Wed Aug 18 22:33:51 2010

Asterisk developer's documentation


console_video.c

Go to the documentation of this file.
00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright 2007-2008, Marta Carbone, Sergio Fadda, Luigi Rizzo
00005  *
00006  * See http://www.asterisk.org for more information about
00007  * the Asterisk project. Please do not directly contact
00008  * any of the maintainers of this project for assistance;
00009  * the project provides a web site, mailing lists and IRC
00010  * channels for your use.
00011  *
00012  * This program is free software, distributed under the terms of
00013  * the GNU General Public License Version 2. See the LICENSE file
00014  * at the top of the source tree.
00015  */
00016 
00017 /*
00018  * Experimental support for video sessions. We use SDL for rendering, ffmpeg
00019  * as the codec library for encoding and decoding, and Video4Linux and X11
00020  * to generate the local video stream.
00021  *
00022  * If one of these pieces is not available, either at compile time or at
00023  * runtime, we do our best to run without it. Of course, no codec library
00024  * means we can only deal with raw data, no SDL means we cannot do rendering,
00025  * no V4L or X11 means we cannot generate data (but in principle we could
00026  * stream from or record to a file).
00027  *
00028  * We need a recent (2007.07.12 or newer) version of ffmpeg to avoid warnings.
00029  * Older versions might give 'deprecated' messages during compilation,
00030  * thus not compiling in AST_DEVMODE, or don't have swscale, in which case
00031  * you can try to compile #defining OLD_FFMPEG here.
00032  *
00033  * $Revision: 147811 $
00034  */
00035 
00036 //#define DROP_PACKETS 5       /* if set, drop this % of video packets */
00037 //#define OLD_FFMPEG 1  /* set for old ffmpeg with no swscale */
00038 
00039 #include "asterisk.h"
00040 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 147811 $")
00041 #include <sys/ioctl.h>
00042 #include "asterisk/cli.h"
00043 #include "asterisk/file.h"
00044 #include "asterisk/channel.h"
00045 
00046 #include "console_video.h"
00047 
00048 /*
00049 The code is structured as follows.
00050 
00051 When a new console channel is created, we call console_video_start()
00052 to initialize SDL, the source, and the encoder/ decoder for the
00053 formats in use (XXX the latter two should be done later, once the
00054 codec negotiation is complete).  Also, a thread is created to handle
00055 the video source and generate frames.
00056 
00057 While communication is on, the local source is generated by the
00058 video thread, which wakes up periodically, generates frames and
00059 enqueues them in chan->readq.  Incoming rtp frames are passed to
00060 console_write_video(), decoded and passed to SDL for display.
00061 
00062 For as unfortunate and confusing as it can be, we need to deal with a
00063 number of different video representations (size, codec/pixel format,
00064 codec parameters), as follows:
00065 
00066  loc_src is the data coming from the camera/X11/etc.
00067    The format is typically constrained by the video source.
00068 
00069  enc_in     is the input required by the encoder.
00070    Typically constrained in size by the encoder type.
00071 
00072  enc_out is the bitstream transmitted over RTP.
00073    Typically negotiated while the call is established.
00074 
00075  loc_dpy is the format used to display the local video source.
00076    Depending on user preferences this can have the same size as
00077    loc_src_fmt, or enc_in_fmt, or thumbnail size (e.g. PiP output)
00078 
00079  dec_in     is the incoming RTP bitstream. Negotiated
00080    during call establishment, it is not necessarily the same as
00081    enc_in_fmt
00082 
00083  dec_out the output of the decoder.
00084    The format is whatever the other side sends, and the
00085    buffer is allocated by avcodec_decode_... so we only
00086    copy the data here.
00087 
00088  rem_dpy the format used to display the remote stream
00089 
00090  src_dpy is the format used to display the local video source streams
00091    The number of these fbuf_t is determined at run time, with dynamic allocation
00092 
00093 We store the format info together with the buffer storing the data.
00094 As a future optimization, a format/buffer may reference another one
00095 if the formats are equivalent. This will save some unnecessary format
00096 conversion.
00097 
00098 
00099 In order to handle video you need to add to sip.conf (and presumably
00100 iax.conf too) the following:
00101 
00102    [general](+)
00103       videosupport=yes
00104       allow=h263  ; this or other video formats
00105       allow=h263p ; this or other video formats
00106 
00107  */
00108 
00109 /*
00110  * Codecs are absolutely necessary or we cannot do anything.
00111  * SDL is optional (used for rendering only), so that we can still
00112  * stream video withouth displaying it.
00113  */
00114 #if !defined(HAVE_VIDEO_CONSOLE) || !defined(HAVE_FFMPEG)
00115 /* stubs if required pieces are missing */
00116 int console_write_video(struct ast_channel *chan, struct ast_frame *f)
00117 {
00118    return 0;   /* writing video not supported */
00119 }
00120 
00121 int console_video_cli(struct video_desc *env, const char *var, int fd)
00122 {
00123    return 1;   /* nothing matched */
00124 }
00125 
00126 int console_video_config(struct video_desc **penv, const char *var, const char *val)
00127 {
00128    return 1;   /* no configuration */
00129 }
00130 
00131 void console_video_start(struct video_desc *env, struct ast_channel *owner)
00132 {
00133    ast_log(LOG_NOTICE, "voice only, console video support not present\n");
00134 }
00135 
00136 void console_video_uninit(struct video_desc *env)
00137 {
00138 }
00139 
00140 int get_gui_startup(struct video_desc* env)
00141 {
00142    return 0; /* no gui here */
00143 }
00144 
00145 int console_video_formats = 0;
00146 
00147 #else /* defined(HAVE_FFMPEG) && defined(HAVE_SDL) */
00148 
00149 /*! The list of video formats we support. */
00150 int console_video_formats = 
00151    AST_FORMAT_H263_PLUS | AST_FORMAT_H263 |
00152    AST_FORMAT_MP4_VIDEO | AST_FORMAT_H264 | AST_FORMAT_H261 ;
00153 
00154 
00155 
00156 /* function to scale and encode buffers */
00157 static void my_scale(struct fbuf_t *in, AVPicture *p_in,
00158    struct fbuf_t *out, AVPicture *p_out);
00159 
00160 /*
00161  * this structure will be an entry in the table containing
00162  * every device specified in the file oss.conf, it contains various infomation
00163  * about the device
00164  */
00165 struct video_device {
00166    char        *name;      /* name of the device         */
00167    /* allocated dynamically (see fill_table function) */
00168    struct grab_desc  *grabber;   /* the grabber for the device type  */
00169    void        *grabber_data; /* device's private data structure  */
00170    struct fbuf_t     *dev_buf;   /* buffer for incoming data      */
00171    struct timeval    last_frame; /* when we read the last frame ? */
00172    int         status_index;  /* what is the status of the device (source) */
00173    /* status index is set using the IS_ON, IS_PRIMARY and IS_SECONDARY costants */
00174    /* status_index is the index of the status message in the src_msgs array in console_gui.c */
00175 };
00176 
00177 struct video_codec_desc;   /* forward declaration */
00178 /*
00179  * Descriptor of the local source, made of the following pieces:
00180  *  + configuration info (geometry, device name, fps...). These are read
00181  *    from the config file and copied here before calling video_out_init();
00182  *  + the frame buffer (buf) and source pixel format, allocated at init time;
00183  *  + the encoding and RTP info, including timestamps to generate
00184  *    frames at the correct rate;
00185  *  + source-specific info, i.e. fd for /dev/video, dpy-image for x11, etc,
00186  *    filled in by grabber_open, part of source_specific information are in 
00187  *    the device table (devices member), others are shared;
00188  * NOTE: loc_src.data == NULL means the rest of the struct is invalid, and
00189  * the video source is not available.
