FFmpeg: libavdevice/libdc1394.c Source File

00001 /*
00002  * IIDC1394 grab interface (uses libdc1394 and libraw1394)
00003  * Copyright (c) 2004 Roman Shaposhnik
00004  * Copyright (c) 2008 Alessandro Sappia
00005  * Copyright (c) 2011 Martin Lambers
00006  *
00007  * This file is part of FFmpeg.
00008  *
00009  * FFmpeg is free software; you can redistribute it and/or
00010  * modify it under the terms of the GNU Lesser General Public
00011  * License as published by the Free Software Foundation; either
00012  * version 2.1 of the License, or (at your option) any later version.
00013  *
00014  * FFmpeg is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017  * Lesser General Public License for more details.
00018  *
00019  * You should have received a copy of the GNU Lesser General Public
00020  * License along with FFmpeg; if not, write to the Free Software
00021  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00022  */
00023 
00024 #include "config.h"
00025 #include "libavformat/internal.h"
00026 #include "libavutil/log.h"
00027 #include "libavutil/mathematics.h"
00028 #include "libavutil/opt.h"
00029 #include "avdevice.h"
00030 
00031 #include <stdlib.h>
00032 #include <string.h>
00033 #include "libavutil/parseutils.h"
00034 #include "libavutil/pixdesc.h"
00035 
00036 #include <dc1394/dc1394.h>
00037 
00038 #undef free
00039 
00040 typedef struct dc1394_data {
00041     AVClass *class;
00042     dc1394_t *d;
00043     dc1394camera_t *camera;
00044     dc1394video_frame_t *frame;
00045     int current_frame;
00046     int  frame_rate;        
00047     char *video_size;       
00048     char *pixel_format;     
00049     char *framerate;        
00051     AVPacket packet;
00052 } dc1394_data;
00053 
00054 /* The list of color codings that we support.
00055  * We assume big endian for the dc1394 16bit modes: libdc1394 never sets the
00056  * flag little_endian in dc1394video_frame_t. */
00057 struct dc1394_color_coding {
00058     int pix_fmt;
00059     int score;
00060     uint32_t coding;
00061 } dc1394_color_codings[] = {
00062     { PIX_FMT_GRAY16BE,  1000, DC1394_COLOR_CODING_MONO16 },
00063     { PIX_FMT_RGB48BE,   1100, DC1394_COLOR_CODING_RGB16  },
00064     { PIX_FMT_GRAY8,     1200, DC1394_COLOR_CODING_MONO8  },
00065     { PIX_FMT_RGB24,     1300, DC1394_COLOR_CODING_RGB8   },
00066     { PIX_FMT_UYYVYY411, 1400, DC1394_COLOR_CODING_YUV411 },
00067     { PIX_FMT_UYVY422,   1500, DC1394_COLOR_CODING_YUV422 },
00068     { PIX_FMT_NONE, 0, 0 } /* gotta be the last one */
00069 };
00070 
00071 struct dc1394_frame_rate {
00072     int frame_rate;
00073     int frame_rate_id;
00074 } dc1394_frame_rates[] = {
00075     {  1875, DC1394_FRAMERATE_1_875 },
00076     {  3750, DC1394_FRAMERATE_3_75  },
00077     {  7500, DC1394_FRAMERATE_7_5   },
00078     { 15000, DC1394_FRAMERATE_15    },
00079     { 30000, DC1394_FRAMERATE_30    },
00080     { 60000, DC1394_FRAMERATE_60    },
00081     {120000, DC1394_FRAMERATE_120   },
00082     {240000, DC1394_FRAMERATE_240    },
00083     { 0, 0 } /* gotta be the last one */
00084 };
00085 
00086 #define OFFSET(x) offsetof(dc1394_data, x)
00087 #define DEC AV_OPT_FLAG_DECODING_PARAM
00088 static const AVOption options[] = {
00089     { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = "qvga"}, 0, 0, DEC },
00090     { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "uyvy422"}, 0, 0, DEC },
00091     { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC },
00092     { NULL },
00093 };
00094 
00095 static const AVClass libdc1394_class = {
00096     .class_name = "libdc1394 indev",
00097     .item_name  = av_default_item_name,
00098     .option     = options,
00099     .version    = LIBAVUTIL_VERSION_INT,
00100 };
00101 
00102 static int dc1394_read_header(AVFormatContext *c, AVFormatParameters * ap)
00103 {
00104     dc1394_data* dc1394 = c->priv_data;
