/* * Copyright (c) 2012 Georg Lippitsch <georg.lippitsch@gmx.at> * * 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 */ /** * @file * libiec61883 interface */ #include <sys/poll.h> #include <libraw1394/raw1394.h> #include <libavc1394/avc1394.h> #include <libavc1394/rom1394.h> #include <libiec61883/iec61883.h> #include "libavformat/dv.h" #include "libavformat/mpegts.h" #include "libavutil/opt.h" #include "avdevice.h" #define THREADS HAVE_PTHREADS #if THREADS #include <pthread.h> #endif #define MOTDCT_SPEC_ID 0x00005068 #define IEC61883_AUTO 0 #define IEC61883_DV 1 #define IEC61883_HDV 2 /** * For DV, one packet corresponds exactly to one frame. * For HDV, these are MPEG2 transport stream packets. * The queue is implemented as linked list. */ typedef struct DVPacket { uint8_t *buf; ///< actual buffer data int len; ///< size of buffer allocated struct DVPacket *next; ///< next DVPacket } DVPacket; struct iec61883_data { AVClass *class; raw1394handle_t raw1394; ///< handle for libraw1394 iec61883_dv_fb_t iec61883_dv; ///< handle for libiec61883 when used with DV iec61883_mpeg2_t iec61883_mpeg2; ///< handle for libiec61883 when used with HDV DVDemuxContext *dv_demux; ///< generic DV muxing/demuxing context MpegTSContext *mpeg_demux; ///< generic HDV muxing/demuxing context DVPacket *queue_first; ///< first element of packet queue DVPacket *queue_last; ///< last element of packet queue char *device_guid; ///< to select one of multiple DV devices int packets; ///< Number of packets queued int max_packets; ///< Max. number of packets in queue int bandwidth; ///< returned by libiec61883 int channel; ///< returned by libiec61883 int input_port; ///< returned by libiec61883 int type; ///< Stream type, to distinguish DV/HDV int node; ///< returned by libiec61883 int output_port; ///< returned by libiec61883 int thread_loop; ///< Condition for thread while-loop int receiving; ///< True as soon data from device available int receive_error; ///< Set in receive task in case of error int eof; ///< True as soon as no more data available struct pollfd raw1394_poll; ///< to poll for new data from libraw1394 /** Parse function for DV/HDV differs, so this is set before packets arrive */ int (*parse_queue)(struct iec61883_data *dv, AVPacket *pkt); #if THREADS pthread_t receive_task_thread; pthread_mutex_t mutex; pthread_cond_t cond; #endif }; static int iec61883_callback(unsigned char *data, int length, int complete, void *callback_data) { struct iec61883_data *dv = callback_data; DVPacket *packet; int ret; #if THREADS pthread_mutex_lock(&dv->mutex); #endif if (dv->packets >= dv->max_packets) { av_log(NULL, AV_LOG_ERROR, "DV packet queue overrun, dropping.\n"); ret = 0; goto exit; } packet = av_mallocz(sizeof(*packet)); if (!packet) { ret = -1; goto exit; } packet->buf = av_malloc(length); if (!packet->buf) { ret = -1; goto exit; } packet->len = length; memcpy(packet->buf, data, length); if (dv->queue_first) { dv->queue_last->next = packet; dv->queue_last = packet; } else { dv->queue_first = packet; dv->queue_last = packet; } dv->packets++; ret = 0; exit: #if THREADS pthread_cond_broadcast(&dv->cond); pthread_mutex_unlock(&dv->mutex); #endif return ret; } static void *iec61883_receive_task(void *opaque) { struct iec61883_data *dv = (struct iec61883_data *)opaque; int result; #if THREADS while (dv->thread_loop) #endif { while ((result = poll(&dv->raw1394_poll, 1, 200)) < 0) { if (!(errno == EAGAIN || errno == EINTR)) { av_log(NULL, AV_LOG_ERROR, "Raw1394 poll error occurred.