00190  */
00191 struct video_out_desc {
00192    /* video device support.
00193     * videodevice and geometry are read from the config file.
00194     * At the right time we try to open it and allocate a buffer.
00195     * If we are successful, webcam_bufsize > 0 and we can read.
00196     */
00197    /* all the following is config file info copied from the parent */
00198    int      fps;
00199    int      bitrate;
00200    int      qmin;
00201 
00202    int sendvideo;
00203 
00204    struct fbuf_t  loc_src_geometry; /* local source geometry only (from config file) */
00205    struct fbuf_t  enc_out; /* encoder output buffer, allocated in video_out_init() */
00206 
00207    struct video_codec_desc *enc; /* encoder */
00208    void     *enc_ctx;   /* encoding context */
00209    AVCodec     *codec;
00210    AVFrame     *enc_in_frame; /* enc_in mapped into avcodec format. */
00211                /* The initial part of AVFrame is an AVPicture */
00212    int      mtu;
00213    
00214    /* Table of devices specified with "videodevice=" in oss.conf.
00215     * Static size as we have a limited number of entries.
00216     */
00217    struct video_device  devices[MAX_VIDEO_SOURCES]; 
00218    int         device_num; /*number of devices in table*/
00219    int         device_primary; /*index of the actual primary device in the table*/
00220    int         device_secondary; /*index of the actual secondary device in the table*/
00221 
00222    int         picture_in_picture; /*Is the PiP mode activated? 0 = NO | 1 = YES*/
00223 
00224    /* these are the coordinates of the picture inside the picture (visible if PiP mode is active) 
00225    these coordinates are valid considering the containing buffer with cif geometry*/
00226    int         pip_x;
00227    int         pip_y;
00228 };
00229 
00230 /*
00231  * The overall descriptor, with room for config info, video source and
00232  * received data descriptors, SDL info, etc.
00233  * This should be globally visible to all modules (grabber, vcodecs, gui)
00234  * and contain all configurtion info.
00235  */
00236 struct video_desc {
00237    char        codec_name[64];   /* the codec we use */
00238 
00239    int         stayopen;   /* set if gui starts manually */
00240    pthread_t      vthread; /* video thread */
00241    ast_mutex_t    dec_lock;   /* sync decoder and video thread */
00242    int         shutdown;   /* set to shutdown vthread */
00243    struct ast_channel   *owner;     /* owner channel */
00244 
00245 
00246    struct fbuf_t  enc_in;     /* encoder input buffer, allocated in video_out_init() */
00247 
00248    char        keypad_file[256]; /* image for the keypad */
00249    char                    keypad_font[256];       /* font for the keypad */
00250 
00251    char        sdl_videodriver[256];
00252 
00253    struct fbuf_t     rem_dpy; /* display remote video, no buffer (it is in win[WIN_REMOTE].bmp) */
00254    struct fbuf_t     loc_dpy; /* display local source, no buffer (managed by SDL in bmp[1]) */
00255 
00256    /* geometry of the thumbnails for all video sources. */
00257    struct fbuf_t     src_dpy[MAX_VIDEO_SOURCES]; /* no buffer allocated here */
00258 
00259    int frame_freeze; /* flag to freeze the incoming frame */
00260 
00261    /* local information for grabbers, codecs, gui */
00262    struct gui_info      *gui;
00263    struct video_dec_desc   *in;     /* remote video descriptor */
00264    struct video_out_desc   out;     /* local video descriptor */
00265 };
00266 
00267 static AVPicture *fill_pict(struct fbuf_t *b, AVPicture *p);
00268 
00269 void fbuf_free(struct fbuf_t *b)
00270 {
00271    struct fbuf_t x = *b;
00272 
00273    if (b->data && b->size)
00274       ast_free(b->data);
00275    memset(b, '\0', sizeof(*b));
00276    /* restore some fields */
00277    b->w = x.w;
00278    b->h = x.h;
00279    b->pix_fmt = x.pix_fmt;
00280 }
00281 
00282 /* return the status of env->stayopen to chan_oss, as the latter
00283  * does not have access to fields of struct video_desc
00284  */
00285 int get_gui_startup(struct video_desc* env)
00286 {
00287    return env ? env->stayopen : 0;
00288 }
00289 
00290 #if 0
00291 /* helper function to print the amount of memory used by the process.
00292  * Useful to track memory leaks, unfortunately this code is OS-specific
00293  * so we keep it commented out.
00294  */
00295 static int
00296 used_mem(const char *msg)
00297 {
00298    char in[128];
00299 
00300    pid_t pid = getpid();
00301    sprintf(in, "ps -o vsz= -o rss= %d", pid);
00302    ast_log(LOG_WARNING, "used mem (vsize, rss) %s ", msg);
00303    system(in);
00304    return 0;
00305 }
00306 #endif
00307    
00308 #include "vcodecs.c"
00309 #include "console_gui.c"
00310 
00311 /*! \brief Try to open video sources, return 0 on success, 1 on error
00312  * opens all video sources found in the oss.conf configuration files.
00313  * Saves the grabber and the datas in the device table (in the devices field
00314  * of the descriptor referenced by v).
00315  * Initializes the device_primary and device_secondary
00316  * fields of v with the first devices that was
00317  * successfully opened.
00318  *
00319  * \param v = video out environment descriptor
00320  *
00321  * returns 0 on success, 1 on error 
00322 */
00323 static int grabber_open(struct video_out_desc *v)
00324 {
00325    struct grab_desc *g;
00326    void *g_data;
00327    int i, j;
00328 
00329    /* for each device in the device table... */
00330    for (i = 0; i < v->device_num; i++) {
00331       /* device already open */
00332       if (v->devices[i].grabber)
00333          continue;
00334       /* for each type of grabber supported... */
00335       for (j = 0; (g = console_grabbers[j]); j++) {
00336          /* the grabber is opened and the informations saved in the device table */
00337          g_data = g->open(v->devices[i].name, &v->loc_src_geometry, v->fps);
00338          if (!g_data)
00339             continue;
00340          v->devices[i].grabber = g;
00341          v->devices[i].grabber_data = g_data;
00342          v->devices[i].status_index |= IS_ON;
00343       }
00344    }
00345    /* the first working device is selected as the primary one and the secondary one */
00346    for (i = 0; i < v->device_num; i++) {
00347       if (!v->devices[i].grabber) 
00348          continue;
00349       v->device_primary = i;
00350       v->device_secondary = i;
00351       return 0; /* source found */
00352    }
00353    return 1; /* no source found */
00354 }
00355 
00356 
00357 /*! \brief complete a buffer from the specified local video source.
