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-rw-r--r--libavdevice/xv.c386
1 files changed, 386 insertions, 0 deletions
diff --git a/libavdevice/xv.c b/libavdevice/xv.c
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--- /dev/null
+++ b/libavdevice/xv.c
@@ -0,0 +1,386 @@
+/*
+ * Copyright (c) 2013 Jeff Moguillansky
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * XVideo output device
+ *
+ * TODO:
+ * - add support to more formats
+ */
+
+#include <X11/Xlib.h>
+#include <X11/extensions/Xv.h>
+#include <X11/extensions/XShm.h>
+#include <X11/extensions/Xvlib.h>
+#include <sys/shm.h>
+
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/imgutils.h"
+#include "libavformat/internal.h"
+#include "avdevice.h"
+
+typedef struct {
+ AVClass *class;
+ GC gc;
+
+ Window window;
+ int64_t window_id;
+ char *window_title;
+ int window_width, window_height;
+ int window_x, window_y;
+ int dest_x, dest_y; /**< display area position */
+ unsigned int dest_w, dest_h; /**< display area dimensions */
+
+ Display* display;
+ char *display_name;
+
+ XvImage* yuv_image;
+ enum AVPixelFormat image_format;
+ int image_width, image_height;
+ XShmSegmentInfo yuv_shminfo;
+ int xv_port;
+ Atom wm_delete_message;
+} XVContext;
+
+typedef struct XVTagFormatMap
+{
+ int tag;
+ enum AVPixelFormat format;
+} XVTagFormatMap;
+
+static const XVTagFormatMap tag_codec_map[] = {
+ { MKTAG('I','4','2','0'), AV_PIX_FMT_YUV420P },
+ { MKTAG('U','Y','V','Y'), AV_PIX_FMT_UYVY422 },
+ { MKTAG('Y','U','Y','2'), AV_PIX_FMT_YUYV422 },
+ { 0, AV_PIX_FMT_NONE }
+};
+
+static int xv_get_tag_from_format(enum AVPixelFormat format)
+{
+ const XVTagFormatMap *m = tag_codec_map;
+ int i;
+ for (i = 0; m->tag; m = &tag_codec_map[++i]) {
+ if (m->format == format)
+ return m->tag;
+ }
+ return 0;
+}
+
+static int xv_write_trailer(AVFormatContext *s)
+{
+ XVContext *xv = s->priv_data;
+ if (xv->display) {
+ XShmDetach(xv->display, &xv->yuv_shminfo);
+ if (xv->yuv_image)
+ shmdt(xv->yuv_image->data);
+ XFree(xv->yuv_image);
+ if (xv->gc)
+ XFreeGC(xv->display, xv->gc);
+ XCloseDisplay(xv->display);
+ }
+ return 0;
+}
+
+static int xv_write_header(AVFormatContext *s)
+{
+ XVContext *xv = s->priv_data;
+ unsigned int num_adaptors;
+ XvAdaptorInfo *ai;
+ XvImageFormatValues *fv;
+ XColor fgcolor;
+ XWindowAttributes window_attrs;
+ int num_formats = 0, j, tag, ret;
+ AVCodecParameters *par = s->streams[0]->codecpar;
+
+ if ( s->nb_streams > 1
+ || par->codec_type != AVMEDIA_TYPE_VIDEO
+ || par->codec_id != AV_CODEC_ID_RAWVIDEO) {
+ av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n");
+ return AVERROR(EINVAL);
+ }
+
+ if (!(tag = xv_get_tag_from_format(par->format))) {
+ av_log(s, AV_LOG_ERROR,
+ "Unsupported pixel format '%s', only yuv420p, uyvy422, yuyv422 are currently supported\n",
+ av_get_pix_fmt_name(par->format));
+ return AVERROR_PATCHWELCOME;
+ }
+ xv->image_format = par->format;
+
+ xv->display = XOpenDisplay(xv->display_name);
+ if (!xv->display) {
+ av_log(s, AV_LOG_ERROR, "Could not open the X11 display '%s'\n", xv->display_name);
+ return AVERROR(EINVAL);
+ }
+
+ xv->image_width = par->width;
+ xv->image_height = par->height;
+ if (!xv->window_width && !xv->window_height) {
+ AVRational sar = par->sample_aspect_ratio;
+ xv->window_width = par->width;
+ xv->window_height = par->height;
+ if (sar.num) {
+ if (sar.num > sar.den)
+ xv->window_width = av_rescale(xv->window_width, sar.num, sar.den);
+ if (sar.num < sar.den)
+ xv->window_height = av_rescale(xv->window_height, sar.den, sar.num);
+ }
+ }
+ if (!xv->window_id) {
+ xv->window = XCreateSimpleWindow(xv->display, DefaultRootWindow(xv->display),
+ xv->window_x, xv->window_y,
+ xv->window_width, xv->window_height,
+ 0, 0, 0);
