libavdevice/libdc1394.c

   1 /*
   2  * IIDC1394 grab interface (uses libdc1394 and libraw1394)
   3  * Copyright (c) 2004 Roman Shaposhnik
   4  * Copyright (c) 2008 Alessandro Sappia
   5  *
   6  * This file is part of Libav.
   7  *
   8  * Libav is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * Libav is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with Libav; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include <dc1394/dc1394.h>
  24
  25 #include "libavutil/imgutils.h"
  26 #include "libavutil/internal.h"
  27 #include "libavutil/log.h"
  28 #include "libavutil/mathematics.h"
  29 #include "libavutil/opt.h"
  30 #include "libavutil/parseutils.h"
  31 #include "libavutil/pixdesc.h"
  32
  33 #include "libavformat/avformat.h"
  34 #include "libavformat/internal.h"
  35
  36 typedef struct dc1394_data {
  37     AVClass *class;
  38     dc1394_t *d;
  39     dc1394camera_t *camera;
  40     dc1394video_frame_t *frame;
  41     int current_frame;
  42     int  frame_rate;        /**< frames per 1000 seconds (fps * 1000) */
  43     char *video_size;       /**< String describing video size, set by a private option. */
  44     char *pixel_format;     /**< Set by a private option. */
  45     char *framerate;        /**< Set by a private option. */
  46
  47     int size;
  48     int stream_index;
  49 } dc1394_data;
  50
  51 struct dc1394_frame_format {
  52     int width;
  53     int height;
  54     enum AVPixelFormat pix_fmt;
  55     int frame_size_id;
  56 } dc1394_frame_formats[] = {
  57     { 320, 240, AV_PIX_FMT_UYVY422,   DC1394_VIDEO_MODE_320x240_YUV422 },
  58     { 640, 480, AV_PIX_FMT_GRAY8,     DC1394_VIDEO_MODE_640x480_MONO8 },
  59     { 640, 480, AV_PIX_FMT_UYYVYY411, DC1394_VIDEO_MODE_640x480_YUV411 },
  60     { 640, 480, AV_PIX_FMT_UYVY422,   DC1394_VIDEO_MODE_640x480_YUV422 },
  61     { 0, 0, 0, 0 } /* gotta be the last one */
  62 };
  63
  64 struct dc1394_frame_rate {
  65     int frame_rate;
  66     int frame_rate_id;
  67 } dc1394_frame_rates[] = {
  68     {  1875, DC1394_FRAMERATE_1_875 },
  69     {  3750, DC1394_FRAMERATE_3_75  },
  70     {  7500, DC1394_FRAMERATE_7_5   },
  71     { 15000, DC1394_FRAMERATE_15    },
  72     { 30000, DC1394_FRAMERATE_30    },
  73     { 60000, DC1394_FRAMERATE_60    },
  74     {120000, DC1394_FRAMERATE_120   },
  75     {240000, DC1394_FRAMERATE_240    },
  76     { 0, 0 } /* gotta be the last one */
  77 };
  78
  79 #define OFFSET(x) offsetof(dc1394_data, x)
  80 #define DEC AV_OPT_FLAG_DECODING_PARAM
  81 static const AVOption options[] = {
  82     { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = "qvga"}, 0, 0, DEC },
  83     { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "uyvy422"}, 0, 0, DEC },
  84     { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC },
  85     { NULL },
  86 };
  87
  88 static const AVClass libdc1394_class = {
  89     .class_name = "libdc1394 indev",
  90     .item_name  = av_default_item_name,
  91     .option     = options,
  92     .version    = LIBAVUTIL_VERSION_INT,
  93 };
  94
  95
  96 static inline int dc1394_read_common(AVFormatContext *c,
  97                                      struct dc1394_frame_format **select_fmt, struct dc1394_frame_rate **select_fps)
  98 {
  99     dc1394_data* dc1394 = c->priv_data;
 100     AVStream* vst;
 101     struct dc1394_frame_format *fmt;
 102     struct dc1394_frame_rate *fps;
 103     enum AVPixelFormat pix_fmt;
 104     int width, height;
 105     AVRational framerate;
 106     int ret = 0;
 107
