| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * IFV demuxer | ||
| 3 | * | ||
| 4 | * Copyright (c) 2019 Swaraj Hota | ||
| 5 | * | ||
| 6 | * This file is part of FFmpeg. | ||
| 7 | * | ||
| 8 | * FFmpeg is free software; you can redistribute it and/or | ||
| 9 | * modify it under the terms of the GNU Lesser General Public | ||
| 10 | * License as published by the Free Software Foundation; either | ||
| 11 | * version 2.1 of the License, or (at your option) any later version. | ||
| 12 | * | ||
| 13 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 16 | * Lesser General Public License for more details. | ||
| 17 | * | ||
| 18 | * You should have received a copy of the GNU Lesser General Public | ||
| 19 | * License along with FFmpeg; if not, write to the Free Software | ||
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 21 | */ | ||
| 22 | |||
| 23 | #include "libavutil/channel_layout.h" | ||
| 24 | #include "avformat.h" | ||
| 25 | #include "demux.h" | ||
| 26 | #include "internal.h" | ||
| 27 | #include "avio_internal.h" | ||
| 28 | |||
| 29 | typedef struct IFVContext { | ||
| 30 | uint32_t next_video_index; | ||
| 31 | uint32_t next_audio_index; | ||
| 32 | uint32_t total_vframes; | ||
| 33 | uint32_t total_aframes; | ||
| 34 | |||
| 35 | int width, height; | ||
| 36 | int is_audio_present; | ||
| 37 | int sample_rate; | ||
| 38 | |||
| 39 | int video_stream_index; | ||
| 40 | int audio_stream_index; | ||
| 41 | } IFVContext; | ||
| 42 | |||
| 43 | 7235 | static int ifv_probe(const AVProbeData *p) | |
| 44 | { | ||
| 45 | static const uint8_t ifv_magic[] = {0x11, 0xd2, 0xd3, 0xab, 0xba, 0xa9, | ||
| 46 | 0xcf, 0x11, 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65, 0x44}; | ||
| 47 | |||
| 48 |
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7235 | if (!memcmp(p->buf, ifv_magic, sizeof(ifv_magic))) |
| 49 | ✗ | return AVPROBE_SCORE_MAX; | |
| 50 | |||
| 51 | 7235 | return 0; | |
| 52 | } | ||
| 53 | |||
| 54 | ✗ | static int read_index(AVFormatContext *s, | |
| 55 | enum AVMediaType frame_type, | ||
| 56 | uint32_t start_index) | ||
| 57 | { | ||
| 58 | ✗ | IFVContext *ifv = s->priv_data; | |
| 59 | AVStream *st; | ||
| 60 | int64_t pos, size, timestamp; | ||
| 61 | uint32_t end_index, i; | ||
| 62 | int ret; | ||
| 63 | |||
| 64 | ✗ | if (frame_type == AVMEDIA_TYPE_VIDEO) { | |
| 65 | ✗ | end_index = ifv->total_vframes; | |
| 66 | ✗ | st = s->streams[ifv->video_stream_index]; | |
| 67 | } else { | ||
| 68 | ✗ | end_index = ifv->total_aframes; | |
| 69 | ✗ | st = s->streams[ifv->audio_stream_index]; | |
| 70 | } | ||
| 71 | |||
| 72 | ✗ | for (i = start_index; i < end_index; i++) { | |
| 73 | ✗ | if (avio_feof(s->pb)) | |
| 74 | ✗ | return AVERROR_EOF; | |
| 75 | ✗ | pos = avio_rl32(s->pb); | |
| 76 | ✗ | size = avio_rl32(s->pb); | |
| 77 | |||
| 78 | ✗ | avio_skip(s->pb, 8); | |
| 79 | ✗ | timestamp = avio_rl32(s->pb); | |
| 80 | |||
