[deb_ffmpeg.git] / ffmpeg / libavdevice / sdl.c

/*
 * Copyright (c) 2011 Stefano Sabatini
 *
 * 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
 * libSDL output device
 */

#include <SDL.h>
#include <SDL_thread.h>

#include "libavutil/avstring.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_Surface *surface;
    SDL_Overlay *overlay;
    char *window_title;
    char *icon_title;
    int window_width,  window_height;  /**< size of the window */
    int window_fullscreen;

    SDL_Rect overlay_rect;
    int overlay_fmt;

    int sdl_was_already_inited;
    SDL_Thread *event_thread;
    SDL_mutex *mutex;
    SDL_cond *init_cond;
    int init_ret; /* return code used to signal initialization errors */
    int inited;
    int quit;
} SDLContext;

static const struct sdl_overlay_pix_fmt_entry {
    enum AVPixelFormat pix_fmt; int overlay_fmt;
} sdl_overlay_pix_fmt_map[] = {
    { AV_PIX_FMT_YUV420P, SDL_IYUV_OVERLAY },
    { AV_PIX_FMT_YUYV422, SDL_YUY2_OVERLAY },
    { AV_PIX_FMT_UYVY422, SDL_UYVY_OVERLAY },
    { AV_PIX_FMT_NONE,    0                },
};

static int sdl_write_trailer(AVFormatContext *s)
{
    SDLContext *sdl = s->priv_data;

    sdl->quit = 1;

    if (sdl->overlay)
        SDL_FreeYUVOverlay(sdl->overlay);
    sdl->overlay = NULL;
    if (sdl->event_thread)
        SDL_WaitThread(sdl->event_thread, NULL);
    sdl->event_thread = NULL;
    if (sdl->mutex)
        SDL_DestroyMutex(sdl->mutex);
    sdl->mutex = NULL;
    if (sdl->init_cond)
        SDL_DestroyCond(sdl->init_cond);
    sdl->init_cond = NULL;

    if (!sdl->sdl_was_already_inited)
        SDL_Quit();

    return 0;
}

static void compute_overlay_rect(AVFormatContext *s)
{
    AVRational sar, dar; /* sample and display aspect ratios */
    SDLContext *sdl = s->priv_data;
    AVStream *st = s->streams[0];
    AVCodecContext *encctx = st->codec;
    SDL_Rect *overlay_rect = &sdl->overlay_rect;

    /* compute overlay 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){ encctx->width, encctx->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 */
            overlay_rect->w = sdl->window_width;
            overlay_rect->h = av_rescale(overlay_rect->w, dar.den, dar.num);
        } else {
            /* fit in height */
            overlay_rect->h = sdl->window_height;
            overlay_rect->w = av_rescale(overlay_rect->h, dar.num, dar.den);
        }
    } else {
        if (sar.num > sar.den) {
            overlay_rect->w = encctx->width;
            overlay_rect->h = av_rescale(overlay_rect->w, dar.den, dar.num);
        } else {
            overlay_rect->h = encctx->height;
            overlay_rect->w = av_rescale(overlay_rect->h, dar.num, dar.den);
        }
        sdl->window_width  = overlay_rect->w;
        sdl->window_height = overlay_rect->h;
    }

    overlay_rect->x = (sdl->window_width  - overlay_rect->w) / 2;
    overlay_rect->y = (sdl->window_height - overlay_rect->h) / 2;
}

#define SDL_BASE_FLAGS (SDL_SWSURFACE|SDL_RESIZABLE)

static int event_thread(void *arg)
{
    AVFormatContext *s = arg;
    SDLContext *sdl = s->priv_data;
    int flags = SDL_BASE_FLAGS | (sdl->window_fullscreen ? SDL_FULLSCREEN : 0);
    AVStream *st = s->streams[0];
    AVCodecContext *encctx = st->codec;

    /* initialization */
    if (SDL_Init(SDL_INIT_VIDEO) != 0) {
        av_log(s, AV_LOG_ERROR, "Unable to initialize SDL: %s\n", SDL_GetError());
        sdl->init_ret = AVERROR(EINVAL);
        goto init_end;
    }