00358  * Called by get_video_frames(), in turn called by the video thread.
00359  *
00360  * \param dev = video environment descriptor
00361  * \param fps = frame per seconds, for every device
00362  *
00363  * returns:
00364  * - NULL on falure
00365  * - reference to the device buffer on success
00366  */
00367 static struct fbuf_t *grabber_read(struct video_device *dev, int fps)
00368 {
00369    struct timeval now = ast_tvnow();
00370 
00371    if (dev->grabber == NULL) /* not initialized */
00372       return NULL;
00373    
00374    /* the last_frame field in this row of the device table (dev)
00375    is always initialized, it is set during the parsing of the config
00376    file, and never unset, function fill_device_table(). */
00377    /* check if it is time to read */
00378    if (ast_tvdiff_ms(now, dev->last_frame) < 1000/fps)
00379       return NULL; /* too early */
00380    dev->last_frame = now; /* XXX actually, should correct for drift */
00381    return dev->grabber->read(dev->grabber_data);
00382 }
00383 
00384 /*! \brief handler run when dragging with the left button on
00385  * the local source window - the effect is to move the offset
00386  * of the captured area.
00387  */
00388 static void grabber_move(struct video_device *dev, int dx, int dy)
00389 {
00390    if (dev->grabber && dev->grabber->move)
00391                 dev->grabber->move(dev->grabber_data, dx, dy);
00392 }
00393 
00394 /*
00395  * Map the codec name to the library. If not recognised, use a default.
00396  * This is useful in the output path where we decide by name, presumably.
00397  */
00398 static struct video_codec_desc *map_config_video_format(char *name)
00399 {
00400    int i;
00401 
00402    for (i = 0; supported_codecs[i]; i++)
00403       if (!strcasecmp(name, supported_codecs[i]->name))
00404          break;
00405    if (supported_codecs[i] == NULL) {
00406       ast_log(LOG_WARNING, "Cannot find codec for '%s'\n", name);
00407       i = 0;
00408       strcpy(name, supported_codecs[i]->name);
00409    }
00410    ast_log(LOG_WARNING, "Using codec '%s'\n", name);
00411    return supported_codecs[i];
00412 }
00413 
00414 
00415 /*! \brief uninitialize the descriptor for local video stream */
00416 static int video_out_uninit(struct video_desc *env)
00417 {
00418    struct video_out_desc *v = &env->out;
00419    int i; /* integer variable used as iterator */
00420    
00421    /* XXX this should be a codec callback */
00422    if (v->enc_ctx) {
00423       AVCodecContext *enc_ctx = (AVCodecContext *)v->enc_ctx;
00424       avcodec_close(enc_ctx);
00425       av_free(enc_ctx);
00426       v->enc_ctx = NULL;
00427    }
00428    if (v->enc_in_frame) {
00429       av_free(v->enc_in_frame);
00430       v->enc_in_frame = NULL;
00431    }
00432    v->codec = NULL;  /* nothing to free, this is only a reference */
00433    /* release the buffers */
00434    fbuf_free(&env->enc_in);
00435    fbuf_free(&v->enc_out);
00436    /* close the grabbers */
00437    for (i = 0; i < v->device_num; i++) {
00438       if (v->devices[i].grabber){
00439          v->devices[i].grabber_data =
00440             v->devices[i].grabber->close(v->devices[i].grabber_data);
00441          v->devices[i].grabber = NULL;
00442          /* dev_buf is already freed by grabber->close() */
00443          v->devices[i].dev_buf = NULL;
00444       }
00445       v->devices[i].status_index = 0;
00446    }
00447    v->picture_in_picture = 0;
00448    env->frame_freeze = 0;
00449    return -1;
00450 }
00451 
00452 /*
00453  * Initialize the encoder for the local source:
00454  * - enc_ctx, codec, enc_in_frame are used by ffmpeg for encoding;
00455  * - enc_out is used to store the encoded frame (to be sent)
00456  * - mtu is used to determine the max size of video fragment
00457  * NOTE: we enter here with the video source already open.
00458  */
00459 static int video_out_init(struct video_desc *env)
00460 {
00461    int codec;
00462    int size;
00463    struct fbuf_t *enc_in;
00464    struct video_out_desc *v = &env->out;
00465 
00466    v->enc_ctx     = NULL;
00467    v->codec    = NULL;
00468    v->enc_in_frame      = NULL;
00469    v->enc_out.data      = NULL;
00470 
00471    codec = map_video_format(v->enc->format, CM_WR);
00472    v->codec = avcodec_find_encoder(codec);
00473    if (!v->codec) {
00474       ast_log(LOG_WARNING, "Cannot find the encoder for format %d\n",
00475          codec);
00476       return -1;  /* error, but nothing to undo yet */
00477    }
00478 
00479    v->mtu = 1400; /* set it early so the encoder can use it */
00480 
00481    /* allocate the input buffer for encoding.
00482     * ffmpeg only supports PIX_FMT_YUV420P for the encoding.
00483     */
00484    enc_in = &env->enc_in;
00485    enc_in->pix_fmt = PIX_FMT_YUV420P;
00486    enc_in->size = (enc_in->w * enc_in->h * 3)/2;
00487    enc_in->data = ast_calloc(1, enc_in->size);
00488    if (!enc_in->data) {
00489       ast_log(LOG_WARNING, "Cannot allocate encoder input buffer\n");
00490       return video_out_uninit(env);
00491    }
00492    /* construct an AVFrame that points into buf_in */
00493    v->enc_in_frame = avcodec_alloc_frame();
00494    if (!v->enc_in_frame) {
00495       ast_log(LOG_WARNING, "Unable to allocate the encoding video frame\n");
00496       return video_out_uninit(env);
00497    }
00498 
00499    /* parameters for PIX_FMT_YUV420P */
00500    size = enc_in->w * enc_in->h;
00501    v->enc_in_frame->data[0] = enc_in->data;
00502    v->enc_in_frame->data[1] = v->enc_in_frame->data[0] + size;
00503    v->enc_in_frame->data[2] = v->enc_in_frame->data[1] + size/4;
00504    v->enc_in_frame->linesize[0] = enc_in->w;
00505    v->enc_in_frame->linesize[1] = enc_in->w/2;
00506    v->enc_in_frame->linesize[2] = enc_in->w/2;
00507 
00508    /* now setup the parameters for the encoder.
