mirror of https://github.com/FFmpeg/FFmpeg.git
Acked-by: Michael Niedermayer Signed-off-by: Josh de Kock <josh@itanimul.li>pull/231/head
Josh de Kock
9 years ago
parent
c29b532a94
commit
3877e3d8a8
5 changed files with 407 additions and 1 deletions
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/*
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* Copyright (c) 2016 Josh de Kock |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file |
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* libSDL2 output device |
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*/ |
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#include <SDL.h> |
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#include <SDL_thread.h> |
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#include "libavutil/avstring.h" |
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#include "libavutil/imgutils.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/parseutils.h" |
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#include "libavutil/pixdesc.h" |
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#include "libavutil/time.h" |
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#include "avdevice.h" |
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typedef struct { |
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AVClass *class; |
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SDL_Window *window; |
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SDL_Renderer *renderer; |
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char *window_title; |
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int window_width, window_height; /**< size of the window */ |
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int window_fullscreen; |
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int window_borderless; |
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SDL_Texture *texture; |
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int texture_fmt; |
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SDL_Rect texture_rect; |
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int inited; |
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SDL_Thread *event_thread; |
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SDL_mutex *mutex; |
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SDL_cond *init_cond; |
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int quit; |
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} SDLContext; |
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static const struct sdl_texture_format_entry { |
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enum AVPixelFormat format; int texture_fmt; |
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} sdl_texture_format_map[] = { |
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/*
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* Not implemented in FFmpeg, but leaving here for completeness. |
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* { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_ARGB4444 }, |
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* { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_RGBA4444 }, |
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* { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_ABGR4444 }, |
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* { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_BGRA4444 }, |
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* { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_ARGB1555 }, |
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* { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_RGBA5551 }, |
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* { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_ABGR1555 }, |
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* { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_BGRA5551 }, |
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* { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_ARGB2101010 }, |
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*/ |
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{ AV_PIX_FMT_RGB8, SDL_PIXELFORMAT_RGB332 }, |
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{ AV_PIX_FMT_RGB444, SDL_PIXELFORMAT_RGB444 }, |
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{ AV_PIX_FMT_RGB555, SDL_PIXELFORMAT_RGB555 }, |
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{ AV_PIX_FMT_BGR555, SDL_PIXELFORMAT_BGR555 }, |
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{ AV_PIX_FMT_RGB565, SDL_PIXELFORMAT_RGB565 }, |
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{ AV_PIX_FMT_BGR565, SDL_PIXELFORMAT_BGR565 }, |
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{ AV_PIX_FMT_RGB24, SDL_PIXELFORMAT_RGB24 }, |
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{ AV_PIX_FMT_BGR24, SDL_PIXELFORMAT_BGR24 }, |
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{ AV_PIX_FMT_RGB24, SDL_PIXELFORMAT_RGB888 }, |
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{ AV_PIX_FMT_BGR24, SDL_PIXELFORMAT_BGR888 }, |
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{ AV_PIX_FMT_RGB0, SDL_PIXELFORMAT_RGBX8888 }, // needs to be checked
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{ AV_PIX_FMT_BGR0, SDL_PIXELFORMAT_BGRX8888 }, // "
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{ AV_PIX_FMT_ARGB, SDL_PIXELFORMAT_ARGB8888 }, // "
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{ AV_PIX_FMT_RGBA, SDL_PIXELFORMAT_RGBA8888 }, |
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{ AV_PIX_FMT_ABGR, SDL_PIXELFORMAT_ABGR8888 }, |
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{ AV_PIX_FMT_BGRA, SDL_PIXELFORMAT_BGRA8888 }, |
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{ AV_PIX_FMT_YUV420P, SDL_PIXELFORMAT_IYUV }, |
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{ AV_PIX_FMT_YUYV422, SDL_PIXELFORMAT_YUY2 }, |
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{ AV_PIX_FMT_UYVY422, SDL_PIXELFORMAT_UYVY }, |
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{ AV_PIX_FMT_NONE, 0 }, |
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}; |
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static void compute_texture_rect(AVFormatContext *s) |
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{ |
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AVRational sar, dar; /* sample and display aspect ratios */ |
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SDLContext *sdl = s->priv_data; |
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AVStream *st = s->streams[0]; |
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AVCodecParameters *codecpar = st->codecpar; |
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SDL_Rect *texture_rect = &sdl->texture_rect; |
