/* * IIDC1394 grab interface (uses libdc1394 and libraw1394) * Copyright (c) 2004 Roman Shaposhnik * Copyright (c) 2008 Alessandro Sappia * Copyright (c) 2011 Martin Lambers * * 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 */ #include "config.h" #include "libavformat/internal.h" #include "libavutil/log.h" #include "libavutil/mathematics.h" #include "libavutil/opt.h" #include "avdevice.h" #include <stdlib.h> #include <string.h> #include "libavutil/parseutils.h" #include "libavutil/pixdesc.h" #include <dc1394/dc1394.h> #undef free typedef struct dc1394_data { AVClass *class; dc1394_t *d; dc1394camera_t *camera; dc1394video_frame_t *frame; int current_frame; int frame_rate; /**< frames per 1000 seconds (fps * 1000) */ char *video_size; /**< String describing video size, set by a private option. */ char *pixel_format; /**< Set by a private option. */ char *framerate; /**< Set by a private option. */ AVPacket packet; } dc1394_data; /* The list of color codings that we support. * We assume big endian for the dc1394 16bit modes: libdc1394 never sets the * flag little_endian in dc1394video_frame_t. */ struct dc1394_color_coding { int pix_fmt; int score; uint32_t coding; } dc1394_color_codings[] = { { PIX_FMT_GRAY16BE, 1000, DC1394_COLOR_CODING_MONO16 }, { PIX_FMT_RGB48BE, 1100, DC1394_COLOR_CODING_RGB16 }, { PIX_FMT_GRAY8, 1200, DC1394_COLOR_CODING_MONO8 }, { PIX_FMT_RGB24, 1300, DC1394_COLOR_CODING_RGB8 }, { PIX_FMT_UYYVYY411, 1400, DC1394_COLOR_CODING_YUV411 }, { PIX_FMT_UYVY422, 1500, DC1394_COLOR_CODING_YUV422 }, { PIX_FMT_NONE, 0, 0 } /* gotta be the last one */ }; struct dc1394_frame_rate { int frame_rate; int frame_rate_id; } dc1394_frame_rates[] = { { 1875, DC1394_FRAMERATE_1_875 }, { 3750, DC1394_FRAMERATE_3_75 }, { 7500, DC1394_FRAMERATE_7_5 }, { 15000, DC1394_FRAMERATE_15 }, { 30000, DC1394_FRAMERATE_30 }, { 60000, DC1394_FRAMERATE_60 }, {120000, DC1394_FRAMERATE_120 }, {240000, DC1394_FRAMERATE_240 }, { 0, 0 } /* gotta be the last one */ }; #define OFFSET(x) offsetof(dc1394_data, x) #define DEC AV_OPT_FLAG_DECODING_PARAM static const AVOption options[] = { { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = "qvga"}, 0, 0, DEC }, { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "uyvy422"}, 0, 0, DEC }, { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC }, { NULL }, }; static const AVClass libdc1394_class = { .class_name = "libdc1394 indev", .item_name = av_default_item_name, .option = options, .version = LIBAVUTIL_VERSION_INT, }; static int dc1394_read_header(AVFormatContext *c, AVFormatParameters * ap) { dc1394_data* dc1394 = c->priv_data; AVStream *vst; const struct dc1394_color_coding *cc; const struct dc1394_frame_rate *fr; dc1394camera_list_t *list; dc1394video_modes_t video_modes; dc1394video_mode_t video_mode; dc1394framerates_t frame_rates; dc1394framerate_t frame_rate; uint32_t dc1394_width, dc1394_height, dc1394_color_coding; int rate, best_rate; int score, max_score; int final_width, final_height, final_pix_fmt, final_frame_rate; int res, i, j; int ret=-1; /* Now let us prep the hardware. */ dc1394->d = dc1394_new(); dc1394_camera_enumerate (dc1394->d, &list); if ( !list || list->num == 0) { av_log(c, AV_LOG_ERROR, "Unable to look for an IIDC camera\n\n"); goto out; } /* FIXME: To select a specific camera I need to search in list its guid */ dc1394->camera = dc1394_camera_new (dc1394->d, list->ids[0].guid); if (list->num > 1) { av_log(c, AV_LOG_INFO, "Working with the first camera found\n"); } /* Freeing list of cameras */ dc1394_camera_free_list (list); /* Get the list of video modes supported by the camera. */ res = dc1394_video_get_supported_modes (dc1394->camera, &video_modes); if (res != DC1394_SUCCESS) { av_log(c, AV_LOG_ERROR, "Could not get video formats.