From b2a6f25c67cca644257f008c8de83e4939f87196 Mon Sep 17 00:00:00 2001 From: Stefano Sabatini Date: Fri, 27 May 2011 01:34:35 +0200 Subject: [PATCH] lavdev: add SDL output device --- Changelog | 1 + configure | 2 + doc/outdevs.texi | 43 ++++++++ libavdevice/Makefile | 1 + libavdevice/alldevices.c | 1 + libavdevice/avdevice.h | 2 +- libavdevice/sdl.c | 228 +++++++++++++++++++++++++++++++++++++++ 7 files changed, 277 insertions(+), 1 deletion(-) create mode 100644 libavdevice/sdl.c diff --git a/Changelog b/Changelog index c5bec6a53b..37ccd06106 100644 --- a/Changelog +++ b/Changelog @@ -19,6 +19,7 @@ version : - 9bit and 10bit FFV1 encoding / decoding - split filter added - select filter added +- sdl output device added version 0.7_beta1: diff --git a/configure b/configure index 5f80ec5063..2c4f2e81e1 100755 --- a/configure +++ b/configure @@ -1471,6 +1471,7 @@ jack_indev_deps="jack_jack_h sem_timedwait" libdc1394_indev_deps="libdc1394" oss_indev_deps_any="soundcard_h sys_soundcard_h" oss_outdev_deps_any="soundcard_h sys_soundcard_h" +sdl_outdev_deps="sdl" sndio_indev_deps="sndio_h" sndio_outdev_deps="sndio_h" v4l_indev_deps="linux_videodev_h" @@ -2959,6 +2960,7 @@ else check_struct SDL.h SDL_VideoInfo current_w $sdl_cflags && enable sdl_video_size fi fi +enabled sdl && add_cflags $sdl_cflags && add_extralibs $sdl_libs texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html diff --git a/doc/outdevs.texi b/doc/outdevs.texi index fbb312363c..9985900afc 100644 --- a/doc/outdevs.texi +++ b/doc/outdevs.texi @@ -26,6 +26,49 @@ ALSA (Advanced Linux Sound Architecture) output device. OSS (Open Sound System) output device. +@section sdl + +SDL (Simple Directmedia Layer) output device. + +This output devices allows to show a video stream in an SDL +window. Only one SDL window is allowed per application, so you can +have only one instance of this output device in an application. + +To enable this output device you need libsdl installed on your system +when configuring your build. + +For more information about SDL, check: +@url{http://www.libsdl.org/} + +@subsection Options + +@table @option + +@item window_title +Set the SDL window title, if not specified default to "SDL video +outdev". + +@item icon_title +Set the name of the iconified SDL window, if not specified it is set +to the same value of @var{window_title}. + +@item window_size +Set the SDL window size, can be a string of the form +@var{width}x@var{height} or a video size abbreviation. +If not specified it defaults to the size of the input video. +@end table + +@subsection Examples + +The following command shows the @file{ffmpeg} output is an +SDL window, forcing its size to the qcif format: +@example +ffmpeg -i INPUT -vcodec rawvideo -pix_fmt yuv420p -window_size qcif -f sdl none +@end example + +Note that the name specified for the output device is ignored, so it +can be set to an arbitrary value ("none" in the above example). + @section sndio sndio audio output device. diff --git a/libavdevice/Makefile b/libavdevice/Makefile index 4bcb5a3ae6..60103a4864 100644 --- a/libavdevice/Makefile +++ b/libavdevice/Makefile @@ -21,6 +21,7 @@ OBJS-$(CONFIG_FBDEV_INDEV) += fbdev.o OBJS-$(CONFIG_JACK_INDEV) += jack_audio.o OBJS-$(CONFIG_OSS_INDEV) += oss_audio.o OBJS-$(CONFIG_OSS_OUTDEV) += oss_audio.o +OBJS-$(CONFIG_SDL_OUTDEV) += sdl.o OBJS-$(CONFIG_SNDIO_INDEV) += sndio_common.o sndio_dec.o OBJS-$(CONFIG_SNDIO_OUTDEV) += sndio_common.o sndio_enc.o OBJS-$(CONFIG_V4L2_INDEV) += v4l2.o diff --git a/libavdevice/alldevices.c