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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 }); |
108 |
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109 |
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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) { |
111 |
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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) { |
113 |
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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 */ |
118 |
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texture_rect->h = sdl->window_height; |
119 |
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texture_rect->w = av_rescale(texture_rect->h, dar.num, dar.den); |
120 |
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} |
121 |
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} else { |
122 |
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if (sar.num > sar.den) { |
123 |
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texture_rect->w = codecpar->width; |
124 |
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texture_rect->h = av_rescale(texture_rect->w, dar.den, dar.num); |
125 |
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} else { |
126 |
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texture_rect->h = codecpar->height; |
127 |
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texture_rect->w = av_rescale(texture_rect->h, dar.num, dar.den); |
128 |
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} |
129 |
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sdl->window_width = texture_rect->w; |
130 |
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sdl->window_height = texture_rect->h; |
131 |
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} |
132 |
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133 |
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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; |
135 |
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} |
136 |
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137 |
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static int sdl2_write_trailer(AVFormatContext *s) |
138 |
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{ |
139 |
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SDLContext *sdl = s->priv_data; |
140 |
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141 |
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if (sdl->texture) |
142 |
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SDL_DestroyTexture(sdl->texture); |
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sdl->texture = NULL; |
144 |
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145 |
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if (sdl->renderer) |
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SDL_DestroyRenderer(sdl->renderer); |
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sdl->renderer = NULL; |
148 |
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149 |
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if (sdl->window) |
150 |
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SDL_DestroyWindow(sdl->window); |
151 |
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sdl->window = NULL; |
152 |
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153 |
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if (!sdl->inited) |
154 |
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SDL_Quit(); |
155 |
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156 |
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return 0; |
157 |
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} |
158 |
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159 |
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static int sdl2_write_header(AVFormatContext *s) |
160 |
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{ |
161 |
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SDLContext *sdl = s->priv_data; |
162 |
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AVStream *st = s->streams[0]; |
163 |
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AVCodecParameters *codecpar = st->codecpar; |
164 |
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int i, ret = 0; |
165 |
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int flags = 0; |
166 |
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167 |
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if (!sdl->window_title) |
168 |
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sdl->window_title = av_strdup(s->url); |
169 |
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170 |
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if (SDL_WasInit(SDL_INIT_VIDEO)) { |
171 |
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av_log(s, AV_LOG_WARNING, |
172 |
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"SDL video subsystem was already inited, you could have multiple SDL outputs. This may cause unknown behaviour.\n"); |
173 |
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sdl->inited = 1; |
174 |
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} |
175 |
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176 |
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if ( s->nb_streams > 1 |
177 |
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|| codecpar->codec_type != AVMEDIA_TYPE_VIDEO |
178 |
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|| codecpar->codec_id != AV_CODEC_ID_RAWVIDEO) { |
179 |
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av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n"); |
180 |
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goto fail; |
181 |
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} |
182 |
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183 |
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for (i = 0; sdl_texture_format_map[i].format != AV_PIX_FMT_NONE; i++) { |
184 |
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if (sdl_texture_format_map[i].format == codecpar->format) { |
185 |
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sdl->texture_fmt = sdl_texture_format_map[i].texture_fmt; |
186 |
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break; |
187 |
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} |
188 |
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} |
189 |
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190 |
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if (!sdl->texture_fmt) { |
191 |
