mirror of
https://github.com/FFmpeg/FFmpeg.git
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262 lines
8.5 KiB
C
262 lines
8.5 KiB
C
/*
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* IIDC1394 grab interface (uses libdc1394 and libraw1394)
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* Copyright (c) 2004 Roman Shaposhnik
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* Copyright (c) 2008 Alessandro Sappia
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "avdevice.h"
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#include <dc1394/dc1394.h>
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#undef free
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typedef struct dc1394_data {
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AVClass *class;
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dc1394_t *d;
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dc1394camera_t *camera;
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dc1394video_frame_t *frame;
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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, DC1394_VIDEO_MODE_320x240_YUV422 },
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{ 640, 480, PIX_FMT_UYYVYY411, DC1394_VIDEO_MODE_640x480_YUV411 },
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{ 640, 480, PIX_FMT_UYVY422, DC1394_VIDEO_MODE_640x480_YUV422 },
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{ 0, 0, 0, 0 } /* 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, DC1394_FRAMERATE_1_875 },
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{ 3750, DC1394_FRAMERATE_3_75 },
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{ 7500, DC1394_FRAMERATE_7_5 },
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{ 15000, DC1394_FRAMERATE_15 },
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{ 30000, DC1394_FRAMERATE_30 },
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{ 60000, DC1394_FRAMERATE_60 },
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{120000, DC1394_FRAMERATE_120 },
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{240000, DC1394_FRAMERATE_240 },
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{ 0, 0 } /* gotta be the last one */
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};
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static const AVOption options[] = {
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#if HAVE_LIBDC1394_1
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{ "channel", "", offsetof(dc1394_data, channel), FF_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
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#endif
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{ NULL },
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};
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static const AVClass libdc1394_class = {
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.class_name = "libdc1394 indev",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static inline int dc1394_read_common(AVFormatContext *c, AVFormatParameters *ap,
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struct dc1394_frame_format **select_fmt, struct dc1394_frame_rate **select_fps)
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{
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dc1394_data* dc1394 = c->priv_data;
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AVStream* vst;
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struct dc1394_frame_format *fmt;
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struct dc1394_frame_rate *fps;
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enum PixelFormat pix_fmt = ap->pix_fmt == PIX_FMT_NONE ? PIX_FMT_UYVY422 : ap->pix_fmt; /* defaults */
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int width = !ap->width ? 320 : ap->width;
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int height = !ap->height ? 240 : ap->height;
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int frame_rate = !ap->time_base.num ? 30000 : av_rescale(1000, ap->time_base.den, ap->time_base.num);
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for (fmt = dc1394_frame_formats; fmt->width; fmt++)
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if (fmt->pix_fmt == pix_fmt && fmt->width == width && fmt->height == 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 == frame_rate)
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break;
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if (!fps->frame_rate || !fmt->width) {
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av_log(c, AV_LOG_ERROR, "Can't find matching camera format for %s, %dx%d@%d:1000fps\n", avcodec_get_pix_fmt_name(pix_fmt),
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width, height, frame_rate);
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goto out;
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}
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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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goto out;
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av_set_pts_info(vst, 64, 1, 1000);
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vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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vst->codec->codec_id = CODEC_ID_RAWVIDEO;
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vst->codec->time_base.den = fps->frame_rate;
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vst->codec->time_base.num = 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 |= AV_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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*select_fps = fps;
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*select_fmt = fmt;
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return 0;
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out:
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return -1;
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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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dc1394camera_list_t *list;
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int res, i;
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struct dc1394_frame_format *fmt = NULL;
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struct dc1394_frame_rate *fps = NULL;
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if (dc1394_read_common(c,ap,&fmt,&fps) != 0)
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return -1;
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/* Now let us prep the hardware. */
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dc1394->d = dc1394_new();
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dc1394_camera_enumerate (dc1394->d, &list);
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if ( !list || list->num == 0) {
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av_log(c, AV_LOG_ERROR, "Unable to look for an IIDC camera\n\n");
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goto out;
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}
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/* FIXME: To select a specific camera I need to search in list its guid */
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dc1394->camera = dc1394_camera_new (dc1394->d, list->ids[0].guid);
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if (list->num > 1) {
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av_log(c, AV_LOG_INFO, "Working with the first camera found\n");
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}
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/* Freeing list of cameras */
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dc1394_camera_free_list (list);
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/* Select MAX Speed possible from the cam */
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if (dc1394->camera->bmode_capable>0) {
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dc1394_video_set_operation_mode(dc1394->camera, DC1394_OPERATION_MODE_1394B);
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i = DC1394_ISO_SPEED_800;
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} else {
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i = DC1394_ISO_SPEED_400;
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}
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for (res = DC1394_FAILURE; i >= DC1394_ISO_SPEED_MIN && res != DC1394_SUCCESS; i--) {
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res=dc1394_video_set_iso_speed(dc1394->camera, i);
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}
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if (res != DC1394_SUCCESS) {
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av_log(c, AV_LOG_ERROR, "Couldn't set ISO Speed\n");
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goto out_camera;
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}
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if (dc1394_video_set_mode(dc1394->camera, fmt->frame_size_id) != DC1394_SUCCESS) {
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av_log(c, AV_LOG_ERROR, "Couldn't set video format\n");
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goto out_camera;
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}
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if (dc1394_video_set_framerate(dc1394->camera,fps->frame_rate_id) != DC1394_SUCCESS) {
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av_log(c, AV_LOG_ERROR, "Couldn't set framerate %d \n",fps->frame_rate);
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goto out_camera;
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}
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if (dc1394_capture_setup(dc1394->camera, 10, DC1394_CAPTURE_FLAGS_DEFAULT)!=DC1394_SUCCESS) {
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av_log(c, AV_LOG_ERROR, "Cannot setup camera \n");
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goto out_camera;
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}
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if (dc1394_video_set_transmission(dc1394->camera, DC1394_ON) !=DC1394_SUCCESS) {
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av_log(c, AV_LOG_ERROR, "Cannot start capture\n");
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goto out_camera;
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}
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return 0;
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out_camera:
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dc1394_capture_stop(dc1394->camera);
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dc1394_video_set_transmission(dc1394->camera, DC1394_OFF);
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dc1394_camera_free (dc1394->camera);
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out:
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dc1394_free(dc1394->d);
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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_capture_enqueue(dc1394->camera, dc1394->frame) != 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_capture_dequeue(dc1394->camera, DC1394_CAPTURE_POLICY_WAIT, &dc1394->frame);
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if (res == DC1394_SUCCESS) {
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dc1394->packet.data = (uint8_t *)(dc1394->frame->image);
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dc1394->packet.pts = (dc1394->current_frame * 1000000) / (dc1394->fps);
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res = dc1394->frame->image_bytes;
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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_video_set_transmission(dc1394->camera, DC1394_OFF);
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dc1394_capture_stop(dc1394->camera);
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dc1394_camera_free(dc1394->camera);
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dc1394_free(dc1394->d);
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return 0;
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}
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AVInputFormat ff_libdc1394_demuxer = {
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.name = "libdc1394",
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.long_name = NULL_IF_CONFIG_SMALL("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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.priv_class = &libdc1394_class,
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};
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