00509     * XXX should be codec-specific
00510     */
00511     {
00512    AVCodecContext *enc_ctx = avcodec_alloc_context();
00513    v->enc_ctx = enc_ctx;
00514    enc_ctx->pix_fmt = enc_in->pix_fmt;
00515    enc_ctx->width = enc_in->w;
00516    enc_ctx->height = enc_in->h;
00517    /* XXX rtp_callback ?
00518     * rtp_mode so ffmpeg inserts as many start codes as possible.
00519     */
00520    enc_ctx->rtp_mode = 1;
00521    enc_ctx->rtp_payload_size = v->mtu / 2; // mtu/2
00522    enc_ctx->bit_rate = v->bitrate;
00523    enc_ctx->bit_rate_tolerance = enc_ctx->bit_rate/2;
00524    enc_ctx->qmin = v->qmin;   /* should be configured */
00525    enc_ctx->time_base = (AVRational){1, v->fps};
00526    enc_ctx->gop_size = v->fps*5; // emit I frame every 5 seconds
00527 
00528    v->enc->enc_init(v->enc_ctx);
00529  
00530    if (avcodec_open(enc_ctx, v->codec) < 0) {
00531       ast_log(LOG_WARNING, "Unable to initialize the encoder %d\n",
00532          codec);
00533       av_free(enc_ctx);
00534       v->enc_ctx = NULL;
00535       return video_out_uninit(env);
00536    }
00537     }
00538    /*
00539     * Allocate enough for the encoded bitstream. As we are compressing,
00540     * we hope that the output is never larger than the input size.
00541     */
00542    v->enc_out.data = ast_calloc(1, enc_in->size);
00543    v->enc_out.size = enc_in->size;
00544    v->enc_out.used = 0;
00545 
00546    return 0;
00547 }
00548 
00549 /*! \brief possibly uninitialize the video console.
00550  * Called at the end of a call, should reset the 'owner' field,
00551  * then possibly terminate the video thread if the gui has
00552  * not been started manually.
00553  * In practice, signal the thread and give it a bit of time to
00554  * complete, giving up if it gets stuck. Because uninit
00555  * is called from hangup with the channel locked, and the thread
00556  * uses the chan lock, we need to unlock here. This is unsafe,
00557  * and we should really use refcounts for the channels.
00558  */
00559 void console_video_uninit(struct video_desc *env)
00560 {
00561    int i, t = 100;   /* initial wait is shorter, than make it longer */
00562    if (env->stayopen == 0) { /* gui opened by a call, do the shutdown */
00563       env->shutdown = 1;
00564       for (i=0; env->shutdown && i < 10; i++) {
00565          if (env->owner)
00566             ast_channel_unlock(env->owner);
00567          usleep(t);
00568          t = 1000000;
00569          if (env->owner)
00570             ast_channel_lock(env->owner);
00571       }
00572       env->vthread = NULL;
00573    }
00574    env->owner = NULL;   /* this is unconditional */
00575 }
00576 
00577 /*! fill an AVPicture from our fbuf info, as it is required by
00578  * the image conversion routines in ffmpeg. Note that the pointers
00579  * are recalculated if the fbuf has an offset (and so represents a picture in picture)
00580  * XXX This depends on the format.
00581  */
00582 static AVPicture *fill_pict(struct fbuf_t *b, AVPicture *p)
00583 {
00584    /* provide defaults for commonly used formats */
00585    int l4 = b->w * b->h/4; /* size of U or V frame */
00586    int len = b->w;      /* Y linesize, bytes */
00587    int luv = b->w/2; /* U/V linesize, bytes */
00588    int sample_size = 1;
00589    
00590    memset(p, '\0', sizeof(*p));
00591    switch (b->pix_fmt) {
00592    case PIX_FMT_RGB555:
00593    case PIX_FMT_RGB565:
00594       sample_size = 2;
00595       luv = 0;
00596       break;
00597    case PIX_FMT_RGBA32:
00598       sample_size = 4;
00599       luv = 0;
00600       break;
00601    case PIX_FMT_YUYV422:   /* Packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr */
00602       sample_size = 2;  /* all data in first plane, probably */
00603       luv = 0;
00604       break;
00605    }
00606    len *= sample_size;
00607    
00608    p->data[0] = b->data;
00609    p->linesize[0] = len;
00610    /* these are only valid for component images */
00611    p->data[1] = luv ? b->data + 4*l4 : b->data+len;
00612    p->data[2] = luv ? b->data + 5*l4 : b->data+len;
00613    p->linesize[1] = luv;
00614    p->linesize[2] = luv;
00615    
00616    /* add the offsets to the pointers previously calculated, 
00617    it is necessary for the picture in picture mode */
00618    p->data[0] += len*b->win_y + b->win_x*sample_size;
00619    if (luv) { 
00620       p->data[1] += luv*(b->win_y/2) + (b->win_x/2) * sample_size;
00621       p->data[2] += luv*(b->win_y/2) + (b->win_x/2) * sample_size;
00622    }
00623    return p;
00624 }
00625 
00626 /*! convert/scale between an input and an output format.
00627  * Old version of ffmpeg only have img_convert, which does not rescale.
00628  * New versions use sws_scale which does both.
00629  */
00630 static void my_scale(struct fbuf_t *in, AVPicture *p_in,
00631    struct fbuf_t *out, AVPicture *p_out)
00632 {
00633    AVPicture my_p_in, my_p_out;
00634    int eff_w=out->w, eff_h=out->h;
00635 
00636    if (p_in == NULL)
00637       p_in = fill_pict(in, &my_p_in);
00638    if (p_out == NULL)
00639       p_out = fill_pict(out, &my_p_out);
00640    
00641    /*if win_w is different from zero then we must change 
00642    the size of the scaled buffer (the position is already 
00643    encoded into the out parameter)*/
00644    if (out->win_w) { /* picture in picture enabled */
00645       eff_w=out->win_w;
00646       eff_h=out->win_h;
00647    }
00648 #ifdef OLD_FFMPEG
00649    /* XXX img_convert is deprecated, and does not do rescaling, PiP not supported */
00650    img_convert(p_out, out->pix_fmt,
00651       p_in, in->pix_fmt, in->w, in->h);
00652 #else /* XXX replacement */
00653     {
00654    struct SwsContext *convert_ctx;
00655    
00656    convert_ctx = sws_getContext(in->w, in->h, in->pix_fmt,
00657       eff_w, eff_h, out->pix_fmt,
00658       SWS_BICUBIC, NULL, NULL, NULL);
00659    if (convert_ctx == NULL) {
00660       ast_log(LOG_ERROR, "FFMPEG::convert_cmodel : swscale context initialization failed");
00661       return;
00662    }
00663    if (0)
00664       ast_log(LOG_WARNING, "in %d %dx%d out %d %dx%d\n",
00665          in->pix_fmt, in->w, in->h, out->pix_fmt, eff_w, eff_h);
00666    sws_scale(convert_ctx,
00667       p_in->data, p_in->linesize,
00668       in->w, in->h, /* src slice */
00669       p_out->data, p_out->linesize);
00670 
00671    sws_freeContext(convert_ctx);
00672     }
00673 #endif /* XXX replacement */
00674 }
00675 
00676 struct video_desc *get_video_desc(struct ast_channel *c);
00677 
00678 /*
00679  * This function is called (by asterisk) for each video packet
00680  * coming from the network (the 'in' path) that needs to be processed.
