diff options
Diffstat (limited to 'libavdevice/xv.c')
-rw-r--r-- | libavdevice/xv.c | 383 |
1 files changed, 383 insertions, 0 deletions
diff --git a/libavdevice/xv.c b/libavdevice/xv.c new file mode 100644 index 0000000..c19c15c --- /dev/null +++ b/libavdevice/xv.c @@ -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); +} + +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); +} + +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); +} + +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, +}; |