| 81 | ✗ | ret = av_add_index_entry(st, pos, timestamp, size, 0, 0); | |
| 82 | ✗ | if (ret < 0) | |
| 83 | ✗ | return ret; | |
| 84 | |||
| 85 | ✗ | avio_skip(s->pb, frame_type == AVMEDIA_TYPE_VIDEO ? 8: 4); | |
| 86 | } | ||
| 87 | |||
| 88 | ✗ | return 0; | |
| 89 | } | ||
| 90 | |||
| 91 | ✗ | static int parse_header(AVFormatContext *s) | |
| 92 | { | ||
| 93 | ✗ | IFVContext *ifv = s->priv_data; | |
| 94 | uint32_t aud_magic; | ||
| 95 | uint32_t vid_magic; | ||
| 96 | |||
| 97 | ✗ | avio_skip(s->pb, 0x34); | |
| 98 | ✗ | ff_dict_set_timestamp(&s->metadata, "creation_time", avio_rl32(s->pb) * 1000000LL); | |
| 99 | ✗ | avio_skip(s->pb, 0x24); | |
| 100 | |||
| 101 | ✗ | ifv->width = avio_rl16(s->pb); | |
| 102 | ✗ | ifv->height = avio_rl16(s->pb); | |
| 103 | |||
| 104 | ✗ | avio_skip(s->pb, 0x8); | |
| 105 | ✗ | vid_magic = avio_rl32(s->pb); | |
| 106 | |||
| 107 | ✗ | if (vid_magic != MKTAG('H','2','6','4')) | |
| 108 | ✗ | avpriv_request_sample(s, "Unknown video codec %x", vid_magic); | |
| 109 | |||
| 110 | ✗ | avio_skip(s->pb, 0x2c); | |
| 111 | ✗ | ifv->sample_rate = avio_rl32(s->pb); | |
| 112 | ✗ | aud_magic = avio_rl32(s->pb); | |
| 113 | |||
| 114 | ✗ | if (aud_magic == MKTAG('G','R','A','W')) { | |
| 115 | ✗ | ifv->is_audio_present = 1; | |
| 116 | ✗ | } else if (aud_magic == MKTAG('P','C','M','U')) { | |
| 117 | ✗ | ifv->is_audio_present = 0; | |
| 118 | } else { | ||
| 119 | ✗ | avpriv_request_sample(s, "Unknown audio codec %x", aud_magic); | |
| 120 | } | ||
| 121 | |||
| 122 | ✗ | avio_skip(s->pb, 0x44); | |
| 123 | ✗ | ifv->total_vframes = avio_rl32(s->pb); | |
| 124 | ✗ | ifv->total_aframes = avio_rl32(s->pb); | |
| 125 | |||
| 126 | ✗ | return 0; | |
| 127 | } | ||
| 128 | |||
| 129 | ✗ | static int ifv_read_header(AVFormatContext *s) | |
| 130 | { | ||
| 131 | ✗ | IFVContext *ifv = s->priv_data; | |
| 132 | AVStream *st; | ||
| 133 | int ret; | ||
| 134 | |||
| 135 | ✗ | ret = parse_header(s); | |
| 136 | ✗ | if (ret < 0) | |
| 137 | ✗ | return ret; | |
| 138 | |||
| 139 | ✗ | st = avformat_new_stream(s, NULL); | |
| 140 | ✗ | if (!st) | |
| 141 | ✗ | return AVERROR(ENOMEM); | |
| 142 | |||
| 143 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; | |
| 144 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_H264; | |
| 145 | ✗ | st->codecpar->width = ifv->width; | |
| 146 | ✗ | st->codecpar->height = ifv->height; | |
| 147 | ✗ | st->start_time = 0; | |
| 148 | ✗ | ifv->video_stream_index = st->index; | |
| 149 | |||
| 150 | ✗ | avpriv_set_pts_info(st, 32, 1, 1000); | |
| 151 | |||
| 152 | ✗ | if (ifv->is_audio_present) { | |
| 153 | ✗ | st = avformat_new_stream(s, NULL); | |
| 154 | ✗ | if (!st) | |
| 155 | ✗ | return AVERROR(ENOMEM); | |
| 156 | |||
| 157 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 158 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; | |
| 159 | ✗ | st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; | |
