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author | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2010-09-27 22:09:53 +0000 |
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committer | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2010-09-27 22:09:53 +0000 |
commit | c85eef4ed8ed838943a01b5bb1f1c9dd8969c423 (patch) | |
tree | 0412d41ec55c08430f03f70d96a9994f8130945d /libavutil/opt.c | |
parent | 486adc55c0faa6ebc693645dbbeb1c11d2768280 (diff) | |
download | ffmpeg-c85eef4ed8ed838943a01b5bb1f1c9dd8969c423.tar.gz |
Move av_set_options_string() from libavfilter to libavutil.
Originally committed as revision 25236 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavutil/opt.c')
-rw-r--r-- | libavutil/opt.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/libavutil/opt.c b/libavutil/opt.c index 10137d0a91..df0aa421b0 100644 --- a/libavutil/opt.c +++ b/libavutil/opt.c @@ -26,6 +26,7 @@ */ #include "avutil.h" +#include "avstring.h" #include "opt.h" #include "eval.h" @@ -452,3 +453,154 @@ void av_opt_set_defaults(void *s) av_opt_set_defaults2(s, 0, 0); } +/** + * Store the value in the field in ctx that is named like key. + * ctx must be an AVClass context, storing is done using AVOptions. + * + * @param buf the string to parse, buf will be updated to point at the + * separator just after the parsed key/value pair + * @param key_val_sep a 0-terminated list of characters used to + * separate key from value + * @param pairs_sep a 0-terminated list of characters used to separate + * two pairs from each other + * @return 0 if the key/value pair has been successfully parsed and + * set, or a negative value corresponding to an AVERROR code in case + * of error: + * AVERROR(EINVAL) if the key/value pair cannot be parsed, + * the error code issued by av_set_string3() if the key/value pair + * cannot be set + */ +static int parse_key_value_pair(void *ctx, const char **buf, + const char *key_val_sep, const char *pairs_sep) +{ + char *key = av_get_token(buf, key_val_sep); + char *val; + int ret; + + if (*key && strspn(*buf, key_val_sep)) { + (*buf)++; + val = av_get_token(buf, pairs_sep); + } else { + av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key); + av_free(key); + return AVERROR(EINVAL); + } + + av_log(ctx, AV_LOG_DEBUG, "Setting value '%s' for key '%s'\n", val, key); + + ret = av_set_string3(ctx, key, val, 1, NULL); + if (ret == AVERROR(ENOENT)) + av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key); + + av_free(key); + av_free(val); + return ret; +} + +int av_set_options_string(void *ctx, const char *opts, + const char *key_val_sep, const char *pairs_sep) +{ + int ret, count = 0; + + while (*opts) { + if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0) + return ret; + count++; + + if (*opts) + opts++; + } + + return count; +} + +#ifdef TEST + +#undef printf + +typedef struct TestContext +{ + const AVClass *class; + int num; + int toggle; + char *string; + int flags; + AVRational rational; +} TestContext; + +#define OFFSET(x) offsetof(TestContext, x) + +#define TEST_FLAG_COOL 01 +#define TEST_FLAG_LAME 02 +#define TEST_FLAG_MU 04 + +static const AVOption test_options[]= { +{"num", "set num", OFFSET(num), FF_OPT_TYPE_INT, 0, 0, 100 }, +{"toggle", "set toggle", OFFSET(toggle), FF_OPT_TYPE_INT, 0, 0, 1 }, +{"rational", "set rational", OFFSET(rational), FF_OPT_TYPE_RATIONAL, 0, 0, 10 }, +{"string", "set string", OFFSET(string), FF_OPT_TYPE_STRING, 0, CHAR_MIN, CHAR_MAX }, +{"flags", "set flags", OFFSET(flags), FF_OPT_TYPE_FLAGS, 0, 0, INT_MAX, 0, "flags" }, +{"cool", "set cool flag ", 0, FF_OPT_TYPE_CONST, TEST_FLAG_COOL, INT_MIN, INT_MAX, 0, "flags" }, +{"lame", "set lame flag ", 0, FF_OPT_TYPE_CONST, TEST_FLAG_LAME, INT_MIN, INT_MAX, 0, "flags" }, +{"mu", "set mu flag ", 0, FF_OPT_TYPE_CONST, TEST_FLAG_MU, INT_MIN, INT_MAX, 0, "flags" }, +{NULL}, +}; + +static const char *test_get_name(void *ctx) +{ + return "test"; +} + +static const AVClass test_class = { + "TestContext", + test_get_name, + test_options +}; + +int main(void) +{ + int i; + + printf("\nTesting av_set_options_string()\n"); + { + TestContext test_ctx; + const char *options[] = { + "", + ":", + "=", + "foo=:", + ":=foo", + "=foo", + "foo=", + "foo", + "foo=val", + "foo==val", + "toggle=:", + "string=:", + "toggle=1 : foo", + "toggle=100", + "toggle==1", + "flags=+mu-lame : num=42: toggle=0", + "num=42 : string=blahblah", + "rational=0 : rational=1/2 : rational=1/-1", + "rational=-1/0", + }; + + test_ctx.class = &test_class; + av_opt_set_defaults2(&test_ctx, 0, 0); + test_ctx.string = av_strdup("default"); + + av_log_set_level(AV_LOG_DEBUG); + + for (i=0; i < FF_ARRAY_ELEMS(options); i++) { + av_log(&test_ctx, AV_LOG_DEBUG, "Setting options string '%s'\n", options[i]); + if (av_set_options_string(&test_ctx, options[i], "=", ":") < 0) + av_log(&test_ctx, AV_LOG_ERROR, "Error setting options string: '%s'\n", options[i]); + printf("\n"); + } + } + + return 0; +} + +#endif |