00105     AVStream *vst;
00106     const struct dc1394_color_coding *cc;
00107     const struct dc1394_frame_rate *fr;
00108     dc1394camera_list_t *list;
00109     dc1394video_modes_t video_modes;
00110     dc1394video_mode_t video_mode;
00111     dc1394framerates_t frame_rates;
00112     dc1394framerate_t frame_rate;
00113     uint32_t dc1394_width, dc1394_height, dc1394_color_coding;
00114     int rate, best_rate;
00115     int score, max_score;
00116     int final_width, final_height, final_pix_fmt, final_frame_rate;
00117     int res, i, j;
00118     int ret=-1;
00119 
00120     /* Now let us prep the hardware. */
00121     dc1394->d = dc1394_new();
00122     dc1394_camera_enumerate (dc1394->d, &list);
00123     if ( !list || list->num == 0) {
00124         av_log(c, AV_LOG_ERROR, "Unable to look for an IIDC camera\n\n");
00125         goto out;
00126     }
00127 
00128     /* FIXME: To select a specific camera I need to search in list its guid */
00129     dc1394->camera = dc1394_camera_new (dc1394->d, list->ids[0].guid);
00130     if (list->num > 1) {
00131         av_log(c, AV_LOG_INFO, "Working with the first camera found\n");
00132     }
00133 
00134     /* Freeing list of cameras */
00135     dc1394_camera_free_list (list);
00136 
00137     /* Get the list of video modes supported by the camera. */
00138     res = dc1394_video_get_supported_modes (dc1394->camera, &video_modes);
00139     if (res != DC1394_SUCCESS) {
00140         av_log(c, AV_LOG_ERROR, "Could not get video formats.\n");
00141         goto out_camera;
00142     }
00143 
00144     if (dc1394->pixel_format) {
00145         if ((ap->pix_fmt = av_get_pix_fmt(dc1394->pixel_format)) == PIX_FMT_NONE) {
00146             av_log(c, AV_LOG_ERROR, "No such pixel format: %s.\n", dc1394->pixel_format);
00147             ret = AVERROR(EINVAL);
00148             goto out;
00149         }
00150     }
00151 
00152     if (dc1394->video_size) {
00153         if ((ret = av_parse_video_size(&ap->width, &ap->height, dc1394->video_size)) < 0) {
00154             av_log(c, AV_LOG_ERROR, "Couldn't parse video size.\n");
00155             goto out;
00156         }
00157     }
00158 
00159     /* Choose the best mode. */
00160     rate = (ap->time_base.num ? av_rescale(1000, ap->time_base.den, ap->time_base.num) : -1);
00161     max_score = -1;
00162     for (i = 0; i < video_modes.num; i++) {
00163         if (video_modes.modes[i] == DC1394_VIDEO_MODE_EXIF
00164                 || (video_modes.modes[i] >= DC1394_VIDEO_MODE_FORMAT7_MIN
00165                     && video_modes.modes[i] <= DC1394_VIDEO_MODE_FORMAT7_MAX)) {
00166             /* These modes are currently not supported as they would require
00167              * much more work. For the remaining modes, the functions
00168              * dc1394_get_image_size_from_video_mode and
00169              * dc1394_get_color_coding_from_video_mode do not need to query the
00170              * camera, and thus cannot fail. */
00171             continue;
00172         }
00173         dc1394_get_color_coding_from_video_mode (NULL, video_modes.modes[i],
00174                 &dc1394_color_coding);
00175         for (cc = dc1394_color_codings; cc->pix_fmt != PIX_FMT_NONE; cc++)
00176             if (cc->coding == dc1394_color_coding)
00177                 break;
00178         if (cc->pix_fmt == PIX_FMT_NONE) {
00179             /* We currently cannot handle this color coding. */
00180             continue;
00181         }
00182         /* Here we know that the mode is supported. Get its frame size and the list
00183          * of frame rates supported by the camera for this mode. This list is sorted
00184          * in ascending order according to libdc1394 example programs. */
00185         dc1394_get_image_size_from_video_mode (NULL, video_modes.modes[i],
00186                 &dc1394_width, &dc1394_height);
