| 1 | /* |
| 2 | * Copyright (c) 2012 Georg Lippitsch <georg.lippitsch@gmx.at> |
| 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 | /** |
| 22 | * @file |
| 23 | * libiec61883 interface |
| 24 | */ |
| 25 | |
| 26 | #include <sys/poll.h> |
| 27 | #include <libraw1394/raw1394.h> |
| 28 | #include <libavc1394/avc1394.h> |
| 29 | #include <libavc1394/rom1394.h> |
| 30 | #include <libiec61883/iec61883.h> |
| 31 | #include "libavformat/dv.h" |
| 32 | #include "libavformat/mpegts.h" |
| 33 | #include "libavutil/opt.h" |
| 34 | #include "avdevice.h" |
| 35 | |
| 36 | #define THREADS HAVE_PTHREADS |
| 37 | |
| 38 | #if THREADS |
| 39 | #include <pthread.h> |
| 40 | #endif |
| 41 | |
| 42 | #define MOTDCT_SPEC_ID 0x00005068 |
| 43 | #define IEC61883_AUTO 0 |
| 44 | #define IEC61883_DV 1 |
| 45 | #define IEC61883_HDV 2 |
| 46 | |
| 47 | /** |
| 48 | * For DV, one packet corresponds exactly to one frame. |
| 49 | * For HDV, these are MPEG2 transport stream packets. |
| 50 | * The queue is implemented as linked list. |
| 51 | */ |
| 52 | typedef struct DVPacket { |
| 53 | uint8_t *buf; ///< actual buffer data |
| 54 | int len; ///< size of buffer allocated |
| 55 | struct DVPacket *next; ///< next DVPacket |
| 56 | } DVPacket; |
| 57 | |
| 58 | struct iec61883_data { |
| 59 | AVClass *class; |
| 60 | raw1394handle_t raw1394; ///< handle for libraw1394 |
| 61 | iec61883_dv_fb_t iec61883_dv; ///< handle for libiec61883 when used with DV |
| 62 | iec61883_mpeg2_t iec61883_mpeg2; ///< handle for libiec61883 when used with HDV |
| 63 | |
| 64 | DVDemuxContext *dv_demux; ///< generic DV muxing/demuxing context |
| 65 | MpegTSContext *mpeg_demux; ///< generic HDV muxing/demuxing context |
| 66 | |
| 67 | DVPacket *queue_first; ///< first element of packet queue |
| 68 | DVPacket *queue_last; ///< last element of packet queue |
| 69 | |
| 70 | char *device_guid; ///< to select one of multiple DV devices |
| 71 | |
| 72 | int packets; ///< Number of packets queued |
| 73 | int max_packets; ///< Max. number of packets in queue |
| 74 | |
| 75 | int bandwidth; ///< returned by libiec61883 |
| 76 | int channel; ///< returned by libiec61883 |
| 77 | int input_port; ///< returned by libiec61883 |
| 78 | int type; ///< Stream type, to distinguish DV/HDV |
| 79 | int node; ///< returned by libiec61883 |
| 80 | int output_port; ///< returned by libiec61883 |
| 81 | int thread_loop; ///< Condition for thread while-loop |
| 82 | int receiving; ///< True as soon data from device available |
| 83 | int receive_error; ///< Set in receive task in case of error |
| 84 | int eof; ///< True as soon as no more data available |
| 85 | |
| 86 | struct pollfd raw1394_poll; ///< to poll for new data from libraw1394 |
| 87 | |
| 88 | /** Parse function for DV/HDV differs, so this is set before packets arrive */ |
| 89 | int (*parse_queue)(struct iec61883_data *dv, AVPacket *pkt); |
| 90 | |
| 91 | #if THREADS |
| 92 | pthread_t receive_task_thread; |
| 93 | pthread_mutex_t mutex; |
| 94 | pthread_cond_t cond; |
| 95 | #endif |
| 96 | }; |
| 97 | |
| 98 | static int iec61883_callback(unsigned char *data, int length, |
| 99 | int complete, void *callback_data) |
| 100 | { |
| 101 | struct iec61883_data *dv = callback_data; |
| 102 | DVPacket *packet; |
| 103 | int ret; |
| 104 | |
| 105 | #if THREADS |
