[FFmpeg-devel] [PATCH] lavd/opengl: use SDL2
Josh de Kock
josh at itanimul.li
Sun Sep 18 01:30:43 EEST 2016
I did this in about 5 minutes, and only tested it with one sample (on
OSX using the cocoa opengl renderer). Seems to work, but probably
won't for all cases. Would like some feedback where it doesnt work etc
Signed-off-by: Josh de Kock <josh at itanimul.li>
---
libavdevice/opengl_enc.c | 87 +++++++++++++++++++++++++-----------------------
1 file changed, 46 insertions(+), 41 deletions(-)
diff --git a/libavdevice/opengl_enc.c b/libavdevice/opengl_enc.c
index 1dbbb80..1917459 100644
--- a/libavdevice/opengl_enc.c
+++ b/libavdevice/opengl_enc.c
@@ -46,7 +46,7 @@
#include <GL/glx.h>
#endif
-#if HAVE_SDL
+#if HAVE_SDL2
#include <SDL.h>
#endif
@@ -174,8 +174,10 @@ static const GLushort g_index[6] =
typedef struct OpenGLContext {
AVClass *class; ///< class for private options
-#if HAVE_SDL
- SDL_Surface *surface;
+#if HAVE_SDL2
+ SDL_Texture *texture;
+ SDL_Window *window;
+ SDL_Renderer *renderer;
#endif
FFOpenGLFunctions glprocs;
@@ -341,12 +343,18 @@ static int opengl_control_message(AVFormatContext *h, int type, void *data, size
return AVERROR(ENOSYS);
}
-#if HAVE_SDL
+#if HAVE_SDL2
static int opengl_sdl_recreate_window(OpenGLContext *opengl, int width, int height)
{
- opengl->surface = SDL_SetVideoMode(width, height,
- 32, SDL_OPENGL | SDL_RESIZABLE);
- if (!opengl->surface) {
+ int ret;
+ if ((ret = SDL_CreateWindowAndRenderer(width, height, 0, &opengl->window,
+ &opengl->renderer)) < 0)
+ return ret;
+
+ opengl->texture = SDL_CreateTexture(opengl->renderer, SDL_PIXELFORMAT_ARGB8888,
+ SDL_TEXTUREACCESS_STREAMING, width, height);
+
+ if (!opengl->texture) {
av_log(opengl, AV_LOG_ERROR, "Unable to set video mode: %s\n", SDL_GetError());
return AVERROR_EXTERNAL;
}
@@ -363,8 +371,7 @@ static int opengl_sdl_process_events(AVFormatContext *h)
int ret;
OpenGLContext *opengl = h->priv_data;
SDL_Event event;
- SDL_PumpEvents();
- while (SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_ALLEVENTS) > 0) {
+ while (SDL_PollEvent(&event) > 0) {
switch (event.type) {
case SDL_QUIT:
return AVERROR(EIO);
@@ -375,24 +382,23 @@ static int opengl_sdl_process_events(AVFormatContext *h)
return AVERROR(EIO);
}
return 0;
- case SDL_VIDEORESIZE: {
- char buffer[100];
- int reinit;
- AVDeviceRect message;
- /* clean up old context because SDL_SetVideoMode may lose its state. */
- SDL_VideoDriverName(buffer, sizeof(buffer));
- reinit = !av_strncasecmp(buffer, "quartz", sizeof(buffer));
- if (reinit) {
- opengl_deinit_context(opengl);
- }
- if ((ret = opengl_sdl_recreate_window(opengl, event.resize.w, event.resize.h)) < 0)
- return ret;
- if (reinit && (ret = opengl_init_context(opengl)) < 0)
- return ret;
- message.width = opengl->surface->w;
- message.height = opengl->surface->h;
- return opengl_control_message(h, AV_APP_TO_DEV_WINDOW_SIZE, &message, sizeof(AVDeviceRect));
+ case SDL_WINDOWEVENT:
+ switch(event.window.event){
+ case SDL_WINDOWEVENT_SIZE_CHANGED:
+ case SDL_WINDOWEVENT_RESIZED: {
+ AVDeviceRect message;
+ if ((ret = opengl_sdl_recreate_window(opengl, event.window.data1, event.window.data2)) < 0)
+ return ret;
+ if ((SDL_QueryTexture(opengl->texture, NULL, NULL, &message.width, &message.height)) < 0)
+ return ret;
+ return opengl_control_message(h, AV_APP_TO_DEV_WINDOW_SIZE, &message, sizeof(AVDeviceRect));
+ }
+ default:
+ break;
}
+ break;
+ default:
+ break;
}
}
return 0;
@@ -401,7 +407,6 @@ static int opengl_sdl_process_events(AVFormatContext *h)
static int av_cold opengl_sdl_create_window(AVFormatContext *h)
{
int ret;
- char buffer[100];
OpenGLContext *opengl = h->priv_data;
AVDeviceRect message;
if (SDL_Init(SDL_INIT_VIDEO)) {
@@ -411,10 +416,10 @@ static int av_cold opengl_sdl_create_window(AVFormatContext *h)
if ((ret = opengl_sdl_recreate_window(opengl, opengl->window_width,
opengl->window_height)) < 0)
return ret;
- av_log(opengl, AV_LOG_INFO, "SDL driver: '%s'.\n", SDL_VideoDriverName(buffer, sizeof(buffer)));
- message.width = opengl->surface->w;
- message.height = opengl->surface->h;
- SDL_WM_SetCaption(opengl->window_title, NULL);
+ av_log(opengl, AV_LOG_INFO, "SDL driver: '%s'.\n", SDL_GetCurrentVideoDriver());
+ if ((ret = SDL_QueryTexture(opengl->texture, NULL, NULL, &message.width, &message.height)) < 0)
+ return ret;
+ SDL_SetWindowTitle(opengl->window, opengl->window_title);
opengl_control_message(h, AV_APP_TO_DEV_WINDOW_SIZE, &message, sizeof(AVDeviceRect));
return 0;
}
@@ -460,14 +465,14 @@ static int av_cold opengl_sdl_load_procedures(OpenGLContext *opengl)
#undef LOAD_OPENGL_FUN
}
-#endif /* HAVE_SDL */
+#endif /* HAVE_SDL2 */
#if defined(__APPLE__)
static int av_cold opengl_load_procedures(OpenGLContext *opengl)
{
FFOpenGLFunctions *procs = &opengl->glprocs;
-#if HAVE_SDL
+#if HAVE_SDL2
if (!opengl->no_window)
return opengl_sdl_load_procedures(opengl);
#endif
@@ -517,7 +522,7 @@ static int av_cold opengl_load_procedures(OpenGLContext *opengl)
return AVERROR(ENOSYS); \
}
-#if HAVE_SDL
+#if HAVE_SDL2
if (!opengl->no_window)
return opengl_sdl_load_procedures(opengl);
#endif
@@ -943,7 +948,7 @@ static int opengl_create_window(AVFormatContext *h)
int ret;
if (!opengl->no_window) {
-#if HAVE_SDL
+#if HAVE_SDL2
if ((ret = opengl_sdl_create_window(h)) < 0) {
av_log(opengl, AV_LOG_ERROR, "Cannot create default SDL window.\n");
return ret;
@@ -975,7 +980,7 @@ static int opengl_release_window(AVFormatContext *h)
int ret;
OpenGLContext *opengl = h->priv_data;
if (!opengl->no_window) {
-#if HAVE_SDL
+#if HAVE_SDL2
SDL_Quit();
#endif
} else if ((ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_DESTROY_WINDOW_BUFFER, NULL , 0)) < 0) {
@@ -1109,9 +1114,9 @@ static av_cold int opengl_write_header(AVFormatContext *h)
glClear(GL_COLOR_BUFFER_BIT);
-#if HAVE_SDL
+#if HAVE_SDL2
if (!opengl->no_window)
- SDL_GL_SwapBuffers();
+ SDL_GL_SwapWindow(opengl->window);
#endif
if (opengl->no_window &&
(ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_DISPLAY_WINDOW_BUFFER, NULL , 0)) < 0) {
@@ -1204,7 +1209,7 @@ static int opengl_draw(AVFormatContext *h, void *input, int repaint, int is_pkt)
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
int ret;
-#if HAVE_SDL
+#if HAVE_SDL2
if (!opengl->no_window && (ret = opengl_sdl_process_events(h)) < 0)
goto fail;
#endif
@@ -1245,9 +1250,9 @@ static int opengl_draw(AVFormatContext *h, void *input, int repaint, int is_pkt)
ret = AVERROR_EXTERNAL;
OPENGL_ERROR_CHECK(opengl);
-#if HAVE_SDL
+#if HAVE_SDL2
if (!opengl->no_window)
- SDL_GL_SwapBuffers();
+ SDL_GL_SwapWindow(opengl->window);
#endif
if (opengl->no_window &&
(ret = avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_DISPLAY_WINDOW_BUFFER, NULL , 0)) < 0) {
--
2.8.4 (Apple Git-73)
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