00681  * We need to reconstruct the entire video frame before we can decode it.
00682  * After a video packet is received we have to:
00683  * - extract the bitstream with pre_process_data()
00684  * - append the bitstream to a buffer
00685  * - if the fragment is the last (RTP Marker) we decode it with decode_video()
00686  * - after the decoding is completed we display the decoded frame with show_frame()
00687  */
00688 int console_write_video(struct ast_channel *chan, struct ast_frame *f);
00689 int console_write_video(struct ast_channel *chan, struct ast_frame *f)
00690 {
00691    struct video_desc *env = get_video_desc(chan);
00692    struct video_dec_desc *v = env->in;
00693 
00694    if (!env->gui) /* no gui, no rendering */
00695       return 0;
00696    if (v == NULL)
00697       env->in = v = dec_init(f->subclass & ~1);
00698    if (v == NULL) {
00699       /* This is not fatal, but we won't have incoming video */
00700       ast_log(LOG_WARNING, "Cannot initialize input decoder\n");
00701       return 0;
00702    }
00703 
00704    if (v->dec_in_cur == NULL) /* no buffer for incoming frames, drop */
00705       return 0;
00706 #if defined(DROP_PACKETS) && DROP_PACKETS > 0
00707    /* Simulate lost packets */
00708    if ((random() % 10000) <= 100*DROP_PACKETS) {
00709       ast_log(LOG_NOTICE, "Packet lost [%d]\n", f->seqno);
00710       return 0;
00711    }
00712 #endif
00713    if (v->discard) {
00714       /*
00715        * In discard mode, drop packets until we find one with
00716        * the RTP marker set (which is the end of frame).
00717        * Note that the RTP marker flag is sent as the LSB of the
00718        * subclass, which is a  bitmask of formats. The low bit is
00719        * normally used for audio so there is no interference.
00720        */
00721       if (f->subclass & 0x01) {
00722          v->dec_in_cur->used = 0;
00723          v->dec_in_cur->ebit = 0;
00724          v->next_seq = f->seqno + 1;   /* wrap at 16 bit */
00725          v->discard = 0;
00726          ast_log(LOG_WARNING, "out of discard mode, frame %d\n", f->seqno);
00727       }
00728       return 0;
00729    }
00730 
00731    /*
00732     * Only in-order fragments will be accepted. Remember seqno
00733     * has 16 bit so there is wraparound. Also, ideally we could
00734     * accept a bit of reordering, but at the moment we don't.
00735     */
00736    if (v->next_seq != f->seqno) {
00737       ast_log(LOG_WARNING, "discarding frame out of order, %d %d\n",
00738          v->next_seq, f->seqno);
00739       v->discard = 1;
00740       return 0;
00741    }
00742    v->next_seq++;
00743 
00744    if (f->data.ptr == NULL || f->datalen < 2) {
00745       ast_log(LOG_WARNING, "empty video frame, discard\n");
00746       return 0;
00747    }
00748    if (v->d_callbacks->dec_decap(v->dec_in_cur, f->data.ptr, f->datalen)) {
00749       ast_log(LOG_WARNING, "error in dec_decap, enter discard\n");
00750       v->discard = 1;
00751    }
00752    if (f->subclass & 0x01) {  // RTP Marker
00753       /* prepare to decode: advance the buffer so the video thread knows. */
00754       struct fbuf_t *tmp = v->dec_in_cur; /* store current pointer */
00755       ast_mutex_lock(&env->dec_lock);
00756       if (++v->dec_in_cur == &v->dec_in[N_DEC_IN]) /* advance to next, circular */
00757          v->dec_in_cur = &v->dec_in[0];
00758       if (v->dec_in_dpy == NULL) {  /* were not displaying anything, so set it */
00759          v->dec_in_dpy = tmp;
00760       } else if (v->dec_in_dpy == v->dec_in_cur) { /* current slot is busy */
00761          v->dec_in_cur = NULL;
00762       }
00763       ast_mutex_unlock(&env->dec_lock);
00764    }
00765    return 0;
00766 }
00767 
00768 
00769 /*! \brief refreshes the buffers of all the device by calling the
00770  * grabber_read on each device in the device table.
00771  * it encodes the primary source buffer, if the picture in picture mode is
00772  * enabled it encodes (in the buffer to split) the secondary source buffer too.
00773  * The encoded buffer is splitted to build the local and the remote view.
00774  * Return a list of ast_frame representing the video fragments.
00775  * The head pointer is returned by the function, the tail pointer
00776  * is returned as an argument.
00777  *
00778  * \param env = video environment descriptor
00779  * \param tail = tail ponter (pratically a return value)
00780  */
00781 static struct ast_frame *get_video_frames(struct video_desc *env, struct ast_frame **tail)
00782 {
00783    struct video_out_desc *v = &env->out;
00784    struct ast_frame *dummy;
00785    struct fbuf_t *loc_src_primary = NULL, *p_read;
00786    int i;
00787    /* if no device was found in the config file */
00788    if (!env->out.device_num)
00789       return NULL;
00790    /* every time this function is called we refresh the buffers of every device,
00791    updating the private device buffer in the device table */
00792    for (i = 0; i < env->out.device_num; i++) {
00793       p_read = grabber_read(&env->out.devices[i], env->out.fps);
00794       /* it is used only if different from NULL, we mantain last good buffer otherwise */
00795       if (p_read)
00796          env->out.devices[i].dev_buf = p_read;
00797    }
00798    /* select the primary device buffer as the one to encode */
00799    loc_src_primary = env->out.devices[env->out.device_primary].dev_buf;
00800    /* loc_src_primary can be NULL if the device has been turned off during
00801    execution of it is read too early */
00802    if (loc_src_primary) {
00803       /* Scale the video for the encoder, then use it for local rendering
00804       so we will see the same as the remote party */
00805       my_scale(loc_src_primary, NULL, &env->enc_in, NULL);
00806    }
00807    if (env->out.picture_in_picture) { /* the picture in picture mode is enabled */
00808       struct fbuf_t *loc_src_secondary;
00809       /* reads from the secondary source */
00810       loc_src_secondary = env->out.devices[env->out.device_secondary].dev_buf;
00811       if (loc_src_secondary) {
00812          env->enc_in.win_x = env->out.pip_x;
00813          env->enc_in.win_y = env->out.pip_y;
00814          env->enc_in.win_w = env->enc_in.w/3;
00815          env->enc_in.win_h = env->enc_in.h/3;
00816          /* scales to the correct geometry and inserts in
00817          the enc_in buffer the picture in picture */
00818          my_scale(loc_src_secondary, NULL, &env->enc_in, NULL);
00819          /* returns to normal parameters (not picture in picture) */
00820          env->enc_in.win_x = 0;
00821          env->enc_in.win_y = 0;
00822          env->enc_in.win_w = 0;
00823          env->enc_in.win_h = 0;
00824       }
00825       else {
00826          /* loc_src_secondary can be NULL if the device has been turned off during
00827          execution of it is read too early */
00828          env->out.picture_in_picture = 0; /* disable picture in picture */
00829       }
00830    }
00831    show_frame(env, WIN_LOCAL); /* local rendering */
00832    for (i = 0; i < env->out.device_num; i++) 
00833       show_frame(env, i+WIN_SRC1); /* rendering of every source device in thumbnails */
00834    if (tail == NULL)
00835       tail = &dummy;
00836    *tail = NULL;
00837    /* if no reason for encoding, do not encode */
00838    if (!env->owner || !loc_src_primary || !v->sendvideo)
00839       return NULL;
00840    if (v->enc_out.data == NULL) {
00841       static volatile int a = 0;
00842       if (a++ < 2)
00843          ast_log(LOG_WARNING, "fail, no encoder output buffer\n");
00844       return NULL;
00845    }
00846    v->enc->enc_run(v);
00847    return v->enc->enc_encap(&v->enc_out, v->mtu, tail);
00848 }
00849 
00850 /*
00851  * Helper thread to periodically poll the video sources and enqueue the
00852  * generated frames directed to the remote party to the channel's queue.
