/* * IIDC1394 grab interface (uses libdc1394 and libraw1394) * Copyright (c) 2004 Roman Shaposhnik * * 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 "avformat.h" #include <libraw1394/raw1394.h> #include <libdc1394/dc1394_control.h> #undef free typedef struct dc1394_data { raw1394handle_t handle; dc1394_cameracapture camera; int current_frame; int fps; AVPacket packet; } dc1394_data; struct dc1394_frame_format { int width; int height; enum PixelFormat pix_fmt; int frame_size_id; } dc1394_frame_formats[] = { { 320, 240, PIX_FMT_UYVY422, MODE_320x240_YUV422 }, { 640, 480, PIX_FMT_UYYVYY411, MODE_640x480_YUV411 }, { 640, 480, PIX_FMT_UYVY422, MODE_640x480_YUV422 }, { 0, 0, 0, MODE_320x240_YUV422 } /* default -- gotta be the last one */ }; struct dc1394_frame_rate { int frame_rate; int frame_rate_id; } dc1394_frame_rates[] = { { 1875, FRAMERATE_1_875 }, { 3750, FRAMERATE_3_75 }, { 7500, FRAMERATE_7_5 }, { 15000, FRAMERATE_15 }, { 30000, FRAMERATE_30 }, { 60000, FRAMERATE_60 }, { 0, FRAMERATE_30 } /* default -- gotta be the last one */ }; static int dc1394_read_header(AVFormatContext *c, AVFormatParameters * ap) { dc1394_data* dc1394 = c->priv_data; AVStream* vst; nodeid_t* camera_nodes; int res; struct dc1394_frame_format *fmt; struct dc1394_frame_rate *fps; for (fmt = dc1394_frame_formats; fmt->width; fmt++) if (fmt->pix_fmt == ap->pix_fmt && fmt->width == ap->width && fmt->height == ap->height) break; for (fps = dc1394_frame_rates; fps->frame_rate; fps++) if (fps->frame_rate == av_rescale(1000, ap->time_base.den, ap->time_base.num)) break; /* create a video stream */ vst = av_new_stream(c, 0); if (!vst) return -1; av_set_pts_info(vst, 64, 1, 1000); vst->codec->codec_type = CODEC_TYPE_VIDEO; vst->codec->codec_id = CODEC_ID_RAWVIDEO; vst->codec->time_base.den = fps->frame_rate; vst->codec->time_base.num = 1000; vst->codec->width = fmt->width; vst->codec->height = fmt->height; vst->codec->pix_fmt = fmt->pix_fmt; /* packet init */ av_init_packet(&dc1394->packet); dc1394->packet.size = avpicture_get_size(fmt->pix_fmt, fmt->width, fmt->height); dc1394->packet.stream_index = vst->index; dc1394->packet.flags |= PKT_FLAG_KEY; dc1394->current_frame = 0; dc1394->fps = fps->frame_rate; vst->codec->bit_rate = av_rescale(dc1394->packet.size * 8, fps->frame_rate, 1000); /* Now lets prep the hardware */ dc1394->handle = dc1394_create_handle(0); /* FIXME: gotta have ap->port */ if (!dc1394->handle) { av_log(c, AV_LOG_ERROR, "Can't acquire dc1394 handle on port %d\n", 0 /* ap->port */); goto out; } camera_nodes = dc1394_get_camera_nodes(dc1394->handle, &res, 1); if (!camera_nodes || camera_nodes[ap->channel] == DC1394_NO_CAMERA) { av_log(c, AV_LOG_ERROR, "There's no IIDC camera on the channel %d\n", ap->channel); goto out_handle; } res = dc1394_dma_setup_capture(dc1394->handle, camera_nodes[ap->channel], 0, FORMAT_VGA_NONCOMPRESSED, fmt->frame_size_id, SPEED_400, fps->frame_rate_id, 8, 1, c->filename, &dc1394->camera); dc1394_free_camera_nodes(camera_nodes); if (res != DC1394_SUCCESS) { av_log(c, AV_LOG_ERROR, "Can't prepare camera for the DMA capture\n"); goto out_handle; } res = dc1394_start_iso_transmission(dc1394->handle, dc1394->camera.node); if (res != DC1394_SUCCESS) { av_log(c, AV_LOG_ERROR, "Can't start isochronous transmission\n"); goto out_handle_dma; } return 0; out_handle_dma: dc1394_dma_unlisten(dc1394->handle, &dc1394->camera); dc1394_dma_release_camera(dc1394->handle, &dc1394->camera); out_handle: dc1394_destroy_handle(dc1394->handle); out: return -1; } 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_dma_done_with_buffer(&dc1394->camera) != DC1394_SUCCESS) av_log(c, AV_LOG_ERROR, "failed to release %d frame\n", dc1394->current_frame); } res = dc1394_dma_single_capture(&dc1394->camera); if (res == DC1394_SUCCESS) { dc1394->packet.data = (uint8_t *)(dc1394->camera.capture_buffer); dc1394->packet.pts = (dc1394->current_frame * 1000000) / dc1394->fps; res = dc1394->packet.size; } 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_stop_iso_transmission(dc1394->handle, dc1394->camera.node); dc1394_dma_unlisten(dc1394->handle, &dc1394->camera); dc1394_dma_release_camera(dc1394->handle, &dc1394->camera); dc1394_destroy_handle(dc1394->handle); return 0; } AVInputFormat dc1394_demuxer = { .name = "dc1394", .long_name = "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 };