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 "libavutil/log.h"
00026 #include "libavutil/opt.h"
00027 #include "avdevice.h"
00028 
00029 #include <stdlib.h>
00030 #include <string.h>
00031 #include "libavutil/parseutils.h"
00032 #include "libavutil/pixdesc.h"
00033 
00034 #include <dc1394/dc1394.h>
00035 
00036 #undef free
00037 
00038 typedef struct dc1394_data {
00039     AVClass *class;
00040     dc1394_t *d;
00041     dc1394camera_t *camera;
00042     dc1394video_frame_t *frame;
00043     int current_frame;
00044     int  frame_rate;        
00045     char *video_size;       
00046     char *pixel_format;     
00047     char *framerate;        
00049     AVPacket packet;
00050 } dc1394_data;
00051 
00052 /* The list of color codings that we support.
00053  * We assume big endian for the dc1394 16bit modes: libdc1394 never sets the
00054  * flag little_endian in dc1394video_frame_t. */
00055 struct dc1394_color_coding {
00056     int pix_fmt;
00057     int score;
00058     uint32_t coding;
00059 } dc1394_color_codings[] = {
00060     { PIX_FMT_GRAY16BE,  1000, DC1394_COLOR_CODING_MONO16 },
00061     { PIX_FMT_RGB48BE,   1100, DC1394_COLOR_CODING_RGB16  },
00062     { PIX_FMT_GRAY8,     1200, DC1394_COLOR_CODING_MONO8  },
00063     { PIX_FMT_RGB24,     1300, DC1394_COLOR_CODING_RGB8   },
00064     { PIX_FMT_UYYVYY411, 1400, DC1394_COLOR_CODING_YUV411 },
00065     { PIX_FMT_UYVY422,   1500, DC1394_COLOR_CODING_YUV422 },
00066     { PIX_FMT_NONE, 0, 0 } /* gotta be the last one */
00067 };
00068 
00069 struct dc1394_frame_rate {
00070     int frame_rate;
00071     int frame_rate_id;
00072 } dc1394_frame_rates[] = {
00073     {  1875, DC1394_FRAMERATE_1_875 },
00074     {  3750, DC1394_FRAMERATE_3_75  },
00075     {  7500, DC1394_FRAMERATE_7_5   },
00076     { 15000, DC1394_FRAMERATE_15    },
00077     { 30000, DC1394_FRAMERATE_30    },
00078     { 60000, DC1394_FRAMERATE_60    },
00079     {120000, DC1394_FRAMERATE_120   },
00080     {240000, DC1394_FRAMERATE_240    },
00081     { 0, 0 } /* gotta be the last one */
00082 };
00083 
00084 #define OFFSET(x) offsetof(dc1394_data, x)
00085 #define DEC AV_OPT_FLAG_DECODING_PARAM
00086 static const AVOption options[] = {
00087     { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), FF_OPT_TYPE_STRING, {.str = "qvga"}, 0, 0, DEC },
00088     { "pixel_format", "", OFFSET(pixel_format), FF_OPT_TYPE_STRING, {.str = "uyvy422"}, 0, 0, DEC },
00089     { "framerate", "", OFFSET(framerate), FF_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC },
00090     { NULL },
00091 };
00092 
00093 static const AVClass libdc1394_class = {
00094     .class_name = "libdc1394 indev",
00095     .item_name  = av_default_item_name,
00096     .option     = options,
00097     .version    = LIBAVUTIL_VERSION_INT,
00098 };
00099 
00100 static int dc1394_read_header(AVFormatContext *c, AVFormatParameters * ap)
00101 {
00102     dc1394_data* dc1394 = c->priv_data;
00103     AVStream *vst;
00104     const struct dc1394_color_coding *cc;
00105     const struct dc1394_frame_rate *fr;
00106     dc1394camera_list_t *list;
00107     dc1394video_modes_t video_modes;
00108     dc1394video_mode_t video_mode;
00109     dc1394framerates_t frame_rates;
00110     dc1394framerate_t frame_rate;
00111     uint32_t dc1394_width, dc1394_height, dc1394_color_coding;
00112     int rate, best_rate;
00113     int score, max_score;
00114     int final_width, final_height, final_pix_fmt, final_frame_rate;
00115     int res, i, j;
00116     int ret=-1;
00117 
00118     /* Now let us prep the hardware. */
00119     dc1394->d = dc1394_new();
00120     dc1394_camera_enumerate (dc1394->d, &list);