00853  * Using a separate thread also helps because the encoding can be
00854  * computationally expensive so we don't want to starve the main thread.
00855  */
00856 static void *video_thread(void *arg)
00857 {
00858    struct video_desc *env = arg;
00859    int count = 0;
00860    char save_display[128] = "";
00861    int i; /* integer variable used as iterator */
00862 
00863    /* if sdl_videodriver is set, override the environment. Also,
00864     * if it contains 'console' override DISPLAY around the call to SDL_Init
00865     * so we use the console as opposed to the x11 version of aalib
00866     */
00867    if (!ast_strlen_zero(env->sdl_videodriver)) { /* override */
00868       const char *s = getenv("DISPLAY");
00869       setenv("SDL_VIDEODRIVER", env->sdl_videodriver, 1);
00870       if (s && !strcasecmp(env->sdl_videodriver, "aalib-console")) {
00871          ast_copy_string(save_display, s, sizeof(save_display));
00872          unsetenv("DISPLAY");
00873       }
00874    }
00875    sdl_setup(env);
00876    if (!ast_strlen_zero(save_display))
00877       setenv("DISPLAY", save_display, 1);
00878 
00879    ast_mutex_init(&env->dec_lock);  /* used to sync decoder and renderer */
00880 
00881    if (grabber_open(&env->out)) {
00882       ast_log(LOG_WARNING, "cannot open local video source\n");
00883    } 
00884 
00885    if (env->out.device_num)
00886       env->out.devices[env->out.device_primary].status_index |= IS_PRIMARY | IS_SECONDARY;
00887    
00888    /* even if no device is connected, we must call video_out_init,
00889     * as some of the data structures it initializes are
00890     * used in get_video_frames()
00891     */
00892    video_out_init(env);
00893 
00894    /* Writes intial status of the sources. */
00895    if (env->gui) {
00896        for (i = 0; i < env->out.device_num; i++) {
00897       print_message(env->gui->thumb_bd_array[i].board,
00898        src_msgs[env->out.devices[i].status_index]);
00899        }
00900    }
00901 
00902    for (;;) {
00903       struct timeval t = { 0, 50000 }; /* XXX 20 times/sec */
00904       struct ast_frame *p, *f;
00905       struct ast_channel *chan;
00906       int fd;
00907       char *caption = NULL, buf[160];
00908 
00909       /* determine if video format changed */
00910       if (count++ % 10 == 0) {
00911          if (env->out.sendvideo && env->out.devices)
00912              sprintf(buf, "%s %s %dx%d @@ %dfps %dkbps",
00913             env->out.devices[env->out.device_primary].name, env->codec_name,
00914             env->enc_in.w, env->enc_in.h,
00915             env->out.fps, env->out.bitrate/1000);
00916          else
00917              sprintf(buf, "hold");
00918          caption = buf;
00919       }
00920 
00921       /* manage keypad events */
00922       /* XXX here we should always check for events,
00923       * otherwise the drag will not work */ 
00924       if (env->gui)
00925          eventhandler(env, caption);
00926  
00927       /* sleep for a while */
00928       ast_select(0, NULL, NULL, NULL, &t);
00929 
00930        if (env->in) {
00931       struct video_dec_desc *v = env->in;
00932       
00933       /*
00934        * While there is something to display, call the decoder and free
00935        * the buffer, possibly enabling the receiver to store new data.
00936        */
00937       while (v->dec_in_dpy) {
00938          struct fbuf_t *tmp = v->dec_in_dpy; /* store current pointer */
00939 
00940          /* decode the frame, but show it only if not frozen */
00941          if (v->d_callbacks->dec_run(v, tmp) && !env->frame_freeze)
00942             show_frame(env, WIN_REMOTE);
00943          tmp->used = 0; /* mark buffer as free */
00944          tmp->ebit = 0;
00945          ast_mutex_lock(&env->dec_lock);
00946          if (++v->dec_in_dpy == &v->dec_in[N_DEC_IN]) /* advance to next, circular */
00947             v->dec_in_dpy = &v->dec_in[0];
00948 
00949          if (v->dec_in_cur == NULL) /* receiver was idle, enable it... */
00950             v->dec_in_cur = tmp; /* using the slot just freed */
00951          else if (v->dec_in_dpy == v->dec_in_cur) /* this was the last slot */
00952             v->dec_in_dpy = NULL;   /* nothing more to display */
00953          ast_mutex_unlock(&env->dec_lock);
00954       }
00955        }
00956 
00957       if (env->shutdown)
00958          break;
00959       f = get_video_frames(env, &p);   /* read and display */
00960       if (!f)
00961          continue;
00962       chan = env->owner;
00963       if (chan == NULL) {
00964          /* drop the chain of frames, nobody uses them */
00965          while (f) {
00966             struct ast_frame *g = AST_LIST_NEXT(f, frame_list);
00967             ast_frfree(f);
00968             f = g;
00969          }
00970          continue;
00971       }
00972       fd = chan->alertpipe[1];
00973       ast_channel_lock(chan);
00974 
00975       /* AST_LIST_INSERT_TAIL is only good for one frame, cannot use here */
00976       if (chan->readq.first == NULL) {
00977          chan->readq.first = f;
00978       } else {
00979          chan->readq.last->frame_list.next = f;
00980       }
00981       chan->readq.last = p;
00982       /*
00983        * more or less same as ast_queue_frame, but extra
00984        * write on the alertpipe to signal frames.