| 106 | pthread_mutex_lock(&dv->mutex); |
| 107 | #endif |
| 108 | |
| 109 | if (dv->packets >= dv->max_packets) { |
| 110 | av_log(NULL, AV_LOG_ERROR, "DV packet queue overrun, dropping.\n"); |
| 111 | ret = 0; |
| 112 | goto exit; |
| 113 | } |
| 114 | |
| 115 | packet = av_mallocz(sizeof(*packet)); |
| 116 | if (!packet) { |
| 117 | ret = -1; |
| 118 | goto exit; |
| 119 | } |
| 120 | |
| 121 | packet->buf = av_malloc(length); |
| 122 | if (!packet->buf) { |
| 123 | ret = -1; |
| 124 | goto exit; |
| 125 | } |
| 126 | packet->len = length; |
| 127 | |
| 128 | memcpy(packet->buf, data, length); |
| 129 | |
| 130 | if (dv->queue_first) { |
| 131 | dv->queue_last->next = packet; |
| 132 | dv->queue_last = packet; |
| 133 | } else { |
| 134 | dv->queue_first = packet; |
| 135 | dv->queue_last = packet; |
| 136 | } |
| 137 | dv->packets++; |
| 138 | |
| 139 | ret = 0; |
| 140 | |
| 141 | exit: |
| 142 | #if THREADS |
| 143 | pthread_cond_broadcast(&dv->cond); |
| 144 | pthread_mutex_unlock(&dv->mutex); |
| 145 | #endif |
| 146 | return ret; |
| 147 | } |
| 148 | |
| 149 | static void *iec61883_receive_task(void *opaque) |
| 150 | { |
| 151 | struct iec61883_data *dv = (struct iec61883_data *)opaque; |
| 152 | int result; |
| 153 | |
| 154 | #if THREADS |
| 155 | while (dv->thread_loop) |
| 156 | #endif |
| 157 | { |
| 158 | while ((result = poll(&dv->raw1394_poll, 1, 200)) < 0) { |
| 159 | if (!(errno == EAGAIN || errno == EINTR)) { |
| 160 | av_log(NULL, AV_LOG_ERROR, "Raw1394 poll error occurred.\n"); |
| 161 | dv->receive_error = AVERROR(EIO); |
| 162 | return NULL; |
| 163 | } |
| 164 | } |
| 165 | if (result > 0 && ((dv->raw1394_poll.revents & POLLIN) |
| 166 | || (dv->raw1394_poll.revents & POLLPRI))) { |
| 167 | dv->receiving = 1; |
| 168 | raw1394_loop_iterate(dv->raw1394); |
| 169 | } else if (dv->receiving) { |
| 170 | av_log(NULL, AV_LOG_ERROR, "No more input data available\n"); |
| 171 | #if THREADS |
| 172 | pthread_mutex_lock(&dv->mutex); |
| 173 | dv->eof = 1; |
| 174 | pthread_cond_broadcast(&dv->cond); |
| 175 | pthread_mutex_unlock(&dv->mutex); |
| 176 | #else |
| 177 | dv->eof = 1; |
| 178 | #endif |
| 179 | return NULL; |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | return NULL; |
| 184 | } |
| 185 | |
| 186 | static int iec61883_parse_queue_dv(struct iec61883_data *dv, AVPacket *pkt) |
| 187 | { |
| 188 | DVPacket *packet; |
| 189 | int size; |
| 190 | |
| 191 | size = avpriv_dv_get_packet(dv->dv_demux, pkt); |
| 192 | if (size > 0) |
| 193 | return size; |
| 194 | |
| 195 | packet = dv->queue_first; |
| 196 | if (!packet) |
| 197 | return -1; |
| 198 | |
| 199 | size = avpriv_dv_produce_packet(dv->dv_demux, pkt, |
| 200 | packet->buf, packet->len, -1); |
| 201 | pkt->destruct = av_destruct_packet; |
| 202 | dv->queue_first = packet->next; |
| 203 | av_free(packet); |
| 204 | dv->packets--; |
| 205 | |
| 206 | if (size > 0) |
| 207 | return size; |
| 208 | |
| 209 | return -1; |
| 210 | } |
| 211 | |
| 212 | static int iec61883_parse_queue_hdv(struct iec61883_data *dv, AVPacket *pkt) |
| 213 | { |
| 214 | DVPacket *packet; |
| 215 | int size; |
| 216 | |
| 217 | while (dv->queue_first) { |
| 218 | packet = dv->queue_first; |
| 219 | size = avpriv_mpegts_parse_packet(dv->mpeg_demux, pkt, packet->buf, |
| 220 | packet->len); |
| 221 | dv->queue_first = packet->next; |