    SDL_WM_SetCaption(sdl->window_title, sdl->icon_title);
    sdl->surface = SDL_SetVideoMode(sdl->window_width, sdl->window_height,
                                    24, flags);
    if (!sdl->surface) {
        av_log(sdl, AV_LOG_ERROR, "Unable to set video mode: %s\n", SDL_GetError());
        sdl->init_ret = AVERROR(EINVAL);
        goto init_end;
    }

    sdl->overlay = SDL_CreateYUVOverlay(encctx->width, encctx->height,
                                        sdl->overlay_fmt, sdl->surface);
    if (!sdl->overlay || sdl->overlay->pitches[0] < encctx->width) {
        av_log(s, AV_LOG_ERROR,
               "SDL does not support an overlay with size of %dx%d pixels\n",
               encctx->width, encctx->height);
        sdl->init_ret = AVERROR(EINVAL);
        goto init_end;
    }

    sdl->init_ret = 0;
    av_log(s, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s -> w:%d h:%d\n",
           encctx->width, encctx->height, av_get_pix_fmt_name(encctx->pix_fmt),
           sdl->overlay_rect.w, sdl->overlay_rect.h);

init_end:
    SDL_LockMutex(sdl->mutex);
    sdl->inited = 1;
    SDL_UnlockMutex(sdl->mutex);
    SDL_CondSignal(sdl->init_cond);

    if (sdl->init_ret < 0)
        return sdl->init_ret;

    /* event loop */
    while (!sdl->quit) {
        int ret;
        SDL_Event event;
        SDL_PumpEvents();
        ret = SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_ALLEVENTS);
        if (ret < 0) {
            av_log(s, AV_LOG_ERROR, "Error when getting SDL event: %s\n", SDL_GetError());
            continue;
        }
        if (ret == 0) {
            SDL_Delay(10);
            continue;
        }

        switch (event.type) {
        case SDL_KEYDOWN:
            switch (event.key.keysym.sym) {
            case SDLK_ESCAPE:
            case SDLK_q:
                sdl->quit = 1;
                break;
            }
            break;
        case SDL_QUIT:
            sdl->quit = 1;
            break;

        case SDL_VIDEORESIZE:
            sdl->window_width  = event.resize.w;
            sdl->window_height = event.resize.h;

            SDL_LockMutex(sdl->mutex);
            sdl->surface = SDL_SetVideoMode(sdl->window_width, sdl->window_height, 24, SDL_BASE_FLAGS);
            if (!sdl->surface) {
                av_log(s, AV_LOG_ERROR, "Failed to set SDL video mode: %s\n", SDL_GetError());
                sdl->quit = 1;
            } else {
                compute_overlay_rect(s);
            }
            SDL_UnlockMutex(sdl->mutex);
            break;

        default:
            break;
        }
    }

    return 0;
}

static int sdl_write_header(AVFormatContext *s)
{
    SDLContext *sdl = s->priv_data;
    AVStream *st = s->streams[0];
    AVCodecContext *encctx = st->codec;
    int i, ret;

    if (!sdl->window_title)
        sdl->window_title = av_strdup(s->filename);
    if (!sdl->icon_title)
        sdl->icon_title = av_strdup(sdl->window_title);

    if (SDL_WasInit(SDL_INIT_VIDEO)) {
        av_log(s, AV_LOG_ERROR,
               "SDL video subsystem was already inited, aborting\n");
        sdl->sdl_was_already_inited = 1;
        ret = AVERROR(EINVAL);
        goto fail;
    }

    if (   s->nb_streams > 1
        || encctx->codec_type != AVMEDIA_TYPE_VIDEO
        || encctx->codec_id   != AV_CODEC_ID_RAWVIDEO) {
        av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n");
        ret = AVERROR(EINVAL);
        goto fail;
    }

    for (i = 0; sdl_overlay_pix_fmt_map[i].pix_fmt != AV_PIX_FMT_NONE; i++) {
        if (sdl_overlay_pix_fmt_map[i].pix_fmt == encctx->pix_fmt) {
            sdl->overlay_fmt = sdl_overlay_pix_fmt_map[i].overlay_fmt;
            break;
        }
    }

    if (!sdl->overlay_fmt) {
        av_log(s, AV_LOG_ERROR,
               "Unsupported pixel format '%s', choose one of yuv420p, yuyv422, or uyvy422\n",
               av_get_pix_fmt_name(encctx->pix_fmt));
        ret = AVERROR(EINVAL);
        goto fail;
    }

