mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
RFC 6: Overall cleanups again.
- License should be fixed now (finally) - Added doxygen comments - Cleaned up the X11Grab structure - Renamed X11Grab structure to x11_grab_s - Changed some Java stylish named functions to more C'stylish ones - Changed order of some parameters so they are more libc alike with destination as first parameter - Use AVRational where relevant - Fixed time calculation - Cleaned up a few little tiny things around the sources + removed a goto + removed unused vars + etc... (Patch by Edouard Gomez) Originally committed as revision 7308 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Edouard Gomez
Guillaume Poirier
parent
0235a3116e
commit
6e71a18eda
@ -25,10 +25,16 @@
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/**
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* @file x11grab.c
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* X11 frame device demuxer by Clemens Fruhwirth <clemens@endorphin.org>
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* and Edouard Gomez <ed.gomez@free.fr>.
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*/
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#include "avformat.h"
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#include <unistd.h>
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#include <fcntl.h>
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@ -46,41 +52,53 @@
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#include <sys/shm.h>
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#include <X11/extensions/XShm.h>
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typedef struct
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/**
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* X11 Device Demuxer context
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*/
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typedef struct x11_grab_s
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{
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Display *dpy;
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int frame_format;
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int frame_size;
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int frame_rate;
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int frame_rate_base;
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int64_t time_frame;
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int frame_size; /**< Size in bytes of a grabbed frame */
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AVRational time_base; /**< Time base */
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int64_t time_frame; /**< Current time */
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int height;
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int width;
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int x_off;
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int y_off;
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XImage *image;
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int use_shm;
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XShmSegmentInfo shminfo;
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int mouse_wanted;
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} X11Grab;
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int height; /**< Height of the grab frame */
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int width; /**< Width of the grab frame */
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int x_off; /**< Horizontal top-left corner coordinate */
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int y_off; /**< Vertical top-left corner coordinate */
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Display *dpy; /**< X11 display from which x11grab grabs frames */
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XImage *image; /**< X11 image holding the grab */
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int use_shm; /**< !0 when using XShm extension */
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XShmSegmentInfo shminfo; /**< When using XShm, keeps track of XShm infos */
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} x11_grab_t;
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/**
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* Initializes the x11 grab device demuxer (public device demuxer API).
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*
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* @param s1 Context from avformat core
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* @param ap Parameters from avformat core
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* @return <ul>
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* <li>ENOMEM no memory left</li>
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* <li>AVERROR_IO other failure case</li>
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* <li>0 success</li>
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* </ul>
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*/
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static int
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x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
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{
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X11Grab *x11grab = s1->priv_data;
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x11_grab_t *x11grab = s1->priv_data;
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Display *dpy;
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AVStream *st = NULL;
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int width, height;
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int frame_rate, frame_rate_base, frame_size;
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int input_pixfmt;
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XImage *image;
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int x_off=0; int y_off = 0;
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int x_off = 0;
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int y_off = 0;
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int use_shm;
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dpy = XOpenDisplay(NULL);
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if(!dpy) {
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goto fail;
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av_free(st);
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return AVERROR_IO;
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}
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sscanf(ap->device, "x11:%d,%d", &x_off, &y_off);
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@ -91,11 +109,6 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
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return AVERROR_IO;
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}
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width = ap->width;
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height = ap->height;
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frame_rate = ap->time_base.den;
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frame_rate_base = ap->time_base.num;
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st = av_new_stream(s1, 0);
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if (!st) {
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return -ENOMEM;
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@ -103,7 +116,7 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
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av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
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use_shm = XShmQueryExtension(dpy);
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av_log(s1, AV_LOG_INFO, "shared memory extension %s\n", use_shm ? "found" : "not found");