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av_log(s, AV_LOG_ERROR, |
192 |
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"Unsupported pixel format '%s'.\n", |
193 |
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av_get_pix_fmt_name(codecpar->format)); |
194 |
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goto fail; |
195 |
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} |
196 |
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197 |
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/* resize texture to width and height from the codec context information */ |
198 |
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flags = SDL_WINDOW_HIDDEN | |
199 |
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(sdl->window_fullscreen ? SDL_WINDOW_FULLSCREEN : 0) | |
200 |
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(sdl->window_borderless ? SDL_WINDOW_BORDERLESS : SDL_WINDOW_RESIZABLE); |
201 |
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202 |
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/* initialization */ |
203 |
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if (!sdl->inited){ |
204 |
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if (SDL_Init(SDL_INIT_VIDEO) != 0) { |
205 |
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av_log(s, AV_LOG_ERROR, "Unable to initialize SDL: %s\n", SDL_GetError()); |
206 |
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goto fail; |
207 |
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} |
208 |
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} |
209 |
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210 |
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compute_texture_rect(s); |
211 |
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212 |
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if (SDL_CreateWindowAndRenderer(sdl->window_width, sdl->window_height, |
213 |
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flags, &sdl->window, &sdl->renderer) != 0){ |
214 |
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av_log(sdl, AV_LOG_ERROR, "Couldn't create window and renderer: %s\n", SDL_GetError()); |
215 |
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goto fail; |
216 |
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} |
217 |
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218 |
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SDL_SetWindowTitle(sdl->window, sdl->window_title); |
219 |
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SDL_SetWindowPosition(sdl->window, sdl->window_x, sdl->window_y); |
220 |
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SDL_ShowWindow(sdl->window); |
221 |
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222 |
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sdl->texture = SDL_CreateTexture(sdl->renderer, sdl->texture_fmt, SDL_TEXTUREACCESS_STREAMING, |
223 |
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codecpar->width, codecpar->height); |
224 |
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225 |
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if (!sdl->texture) { |
226 |
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av_log(sdl, AV_LOG_ERROR, "Unable to set create mode: %s\n", SDL_GetError()); |
227 |
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goto fail; |
228 |
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} |
229 |
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230 |
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av_log(s, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s -> w:%d h:%d\n", |
231 |
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codecpar->width, codecpar->height, av_get_pix_fmt_name(codecpar->format), |
232 |
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sdl->window_width, sdl->window_height); |
233 |
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234 |
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sdl->inited = 1; |
235 |
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236 |
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return 0; |
237 |
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fail: |
238 |
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sdl2_write_trailer(s); |
239 |
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return ret; |
240 |
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} |
241 |
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242 |
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static int sdl2_write_packet(AVFormatContext *s, AVPacket *pkt) |
243 |
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{ |
244 |
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int ret, quit = 0; |
245 |
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SDLContext *sdl = s->priv_data; |
246 |
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AVCodecParameters *codecpar = s->streams[0]->codecpar; |
247 |
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uint8_t *data[4]; |
248 |
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int linesize[4]; |
249 |
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250 |
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SDL_Event event; |
251 |
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if (SDL_PollEvent(&event)){ |
252 |
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switch (event.type) { |
253 |
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case SDL_KEYDOWN: |
254 |
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switch (event.key.keysym.sym) { |
255 |
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case SDLK_ESCAPE: |
256 |
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case SDLK_q: |
257 |
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quit = 1; |
258 |
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break; |
259 |
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default: |
260 |
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break; |
261 |
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} |
262 |
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break; |
263 |
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case SDL_QUIT: |
264 |
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quit = 1; |
265 |
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break; |
266 |
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case SDL_WINDOWEVENT: |
267 |
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switch(event.window.event){ |
268 |
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case SDL_WINDOWEVENT_RESIZED: |