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/* compute texture width and height from the codec context information */ |
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sar = st->sample_aspect_ratio.num ? st->sample_aspect_ratio : (AVRational){ 1, 1 }; |
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dar = av_mul_q(sar, (AVRational){ codecpar->width, codecpar->height }); |
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/* we suppose the screen has a 1/1 sample aspect ratio */ |
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if (sdl->window_width && sdl->window_height) { |
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/* fit in the window */ |
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if (av_cmp_q(dar, (AVRational){ sdl->window_width, sdl->window_height }) > 0) { |
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/* fit in width */ |
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texture_rect->w = sdl->window_width; |
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texture_rect->h = av_rescale(texture_rect->w, dar.den, dar.num); |
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} else { |
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/* fit in height */ |
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texture_rect->h = sdl->window_height; |
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texture_rect->w = av_rescale(texture_rect->h, dar.num, dar.den); |
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} |
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} else { |
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if (sar.num > sar.den) { |
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texture_rect->w = codecpar->width; |
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texture_rect->h = av_rescale(texture_rect->w, dar.den, dar.num); |
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} else { |
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texture_rect->h = codecpar->height; |
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texture_rect->w = av_rescale(texture_rect->h, dar.num, dar.den); |
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} |
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sdl->window_width = texture_rect->w; |
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sdl->window_height = texture_rect->h; |
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} |
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texture_rect->x = (sdl->window_width - texture_rect->w) / 2; |
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texture_rect->y = (sdl->window_height - texture_rect->h) / 2; |
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} |
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static int sdl2_write_trailer(AVFormatContext *s) |
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{ |
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SDLContext *sdl = s->priv_data; |
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sdl->quit = 1; |
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if (sdl->texture) |
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SDL_DestroyTexture(sdl->texture); |
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sdl->texture = NULL; |
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if (sdl->event_thread) |
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SDL_WaitThread(sdl->event_thread, NULL); |
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sdl->event_thread = NULL; |
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if (sdl->mutex) |
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SDL_DestroyMutex(sdl->mutex); |
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sdl->mutex = NULL; |
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if (sdl->init_cond) |
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SDL_DestroyCond(sdl->init_cond); |
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sdl->init_cond = NULL; |
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if (sdl->renderer) |
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SDL_DestroyRenderer(sdl->renderer); |
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sdl->renderer = NULL; |
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if (sdl->window) |
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SDL_DestroyWindow(sdl->window); |
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sdl->window = NULL; |
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if (!sdl->inited) |
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SDL_Quit(); |
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return 0; |
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} |
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#define SDL_BASE_FLAGS (SDL_SWSURFACE|SDL_WINDOW_RESIZABLE) |
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static int sdl2_write_header(AVFormatContext *s) |
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{ |
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SDLContext *sdl = s->priv_data; |
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AVStream *st = s->streams[0]; |
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AVCodecParameters *codecpar = st->codecpar; |
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int i, ret = 0; |
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int flags = 0; |
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if (!sdl->window_title) |
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sdl->window_title = av_strdup(s->filename); |
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if (SDL_WasInit(SDL_INIT_VIDEO)) { |
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av_log(s, AV_LOG_WARNING, |
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"SDL video subsystem was already inited, you could have multiple SDL outputs. This may cause unknown behaviour.\n"); |
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sdl->inited = 1; |
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} |
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if ( s->nb_streams > 1 |
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|| codecpar->codec_type != AVMEDIA_TYPE_VIDEO |
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|| codecpar->codec_id != AV_CODEC_ID_RAWVIDEO) { |
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av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n"); |
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goto fail; |
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} |
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for (i = 0; sdl_texture_format_map[i].format != AV_PIX_FMT_NONE; i++) { |
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if (sdl_texture_format_map[i].format == codecpar->format) { |
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sdl->texture_fmt = sdl_texture_format_map[i].texture_fmt; |
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break; |