00985        */
00986       if (fd > -1) {
00987          int blah = 1, l = sizeof(blah);
00988          for (p = f; p; p = AST_LIST_NEXT(p, frame_list)) {
00989             if (write(fd, &blah, l) != l)
00990                ast_log(LOG_WARNING, "Unable to write to alert pipe on %s, frametype/subclass %d/%d: %s!\n",
00991                    chan->name, f->frametype, f->subclass, strerror(errno));
00992          }
00993       }
00994       ast_channel_unlock(chan);
00995    }
00996    /* thread terminating, here could call the uninit */
00997    /* uninitialize the local and remote video environments */
00998    env->in = dec_uninit(env->in);
00999    video_out_uninit(env);
01000 
01001    if (env->gui)
01002       env->gui = cleanup_sdl(env->gui, env->out.device_num);
01003    ast_mutex_destroy(&env->dec_lock);
01004    env->shutdown = 0;
01005    return NULL;
01006 }
01007 
01008 static void copy_geometry(struct fbuf_t *src, struct fbuf_t *dst)
01009 {
01010    if (dst->w == 0)
01011       dst->w = src->w;
01012    if (dst->h == 0)
01013       dst->h = src->h;
01014 }
01015 
01016 /*! initialize the video environment.
01017  * Apart from the formats (constant) used by sdl and the codec,
01018  * we use enc_in as the basic geometry.
01019  */
01020 static void init_env(struct video_desc *env)
01021 {
01022    struct fbuf_t *c = &(env->out.loc_src_geometry);      /* local source */
01023    struct fbuf_t *ei = &(env->enc_in);    /* encoder input */
01024    struct fbuf_t *ld = &(env->loc_dpy);   /* local display */
01025    struct fbuf_t *rd = &(env->rem_dpy);      /* remote display */
01026    int i; /* integer working as iterator */
01027 
01028    c->pix_fmt = PIX_FMT_YUV420P; /* default - camera format */
01029    ei->pix_fmt = PIX_FMT_YUV420P;   /* encoder input */
01030    if (ei->w == 0 || ei->h == 0) {
01031       ei->w = 352;
01032       ei->h = 288;
01033    }
01034    ld->pix_fmt = rd->pix_fmt = PIX_FMT_YUV420P; /* sdl format */
01035    /* inherit defaults */
01036    copy_geometry(ei, c);   /* camera inherits from encoder input */
01037    copy_geometry(ei, rd);  /* remote display inherits from encoder input */
01038    copy_geometry(rd, ld);  /* local display inherits from remote display */
01039 
01040    /* fix the size of buffers for small windows */
01041    for (i = 0; i < env->out.device_num; i++) {
01042       env->src_dpy[i].pix_fmt = PIX_FMT_YUV420P;
01043       env->src_dpy[i].w = SRC_WIN_W;
01044       env->src_dpy[i].h = SRC_WIN_H;
01045    }
01046    /* now we set the default coordinates for the picture in picture
01047    frames inside the env_in buffers, those can be changed by dragging the
01048    picture in picture with left click */
01049    env->out.pip_x = ei->w - ei->w/3;
01050    env->out.pip_y = ei->h - ei->h/3;
01051 }
01052 
01053 /*!
01054  * The first call to the video code, called by oss_new() or similar.
01055  * Here we initialize the various components we use, namely SDL for display,
01056  * ffmpeg for encoding/decoding, and a local video source.
01057  * We do our best to progress even if some of the components are not
01058  * available.
01059  */
01060 void console_video_start(struct video_desc *env, struct ast_channel *owner)
01061 {
01062    ast_log(LOG_WARNING, "env %p chan %p\n", env, owner);
01063    if (env == NULL)  /* video not initialized */
01064       return;
01065    env->owner = owner;  /* work even if no owner is specified */
01066    if (env->vthread)
01067       return;     /* already initialized, nothing to do */
01068    init_env(env);
01069    env->out.enc = map_config_video_format(env->codec_name);
01070 
01071    ast_log(LOG_WARNING, "start video out %s %dx%d\n",
01072       env->codec_name, env->enc_in.w,  env->enc_in.h);
01073    /*
01074     * Register all codecs supported by the ffmpeg library.
01075     * We only need to do it once, but probably doesn't
01076     * harm to do it multiple times.
01077     */
01078    avcodec_init();
01079    avcodec_register_all();
01080    av_log_set_level(AV_LOG_ERROR);  /* only report errors */
01081 
01082    if (env->out.fps == 0) {
01083       env->out.fps = 15;
01084       ast_log(LOG_WARNING, "fps unset, forcing to %d\n", env->out.fps);
01085    }
01086    if (env->out.bitrate == 0) {
01087       env->out.bitrate = 65000;
01088       ast_log(LOG_WARNING, "bitrate unset, forcing to %d\n", env->out.bitrate);
01089    }
01090    /* create the thread as detached so memory is freed on termination */
01091    ast_pthread_create_detached_background(&env->vthread,
01092       NULL, video_thread, env);
01093 }
01094 
01095 /*
01096  * Parse a geometry string, accepting also common names for the formats.
01097  * Trick: if we have a leading > or < and a numeric geometry,
01098  * return the larger or smaller one.
01099  * E.g. <352x288 gives the smaller one, 320x240
01100  */
01101 static int video_geom(struct fbuf_t *b, const char *s)
01102 {
01103    int w = 0, h = 0;
01104 
01105    static struct {
01106       const char *s; int w; int h;
01107    } *fp, formats[] = {
01108       {"16cif",   1408, 1152 },
01109       {"xga",     1024, 768 },
01110       {"4cif", 704, 576 },
01111       {"vga",     640, 480 },
01112       {"cif",     352, 288 },
01113       {"qvga", 320, 240 },
01114       {"qcif", 176, 144 },
01115       {"sqcif",   128, 96 },
01116       {NULL,      0, 0 },
01117    };
01118    if (*s == '<' || *s == '>')
01119       sscanf(s+1,"%dx%d", &w, &h);
01120    for (fp = formats; fp->s; fp++) {
01121       if (*s == '>') {  /* look for a larger one */
01122          if (fp->w <= w) {
01123             if (fp > formats)
01124                fp--; /* back one step if possible */
01125             break;
01126          }
01127       } else if (*s == '<') { /* look for a smaller one */
01128          if (fp->w < w)
01129             break;
01130       } else if (!strcasecmp(s, fp->s)) { /* look for a string */
01131          break;
01132       }
01133    }
01134    if (*s == '<' && fp->s == NULL)  /* smallest */
01135       fp--;
01136    if (fp->s) {
01137       b->w = fp->w;
01138       b->h = fp->h;
01139    } else if (sscanf(s, "%dx%d", &b->w, &b->h) != 2) {
01140       ast_log(LOG_WARNING, "Invalid video_size %s, using 352x288\n", s);
01141       b->w = 352;
01142       b->h = 288;
01143    }
01144    return 0;
01145 }
01146 
01147 
01148 /*! \brief add an entry to the video_device table,
01149  * ignoring duplicate names.
