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screenshot: move code to open file out of image writer functions

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This is a minor simplification. The original intend was to only open a
file if opening the image encoder went well, but this obscure special
case is not worth bothering the image writer functions with more error
handling.
This commit is contained in:
wm4 2012-02-29 04:28:27 +01:00
parent 12c44610ad
commit ea7820ab66
1 changed files with 16 additions and 29 deletions
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45
screenshot.c
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@ -67,7 +67,7 @@ typedef struct screenshot_ctx {
struct img_writer {
const char *file_ext;
int (*write)(screenshot_ctx *ctx, mp_image_t *image, char *filename);
int (*write)(screenshot_ctx *ctx, mp_image_t *image, FILE *fp);
};
void screenshot_init(struct MPContext *mpctx)
@ -79,18 +79,8 @@ void screenshot_init(struct MPContext *mpctx)
};
}
static FILE *open_file(screenshot_ctx *ctx, char *fname) {
FILE *fp = fopen(fname, "wb");
if (fp == NULL)
mp_msg(MSGT_CPLAYER, MSGL_ERR, "\nError opening %s for writing!\n",
fname);
return fp;
}
static int write_png(screenshot_ctx *ctx, struct mp_image *image,
char *filename)
static int write_png(screenshot_ctx *ctx, struct mp_image *image, FILE *fp)
{
FILE *fp = NULL;
void *outbuffer = NULL;
int success = 0;
@ -121,10 +111,6 @@ static int write_png(screenshot_ctx *ctx, struct mp_image *image,
if (size < 1)
goto error_exit;
fp = open_file(ctx, filename);
if (fp == NULL)
goto error_exit;
fwrite(outbuffer, size, 1, fp);
fflush(fp);
@ -135,8 +121,6 @@ static int write_png(screenshot_ctx *ctx, struct mp_image *image,
error_exit:
if (avctx)
avcodec_close(avctx);
if (fp)
fclose(fp);
free(outbuffer);
return success;
}
@ -152,14 +136,10 @@ static void write_jpeg_error_exit(j_common_ptr cinfo)
longjmp(*(jmp_buf*)cinfo->client_data, 1);
}
static int write_jpeg(screenshot_ctx *ctx, mp_image_t *image, char *filename)
static int write_jpeg(screenshot_ctx *ctx, mp_image_t *image, FILE *fp)
{
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
FILE *outfile = open_file(ctx, filename);
if (!outfile)
return 0;
cinfo.err = jpeg_std_error(&jerr);
jerr.error_exit = write_jpeg_error_exit;
@ -168,12 +148,11 @@ static int write_jpeg(screenshot_ctx *ctx, mp_image_t *image, char *filename)
cinfo.client_data = &error_return_jmpbuf;
if (setjmp(cinfo.client_data)) {
jpeg_destroy_compress(&cinfo);
fclose(outfile);
return 0;
}
jpeg_create_compress(&cinfo);
jpeg_stdio_dest(&cinfo, outfile);
jpeg_stdio_dest(&cinfo, fp);
cinfo.image_width = image->width;
cinfo.image_height = image->height;
@ -195,7 +174,6 @@ static int write_jpeg(screenshot_ctx *ctx, mp_image_t *image, char *filename)
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
fclose(outfile);
return 1;
}
@ -451,9 +429,18 @@ void screenshot_save(struct MPContext *mpctx, struct mp_image *image)
char *filename = gen_fname(ctx);
if (filename) {
mp_msg(MSGT_CPLAYER, MSGL_INFO, "*** screenshot '%s' ***\n", filename);
if (!writer->write(ctx, dst, filename))
mp_msg(MSGT_CPLAYER, MSGL_ERR, "Error writing screenshot!\n");
FILE *fp = fopen(filename, "wb");
if (fp == NULL) {
mp_msg(MSGT_CPLAYER, MSGL_ERR, "\nError opening %s for writing!\n",
filename);
} else {
mp_msg(MSGT_CPLAYER, MSGL_INFO, "*** screenshot '%s' ***\n",
filename);
int success = writer->write(ctx, dst, fp);
success = !fclose(fp) && success;
if (!success)
mp_msg(MSGT_CPLAYER, MSGL_ERR, "Error writing screenshot!\n");
}
talloc_free(filename);
}