| 222 | av_freep(&packet->buf); |
| 223 | av_freep(&packet); |
| 224 | dv->packets--; |
| 225 | |
| 226 | if (size > 0) |
| 227 | return size; |
| 228 | } |
| 229 | |
| 230 | return -1; |
| 231 | } |
| 232 | |
| 233 | static int iec61883_read_header(AVFormatContext *context) |
| 234 | { |
| 235 | struct iec61883_data *dv = context->priv_data; |
| 236 | struct raw1394_portinfo pinf[16]; |
| 237 | rom1394_directory rom_dir; |
| 238 | char *endptr; |
| 239 | int inport; |
| 240 | int nb_ports; |
| 241 | int port = -1; |
| 242 | int response; |
| 243 | int i, j = 0; |
| 244 | uint64_t guid = 0; |
| 245 | |
| 246 | dv->input_port = -1; |
| 247 | dv->output_port = -1; |
| 248 | dv->channel = -1; |
| 249 | |
| 250 | dv->raw1394 = raw1394_new_handle(); |
| 251 | |
| 252 | if (!dv->raw1394) { |
| 253 | av_log(context, AV_LOG_ERROR, "Failed to open IEEE1394 interface.\n"); |
| 254 | return AVERROR(EIO); |
| 255 | } |
| 256 | |
| 257 | if ((nb_ports = raw1394_get_port_info(dv->raw1394, pinf, 16)) < 0) { |
| 258 | av_log(context, AV_LOG_ERROR, "Failed to get number of IEEE1394 ports.\n"); |
| 259 | goto fail; |
| 260 | } |
| 261 | |
| 262 | inport = strtol(context->filename, &endptr, 10); |
| 263 | if (endptr != context->filename && *endptr == '\0') { |
| 264 | av_log(context, AV_LOG_INFO, "Selecting IEEE1394 port: %d\n", inport); |
| 265 | j = inport; |
| 266 | nb_ports = inport + 1; |
| 267 | } else if (strcmp(context->filename, "auto")) { |
| 268 | av_log(context, AV_LOG_ERROR, "Invalid input \"%s\", you should specify " |
| 269 | "\"auto\" for auto-detection, or the port number.\n", context->filename); |
| 270 | goto fail; |
| 271 | } |
| 272 | |
| 273 | if (dv->device_guid) { |
| 274 | if (sscanf(dv->device_guid, "%llx", (long long unsigned int *)&guid) != 1) { |
| 275 | av_log(context, AV_LOG_INFO, "Invalid dvguid parameter: %s\n", |
| 276 | dv->device_guid); |
| 277 | goto fail; |
| 278 | } |
| 279 | } |
| 280 | |
| 281 | for (; j < nb_ports && port==-1; ++j) { |
| 282 | raw1394_destroy_handle(dv->raw1394); |
| 283 | |
| 284 | if (!(dv->raw1394 = raw1394_new_handle_on_port(j))) { |
| 285 | av_log(context, AV_LOG_ERROR, "Failed setting IEEE1394 port.\n"); |
| 286 | goto fail; |
| 287 | } |
| 288 | |
| 289 | for (i=0; i<raw1394_get_nodecount(dv->raw1394); ++i) { |
| 290 | |
| 291 | /* Select device explicitly by GUID */ |
| 292 | |
| 293 | if (guid > 1) { |
| 294 | if (guid == rom1394_get_guid(dv->raw1394, i)) { |
| 295 | dv->node = i; |
| 296 | port = j; |
| 297 | break; |
| 298 | } |
| 299 | } else { |
| 300 | |
| 301 | /* Select first AV/C tape recorder player node */ |
| 302 | |
| 303 | if (rom1394_get_directory(dv->raw1394, i, &rom_dir) < 0) |
| 304 | continue; |
| 305 | if (((rom1394_get_node_type(&rom_dir) == ROM1394_NODE_TYPE_AVC) && |
| 306 | avc1394_check_subunit_type(dv->raw1394, i, AVC1394_SUBUNIT_TYPE_VCR)) || |
| 307 | (rom_dir.unit_spec_id == MOTDCT_SPEC_ID)) { |
| 308 | rom1394_free_directory(&rom_dir); |
| 309 | dv->node = i; |
| 310 | port = j; |
| 311 | break; |
| 312 | } |
| 313 | rom1394_free_directory(&rom_dir); |
| 314 | } |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | if (port == -1) { |
| 319 | av_log(context, AV_LOG_ERROR, "No AV/C devices found.\n"); |
| 320 | goto fail; |
| 321 | } |
| 322 | |
| 323 | /* Provide bus sanity for multiple connections */ |
