mirror of https://github.com/FFmpeg/FFmpeg.git
Use it with -grab dc1394
* Introducing yet another packed pix_fmt in order to support some of
the IIDC1394 modes: uyvy411 (Cb Y0 Y1 Cr Y2 Y3).
Originally committed as revision 3621 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Roman Shaposhnik
20 years ago
parent
5ba7c3d7c9
commit
f02be79d61
9 changed files with 288 additions and 0 deletions
@ -0,0 +1,197 @@ |
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/*
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* IIDC1394 grab interface (uses libdc1394 and libraw1394) |
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* Copyright (c) 2004 Roman Shaposhnik |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#include "avformat.h" |
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#include <libraw1394/raw1394.h> |
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#include <libdc1394/dc1394_control.h> |
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#undef free |
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typedef struct dc1394_data { |
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raw1394handle_t handle; |
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dc1394_cameracapture camera; |
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int current_frame; |
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int fps; |
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AVPacket packet; |
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} dc1394_data; |
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struct dc1394_frame_format { |
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int width; |
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int height; |
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enum PixelFormat pix_fmt; |
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int frame_size_id; |
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} dc1394_frame_formats[] = { |
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{ 320, 240, PIX_FMT_UYVY422, MODE_320x240_YUV422 }, |
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{ 640, 480, PIX_FMT_UYVY411, MODE_640x480_YUV411 }, |
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{ 640, 480, PIX_FMT_UYVY422, MODE_640x480_YUV422 }, |
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{ 0, 0, 0, MODE_320x240_YUV422 } /* default -- gotta be the last one */ |
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}; |
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struct dc1394_frame_rate { |
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int frame_rate; |
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int frame_rate_id; |
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} dc1394_frame_rates[] = { |
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{ 1875, FRAMERATE_1_875 }, |
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{ 3750, FRAMERATE_3_75 }, |
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{ 7500, FRAMERATE_7_5 }, |
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{ 15000, FRAMERATE_15 }, |
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{ 30000, FRAMERATE_30 }, |
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{ 60000, FRAMERATE_60 }, |
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{ 0, FRAMERATE_30 } /* default -- gotta be the last one */ |
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}; |
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static int dc1394_read_header(AVFormatContext *c, AVFormatParameters * ap) |
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{ |
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dc1394_data* dc1394 = c->priv_data; |
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AVStream* vst; |
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nodeid_t* camera_nodes; |
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int res; |
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struct dc1394_frame_format *fmt; |
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struct dc1394_frame_rate *fps; |
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for (fmt = dc1394_frame_formats; fmt->width; fmt++) |
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if (fmt->pix_fmt == ap->pix_fmt && fmt->width == ap->width && fmt->height == ap->height) |
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break; |
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for (fps = dc1394_frame_rates; fps->frame_rate; fps++) |
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if (fps->frame_rate == av_rescale(1000, ap->frame_rate, ap->frame_rate_base)) |
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break; |
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/* create a video stream */ |
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vst = av_new_stream(c, 0); |
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if (!vst) |
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return -1; |
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av_set_pts_info(vst, 64, 1, 1000); |
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vst->codec.codec_type = CODEC_TYPE_VIDEO; |
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vst->codec.codec_id = CODEC_ID_RAWVIDEO; |
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vst->codec.frame_rate = fps->frame_rate; |
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vst->codec.frame_rate_base = 1000; |
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vst->codec.width = fmt->width; |
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vst->codec.height = fmt->height; |
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vst->codec.pix_fmt = fmt->pix_fmt; |
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/* packet init */ |
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av_init_packet(&dc1394->packet); |
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dc1394->packet.size = avpicture_get_size(fmt->pix_fmt, fmt->width, fmt->height); |
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dc1394->packet.stream_index = vst->index; |
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dc1394->packet.flags |= PKT_FLAG_KEY; |
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dc1394->current_frame = 0; |
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dc1394->fps = fps->frame_rate; |
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vst->codec.bit_rate = av_rescale(dc1394->packet.size * 8, fps->frame_rate, 1000); |
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/* Now lets prep the hardware */ |
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dc1394->handle = dc1394_create_handle(0); /* FIXME: gotta have ap->port */ |
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if (!dc1394->handle) { |