\n"); goto out_camera; } if (dc1394->pixel_format) { if ((ap->pix_fmt = av_get_pix_fmt(dc1394->pixel_format)) == PIX_FMT_NONE) { av_log(c, AV_LOG_ERROR, "No such pixel format: %s.\n", dc1394->pixel_format); ret = AVERROR(EINVAL); goto out; } } if (dc1394->video_size) { if ((ret = av_parse_video_size(&ap->width, &ap->height, dc1394->video_size)) < 0) { av_log(c, AV_LOG_ERROR, "Couldn't parse video size.\n"); goto out; } } /* Choose the best mode. */ rate = (ap->time_base.num ? av_rescale(1000, ap->time_base.den, ap->time_base.num) : -1); max_score = -1; for (i = 0; i < video_modes.num; i++) { if (video_modes.modes[i] == DC1394_VIDEO_MODE_EXIF || (video_modes.modes[i] >= DC1394_VIDEO_MODE_FORMAT7_MIN && video_modes.modes[i] <= DC1394_VIDEO_MODE_FORMAT7_MAX)) { /* These modes are currently not supported as they would require * much more work. For the remaining modes, the functions * dc1394_get_image_size_from_video_mode and * dc1394_get_color_coding_from_video_mode do not need to query the * camera, and thus cannot fail. */ continue; } dc1394_get_color_coding_from_video_mode (NULL, video_modes.modes[i], &dc1394_color_coding); for (cc = dc1394_color_codings; cc->pix_fmt != PIX_FMT_NONE; cc++) if (cc->coding == dc1394_color_coding) break; if (cc->pix_fmt == PIX_FMT_NONE) { /* We currently cannot handle this color coding. */ continue; } /* Here we know that the mode is supported. Get its frame size and the list * of frame rates supported by the camera for this mode. This list is sorted * in ascending order according to libdc1394 example programs. */ dc1394_get_image_size_from_video_mode (NULL, video_modes.modes[i], &dc1394_width, &dc1394_height); res = dc1394_video_get_supported_framerates (dc1394->camera, video_modes.modes[i], &frame_rates); if (res != DC1394_SUCCESS || frame_rates.num == 0) { av_log(c, AV_LOG_ERROR, "Cannot get frame rates for video mode.\n"); goto out_camera; } /* Choose the best frame rate. */ best_rate = -1; for (j = 0; j < frame_rates.num; j++) { for (fr = dc1394_frame_rates; fr->frame_rate; fr++) { if (fr->frame_rate_id == frame_rates.framerates[j]) { break; } } if (!fr->frame_rate) { /* This frame rate is not supported. */ continue; } best_rate = fr->frame_rate; frame_rate = fr->frame_rate_id; if (ap->time_base.num && rate == fr->frame_rate) { /* This is the requested frame rate. */ break; } } if (best_rate == -1) { /* No supported rate found. */ continue; } /* Here we know that both the mode and the rate are supported. Compute score. */ if (ap->width && ap->height && (dc1394_width == ap->width && dc1394_height == ap->height)) { score = 110000; } else { score = dc1394_width * 10; // 1600 - 16000 } if (ap->pix_fmt == cc->pix_fmt) { score += 90000; } else { score += cc->score; // 1000 - 1500 } if (ap->time_base.num && rate == best_rate) { score += 70000; } else { score += best_rate / 1000; // 1 - 240 } if (score > max_score) { video_mode = video_modes.modes[i]; final_width = dc1394_width; final_height = dc1394_height; final_pix_fmt = cc->pix_fmt; final_frame_rate = best_rate; max_score = score; } } if (max_score == -1) { av_log(c, AV_LOG_ERROR, "No suitable video mode / frame rate available.\n"); goto out_camera; } if (ap->width && ap->height && !(ap->width == final_width && ap->height == final_height)) { av_log(c, AV_LOG_WARNING, "Requested frame size is not available, using fallback.\n"); } if (ap->pix_fmt != PIX_FMT_NONE && ap->pix_fmt != final_pix_fmt) { av_log(c, AV_LOG_WARNING, "Requested pixel format is not supported, using fallback.