\n"); dv->receive_error = AVERROR(EIO); return NULL; } } if (result > 0 && ((dv->raw1394_poll.revents & POLLIN) || (dv->raw1394_poll.revents & POLLPRI))) { dv->receiving = 1; raw1394_loop_iterate(dv->raw1394); } else if (dv->receiving) { av_log(NULL, AV_LOG_ERROR, "No more input data available\n"); #if THREADS pthread_mutex_lock(&dv->mutex); dv->eof = 1; pthread_cond_broadcast(&dv->cond); pthread_mutex_unlock(&dv->mutex); #else dv->eof = 1; #endif return NULL; } } return NULL; } static int iec61883_parse_queue_dv(struct iec61883_data *dv, AVPacket *pkt) { DVPacket *packet; int size; size = avpriv_dv_get_packet(dv->dv_demux, pkt); if (size > 0) return size; packet = dv->queue_first; if (!packet) return -1; size = avpriv_dv_produce_packet(dv->dv_demux, pkt, packet->buf, packet->len, -1); pkt->destruct = av_destruct_packet; dv->queue_first = packet->next; av_free(packet); dv->packets--; if (size > 0) return size; return -1; } static int iec61883_parse_queue_hdv(struct iec61883_data *dv, AVPacket *pkt) { DVPacket *packet; int size; while (dv->queue_first) { packet = dv->queue_first; size = avpriv_mpegts_parse_packet(dv->mpeg_demux, pkt, packet->buf, packet->len); dv->queue_first = packet->next; av_freep(&packet->buf); av_freep(&packet); dv->packets--; if (size > 0) return size; } return -1; } static int iec61883_read_header(AVFormatContext *context) { struct iec61883_data *dv = context->priv_data; struct raw1394_portinfo pinf[16]; rom1394_directory rom_dir; char *endptr; int inport; int nb_ports; int port = -1; int response; int i, j = 0; uint64_t guid = 0; dv->input_port = -1; dv->output_port = -1; dv->channel = -1; dv->raw1394 = raw1394_new_handle(); if (!dv->raw1394) { av_log(context, AV_LOG_ERROR, "Failed to open IEEE1394 interface.\n"); return AVERROR(EIO); } if ((nb_ports = raw1394_get_port_info(dv->raw1394, pinf, 16)) < 0) { av_log(context, AV_LOG_ERROR, "Failed to get number of IEEE1394 ports.\n"); goto fail; } inport = strtol(context->filename, &endptr, 10); if (endptr != context->filename && *endptr == '\0') { av_log(context, AV_LOG_INFO, "Selecting IEEE1394 port: %d\n", inport); j = inport; nb_ports = inport + 1; } else if (strcmp(context->filename, "auto")) { av_log(context, AV_LOG_ERROR, "Invalid input \"%s\", you should specify " "\"auto\" for auto-detection, or the port number.\n", context->filename); goto fail; } if (dv->device_guid) { if (sscanf(dv->device_guid, "%"SCNu64, &guid) != 1) { av_log(context, AV_LOG_INFO, "Invalid dvguid parameter: %s\n", dv->device_guid); goto fail; } } for (; j < nb_ports && port==-1; ++j) { raw1394_destroy_handle(dv->raw1394); if (!(dv->raw1394 = raw1394_new_handle_on_port(j))) { av_log(context, AV_LOG_ERROR, "Failed setting IEEE1394 port.\n"); goto fail; } for (i=0; i<raw1394_get_nodecount(dv->raw1394); ++i) { /* Select device explicitly by GUID */ if (guid > 1) { if (guid == rom1394_get_guid(dv->raw1394, i)) { dv->node = i; port = j; break; } } else { /* Select first AV/C tape recorder player node */ if (rom1394_get_directory(dv->raw1394, i, &rom_dir) < 0) continue; if (((rom1394_get_node_type(&rom_dir) == ROM1394_NODE_TYPE_AVC) && avc1394_check_subunit_type(dv->raw1394, i, AVC1394_SUBUNIT_TYPE_VCR)) || (rom_dir.unit_spec_id == MOTDCT_SPEC_ID)) { rom1394_free_directory(&rom_dir); dv->node = i; port = j; break; } rom1394_free_directory(&rom_dir); } } } if (port == -1) { av_log(context, AV_LOG_ERROR, "No AV/C devices found.\n"); goto fail; } /* Provide bus sanity for multiple connections */ iec61883_cmp_normalize_output(dv->raw1394, 0xffc0 | dv->node); /* Find out if device is DV or HDV */ if (dv->type == IEC61883_AUTO) { response = avc1394_transaction(dv->raw1394, dv->node, AVC1394_CTYPE_STATUS | AVC1394_SUBUNIT_TYPE_TAPE_RECORDER | AVC1394_SUBUNIT_ID_0 | AVC1394_VCR_COMMAND_OUTPUT_SIGNAL_MODE | 0xFF, 2); response = AVC1394_GET_OPERAND0(response); dv->type = (response == 0x10 || response == 0x90 || response == 0x1A || response == 0x9A) ? IEC61883_HDV : IEC61883_DV; } /* Connect to device, and do initialization */ dv->channel = iec61883_cmp_connect(dv->raw1394, dv->node, &dv->output_port, raw1394_get_local_id(dv->raw1394), &dv->input_port, &dv->bandwidth); if (dv->channel < 0) dv->channel = 63; if (!dv->max_packets) dv->max_packets = 100; if (CONFIG_MPEGTS_DEMUXER && dv->type == IEC61883_HDV) { /* Init HDV receive */ avformat_new_stream(context, NULL); dv->mpeg_demux = avpriv_mpegts_parse_open(context); if (!dv->mpeg_demux) goto fail; dv->parse_queue = iec61883_parse_queue_hdv; dv->iec61883_mpeg2 = iec61883_mpeg2_recv_init(dv->raw1394, (iec61883_mpeg2_recv_t)iec61883_callback, dv); dv->max_packets *= 766; } else { /* Init DV receive */ dv->dv_demux = avpriv_dv_init_demux(context); if (!dv->dv_demux) goto fail; dv->parse_queue = iec61883_parse_queue_dv; dv->iec61883_dv = iec61883_dv_fb_init(dv->raw1394, iec61883_callback, dv); } dv->raw1394_poll.fd = raw1394_get_fd(dv->raw1394); dv->raw1394_poll.events = POLLIN | POLLERR | POLLHUP | POLLPRI; /* Actually start receiving */ if (dv->type == IEC61883_HDV) iec61883_mpeg2_recv_start(dv->iec61883_mpeg2, dv->channel); else iec61883_dv_fb_start(dv->iec61883_dv, dv->channel); #if THREADS dv->thread_loop = 1; if (pthread_mutex_init(&dv->mutex, NULL)) goto fail; if (pthread_cond_init(&dv->cond, NULL)) goto fail; if (pthread_create(&dv->receive_task_thread, NULL, iec61883_receive_task, dv)) goto fail; #endif return 0; fail: raw1394_destroy_handle(dv->raw1394); return AVERROR(EIO); } static int iec61883_read_packet(AVFormatContext *context, AVPacket *pkt) { struct iec61883_data *dv = context->priv_data; int size; /** * Try to parse frames from queue */ #if THREADS pthread_mutex_lock(&dv->mutex); while ((size = dv->parse_queue(dv, pkt)) == -1) if (!dv->eof) pthread_cond_wait(&dv->cond, &dv->mutex); else break; pthread_mutex_unlock(&dv->mutex); #else int result; while ((size = dv->parse_queue(dv, pkt)) == -1) { iec61883_receive_task((void *)dv); if (dv->receive_error) return dv->receive_error; } #endif return size; } static int iec61883_close(AVFormatContext *context) { struct iec61883_data *dv = context->priv_data; #if THREADS dv->thread_loop = 0; pthread_join(dv->receive_task_thread, NULL); pthread_cond_destroy(&dv->cond); pthread_mutex_destroy(&dv->mutex); #endif if (CONFIG_MPEGTS_DEMUXER && dv->type == IEC61883_HDV) { iec61883_mpeg2_recv_stop(dv->iec61883_mpeg2); iec61883_mpeg2_close(dv->iec61883_mpeg2); avpriv_mpegts_parse_close(dv->mpeg_demux); } else { iec61883_dv_fb_stop(dv->iec61883_dv); iec61883_dv_fb_close(dv->iec61883_dv); } while (dv->queue_first) { DVPacket *packet = dv->queue_first; dv->queue_first = packet->next; av_freep(&packet->buf); av_freep(&packet); } iec61883_cmp_disconnect(dv->raw1394, dv->node, dv->output_port, raw1394_get_local_id(dv->raw1394), dv->input_port, dv->channel, dv->bandwidth); raw1394_destroy_handle(dv->raw1394); return 0; } static const AVOption options[] = { { "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" }, { "auto", "auto detect DV/HDV", 0, AV_OPT_TYPE_CONST, {.i64 = IEC61883_AUTO}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "dvtype" }, { "dv", "force device being treated as DV device", 0, AV_OPT_TYPE_CONST, {.i64 = IEC61883_DV}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "dvtype" }, { "hdv" , "force device being treated as HDV device", 0, AV_OPT_TYPE_CONST, {.i64 = IEC61883_HDV}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "dvtype" }, { "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 }, { "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 }, { NULL }, }; static const AVClass iec61883_class = { .class_name = "iec61883 indev", .item_name = av_default_item_name, .option = options, .version = LIBAVUTIL_VERSION_INT, .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT, }; AVInputFormat ff_iec61883_demuxer = { .name = "iec61883", .long_name = NULL_IF_CONFIG_SMALL("libiec61883 (new DV1394) A/V input device"), .priv_data_size = sizeof(struct iec61883_data), .read_header = iec61883_read_header, .read_packet = iec61883_read_packet, .read_close = iec61883_close, .flags = AVFMT_NOFILE, .priv_class = &iec61883_class, };