/*
* Destructively splits up the argument list to pass to ctr.
*/
int dm_split_args(int *argc, char ***argvp, char *input)
{
char *start, *end = input, *out, **argv = NULL;
unsigned array_size = 0;
*argc = 0;
if (!input) {
*argvp = NULL;
return 0;
}
argv = realloc_argv(&array_size, argv);
if (!argv)
return -ENOMEM;
while (1) {
start = end;
/* Skip whitespace */
while (*start && isspace(*start))
start++;
if (!*start)
break; /* success, we hit the end */
/* 'out' is used to remove any back-quotes */
end = out = start;
while (*end) {
/* Everything apart from '\0' can be quoted */
if (*end == '\\' && *(end + 1)) {
*out++ = *(end + 1);
end += 2;
continue;
}
if (isspace(*end))
break; /* end of token */
*out++ = *end++;
}
/* have we already filled the array ? */
if ((*argc + 1) > array_size) {
argv = realloc_argv(&array_size, argv);
if (!argv)
return -ENOMEM;
}
/* we know this is whitespace */
if (*end)
end++;
/* terminate the string and put it in the array */
*out = '\0';
argv[*argc] = start;
(*argc)++;
}
*argvp = argv;
return 0;
}
static av_cold int init(AVFilterContext *ctx)
{
SoxContext *sox = ctx->priv;
char **argv = NULL;
char *args1 = av_strdup(sox->filter);
int argc = 0, numargs = 0, ret = 0;
sox_encodinginfo_t *encoding;
const sox_effect_handler_t *handler;
char *saveptr;
#define FAIL(err) ret = err; goto end;
// initialize SoX if necessary
if (soxinit != SOX_SUCCESS && (soxinit = sox_init()) != SOX_SUCCESS) {
av_log(ctx, AV_LOG_ERROR, "Error when initing libsox: '%s'\n",
sox_strerror(soxinit));
FAIL(AVERROR(EINVAL));
}
// create arguments array
if ((ret = realloc_argv(&argv, &numargs)) < 0) {
FAIL(ret);
}
// parse arguments into a string array
argv[argc++] = av_strtok(args1, " ", &saveptr);
while (argv[argc++] = av_strtok(NULL, " ", &saveptr)) {
if (argc == numargs) {
if ((ret = realloc_argv(&argv, &numargs)) < 0) {
FAIL(ret);
}
}
}
handler = sox_find_effect(argv[0]);
if (!handler) {
av_log(ctx, AV_LOG_ERROR, "Could not find Sox effect named '%s'\n", argv[0]);
FAIL(AVERROR(EINVAL));
}
sox->effect = sox_create_effect(handler);
if (!sox->effect) {
av_log(ctx, AV_LOG_ERROR, "Could not create Sox effect '%s'\n", argv[0]);
return AVERROR(EINVAL);
}
if (sox->effect->handler.getopts(sox->effect, argc-1, argv) != SOX_SUCCESS) {
av_log(ctx, AV_LOG_ERROR, "Invalid arguments to Sox effect\n");
if (sox->effect->handler.usage)
av_log(ctx, AV_LOG_ERROR, "Usage: %s\n", sox->effect->handler.usage);
return AVERROR(EINVAL);
}
if (!(encoding = av_mallocz(sizeof(sox_encodinginfo_t))))
return AVERROR(ENOMEM);
encoding->encoding = SOX_DEFAULT_ENCODING;
encoding->bits_per_sample = 32;
sox->effect->out_encoding = sox->effect->in_encoding = encoding;
sox->effect->clips = 0;
sox->effect->imin = 0;
end:
av_free(args1);
return ret;
}