01150  * The table is a static array of 9 elements.
01151  * The last_frame field of each entry of the table is initialized to
01152  * the current time (we need a value inside this field, on stop of the
01153  * GUI the last_frame value is not changed, to avoid checking if it is 0 we
01154  * set the initial value on current time) XXX
01155  *
01156  * PARAMETERS:
01157  * \param devices_p = pointer to the table of devices
01158  * \param device_num_p = pointer to the number of devices
01159  * \param s = name of the new device to insert
01160  *
01161  * returns 0 on success, 1 on error
01162  */
01163 static int device_table_fill(struct video_device *devices, int *device_num_p, const char *s)
01164 {
01165    int i;
01166    struct video_device *p;
01167 
01168    /* with the current implementation, we support a maximum of 9 devices.*/
01169    if (*device_num_p >= 9)
01170       return 0; /* more devices will be ignored */
01171    /* ignore duplicate names */
01172    for (i = 0; i < *device_num_p; i++) {
01173       if (!strcmp(devices[i].name, s))
01174          return 0;
01175    }
01176    /* inserts the new video device */
01177    p = &devices[*device_num_p];
01178    /* XXX the string is allocated but NEVER deallocated,
01179    the good time to do that is when the module is unloaded, now we skip the problem */
01180    p->name = ast_strdup(s);      /* copy the name */
01181    /* other fields initially NULL */
01182    p->grabber = NULL;
01183    p->grabber_data = NULL;
01184    p->dev_buf = NULL;
01185    p->last_frame = ast_tvnow();
01186    p->status_index = 0;
01187    (*device_num_p)++;         /* one device added */
01188    return 0;
01189 }
01190 
01191 /* extend ast_cli with video commands. Called by console_video_config */
01192 int console_video_cli(struct video_desc *env, const char *var, int fd)
01193 {
01194    if (env == NULL)
01195       return 1;   /* unrecognised */
01196 
01197         if (!strcasecmp(var, "videodevice")) {
01198       ast_cli(fd, "videodevice is [%s]\n", env->out.devices[env->out.device_primary].name);
01199         } else if (!strcasecmp(var, "videocodec")) {
01200       ast_cli(fd, "videocodec is [%s]\n", env->codec_name);
01201         } else if (!strcasecmp(var, "sendvideo")) {
01202       ast_cli(fd, "sendvideo is [%s]\n", env->out.sendvideo ? "on" : "off");
01203         } else if (!strcasecmp(var, "video_size")) {
01204       int in_w = 0, in_h = 0;
01205       if (env->in) {
01206          in_w = env->in->dec_out.w;
01207          in_h = env->in->dec_out.h;
01208       }
01209       ast_cli(fd, "sizes: video %dx%d camera %dx%d local %dx%d remote %dx%d in %dx%d\n",
01210          env->enc_in.w, env->enc_in.h,
01211          env->out.loc_src_geometry.w, env->out.loc_src_geometry.h,
01212          env->loc_dpy.w, env->loc_dpy.h,
01213          env->rem_dpy.w, env->rem_dpy.h,
01214          in_w, in_h);
01215         } else if (!strcasecmp(var, "bitrate")) {
01216       ast_cli(fd, "bitrate is [%d]\n", env->out.bitrate);
01217         } else if (!strcasecmp(var, "qmin")) {
01218       ast_cli(fd, "qmin is [%d]\n", env->out.qmin);
01219         } else if (!strcasecmp(var, "fps")) {
01220       ast_cli(fd, "fps is [%d]\n", env->out.fps);
01221         } else if (!strcasecmp(var, "startgui")) {
01222       env->stayopen = 1;
01223       console_video_start(env, NULL);
01224         } else if (!strcasecmp(var, "stopgui") && env->stayopen != 0) {
01225       env->stayopen = 0;
01226       if (env->gui && env->owner)
01227          ast_cli_command(-1, "console hangup");
01228       else /* not in a call */
01229          console_video_uninit(env);
01230         } else {
01231       return 1;   /* unrecognised */
01232    }
01233    return 0;   /* recognised */
01234 }
01235 
01236 /*! parse config command for video support. */
01237 int console_video_config(struct video_desc **penv,
01238    const char *var, const char *val)
01239 {
01240    struct video_desc *env;
01241 
01242    if (penv == NULL) {
01243       ast_log(LOG_WARNING, "bad argument penv=NULL\n");
01244       return 1;   /* error */
01245    }
01246    /* allocate the video descriptor first time we get here */
01247    env = *penv;
01248    if (env == NULL) {
01249       env = *penv = ast_calloc(1, sizeof(struct video_desc));
01250       if (env == NULL) {
01251          ast_log(LOG_WARNING, "fail to allocate video_desc\n");
01252          return 1;   /* error */
01253       
01254       }
01255       /* set default values - 0's are already there */
01256       env->out.device_primary = 0;
01257       env->out.device_secondary = 0;
01258       env->out.fps = 5;
01259       env->out.bitrate = 65000;
01260       env->out.sendvideo = 1;
01261       env->out.qmin = 3;
01262       env->out.device_num = 0;
01263    }
01264    CV_START(var, val);
01265    CV_F("videodevice", device_table_fill(env->out.devices, &env->out.device_num, val));
01266    CV_BOOL("sendvideo", env->out.sendvideo);
01267    CV_F("video_size", video_geom(&env->enc_in, val));
01268    CV_F("camera_size", video_geom(&env->out.loc_src_geometry, val));
01269    CV_F("local_size", video_geom(&env->loc_dpy, val));
01270    CV_F("remote_size", video_geom(&env->rem_dpy, val));
01271    CV_STR("keypad", env->keypad_file);
01272    CV_F("region", keypad_cfg_read(env->gui, val));
01273    CV_UINT("startgui", env->stayopen); /* enable gui at startup */
01274    CV_STR("keypad_font", env->keypad_font);
01275    CV_STR("sdl_videodriver", env->sdl_videodriver);
01276    CV_UINT("fps", env->out.fps);
01277    CV_UINT("bitrate", env->out.bitrate);
01278    CV_UINT("qmin", env->out.qmin);
01279    CV_STR("videocodec", env->codec_name);
01280    return 1;   /* nothing found */
01281 
01282    CV_END;     /* the 'nothing found' case */
01283    return 0;      /* found something */
01284 }
01285 
01286 #endif   /* video support */

Generated on Wed Aug 18 22:33:51 2010 for Asterisk - the Open Source PBX by  doxygen 1.4.7