| /* |
| * 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" |
| |
| 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; |
| } 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->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, |
| }; |
| |
| 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, |
| }; |