| 160 | ✗ | st->codecpar->sample_rate = ifv->sample_rate; | |
| 161 | ✗ | ifv->audio_stream_index = st->index; | |
| 162 | |||
| 163 | ✗ | avpriv_set_pts_info(st, 32, 1, 1000); | |
| 164 | } | ||
| 165 | |||
| 166 | /*read video index*/ | ||
| 167 | ✗ | avio_seek(s->pb, 0xf8, SEEK_SET); | |
| 168 | |||
| 169 | ✗ | ret = read_index(s, AVMEDIA_TYPE_VIDEO, 0); | |
| 170 | ✗ | if (ret < 0) | |
| 171 | ✗ | return ret; | |
| 172 | |||
| 173 | ✗ | if (ifv->is_audio_present) { | |
| 174 | /*read audio index*/ | ||
| 175 | ✗ | avio_seek(s->pb, 0x14918, SEEK_SET); | |
| 176 | |||
| 177 | ✗ | ret = read_index(s, AVMEDIA_TYPE_AUDIO, 0); | |
| 178 | ✗ | if (ret < 0) | |
| 179 | ✗ | return ret; | |
| 180 | } | ||
| 181 | |||
| 182 | ✗ | ifv->next_video_index = 0; | |
| 183 | ✗ | ifv->next_audio_index = 0; | |
| 184 | |||
| 185 | ✗ | return 0; | |
| 186 | } | ||
| 187 | |||
| 188 | ✗ | static int ifv_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 189 | { | ||
| 190 | ✗ | IFVContext *ifv = s->priv_data; | |
| 191 | AVIndexEntry *ev, *ea, *e_next; | ||
| 192 | int ret; | ||
| 193 | |||
| 194 | ✗ | ev = ea = e_next = NULL; | |
| 195 | |||
| 196 | ✗ | if (ifv->next_video_index < ifv->total_vframes) { | |
| 197 | ✗ | AVStream *const st = s->streams[ifv->video_stream_index]; | |
| 198 | ✗ | FFStream *const sti = ffstream(st); | |
| 199 | |||
| 200 | ✗ | if (ifv->next_video_index < sti->nb_index_entries) | |
| 201 | ✗ | e_next = ev = &sti->index_entries[ifv->next_video_index]; | |
| 202 | } | ||
| 203 | |||
| 204 | ✗ | if (ifv->is_audio_present && | |
| 205 | ✗ | ifv->next_audio_index < ifv->total_aframes) { | |
| 206 | ✗ | AVStream *const st = s->streams[ifv->audio_stream_index]; | |
| 207 | ✗ | FFStream *const sti = ffstream(st); | |
| 208 | |||
| 209 | ✗ | if (ifv->next_audio_index < sti->nb_index_entries) { | |
| 210 | ✗ | ea = &sti->index_entries[ifv->next_audio_index]; | |
| 211 | ✗ | if (!ev || ea->timestamp < ev->timestamp) | |
| 212 | ✗ | e_next = ea; | |
| 213 | } | ||
| 214 | } | ||
| 215 | |||
| 216 | ✗ | if (!ev) { | |
| 217 | uint64_t vframes, aframes; | ||
| 218 | ✗ | if (ifv->is_audio_present && !ea) { | |
| 219 | /*read new video and audio indexes*/ | ||
| 220 | |||
| 221 | ✗ | ifv->next_video_index = ifv->total_vframes; | |
| 222 | ✗ | ifv->next_audio_index = ifv->total_aframes; | |
| 223 | |||
| 224 | ✗ | avio_skip(s->pb, 0x1c); | |
| 225 | ✗ | vframes = ifv->total_vframes + (uint64_t)avio_rl32(s->pb); | |
| 226 | ✗ | aframes = ifv->total_aframes + (uint64_t)avio_rl32(s->pb); | |
| 227 | ✗ | if (vframes > INT_MAX || aframes > INT_MAX) | |
| 228 | ✗ | return AVERROR_INVALIDDATA; | |
| 229 | ✗ | ifv->total_vframes = vframes; | |
| 230 | ✗ | ifv->total_aframes = aframes; | |
| 231 | ✗ | avio_skip(s->pb, 0xc); | |
| 232 | |||
| 233 | ✗ | if (avio_feof(s->pb)) | |
| 234 | ✗ | return AVERROR_EOF; | |
| 235 | |||
| 236 | ✗ | ret = read_index(s, AVMEDIA_TYPE_VIDEO, ifv->next_video_index); | |