+ if (!xv->window_title) {
+ if (!(xv->window_title = av_strdup(s->filename))) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ }
+ XStoreName(xv->display, xv->window, xv->window_title);
+ xv->wm_delete_message = XInternAtom(xv->display, "WM_DELETE_WINDOW", False);
+ XSetWMProtocols(xv->display, xv->window, &xv->wm_delete_message, 1);
+ XMapWindow(xv->display, xv->window);
+ } else
+ xv->window = xv->window_id;
+
+ if (XvQueryAdaptors(xv->display, DefaultRootWindow(xv->display), &num_adaptors, &ai) != Success) {
+ ret = AVERROR_EXTERNAL;
+ goto fail;
+ }
+ if (!num_adaptors) {
+ av_log(s, AV_LOG_ERROR, "No X-Video adaptors present\n");
+ return AVERROR(ENODEV);
+ }
+ xv->xv_port = ai[0].base_id;
+ XvFreeAdaptorInfo(ai);
+
+ fv = XvListImageFormats(xv->display, xv->xv_port, &num_formats);
+ if (!fv) {
+ ret = AVERROR_EXTERNAL;
+ goto fail;
+ }
+ for (j = 0; j < num_formats; j++) {
+ if (fv[j].id == tag) {
+ break;
+ }
+ }
+ XFree(fv);
+
+ if (j >= num_formats) {
+ av_log(s, AV_LOG_ERROR,
+ "Device does not support pixel format %s, aborting\n",
+ av_get_pix_fmt_name(par->format));
+ ret = AVERROR(EINVAL);
+ goto fail;
+ }
+
+ xv->gc = XCreateGC(xv->display, xv->window, 0, 0);
+ xv->image_width = par->width;
+ xv->image_height = par->height;
+ xv->yuv_image = XvShmCreateImage(xv->display, xv->xv_port, tag, 0,
+ xv->image_width, xv->image_height, &xv->yuv_shminfo);
+ xv->yuv_shminfo.shmid = shmget(IPC_PRIVATE, xv->yuv_image->data_size,
+ IPC_CREAT | 0777);
+ xv->yuv_shminfo.shmaddr = (char *)shmat(xv->yuv_shminfo.shmid, 0, 0);
+ xv->yuv_image->data = xv->yuv_shminfo.shmaddr;
+ xv->yuv_shminfo.readOnly = False;
+
+ XShmAttach(xv->display, &xv->yuv_shminfo);
+ XSync(xv->display, False);
+ shmctl(xv->yuv_shminfo.shmid, IPC_RMID, 0);
+
+ XGetWindowAttributes(xv->display, xv->window, &window_attrs);
+ fgcolor.red = fgcolor.green = fgcolor.blue = 0;
+ fgcolor.flags = DoRed | DoGreen | DoBlue;
+ XAllocColor(xv->display, window_attrs.colormap, &fgcolor);
+ XSetForeground(xv->display, xv->gc, fgcolor.pixel);
+ //force display area recalculation at first frame
+ xv->window_width = xv->window_height = 0;
+
+ return 0;
+ fail:
+ xv_write_trailer(s);
+ return ret;
+}
+
+static void compute_display_area(AVFormatContext *s)
+{
+ XVContext *xv = s->priv_data;
+ AVRational sar, dar; /* sample and display aspect ratios */
+ AVStream *st = s->streams[0];
+ AVCodecParameters *par = st->codecpar;
+
+ /* compute overlay width and height from the codec context information */
+ sar = st->sample_aspect_ratio.num ? st->sample_aspect_ratio : (AVRational){ 1, 1 };
+ dar = av_mul_q(sar, (AVRational){ par->width, par->height });
+
+ /* we suppose the screen has a 1/1 sample aspect ratio */
+ /* fit in the window */
+ if (av_cmp_q(dar, (AVRational){ xv->dest_w, xv->dest_h }) > 0) {
+ /* fit in width */
+ xv->dest_y = xv->dest_h;
+ xv->dest_x = 0;
+ xv->dest_h = av_rescale(xv->dest_w, dar.den, dar.num);
+ xv->dest_y -= xv->dest_h;
+ xv->dest_y /= 2;
+ } else {
+ /* fit in height */
+ xv->dest_x = xv->dest_w;
+ xv->dest_y = 0;
+ xv->dest_w = av_rescale(xv->dest_h, dar.num, dar.den);
+ xv->dest_x -= xv->dest_w;
+ xv->dest_x /= 2;
+ }
+}
+
+static int xv_repaint(AVFormatContext *s)
+{
+ XVContext *xv = s->priv_data;
+ XWindowAttributes window_attrs;
+
+ XGetWindowAttributes(xv->display, xv->window, &window_attrs);
+ if (window_attrs.width != xv->window_width || window_attrs.height != xv->window_height) {
+ XRectangle rect[2];
+ xv->dest_w = window_attrs.width;
+ xv->dest_h = window_attrs.height;
+ compute_display_area(s);
+ if (xv->dest_x) {
+ rect[0].width = rect[1].width = xv->dest_x;
+ rect[0].height = rect[1].height = window_attrs.height;
+ rect[0].y = rect[1].y = 0;
+ rect[0].x = 0;