| 324 | |
| 325 | iec61883_cmp_normalize_output(dv->raw1394, 0xffc0 | dv->node); |
| 326 | |
| 327 | /* Find out if device is DV or HDV */ |
| 328 | |
| 329 | if (dv->type == IEC61883_AUTO) { |
| 330 | response = avc1394_transaction(dv->raw1394, dv->node, |
| 331 | AVC1394_CTYPE_STATUS | |
| 332 | AVC1394_SUBUNIT_TYPE_TAPE_RECORDER | |
| 333 | AVC1394_SUBUNIT_ID_0 | |
| 334 | AVC1394_VCR_COMMAND_OUTPUT_SIGNAL_MODE | |
| 335 | 0xFF, 2); |
| 336 | response = AVC1394_GET_OPERAND0(response); |
| 337 | dv->type = (response == 0x10 || response == 0x90 || response == 0x1A || response == 0x9A) ? |
| 338 | IEC61883_HDV : IEC61883_DV; |
| 339 | } |
| 340 | |
| 341 | /* Connect to device, and do initialization */ |
| 342 | |
| 343 | dv->channel = iec61883_cmp_connect(dv->raw1394, dv->node, &dv->output_port, |
| 344 | raw1394_get_local_id(dv->raw1394), |
| 345 | &dv->input_port, &dv->bandwidth); |
| 346 | |
| 347 | if (dv->channel < 0) |
| 348 | dv->channel = 63; |
| 349 | |
| 350 | if (!dv->max_packets) |
| 351 | dv->max_packets = 100; |
| 352 | |
| 353 | if (CONFIG_MPEGTS_DEMUXER && dv->type == IEC61883_HDV) { |
| 354 | |
| 355 | /* Init HDV receive */ |
| 356 | |
| 357 | avformat_new_stream(context, NULL); |
| 358 | |
| 359 | dv->mpeg_demux = avpriv_mpegts_parse_open(context); |
| 360 | if (!dv->mpeg_demux) |
| 361 | goto fail; |
| 362 | |
| 363 | dv->parse_queue = iec61883_parse_queue_hdv; |
| 364 | |
| 365 | dv->iec61883_mpeg2 = iec61883_mpeg2_recv_init(dv->raw1394, |
| 366 | (iec61883_mpeg2_recv_t)iec61883_callback, |
| 367 | dv); |
| 368 | |
| 369 | dv->max_packets *= 766; |
| 370 | } else { |
| 371 | |
| 372 | /* Init DV receive */ |
| 373 | |
| 374 | dv->dv_demux = avpriv_dv_init_demux(context); |
| 375 | if (!dv->dv_demux) |
| 376 | goto fail; |
| 377 | |
| 378 | dv->parse_queue = iec61883_parse_queue_dv; |
| 379 | |
| 380 | dv->iec61883_dv = iec61883_dv_fb_init(dv->raw1394, iec61883_callback, dv); |
| 381 | } |
| 382 | |
| 383 | dv->raw1394_poll.fd = raw1394_get_fd(dv->raw1394); |
| 384 | dv->raw1394_poll.events = POLLIN | POLLERR | POLLHUP | POLLPRI; |
| 385 | |
| 386 | /* Actually start receiving */ |
| 387 | |
| 388 | if (dv->type == IEC61883_HDV) |
| 389 | iec61883_mpeg2_recv_start(dv->iec61883_mpeg2, dv->channel); |
| 390 | else |
| 391 | iec61883_dv_fb_start(dv->iec61883_dv, dv->channel); |
| 392 | |
| 393 | #if THREADS |
| 394 | dv->thread_loop = 1; |
| 395 | pthread_mutex_init(&dv->mutex, NULL); |
| 396 | pthread_cond_init(&dv->cond, NULL); |
| 397 | pthread_create(&dv->receive_task_thread, NULL, iec61883_receive_task, dv); |
| 398 | #endif |
| 399 | |
| 400 | return 0; |
| 401 | |
| 402 | fail: |
| 403 | raw1394_destroy_handle(dv->raw1394); |
| 404 | return AVERROR(EIO); |
| 405 | } |
| 406 | |
| 407 | static int iec61883_read_packet(AVFormatContext *context, AVPacket *pkt) |
| 408 | { |
| 409 | struct iec61883_data *dv = context->priv_data; |
| 410 | int size; |
| 411 | |
| 412 | /** |
| 413 | * Try to parse frames from queue |
| 414 | */ |
| 415 | |
| 416 | #if THREADS |
| 417 | pthread_mutex_lock(&dv->mutex); |
| 418 | while ((size = dv->parse_queue(dv, pkt)) == -1) |
| 419 | if (!dv->eof) |
| 420 | pthread_cond_wait(&dv->cond, &dv->mutex); |
| 421 | else |
| 422 | break; |
| 423 | pthread_mutex_unlock(&dv->mutex); |
| 424 | #else |
| 425 | int result; |