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av_log(s1, AV_LOG_INFO, "shared memory extension %s found\n", use_shm ? "" : "not");
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if(use_shm) {
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int scr = XDefaultScreen(dpy);
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@ -142,13 +155,14 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
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input_pixfmt = PIX_FMT_PAL8;
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break;
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case 16:
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if ( image->red_mask == 0xF800 && image->green_mask == 0x07E0
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&& image->blue_mask == 0x1F ) {
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if ( image->red_mask == 0xf800 &&
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image->green_mask == 0x07e0 &&
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image->blue_mask == 0x001f ) {
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av_log (s1, AV_LOG_DEBUG, "16 bit RGB565\n");
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input_pixfmt = PIX_FMT_RGB565;
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} else if ( image->red_mask == 0x7C00 &&
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image->green_mask == 0x03E0 &&
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image->blue_mask == 0x1F ) {
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} else if (image->red_mask == 0x7c00 &&
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image->green_mask == 0x03e0 &&
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image->blue_mask == 0x001f ) {
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av_log(s1, AV_LOG_DEBUG, "16 bit RGB555\n");
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input_pixfmt = PIX_FMT_RGB555;
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} else {
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@ -158,12 +172,13 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
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}
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break;
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case 24:
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if ( image->red_mask == 0xFF0000 &&
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image->green_mask == 0xFF00
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&& image->blue_mask == 0xFF ) {
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if ( image->red_mask == 0xff0000 &&
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image->green_mask == 0x00ff00 &&
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image->blue_mask == 0x0000ff ) {
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input_pixfmt = PIX_FMT_BGR24;
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} else if ( image->red_mask == 0xFF && image->green_mask == 0xFF00
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&& image->blue_mask == 0xFF0000 ) {
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} else if ( image->red_mask == 0x0000ff &&
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image->green_mask == 0x00ff00 &&
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image->blue_mask == 0xff0000 ) {
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input_pixfmt = PIX_FMT_RGB24;
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} else {
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av_log(s1, AV_LOG_ERROR,"rgb ordering at image depth %i not supported ... aborting\n", image->bits_per_pixel);
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@ -174,7 +189,7 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
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case 32:
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#if 0
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GetColorInfo (image, &c_info);
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if ( c_info.alpha_mask == 0xFF000000 && image->green_mask == 0xFF00 ) {
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if ( c_info.alpha_mask == 0xff000000 && image->green_mask == 0x0000ff00) {
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/* byte order is relevant here, not endianness
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* endianness is handled by avcodec, but atm no such thing
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* as having ABGR, instead of ARGB in a word. Since we
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@ -194,41 +209,41 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
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return -1;
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}
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frame_size = width * height * image->bits_per_pixel/8;
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x11grab->frame_size = frame_size;
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x11grab->frame_size = ap->width * ap->height * image->bits_per_pixel/8;
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x11grab->dpy = dpy;
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x11grab->width = ap->width;
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x11grab->height = ap->height;
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x11grab->frame_rate = frame_rate;
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x11grab->frame_rate_base = frame_rate_base;
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x11grab->time_frame = av_gettime() * frame_rate / frame_rate_base;
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x11grab->time_base = ap->time_base;
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x11grab->time_frame = av_gettime() / av_q2d(ap->time_base);
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x11grab->x_off = x_off;
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x11grab->y_off = y_off;
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x11grab->image = image;
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x11grab->use_shm = use_shm;
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x11grab->mouse_wanted = 1;
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st->codec->codec_type = CODEC_TYPE_VIDEO;
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st->codec->codec_id = CODEC_ID_RAWVIDEO;
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st->codec->width = width;
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st->codec->height = height;
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st->codec->width = ap->width;
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st->codec->height = ap->height;
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st->codec->pix_fmt = input_pixfmt;
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st->codec->time_base.den = frame_rate;
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st->codec->time_base.num = frame_rate_base;
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st->codec->bit_rate = frame_size * 1/av_q2d(st->codec->time_base) * 8;
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st->codec->time_base = ap->time_base;
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st->codec->bit_rate = x11grab->frame_size * 1/av_q2d(ap->time_base) * 8;
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return 0;
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fail:
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av_free(st);
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return AVERROR_IO;
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}
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/**
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* Get pointer coordinates from X11.