 108     if ((pix_fmt = av_get_pix_fmt(dc1394->pixel_format)) == AV_PIX_FMT_NONE) {
 109         av_log(c, AV_LOG_ERROR, "No such pixel format: %s.\n", dc1394->pixel_format);
 110         ret = AVERROR(EINVAL);
 111         goto out;
 112     }
 113
 114     if ((ret = av_parse_video_size(&width, &height, dc1394->video_size)) < 0) {
 115         av_log(c, AV_LOG_ERROR, "Could not parse video size '%s'.\n", dc1394->video_size);
 116         goto out;
 117     }
 118     if ((ret = av_parse_video_rate(&framerate, dc1394->framerate)) < 0) {
 119         av_log(c, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", dc1394->framerate);
 120         goto out;
 121     }
 122     dc1394->frame_rate = av_rescale(1000, framerate.num, framerate.den);
 123
 124     for (fmt = dc1394_frame_formats; fmt->width; fmt++)
 125          if (fmt->pix_fmt == pix_fmt && fmt->width == width && fmt->height == height)
 126              break;
 127
 128     for (fps = dc1394_frame_rates; fps->frame_rate; fps++)
 129          if (fps->frame_rate == dc1394->frame_rate)
 130              break;
 131
 132     if (!fps->frame_rate || !fmt->width) {
 133         av_log(c, AV_LOG_ERROR, "Can't find matching camera format for %s, %dx%d@%d:1000fps\n", av_get_pix_fmt_name(pix_fmt),
 134                                                                                                 width, height, dc1394->frame_rate);
 135         ret = AVERROR(EINVAL);
 136         goto out;
 137     }
 138
 139     /* create a video stream */
 140     vst = avformat_new_stream(c, NULL);
 141     if (!vst) {
 142         ret = AVERROR(ENOMEM);
 143         goto out;
 144     }
 145     avpriv_set_pts_info(vst, 64, 1, 1000);
 146     vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
 147     vst->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
 148     vst->codecpar->width = fmt->width;
 149     vst->codecpar->height = fmt->height;
 150     vst->codecpar->format = fmt->pix_fmt;
 151     vst->avg_frame_rate = framerate;
 152
 153     dc1394->current_frame = 0;
 154     dc1394->stream_index = vst->index;
 155     dc1394->size = av_image_get_buffer_size(fmt->pix_fmt,
 156                                             fmt->width, fmt->height, 1);
 157
 158     vst->codecpar->bit_rate = av_rescale(dc1394->size * 8,
 159                                          fps->frame_rate, 1000);
 160     *select_fps = fps;
 161     *select_fmt = fmt;
 162 out:
 163     return ret;
 164 }
 165
 166 static int dc1394_read_header(AVFormatContext *c)
 167 {
 168     dc1394_data* dc1394 = c->priv_data;
 169     dc1394camera_list_t *list;
 170     int res, i;
 171     struct dc1394_frame_format *fmt = NULL;
 172     struct dc1394_frame_rate *fps = NULL;
 173
 174     if (dc1394_read_common(c, &fmt, &fps) != 0)
 175        return -1;
 176
 177     /* Now let us prep the hardware. */
 178     dc1394->d = dc1394_new();
 179     if (dc1394_camera_enumerate(dc1394->d, &list) != DC1394_SUCCESS || !list) {
 180         av_log(c, AV_LOG_ERROR, "Unable to look for an IIDC camera.\n");
 181         goto out;
 182     }
 183
 184     if (list->num == 0) {
 185         av_log(c, AV_LOG_ERROR, "No cameras found.\n");
 186         dc1394_camera_free_list(list);
 187         goto out;
 188     }
 189
 190     /* FIXME: To select a specific camera I need to search in list its guid */
 191     dc1394->camera = dc1394_camera_new (dc1394->d, list->ids[0].guid);
 192     if (list->num > 1) {
 193         av_log(c, AV_LOG_INFO, "Working with the first camera found\n");
 194     }
 195
 196     /* Freeing list of cameras */
 197     dc1394_camera_free_list (list);
