Function init

libsigrok4DSL/input/in_wav.c:89–129

}

static int init(struct sr_input *in, const char *filename)
{
	struct sr_channel *probe;
	struct context *ctx;
	char buf[40], probename[15];
	int i;

	if (get_wav_header(filename, buf) != SR_OK)
		return SR_ERR;

	if (!(ctx = malloc(sizeof(struct context)))){
		sr_err("%s,ERROR:failed to alloc memory.", __func__);
		return SR_ERR_MALLOC;
	}
    memset(ctx, 0, sizeof(struct context));

	/* Create a virtual device. */
	in->sdi = sr_dev_inst_new(LOGIC, SR_ST_ACTIVE, NULL, NULL, NULL);
	in->sdi->priv = ctx;

   	ctx->samplerate = GUINT32_FROM_LE(*(uint32_t *)(buf + 24));
	ctx->samplesize = GUINT16_FROM_LE(*(uint16_t *)(buf + 34)) / 8;
	if (ctx->samplesize != 1 && ctx->samplesize != 2 && ctx->samplesize != 4) {
		sr_err("only 8, 16 or 32 bits per sample supported.");
		return SR_ERR;
	}

	if ((ctx->num_channels = GUINT16_FROM_LE(*(uint16_t *)(buf + 22))) > 20) {
		sr_err("%d channels seems crazy.", ctx->num_channels);
		return SR_ERR;
	}

	for (i = 0; i < ctx->num_channels; i++) {
		sprintf(probename,"CH%d", i + 1);
		if (!(probe = sr_channel_new(0, SR_CHANNEL_ANALOG, TRUE, probename)))
			return SR_ERR;
		in->sdi->channels = g_slist_append(in->sdi->channels, probe);
	}

	return SR_OK;
}

static int loadfile(struct sr_input *in, const char *filename)
{