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*
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* @param x Integer where horizontal coordinate will be returned
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* @param y Integer where vertical coordinate will be returned
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* @param dpy X11 display from where pointer coordinates are retrieved
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* @param s1 Context used for logging errors if necessary
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*/
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static void
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getCurrentPointer(AVFormatContext *s1, X11Grab *s, int *x, int *y)
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get_pointer_coordinates(int *x, int *y, Display *dpy, AVFormatContext *s1)
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{
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Window mrootwindow, childwindow;
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int dummy;
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Display *dpy = s->dpy;
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mrootwindow = DefaultRootWindow(dpy);
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@ -241,6 +256,17 @@ getCurrentPointer(AVFormatContext *s1, X11Grab *s, int *x, int *y)
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}
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}
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/**
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* Mouse painting helper function that applies an 'and' and 'or' mask pair to
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* '*dst' pixel. It actually draws a mouse pointer pixel to grabbed frame.
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*
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* @param dst Destination pixel
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* @param and Part of the mask that must be applied using a bitwise 'and'
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* operator
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* @param or Part of the mask that must be applied using a bitwise 'or'
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* operator
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* @param bits_per_pixel Bits per pixel used in the grabbed image
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*/
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static void inline
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apply_masks(uint8_t *dst, int and, int or, int bits_per_pixel)
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{
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@ -252,28 +278,39 @@ apply_masks(uint8_t *dst, int and, int or, int bits_per_pixel)
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*(uint16_t*)dst = (*(uint16_t*)dst & and) | or;
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break;
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case 8:
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*dst = (or) ? 1 : 0;
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*dst = !!or;
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break;
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}
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}
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/**
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* Paints a mouse pointer in an X11 image.
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*
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* @param image Image where to paint the mouse pointer
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* @param s context used to retrieve original grabbing rectangle
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* coordinates
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* @param x Mouse pointer coordinate
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* @param y Mouse pointer coordinate
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*/
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static void
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paintMousePointer(AVFormatContext *s1, X11Grab *s, int *x, int *y, XImage *image)
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paint_mouse_pointer(XImage *image, x11_grab_t *s, int x, int y)
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{
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/* 16x20x1bpp bitmap for the black channel of the mouse pointer */
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static const uint16_t const mousePointerBlack[] =
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{
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0, 49152, 40960, 36864, 34816,
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33792, 33280, 33024, 32896, 32832,
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33728, 37376, 43264, 51456, 1152,
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1152, 576, 576, 448, 0
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0x0000, 0xc000, 0xa000, 0x9000, 0x8800,
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0x8400, 0x8200, 0x8100, 0x8080, 0x8040,
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0x83c0, 0x9200, 0xa900, 0xc900, 0x0480,
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0x0480, 0x0240, 0x0240, 0x01c0, 0x0000
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};
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/* 16x20x1bpp bitmap for the white channel of the mouse pointer */
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static const uint16_t const mousePointerWhite[] =
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{
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0, 0, 16384, 24576, 28672,
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30720, 31744, 32256, 32512, 32640,
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31744, 27648, 17920, 1536, 768,
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768, 384, 384, 0, 0
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0x0000, 0x0000, 0x4000, 0x6000, 0x7000,
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0x7800, 0x7c00, 0x7e00, 0x7f00, 0x7f80,
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0x7c00, 0x6c00, 0x4600, 0x0600, 0x0300,
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0x0300, 0x0180, 0x0180, 0x0000, 0x0000
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};
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int x_off = s->x_off;
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@ -281,74 +318,40 @@ paintMousePointer(AVFormatContext *s1, X11Grab *s, int *x, int *y, XImage *image
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int width = s->width;
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int height = s->height;
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if ( (*x - x_off) >= 0 && *x < (width + x_off)
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&& (*y - y_off) >= 0 && *y < (height + y_off) ) {
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int line;
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if ( x - x_off >= 0 && x < width + x_off
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&& y - y_off >= 0 && y < height + y_off) {
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uint8_t *im_data = (uint8_t*)image->data;
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const uint16_t *black;
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const uint16_t *white;
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int bytes_per_pixel;
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int line;
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int masks;
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int onepixel;
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/* Select correct pointer pixels */
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if (s->mouse_wanted == 1) {
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/* Normal pointer */
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black = mousePointerBlack;
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white = mousePointerWhite;
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} else {