00187         res = dc1394_video_get_supported_framerates (dc1394->camera, video_modes.modes[i],
00188                 &frame_rates);
00189         if (res != DC1394_SUCCESS || frame_rates.num == 0) {
00190             av_log(c, AV_LOG_ERROR, "Cannot get frame rates for video mode.\n");
00191             goto out_camera;
00192         }
00193         /* Choose the best frame rate. */
00194         best_rate = -1;
00195         for (j = 0; j < frame_rates.num; j++) {
00196             for (fr = dc1394_frame_rates; fr->frame_rate; fr++) {
00197                 if (fr->frame_rate_id == frame_rates.framerates[j]) {
00198                     break;
00199                 }
00200             }
00201             if (!fr->frame_rate) {
00202                 /* This frame rate is not supported. */
00203                 continue;
00204             }
00205             best_rate = fr->frame_rate;
00206             frame_rate = fr->frame_rate_id;
00207             if (ap->time_base.num && rate == fr->frame_rate) {
00208                 /* This is the requested frame rate. */
00209                 break;
00210             }
00211         }
00212         if (best_rate == -1) {
00213             /* No supported rate found. */
00214             continue;
00215         }
00216         /* Here we know that both the mode and the rate are supported. Compute score. */
00217         if (ap->width && ap->height
00218                 && (dc1394_width == ap->width && dc1394_height == ap->height)) {
00219             score = 110000;
00220         } else {
00221             score = dc1394_width * 10;  // 1600 - 16000
00222         }
00223         if (ap->pix_fmt == cc->pix_fmt) {
00224             score += 90000;
00225         } else {
00226             score += cc->score;         // 1000 - 1500
00227         }
00228         if (ap->time_base.num && rate == best_rate) {
00229             score += 70000;
00230         } else {
00231             score += best_rate / 1000;  // 1 - 240
00232         }
00233         if (score > max_score) {
00234             video_mode = video_modes.modes[i];
00235             final_width = dc1394_width;
00236             final_height = dc1394_height;
00237             final_pix_fmt = cc->pix_fmt;
00238             final_frame_rate = best_rate;
00239             max_score = score;
00240         }
00241     }
00242     if (max_score == -1) {
00243         av_log(c, AV_LOG_ERROR, "No suitable video mode / frame rate available.\n");
00244         goto out_camera;
00245     }
00246     if (ap->width && ap->height && !(ap->width == final_width && ap->height == final_height)) {
00247         av_log(c, AV_LOG_WARNING, "Requested frame size is not available, using fallback.\n");
00248     }
00249     if (ap->pix_fmt != PIX_FMT_NONE && ap->pix_fmt != final_pix_fmt) {
00250         av_log(c, AV_LOG_WARNING, "Requested pixel format is not supported, using fallback.\n");
00251     }
00252     if (ap->time_base.num && rate != final_frame_rate) {
00253         av_log(c, AV_LOG_WARNING, "Requested frame rate is not available, using fallback.\n");
00254     }
00255 
00256     /* create a video stream */
00257     vst = avformat_new_stream(c, NULL);
00258     if (!vst)
00259         goto out_camera;
00260     avpriv_set_pts_info(vst, 64, 1, 1000);
00261     vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
00262     vst->codec->codec_id = CODEC_ID_RAWVIDEO;
00263     vst->codec->time_base.den = final_frame_rate;
00264     vst->codec->time_base.num = 1000;
00265     vst->codec->width = final_width;
00266     vst->codec->height = final_height;
00267     vst->codec->pix_fmt = final_pix_fmt;
00268 
00269     /* packet init */
00270     av_init_packet(&dc1394->packet);
00271     dc1394->packet.size = avpicture_get_size(final_pix_fmt, final_width, final_height);
00272     dc1394->packet.stream_index = vst->index;
