| /* | |
| * Copyright (c) 2016 Josh de Kock | |
| * | |
| * 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 | |
| * libSDL2 output device | |
| */ | |
| #include <SDL.h> | |
| #include <SDL_thread.h> | |
| #include "libavutil/avstring.h" | |
| #include "libavutil/imgutils.h" | |
| #include "libavutil/opt.h" | |
| #include "libavutil/parseutils.h" | |
| #include "libavutil/pixdesc.h" | |
| #include "libavutil/time.h" | |
| #include "avdevice.h" | |
| #include "libavformat/mux.h" | |
| typedef struct { | |
| AVClass *class; | |
| SDL_Window *window; | |
| SDL_Renderer *renderer; | |
| char *window_title; | |
| int window_width, window_height; /**< size of the window */ | |
| int window_x, window_y; /**< position of the window */ | |
| int window_fullscreen; | |
| int window_borderless; | |
| int enable_quit_action; | |
| SDL_Texture *texture; | |
| int texture_fmt; | |
| SDL_Rect texture_rect; | |
| int inited; | |
| int warned; | |
| } SDLContext; | |
| static const struct sdl_texture_format_entry { | |
| enum AVPixelFormat format; int texture_fmt; | |
| } sdl_texture_format_map[] = { | |
| /* | |
| * Not implemented in FFmpeg, but leaving here for completeness. | |
| * { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_ARGB4444 }, | |
| * { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_RGBA4444 }, | |
| * { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_ABGR4444 }, | |
| * { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_BGRA4444 }, | |
| * { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_ARGB1555 }, | |
| * { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_RGBA5551 }, | |
| * { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_ABGR1555 }, | |
| * { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_BGRA5551 }, | |
| * { AV_PIX_FMT_NONE, SDL_PIXELFORMAT_ARGB2101010 }, | |
| */ | |
| { AV_PIX_FMT_RGB8, SDL_PIXELFORMAT_RGB332 }, | |
| { AV_PIX_FMT_RGB444, SDL_PIXELFORMAT_RGB444 }, | |
| { AV_PIX_FMT_RGB555, SDL_PIXELFORMAT_RGB555 }, | |
| { AV_PIX_FMT_BGR555, SDL_PIXELFORMAT_BGR555 }, | |
| { AV_PIX_FMT_RGB565, SDL_PIXELFORMAT_RGB565 }, | |
| { AV_PIX_FMT_BGR565, SDL_PIXELFORMAT_BGR565 }, | |
| { AV_PIX_FMT_RGB24, SDL_PIXELFORMAT_RGB24 }, | |
| { AV_PIX_FMT_BGR24, SDL_PIXELFORMAT_BGR24 }, | |
| { AV_PIX_FMT_0RGB32, SDL_PIXELFORMAT_RGB888 }, | |
| { AV_PIX_FMT_0BGR32, SDL_PIXELFORMAT_BGR888 }, | |
| #if HAVE_BIGENDIAN | |
| { AV_PIX_FMT_RGB0, SDL_PIXELFORMAT_RGBX8888 }, | |
| { AV_PIX_FMT_BGR0, SDL_PIXELFORMAT_BGRX8888 }, | |
| #else | |
| { AV_PIX_FMT_0BGR, SDL_PIXELFORMAT_RGBX8888 }, | |
| { AV_PIX_FMT_0RGB, SDL_PIXELFORMAT_BGRX8888 }, | |
| #endif | |
| { AV_PIX_FMT_RGB32, SDL_PIXELFORMAT_ARGB8888 }, | |
| { AV_PIX_FMT_RGB32_1, SDL_PIXELFORMAT_RGBA8888 }, | |
| { AV_PIX_FMT_BGR32, SDL_PIXELFORMAT_ABGR8888 }, | |
| { AV_PIX_FMT_BGR32_1, SDL_PIXELFORMAT_BGRA8888 }, | |
| { AV_PIX_FMT_YUV420P, SDL_PIXELFORMAT_IYUV }, | |