00121     if ( !list || list->num == 0) {
00122         av_log(c, AV_LOG_ERROR, "Unable to look for an IIDC camera\n\n");
00123         goto out;
00124     }
00125 
00126     /* FIXME: To select a specific camera I need to search in list its guid */
00127     dc1394->camera = dc1394_camera_new (dc1394->d, list->ids[0].guid);
00128     if (list->num > 1) {
00129         av_log(c, AV_LOG_INFO, "Working with the first camera found\n");
00130     }
00131 
00132     /* Freeing list of cameras */
00133     dc1394_camera_free_list (list);
00134 
00135     /* Get the list of video modes supported by the camera. */
00136     res = dc1394_video_get_supported_modes (dc1394->camera, &video_modes);
00137     if (res != DC1394_SUCCESS) {
00138         av_log(c, AV_LOG_ERROR, "Could not get video formats.\n");
00139         goto out_camera;
00140     }
00141 
00142     if (dc1394->pixel_format) {
00143         if ((ap->pix_fmt = av_get_pix_fmt(dc1394->pixel_format)) == PIX_FMT_NONE) {
00144             av_log(c, AV_LOG_ERROR, "No such pixel format: %s.\n", dc1394->pixel_format);
00145             ret = AVERROR(EINVAL);
00146             goto out;
00147         }
00148     }
00149 
00150     if (dc1394->video_size) {
00151         if ((ret = av_parse_video_size(&ap->width, &ap->height, dc1394->video_size)) < 0) {
00152             av_log(c, AV_LOG_ERROR, "Couldn't parse video size.\n");
00153             goto out;
00154         }
00155     }
00156     
00157     /* Choose the best mode. */
00158     rate = (ap->time_base.num ? av_rescale(1000, ap->time_base.den, ap->time_base.num) : -1);
00159     max_score = -1;
00160     for (i = 0; i < video_modes.num; i++) {
00161         if (video_modes.modes[i] == DC1394_VIDEO_MODE_EXIF
00162                 || (video_modes.modes[i] >= DC1394_VIDEO_MODE_FORMAT7_MIN
00163                     && video_modes.modes[i] <= DC1394_VIDEO_MODE_FORMAT7_MAX)) {
00164             /* These modes are currently not supported as they would require
00165              * much more work. For the remaining modes, the functions
00166              * dc1394_get_image_size_from_video_mode and
00167              * dc1394_get_color_coding_from_video_mode do not need to query the
00168              * camera, and thus cannot fail. */
00169             continue;
00170         }
00171         dc1394_get_color_coding_from_video_mode (NULL, video_modes.modes[i],
00172                 &dc1394_color_coding);
00173         for (cc = dc1394_color_codings; cc->pix_fmt != PIX_FMT_NONE; cc++)
00174             if (cc->coding == dc1394_color_coding)
00175                 break;
00176         if (cc->pix_fmt == PIX_FMT_NONE) {
00177             /* We currently cannot handle this color coding. */
00178             continue;
00179         }
00180         /* Here we know that the mode is supported. Get its frame size and the list
00181          * of frame rates supported by the camera for this mode. This list is sorted
00182          * in ascending order according to libdc1394 example programs. */
00183         dc1394_get_image_size_from_video_mode (NULL, video_modes.modes[i],
00184                 &dc1394_width, &dc1394_height);
00185         res = dc1394_video_get_supported_framerates (dc1394->camera, video_modes.modes[i],
00186                 &frame_rates);
00187         if (res != DC1394_SUCCESS || frame_rates.num == 0) {
00188             av_log(c, AV_LOG_ERROR, "Cannot get frame rates for video mode.\n");
00189             goto out_camera;
00190         }
00191         /* Choose the best frame rate. */
00192         best_rate = -1;
00193         for (j = 0; j < frame_rates.num; j++) {