00273     dc1394->packet.flags |= AV_PKT_FLAG_KEY;
00274 
00275     dc1394->current_frame = 0;
00276     dc1394->frame_rate = final_frame_rate;
00277 
00278     vst->codec->bit_rate = av_rescale(dc1394->packet.size * 8, final_frame_rate, 1000);
00279 
00280     /* Select MAX Speed possible from the cam */
00281     if (dc1394->camera->bmode_capable>0) {
00282        dc1394_video_set_operation_mode(dc1394->camera, DC1394_OPERATION_MODE_1394B);
00283        i = DC1394_ISO_SPEED_800;
00284     } else {
00285        i = DC1394_ISO_SPEED_400;
00286     }
00287 
00288     for (res = DC1394_FAILURE; i >= DC1394_ISO_SPEED_MIN && res != DC1394_SUCCESS; i--) {
00289             res=dc1394_video_set_iso_speed(dc1394->camera, i);
00290     }
00291     if (res != DC1394_SUCCESS) {
00292         av_log(c, AV_LOG_ERROR, "Couldn't set ISO Speed\n");
00293         goto out_camera;
00294     }
00295 
00296     if (dc1394_video_set_mode(dc1394->camera, video_mode) != DC1394_SUCCESS) {
00297         av_log(c, AV_LOG_ERROR, "Couldn't set video format\n");
00298         goto out_camera;
00299     }
00300 
00301     if (dc1394_video_set_framerate(dc1394->camera, frame_rate) != DC1394_SUCCESS) {
00302         av_log(c, AV_LOG_ERROR, "Could not set framerate %d.\n", final_frame_rate);
00303         goto out_camera;
00304     }
00305     if (dc1394_capture_setup(dc1394->camera, 10, DC1394_CAPTURE_FLAGS_DEFAULT)!=DC1394_SUCCESS) {
00306         av_log(c, AV_LOG_ERROR, "Cannot setup camera \n");
00307         goto out_camera;
00308     }
00309 
00310     if (dc1394_video_set_transmission(dc1394->camera, DC1394_ON) !=DC1394_SUCCESS) {
00311         av_log(c, AV_LOG_ERROR, "Cannot start capture\n");
00312         goto out_camera;
00313     }
00314     return 0;
00315 
00316 out_camera:
00317     dc1394_capture_stop(dc1394->camera);
00318     dc1394_video_set_transmission(dc1394->camera, DC1394_OFF);
00319     dc1394_camera_free (dc1394->camera);
00320 out:
00321     dc1394_free(dc1394->d);
00322     return ret;
00323 }
00324 
00325 static int dc1394_read_packet(AVFormatContext *c, AVPacket *pkt)
00326 {
00327     struct dc1394_data *dc1394 = c->priv_data;
00328     int res;
00329 
00330     /* discard stale frame */
00331     if (dc1394->current_frame++) {
00332         if (dc1394_capture_enqueue(dc1394->camera, dc1394->frame) != DC1394_SUCCESS)
00333             av_log(c, AV_LOG_ERROR, "failed to release %d frame\n", dc1394->current_frame);
00334     }
00335 
00336     res = dc1394_capture_dequeue(dc1394->camera, DC1394_CAPTURE_POLICY_WAIT, &dc1394->frame);
00337     if (res == DC1394_SUCCESS) {
00338         dc1394->packet.data = (uint8_t *) dc1394->frame->image;
00339         dc1394->packet.pts  = dc1394->current_frame * 1000000 / dc1394->frame_rate;
00340         res = dc1394->frame->image_bytes;
00341     } else {
00342         av_log(c, AV_LOG_ERROR, "DMA capture failed\n");
00343         dc1394->packet.data = NULL;
00344         res = -1;
00345     }
00346 
00347     *pkt = dc1394->packet;
00348     return res;
00349 }
00350 
00351 static int dc1394_close(AVFormatContext * context)
00352 {
00353     struct dc1394_data *dc1394 = context->priv_data;
00354 
00355     dc1394_video_set_transmission(dc1394->camera, DC1394_OFF);
00356     dc1394_capture_stop(dc1394->camera);
00357     dc1394_camera_free(dc1394->camera);
00358     dc1394_free(dc1394->d);
00359 
00360     return 0;
00361 }
00362 
00363 AVInputFormat ff_libdc1394_demuxer = {
00364     .name           = "libdc1394",
00365     .long_name      = NULL_IF_CONFIG_SMALL("dc1394 A/V grab"),
00366     .priv_data_size = sizeof(struct dc1394_data),
00367     .read_header    = dc1394_read_header,
00368     .read_packet    = dc1394_read_packet,
00369     .read_close     = dc1394_close,
00370     .flags          = AVFMT_NOFILE,
00371     .priv_class     = &libdc1394_class,
00372 };