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} |
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} |
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if (!sdl->texture_fmt) { |
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av_log(s, AV_LOG_ERROR, |
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"Unsupported pixel format '%s', choose one of yuv420p, yuyv422, uyvy422, BGRA\n", |
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av_get_pix_fmt_name(codecpar->format)); |
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goto fail; |
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} |
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/* resize texture to width and height from the codec context information */ |
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flags = SDL_BASE_FLAGS | (sdl->window_fullscreen ? SDL_WINDOW_FULLSCREEN : 0) | |
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(sdl->window_borderless ? SDL_WINDOW_BORDERLESS : 0); |
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/* initialization */ |
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if (!sdl->inited){ |
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if (SDL_Init(SDL_INIT_VIDEO) != 0) { |
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av_log(s, AV_LOG_ERROR, "Unable to initialize SDL: %s\n", SDL_GetError()); |
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goto fail; |
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} |
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} |
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sdl->window_width = sdl->texture_rect.w = codecpar->width; |
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sdl->window_height = sdl->texture_rect.h = codecpar->height; |
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sdl->texture_rect.x = sdl->texture_rect.y = 0; |
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if (SDL_CreateWindowAndRenderer(sdl->window_width, sdl->window_height, |
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flags, &sdl->window, &sdl->renderer) != 0){ |
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av_log(sdl, AV_LOG_ERROR, "Couldn't create window and renderer: %s\n", SDL_GetError()); |
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goto fail; |
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} |
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SDL_SetWindowTitle(sdl->window, sdl->window_title); |
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sdl->texture = SDL_CreateTexture(sdl->renderer, sdl->texture_fmt, SDL_TEXTUREACCESS_STREAMING, |
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sdl->window_width, sdl->window_height); |
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if (!sdl->texture) { |
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av_log(sdl, AV_LOG_ERROR, "Unable to set create mode: %s\n", SDL_GetError()); |
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goto fail; |
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} |
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av_log(s, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s -> w:%d h:%d\n", |
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codecpar->width, codecpar->height, av_get_pix_fmt_name(codecpar->format), |
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sdl->window_width, sdl->window_height); |
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sdl->inited = 1; |
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return 0; |
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fail: |
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sdl2_write_trailer(s); |
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return ret; |
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} |
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static int sdl2_write_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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int ret = 0; |
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SDLContext *sdl = s->priv_data; |
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AVCodecParameters *codecpar = s->streams[0]->codecpar; |
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uint8_t *data[4]; |
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int linesize[4]; |
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SDL_Event event; |
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if (SDL_PollEvent(&event)){ |
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switch (event.type) { |
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case SDL_KEYDOWN: |
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switch (event.key.keysym.sym) { |
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case SDLK_ESCAPE: |
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case SDLK_q: |
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sdl->quit = 1; |
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break; |
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default: |
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break; |
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} |
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break; |
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case SDL_QUIT: |
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sdl->quit = 1; |
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break; |
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case SDL_WINDOWEVENT: |
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switch(event.window.event){ |
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case SDL_WINDOWEVENT_RESIZED: |
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case SDL_WINDOWEVENT_SIZE_CHANGED: |
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sdl->window_width = event.window.data1; |
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sdl->window_height = event.window.data2; |
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compute_texture_rect(s); |
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break; |
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default: |
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break; |
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} |
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break; |
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default: |
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break; |
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} |
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} |
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if (sdl->quit) { |
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sdl2_write_trailer(s); |
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return AVERROR(EIO); |
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} |