| { AV_PIX_FMT_YUYV422, SDL_PIXELFORMAT_YUY2 }, | |
| { AV_PIX_FMT_UYVY422, SDL_PIXELFORMAT_UYVY }, | |
| { AV_PIX_FMT_NONE, 0 }, | |
| }; | |
| static void compute_texture_rect(AVFormatContext *s) | |
| { | |
| AVRational sar, dar; /* sample and display aspect ratios */ | |
| SDLContext *sdl = s->priv_data; | |
| AVStream *st = s->streams[0]; | |
| AVCodecParameters *codecpar = st->codecpar; | |
| SDL_Rect *texture_rect = &sdl->texture_rect; | |
| /* compute texture 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){ codecpar->width, codecpar->height }); | |
| /* we suppose the screen has a 1/1 sample aspect ratio */ | |
| if (sdl->window_width && sdl->window_height) { | |
| /* fit in the window */ | |
| if (av_cmp_q(dar, (AVRational){ sdl->window_width, sdl->window_height }) > 0) { | |
| /* fit in width */ | |
| texture_rect->w = sdl->window_width; | |
| texture_rect->h = av_rescale(texture_rect->w, dar.den, dar.num); | |
| } else { | |
| /* fit in height */ | |
| texture_rect->h = sdl->window_height; | |
| texture_rect->w = av_rescale(texture_rect->h, dar.num, dar.den); | |
| } | |
| } else { | |
| if (sar.num > sar.den) { | |
| texture_rect->w = codecpar->width; | |
| texture_rect->h = av_rescale(texture_rect->w, dar.den, dar.num); | |
| } else { | |
| texture_rect->h = codecpar->height; | |
| texture_rect->w = av_rescale(texture_rect->h, dar.num, dar.den); | |
| } | |
| sdl->window_width = texture_rect->w; | |
| sdl->window_height = texture_rect->h; | |
| } | |
| texture_rect->x = (sdl->window_width - texture_rect->w) / 2; | |
| texture_rect->y = (sdl->window_height - texture_rect->h) / 2; | |
| } | |
| static int sdl2_write_trailer(AVFormatContext *s) | |
| { | |
| SDLContext *sdl = s->priv_data; | |
| if (sdl->texture) | |
| SDL_DestroyTexture(sdl->texture); | |
| sdl->texture = NULL; | |
| if (sdl->renderer) | |
| SDL_DestroyRenderer(sdl->renderer); | |
| sdl->renderer = NULL; | |
| if (sdl->window) | |
| SDL_DestroyWindow(sdl->window); | |
| sdl->window = NULL; | |
| if (!sdl->inited) | |
| SDL_Quit(); | |
| return 0; | |
| } | |
| static int sdl2_write_header(AVFormatContext *s) | |
| { | |
| SDLContext *sdl = s->priv_data; | |
| AVStream *st = s->streams[0]; | |
| AVCodecParameters *codecpar = st->codecpar; | |
| int i, ret = 0; | |
| int flags = 0; | |
| if (!sdl->warned) { | |
| av_log(sdl, AV_LOG_WARNING, | |
| "The sdl output device is deprecated due to being fundamentally incompatible with libavformat API. " | |
| "For monitoring purposes in ffmpeg you can output to a file or use pipes and a video player.\n" | |
| "Example: ffmpeg -i INPUT -f nut -c:v rawvideo - | ffplay -\n" | |
| ); | |
| sdl->warned = 1; | |
| } | |
| if (!sdl->window_title) | |
| sdl->window_title = av_strdup(s->url); | |
| if (SDL_WasInit(SDL_INIT_VIDEO)) { | |
| av_log(s, AV_LOG_WARNING, | |