\n"); } if (ap->time_base.num && rate != final_frame_rate) { av_log(c, AV_LOG_WARNING, "Requested frame rate is not available, using fallback.\n"); } /* create a video stream */ vst = avformat_new_stream(c, NULL); if (!vst) goto out_camera; avpriv_set_pts_info(vst, 64, 1, 1000); vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; vst->codec->codec_id = CODEC_ID_RAWVIDEO; vst->codec->time_base.den = final_frame_rate; vst->codec->time_base.num = 1000; vst->codec->width = final_width; vst->codec->height = final_height; vst->codec->pix_fmt = final_pix_fmt; /* packet init */ av_init_packet(&dc1394->packet); dc1394->packet.size = avpicture_get_size(final_pix_fmt, final_width, final_height); dc1394->packet.stream_index = vst->index; dc1394->packet.flags |= AV_PKT_FLAG_KEY; dc1394->current_frame = 0; dc1394->frame_rate = final_frame_rate; vst->codec->bit_rate = av_rescale(dc1394->packet.size * 8, final_frame_rate, 1000); /* Select MAX Speed possible from the cam */ if (dc1394->camera->bmode_capable>0) { dc1394_video_set_operation_mode(dc1394->camera, DC1394_OPERATION_MODE_1394B); i = DC1394_ISO_SPEED_800; } else { i = DC1394_ISO_SPEED_400; } for (res = DC1394_FAILURE; i >= DC1394_ISO_SPEED_MIN && res != DC1394_SUCCESS; i--) { res=dc1394_video_set_iso_speed(dc1394->camera, i); } if (res != DC1394_SUCCESS) { av_log(c, AV_LOG_ERROR, "Couldn't set ISO Speed\n"); goto out_camera; } if (dc1394_video_set_mode(dc1394->camera, video_mode) != DC1394_SUCCESS) { av_log(c, AV_LOG_ERROR, "Couldn't set video format\n"); goto out_camera; } if (dc1394_video_set_framerate(dc1394->camera, frame_rate) != DC1394_SUCCESS) { av_log(c, AV_LOG_ERROR, "Could not set framerate %d.\n", final_frame_rate); goto out_camera; } if (dc1394_capture_setup(dc1394->camera, 10, DC1394_CAPTURE_FLAGS_DEFAULT)!=DC1394_SUCCESS) { av_log(c, AV_LOG_ERROR, "Cannot setup camera \n"); goto out_camera; } if (dc1394_video_set_transmission(dc1394->camera, DC1394_ON) !=DC1394_SUCCESS) { av_log(c, AV_LOG_ERROR, "Cannot start capture\n"); goto out_camera; } return 0; out_camera: dc1394_capture_stop(dc1394->camera); dc1394_video_set_transmission(dc1394->camera, DC1394_OFF); dc1394_camera_free (dc1394->camera); out: dc1394_free(dc1394->d); return ret; } static int dc1394_read_packet(AVFormatContext *c, AVPacket *pkt) { struct dc1394_data *dc1394 = c->priv_data; int res; /* discard stale frame */ if (dc1394->current_frame++) { if (dc1394_capture_enqueue(dc1394->camera, dc1394->frame) != DC1394_SUCCESS) av_log(c, AV_LOG_ERROR, "failed to release %d frame\n", dc1394->current_frame); } res = dc1394_capture_dequeue(dc1394->camera, DC1394_CAPTURE_POLICY_WAIT, &dc1394->frame); if (res == DC1394_SUCCESS) { dc1394->packet.data = (uint8_t *) dc1394->frame->image; dc1394->packet.pts = dc1394->current_frame * 1000000 / dc1394->frame_rate; res = dc1394->frame->image_bytes; } else { av_log(c, AV_LOG_ERROR, "DMA capture failed\n"); dc1394->packet.data = NULL; res = -1; } *pkt = dc1394->packet; return res; } static int dc1394_close(AVFormatContext * context) { struct dc1394_data *dc1394 = context->priv_data; dc1394_video_set_transmission(dc1394->camera, DC1394_OFF); dc1394_capture_stop(dc1394->camera); dc1394_camera_free(dc1394->camera); dc1394_free(dc1394->d); return 0; } AVInputFormat ff_libdc1394_demuxer = { .name = "libdc1394", .long_name = NULL_IF_CONFIG_SMALL("dc1394 A/V grab"), .priv_data_size = sizeof(struct dc1394_data), .read_header = dc1394_read_header, .read_packet = dc1394_read_packet, .read_close = dc1394_close, .flags = AVFMT_NOFILE, .priv_class = &libdc1394_class, };