370 lines
13 KiB
C
370 lines
13 KiB
C
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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_x, window_y; /**< position of the window */
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int window_fullscreen;
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int window_borderless;
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int enable_quit_action;
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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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} 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_0RGB32, SDL_PIXELFORMAT_RGB888 },
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{ AV_PIX_FMT_0BGR32, SDL_PIXELFORMAT_BGR888 },
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#if HAVE_BIGENDIAN
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{ AV_PIX_FMT_RGB0, SDL_PIXELFORMAT_RGBX8888 },
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{ AV_PIX_FMT_BGR0, SDL_PIXELFORMAT_BGRX8888 },
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#else
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{ AV_PIX_FMT_0BGR, SDL_PIXELFORMAT_RGBX8888 },
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{ AV_PIX_FMT_0RGB, SDL_PIXELFORMAT_BGRX8888 },
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#endif
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{ AV_PIX_FMT_RGB32, SDL_PIXELFORMAT_ARGB8888 },
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{ AV_PIX_FMT_RGB32_1, SDL_PIXELFORMAT_RGBA8888 },
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{ AV_PIX_FMT_BGR32, SDL_PIXELFORMAT_ABGR8888 },
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{ AV_PIX_FMT_BGR32_1, 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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if (sdl->texture)
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SDL_DestroyTexture(sdl->texture);
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sdl->texture = 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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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->url);
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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'.\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_WINDOW_HIDDEN |
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(sdl->window_fullscreen ? SDL_WINDOW_FULLSCREEN : 0) |
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(sdl->window_borderless ? SDL_WINDOW_BORDERLESS : SDL_WINDOW_RESIZABLE);
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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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compute_texture_rect(s);
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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_SetWindowPosition(sdl->window, sdl->window_x, sdl->window_y);
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SDL_ShowWindow(sdl->window);
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sdl->texture = SDL_CreateTexture(sdl->renderer, sdl->texture_fmt, SDL_TEXTUREACCESS_STREAMING,
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codecpar->width, codecpar->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, quit = 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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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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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 (quit && sdl->enable_quit_action) {
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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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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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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 },
|
||
|
|
{ "window_x", "set SDL window x position", OFFSET(window_x), AV_OPT_TYPE_INT, { .i64 = SDL_WINDOWPOS_CENTERED }, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
|
||
|
|
{ "window_y", "set SDL window y position", OFFSET(window_y), AV_OPT_TYPE_INT, { .i64 = SDL_WINDOWPOS_CENTERED }, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
|
||
|
|
{ "window_fullscreen", "set SDL window fullscreen", OFFSET(window_fullscreen), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
|
||
|
|
{ "window_borderless", "set SDL window border off", OFFSET(window_borderless), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
|
||
|
|
{ "window_enable_quit", "set if quit action is available", OFFSET(enable_quit_action), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
|
||
|
|
{ NULL },
|
||
|
|
};
|
||
|
|
|
||
|
|
static const AVClass sdl2_class = {
|
||
|
|
.class_name = "sdl2 outdev",
|
||
|
|
.item_name = av_default_item_name,
|
||
|
|
.option = options,
|
||
|
|
.version = LIBAVUTIL_VERSION_INT,
|
||
|
|
.category = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT,
|
||
|
|
};
|
||
|
|
|
||
|
|
AVOutputFormat ff_sdl2_muxer = {
|
||
|
|
.name = "sdl,sdl2",
|
||
|
|
.long_name = NULL_IF_CONFIG_SMALL("SDL2 output device"),
|
||
|
|
.priv_data_size = sizeof(SDLContext),
|
||
|
|
.audio_codec = AV_CODEC_ID_NONE,
|
||
|
|
.video_codec = AV_CODEC_ID_RAWVIDEO,
|
||
|
|
.write_header = sdl2_write_header,
|
||
|
|
.write_packet = sdl2_write_packet,
|
||
|
|
.write_trailer = sdl2_write_trailer,
|
||
|
|
.flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS,
|
||
|
|
.priv_class = &sdl2_class,
|
||
|
|
};
|