I am having a problem with APEG, I'm wondering if anyone can help me out. I made a function that uses apeg_play_mpg, but it won't move on to the next thing until I hit a button. Does anybody know what could be happening?
EDIT: There is no readkey() or ureadkey() or anything of the sort in it
]]>It might help us help you if you could post the function. I'm not deeply familiar with apeg, but it's probably going to be hard to figure out your problem without seeing the relevant code.
]]>| 1 | int mpeg2screen(char *filename, int screen_x_offset, int screen_y_offset){ |
| 2 | |
| 3 | int ret=0; |
| 4 | int width=0, height=0; |
| 5 | |
| 6 | APEG_STREAM *movie; // For getting info about the movie |
| 7 | BITMAP *box; // the sandbox for the movie |
| 8 | |
| 9 | // Find out the screen size of the movie |
| 10 | movie = apeg_open_stream(filename); |
| 11 | width = movie->w; |
| 12 | height = movie->h; |
| 13 | apeg_close_stream(movie); |
| 14 | free(movie); |
| 15 | |
| 16 | // SCREEN_W and SCREEN_H are globals set-up by Allegro |
| 17 | if (width<=SCREEN_W && height<=SCREEN_H) { |
| 18 | |
| 19 | // Make a nice sandbox for the movie |
| 20 | box = create_sub_bitmap(screen, screen_x_offset, screen_y_offset, width, height); |
| 21 | |
| 22 | |
| 23 | |
| 24 | // Play the movie in the sandbox |
| 25 | ret = apeg_play_mpg(filename, box,0, NULL); |
| 26 | |
| 27 | |
| 28 | // Note that you don't have to show the video |
| 29 | //ret = apeg_play_mpg(filename, NULL, 0, NULL); |
| 30 | |
| 31 | |
| 32 | |
| 33 | //free up the movie |
| 34 | apeg_close_stream(apeg_stream); |
| 35 | free(apeg_stream); |
| 36 | |
| 37 | clear_bitmap(box); |
| 38 | free(box); |
| 39 | clear_bitmap(screen); |
| 40 | |
| 41 | destroy_bitmap(box); |
| 42 | clear_to_color(screen, makecol(0, 0, 0)); |
| 43 | |
| 44 | // Error handling |
| 45 | if(ret == APEG_ERROR) |
| 46 | { |
| 47 | set_gfx_mode(GFX_TEXT, 0, 0, 0, 0); |
| 48 | allegro_message("APEG Error: %s\n", apeg_error); |
| 49 | } |
| 50 | |
| 51 | } |
| 52 | |
| 53 | else { |
| 54 | |
| 55 | //Movie too big for screen |
| 56 | ret = -999; |
| 57 | |
| 58 | } |
| 59 | |
| 60 | return ret; |
| 61 | |
| 62 | } // end of mpeg2screen() |
EDIT: Everything after the apeg_play_mpg is ignored, at least until a key is pressed, then it will display, but you still have to press a key... it basically is doing the effects of a readkey(), without the readkey()???!
]]>That function looks a bit convoluted, and you're free'ing streams after they're already closed, and closing the internal stream handle. apeg_close_stream invalidates the pointer (meaning it frees it for you, just like apeg_open_stream creates it for you. And you should never do anything to apeg_stream except use it for reference it in the callback to apeg_play_mpg.
That said, there does seem to be a bug in the apeg_play_mpg function that causes it to not quit when it hits the end of the stream (though it'll still run the callback, which if none is specified, causes it to quit when a key is pressed). Since you're Already using the stream functions, why bother with the blocking play function? Something like this would work:
| 1 | int mpeg2screen(char *filename, int screen_x_offset, int screen_y_offset){ |
| 2 | |
| 3 | int ret; |
| 4 | int width, height; |
| 5 | |
| 6 | APEG_STREAM *movie; // For getting info about the movie |
| 7 | |
| 8 | // Find out the screen size of the movie |
| 9 | movie = apeg_open_stream(filename); |
| 10 | // Video may need to be stretched to the proper aspect ratio |
| 11 | // This gives the full size to stretch to |
| 12 | apeg_get_video_area(&width, &height); |
| 13 | |
| 14 | while((ret=apeg_advance_stream(movie, FALSE)) == APEG_OK && !keypressed()) |
| 15 | { |
| 16 | if(movie->frame_updated > 0) |
| 17 | stretch_blit(movie->bitmap, screen, 0, 0, movie->w, movie->h, screen_x_offset, screen_y_offset, width, height); |
| 18 | else if(movie->frame_updated < 0 && !movie->audio.flushed) |
| 19 | rest(1); |
| 20 | } |
| 21 | |
| 22 | apeg_close_stream(movie); |
| 23 | |
| 24 | if(ret != APEG_OK) |
| 25 | alert("Video Error", "", apeg_error, "Ok", NULL, 0, 0); |
| 26 | |
| 27 | return ret!=APEG_OK; /* return 0 = ok, non-0 = bad */ |
| 28 | } |
]]>
simulate_keypress() perhaps?
]]>I get a linker error to apeg_get_video_area...
simulate_keypress() would probably work, except for the fact that it would not execute until a key is pressed(paradox)...the movie isn't closing, so no code is executed, and I wouldn't want the closing code to execute while this was running...the blocking way would work, but only if the movie closed(like it's supposed to).
]]>It's apeg_get_video_size, sorry.
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