    /* compute overlay width and height from the codec context information */
    compute_overlay_rect(s);

    sdl->init_cond = SDL_CreateCond();
    if (!sdl->init_cond) {
        av_log(s, AV_LOG_ERROR, "Could not create SDL condition variable: %s\n", SDL_GetError());
        ret = AVERROR_EXTERNAL;
        goto fail;
    }
    sdl->mutex = SDL_CreateMutex();
    if (!sdl->mutex) {
        av_log(s, AV_LOG_ERROR, "Could not create SDL mutex: %s\n", SDL_GetError());
        ret = AVERROR_EXTERNAL;
        goto fail;
    }
    sdl->event_thread = SDL_CreateThread(event_thread, s);
    if (!sdl->event_thread) {
        av_log(s, AV_LOG_ERROR, "Could not create SDL event thread: %s\n", SDL_GetError());
        ret = AVERROR_EXTERNAL;
        goto fail;
    }

    /* wait until the video system has been inited */
    SDL_LockMutex(sdl->mutex);
    while (!sdl->inited) {
        SDL_CondWait(sdl->init_cond, sdl->mutex);
    }
    SDL_UnlockMutex(sdl->mutex);
    if (sdl->init_ret < 0) {
        ret = sdl->init_ret;
        goto fail;
    }
    return 0;

fail:
    sdl_write_trailer(s);
    return ret;
}

static int sdl_write_packet(AVFormatContext *s, AVPacket *pkt)
{
    SDLContext *sdl = s->priv_data;
    AVCodecContext *encctx = s->streams[0]->codec;
    AVPicture pict;
    int i;

    if (sdl->quit) {
        sdl_write_trailer(s);
        return AVERROR(EIO);
    }
    avpicture_fill(&pict, pkt->data, encctx->pix_fmt, encctx->width, encctx->height);

    SDL_LockMutex(sdl->mutex);
    SDL_FillRect(sdl->surface, &sdl->surface->clip_rect,
                 SDL_MapRGB(sdl->surface->format, 0, 0, 0));
    SDL_LockYUVOverlay(sdl->overlay);
    for (i = 0; i < 3; i++) {
        sdl->overlay->pixels [i] = pict.data    [i];
        sdl->overlay->pitches[i] = pict.linesize[i];
    }
    SDL_DisplayYUVOverlay(sdl->overlay, &sdl->overlay_rect);
    SDL_UnlockYUVOverlay(sdl->overlay);

    SDL_UpdateRect(sdl->surface,
                   sdl->overlay_rect.x, sdl->overlay_rect.y,
                   sdl->overlay_rect.w, sdl->overlay_rect.h);
    SDL_UnlockMutex(sdl->mutex);

    return 0;
}

#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 },
    { "icon_title",   "set SDL iconified window title", OFFSET(icon_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_fullscreen", "set SDL window fullscreen", OFFSET(window_fullscreen), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
    { NULL },
};

static const AVClass sdl_class = {
    .class_name = "sdl outdev",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
    .category   = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT,
};