| "SDL video subsystem was already inited, you could have multiple SDL outputs. This may cause unknown behaviour.\n"); | |
| sdl->inited = 1; | |
| } | |
| if ( s->nb_streams > 1 | |
| || codecpar->codec_type != AVMEDIA_TYPE_VIDEO | |
| || codecpar->codec_id != AV_CODEC_ID_RAWVIDEO) { | |
| av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n"); | |
| goto fail; | |
| } | |
| for (i = 0; sdl_texture_format_map[i].format != AV_PIX_FMT_NONE; i++) { | |
| if (sdl_texture_format_map[i].format == codecpar->format) { | |
| sdl->texture_fmt = sdl_texture_format_map[i].texture_fmt; | |
| break; | |
| } | |
| } | |
| if (!sdl->texture_fmt) { | |
| av_log(s, AV_LOG_ERROR, | |
| "Unsupported pixel format '%s'.\n", | |
| av_get_pix_fmt_name(codecpar->format)); | |
| goto fail; | |
| } | |
| /* resize texture to width and height from the codec context information */ | |
| flags = SDL_WINDOW_HIDDEN | | |
| (sdl->window_fullscreen ? SDL_WINDOW_FULLSCREEN : 0) | | |
| (sdl->window_borderless ? SDL_WINDOW_BORDERLESS : SDL_WINDOW_RESIZABLE); | |
| /* initialization */ | |
| if (!sdl->inited){ | |
| if (SDL_Init(SDL_INIT_VIDEO) != 0) { | |
| av_log(s, AV_LOG_ERROR, "Unable to initialize SDL: %s\n", SDL_GetError()); | |
| goto fail; | |
| } | |
| } | |
| compute_texture_rect(s); | |
| if (SDL_CreateWindowAndRenderer(sdl->window_width, sdl->window_height, | |
| flags, &sdl->window, &sdl->renderer) != 0){ | |
| av_log(sdl, AV_LOG_ERROR, "Couldn't create window and renderer: %s\n", SDL_GetError()); | |
| goto fail; | |
| } | |
| SDL_SetWindowTitle(sdl->window, sdl->window_title); | |
| SDL_SetWindowPosition(sdl->window, sdl->window_x, sdl->window_y); | |
| SDL_ShowWindow(sdl->window); | |
| sdl->texture = SDL_CreateTexture(sdl->renderer, sdl->texture_fmt, SDL_TEXTUREACCESS_STREAMING, | |
| codecpar->width, codecpar->height); | |
| if (!sdl->texture) { | |
| av_log(sdl, AV_LOG_ERROR, "Unable to set create mode: %s\n", SDL_GetError()); | |
| goto fail; | |
| } | |
| av_log(s, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s -> w:%d h:%d\n", | |
| codecpar->width, codecpar->height, av_get_pix_fmt_name(codecpar->format), | |
| sdl->window_width, sdl->window_height); | |
| sdl->inited = 1; | |
| return 0; | |
| fail: | |
| sdl2_write_trailer(s); | |
| return ret; | |
| } | |
| static int sdl2_write_packet(AVFormatContext *s, AVPacket *pkt) | |
| { | |
| int ret, quit = 0; | |
| SDLContext *sdl = s->priv_data; | |
| AVCodecParameters *codecpar = s->streams[0]->codecpar; | |
| uint8_t *data[4]; | |
| int linesize[4]; | |
| SDL_Event event; | |
| if (SDL_PollEvent(&event)){ | |
| switch (event.type) { | |
| case SDL_KEYDOWN: | |
| switch (event.key.keysym.sym) { | |
| case SDLK_ESCAPE: | |
| case SDLK_q: | |
| quit = 1; | |
| break; | |
| default: | |
| break; | |
| } | |
| break; | |
| case SDL_QUIT: | |
| quit = 1; | |
| break; | |
| case SDL_WINDOWEVENT: | |
| switch(event.window.event){ | |