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/* Inverted pointer */
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black = mousePointerWhite;
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white = mousePointerBlack;
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}
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/* Select correct masks and pixel size */
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switch (image->bits_per_pixel) {
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case 32:
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masks = (image->red_mask|image->green_mask|image->blue_mask);
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onepixel = 4;
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break;
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case 24:
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/* XXX: Though the code seems to support 24bit images, the
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* apply_masks lacks support for 24bit */
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masks = (image->red_mask|image->green_mask|image->blue_mask);
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onepixel = 3;
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break;
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case 16:
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masks = (image->red_mask|image->green_mask|image->blue_mask);
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onepixel = 2;
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break;
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case 8:
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if (image->bits_per_pixel == 8) {
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masks = 1;
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onepixel = 1;
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break;
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default:
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/* Shut up gcc */
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masks = 0;
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onepixel = 0;
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} else {
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masks = (image->red_mask|image->green_mask|image->blue_mask);
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}
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bytes_per_pixel = image->bits_per_pixel>>3;
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/* Shift to right line */
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im_data += (image->bytes_per_line * (*y - y_off));
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/* Shift to right pixel */
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im_data += (image->bits_per_pixel / 8 * (*x - x_off));
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im_data += image->bytes_per_line * (y - y_off);
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/* Shift to right pixel in the line */
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im_data += bytes_per_pixel * (x - x_off);
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/* Draw the cursor - proper loop */
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for (line = 0; line < min(20, (y_off + height) - *y); line++) {
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for (line = 0; line < FFMIN(20, (y_off + height) - y); line++) {
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uint8_t *cursor = im_data;
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int width_cursor;
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int column;
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uint16_t bm_b;
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uint16_t bm_w;
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bm_b = black[line];
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bm_w = white[line];
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bm_b = mousePointerBlack[line];
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bm_w = mousePointerWhite[line];
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for (width_cursor=0;
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width_cursor < 16 && (width_cursor + *x) < (width + x_off);
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width_cursor++) {
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apply_masks(cursor,
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~(masks*(bm_b&1)), masks*(bm_w&1),
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for (column = 0; column < FFMIN(16, (x_off + width) - x); column++) {
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apply_masks(cursor, ~(masks*(bm_b&1)), masks*(bm_w&1),
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image->bits_per_pixel);
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cursor += onepixel;
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cursor += bytes_per_pixel;
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bm_b >>= 1;
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bm_w >>= 1;
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}
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@ -358,19 +361,25 @@ paintMousePointer(AVFormatContext *s1, X11Grab *s, int *x, int *y, XImage *image
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}
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/*
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* just read new data in the image structure, the image
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* structure inclusive the data area must be allocated before
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/**
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* Reads new data in the image structure.
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*
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* @param dpy X11 display to grab from
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* @param d
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* @param image Image where the grab will be put
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* @param x Top-Left grabbing rectangle horizontal coordinate
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* @param y Top-Left grabbing rectangle vertical coordinate
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* @return 0 if error, !0 if successful
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*/
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static int
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XGetZPixmap(Display *dpy, Drawable d, XImage *image, int x, int y)
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xget_zpixmap(Display *dpy, Drawable d, XImage *image, int x, int y)
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{
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xGetImageReply rep;
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xGetImageReq *req;
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long nbytes;
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if (!image) {
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return False;
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return 0;
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}
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LockDisplay(dpy);
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@ -388,7 +397,7 @@ XGetZPixmap(Display *dpy, Drawable d, XImage *image, int x, int y)
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if (!_XReply(dpy, (xReply *)&rep, 0, xFalse) || !rep.length) {
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UnlockDisplay(dpy);
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SyncHandle();
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return False;
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return 0;
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}
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nbytes = (long)rep.length << 2;
|
||||
@ -396,13 +405,20 @@ XGetZPixmap(Display *dpy, Drawable d, XImage *image, int x, int y)
|
||||
|
||||
UnlockDisplay(dpy);
|
||||
SyncHandle();
|
||||
return True;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Grabs a frame from x11 (public device demuxer API).