AVOutputFormat ff_sdl_muxer = {
    .name           = "sdl",
    .long_name      = NULL_IF_CONFIG_SMALL("SDL output device"),
    .priv_data_size = sizeof(SDLContext),
    .audio_codec    = AV_CODEC_ID_NONE,
    .video_codec    = AV_CODEC_ID_RAWVIDEO,
    .write_header   = sdl_write_header,
    .write_packet   = sdl_write_packet,
    .write_trailer  = sdl_write_trailer,
    .flags          = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS,
    .priv_class     = &sdl_class,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* Copyright (c) 2011 Stefano Sabatini
	3	*
	4	* This file is part of FFmpeg.
	5	*
	6	* FFmpeg is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2.1 of the License, or (at your option) any later version.
	10	*
	11	* FFmpeg is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with FFmpeg; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	/**
	22	* @file
	23	* libSDL output device
	24	*/
	25
	26	#include <SDL.h>
	27	#include <SDL_thread.h>
	28
	29	#include "libavutil/avstring.h"
	30	#include "libavutil/opt.h"
	31	#include "libavutil/parseutils.h"
	32	#include "libavutil/pixdesc.h"
	33	#include "libavutil/time.h"
	34	#include "avdevice.h"
	35
	36	typedef struct {
	37	AVClass *class;
	38	SDL_Surface *surface;
	39	SDL_Overlay *overlay;
	40	char *window_title;
	41	char *icon_title;
	42	int window_width, window_height; /*< size of the window /
	43	int window_fullscreen;
	44
	45	SDL_Rect overlay_rect;
	46	int overlay_fmt;
	47
	48	int sdl_was_already_inited;
	49	SDL_Thread *event_thread;
	50	SDL_mutex *mutex;
	51	SDL_cond *init_cond;
	52	int init_ret; /* return code used to signal initialization errors */
	53	int inited;
	54	int quit;
	55	} SDLContext;
	56
	57	static const struct sdl_overlay_pix_fmt_entry {
	58	enum AVPixelFormat pix_fmt; int overlay_fmt;
	59	} sdl_overlay_pix_fmt_map[] = {
	60	{ AV_PIX_FMT_YUV420P, SDL_IYUV_OVERLAY },
	61	{ AV_PIX_FMT_YUYV422, SDL_YUY2_OVERLAY },
	62	{ AV_PIX_FMT_UYVY422, SDL_UYVY_OVERLAY },
	63	{ AV_PIX_FMT_NONE, 0 },
	64	};
65
66	static int sdl_write_trailer(AVFormatContext *s)
67	{
68	SDLContext *sdl = s->priv_data;
69
70	sdl->quit = 1;
71
72	if (sdl->overlay)
73	SDL_FreeYUVOverlay(sdl->overlay);
74	sdl->overlay = NULL;
75	if (sdl->event_thread)
76	SDL_WaitThread(sdl->event_thread, NULL);
77	sdl->event_thread = NULL;
78	if (sdl->mutex)
79	SDL_DestroyMutex(sdl->mutex);
80	sdl->mutex = NULL;
81	if (sdl->init_cond)
82	SDL_DestroyCond(sdl->init_cond);
83	sdl->init_cond = NULL;
84
85	if (!sdl->sdl_was_already_inited)
86	SDL_Quit();
87
88	return 0;
89	}
90
91	static void compute_overlay_rect(AVFormatContext *s)
92	{
93	AVRational sar, dar; /* sample and display aspect ratios */
94	SDLContext *sdl = s->priv_data;
95	AVStream *st = s->streams[0];
96	AVCodecContext *encctx = st->codec;
97	SDL_Rect *overlay_rect = &sdl->overlay_rect;
98
99	/* compute overlay width and height from the codec context information */
100	sar = st->sample_aspect_ratio.num ? st->sample_aspect_ratio : (AVRational){ 1, 1 };
101	dar = av_mul_q(sar, (AVRational){ encctx->width, encctx->height });
102
103	/* we suppose the screen has a 1/1 sample aspect ratio */
104	if (sdl->window_width && sdl->window_height) {
105	/* fit in the window */
106	if (av_cmp_q(dar, (AVRational){ sdl->window_width, sdl->window_height }) > 0) {
107	/* fit in width */
108	overlay_rect->w = sdl->window_width;
109	overlay_rect->h = av_rescale(overlay_rect->w, dar.den, dar.num);
110	} else {
111	/* fit in height */
112	overlay_rect->h = sdl->window_height;
113	overlay_rect->w = av_rescale(overlay_rect->h, dar.num, dar.den);
114	}
115	} else {
116	if (sar.num > sar.den) {
117	overlay_rect->w = encctx->width;
118	overlay_rect->h = av_rescale(overlay_rect->w, dar.den, dar.num);
119	} else {
120	overlay_rect->h = encctx->height;
121	overlay_rect->w = av_rescale(overlay_rect->h, dar.num, dar.den);