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av_log(c, AV_LOG_ERROR, "Can't aquire dc1394 handle on port %d\n", 0 /* ap->port */); |
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goto out; |
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} |
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camera_nodes = dc1394_get_camera_nodes(dc1394->handle, &res, 1); |
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if (!camera_nodes || camera_nodes[ap->channel] == DC1394_NO_CAMERA) { |
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av_log(c, AV_LOG_ERROR, "There's no IIDC camera on the channel %d\n", ap->channel); |
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goto out_handle;
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} |
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res = dc1394_dma_setup_capture(dc1394->handle, camera_nodes[ap->channel],
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0, |
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FORMAT_VGA_NONCOMPRESSED, |
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fmt->frame_size_id, |
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SPEED_400, |
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fps->frame_rate_id, 8, 1,
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ap->device,
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&dc1394->camera); |
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dc1394_free_camera_nodes(camera_nodes); |
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if (res != DC1394_SUCCESS) { |
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av_log(c, AV_LOG_ERROR, "Can't prepare camera for the DMA capture\n"); |
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goto out_handle; |
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} |
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res = dc1394_start_iso_transmission(dc1394->handle, dc1394->camera.node); |
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if (res != DC1394_SUCCESS) { |
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av_log(c, AV_LOG_ERROR, "Can't start isochronous transmission\n"); |
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goto out_handle_dma; |
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} |
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return 0; |
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out_handle_dma: |
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dc1394_dma_unlisten(dc1394->handle, &dc1394->camera); |
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dc1394_dma_release_camera(dc1394->handle, &dc1394->camera); |
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out_handle: |
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dc1394_destroy_handle(dc1394->handle); |
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out: |
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return -1; |
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} |
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static int dc1394_read_packet(AVFormatContext *c, AVPacket *pkt) |
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{ |
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struct dc1394_data *dc1394 = c->priv_data; |
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int res; |
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/* discard stale frame */ |
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if (dc1394->current_frame++) { |
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if (dc1394_dma_done_with_buffer(&dc1394->camera) != DC1394_SUCCESS) |
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av_log(c, AV_LOG_ERROR, "failed to release %d frame\n", dc1394->current_frame); |
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} |
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res = dc1394_dma_single_capture(&dc1394->camera); |
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if (res == DC1394_SUCCESS) { |
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dc1394->packet.data = (uint8_t *)(dc1394->camera.capture_buffer);
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dc1394->packet.pts = (dc1394->current_frame * 1000000) / dc1394->fps;
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res = dc1394->packet.size; |
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} else { |
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av_log(c, AV_LOG_ERROR, "DMA capture failed\n"); |
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dc1394->packet.data = NULL; |
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res = -1;
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} |
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*pkt = dc1394->packet; |
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return res; |
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} |
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static int dc1394_close(AVFormatContext * context) |
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{ |
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struct dc1394_data *dc1394 = context->priv_data; |
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dc1394_stop_iso_transmission(dc1394->handle, dc1394->camera.node); |
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dc1394_dma_unlisten(dc1394->handle, &dc1394->camera); |
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dc1394_dma_release_camera(dc1394->handle, &dc1394->camera); |
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dc1394_destroy_handle(dc1394->handle); |
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return 0; |
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} |
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static AVInputFormat dc1394_format = { |
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.name = "dc1394", |
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.long_name = "dc1394 A/V grab", |
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.priv_data_size = sizeof(struct dc1394_data), |
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.read_header = dc1394_read_header, |
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.read_packet = dc1394_read_packet, |
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.read_close = dc1394_close, |
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.flags = AVFMT_NOFILE |
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}; |
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int dc1394_init(void) |
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{ |
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av_register_input_format(&dc1394_format); |
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return 0; |
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} |
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