|
||||
*
|
||||
* @param s1 Context from avformat core
|
||||
* @param pkt Packet holding the brabbed frame
|
||||
* @return frame size in bytes
|
||||
*/
|
||||
static int
|
||||
x11grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
|
||||
{
|
||||
X11Grab *s = s1->priv_data;
|
||||
x11_grab_t *s = s1->priv_data;
|
||||
Display *dpy = s->dpy;
|
||||
XImage *image = s->image;
|
||||
int x_off = s->x_off;
|
||||
@ -417,9 +433,9 @@ x11grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
|
||||
/* wait based on the frame rate */
|
||||
for(;;) {
|
||||
curtime = av_gettime();
|
||||
delay = s->time_frame * s->frame_rate_base / s->frame_rate - curtime;
|
||||
delay = s->time_frame * av_q2d(s->time_base) - curtime;
|
||||
if (delay <= 0) {
|
||||
if (delay < int64_t_C(-1000000) * s->frame_rate_base / s->frame_rate) {
|
||||
if (delay < int64_t_C(-1000000) * av_q2d(s->time_base)) {
|
||||
s->time_frame += int64_t_C(1000000);
|
||||
}
|
||||
break;
|
||||
@ -433,22 +449,22 @@ x11grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
|
||||
return AVERROR_IO;
|
||||
}
|
||||
|
||||
pkt->pts = curtime & ((1LL << 48) - 1);
|
||||
pkt->pts = curtime;
|
||||
|
||||
if(s->use_shm) {
|
||||
if (!XShmGetImage(dpy, RootWindow(dpy, DefaultScreen(dpy)), image, x_off, y_off, AllPlanes)) {
|
||||
av_log (s1, AV_LOG_INFO, "XShmGetImage() failed\n");
|
||||
}
|
||||
} else {
|
||||
if (!XGetZPixmap(dpy, RootWindow(dpy, DefaultScreen(dpy)), image, x_off, y_off)) {
|
||||
if (!xget_zpixmap(dpy, RootWindow(dpy, DefaultScreen(dpy)), image, x_off, y_off)) {
|
||||
av_log (s1, AV_LOG_INFO, "XGetZPixmap() failed\n");
|
||||
}
|
||||
}
|
||||
|
||||
{
|
||||
int pointer_x, pointer_y;
|
||||
getCurrentPointer(s1, s, &pointer_x, &pointer_y);
|
||||
paintMousePointer(s1, s, &pointer_x, &pointer_y, image);
|
||||
get_pointer_coordinates(&pointer_x, &pointer_y, dpy, s1);
|
||||
paint_mouse_pointer(image, s, pointer_x, pointer_y);
|
||||
}
|
||||
|
||||
|
||||
@ -457,10 +473,16 @@ x11grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
|
||||
return s->frame_size;
|
||||
}
|
||||
|
||||
/**
|
||||
* Closes x11 frame grabber (public device demuxer API).
|
||||
*
|
||||
* @param s1 Context from avformat core
|
||||
* @return 0 success, !0 failure
|
||||
*/
|
||||
static int
|
||||
x11grab_read_close(AVFormatContext *s1)
|
||||
{
|
||||
X11Grab *x11grab = s1->priv_data;
|
||||
x11_grab_t *x11grab = s1->priv_data;
|
||||
|
||||
/* Detach cleanly from shared mem */
|
||||
if (x11grab->use_shm) {
|
||||
@ -480,11 +502,12 @@ x11grab_read_close(AVFormatContext *s1)
|
||||
return 0;
|
||||
}
|
||||
|
||||
/** x11 grabber device demuxer declaration */
|
||||
AVInputFormat x11_grab_device_demuxer =
|
||||
{
|
||||
"x11grab",
|
||||
"X11grab",
|
||||
sizeof(X11Grab),
|
||||
sizeof(x11_grab_t),
|
||||
NULL,
|
||||
x11grab_read_header,
|
||||
x11grab_read_packet,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user