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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 */
52typedef 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
58struct 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
98static 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 av_free(packet);
124 ret = -1;
125 goto exit;
126 }
127 packet->len = length;
128
129 memcpy(packet->buf, data, length);
130
131 if (dv->queue_first) {
132 dv->queue_last->next = packet;
133 dv->queue_last = packet;
134 } else {
135 dv->queue_first = packet;
136 dv->queue_last = packet;
137 }
138 dv->packets++;
139
140 ret = 0;
141
142exit:
143#if THREADS
144 pthread_cond_broadcast(&dv->cond);
145 pthread_mutex_unlock(&dv->mutex);
146#endif
147 return ret;
148}
149
150static void *iec61883_receive_task(void *opaque)
151{
152 struct iec61883_data *dv = (struct iec61883_data *)opaque;
153 int result;
154
155#if THREADS
156 while (dv->thread_loop)
157#endif
158 {
159 while ((result = poll(&dv->raw1394_poll, 1, 200)) < 0) {
160 if (!(errno == EAGAIN || errno == EINTR)) {
161 av_log(NULL, AV_LOG_ERROR, "Raw1394 poll error occurred.\n");
162 dv->receive_error = AVERROR(EIO);
163 return NULL;
164 }
165 }
166 if (result > 0 && ((dv->raw1394_poll.revents & POLLIN)
167 || (dv->raw1394_poll.revents & POLLPRI))) {
168 dv->receiving = 1;
169 raw1394_loop_iterate(dv->raw1394);
170 } else if (dv->receiving) {
171 av_log(NULL, AV_LOG_ERROR, "No more input data available\n");
172#if THREADS
173 pthread_mutex_lock(&dv->mutex);
174 dv->eof = 1;
175 pthread_cond_broadcast(&dv->cond);
176 pthread_mutex_unlock(&dv->mutex);
177#else
178 dv->eof = 1;
179#endif
180 return NULL;
181 }
182 }
183
184 return NULL;
185}
186
187static int iec61883_parse_queue_dv(struct iec61883_data *dv, AVPacket *pkt)
188{
189 DVPacket *packet;
190 int size;
191
192 size = avpriv_dv_get_packet(dv->dv_demux, pkt);
193 if (size > 0)
194 return size;
195
196 packet = dv->queue_first;
197 if (!packet)
198 return -1;
199
200 size = avpriv_dv_produce_packet(dv->dv_demux, pkt,
201 packet->buf, packet->len, -1);
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
212static 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
233static 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, "%"SCNu64, &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 if (pthread_mutex_init(&dv->mutex, NULL))
396 goto fail;
397 if (pthread_cond_init(&dv->cond, NULL))
398 goto fail;
399 if (pthread_create(&dv->receive_task_thread, NULL, iec61883_receive_task, dv))
400 goto fail;
401#endif
402
403 return 0;
404
405fail:
406 raw1394_destroy_handle(dv->raw1394);
407 return AVERROR(EIO);
408}
409
410static int iec61883_read_packet(AVFormatContext *context, AVPacket *pkt)
411{
412 struct iec61883_data *dv = context->priv_data;
413 int size;
414
415 /**
416 * Try to parse frames from queue
417 */
418
419#if THREADS
420 pthread_mutex_lock(&dv->mutex);
421 while ((size = dv->parse_queue(dv, pkt)) == -1)
422 if (!dv->eof)
423 pthread_cond_wait(&dv->cond, &dv->mutex);
424 else
425 break;
426 pthread_mutex_unlock(&dv->mutex);
427#else
428 int result;
429 while ((size = dv->parse_queue(dv, pkt)) == -1) {
430 iec61883_receive_task((void *)dv);
431 if (dv->receive_error)
432 return dv->receive_error;
433 }
434#endif
435
436 return size;
437}
438
439static int iec61883_close(AVFormatContext *context)
440{
441 struct iec61883_data *dv = context->priv_data;
442
443#if THREADS
444 dv->thread_loop = 0;
445 pthread_join(dv->receive_task_thread, NULL);
446 pthread_cond_destroy(&dv->cond);
447 pthread_mutex_destroy(&dv->mutex);
448#endif
449
450 if (CONFIG_MPEGTS_DEMUXER && dv->type == IEC61883_HDV) {
451 iec61883_mpeg2_recv_stop(dv->iec61883_mpeg2);
452 iec61883_mpeg2_close(dv->iec61883_mpeg2);
453 avpriv_mpegts_parse_close(dv->mpeg_demux);
454 } else {
455 iec61883_dv_fb_stop(dv->iec61883_dv);
456 iec61883_dv_fb_close(dv->iec61883_dv);
457 }
458 while (dv->queue_first) {
459 DVPacket *packet = dv->queue_first;
460 dv->queue_first = packet->next;
461 av_freep(&packet->buf);
462 av_freep(&packet);
463 }
464
465 iec61883_cmp_disconnect(dv->raw1394, dv->node, dv->output_port,
466 raw1394_get_local_id(dv->raw1394),
467 dv->input_port, dv->channel, dv->bandwidth);
468
469 raw1394_destroy_handle(dv->raw1394);
470
471 return 0;
472}
473
474static const AVOption options[] = {
475 { "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" },
476 { "auto", "auto detect DV/HDV", 0, AV_OPT_TYPE_CONST, {.i64 = IEC61883_AUTO}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "dvtype" },
477 { "dv", "force device being treated as DV device", 0, AV_OPT_TYPE_CONST, {.i64 = IEC61883_DV}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "dvtype" },
478 { "hdv" , "force device being treated as HDV device", 0, AV_OPT_TYPE_CONST, {.i64 = IEC61883_HDV}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "dvtype" },
479 { "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 },
480 { "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 },
481 { NULL },
482};
483
484static const AVClass iec61883_class = {
485 .class_name = "iec61883 indev",
486 .item_name = av_default_item_name,
487 .option = options,
488 .version = LIBAVUTIL_VERSION_INT,
489 .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
490};
491
492AVInputFormat ff_iec61883_demuxer = {
493 .name = "iec61883",
494 .long_name = NULL_IF_CONFIG_SMALL("libiec61883 (new DV1394) A/V input device"),
495 .priv_data_size = sizeof(struct iec61883_data),
496 .read_header = iec61883_read_header,
497 .read_packet = iec61883_read_packet,
498 .read_close = iec61883_close,
499 .flags = AVFMT_NOFILE,
500 .priv_class = &iec61883_class,
501};
502
generated by cgit at 2024-05-17 18:35:51 (GMT)