269 |
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case SDL_WINDOWEVENT_SIZE_CHANGED: |
270 |
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sdl->window_width = event.window.data1; |
271 |
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sdl->window_height = event.window.data2; |
272 |
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compute_texture_rect(s); |
273 |
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break; |
274 |
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default: |
275 |
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break; |
276 |
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} |
277 |
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break; |
278 |
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default: |
279 |
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break; |
280 |
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} |
281 |
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} |
282 |
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|
283 |
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if (quit && sdl->enable_quit_action) { |
284 |
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sdl2_write_trailer(s); |
285 |
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return AVERROR(EIO); |
286 |
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} |
287 |
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|
288 |
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av_image_fill_arrays(data, linesize, pkt->data, codecpar->format, codecpar->width, codecpar->height, 1); |
289 |
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switch (sdl->texture_fmt) { |
290 |
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/* case SDL_PIXELFORMAT_ARGB4444: |
291 |
|
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* case SDL_PIXELFORMAT_RGBA4444: |
292 |
|
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* case SDL_PIXELFORMAT_ABGR4444: |
293 |
|
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* case SDL_PIXELFORMAT_BGRA4444: |
294 |
|
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* case SDL_PIXELFORMAT_ARGB1555: |
295 |
|
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* case SDL_PIXELFORMAT_RGBA5551: |
296 |
|
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* case SDL_PIXELFORMAT_ABGR1555: |
297 |
|
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* case SDL_PIXELFORMAT_BGRA5551: |
298 |
|
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* case SDL_PIXELFORMAT_ARGB2101010: |
299 |
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*/ |
300 |
|
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case SDL_PIXELFORMAT_IYUV: |
301 |
|
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case SDL_PIXELFORMAT_YUY2: |
302 |
|
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case SDL_PIXELFORMAT_UYVY: |
303 |
|
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ret = SDL_UpdateYUVTexture(sdl->texture, NULL, |
304 |
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data[0], linesize[0], |
305 |
|
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data[1], linesize[1], |
306 |
|
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data[2], linesize[2]); |
307 |
|
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break; |
308 |
|
|
case SDL_PIXELFORMAT_RGB332: |
309 |
|
|
case SDL_PIXELFORMAT_RGB444: |
310 |
|
|
case SDL_PIXELFORMAT_RGB555: |
311 |
|
|
case SDL_PIXELFORMAT_BGR555: |
312 |
|
|
case SDL_PIXELFORMAT_RGB565: |
313 |
|
|
case SDL_PIXELFORMAT_BGR565: |
314 |
|
|
case SDL_PIXELFORMAT_RGB24: |
315 |
|
|
case SDL_PIXELFORMAT_BGR24: |
316 |
|
|
case SDL_PIXELFORMAT_RGB888: |
317 |
|
|
case SDL_PIXELFORMAT_RGBX8888: |
318 |
|
|
case SDL_PIXELFORMAT_BGR888: |
319 |
|
|
case SDL_PIXELFORMAT_BGRX8888: |
320 |
|
|
case SDL_PIXELFORMAT_ARGB8888: |
321 |
|
|
case SDL_PIXELFORMAT_RGBA8888: |
322 |
|
|
case SDL_PIXELFORMAT_ABGR8888: |
323 |
|
|
case SDL_PIXELFORMAT_BGRA8888: |
324 |
|
|
ret = SDL_UpdateTexture(sdl->texture, NULL, data[0], linesize[0]); |
325 |
|
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break; |
326 |
|
|
default: |
327 |
|
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av_log(NULL, AV_LOG_FATAL, "Unsupported pixel format\n"); |
328 |
|
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ret = -1; |
329 |
|
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break; |
330 |
|
|
} |
331 |
|
|
SDL_RenderClear(sdl->renderer); |
332 |
|
|
SDL_RenderCopy(sdl->renderer, sdl->texture, NULL, &sdl->texture_rect); |
333 |
|
|
SDL_RenderPresent(sdl->renderer); |
334 |
|
|
return ret; |
335 |
|
|
} |
336 |
|
|
|
337 |
|
|
#define OFFSET(x) offsetof(SDLContext,x) |
338 |
|
|
|
339 |
|
|
static const AVOption options[] = { |
340 |
|
|
{ "window_title", "set SDL window title", OFFSET(window_title), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, |
341 |
|
|
{ "window_size", "set SDL window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, { .str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, |
342 |
|
|
{ "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 }, |
343 |
|
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{ "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 }, |
344 |
|
|
{ "window_fullscreen", "set SDL window fullscreen", OFFSET(window_fullscreen), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM }, |
345 |
|
|
{ "window_borderless", "set SDL window border off", OFFSET(window_borderless), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM }, |
346 |
|
|
{ "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 }, |
347 |
|
|
{ NULL }, |
348 |
|
|
}; |
349 |
|
|
|
350 |
|
|
static const AVClass sdl2_class = { |
351 |
|
|
.class_name = "sdl2 outdev", |
352 |
|
|
.item_name = av_default_item_name, |
353 |
|
|
.option = options, |
354 |
|
|
.version = LIBAVUTIL_VERSION_INT, |
355 |
|
|
.category = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT, |
356 |
|
|
}; |
357 |
|
|
|
358 |
|
|
AVOutputFormat ff_sdl2_muxer = { |
359 |
|
|
.name = "sdl,sdl2", |
360 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("SDL2 output device"), |
361 |
|
|
.priv_data_size = sizeof(SDLContext), |
362 |
|
|
.audio_codec = AV_CODEC_ID_NONE, |
363 |
|
|
.video_codec = AV_CODEC_ID_RAWVIDEO, |
364 |
|
|
.write_header = sdl2_write_header, |
365 |
|
|
.write_packet = sdl2_write_packet, |
366 |
|
|
.write_trailer = sdl2_write_trailer, |
367 |
|
|
.flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS, |
368 |
|
|
.priv_class = &sdl2_class, |
369 |
|
|
}; |