| case SDL_WINDOWEVENT_RESIZED: | |
| case SDL_WINDOWEVENT_SIZE_CHANGED: | |
| sdl->window_width = event.window.data1; | |
| sdl->window_height = event.window.data2; | |
| compute_texture_rect(s); | |
| break; | |
| default: | |
| break; | |
| } | |
| break; | |
| default: | |
| break; | |
| } | |
| } | |
| if (quit && sdl->enable_quit_action) { | |
| sdl2_write_trailer(s); | |
| return AVERROR(EIO); | |
| } | |
| av_image_fill_arrays(data, linesize, pkt->data, codecpar->format, codecpar->width, codecpar->height, 1); | |
| switch (sdl->texture_fmt) { | |
| /* case SDL_PIXELFORMAT_ARGB4444: | |
| * case SDL_PIXELFORMAT_RGBA4444: | |
| * case SDL_PIXELFORMAT_ABGR4444: | |
| * case SDL_PIXELFORMAT_BGRA4444: | |
| * case SDL_PIXELFORMAT_ARGB1555: | |
| * case SDL_PIXELFORMAT_RGBA5551: | |
| * case SDL_PIXELFORMAT_ABGR1555: | |
| * case SDL_PIXELFORMAT_BGRA5551: | |
| * case SDL_PIXELFORMAT_ARGB2101010: | |
| */ | |
| case SDL_PIXELFORMAT_IYUV: | |
| case SDL_PIXELFORMAT_YUY2: | |
| case SDL_PIXELFORMAT_UYVY: | |
| ret = SDL_UpdateYUVTexture(sdl->texture, NULL, | |
| data[0], linesize[0], | |
| data[1], linesize[1], | |
| data[2], linesize[2]); | |
| break; | |
| case SDL_PIXELFORMAT_RGB332: | |
| case SDL_PIXELFORMAT_RGB444: | |
| case SDL_PIXELFORMAT_RGB555: | |
| case SDL_PIXELFORMAT_BGR555: | |
| case SDL_PIXELFORMAT_RGB565: | |
| case SDL_PIXELFORMAT_BGR565: | |
| case SDL_PIXELFORMAT_RGB24: | |
| case SDL_PIXELFORMAT_BGR24: | |
| case SDL_PIXELFORMAT_RGB888: | |
| case SDL_PIXELFORMAT_RGBX8888: | |
| case SDL_PIXELFORMAT_BGR888: | |
| case SDL_PIXELFORMAT_BGRX8888: | |
| case SDL_PIXELFORMAT_ARGB8888: | |
| case SDL_PIXELFORMAT_RGBA8888: | |
| case SDL_PIXELFORMAT_ABGR8888: | |
| case SDL_PIXELFORMAT_BGRA8888: | |
| ret = SDL_UpdateTexture(sdl->texture, NULL, data[0], linesize[0]); | |
| break; | |
| default: | |
| av_log(NULL, AV_LOG_FATAL, "Unsupported pixel format\n"); | |
| ret = -1; | |
| break; | |
| } | |
| SDL_RenderClear(sdl->renderer); | |
| SDL_RenderCopy(sdl->renderer, sdl->texture, NULL, &sdl->texture_rect); | |
| SDL_RenderPresent(sdl->renderer); | |
| return ret; | |
| } | |
| #define OFFSET(x) offsetof(SDLContext,x) | |
| static const AVOption options[] = { | |
| { "window_title", "set SDL window title", OFFSET(window_title), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, | |
| { "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, | |
| }; | |
| const FFOutputFormat ff_sdl2_muxer = { | |
| .p.name = "sdl,sdl2", | |
| .p.long_name = NULL_IF_CONFIG_SMALL("SDL2 output device"), | |
| .priv_data_size = sizeof(SDLContext), | |
| .p.audio_codec = AV_CODEC_ID_NONE, | |
| .p.video_codec = AV_CODEC_ID_RAWVIDEO, | |
| .write_header = sdl2_write_header, | |
| .write_packet = sdl2_write_packet, | |
| .write_trailer = sdl2_write_trailer, | |
| .p.flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS, | |
| .p.priv_class = &sdl2_class, | |
| }; |