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lavd/sdl: factorize overlay rect size in a separate function

This commit is contained in:
Stefano Sabatini 2013-11-25 12:28:53 +01:00
parent 7de3b1394b
commit 7467b4f71b
1 changed files with 49 additions and 35 deletions
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84
libavdevice/sdl.c
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@ -41,9 +41,10 @@ typedef struct {
char *icon_title;
int window_width, window_height; /**< size of the window */
int window_fullscreen;
int overlay_width, overlay_height; /**< size of the video in the window */
int overlay_x, overlay_y;
SDL_Rect overlay_rect;
int overlay_fmt;
int sdl_was_already_inited;
SDL_Thread *event_thread;
SDL_mutex *mutex;
@ -120,7 +121,7 @@ static int event_thread(void *arg)
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_width, sdl->overlay_height);
sdl->overlay_rect.w, sdl->overlay_rect.h);
init_end:
SDL_LockMutex(sdl->mutex);
@ -162,12 +163,51 @@ init_end:
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;
}
static int sdl_write_header(AVFormatContext *s)
{
SDLContext *sdl = s->priv_data;
AVStream *st = s->streams[0];
AVCodecContext *encctx = st->codec;
AVRational sar, dar; /* sample and display aspect ratios */
int i, ret;
if (!sdl->window_title)
@ -207,34 +247,7 @@ static int sdl_write_header(AVFormatContext *s)
}
/* 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 */
sdl->overlay_width = sdl->window_width;
sdl->overlay_height = av_rescale(sdl->overlay_width, dar.den, dar.num);
} else {
/* fit in height */
sdl->overlay_height = sdl->window_height;
sdl->overlay_width = av_rescale(sdl->overlay_height, dar.num, dar.den);
}
} else {
if (sar.num > sar.den) {
sdl->overlay_width = encctx->width;
sdl->overlay_height = av_rescale(sdl->overlay_width, dar.den, dar.num);
} else {
sdl->overlay_height = encctx->height;
sdl->overlay_width = av_rescale(sdl->overlay_height, dar.num, dar.den);
}
sdl->window_width = sdl->overlay_width;
sdl->window_height = sdl->overlay_height;
}
sdl->overlay_x = (sdl->window_width - sdl->overlay_width ) / 2;
sdl->overlay_y = (sdl->window_height - sdl->overlay_height) / 2;
compute_overlay_rect(s);
sdl->init_cond = SDL_CreateCond();
if (!sdl->init_cond) {
@ -276,7 +289,6 @@ static int sdl_write_packet(AVFormatContext *s, AVPacket *pkt)
{
SDLContext *sdl = s->priv_data;
AVCodecContext *encctx = s->streams[0]->codec;
SDL_Rect rect = { sdl->overlay_x, sdl->overlay_y, sdl->overlay_width, sdl->overlay_height };
AVPicture pict;
int i;
@ -294,10 +306,12 @@ static int sdl_write_packet(AVFormatContext *s, AVPacket *pkt)
sdl->overlay->pixels [i] = pict.data [i];
sdl->overlay->pitches[i] = pict.linesize[i];
}
SDL_DisplayYUVOverlay(sdl->overlay, &rect);
SDL_DisplayYUVOverlay(sdl->overlay, &sdl->overlay_rect);
SDL_UnlockYUVOverlay(sdl->overlay);
SDL_UpdateRect(sdl->surface, rect.x, rect.y, rect.w, rect.h);
SDL_UpdateRect(sdl->surface,
sdl->overlay_rect.x, sdl->overlay_rect.y,
sdl->overlay_rect.w, sdl->overlay_rect.h);
return 0;
}