00194             for (fr = dc1394_frame_rates; fr->frame_rate; fr++) {
00195                 if (fr->frame_rate_id == frame_rates.framerates[j]) {
00196                     break;
00197                 }
00198             }
00199             if (!fr->frame_rate) {
00200                 /* This frame rate is not supported. */
00201                 continue;
00202             }
00203             best_rate = fr->frame_rate;
00204             frame_rate = fr->frame_rate_id;
00205             if (ap->time_base.num && rate == fr->frame_rate) {
00206                 /* This is the requested frame rate. */
00207                 break;
00208             }
00209         }
00210         if (best_rate == -1) {
00211             /* No supported rate found. */
00212             continue;
00213         }
00214         /* Here we know that both the mode and the rate are supported. Compute score. */
00215         if (ap->width && ap->height
00216                 && (dc1394_width == ap->width && dc1394_height == ap->height)) {
00217             score = 110000;
00218         } else {
00219             score = dc1394_width * 10;  // 1600 - 16000
00220         }
00221         if (ap->pix_fmt == cc->pix_fmt) {
00222             score += 90000;
00223         } else {
00224             score += cc->score;         // 1000 - 1500
00225         }
00226         if (ap->time_base.num && rate == best_rate) {
00227             score += 70000;
00228         } else {
00229             score += best_rate / 1000;  // 1 - 240
00230         }
00231         if (score > max_score) {
00232             video_mode = video_modes.modes[i];
00233             final_width = dc1394_width;
00234             final_height = dc1394_height;
00235             final_pix_fmt = cc->pix_fmt;
00236             final_frame_rate = best_rate;
00237             max_score = score;
00238         }
00239     }
00240     if (max_score == -1) {
00241         av_log(c, AV_LOG_ERROR, "No suitable video mode / frame rate available.\n");
00242         goto out_camera;
00243     }
00244     if (ap->width && ap->height && !(ap->width == final_width && ap->height == final_height)) {
00245         av_log(c, AV_LOG_WARNING, "Requested frame size is not available, using fallback.\n");
00246     }
00247     if (ap->pix_fmt != PIX_FMT_NONE && ap->pix_fmt != final_pix_fmt) {
00248         av_log(c, AV_LOG_WARNING, "Requested pixel format is not supported, using fallback.\n");
00249     }
00250     if (ap->time_base.num && rate != final_frame_rate) {
00251         av_log(c, AV_LOG_WARNING, "Requested frame rate is not available, using fallback.\n");
00252     }
00253 
00254     /* create a video stream */
00255     vst = av_new_stream(c, 0);
00256     if (!vst)
00257         goto out_camera;
00258     av_set_pts_info(vst, 64, 1, 1000);
00259     vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
00260     vst->codec->codec_id = CODEC_ID_RAWVIDEO;
00261     vst->codec->time_base.den = final_frame_rate;
00262     vst->codec->time_base.num = 1000;
00263     vst->codec->width = final_width;
00264     vst->codec->height = final_height;
00265     vst->codec->pix_fmt = final_pix_fmt;
00266 
00267     /* packet init */
00268     av_init_packet(&dc1394->packet);
00269     dc1394->packet.size = avpicture_get_size(final_pix_fmt, final_width, final_height);
00270     dc1394->packet.stream_index = vst->index;
00271     dc1394->packet.flags |= AV_PKT_FLAG_KEY;
00272 
00273     dc1394->current_frame = 0;
00274     dc1394->frame_rate = final_frame_rate;
00275 
00276     vst->codec->bit_rate = av_rescale(dc1394->packet.size * 8, final_frame_rate, 1000);