| 237 | ✗ | if (ret < 0) | |
| 238 | ✗ | return ret; | |
| 239 | |||
| 240 | ✗ | ret = read_index(s, AVMEDIA_TYPE_AUDIO, ifv->next_audio_index); | |
| 241 | ✗ | if (ret < 0) | |
| 242 | ✗ | return ret; | |
| 243 | |||
| 244 | ✗ | return 0; | |
| 245 | |||
| 246 | ✗ | } else if (!ifv->is_audio_present) { | |
| 247 | /*read new video index*/ | ||
| 248 | |||
| 249 | ✗ | ifv->next_video_index = ifv->total_vframes; | |
| 250 | |||
| 251 | ✗ | avio_skip(s->pb, 0x1c); | |
| 252 | ✗ | vframes = ifv->total_vframes + (uint64_t)avio_rl32(s->pb); | |
| 253 | ✗ | if (vframes > INT_MAX) | |
| 254 | ✗ | return AVERROR_INVALIDDATA; | |
| 255 | ✗ | ifv->total_vframes = vframes; | |
| 256 | ✗ | avio_skip(s->pb, 0x10); | |
| 257 | |||
| 258 | ✗ | if (avio_feof(s->pb)) | |
| 259 | ✗ | return AVERROR_EOF; | |
| 260 | |||
| 261 | ✗ | ret = read_index(s, AVMEDIA_TYPE_VIDEO, ifv->next_video_index); | |
| 262 | ✗ | if (ret < 0) | |
| 263 | ✗ | return ret; | |
| 264 | |||
| 265 | ✗ | return 0; | |
| 266 | } | ||
| 267 | } | ||
| 268 | |||
| 269 | ✗ | if (!e_next) return AVERROR_EOF; | |
| 270 | |||
| 271 | ✗ | avio_seek(s->pb, e_next->pos, SEEK_SET); | |
| 272 | ✗ | ret = av_get_packet(s->pb, pkt, e_next->size); | |
| 273 | ✗ | if (ret < 0) | |
| 274 | ✗ | return ret; | |
| 275 | |||
| 276 | ✗ | if (e_next == ev) { | |
| 277 | ✗ | ifv->next_video_index++; | |
| 278 | ✗ | pkt->stream_index = ifv->video_stream_index; | |
| 279 | } else { | ||
| 280 | ✗ | ifv->next_audio_index++; | |
| 281 | ✗ | pkt->stream_index = ifv->audio_stream_index; | |
| 282 | } | ||
| 283 | |||
| 284 | ✗ | pkt->pts = e_next->timestamp; | |
| 285 | ✗ | pkt->pos = e_next->pos; | |
| 286 | |||
| 287 | ✗ | return 0; | |
| 288 | } | ||
| 289 | |||
| 290 | ✗ | static int ifv_read_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags) | |
| 291 | { | ||
| 292 | ✗ | IFVContext *ifv = s->priv_data; | |
| 293 | |||
| 294 | ✗ | for (unsigned i = 0; i < s->nb_streams; i++) { | |
| 295 | ✗ | int index = av_index_search_timestamp(s->streams[i], ts, AVSEEK_FLAG_ANY); | |
| 296 | ✗ | if (index < 0) { | |
| 297 | ✗ | ifv->next_video_index = ifv->total_vframes - 1; | |
| 298 | ✗ | ifv->next_audio_index = ifv->total_aframes - 1; | |
| 299 | ✗ | return 0; | |
| 300 | } | ||
| 301 | |||
| 302 | ✗ | if (i == ifv->video_stream_index) { | |
| 303 | ✗ | ifv->next_video_index = index; | |
| 304 | } else { | ||
| 305 | ✗ | ifv->next_audio_index = index; | |
| 306 | } | ||
| 307 | } | ||
| 308 | |||
| 309 | ✗ | return 0; | |
| 310 | } | ||
| 311 | |||
| 312 | const FFInputFormat ff_ifv_demuxer = { | ||
| 313 | .p.name = "ifv", | ||
| 314 | .p.long_name = NULL_IF_CONFIG_SMALL("IFV CCTV DVR"), | ||
| 315 | .p.extensions = "ifv", | ||
| 316 | .priv_data_size = sizeof(IFVContext), | ||
| 317 | .read_probe = ifv_probe, | ||
| 318 | .read_header = ifv_read_header, | ||
| 319 | .read_packet = ifv_read_packet, | ||
| 320 | .read_seek = ifv_read_seek, | ||
| 321 | }; | ||
| 322 |