, 0xF4, 0x05, 0x80, 0x92, 0x20 }, 13 },
41
    { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x0B, 0x0F, 0xC8 }, 13 },
42
    { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x83, 0xF2 }, 13 },
43
    { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x81, 0xEC, 0x80 }, 14 },
44
    { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x0B, 0x04, 0xB2 }, 13 },
45
    { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x81, 0x2C, 0x80 }, 14 },
46
    { { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1E, 0x9A, 0x74, 0x05, 0x80, 0x93, 0x20 }, 14 },
47
    { { 0x00, 0x00, 0x00, 0x01, 0x68, 0xDE, 0x3C, 0x80 }, 8 },
48
    { { 0x00, 0x00, 0x00, 0x01, 0x68, 0xCE, 0x32, 0x28 }, 8 },
49
};
50
51
static av_cold int imm5_init(AVCodecContext *avctx)
52
{
53
    IMM5Context *ctx = avctx->priv_data;
54
    const AVCodec *codec;
55
    int ret;
56
57
    codec = avcodec_find_decoder(AV_CODEC_ID_H264);
58
    if (!codec)
59
        return AVERROR_BUG;
60
    ctx->h264_avctx = avcodec_alloc_context3(codec);
61
    if (!ctx->h264_avctx)
62
        return AVERROR(ENOMEM);
63
    ctx->h264_avctx->thread_count = 1;
64
    ctx->h264_avctx->flags        = avctx->flags;
65
    ctx->h264_avctx->flags2       = avctx->flags2;
66
    ret = ff_codec_open2_recursive(ctx->h264_avctx, codec, NULL);
67
    if (ret < 0)
68
        return ret;
69
70
    codec = avcodec_find_decoder(AV_CODEC_ID_HEVC);
71
    if (!codec)
72
        return AVERROR_BUG;
73
    ctx->hevc_avctx = avcodec_alloc_context3(codec);
74
    if (!ctx->hevc_avctx)
75
        return AVERROR(ENOMEM);
76
    ctx->hevc_avctx->thread_count = 1;
77
    ctx->hevc_avctx->flags        = avctx->flags;
78
    ctx->hevc_avctx->flags2       = avctx->flags2;
79
    ret = ff_codec_open2_recursive(ctx->hevc_avctx, codec, NULL);
80
    if (ret < 0)
81
        return ret;
82
83
    return 0;
84
}
85
86
static int imm5_decode_frame(AVCodecContext *avctx, void *data,
87
                             int *got_frame, AVPacket *avpkt)
88
{
89
    IMM5Context *ctx = avctx->priv_data;
90
    AVFrame *frame = data;
91
    AVCodecContext *codec_avctx = ctx->h264_avctx;
92
    int ret;
93
94
    if (avpkt->size > 24 && avpkt->data[8] <= 1 && AV_RL32(avpkt->data + 4) + 24ULL <= avpkt->size) {
95
        int codec_type = avpkt->data[1];
96
        int index = avpkt->data[10];
97
        int new_size = AV_RL32(avpkt->data + 4);
98
        int offset, off;
99
100
        if (codec_type == 0xA) {
101
            codec_avctx = ctx->hevc_avctx;
102
        } else if (index == 17) {
103
            index = 4;
104
        } else if (index == 18) {
105
            index = 5;
106
        }
107
108
        if (index >= 1 && index <= 12) {
109
            ret = av_packet_make_writable(avpkt);
110
            if (ret < 0)
111
                return ret;
112
113
            index -= 1;
114
            off = offset = IMM5_units[index].len;
115
            if (codec_type == 2) {
116
                offset += IMM5_units[12].len;
117
            } else {
118
                offset += IMM5_units[13].len;
119
            }
120
121
            avpkt->data += 24 - offset;
122
            avpkt->size = new_size + offset;
123
124
            memcpy(avpkt->data, IMM5_units[index].bits, IMM5_units[index].len);
125
            if (codec_type == 2) {
126
                memcpy(avpkt->data + off, IMM5_units[12].bits, IMM5_units[12].len);
127
            } else {
128
                memcpy(avpkt->data + off, IMM5_units[13].bits, IMM5_units[13].len);
129
            }
130
        } else {
131
            avpkt->data += 24;
132
            avpkt->size -= 24;
133
        }
134
    }
135
136
    ret = avcodec_send_packet(codec_avctx, avpkt);
137
    if (ret < 0) {
138
        av_log(avctx, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
139
        return ret;
140
    }
141
142
    ret = avcodec_receive_frame(codec_avctx, frame);
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 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
AVCodec ff_imm5_decoder = {
182
    .name           = "imm5",
183
    .long_name      = NULL_IF_CONFIG_SMALL("Infinity IMM5"),
184
    .type           = AVMEDIA_TYPE_VIDEO,
185
    .id             = AV_CODEC_ID_IMM5,
186
    .init           = imm5_init,
187
    .decode         = imm5_decode_frame,
188
    .close          = imm5_close,
189
    .flush          = imm5_flush,
190
    .priv_data_size = sizeof(IMM5Context),
191
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE |
192
                      FF_CODEC_CAP_INIT_CLEANUP,
193
};