122	}
123	sdl->window_width = overlay_rect->w;
124	sdl->window_height = overlay_rect->h;
125	}
126
127	overlay_rect->x = (sdl->window_width - overlay_rect->w) / 2;
128	overlay_rect->y = (sdl->window_height - overlay_rect->h) / 2;
129	}
130
131	#define SDL_BASE_FLAGS (SDL_SWSURFACE\|SDL_RESIZABLE)
132
133	static int event_thread(void *arg)
134	{
135	AVFormatContext *s = arg;
136	SDLContext *sdl = s->priv_data;
137	int flags = SDL_BASE_FLAGS \| (sdl->window_fullscreen ? SDL_FULLSCREEN : 0);
138	AVStream *st = s->streams[0];
139	AVCodecContext *encctx = st->codec;
140
141	/* initialization */
142	if (SDL_Init(SDL_INIT_VIDEO) != 0) {
143	av_log(s, AV_LOG_ERROR, "Unable to initialize SDL: %s\n", SDL_GetError());
144	sdl->init_ret = AVERROR(EINVAL);
145	goto init_end;
146	}
147
148	SDL_WM_SetCaption(sdl->window_title, sdl->icon_title);
149	sdl->surface = SDL_SetVideoMode(sdl->window_width, sdl->window_height,
150	24, flags);
151	if (!sdl->surface) {
152	av_log(sdl, AV_LOG_ERROR, "Unable to set video mode: %s\n", SDL_GetError());
153	sdl->init_ret = AVERROR(EINVAL);
154	goto init_end;
155	}
156
157	sdl->overlay = SDL_CreateYUVOverlay(encctx->width, encctx->height,
158	sdl->overlay_fmt, sdl->surface);
159	if (!sdl->overlay \|\| sdl->overlay->pitches[0] < encctx->width) {
160	av_log(s, AV_LOG_ERROR,
161	"SDL does not support an overlay with size of %dx%d pixels\n",
162	encctx->width, encctx->height);
163	sdl->init_ret = AVERROR(EINVAL);
164	goto init_end;
165	}
166
167	sdl->init_ret = 0;
168	av_log(s, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s -> w:%d h:%d\n",
169	encctx->width, encctx->height, av_get_pix_fmt_name(encctx->pix_fmt),
170	sdl->overlay_rect.w, sdl->overlay_rect.h);
171
172	init_end:
173	SDL_LockMutex(sdl->mutex);
174	sdl->inited = 1;
175	SDL_UnlockMutex(sdl->mutex);
176	SDL_CondSignal(sdl->init_cond);
177
178	if (sdl->init_ret < 0)
179	return sdl->init_ret;
180
181	/* event loop */
182	while (!sdl->quit) {
183	int ret;
184	SDL_Event event;
185	SDL_PumpEvents();
186	ret = SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_ALLEVENTS);
187	if (ret < 0) {
188	av_log(s, AV_LOG_ERROR, "Error when getting SDL event: %s\n", SDL_GetError());
189	continue;
190	}
191	if (ret == 0) {
192	SDL_Delay(10);
193	continue;
194	}
195
196	switch (event.type) {
197	case SDL_KEYDOWN:
198	switch (event.key.keysym.sym) {
199	case SDLK_ESCAPE:
200	case SDLK_q:
201	sdl->quit = 1;
202	break;
203	}
204	break;
205	case SDL_QUIT:
206	sdl->quit = 1;
207	break;
208
209	case SDL_VIDEORESIZE:
210	sdl->window_width = event.resize.w;
211	sdl->window_height = event.resize.h;
212
213	SDL_LockMutex(sdl->mutex);
214	sdl->surface = SDL_SetVideoMode(sdl->window_width, sdl->window_height, 24, SDL_BASE_FLAGS);
215	if (!sdl->surface) {
216	av_log(s, AV_LOG_ERROR, "Failed to set SDL video mode: %s\n", SDL_GetError());
217	sdl->quit = 1;
218	} else {
219	compute_overlay_rect(s);
220	}
221	SDL_UnlockMutex(sdl->mutex);
222	break;
223
224	default:
225	break;
226	}
227	}
228
229	return 0;
230	}
231
232	static int sdl_write_header(AVFormatContext *s)
233	{
234	SDLContext *sdl = s->priv_data;
235	AVStream *st = s->streams[0];
236	AVCodecContext *encctx = st->codec;
237	int i, ret;
238
239	if (!sdl->window_title)
240	sdl->window_title = av_strdup(s->filename);
241	if (!sdl->icon_title)
242	sdl->icon_title = av_strdup(sdl->window_title);
243
244	if (SDL_WasInit(SDL_INIT_VIDEO)) {
245	av_log(s, AV_LOG_ERROR,
246	"SDL video subsystem was already inited, aborting\n");
247	sdl->sdl_was_already_inited = 1;
248	ret = AVERROR(EINVAL);
249	goto fail;
250	}
251
252	if ( s->nb_streams > 1
253	\|\| encctx->codec_type != AVMEDIA_TYPE_VIDEO
254	\|\| encctx->codec_id != AV_CODEC_ID_RAWVIDEO) {
255	av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n");
256	ret = AVERROR(EINVAL);
257	goto fail;
258	}
259