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av_image_fill_arrays(data, linesize, pkt->data, codecpar->format, codecpar->width, codecpar->height, 1); |
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SDL_LockMutex(sdl->mutex); |
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switch (sdl->texture_fmt) { |
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/* case SDL_PIXELFORMAT_ARGB4444:
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* case SDL_PIXELFORMAT_RGBA4444: |
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* case SDL_PIXELFORMAT_ABGR4444: |
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* case SDL_PIXELFORMAT_BGRA4444: |
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* case SDL_PIXELFORMAT_ARGB1555: |
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* case SDL_PIXELFORMAT_RGBA5551: |
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* case SDL_PIXELFORMAT_ABGR1555: |
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* case SDL_PIXELFORMAT_BGRA5551: |
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* case SDL_PIXELFORMAT_ARGB2101010: |
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*/ |
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case SDL_PIXELFORMAT_IYUV: |
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case SDL_PIXELFORMAT_YUY2: |
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case SDL_PIXELFORMAT_UYVY: |
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ret = SDL_UpdateYUVTexture(sdl->texture, NULL, |
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data[0], linesize[0], |
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data[1], linesize[1], |
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data[2], linesize[2]); |
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break; |
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case SDL_PIXELFORMAT_RGB332: |
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case SDL_PIXELFORMAT_RGB444: |
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case SDL_PIXELFORMAT_RGB555: |
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case SDL_PIXELFORMAT_BGR555: |
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case SDL_PIXELFORMAT_RGB565: |
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case SDL_PIXELFORMAT_BGR565: |
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case SDL_PIXELFORMAT_RGB24: |
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case SDL_PIXELFORMAT_BGR24: |
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case SDL_PIXELFORMAT_RGB888: |
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case SDL_PIXELFORMAT_RGBX8888: |
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case SDL_PIXELFORMAT_BGR888: |
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case SDL_PIXELFORMAT_BGRX8888: |
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case SDL_PIXELFORMAT_ARGB8888: |
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case SDL_PIXELFORMAT_RGBA8888: |
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case SDL_PIXELFORMAT_ABGR8888: |
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case SDL_PIXELFORMAT_BGRA8888: |
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ret = SDL_UpdateTexture(sdl->texture, NULL, data[0], linesize[0]); |
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break; |
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default: |
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av_log(NULL, AV_LOG_FATAL, "Unsupported pixel format\n"); |
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ret = -1; |
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break; |
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} |
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SDL_RenderClear(sdl->renderer); |
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SDL_RenderCopy(sdl->renderer, sdl->texture, NULL, &sdl->texture_rect); |
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SDL_RenderPresent(sdl->renderer); |
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SDL_UnlockMutex(sdl->mutex); |
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return ret; |
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} |
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#define OFFSET(x) offsetof(SDLContext,x) |
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static const AVOption options[] = { |
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{ "window_title", "set SDL window title", OFFSET(window_title), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, |
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{ "window_size", "set SDL window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, { .str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, |
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{ "window_fullscreen", "set SDL window fullscreen", OFFSET(window_fullscreen), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM }, |
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{ "window_borderless", "set SDL window border off", OFFSET(window_borderless), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM }, |
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{ NULL }, |
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}; |
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static const AVClass sdl2_class = { |
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.class_name = "sdl2 outdev", |
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.item_name = av_default_item_name, |
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.option = options, |
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.version = LIBAVUTIL_VERSION_INT, |
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.category = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT, |
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}; |
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AVOutputFormat ff_sdl2_muxer = { |
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.name = "sdl2", |
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.long_name = NULL_IF_CONFIG_SMALL("SDL2 output device"), |
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.priv_data_size = sizeof(SDLContext), |
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.audio_codec = AV_CODEC_ID_NONE, |
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.video_codec = AV_CODEC_ID_RAWVIDEO, |
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.write_header = sdl2_write_header, |
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.write_packet = sdl2_write_packet, |
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.write_trailer = sdl2_write_trailer, |
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.flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS, |
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.priv_class = &sdl2_class, |
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}; |
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