b/libavdevice/alldevices.c index 3021f08bda..7846704861 100644 --- a/libavdevice/alldevices.c +++ b/libavdevice/alldevices.c @@ -45,6 +45,7 @@ void avdevice_register_all(void) REGISTER_INDEV (FBDEV, fbdev); REGISTER_INDEV (JACK, jack); REGISTER_INOUTDEV (OSS, oss); + REGISTER_OUTDEV (SDL, sdl); REGISTER_INOUTDEV (SNDIO, sndio); REGISTER_INDEV (V4L2, v4l2); #if FF_API_V4L diff --git a/libavdevice/avdevice.h b/libavdevice/avdevice.h index a31c080f9c..be56be48d7 100644 --- a/libavdevice/avdevice.h +++ b/libavdevice/avdevice.h @@ -23,7 +23,7 @@ #include "libavformat/avformat.h" #define LIBAVDEVICE_VERSION_MAJOR 53 -#define LIBAVDEVICE_VERSION_MINOR 0 +#define LIBAVDEVICE_VERSION_MINOR 1 #define LIBAVDEVICE_VERSION_MICRO 0 #define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \ diff --git a/libavdevice/sdl.c b/libavdevice/sdl.c new file mode 100644 index 0000000000..07f60cd648 --- /dev/null +++ b/libavdevice/sdl.c @@ -0,0 +1,228 @@ +/* + * Copyright (c) 2011 Stefano Sabatini + * + * 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 + * libSDL output device + */ + +#include +#include "libavutil/avstring.h" +#include "libavutil/opt.h" +#include "libavutil/parseutils.h" +#include "libavutil/pixdesc.h" +#include "avdevice.h" + +typedef struct { + AVClass *class; + SDL_Surface *surface; + SDL_Overlay *overlay; + char *window_title; + char *icon_title; + char *window_size; + int window_width, window_height; + int overlay_width, overlay_height; + int overlay_fmt; + int sdl_was_already_inited; +} SDLContext; + +struct sdl_overlay_pix_fmt_entry { + enum PixelFormat pix_fmt; int overlay_fmt; +} sdl_overlay_pix_fmt_map[] = { + { PIX_FMT_YUV420P, SDL_IYUV_OVERLAY }, + { PIX_FMT_YUYV422, SDL_YUY2_OVERLAY }, + { PIX_FMT_UYVY422, SDL_UYVY_OVERLAY }, + { PIX_FMT_NONE, 0 }, +}; + +static int sdl_write_trailer(AVFormatContext *s) +{ + SDLContext *sdl = s->priv_data; + + av_freep(&sdl->window_title); + av_freep(&sdl->icon_title); + av_freep(&sdl->window_size); + + if (sdl->overlay) { + SDL_FreeYUVOverlay(sdl->overlay); + sdl->overlay = NULL; + } + if (!sdl->sdl_was_already_inited) + SDL_Quit(); + + return 0; +} + +static int sdl_write_header(AVFormatContext *s) +{ + SDLContext *sdl = s->priv_data; + AVStream *st = s->streams[0]; + AVCodecContext *encctx = st->codec; + float sar, dar; /* sample and display aspect ratios */ + int i, ret; + + if (!sdl->icon_title) + sdl->icon_title = av_strdup(sdl->window_title); + + if (SDL_WasInit(SDL_INIT_VIDEO)) { + av_log(s, AV_LOG_ERROR, + "SDL video subsystem was already inited, aborting.\n"); + sdl->sdl_was_already_inited = 1; + ret = AVERROR(EINVAL); + goto fail; + } + + if (SDL_Init(SDL_INIT_VIDEO) != 0) { + av_log(s, AV_LOG_ERROR, "Unable to initialize SDL: %s\n", SDL_GetError()); + ret = AVERROR(EINVAL); + goto fail; + } + + if ( s->nb_streams > 1 + || encctx->codec_type != AVMEDIA_TYPE_VIDEO + || encctx->codec_id != CODEC_ID_RAWVIDEO) { + av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n"); + ret = AVERROR(EINVAL); + goto fail; + } + + for (i = 0; sdl_overlay_pix_fmt_map[i].pix_fmt != PIX_FMT_NONE; i++) { + if (sdl_overlay_pix_fmt_map[i].pix_fmt == encctx->pix_fmt) { + sdl->overlay_fmt = sdl_overlay_pix_fmt_map[i].overlay_fmt; + break; + } + } + + if (!sdl->overlay_fmt) { + av_log(s, AV_LOG_ERROR, + "Unsupported pixel format '%s', choose one of yuv420p, yuyv422, or uyvy422.