260	for (i = 0; sdl_overlay_pix_fmt_map[i].pix_fmt != AV_PIX_FMT_NONE; i++) {
261	if (sdl_overlay_pix_fmt_map[i].pix_fmt == encctx->pix_fmt) {
262	sdl->overlay_fmt = sdl_overlay_pix_fmt_map[i].overlay_fmt;
263	break;
264	}
265	}
266
267	if (!sdl->overlay_fmt) {
268	av_log(s, AV_LOG_ERROR,
269	"Unsupported pixel format '%s', choose one of yuv420p, yuyv422, or uyvy422\n",
270	av_get_pix_fmt_name(encctx->pix_fmt));
271	ret = AVERROR(EINVAL);
272	goto fail;
273	}
274
275	/* compute overlay width and height from the codec context information */
276	compute_overlay_rect(s);
277
278	sdl->init_cond = SDL_CreateCond();
279	if (!sdl->init_cond) {
280	av_log(s, AV_LOG_ERROR, "Could not create SDL condition variable: %s\n", SDL_GetError());
281	ret = AVERROR_EXTERNAL;
282	goto fail;
283	}
284	sdl->mutex = SDL_CreateMutex();
285	if (!sdl->mutex) {
286	av_log(s, AV_LOG_ERROR, "Could not create SDL mutex: %s\n", SDL_GetError());
287	ret = AVERROR_EXTERNAL;
288	goto fail;
289	}
290	sdl->event_thread = SDL_CreateThread(event_thread, s);
291	if (!sdl->event_thread) {
292	av_log(s, AV_LOG_ERROR, "Could not create SDL event thread: %s\n", SDL_GetError());
293	ret = AVERROR_EXTERNAL;
294	goto fail;
295	}
296
297	/* wait until the video system has been inited */
298	SDL_LockMutex(sdl->mutex);
299	while (!sdl->inited) {
300	SDL_CondWait(sdl->init_cond, sdl->mutex);
301	}
302	SDL_UnlockMutex(sdl->mutex);
303	if (sdl->init_ret < 0) {
304	ret = sdl->init_ret;
305	goto fail;
306	}
307	return 0;
308
309	fail:
310	sdl_write_trailer(s);
311	return ret;
312	}
313
314	static int sdl_write_packet(AVFormatContext s, AVPacket pkt)
315	{
316	SDLContext *sdl = s->priv_data;
317	AVCodecContext *encctx = s->streams[0]->codec;
318	AVPicture pict;
319	int i;
320
321	if (sdl->quit) {
322	sdl_write_trailer(s);
323	return AVERROR(EIO);
324	}
325	avpicture_fill(&pict, pkt->data, encctx->pix_fmt, encctx->width, encctx->height);
326
327	SDL_LockMutex(sdl->mutex);
328	SDL_FillRect(sdl->surface, &sdl->surface->clip_rect,
329	SDL_MapRGB(sdl->surface->format, 0, 0, 0));
330	SDL_LockYUVOverlay(sdl->overlay);
331	for (i = 0; i < 3; i++) {
332	sdl->overlay->pixels [i] = pict.data [i];
333	sdl->overlay->pitches[i] = pict.linesize[i];
334	}
335	SDL_DisplayYUVOverlay(sdl->overlay, &sdl->overlay_rect);
336	SDL_UnlockYUVOverlay(sdl->overlay);
337
338	SDL_UpdateRect(sdl->surface,
339	sdl->overlay_rect.x, sdl->overlay_rect.y,
340	sdl->overlay_rect.w, sdl->overlay_rect.h);
341	SDL_UnlockMutex(sdl->mutex);
342
343	return 0;
344	}
345
346	#define OFFSET(x) offsetof(SDLContext,x)
347
348	static const AVOption options[] = {
349	{ "window_title", "set SDL window title", OFFSET(window_title), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
350	{ "icon_title", "set SDL iconified window title", OFFSET(icon_title) , AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
351	{ "window_size", "set SDL window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, { .str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
352	{ "window_fullscreen", "set SDL window fullscreen", OFFSET(window_fullscreen), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
353	{ NULL },
354	};
355
356	static const AVClass sdl_class = {
357	.class_name = "sdl outdev",
358	.item_name = av_default_item_name,
359	.option = options,
360	.version = LIBAVUTIL_VERSION_INT,
361	.category = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT,
362	};
363
364	AVOutputFormat ff_sdl_muxer = {
365	.name = "sdl",
366	.long_name = NULL_IF_CONFIG_SMALL("SDL output device"),
367	.priv_data_size = sizeof(SDLContext),
368	.audio_codec = AV_CODEC_ID_NONE,
369	.video_codec = AV_CODEC_ID_RAWVIDEO,
370	.write_header = sdl_write_header,
371	.write_packet = sdl_write_packet,
372	.write_trailer = sdl_write_trailer,
373	.flags = AVFMT_NOFILE \| AVFMT_VARIABLE_FPS \| AVFMT_NOTIMESTAMPS,
374	.priv_class = &sdl_class,
375	};