0,0 → 1,383 |
/* |
* 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; |
AVCodecContext *encctx = s->streams[0]->codec; |
|
if ( s->nb_streams > 1 |
|| encctx->codec_type != AVMEDIA_TYPE_VIDEO |
|| encctx->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(encctx->pix_fmt))) { |
av_log(s, AV_LOG_ERROR, |
"Unsupported pixel format '%s', only yuv420p, uyvy422, yuyv422 are currently supported\n", |
av_get_pix_fmt_name(encctx->pix_fmt)); |
return AVERROR_PATCHWELCOME; |
} |
xv->image_format = encctx->pix_fmt; |
|
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 = encctx->width; |
xv->image_height = encctx->height; |
if (!xv->window_width && !xv->window_height) { |
AVRational sar = encctx->sample_aspect_ratio; |
xv->window_width = encctx->width; |
xv->window_height = encctx->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(encctx->pix_fmt)); |
ret = AVERROR(EINVAL); |
goto fail; |
} |
|
xv->gc = XCreateGC(xv->display, xv->window, 0, 0); |
xv->image_width = encctx->width; |
xv->image_height = encctx->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]; |
AVCodecContext *encctx = st->codec; |
|
/* 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){ encctx->width, encctx->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, AVPicture *pict) |
{ |
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 **)pict->data, pict->linesize, |
xv->image_format, img->width, img->height); |
return xv_repaint(s); |
} |
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static int xv_write_packet(AVFormatContext *s, AVPacket *pkt) |
{ |
AVPicture pict; |
AVCodecContext *ctx = s->streams[0]->codec; |
|
avpicture_fill(&pict, pkt->data, ctx->pix_fmt, ctx->width, ctx->height); |
return write_picture(s, &pict); |
} |
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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, (AVPicture *)*frame); |
} |
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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, |
}; |