| 426 | while ((size = dv->parse_queue(dv, pkt)) == -1) { |
| 427 | iec61883_receive_task((void *)dv); |
| 428 | if (dv->receive_error) |
| 429 | return dv->receive_error; |
| 430 | } |
| 431 | #endif |
| 432 | |
| 433 | return size; |
| 434 | } |
| 435 | |
| 436 | static int iec61883_close(AVFormatContext *context) |
| 437 | { |
| 438 | struct iec61883_data *dv = context->priv_data; |
| 439 | |
| 440 | #if THREADS |
| 441 | dv->thread_loop = 0; |
| 442 | pthread_join(dv->receive_task_thread, NULL); |
| 443 | pthread_cond_destroy(&dv->cond); |
| 444 | pthread_mutex_destroy(&dv->mutex); |
| 445 | #endif |
| 446 | |
| 447 | if (CONFIG_MPEGTS_DEMUXER && dv->type == IEC61883_HDV) { |
| 448 | iec61883_mpeg2_recv_stop(dv->iec61883_mpeg2); |
| 449 | iec61883_mpeg2_close(dv->iec61883_mpeg2); |
| 450 | avpriv_mpegts_parse_close(dv->mpeg_demux); |
| 451 | } else { |
| 452 | iec61883_dv_fb_stop(dv->iec61883_dv); |
| 453 | iec61883_dv_fb_close(dv->iec61883_dv); |
| 454 | } |
| 455 | while (dv->queue_first) { |
| 456 | DVPacket *packet = dv->queue_first; |
| 457 | dv->queue_first = packet->next; |
| 458 | av_freep(&packet->buf); |
| 459 | av_freep(&packet); |
| 460 | } |
| 461 | |
| 462 | iec61883_cmp_disconnect(dv->raw1394, dv->node, dv->output_port, |
| 463 | raw1394_get_local_id(dv->raw1394), |
| 464 | dv->input_port, dv->channel, dv->bandwidth); |
| 465 | |
| 466 | raw1394_destroy_handle(dv->raw1394); |
| 467 | |
| 468 | return 0; |
| 469 | } |
| 470 | |
| 471 | static const AVOption options[] = { |
| 472 | { "dvtype", "override autodetection of DV/HDV", offsetof(struct iec61883_data, type), AV_OPT_TYPE_INT, {.i64 = IEC61883_AUTO}, IEC61883_AUTO, IEC61883_HDV, AV_OPT_FLAG_DECODING_PARAM, "dvtype" }, |
| 473 | { "auto", "auto detect DV/HDV", 0, AV_OPT_TYPE_CONST, {.i64 = IEC61883_AUTO}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "dvtype" }, |
| 474 | { "dv", "force device being treated as DV device", 0, AV_OPT_TYPE_CONST, {.i64 = IEC61883_DV}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "dvtype" }, |
| 475 | { "hdv" , "force device being treated as HDV device", 0, AV_OPT_TYPE_CONST, {.i64 = IEC61883_HDV}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "dvtype" }, |
| 476 | { "dvbuffer", "set queue buffer size (in packets)", offsetof(struct iec61883_data, max_packets), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, |
| 477 | { "dvguid", "select one of multiple DV devices by its GUID", offsetof(struct iec61883_data, device_guid), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM }, |
| 478 | { NULL }, |
| 479 | }; |
| 480 | |
| 481 | static const AVClass iec61883_class = { |
| 482 | .class_name = "iec61883 indev", |
| 483 | .item_name = av_default_item_name, |
| 484 | .option = options, |
| 485 | .version = LIBAVUTIL_VERSION_INT, |
| 486 | .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT, |
| 487 | }; |
| 488 | |
| 489 | AVInputFormat ff_iec61883_demuxer = { |
| 490 | .name = "iec61883", |
| 491 | .long_name = NULL_IF_CONFIG_SMALL("libiec61883 (new DV1394) A/V input device"), |
| 492 | .priv_data_size = sizeof(struct iec61883_data), |
| 493 | .read_header = iec61883_read_header, |
| 494 | .read_packet = iec61883_read_packet, |
| 495 | .read_close = iec61883_close, |
| 496 | .flags = AVFMT_NOFILE, |
| 497 | .priv_class = &iec61883_class, |
| 498 | }; |