+ rect[1].x = xv->dest_w + xv->dest_x;
+ XFillRectangles(xv->display, xv->window, xv->gc, rect, 2);
+ }
+ if (xv->dest_y) {
+ rect[0].width = rect[1].width = window_attrs.width;
+ rect[0].height = rect[1].height = xv->dest_y;
+ rect[0].x = rect[1].x = 0;
+ rect[0].y = 0;
+ rect[1].y = xv->dest_h + xv->dest_y;
+ XFillRectangles(xv->display, xv->window, xv->gc, rect, 2);
+ }
+ }
+
+ if (XvShmPutImage(xv->display, xv->xv_port, xv->window, xv->gc,
+ xv->yuv_image, 0, 0, xv->image_width, xv->image_height,
+ xv->dest_x, xv->dest_y, xv->dest_w, xv->dest_h, True) != Success) {
+ av_log(s, AV_LOG_ERROR, "Could not copy image to XV shared memory buffer\n");
+ return AVERROR_EXTERNAL;
+ }
+ return 0;
+}
+
+static int write_picture(AVFormatContext *s, uint8_t *input_data[4],
+ int linesize[4])
+{
+ XVContext *xv = s->priv_data;
+ XvImage *img = xv->yuv_image;
+ uint8_t *data[3] = {
+ img->data + img->offsets[0],
+ img->data + img->offsets[1],
+ img->data + img->offsets[2]
+ };
+
+ /* Check messages. Window might get closed. */
+ if (!xv->window_id) {
+ XEvent event;
+ while (XPending(xv->display)) {
+ XNextEvent(xv->display, &event);
+ if (event.type == ClientMessage && event.xclient.data.l[0] == xv->wm_delete_message) {
+ av_log(xv, AV_LOG_DEBUG, "Window close event.\n");
+ return AVERROR(EPIPE);
+ }
+ }
+ }
+
+ av_image_copy(data, img->pitches, (const uint8_t **)input_data, linesize,
+ xv->image_format, img->width, img->height);
+ return xv_repaint(s);
+}
+
+static int xv_write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ AVCodecParameters *par = s->streams[0]->codecpar;
+ uint8_t *data[4];
+ int linesize[4];
+
+ av_image_fill_arrays(data, linesize, pkt->data, par->format,
+ par->width, par->height, 1);
+ return write_picture(s, data, linesize);
+}
+
+static int xv_write_frame(AVFormatContext *s, int stream_index, AVFrame **frame,
+ unsigned flags)
+{
+ /* xv_write_header() should have accepted only supported formats */
+ if ((flags & AV_WRITE_UNCODED_FRAME_QUERY))
+ return 0;
+ return write_picture(s, (*frame)->data, (*frame)->linesize);
+}
+
+static int xv_control_message(AVFormatContext *s, int type, void *data, size_t data_size)
+{
+ switch(type) {
+ case AV_APP_TO_DEV_WINDOW_REPAINT:
+ return xv_repaint(s);
+ default:
+ break;
+ }
+ return AVERROR(ENOSYS);
+}
+
+#define OFFSET(x) offsetof(XVContext, x)
+static const AVOption options[] = {
+ { "display_name", "set display name", OFFSET(display_name), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
+ { "window_id", "set existing window id", OFFSET(window_id), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+ { "window_size", "set window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
+ { "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
+ { "window_x", "set window x offset", OFFSET(window_x), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+ { "window_y", "set window y offset", OFFSET(window_y), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+ { NULL }
+
+};
+
+static const AVClass xv_class = {
+ .class_name = "xvideo outdev",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+ .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT,
+};
+
+AVOutputFormat ff_xv_muxer = {
+ .name = "xv",
+ .long_name = NULL_IF_CONFIG_SMALL("XV (XVideo) output device"),
+ .priv_data_size = sizeof(XVContext),
+ .audio_codec = AV_CODEC_ID_NONE,
+ .video_codec = AV_CODEC_ID_RAWVIDEO,
+ .write_header = xv_write_header,
+ .write_packet = xv_write_packet,
+ .write_uncoded_frame = xv_write_frame,
+ .write_trailer = xv_write_trailer,
+ .control_message = xv_control_message,
+ .flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS,
+ .priv_class = &xv_class,
+};
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