 198
 199     /* Select MAX Speed possible from the cam */
 200     if (dc1394->camera->bmode_capable>0) {
 201        dc1394_video_set_operation_mode(dc1394->camera, DC1394_OPERATION_MODE_1394B);
 202        i = DC1394_ISO_SPEED_800;
 203     } else {
 204        i = DC1394_ISO_SPEED_400;
 205     }
 206
 207     for (res = DC1394_FAILURE; i >= DC1394_ISO_SPEED_MIN && res != DC1394_SUCCESS; i--) {
 208             res=dc1394_video_set_iso_speed(dc1394->camera, i);
 209     }
 210     if (res != DC1394_SUCCESS) {
 211         av_log(c, AV_LOG_ERROR, "Couldn't set ISO Speed\n");
 212         goto out_camera;
 213     }
 214
 215     if (dc1394_video_set_mode(dc1394->camera, fmt->frame_size_id) != DC1394_SUCCESS) {
 216         av_log(c, AV_LOG_ERROR, "Couldn't set video format\n");
 217         goto out_camera;
 218     }
 219
 220     if (dc1394_video_set_framerate(dc1394->camera,fps->frame_rate_id) != DC1394_SUCCESS) {
 221         av_log(c, AV_LOG_ERROR, "Couldn't set framerate %d \n",fps->frame_rate);
 222         goto out_camera;
 223     }
 224     if (dc1394_capture_setup(dc1394->camera, 10, DC1394_CAPTURE_FLAGS_DEFAULT)!=DC1394_SUCCESS) {
 225         av_log(c, AV_LOG_ERROR, "Cannot setup camera \n");
 226         goto out_camera;
 227     }
 228
 229     if (dc1394_video_set_transmission(dc1394->camera, DC1394_ON) !=DC1394_SUCCESS) {
 230         av_log(c, AV_LOG_ERROR, "Cannot start capture\n");
 231         goto out_camera;
 232     }
 233     return 0;
 234
 235 out_camera:
 236     dc1394_capture_stop(dc1394->camera);
 237     dc1394_video_set_transmission(dc1394->camera, DC1394_OFF);
 238     dc1394_camera_free (dc1394->camera);
 239 out:
 240     dc1394_free(dc1394->d);
 241     return -1;
 242 }
 243
 244 static int dc1394_read_packet(AVFormatContext *c, AVPacket *pkt)
 245 {
 246     struct dc1394_data *dc1394 = c->priv_data;
 247     int res;
 248
 249     /* discard stale frame */
 250     if (dc1394->current_frame++) {
 251         if (dc1394_capture_enqueue(dc1394->camera, dc1394->frame) != DC1394_SUCCESS)
 252             av_log(c, AV_LOG_ERROR, "failed to release %d frame\n", dc1394->current_frame);
 253     }
 254
 255     res = dc1394_capture_dequeue(dc1394->camera, DC1394_CAPTURE_POLICY_WAIT, &dc1394->frame);
 256     if (res == DC1394_SUCCESS) {
 257         pkt->data = (uint8_t *)dc1394->frame->image;
 258         pkt->size = dc1394->frame->image_bytes;
 259         pkt->pts = dc1394->current_frame * 1000000 / dc1394->frame_rate;
 260         pkt->flags |= AV_PKT_FLAG_KEY;
 261         pkt->stream_index = dc1394->stream_index;
 262     } else {
 263         av_log(c, AV_LOG_ERROR, "DMA capture failed\n");
 264         return AVERROR_INVALIDDATA;
 265     }
 266
 267     return pkt->size;
 268 }
 269
 270 static int dc1394_close(AVFormatContext * context)
 271 {
 272     struct dc1394_data *dc1394 = context->priv_data;
 273
 274     dc1394_video_set_transmission(dc1394->camera, DC1394_OFF);
 275     dc1394_capture_stop(dc1394->camera);
 276     dc1394_camera_free(dc1394->camera);
 277     dc1394_free(dc1394->d);
 278
 279     return 0;
 280 }
 281
 282 AVInputFormat ff_libdc1394_demuxer = {
 283     .name           = "libdc1394",
 284     .long_name      = NULL_IF_CONFIG_SMALL("dc1394 v.2 A/V grab"),
 285     .priv_data_size = sizeof(struct dc1394_data),
 286     .read_header    = dc1394_read_header,
 287     .read_packet    = dc1394_read_packet,
 288     .read_close     = dc1394_close,
 289     .flags          = AVFMT_NOFILE,
 290     .priv_class     = &libdc1394_class,
 291 };