00277 
00278     /* Select MAX Speed possible from the cam */
00279     if (dc1394->camera->bmode_capable>0) {
00280        dc1394_video_set_operation_mode(dc1394->camera, DC1394_OPERATION_MODE_1394B);
00281        i = DC1394_ISO_SPEED_800;
00282     } else {
00283        i = DC1394_ISO_SPEED_400;
00284     }
00285 
00286     for (res = DC1394_FAILURE; i >= DC1394_ISO_SPEED_MIN && res != DC1394_SUCCESS; i--) {
00287             res=dc1394_video_set_iso_speed(dc1394->camera, i);
00288     }
00289     if (res != DC1394_SUCCESS) {
00290         av_log(c, AV_LOG_ERROR, "Couldn't set ISO Speed\n");
00291         goto out_camera;
00292     }
00293 
00294     if (dc1394_video_set_mode(dc1394->camera, video_mode) != DC1394_SUCCESS) {
00295         av_log(c, AV_LOG_ERROR, "Couldn't set video format\n");
00296         goto out_camera;
00297     }
00298 
00299     if (dc1394_video_set_framerate(dc1394->camera, frame_rate) != DC1394_SUCCESS) {
00300         av_log(c, AV_LOG_ERROR, "Could not set framerate %d.\n", final_frame_rate);
00301         goto out_camera;
00302     }
00303     if (dc1394_capture_setup(dc1394->camera, 10, DC1394_CAPTURE_FLAGS_DEFAULT)!=DC1394_SUCCESS) {
00304         av_log(c, AV_LOG_ERROR, "Cannot setup camera \n");
00305         goto out_camera;
00306     }
00307 
00308     if (dc1394_video_set_transmission(dc1394->camera, DC1394_ON) !=DC1394_SUCCESS) {
00309         av_log(c, AV_LOG_ERROR, "Cannot start capture\n");
00310         goto out_camera;
00311     }
00312     return 0;
00313 
00314 out_camera:
00315     dc1394_capture_stop(dc1394->camera);
00316     dc1394_video_set_transmission(dc1394->camera, DC1394_OFF);
00317     dc1394_camera_free (dc1394->camera);
00318 out:
00319     dc1394_free(dc1394->d);
00320     return ret;
00321 }
00322 
00323 static int dc1394_read_packet(AVFormatContext *c, AVPacket *pkt)
00324 {
00325     struct dc1394_data *dc1394 = c->priv_data;
00326     int res;
00327 
00328     /* discard stale frame */
00329     if (dc1394->current_frame++) {
00330         if (dc1394_capture_enqueue(dc1394->camera, dc1394->frame) != DC1394_SUCCESS)
00331             av_log(c, AV_LOG_ERROR, "failed to release %d frame\n", dc1394->current_frame);
00332     }
00333 
00334     res = dc1394_capture_dequeue(dc1394->camera, DC1394_CAPTURE_POLICY_WAIT, &dc1394->frame);
00335     if (res == DC1394_SUCCESS) {
00336         dc1394->packet.data = (uint8_t *)(dc1394->frame->image);
00337         dc1394->packet.pts = (dc1394->current_frame  * 1000000) / (dc1394->frame_rate);
00338         res = dc1394->frame->image_bytes;
00339     } else {
00340         av_log(c, AV_LOG_ERROR, "DMA capture failed\n");
00341         dc1394->packet.data = NULL;
00342         res = -1;
00343     }
00344 
00345     *pkt = dc1394->packet;
00346     return res;
00347 }
00348 
00349 static int dc1394_close(AVFormatContext * context)
00350 {
00351     struct dc1394_data *dc1394 = context->priv_data;
00352 
00353     dc1394_video_set_transmission(dc1394->camera, DC1394_OFF);
00354     dc1394_capture_stop(dc1394->camera);
00355     dc1394_camera_free(dc1394->camera);
00356     dc1394_free(dc1394->d);
00357 
00358     return 0;
00359 }
00360 
00361 AVInputFormat ff_libdc1394_demuxer = {
00362     .name           = "libdc1394",
00363     .long_name      = NULL_IF_CONFIG_SMALL("dc1394 A/V grab"),
00364     .priv_data_size = sizeof(struct dc1394_data),
00365     .read_header    = dc1394_read_header,
00366     .read_packet    = dc1394_read_packet,
00367     .read_close     = dc1394_close,
00368     .flags          = AVFMT_NOFILE,
00369     .priv_class     = &libdc1394_class,
00370 };