\n", + av_get_pix_fmt_name(encctx->pix_fmt)); + ret = AVERROR(EINVAL); + goto fail; + } + + if (sdl->window_size) { + if (av_parse_video_size(&sdl->window_width, &sdl->window_height, + sdl->window_size) < 0) { + av_log(s, AV_LOG_ERROR, "Invalid window size '%s'\n", sdl->window_size); + ret = AVERROR(EINVAL); + goto fail; + } + } + + /* compute overlay width and height from the codec context information */ + sar = st->sample_aspect_ratio.num ? av_q2d(st->sample_aspect_ratio) : 1; + dar = sar * (float)encctx->width / (float)encctx->height; + + /* we suppose the screen has a 1/1 sample aspect ratio */ + sdl->overlay_height = encctx->height; + sdl->overlay_width = ((int)rint(sdl->overlay_height * dar)); + if (sdl->overlay_width > encctx->width) { + sdl->overlay_width = encctx->width; + sdl->overlay_height = ((int)rint(sdl->overlay_width / dar)); + } + + if (!sdl->window_width || !sdl->window_height) { + sdl->window_width = sdl->overlay_width; + sdl->window_height = sdl->overlay_height; + } + + SDL_WM_SetCaption(sdl->window_title, sdl->icon_title); + sdl->surface = SDL_SetVideoMode(sdl->window_width, sdl->window_height, + 24, SDL_SWSURFACE); + if (!sdl->surface) { + av_log(s, AV_LOG_ERROR, "Unable to set video mode: %s\n", SDL_GetError()); + ret = AVERROR(EINVAL); + goto fail; + } + + sdl->overlay = SDL_CreateYUVOverlay(sdl->overlay_width, sdl->overlay_height, + sdl->overlay_fmt, sdl->surface); + if (!sdl->overlay || sdl->overlay->pitches[0] < sdl->overlay_width) { + av_log(s, AV_LOG_ERROR, + "SDL does not support an overlay with size of %dx%d pixels.\n", + sdl->overlay_width, sdl->overlay_height); + ret = AVERROR(EINVAL); + goto fail; + } + + av_log(s, AV_LOG_INFO, "w:%d h:%d fmt:%s sar:%f -> w:%d h:%d\n", + encctx->width, encctx->height, av_get_pix_fmt_name(encctx->pix_fmt), sar, + sdl->window_width, sdl->window_height); + return 0; + +fail: + sdl_write_trailer(s); + return ret; +} + +static int sdl_write_packet(AVFormatContext *s, AVPacket *pkt) +{ + SDLContext *sdl = s->priv_data; + AVCodecContext *encctx = s->streams[0]->codec; + SDL_Rect rect = { 0, 0, sdl->window_width, sdl->window_height }; + AVPicture pict; + int i; + + avpicture_fill(&pict, pkt->data, encctx->pix_fmt, encctx->width, encctx->height); + + SDL_FillRect(sdl->surface, &sdl->surface->clip_rect, + SDL_MapRGB(sdl->surface->format, 0, 0, 0)); + SDL_LockYUVOverlay(sdl->overlay); + for (i = 0; i < 3; i++) { + sdl->overlay->pixels [i] = pict.data [i]; + sdl->overlay->pitches[i] = pict.linesize[i]; + } + SDL_DisplayYUVOverlay(sdl->overlay, &rect); + SDL_UnlockYUVOverlay(sdl->overlay); + + SDL_UpdateRect(sdl->surface, 0, 0, sdl->overlay_width, sdl->overlay_height); + + return 0; +} + +#define OFFSET(x) offsetof(SDLContext,x) + +static const AVOption options[] = { + { "window_title", "SDL window title", OFFSET(window_title), FF_OPT_TYPE_STRING, {.str = "SDL video outdev" }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, + { "icon_title", "SDL iconified window title", OFFSET(icon_title) , FF_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, + { "window_size", "SDL window forced size", OFFSET(window_size) , FF_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, + { NULL }, +}; + +static const AVClass sdl_class = { + .class_name = "sdl outdev", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; + +AVOutputFormat ff_sdl_muxer = { + .name = "sdl", + .long_name = NULL_IF_CONFIG_SMALL("SDL output device"), + .priv_data_size = sizeof(SDLContext), + .audio_codec = CODEC_ID_NONE, + .video_codec = CODEC_ID_RAWVIDEO, + .write_header = sdl_write_header, + .write_packet = sdl_write_packet, + .write_trailer = sdl_write_trailer, + .flags = AVFMT_NOFILE, + .priv_class = &sdl_class, +};